INTERACTION BETWEEN 5G AND NON-5G MANAGEMENT FUNCTION ENTITIES

Abstract

A method of providing telecommunication communication services to a customer, comprising, at a network management function (MF) of a telecommunication service provider: receiving an order in accordance with an agreement as to terms of a telecommunications service offering; accessing network resources that satisfy the terms of the service offering; initializing an instance of the service offering using the resources accessible thereby, creating at least one interface by which the telecommunications service offering is made available to the customer; and exposing each of the at least one created interfaces to enable a network MF of the customer to use the telecommunication.service offering.

Description

FIELD OF THE INVENTION

The present disclosure pertains to the field of communications networks, and in particular to interaction between 5G and non-5G management function (MF) entities.

BACKGROUND

Modern approaches to network communications have included concepts of providing offerings of telecommunication services as to customer. Indeed, the Third Generation Partnership Project (3GPP) Technical Reference (TR) 28.801 has proposed the introduction of a number of such service offerings, notably Communication as a Service (CaaS), Network Slice as a Service (NSaaS), Network Slice Subnet as a Service (NSSaaS) and Infrastructure as a Service (IaaS). These service offerings employ a concept known as network slicing, in which pooled network resources are used to create a series of network slices. Within each slice, one or more existing network nodes are instantiated with those network functions (NFs) that provide a dynamic service level capability for a particular slice.

The use of network slices permits only those NFs that are appropriate, to be instantiated, and only as and when appropriate. In some examples, the NF can be located in the control plane (CP). In some examples, the NF can be located in the user plane (UP). In some examples, the NF can be located in the management plane (MP).

In order to provision these four types of telecommunication services, it would be beneficial to identify new network management functions (MFs) for supporting each service, as well as new interfaces for the various network MFs (NMFs). Further, it would be beneficial to identify new interfaces that allow such services to access non-3GPP and non-5G network management system capabilities.

SUMMARY

An object of embodiments of the present disclosure is to provide techniques for management of network slices and associated services.

An aspect/embodiment of the present disclosure provides a method of providing telecommunication communication services to a customer, comprising, at a network MF of an telecommunication service provider: receiving an order in accordance with an agreement as to terms of a telecommunications service offering; accessing network resources that satisfy the terms of the service offering; initializing an instance of the service offering using the resources accessible thereby; creating at least one interface by which the service offering is made available to the customer; and exposing each of the at least one created interfaces to enable an MF of the customer to use the service offering.

In any preceding aspect/embodiment, the agreement can be negotiated with the customer by a network service MF (SMF). In an embodiment, the network SMF can receive directions from a BSS network MF as to the terms of the service offering.

In any preceding aspect/embodiment, the step of creating can comprise creating an SMF to SMF interface between the network SMF and an SMF of the customer. In an embodiment, the SMF to SMF interface can comprise at least one of a template request interface and a service requirement interface. In an embodiment, the SMF to SMF template request interface can specify at least one service offering selected from a group consisting of CaaS, NSaaS, NSSaaS and IaaS.

In any preceding aspect/embodiment, the step of creating can comprise creating an SMF to network MF interface between the network SMF and the network MF. In an embodiment, the SMF to network MF interface can comprise at least one of a template request interface, a service requirement interface, a network requirement interface and a resource management interface. In an embodiment, the network MF can comprise at least one of: a NSMF, where the customer MF is a CSMF and the SMF to network MF template request interface specifies an NSaaS offering; a NSSMF, where the customer MF is an NSMF and the SMF to network MF template request interface specifies an NSSaaS offering; and an InMF, where the customer MF is an NSSMF and the SMF to network MF template request interface specifies an IaaS offering. In an embodiment, the exposed at least one interface enabling the customer MF to use the service offering of the network MF comprises at least one of an RM interface and a LM interface.

In any preceding aspect/embodiment, the step of creating can comprise creating an interface between the network MF and another MF to support at least one of RM management and a LM function.

In any preceding aspect/embodiment, the step of creating can comprise creating an interface between an NSMF and at least one of an EM MF, a DM MF and a MANO MF. In an embodiment, the exposed at least one interface can perform interface conversion between the NSMF and the at least one of the EM MF, DM MF and MANO MF.

An aspect/embodiment of the present disclosure provides a network MF of a telecommunications service provider, comprising: a processor and a non-transitory memory. The memory is for storing instructions that when executed by the processor causes the network MF to provide a telecommunications communication service to a customer by: receiving an order in accordance with an agreement as to terms of a telecommunications service offering; accessing network resources that satisfy the terms of the service offering; initializing an instance of the service offering using the resources accessible thereby; creating at least one interface by which the service offering is made available to the customer; and exposing each of the at least one created interfaces to enable an MF of the customer to use the service offering.

BRIEF DESCRIPTION OF THE FIGURES

Further features and advantages of the present disclosure will become apparent from the following detailed description, taken in combination with the appended drawings, in which:

FIG. 1 is a block diagram of an electronic device within a computing and communications environment that may be used for implementing devices and methods in accordance with representative examples of the present disclosure;

FIG. 2 is a block diagram illustrating a logical platform under which an Electronic Device can provide virtualization services;

FIG. 3A is a block diagram schematically illustrating an example architecture in which network slicing can be implemented;

FIG. 3B is a block diagram illustrating the architecture discussed in FIG. 3A from the perspective of a single slice;

FIG. 4 is a block diagram illustrating an example ETSI NFV MANO-compliant management and orchestration service;

FIG. 5A is a block diagram illustrating example network- and customer-side MFs to support a Communications as a Service (CaaS) offering;

FIG. 5B is a block diagram illustrating example network- and customer-side MFs to support a Network Slice as a Service (NSaaS) offering;

FIG. 5C is a block diagram illustrating example network- and customer-side MFs to support a Network Slice Subnet as a Service (NSSaaS) offering;

FIG. 5D is a block diagram illustrating example network- and customer-side MFs to support an Infrastructure as a Service (IaaS) offering.

FIG. 6 is a block diagram illustrating the block diagram of FIG. 5A in greater detail, showing network-side MFs and their interconnectivity to support communication services;

FIG. 7 is a block diagram illustrating the block diagram of FIG. 5B in greater detail, showing network-side MFs and their interconnectivity to support an NSaaS offering;

FIG. 8 is a block diagram illustrating relationships between the block diagram of FIG. 5C in greater detail, showing network-side MFs MFs and their interconnectivity an NSSaaS offering;

FIG. 9 is a block diagram illustrating relationships between the block diagram of FIG. 5D in greater detail, showing network-side MFs MFs and their interconnectivity an IaaS offering; and

FIG. 10 is a flow chart showing method actions according to an example.

FIG. 11 is a flow chart showing the phases of the CSI lifecycle.

FIG. 12 is a flow chart showing the related management functions of a NSI.

FIG. 13 illustrates the relation between SMs, CSMF and SM, NSMF and SM, NSSMF and SM.

It will be noted that throughout the appended drawings, like features are identified by like reference numerals.

DETAILED DESCRIPTION

In the following description, features of the present disclosure are described by way of example embodiments. For convenience of description, these embodiments make use of features and terminology known from 4G and 5G networks as defined by the Third Generation Partnership Project (3GPP). However, it shall be understood that the present disclosure is not limited to such networks. Rather, methods and systems in accordance with the present disclosure may be implemented in any network in which a mobile device may connect to the network through at least one access point, and subsequently be handed-over to at least one other access point during the course of a communications session.

FIG. 1 is a block diagram of an electronic device (ED) 102 illustrated within a computing and communications environment 100 that may be used for implementing the devices and methods disclosed herein. In some embodiments, the electronic device 102 may be an element of communications network infrastructure, such as a base station (for example a NodeB, an enhanced Node B (eNodeB), a next generation NodeB (sometimes referred to as a gNodeB or gNB), a home subscriber server (HSS), a gateway (GW) such as a packet gateway (PGW) or a serving gateway (SGW) or various other nodes or functions within an evolved packet core (EPC) network. In other embodiments, the electronic device 2 may be a device that connects to network infrastructure over a radio interface, such as a mobile phone, smart phone or other such device that may be classified as a User Equipment (UE). In some embodiments, ED 102 may be a Machine Type Communications (MTC) device (also referred to as a machine-to-machine (m2m) device), or another such device that may be categorized as a UE despite not providing a direct service to a user. In some references, an ED 102 may also be referred to as a mobile device (MD), a term intended to reflect devices that connect to mobile network, regardless of whether the device itself is designed for, or capable of, mobility. Specific devices may utilize all of the components shown or only a subset of the components, and levels of integration may vary from device to device. Furthermore, a device may contain multiple instances of a component, such as multiple processors, memories, transmitters, receivers, etc. The electronic device 102 typically includes a processor 106, such as a Central Processing Unit (CPU), and may further include specialized processors such as a Graphics Processing Unit (GPU) or other such processor, a memory 108, a network interface 110 and a bus 112 to connect the components of ED 102. ED 102 may optionally also include components such as a mass storage device 114, a video adapter 116, and an I/O interface 118 (shown in dashed lines).

The memory 108 may comprise any type of non-transitory system memory, readable by the processor 106, such as static random-access memory (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), read-only memory (ROM), or a combination thereof. In specific embodiments, the memory 108 may include more than one type of memory, such as ROM for use at boot-up, and DRAM for program and data storage for use while executing programs. The bus 112 may be one or more of any type of several bus architectures including a memory bus or memory controller, a peripheral bus, or a video bus.

The electronic device 102 may also include one or more network interfaces 110, which may include at least one of a wired network interface and a wireless network interface. As illustrated in FIG. 1, network interface 110 may include a wired network interface to connect to a network 120, and also may include a radio access network interface 122 for connecting to other devices over a radio link. When ED 102 is network infrastructure, the radio access network interface 122 may be omitted for nodes or functions acting as elements of the Core Network (CN) other than those at the radio edge (e.g. an eNB). When ED 102 is infrastructure at the radio edge of a network, both wired and wireless network interfaces may be included. When ED 102 is a wirelessly connected device, such as a User Equipment, radio access network interface 122 may be present and it may be supplemented by other wireless interfaces such as WiFi network interfaces. The network interfaces 110 allow the electronic device 102 to communicate with remote entities such as those connected to network 120.

The mass storage 114 may comprise any type of non-transitory storage device configured to store data, programs, and other information and to make the data, programs, and other information accessible via the bus 112. The mass storage 114 may comprise, for example, one or more of a solid-state drive, hard disk drive, a magnetic disk drive, or an optical disk drive. In some embodiments, mass storage 114 may be remote to the electronic device 102 and accessible through use of a network interface such as interface 110. In the illustrated embodiment, mass storage 114 is distinct from memory 108 where it is included, and may generally perform storage tasks compatible with higher latency, but may generally provide lesser or no volatility. In some embodiments, mass storage 114 may be integrated with a memory 108 to form an heterogeneous memory.

The optional video adapter 116 and the I/O interface 118 (shown in dashed lines) provide interfaces to couple the electronic device 102 to external input and output devices. Examples of input and output devices include a display 124 coupled to the video adapter 116 and an I/O device 126 such as a touch-screen coupled to the I/O interface 118. Other devices may be coupled to the electronic device 102, and additional or fewer interfaces may be utilized. For example, a serial interface such as Universal Serial Bus (USB) (not shown) may be used to provide an interface for an external device. Those skilled in the art will appreciate that in embodiments in which ED 102 is part of a data center, I/O interface 118 and Video Adapter 116 may be virtualized and provided through network interface 110.

In some embodiments, electronic device 102 may be a standalone device, while in other embodiments electronic device 102 may be resident within a data center. A data center, as will be understood in the art, is a collection of computing resources (typically in the form of servers) that can be used as a collective computing and storage resource. Within a data center, a plurality of servers can be connected together to provide a computing resource pool upon which virtualized entities can be instantiated. Data centers can be interconnected with each other to form networks consisting of pools computing and storage resources connected to each by connectivity resources. The connectivity resources may take the form of physical connections such as Ethernet or optical communications links, and may include wireless communication channels as well. If two different data centers are connected by a plurality of different communication channels, the links can be combined together using any of a number of techniques including the formation of link aggregation groups (LAGs). It should be understood that any or all of the computing, storage and connectivity resources (along with other resources within the network) can be divided between different sub-networks, in some cases in the form of a resource slice. If the resources across a number of connected data centers or other collection of nodes are sliced, different network slices can be created.

FIG. 2 is a block diagram schematically illustrating an architecture of a representative server 200 usable in embodiments of the present disclosure. It is contemplated that the server 200 may be physically implemented as one or more computers, storage devices and routers (any or all of which may be constructed in accordance with the system 100 described above with reference to FIG. 1) interconnected together to form a local network or cluster, and executing suitable software to perform its intended functions. Those of ordinary skill will recognize that there are many suitable combinations of hardware and software that may be used for the purposes of the present disclosure, which are either known in the art or may be developed in the future. For this reason, a figure showing the physical server hardware is not included in this specification. Rather, the block diagram of FIG. 2 shows a representative functional architecture of a server 200, it being understood that this functional architecture may be implemented using any suitable combination of hardware and software. It will also be understood that server 200 may itself be a virtualized entity. Because a virtualized entity has the same properties as a physical entity from the perspective of another node, both virtualized and physical computing platforms may serve as the underlying resource upon which virtualized functions are instantiated.

As may be seen in FIG. 2, the illustrated server 200 generally comprises a hosting infrastructure 202 and an application platform 204. The hosting infrastructure 202 comprises the physical hardware resources 206 (such as, for example, information processing, traffic forwarding and data storage resources) of the server 200, and a virtualization layer 208 that presents an abstraction of the hardware resources 206 to the Application Platform 204. The specific details of this abstraction will depend on the requirements of the applications being hosted by the Application layer (described below). Thus, for example, an application that provides traffic forwarding functions may be presented with an abstraction of the hardware resources 206 that simplifies the implementation of traffic forwarding policies in one or more routers. Similarly, an application that provides data storage functions may be presented with an abstraction of the hardware resources 206 that facilitates the storage and retrieval of data (for example using Lightweight Directory Access Protocol-LDAP). The virtualization layer 208 and the application platform 204 may be collectively referred to as a Hypervisor.

The application platform 204 provides the capabilities for hosting applications and includes a virtualization manager 210 and network application platform services 212. The virtualization manager 210 supports a flexible and efficient multi-tenancy run-time and hosting environment for applications 214 by providing Infrastructure as a Service (IaaS) facilities. In operation, the virtualization manager 210 may provide a security and resource “sandbox” for each application being hosted by the platform 204. Each “sandbox” may be implemented as a Virtual Machine (VM) 216 that may include an appropriate operating system and controlled access to (virtualized) hardware resources 206 of the server 200. The network application platform services 212 provide a set of middleware application services and infrastructure services to the applications 214 hosted on the application platform 204, as will be described in greater detail below.

Applications 214 from vendors, service providers, and third-parties may be deployed and executed within a respective Virtual Machine 216. For example, MANagement and Orchestration (MANO) functions and Service Oriented Network Auto-Creation (SONAC) functions (or any of Software Defined Networking (SDN), Software Defined Topology (SDT), Software Defined Protocol (SDP) and Software Defined Resource Allocation (SDRA) controllers that may in some embodiments be incorporated into a SONAC controller) may be implemented by means of one or more applications 214 hosted on the application platform 204 as described above. Communication between applications 214 and services in the server 200 may conveniently be designed according to the principles of Service-Oriented Architecture (SOA) known in the art.

Communication services 218 may allow applications 214 hosted on a single server 200 to communicate with the application-platform services 212 (through pre-defined Application Programming Interfaces (APIs) for example) and with each other (for example through a service-specific API).

A service registry 220 may provide visibility of the services available on the server 200. In addition, the service registry 220 may present service availability (e.g. status of the service) together with the related interfaces and versions. This may be used by applications 214 to discover and locate the end-points for the services they require, and to publish their own service end-point for other applications to use.

Mobile-edge Computing allows cloud application services to be hosted alongside virtualized mobile network elements in data centers that are used for supporting the processing requirements of the Cloud-Radio Access Network (C-RAN). For example, eNodeB or gNB nodes may be virtualized as applications 214 executing in a VM 216. Network Information Services (NIS) 222 may provide applications 214 with low-level network information. For example, the information provided by NIS 222 may be used by an application 214 to calculate and present high-level and meaningful data such as: cell-ID, location of the subscriber, cell load and throughput guidance.

A Traffic Off-Load Function (TOF) service 224 may prioritize traffic, and route selected, policy-based, user-data streams to and from applications 214. The TOF service 224 may be supplied to applications 214 in various ways, including: A Pass-through mode where (either or both of uplink and downlink) traffic is passed to an application 214 which can monitor, modify or shape it and then send it back to the original Packet Data Network (PDN) connection (e.g. 3GPP bearer); and an End-point mode where the traffic is terminated by the application 214 which acts as a server.

As may be appreciated, the server architecture of FIG. 2 is an example of Platform Virtualization, in which each Virtual Machine 216 emulates a physical computer with its own operating system, and (virtualized) hardware resources of its host system. Software applications 214 executed on a virtual machine 216 are separated from the underlying hardware resources 206 (for example by the virtualization layer 208 and Application Platform 204). In general terms, a Virtual Machine 216 is instantiated as a client of a hypervisor (such as the virtualization layer 208 and application-platform 204) which presents an abstraction of the hardware resources 206 to the Virtual Machine 216.

Other virtualization technologies are known or may be developed in the future that may use a different functional architecture of the server 200. For example, Operating-System-Level virtualization is a virtualization technology in which the kernel of an operating system allows the existence of multiple isolated user-space instances, instead of just one. Such instances, which are sometimes called containers, virtualization engines (VEs) or jails (such as a “FreeBSD jail” or “chroot jail”), may emulate physical computers from the point of view of applications running in them. However, unlike virtual machines, each user space instance may directly access the hardware resources 206 of the host system, using the host systems kernel. In this arrangement, at least the virtualization layer 208 of FIG. 2 would not be needed by a user space instance. More broadly, it will be recognised that the functional architecture of a server 200 may vary depending on the choice of virtualisation technology and possibly different vendors of a specific virtualisation technology.

FIG. 3A illustrates an architecture 330 that connects a plurality of connectivity, compute and storage resources, and supports network slicing. In the following, resources are connected to other discrete resources through Connectivity Resources 334, 338, 340, 344 and 348. It will be understood that as network functions are instantiated within resources, they may be connected to each other by virtual connections that in some embodiments do not rely upon the physical connectivity resources illustrated, but instead may be connected to each other by virtual connections, which will also be considered as connectivity resources. Resource 1332 is connected to Resource 2336 by Connectivity Resource 334. Resource 2336 is connected to unillustrated resources through Connectivity Resource 338, and is also connected to Resource 3342 by Connectivity Resource 340. Resource 4346 is connected to Resource 3342 through Connectivity Resource 344, and to Resource 1332 by Connectivity Resource 348. Resource 1332, Resource 2336, Resource 3342 and Resource 4346 should be understood as representing both compute and storage resources, although specialized functions may also be included. In some embodiments a specialized network function may be represented by any or all of Resource 1332, Resource 2336, Resource 3342 and Resource 4346, in which case, it may be the capability or capacity of the network function that is being sliced. Connectivity Resources 334, 338, 340, 344 and 1348 may be considered, for the following discussions, as logical links between two points (e.g. between two data centers) and may be based on set of physical connections.

Resource 1332 is partitioned to allocate resources to Slice A 332A, and Slice B 332B. A portion 332U of the resources available to Resource 1332 remains unallocated. Those skilled in the art will appreciate that upon allocation of the network resources to different slices, the allocated resources are isolated from each other. This isolation, both in the compute and storage resources, ensures that processes in one slice do not interact or interfere with the processes and functions of the other slices. This isolation can be extended to the connectivity resources as well. Connectivity Resource 334 is partitioned to provide connectivity to Slice A 334A and Slice B 334B, and also retains some unallocated bandwidth 334U. It should be understood that in any resource that either has unallocated resources or that has been partitioned to support a plurality of resources, the amount of the resource (e.g. the allocated bandwidth, memory, or number of processor cycles) can be varied or adjusted to allow changes to the capacity of each slice. In some embodiments, slices are able to support “breathing”, which allows the resources allocated to the slice to increase and decrease along with any of the available resources, the required resources, an anticipated resource need, or other such factors, alone or in combination with each other. In some embodiments the allocation of resources may be in the form of soft slices in which a fixed allocation is not committed and instead the amount of the resource provided may be flexible. In some embodiments, a soft allocation may allocate a percentage the resource to be provided over a given time window, for example 50% of the bandwidth of a connection over a time window. This may be accompanied by a minimum guaranteed allocation. Receiving a guarantee of 50% of the capacity of a connectivity resource at all times may provide very different service characteristics than receiving 50% of the capacity of the connectivity resource over a ten second window.

Resource 2336 is partitioned to support allocations of the available compute and storage resources to Slice A 336A, Slice C 336C and Slice B 336B. Because there is no allocation of resources in connectivity resource 334 to Slice C, Resource 2336 may, in some embodiments, not provide a network interface to Slice C 336C to interact with connectivity resource 334. Resource 2336 can provide an interface to different slices to Connectivity Resource 338 in accordance with the slices supported by Connectivity Resource 338. Connectivity Resource 340 is allocated to Slice A 340A and Slice C 340C with some unallocated capacity 340U. Connectivity Resource 340 connects Resource 2336 with Resource 3342.

Resource 3342 provides compute and storage resources that are allocated exclusively to Slice C 342C, and is also connected to Connectivity Resource 344 which in addition to the unallocated portion 344U includes an allocation of Connectivity Resource 344A to slice A. It should be noted that from the perspective of functions or processes within Slice A, Resource 3342 may not be visible. Connectivity Resource 344 provides a connection between Resource 3342 and Resource 4346, whose resources are allocated entirely to Slice A 346A. Resource 4346 is connected to Resource 1332 by Connectivity Resource 348, which has a portion of the connection allocated to Slice A 348A, while the balance of the resources 348U are unallocated.

FIG. 3B illustrates the view of the architecture 336 of FIG. 3A as would be seen from the perspective of Slice A. This may be understood as a view of the resources allocated to Slice A 350 across the illustrated network segment. From within Slice A 350, only the portions of the resources that have been allocated to Slice A 350 are visible. Thus, instead of being able to see the full capacity and capability of Resource 1332, the capabilities and capacity of the portion allocated to Slice A 332A is available. Similarly, instead of being able to see the capacity and capabilities of Resource 2336, only the capabilities and capacity of the portion allocated to Slice A 336A are available. Because nothing from Resource 3342 had been allocated to Slice A 350, Resource 3342 is not present within the topology of Slice A 350. All of the capacity and capability of Resource 4346 was allocated to Slice A 346, and as such is present within Slice A 350. Slice A 332A of Resource 1332 is connected to Slice A 336A of Resource 2336 by logical link 352. Logical Link 352 may correspond to the portion of connectivity resource 334 allocated to Slice A 334A. Slice A 336A is connected to logical link 354 (representative of the portion of connectivity resource 338 allocated to Slice A 350), and is connected to Slice A 346A by logical link 356. Logical link 356 is representative of the portions of connectivity resource 340 and connectivity resource 344 that have been allocated to Slice A (portions 340A and 344A respectively). It should be understood that due to the absence of Resource 3342 from Slice A 150, any traffic transmitted by Slice A 336A onto Connectivity Resource 340A will be delivered to Resource 4346, and similarly any traffic transmitted from Slice 346A into Connectivity Resource 344A will be delivered to Slice A 336A. As such, within Slice A 350, Connectivity Resources 340A and 344A can be modelled as a single logical link 356. Logical link 358 is representative of the portion of Connectivity Resource 348 allocated to slice A 348A.

It should be understood that within the storage and compute resources illustrated in FIGS. 3A and 3B, network functions can be instantiated using any of a number of known techniques, including network function virtualization (NFV), to create Virtual Network Functions (VNFs). While conventional telecommunications networks, including so-called Third Generation and Fourth Generation (3G/4G) networks, can be implemented using virtualized functions in their core networks, next generation networks, including so-called Fifth Generation (5G) networks, are expected to use NFV and other related technologies as fundamental building blocks in the design of a new Core Network (CN) and Radio Access Network (RAN). By using NFV, and technologies such as Software Defined Networking (SDN), functions in a CN can be instantiated at a location in the network that is determined based on the needs of the network. It should be understood that if a network slice is created, the allocation of resources at different data centers allows for the instantiation of a function at or near a particular geographic location, even within the slice where resources have been abstracted. This allows virtualized functions to be “close” in a physical sense to the location at which they are used. This may be useful, and may be combined with a sense of topological closeness to select a logical location at which to instantiate a function so that it is geographically or topologically close to a selected physical or network location.

The European Telecommunications Standards Institute (ETSI) has developed a set of standards for Network Function Virtualization (NFV) MANagement and Orchestration (MANO). As illustrated in FIG. 4, the NFV-MANO system allows for the management of NFV instantiation and modification. As illustrated, there can be interfaces to existing systems such as the OSS/BSS 450. In network architecture 430, an NFV-MANO system 432 includes an orchestrator 434 which can access libraries 436 such as Network Service catalog 438, VNF Catalog 440, VNF Instances repository 442 and NFVI resources repository 444. The NS Catalog 438 may include templates which can be used as the basis for supporting network services. VNF catalog 440 may contain templates for the instantiation of different classes of VNFs. A particular VNF, after being instantiated, may be referred to as a VNF instance, and its attributes may be stored in VNF instances repository 442. NFVI resources 444 may be used to track the availability of resources, including both virtual resources and the physical infrastructure upon which they are instantiated. The NFVO 434 can be connected to a number of VNF Managers 446 through an OR-VNFM interface, and to a Virtualized Infrastructure Manager (VIM) 448 through a OR-VI interface. The VNFM 446 and VIM 448 can be connected to each other through a Vi-VNFM interface.

The NFV MANO 432 can communicate with an OSS/BSS system 450 through OS-MA interface, and to a Service, VNF & Infrastructure description database 452 though an SE-MA interface. The Service, VNF & Infrastructure description database 452 can contain operator information about the services, VNFs and infrastructure deployed in the network. Service, VNF & Infrastructure description database 452 and OSS/BSS 450 can be connected to each other so that the OSS/BSS 450 can update and maintain the Service, VNF & Infrastructure description database 452 as needed.

NFVI 470 interacts with the VIM 448 through the NF-VI interface. Underlying resources can often be classified as compute resources 474, memory resources 478 and network resources 482. Memory resources 478 may also be referred to as storage resources, while network resources 482 may also be referred to as connectivity resources. A virtualization layer 472 allows for the abstraction of the underlying resources which it is connected to through a Vi-HA interface. It should be understood that the underlying resources may be either physical or virtual resources. The Virtualization layer 472 allows for the abstraction of the underlying resources into virtual compute resources 476, virtual memory resources 480 and virtual network resources 484. These virtualized resources can be provided to the element management system 454 through the VN-NF interface so that they can be used as the resources upon which the VNFs (shown as VNF1458, VNF2462 and VNF 3466) can be instantiated. EM 454 can be connected to the VNFM 446 within NFV MANO 432 through interface VE-VNFM, and to the OSS/BSS 450 through another interface. Each VNF instantiated upon the virtual resources provided by NFVI 470 can be associated with an element manager (EM1456, EM2460 and EM3464). The use of an element manager allows the OSS/BSS to have two paths through which the VNFs can be managed. A VNF can be managed through the VNFM 446, or through the element manager associated with the VNF. Each element manager can provide the same management controls that it would otherwise provide for a physical network element. Thus, the OSS/BSS 450 can treat each VNF as a conventional network function. Modification to the resource allocation associated with a VNF can be requested by an element manager through the VNFM 446, or through a request from the OSS/BSS 450 over the OS-MA interface.

The virtualization of network functions allows functions to be deployed with the resources that are required. As the demand for the functions increases, the resources allocated to the functions can be increased, which avoids an intentional over provisioning of the functions at instantiation. In conjunction with the above described slicing and data center utilization, flexible networks can be deployed in a manner that allows an operator to dynamically modify the connectivity between functions (thus changing the logical topology of the network) and to dynamically modify the location of and resources allocated to the network functions (thus changing the physical topology of the underlying network). Additional resources at the same location can be allocated to existing function to allow for scaling up of an existing function, and resources can be removed from an allocation to allow for a scaling down of a function. Resources from more than one resource pool or data center can be allocated to a function so that it can be scaled out, and resources from different pools can be removed to allow a function to be scaled in. Functions can be moved by transferring their state information to another network function, and in some instances, a function can be moved through a combination of scaling out and scaling in functions.

3GPP TR 28.801 describes three functional entities for managing one or more NSIs to support communication services. These communication services and the functional entities may be, in some embodiments, designed to support fifth generation mobile communications networks (also referred to as 5G). These functional entities include:

• • Communication Service Management Function (CSMF): Responsible for translating the communication service related requirement to network slice related requirements. The CSMF communicates with Network Slice Management Function (NSMF).
  • Network Slice Management Function (NSMF): Responsible for management and orchestration of NSI. Derive network slice subnet related requirements from network slice related requirements. The NSMF communicates with the Network Slice Subnet Management Function (NSSMF) and Communication Service Management Function.
  • Network Slice Subnet Management Function (NSSMF): Responsible for management and orchestration of NSSI. The NSSMF communicates with the NSMF.

Turning now to FIG. 5A, there is shown a block diagram shown generally at 500 illustrating example network-side and customer-side MFs to offer a CaaS to a customer. FIG. 5A shows a notional boundary between a customer-side 501 and network-side 502 of a communication system. A customer is shown on the customer-side 501 of the notional boundary and includes a communication service customer (CSC) 510 and a network management system (NMS) is shown of a network side of the notional boundary and includes a customer service provider (CSP) 520.

The CSP 520 comprises at least one network-side MF including without limitation, a CSMF 521, an NSMF 522, an NSSMF 523 and an Infrastructure Management Function (InMF) 524.

The CSMF 521 is configured to instantiate an interface 503 and expose the interface 503 to the CSC 510 to enable the CSC 510 to use a CaaS offering provided by the CSP 520. Thus it may be said that the interface 503 between the CSMF 521 and the CSC 510 constitutes an exposed interface.

The NSMF 522 is configured to instantiate an interface 525 and expose the interface 525 to the CSMF 521 to enable the CSMF 521 to use a NSaaS offering provided by the NSMF 522. Further, the NSSMF 523 is configured to instantiate an interface 526 and expose the interface 526 to the NSMF 522 to enable the NSMF 522 to use an NSSaaS offering provided by the NSSMF 523. Still further, the InMF 524 is configured to instantiate an interface 527 and expose the interface 527 to the NSSMF 523 to enable the NSSMF 523 to use an IaaS offering provided by the InMF 524.

Turning now to FIG. 5B, there is shown a block diagram shown generally at 504 illustrating example network-side 502 and customer-side 501 MFs to offer an NSaaS to a customer. The figure shows a network service provider (NSP) serving as a slice provider 530 of the network-side 502 and a CSP 528 acting as a network slice customer, which may be the CSP 520, on the customer-side 501.

The slice provider 530 comprises at least one network-side MF including without limitation, an NSMF 522, an NSSMF 523 and an InMF 524.

The customer-side CSP 528 comprises at least one customer-side MF including without limitation, a CSMF 521 that provides it with access to communication services.

The network-side NSMF 522 is configured to instantiate an interface 505 and expose the interface 505 to enable the customer-side CSMF 521 to use network slice-related capabilities provided by the network-side NSMF 522 in the form of an NSaaS offering. Thus it may be said that the interface 505 between the network-side NSMF 522 and the customer-side CSMF 521 of the customer-side CSP 528 constitutes an exposed interface.

The network-side NSSMF 523 is configured to instantiate an interface 526 and expose the interface 526 to enable the network-side NSMF 522 to use a NSSaaS offering provided by the NSSMF 523. Further, the InMF 524 is configured to instantiate an interface 527 and expose the interface to enable the NSSMF 523 to use an IaaS offering provided by the InMF 524.

Turning now to FIG. 5C, there is shown a block diagram shown generally at 506 illustrating example network-side 502 and customer-side 501 MFs to offer an NSSaaS to a customer. The figure shows an NSP serving as a subslice provider 540 on the network-side 502 and an NSP serving as a subslice customer 531, which may be the slice provider 530, on the customer side 501.

The subslice provider 540 comprises at least one network-side MF including without limitation, an NSSMF 523 and an InMF 524.

The customer side subslice customer 550 comprises at least one customer-side MF including without limitation, a CSMF 521 and an NSMF 522. The customer-side NSMF 522 is configured to instantiate interface 525 and expose interface 525 to enable the customer-side CSMF 521 to use an NSaaS provided by the customer side NSMF 522.

The network-side NSSMF 523 is configured to instantiate an interface 507 and expose the interface 507 to enable the customer-side NSMF 522 to use network slice subnet-related capabilities provided by the NSSMF 523 in the form of the NSSaaS offering. Thus it may be said that the interface 507 between the network-side NSSMF 523 and the customer-side NSMF 522 and of the customer-side subslice customer (NSP) 530 constitutes an exposed interface.

The network-side InMF 524 is configured to instantiate interface 527 and expose interface 527 to enable the network-side NSSMF 523 to use an IaaS offering provided by the network-side InMF 524.

Turning now to FIG. 5D, there is shown a block diagram shown generally at 508 illustrating example network-side and customer-side MFs to offer an IaaS to a customer. The figure shows an infrastructure provider 550 on the network-side 502 and an NSP serving as an infrastructure customer 541, which may be the subslice provider 540, on the customer-side 501.

The infrastructure provider 550 comprises at least one network-side MF including without limitation, an InMF 524.

The customer side infrastructure customer 541 comprises at least one customer-side MF including without limitation, a CSMF 521 that provides with access to communication services, an NSMF 522 that is configured to instantiate interface 525 and expose interface 525 to enable the CSMF 521 to user an NSaaS offering provided by the NSMF 522 and an NSSMF 523 that is configured to instantiate interface 526 and expose interface 526 to enable NSMF 522 to use an NSSaaS offering provided by NSSMF 523.

The network side InMF 524 is configured to instantiate an interface 509 and expose the interface 506 to enable the customer-side NSSMF 523 to use infrastructure-related capabilities provided by the network-side InFM 524 in the form of the IaaS offering. Thus it may be said that the interface 507 between the network-side InMF 524 and the customer-side NSSMF 523 and of the customer-side infrastructure customer (NSP) 540 constitutes an exposed interface.

Aspects of the present disclosure provide techniques enabling 5G management entities to interact with legacy (non-5G) management entities to provide 5G management functionality. Specific examples, which may be understood by reference to FIG. 6, which shows the block diagram 500 of FIG. 5A in greater detail, may include any one or more of:

(1) CSMF 521—service management (SM), may use interface 612 for providing a vertical service instance slice (e.g. meter reading slice) to a (B)SM 611 of the CSC 510 such as without limitation, a vertical service operator (e.g., water department). Although the B(S)M 621 is shown in FIG. 6 as being separate from the CSMF 521, in some embodiments, the B(SM) may be co-located with the CSMF 521.

• • the (B)SM 621 of the CSP 520 (e.g. service instance provider) may provide at least one catalogue (not shown) to the (B)SM 611 of the CSC 510.
  • the (B)SM 611 of the CSC 510 may make a special request using the catalogue attributes and negotiate for a service level agreement (SLA) (not shown) with the CSP 520.
  • the (B)SM 621 of the CSP 520 can establish the vertical service slice and provide the mechanism (e.g. instructions and information) to use the slice. This mechanism includes:
  • the CSP 520 can send information including without limitation, the slice ID, a service ID (which may be specific to the slice) and/or an indication of the authentication mechanism to be used. This information may be used to identify the traffic (or traffic types) that are expected to be handled, additionally the information may include attributes that can be used in creating a PDU session by its end users.
  • data (performance, fault, loading, traffic volume) used by each PDU session created by the end user of the CSC 510 is provided to the CSC 510.

(2) NSMF 522 of the slice provider NSP 530-CSMF 521 of the CSP 520

• • available NSI types and attributes database can be provided to the CSMF 521 by the NSMF 522.
  • the CSMF 521 can send the network slice requirements to the NSMF 522 and negotiate for slice capabilities.
  • fill an attribute table—(list provided in the technical report) may include without limitation, the network slice type.
  • the NSMF 522 can send the slice type requested together with, without limitation, the slice ID, the authentication method, and how to access the MFs, how to configure the NFs, how to obtain performance management (PM) and/or fault management (FM) data, and/or how to do other lifecycle MFs on the 3rd party network slice provided to the CSMF 521.

(3) NSSMF 523 of the subslice provider 540—NSMF 522 of the subslice customer 530, which may in some examples be similar to (2) above, except that part of the network is managed by the 3rd party NSMF 522.

(4) NSMF 522 communication with a domain manager DM 632 (FIG. 6) and/or a MANO 432, via interface adaptation. In some embodiments, this may include mapping relationships between an NSSMF-exposed interface 526 and itf-n exposed interface and/or between an NSSMF-exposed interface 526 and Os-Ma-Nfvo interface.

(5) different architectures may make use of traditional or legacy and/or non-5G network management system components including without limitation, a network manager (NM) 631, a DM 632, and/or an EM 654 as well as the MANO 432. Those schemes may be used for different services based on the slice concept

• • the CSMF 521 may directly use the NM 631 as a management resource to manage the legacy network elements.
  • the NSSMF 523 can directly use the DM 643 and/or the EM 654 (directly or through the DM 632) to manage the 5G network elements.
  • the NSMF 522 can use the DM 632 and/or the EM 654 (directly or through the DM 632) and/or the MANO 432 as a notional NSSMF 623 using an appropriate interface adaptor 641, 642.

(6) An architecture for using infrastructure as a service for slicing part.

FIG. 6 is a more detailed version of the block diagram 500 of FIG. 5A, illustrating relationships between network-side MFs and a customer to support a CaaS offering.

In the example of FIG. 6, the CSC 510 is shown on the customer side 501 and may comprise a customer-side (B)SM 611, which may also be referred to as a customer's SM (SM(C)). The customer-side (B)SM 611 may be responsible for service-related management for one or more types of service. Specific responsibilities of the customer-side (B)SM 611 may include, without limitation, service negotiation with a customer providing details of services that can be offered; finalizing the SLA and providing business service requirements to the appropriate network-side MFs, typically by negotiations with a network-side (B)SM 621, which may also be referred to as a provider's SM (SM(P)), with which it is coupled and communicates 612, until an SLA is agreed to.

By contrast, the NMS on the network-side 502 is subdivided into a plurality of planes, including without limitation, a BSS plane 601, a service management plane 602 and a network management plane 603. The BSS plane 601 and the service management plane 602 lie on opposite sides of a notional boundary 604 therebetween and the service management plane 602 and the network management plane 603 lie on opposite sides of a notional boundary 605 therebetween.

The BSS 450 lies in the BSS plane 601 and is coupled to and communicates 623 with the network-side (B)SM 621 (in the service management plane 602) by which the BSS 450 may provide directions to the network-side (B)SM 621 in the context of the negotiations between the network-side (B)SM 621 and the customer-side (B)SM 611 to arrive at the SLA.

The network-side (B)SM 621 and the CSMF 521 lie in the service management plane 602. In some examples, the service management plane 602 may be subdivided by a notional boundary 606 separating the network-side (B)SM 621 and the CSMF 521. It will be appreciated that, in some examples, some of the functions attributed to the network-side CSMF 521 in the present disclosure may be moved across such notional boundary 606 to the network-side (B)SM 621 and/or vice versa.

The network-side (B)SM 621 is coupled to and communicates with the customer-side (B)SM 611 via an interface 612 to arrive at the SLA. Thus it may be said that the interface 612 between the network-side (B)SM 621 and the customer-side (B)SM 611 constitutes an exposed interface.

By way of non-limiting example, the interactions between the customer-side (B)SM 611 and the network side (B)SM 621 along the exposed interface 612 include the interfaces discussed below in detail under the heading “SM(C)-SM(P) EXPOSED INTERFACES” and may include, without limitation, a template management interface, a service requirement management interface and/or a service management interface as discussed therein.

Additionally, the network-side (B)SM 621 is coupled to and communicates 622 with the CSMF 521 to provide orders to the CSMF 521 in accordance with the terms of the SLA, once negotiated, for the CaaS offering 503. Thus it may be said that the interface 622 between the network-side (B)SM 621 and the CSMF 521 constitutes an exposed interface.

By way of non-limiting example, the interactions between the network-side (B)SM 621 and the CSMF 521 along the exposed interface 622 include the interfaces discussed below in detail under the heading “SM-CSMF EXPOSED INTERFACES” and may include, without limitation, a template management interface, a service requirement management interface, a network resource management interface, a service management interface and/or a communication service instance (CSI) lifecycle management (LM) interface as discussed therein.

The network-side (B)SM 621 is coupled to and communicates 623 with the BSS 450 to receive directions therefrom in the context of the negotiations between it and the customer-side (B)SM 611 to arrive at the SLA.

The CSMF 521 is coupled to and provides the CaaS offering 503 to the CSC 510 in accordance with the terms of the SLA once negotiated, and is coupled to and communicates 525 with the NSMF 522 (in the 5G part of the network management plane 603) to obtain access to network slice-related capabilities therefrom. In addition, the CSMF 521 is coupled to and communicates 625 with a legacy (non-5G) NM 631 (in the non-5G part of the network management plane 603), that may be considered to be part of a legacy OSS 630, to obtain access to non-5G network capabilities therefrom in a manner similar to the network slice-related capabilities it receives from the NSMF 522, but in a non-5G context, to manage legacy EMs 654 and/or legacy DMs 632 (and thus indirectly manage and/or interact with other legacy EMs 654).

All remaining network-side MFs reside in the network management plane 603. These include without limitation, the NSMF 522, the NSSMF 523, the NM 631, interface adaptors 641, 642, the associated EMs 654 and/or DMs 643 and/or the MANO 432. As discussed above, in some examples, the NMS 502 may also be subdivided into 5G network components and legacy or non-5G components. In FIG. 6 this notional subdivision is shown by notional boundary 607.

The NSMF 522 is coupled to and communicates 525 with the CSMF 521 to provide access to network slice-related capabilities and is coupled to and communicates 526 with the NSSMF 523 to obtain access to network slice subnet-related capabilities therefrom. Additionally in some examples, the NSMF 522 may be coupled to and communicate 526 with interface adaptor 641 in order to manage and/or interact with a legacy EM 454 and/or a legacy DM 632 (and thus indirectly manage other legacy EMs 654). Further, in some examples, the NSMF 522 may be coupled to and communicate 526 with interface adaptor 642 in order to manage and/or interact with a MANO 432.

The NSSMF 523 is coupled to and communicates 526 with the NSMF 522 to provide access to network slice subnet-related capabilities. Additionally in some examples, the NSSMF 522 may be coupled to and communicate with a legacy EM 654 to manage and/or interact with it and/or with a legacy DM 632 to manage and/or interact with it (and thus indirectly manage and/or interact with other legacy EMs 654) along an itf-n interface.

The interface adaptor 641 is coupled to and communicates 526 with the NSMF 522 and with a legacy EM 654 and/or a legacy DM 632 along an itf-n interface to allow the NSMF 522 to manage and/or interact with them (and through the DM 632, to indirectly manage and/or interact with other legacy EMs 654) by implementing the functionality of a notional NSSMF 623 through performing interface conversion functions. Thus it may be said that the interface adaptor 641 between the NSMF 522 and the legacy EM 654 and/or legacy DM 632 (and thus, indirectly other legacy EMs 654) constitutes an exposed interface.

By way of non-limiting example the interactions between the NSMF 522 and the legacy EM 654 and/or legacy DM 632 (and thus, indirectly other legacy EMs 654) along the exposed interface adaptor 641 include the interface discussed below in detail under the heading “Nsmf-nssmf to itf-n” and may include without limitation, an NSSI LM interface to Generic/Commin Interface IRPs, an NSSI LM interface to CM related Interface IRPs, an NSSI LM interface to Son related Interface IRPs, an NSSI PM interface to PM file format/collection & Trace relate Interface IRPs and/or an NSSI FM interface to FM related Interface IRPs as discussed therein.

The interface adaptor 642 is coupled to and communicates 526 with the NSMF 522 and with the MANO 432 along an Os-Ma-nfvo interface to allow the NSMF 522 to manage and/or interact with the MANO 432 by implementing the functionality of a notional NSSMF 623 through performing interface conversion functions. Thus it may be said that the interface adaptor 642 between the NSMF 522 and the MANO 432 constitutes an exposed interface.

By way of non-limiting example the interactions between the NSMF 522 and the MANO 432 along the interface adaptor 642 include the interface discussed below in detail under the heading “Nsmf-nssmf to Os-Ma-Nfvo” and may include without limitation, an NSST, SERVICEREQUIRE management interface to NSD interface, an NSSI LM interface to NS LM interface, an NSSI PM interface to NS PM interface and/or an NSSI FM interface to NS FM interface as discussed therein.

The NM 631 is coupled to and communicates 625 with the CSMF 521 and with a legacy EM 654 and/or a legacy DM 632 along an itf-n interface to allow the CSMF 521 to manage and interact with them (and through the DM 632, to indirectly manage and/or interact with other legacy EMs 654.

It should be understood that in many implementations, the resources under the management of the NSMF 522 may have been obtained from different infrastructure or resource providers. Each of these resource providers may have a different management mechanism. The resources may have been provided to a service provider in the form of a network slice. When an NSMF 522 interacts with a resource, it may do so through an NSSMF 523, 623, through a DM 632 or through a MANO 432. Different resources may be accessible through one of the available interfaces. Some resources may be available through more than one of the interfaces, while others are available through only one of the interfaces. Thus, when sending an instruction or configuration information, the NSMF 522 may select one of a plurality of interfaces in accordance with the nature of the interaction and in accordance with the resource with which it is to communicate.

It should also be understood that where an interface is illustrated between the NSMF 522 and either the DM 632 or the MANO 432, in some embodiments the interface adaptors 641, 642 (which may be used as a translation between defined Application Program Interfaces (APIs)), may be integrated in one or both of the sides of the communication. For example, in some embodiments, an NSMF 522 may be configured so that it does not need an external interface to communicate with a particular DM 632, while it may need an interface to communicate with a MANO 432 (or even with a different DM 632). The modifications to allow an NSMF 522 and DM 632 (or an NSMF 522 and a MANO 432) to communicate with each other can be implemented in one or both of the entities. This allows for the NSMF 522 to be modified so that it can interact with any MANO 432, or it may allow for both the NSMF 522 and MANO 432 to be configured to communicate without an interface. Those skilled in the art will appreciate that this may be considered as the incorporation of the interface in one or both of the functional entities.

FIG. 7 is a more detailed version of the block diagram 504 of FIG. 5B illustrating relationships between customer-side and network-side MFs to support an NSaaS offering 505.

In FIG. 7, there may or may not be a network-side CSMF 521 (shown in dashed outline) in the service management plane 602 but if there is, it is not involved in the provision of the NSaaS offering 505.

Thus, as in FIG. 6, the network-side (B)SM 621 is coupled to and communicates 612 with the customer-side (B)SM 611 to arrive at the SLA and is coupled to and communicates 623 with the BSS 450 to receive directions therefrom in the context of the negotiations between it and the customer-side (B)SM 611 to arrive at the SLA. However, rather than being coupled to and communicating with the network-side CSMF 521 (if any), it is coupled to and communicates 722 with the NSMF 522 to provide orders to the NSMF 522 in accordance with the terms of the SLA, once negotiated, for the NSaaS offering 505.

In this example, after negotiation 612 between customer-side and network-side (B)SMs 611, 621, the NSMF 522 can provide the MF of a Network Slice Instance (NSI) to the customer-side CSMF 521 so that the CSP 520 can use the provided NSI to support a communication service.

The NSMF 522 is coupled to and provides the NSaaS offering 505 to the customer-side CSMF 521 of the CSP 20 in accordance with the terms of the SLA once negotiated.

By way of non-limiting example, the interactions between the network-side NSMF 522 and the customer-side CSMF 521 along the exposed interface 505 include the interfaces discussed below in detail under the heading “CSMF-NSMF EXPOSED INTERFACES” and may include, without limitation, a network service template (NST) management interface (which may comprise, without limitation, a template management interface, a network requirement management interface and/or a network resource management interface), an NSI LM interface, an NSI lifecycle change notification interface, an NSI performance management (PM) interface, an NSI fault management (FM) interface and/or a network slice subnet template (NSST) management interface as discussed therein. In some examples, the NSI lifecycle change notification interface, the NSI PM interface, the NSI FM interface may use or be substantially similar to the interface discussed below in detail under the heading <specify> and entitled “Query Service Interface”. In some examples, the NSST manage interface may be substantially similar to the interface discussed below in detail under the heading “NSSI-NSSMF EXPOSED INTERFACES” and entitled “NSST Management Interface”.

Further, the NSMF 522 is coupled to and communicates 526 with the NSSMF 523 to obtain access to network slice subnet-related capabilities therefrom. Additionally in some examples, the NSMF 522 may be coupled to and communicate 526 with interface adaptor 641 in order to manage and/or interact with a legacy EM 454 and/or a legacy DM 632 (and thus indirectly manage other legacy EMs 654). Further, in some examples, the NSMF 522 may be coupled to and communicate 526 with interface adaptor 642 in order to manage and/or interact with a MANO 432.

The NSSMF 523 is coupled to and communicates 526 with the NSMF 522 to provide access to network slice subnet-related capabilities. Additionally in some examples, the NSSMF 522 may be coupled to and communicate with a legacy EM 654 to manage and/or interact with it and/or with a legacy DM 632 to manage and/or interact with it (and thus indirectly manage and/or interact with other legacy EMs 654) along an itf-n interface.

The interface 641 is coupled to and communicates 526 with the NSMF 522 and with a legacy EM 654 and/or a legacy DM 632 along an itf-n interface to allow the NSMF 522 to manage and/or interact with them (and through the DM 632, to indirectly manage and/or interact with other legacy EMs 654) by implementing the functionality of a notional NSSMF 623 through performing interface conversion functions.

The interface adaptor 642 is coupled to and communicates 526 with the NSMF 522 and with the MANO 432 along an Os-Ma-nfvo interface to allow the NSMF 522 to manage and/or interact with the MANO 432 by implementing the functionality of a notional NSSMF 623 through performing interface conversion functions.

FIG. 8 is a more detailed version of the block diagram 506 of FIG. 5C illustrating relationships between customer-side and network-side MFs to support at least one NSaaS offering 507.

In FIG. 8, there may or may not be a network-side CSMF 521 (shown in dashed outline) in the service management plane 602 but if there is, it is not involved in the provision of the at least one NSSaaS offering 507.

Similarly, there may or may not be a network-side NSMF 522 (shown in dashed outline) in the network management plane 603 but if there is, it is not involved in the provision of the at least one NSSaaS offering 507.

Thus, as in FIGS. 6 and 7, the network-side (B)SM 621 is coupled to and communicates 612 with the customer-side (B)SM 611 to arrive at the SLA and is coupled to and communicates 623 with the BSS 450 to receive directions therefrom in the context of the negotiations between it and the customer-side (B)SM 611 to arrive at the SLA. However, rather than being coupled to and communicating with the network-side CSMF 521 (if any) or with the network-side NSMF 522 (if any), it is coupled to and communicates 822 with the NSSMF(s) 523 and/or virtual NSSMF(s) 623 to provide orders to the (virtual) NSSMF(s) 523, 623 in accordance with the terms of the SLA, once negotiated, for the at least one NSSaaS offering 507.

In this example, after negotiation 612 between customer-side and network-side (B)SMs 611, 621, a (virtual) NSSMF 523, 623 can provide the MF of a Network Slice Subnet Instance (NSSI) to the customer-side NSMF 522 so that the subslice customer (NSP) 530 can use the provided NSSI to form a network slice that may be used to support communication service.

The NSSMF 523 is coupled to and provides an NSSaaS offering 507 to the customer-side NSMF 522 of the subslice customer (NSP) 530 in accordance with the terms of the SLA once negotiated.

By way of non-limiting example, the interactions between the network-side NSSMF 523 and the customer-side NSMF 521 along the exposed interface 507 include the interfaces discussed below in detail under the heading “NSMF-NSSMF EXPOSED INTERFACES” and may include, without limitation, a network subnet service template (NSST) management interface (which may comprise, without limitation, an NSST management interface a network requirement management interface and/or a network resource management interface), an NSSI LM interface, an NSSI lifecycle change notification interface, an NSSI PM interface and/or an NSSI FM interface as discussed therein. In some examples, the NSSI lifecycle change notification interface, the NSSI PM interface and/or the NSSI FM interface may be substantially similar to respectively, the NSI lifecycle change notification interface, the NSSI PM interface and the NSSI FM interface.

Further, in some examples, the NSSMF 522 may be coupled to and communicate with a legacy EM 654 to manage and/or interact with it and/or with a legacy DM 632 to manage and/or interact with it (and thus indirectly manage and/or interact with other legacy EMs 654) along an itf-n interface.

The interface adaptor 641 is coupled to and provides an NSSaaS offering 507 to the customer-side NSMF 522 of the subslice customer (NSP) 530 in accordance with the terms of the SLA once negotiated. Additionally, the interface adaptor 641 is coupled to and communicates with a legacy EM 654 and/or a legacy DM 632 along an itf-n interface to implement the functionality of a notional NSSMF 623 through performing interface conversion functions and thus allow the customer-side NSMF 522 to manage and/or interact with them (and through the DM 632, to indirectly manage and/or interact with other legacy EMs 654).

The interface adaptor 642 is coupled to and provides an NSSaaS offering 507 to the customer-side NSMF 522 of the subslice customer (NSP) 530 in accordance with the terms of the SLA once negotiated. Additionally the interface adaptor 642 is coupled to and communicates with the MANO 432 along an Os-Ma-nfvo interface to implement the functionality of a notional NSSMF 623 through performing interface conversion functions and thus allow the customer-side NSMF 522 to manage and/or interact with the MANO 432.

FIG. 9 is a more detailed version of the block diagram 509 of FIG. 5D illustrating relationships between customer-side and network-side MFs to support at least one IaaS offering 509.

In FIG. 9, there may or may not be a network-side CSMF 521 (shown in dashed outline) in the service management plane 602 but if there is, it is not involved in the provision of the at least one IaaS offering 508.

Similarly, there may or may not be a network-side NSMF 522 and/or network-side NSSMF 523 (shown in dashed outline) in the network management plane 603 but if there is, they are not involved in the provision of the at least one IaaS offering 509.

Thus, as in FIGS. 6-8, the network-side (B)SM 621 is coupled to and communicates 612 with the customer-side (B)SM 611 to arrive at the SLA and is coupled to and communicates 623 with the BSS 450 to receive directions therefrom in the context of the negotiations between it and the customer-side (B)SM 611 to arrive at the SLA. However, rather than being coupled to and communicating with the network-side CSMF 521 (if any), with the network-side NSMF 522 (if any), or with the network-side NSSMF 523 (if any), it is coupled to and communicates 922 with the interface adaptor 641 and/or the interface adaptor 642 to provide orders to the legacy EMs 654 and/or the legacy DMs 632 (and thus indirectly to other legacy EMs 654) in accordance with the terms of the SLA, once negotiated, for the at least one IaaS offering 509.

In this example, after negotiation 612 between customer-side and network-side (B)SMs 611, 621, network management entities, including without limitation, interface adaptor 641, interface adaptor 642, a legacy EM 654 and/or a legacy DM 643 (and thus indirectly, other legacy EMs 654) used for managing different network infrastructure can provide the MF of the infrastructure to corresponding customer-side MFs of the infrastructure customer (NSP) 540, which may include, without limitation an NSSMF 523 and/or a legacy NM 631, so that the infrastructure customer (NSP) 540 can use the provided network infrastructure to form an NSSI and/or an NSI that may be used to support communication service.

The interface adaptor 641 is coupled to and provides an IaaS offering 509 to the customer-side NSSMF 523 of the infrastructure customer (NSP) 540 in accordance with the terms of the SLA once negotiated. Additionally, the interface adaptor 641 is coupled to and communicates with a legacy EM 654 and/or a legacy DM 632 along an itf-n interface to implement the functionality of a notional NSSMF 623 through performing interface conversion functions and thus allow the customer-side NNSMF 523 to manage and/or interact with them (and through the DM 632, to indirectly manage and/or interact with other legacy EMs 654).

The interface adaptor 642 is coupled to and provides an IaaS offering 509 to the customer-side NSSMF 523 of the infrastructure customer (NSP) 540 in accordance with the terms of the SLA once negotiated. Additionally the interface adaptor 642 is coupled to and communicates with the MANO 432 along an Os-Ma-nfvo interface to implement the functionality of a notional NSSMF 623 through performing interface conversion functions and thus allow the customer-side NSMF 522 to manage and/or interact with the MANO 432.

In some examples, a legacy EM 654 and/or a legacy DM 632 (and thus, indirectly other legacy EMs 654) may be coupled to and provide an IaaS offering 509 to the customer-side legacy NM 631 of the infrastructure customer (NSP) 540 in accordance with the terms of the SLA once negotiated.

Method Actions

Turning now to FIG. 10, there is shown a flow chart, shown generally at 1000, showing example actions taken by a network MF of a telecommunication service provider to provide telecommunication communication services to a customer.

One example action 1010 is to receive an order in accordance with an agreement as to terms of a telecommunications service offering.

One example action 1020 is to access network resources that satisfy the terms of the service offering.

One example action 1030 is to initialize an instance of the service offering using the resources accessible thereby.

One example action 1040 is to create at least one interface by which the telecommunications service offering is made available to the customer.

One example action 1050 is to expose each of the at least one created interfaces to enable an MF of the customer to use the telecommunications service offering.

An advantage of this arrangement is that improves the functionality of non-5G management functional entities and provides a migration path for upgrading legacy networks to comply with 5G standards.

According to a broad aspect of the present disclosure, there is disclosed a network management system configured to: receive a request for a service, the request including service requirements, wherein the service comprises a selected one of: Communication as a Service (CaaS), Network Slice as a Service (NSaaS), Network Slice Subnet as a Service (NSSaaS), and Infrastructure as a Service (IaaS); and interact with one or more non-5G management entities to: configure network resources to satisfy the service requirements; and initialize a service instance using the configured network resources.

SM(C)-SM(P) Exposed Interfaces (612)

These interfaces relate to interactions between a Customer's Service Manager (SM(C)), and a Provider's Service Manager (SM(P))

Template Management Interface

This interface allows the management of templates. The following operations are defined for this interface. The MFs using this interface are the SM of both customer-side and the network-side shown in FIGS. 6-8. In some embodiments, the MFs using this interface can be any MFs described in FIG. 5.

• • Template Retrieve;
  • On-board Template;
  • Update Template;
  • Delete Template;

Template Retrieve

Message          Direction
TemplateRequest  SM (Customer) -> SM (Provider)
TemplateResponse SM (Provider) -> SM (Customer)

Input Parameters

Parameter    Description
templateType Specifies the type of template that is requested. This
             parameter can Indicate any one of: Communication
             Service Template (CST), Network Slice Instance
             Template (NST), or Network Slice Subnet Instance
             (NSST)

Output Parameters

Parameter Description
Template  Contains content data of the requested CST, NST or NSST.

On-Board Template

Message                 Direction
OnboardTemplateRequest  SM (Customer) -> SM (Provider)
OnboardTemplateResponse SM (Provider) -> SM (Customer)

Input Parameters

Parameter Description
Template  As above

Output Parameters

Parameter    Description
TemplateInfo Acknowledgment indicating success (ACK) or failure
             (NACK).

Service Requirement Management Interface

This interface allows the management of Service Requirements. The following operations are defined for this interface. The MFs using this interface are the SM of both customer-side and network-side shown in FIGS. 6-8. In some embodiments, the MFs using this interface can be any MFs described in FIG. 5.

• • Query Service Capability;
    • By using it, the network MFs can have the capacity information of the services.
  • Initiate Service Requirement;
    • By using it, the network MFs of the customer can send the service requirements to the service providers.
  • Negotiate Service Requirement;
    • By using it, the network MFs of the customer can send the negotiation message of service requirements to the service providers.
  • Update Service Requirement;
    • By using it, the network MFs of the customer can update the service requirements to the service providers.

Query Service Capability

Message                       Direction
QueryServiceCapabilityRequest SM (Customer) -> SM (Provider)
QueryCapabilityResponse       SM (Provider) -> SM (Customer)

Input Parameters

Parameter                     Description
QueryServiceCapabilityRequest An Identifier of Service that is
                              requested, or for which Capability is
                              requested.

Output Parameters

Parameter         Description
serviceCapability A list of services and their respective capability/
                  capacity

Initiate Service Requirement

Message                          Direction
initiateServiceRequirement Request SM (Customer) -> SM (Provider)
initiateServiceRequireResponse   SM (Provider) -> SM (Customer)

Input Parameters

Parameter      Description
serviceRequire An identification of a Service Requirement.

Output Parameters

Parameter             Description
ServiceRequireResults If successful, ACK with the ID of the agreed
                      Service Requirement. Otherwise, NACK

Negotiate Service Requirement

Message                         Direction
negotiateServiceRequireRequest  SM (Customer) -> SM (Provider)
negotiateServiceRequireResponse SM (Provider) -> SM (Customer)

Input Parameters

Parameter      Description
ServiceRequire Data defining a Service requirement.

Output Parameters

Parameter             Description
ServiceRequireResults If successful, ACK with the ID of the agreed
                      Service Requirement. Otherwise, NACK

Update Service Requirement

Message                      Direction
updateServiceRequireRequest  SM (Customer) -> SM (Provider)
updateServiceRequireResponse SM (Provider) -> SM (Customer)

Input Parameters

Parameter        Description
serviceRequireID An Identifier of the Service Requirement that needs
                 to be updated.
ServiceRequire   Data defining a Service Requirement

Output Parameters

Parameter                   Description
updateServiceRequireResults If successful, ACK with the ID of the
                            agreed Service Requirement. Otherwise,
                            NACK

Service Management Interface

This interface facilitates the management of a service. The following operations are defined for this interface. The MFs using this interfaces are the SM of both customer-side and network-side shown in FIGS. 6-8. In some embodiments, the MFs using this interface can be any MFs described in FIG. 5.

• • Instantiate service;
  • Activate service;
  • Deactivate service;
  • Query Service
  • Modify service;
  • Terminate service;

Instantiate Service

Message                    Direction
instantiateServiceRequest  SM (Customer) -> SM (Provider)
instantiateServiceResponse SM (Provider) -> SM (Customer)

Input Parameters

Parameter              Description
serviceRequireID       An Identifier of the Service Requirement that
                       needs to be updated.
instantiateServiceTime Timestamp indicating the instantiate time of the
                       service. For example, the service may be
                       instantiated at this timestamp.

Output Parameters

Parameter Description
serviceID An Identifier of the service that has been created.
csiID     An Identifier of an associated CSI

Activate Service

Message                 Direction
activateServiceRequest  SM (Customer) -> SM (Provider)
activateServiceResponse SM (Provider) -> SM (Customer)

Input Parameters

Parameter           Description
serviceID           An Identifier of the Service Requirement that
                    needs to be activated.
activateServiceTime Timestamp indicating the activate time of the
                    service. For example, the service may be activated
                    at this timestamp.
csiID               An Identifier of an associated CSI

Output Parameters

Parameter                      Description
lifecycleOperationOccurrenceID An Identifier of the of the service
                               operation occurrence

Deactivate Service

Message                   Direction
deactivateServiceRequest  SM (Customer) -> SM (Provider)
deactivateServiceResponse SM (Provider) -> SM (Customer)

Input Parameters

Parameter             Description
serviceID             An Identifier of the Service Requirement that
                      needs to be deactivated.
deactivateServiceTime Timestamp indicating the deactivate time of the
                      service. For example, the service may be
                      deactivated at this timestamp.
csiID                 An Identifier of an associated CSI

Query Service

Message              Direction
QueryServiceRequest  SM (Customer) -> SM (Provider)
QueryServiceResponse SM (Provider) -> SM (Customer)

Input Parameters

Parameter         Description
serviceID         An Identifier of the Service Requirement to which the
                  query applies.
csiID             An Identifier of an associated CSI
filter            Filter defining the services to which the query applies,
                  based on attributes of the NSI.
attributeSelector a list of attribute names of NSI. If present, these
                  attributes may be returned for the instances of NSI
                  matching the filter.
                  In some embodiments, if this parameter is omitted, the
                  complete list of attributes for the instances of NSI
                  matching the filter may be returned

Output Parameters

Parameter          Description
queryServiceResult Information on service(s) that match the input filter..
queryCsiResult     Information on CSI(s) that match the input filter.

Modify Service

Message               Direction
modifyServiceRequest  SM (Customer) -> SM (Provider)
modifyServiceResponse SM (Provider) -> SM (Customer)

Input Parameters

Parameter         Description
serviceID         An Identifier of the service to which the request
                  applies.
csiID             An Identifier of an associated CSI
serviceRequireID  Identifier of the Service Requirement that needs to
                  be used
modifyType        Specifies the type of update. This parameter
                  determines also which one of the following
                  parameter is present in the operation. Possible
                  values include:
                  AddNssi (adding existing NSSIs),
                  RemoveNssi (removing NSSI),
                  InstantiateNssi (instantiating new NSSI(s)),
                  OperateNssi (changing NSSI state),
                  ChangeExtNssiConnectivity (changing the
                  external connectivity of NSSI).
                  AssocNewNstVersion (associating a new NST
                  version to the NS instance),
                  MoveNssi (moving NSSI instance(s) from one
                  origin NSI to another target NSI),
                  ChangeNsiDf (changing NSI DF)
modifyServiceData According to the modifyType
modifyServiceTime Timestamp indicating the modify time of the
                  service. For example, the service may be modified
                  at this timestamp.

Output Parameters

Parameter                      Description
lifecycleOperationOccurrenceID An Identifier of the service operation
                               occurrence

Terminate Service

Message                  Direction
terminateServiceRequest  SM (Customer) -> SM (Provider)
terminateServiceResponse SM (Provider) -> SM (Customer)

Input Parameters

Parameter            Description
serviceID            An Identifier of the Service Requirement that
                     needs to be terminated.
terminateServiceTime Timestamp indicating the terminate time of the
                     service. For example, the service may be
                     terminated at this timestamp.
csiID                An Identifier of an associated CSI

SM-CSMF Exposed Interfaces

Template Management Interface

This interface enables the management of templates. The following operations are defined for this interface. This is the interface 622 between (B)SM 621-CSMF 521. In some embodiments, interface 503 is the same as interface 622, and B(SM) 621 can be B(SM) 611. This interface is used to manage the CSI.

• • Template retrieve;
  • On-board Template;
  • Update Template;
  • Delete Template;

Template Retrieve

Message          Direction
TemplateRequest  SM -> CSMF
TemplateResponse CSMF -> SM

Input Parameters

Parameter    Description
templateType Specifies the type of template that is
             requested. This parameter can Indicate
             any one of: Communication Service
             Template (CST), Network Slice
             Instance Template (NST), or Network
             Slice Subnet Instance (NSST)

Output Parameters

Parameter Description
Template  Contains content data of the
          requested CST, NST or NSST.

On-Board Template

Message                 Direction
OnboardTemplateRequest  SM −> CSMF
OnboardTemplateResponse CSMF −> SM

Input Parameters

Parameter Description
Template  As above

Output Parameters

Parameter    Description
TemplateInfo Acknowledgment indicating
             success (ACK) or failure (NACK).

Service Requirement Management Interface

This interface allows the management of Service Requirements. The following operations are defined for this interface

• • Query Service Capability;
  • Initiate Service Requirement;
  • Negotiate Service Requirement;
  • Update Service Requirement;

Query Service Capability

Message                       Direction
QueryServiceCapabilityRequest SM −> CSMF
QueryCapabilityResponse       CSMF −> SM

Input Parameters

Parameter                     Description
QueryServiceCapabilityRequest An Identifier of Service
                              that is requested, or for which
                              Capability is requested.

Output Parameters

Parameter         Description
serviceCapability A list of services and their
                  respective capability/capacity

Initiate Service Requirement (Admission Control)

Message                          Direction
initiateServiceRequirement Request SM −> CSMF
initiateServiceRequireResponse   CSMF −> SM

Input Parameters

Parameter      Description
serviceRequire An identification of
               a Service Requirement.

Output Parameters

Parameter             Description
ServiceRequireResults If successful, ACK with
                      the ID of the agreed Service
                      Requirement. Otherwise, NACK

Negotiate Service Requirement

Message                         Direction
negotiateServiceRequireRequest  SM −> CSMF
negotiateServiceRequireResponse CSMF −> SM

Input Parameters

Parameter      Description
ServiceRequire Data defining a
               Service requirement.

Output Parameters

Parameter             Description
ServiceRequireResults If successful, ACK with the
                      ID of the agreed Service
                      Requirement. Otherwise,
                      NACK

Update Service Requirement

Message                      Direction
updateServiceRequireRequest  SM −> CSMF
updateServiceRequireResponse CSMF −> SM

Input Parameters

Parameter        Description
serviceRequireID An Identifier of the Service
                 Requirement that needs to be
                 updated.
ServiceRequire   Data defining a Service
                 Requirement

Output Parameters

Parameter                   Description
updateServiceRequireResults If successful, ACK with
                            the ID of the agreed Service
                            Requirement. Otherwise, NACK

Network Resource Management Interface

This interface allows the management of Network Resources. The following operations are defined for this interface. The MFs using this interfaces are SM and CSMF of both customer-side and network-side shown in FIGS. 6-8. In some embodiments, the MFs using this interface can be any MFs described in FIG. 5.

• • Query network resource;

Query Network Resource

Message                      Direction
queryNetworkResourceRequest  SM −> CSMF
queryNetworkResourceResponse CSMF −> SM

Input Parameters

Parameter         Description
filter            Filter defining the network resource
                  to which the query applies
attributeSelector a list of attribute names of network
                  resource. If present, these attributes
                  may be returned for the instances of
                  network resources matching the filter.
                  In some embodiments, if this parameter
                  is omitted, the complete list of attributes
                  for the instances of network resources
                  matching the filter may be returned

Output Parameters

Parameter           Description
networkResourceData List the network resources
                    with capability

Service Management Interface

This interface facilitates the management of a service. The following operations are defined for this interface

• • Instantiate service;
  • Activate service;
  • Deactivate service;
  • Query Service
  • Modify service;
  • Terminate service;

Instantiate Service

Message                    Direction
instantiateServiceRequest  SM −> CSMF
instantiateServiceResponse CSMF −> SM

Input Parameters

Parameter              Description
serviceRequireID       An Identifier of the Service
                       Requirement that needs to be
                       updated.
instantiateServiceTime Timestamp indicating the
                       instantiate time of the service.
                       For example, the service may be
                       instantiated at this timestamp.

Output Parameters

Parameter Description
serviceID An Identifier of the service
          that has been created.
csiID     An Identifier of an associated CSI

Activate Service

Message                 Direction
activateServiceRequest  SM −> CSMF
activateServiceResponse CSMF −> SM

Input Parameters

Parameter           Description
serviceID           An Identifier of the Service
                    Requirement that needs to be
                    activated.
activateServiceTime Timestamp indicating the activate
                    time of the service. For example, the
                    service may be activated at this timestamp.
csiID               An Identifier of an associated CSI

Output Parameters

Parameter                      Description
lifecycleOperationOccurrenceID An Identifier of the of the
                               service operation occurrence

Deactivate Service

Message                   Direction
deactivateServiceRequest  SM −> CSMF
deactivateServiceResponse CSMF −> SM

Input Parameters

Parameter             Description
serviceID             An Identifier of the Service
                      Requirement that needs to be
                      deactivated.
deactivateServiceTime Timestamp indicating the deactivate
                      time of the service. For example,
                      the service may be deactivated
                      at this timestamp.
csiID                 An Identifier of an associated CSI

Query Service

Message              Direction
QueryServiceRequest  SM −> CSMF
QueryServiceResponse CSMF −> SM

Input Parameters

Parameter         Description
serviceID         An Identifier of the Service Requirement
                  to which the query applies.
csiID             An Identifier of an associated CSI
filter            Filter defining the services to which the
                  query applies, based on attributes
                  of the NSI.
attributeSelector a list of attribute names of NSI. If present,
                  these attributes may be returned for
                  the instances of NSI matching the filter.
                  In some embodiments, if this parameter
                  is omitted, the complete list of
                  attributes for the instances of NSI
                  matching the filter may be returned

Output Parameters

Parameter          Description
queryServiceResult Information on service(s)
                   that match the input filter.
queryCsiResult     Information on CSI(s) that
                   match the input filter.

Modify Service

Message               Direction
modifyServiceRequest  SM −> CSMF
modifyServiceResponse CSMF −> SM

Input Parameters

Parameter         Description
serviceID         An Identifier of the service to which the
                  request applies.
csiID             An Identifier of an associated CSI
serviceRequireID  Identifier of the Service Requirement
                  that needs to be used
modifyType        Specifies the type of update. This parameter
                  determines also which one of the following
                  parameter is present in the
                  operation. Possible values include:
                  AddNssi (adding existing NSSIs),
                  RemoveNssi (removing NSSI),
                  InstantiateNssi (instantiating new NSSI(s)),
                  OperateNssi (changing NSSI state),
                  ChangeExtNssiConnectivity (changing the
                  external connectivity of NSSI).
                  AddCsiSap (adding SAP(s)),
                  RemoveCsiSap (removing SAP(s)),
                  AssocNewNstVersion (associating a new NST
                  version to the NS instance),
                  MoveNssi (moving NSSI instance(s) from
                  one origin NSI to another
                  target NSI),
                  ChangeNsiDf (changing NSI DF)
modifyServiceData According to the modifyType
modifyServiceTime Timestamp indicating the modify time of
                  the service. For example, the service
                  may be modified at this timestamp.

Output Parameters

Parameter                      Description
lifecycleOperationOccurrenceID An Identifier of the service
                               operation occurrence

Terminate Service

Message                  Direction
terminateServiceRequest  SM −> CSMF
terminateServiceResponse CSMF −> SM

Input Parameters

Parameter            Description
serviceID            An Identifier of the Service Requirement
                     that needs to be terminated.
terminateServiceTime Timestamp indicating the terminate
                     time of the service. For example, the
                     service may be terminated at this
                     timestamp.
csiID                An Identifier of an associated CSI

CSI LM Interface (503)

This interface allows the management of service. The following operations are defined for this interface

• • Instantiate CSI;
  • Activate CSI;
  • Deactivate CSI;
  • Modify CSI;
  • Query CSI;
  • Terminate CSI;

Instantiate CSI

Message                Direction
instantiateCsiRequest  SM −> CSMF
instantiateCsiResponse CSMF −> SM

Input Parameters

Parameter          Description
CstID              An Identifier of the CST
                   that needs to be used.
instantiateCstTime Timestamp indicating the
                   instantiate time of the CSI. For
                   example, the CSI may be
                   instantiated at this timestamp.

Output Parameters

Parameter Description
csiID     An Identifier of the CSI

Activate Service

Message             Direction
activateCsiRequest  SM −> CSMF
activateCsiResponse CSMF −> SM

Input Parameters

Parameter       Description
CsiD            An Identifier of the CSI that
                needs to be activated.
activateCsiTime Timestamp indicating the
                activate time of the service.
                For example, the service may
                be activated at this timestamp.

Output Parameters

Parameter                        Description
CsilifecycleOperationOccurrenceID An Identifier of the
                                 of the CSI operation
                                 occurrence

Deactivate CSI

Message               Direction
deactivateCsiRequest  SM −> CSMF
deactivateCsiResponse CSMF −> SM

Input Parameters

Parameter         Description
CsiID             An Identifier of the CSI that
                  needs to be deactivated.
deactivateCsiTime Timestamp indicating the
                  deactivate time of the CSI. For
                  example, the CSI may be deactivated
                  at this timestamp.
csiID             An Identifier of an associated CSI

Query CSI

Message          Direction
QueryCsiRequest  SM −> CSMF
QueryCsiResponse CSMF −> SM

Input Parameters

Parameter         Description
serviceID         An Identifier of the Service Requirement to
                  which the query applies.
csiID             An Identifier of an associated CSI
filter            Filter defining the services to which the query
                  applies, based on attributes of the NSI.
attributeSelector a list of attribute names of CSI. If present, these
                  attributes may be returned for the instances of
                  CSI matching the filter. In some embodiments,
                  if this parameter is omitted, the complete list of
                  attributes for the instances of CSI matching the
                  filter may be returned

Output Parameters

Parameter      Description
queryCsiResult Information on CSI(s) that
               match the input filter.

Modify CSI

Message           Direction
modifyCsiRequest  SM -> CSMF
modifyCsiResponse CSMF -> SM

Input Parameters

Parameter        Description
csiID            An Identifier of an associated CSI
cstID            An Identifier of the CST that needs to be used
serviceRequireID Identifier of the Service Requirement that
                 needs to be used
modifyCsiType    Specifies the type of update. This parameter
                 determines also which one of the following
                 parameter is present in the operation. Possible
                 values include:
                 AddNssi (adding existing NSSIs),
                 RemoveNssi (removing NSSI),
                 InstantiateNssi (instantiating new NSSI(s)),
                 OperateNssi (changing NSSI state),
                 ChangeExtNssiConnectivity (changing the
                 external connectivity of NSSI).
                 AddNsiSap (adding SAP(s)),
                 RemoveNsiSap (removing SAP(s)),
                 AssocNewNstVersion (associating a new
                 NST version to the NS instance),
                 MoveNssi (moving NSSI instance(s) from
                 one origin NSI to another target NSI),
                 ChangeNsiDf (changing NSI DF)
modifyCsiData    According to the modifyCsiType
modifyCsiTime    Timestamp indicating the modify time of the
                 CSI. For example, the CSI may be modified
                 at this timestamp.

Output Parameters

Parameter          Description
lifecycleOperation An Identifier of the service
OccurrenceCsiID    operation occurrence

Terminate CSI

Message              Direction
terminateCsiRequest  SM -> CSMF
terminateCsiResponse CSMF -> SM

Input Parameters

Parameter        Description
CsiID            An Identifier of the CSI that needs to be terminated.
terminateCsiTime Timestamp indicating the terminate time of the
                 CSI. For example, the CSI may be terminated at
                 this timestamp.

CSMF-NSMF Exposed Interfaces (525)

This is the interface 525 between CSMF 521-NSMF 522. In some embodiments, interface 505 is the same as interface 525. This interface is used to manage the NSI that is used to serve the CSI.

Template Management Interface

This interface allows the management of templates. The following operations are defined for this interface.

• • Template retrieve;
  • On-board Template;
  • Update Template;
  • Delete Template;

NOTE: (B)SM can be used to replace CSMF when Network slice instance as a service is requested.

Template Retrieve

Message          Direction
TemplateRequest  CSMF -> NSMF
TemplateResponse NSMF -> CSMF

Input Parameters

Parameter    Description
templateType Specifies the type of template that is requested. This
             parameter can Indicate any one of: Communication
             Service Template (CST), Network Slice Instance
             Template (NST), or Network Slice Subnet Instance
             (NSST)

Output Parameters

Parameter Description
Template  Contains content data of the
          requested CST, NST or NSST.

On-Board Template

Message                 Direction
OnboardTemplateRequest  CSMF -> NSMF
OnboardTemplateResponse NSMF -> CSMF

Input Parameters

Parameter Description
Template  As above

Output Parameters

Parameter    Description
TemplateInfo Acknowledgment indicating success
             (ACK) or failure (NACK).

Network Requirement Management Interface

This interface allows the management of Service Requirements. The following operations are defined for this interface

• • Query Service Capability;
  • Initiate Service Requirement;
  • Negotiate Service Requirement;
  • Update Service Requirement;

NOTE: (B)SM can be used to replace CSMF when Network slice instance as a service is requested.

Query Service Capability

Message                       Direction
QueryServiceCapabilityRequest CSMF -> NSMF
QueryCapabilityResponse       NSMF -> CSMF

Input Parameters

Parameter         Description
QueryService      An Identifier of Service that is requested,
CapabilityRequest or for which Capability is requested.

Output Parameters

Parameter         Description
serviceCapability A list of services and their respective
                  capability/capacity

Initiate Service Requirement (Admission Control)

Message                        Direction
initiateServiceRequireRequest  CSMF -> NSMF
initiateServiceRequireResponse NSMF -> CSMF

Input Parameters

Parameter      Description
serviceRequire An identification of a Service Requirement.
nst            If NST is exposed to CSMF, NST can be
               used in this step.

Output Parameters

Parameter             Description
ServiceRequireResults If successful, ACK with the ID of the agreed
                      Service Requirement. Otherwise, NACK

Negotiate Service Requirement

Message                         Direction
negotiateServiceRequireRequest  CSMF -> NSMF
negotiateServiceRequireResponse NSMF -> CSMF

Input Parameters

Parameter      Description
ServiceRequire Data defining a Service requirement.

Output Parameters

Parameter             Description
ServiceRequireResults If successful, ACK with the ID of the agreed
                      Service Requirement. Otherwise, NACK

Update Service Requirement

Message                      Direction
updateServiceRequireRequest  CSMF -> NSMF
updateServiceRequireResponse NSMF -> CSMF

Input Parameters

Parameter        Description
serviceRequireID An Identifier of the Service Requirement
                 that needs to be updated.
ServiceRequire   Data defining a Service Requirement

Output Parameters

Parameter                   Description
updateServiceRequireResults If successful, ACK with the ID of
                            the agreed Service Requirement.
                            Otherwise, NACK

Network Resource Management Interface

This interface allows the management of Network Resources. The following operations are defined for this interface

• • Query network resource;

Query Network Resource

Message                      Direction
queryNetworkResourceRequest  CSMF -> NSMF
queryNetworkResourceResponse NSMF -> CSMF

Input Parameters

Parameter         Description
filter            Filter defining the network resource to which the
                  query applies
attributeSelector a list of attribute names of network resource. If
                  present, these attributes may be returned for the
                  instances of network resources matching the filter.
                  In some embodiments, if this parameter is
                  omitted, the complete list of attributes for the
                  instances of network resources matching
                  the filter may be returned

Output Parameters

Parameter           Description
networkResourceData List the network resources with capability

NSI LM Interface

This interface allows the management of services. The following operations are defined for this interface

• • Instantiate NSI;
  • Activate NSI;
  • Deactivate NSI;
  • Modify NSI;
  • Query NSI;
  • Terminate NSI;

Instantiate NSI

Message                Direction
instantiateNsiRequest  CSMF -> NSMF
instantiateNsiResponse NSMF -> CSMF

Input Parameters

Parameter          Description
NstID              An Identifier of the NST that needs to be used.
instantiateNsiTime Timestamp indicating the instantiate time of
                   the NSI. For example, the NSI may be
                   instantiated at this timestamp.

Output Parameters

Parameter Description
nsiID     An Identifier of the NSI

Activate NSI

Message             Direction
activateNsiRequest  CSMF -> NSMF
activateNsiResponse NSMF -> CSMF

Input Parameters

Parameter       Description
NsiD            An Identifier of the CSI that needs to be activated.
activateNsiTime Timestamp indicating the activate time of the NSI. For
                example, the NSI may be activated at this timestamp.

Output Parameters

Parameter             Description
NsilifecycleOperation An Identifier of the of the
OccurrenceID          NSI operation occurrence

Deactivate NSI

Message               Direction
deactivateNsiRequest  CSMF -> NSMF
deactivateNsiResponse NSMF -> CSMF

Input Parameters

Parameter         Description
NsiID             An Identifier of the NSI that needs to be deactivated.
deactivateNsiTime Timestamp indicating the deactivate time of the NSI.
                  For example, the NSI may be deactivated at this
                  timestamp.
nsiID             An Identifier of an associated NSI

Query NSI

Message          Direction
QueryNsiRequest  CSMF -> NSMF
QueryNsiResponse NSMF -> CSMF

Input Parameters

Parameter         Description
nsiID             An Identifier of an associated NSI
filter            Filter defining the services to which the query
                  applies, based on attributes of the NSI.
attributeSelector a list of attribute names of NSI. If present,
                  these attributes may be returned for the instances
                  of NSI matching the filter. In some embodiments,
                  if this parameter is omitted, the complete list of
                  attributes for the instances of NSI matching the
                  filter may be returned

Output Parameters

Parameter      Description
queryNsiResult Information on NSI(s) that
               match the input filter.

Modify NSI

Message           Direction
modifyNsiRequest  CSMF -> NSMF
modifyNsiResponse NSMF -> CSMF

Input Parameters

Parameter        Description
nsiID            An Identifier of an associated NSI
NstID            An Identifier of the NST that needs to be used
serviceRequireID Identifier of the Service Requirement that
                 needs to be used
modifyNsiType    Specifies the type of update. This parameter
                 determines also which one of the following
                 parameter is present in the operation. Possible
                 values include:
                 AddNssi (adding existing NSSIs),
                 RemoveNssi (removing NSSI),
                 InstantiateNssi (instantiating new NSSI(s)),
                 OperateNssi (changing NSSI state),
                 ChangeExtNssiConnectivity (changing the
                 external connectivity of NSSI).
                 AddNsiSap (adding SAP(s)),
                 RemoveNsiSap (removing SAP(s)),
                 AddNssiSap (adding SAP(s)),
                 RemoveNssiSap (removing SAP(s)),
                 AssocNewNstVersion (associating a new
                 NST version to the NS instance),
                 MoveNssi (moving NSSI instance(s) from
                 one origin NSI to another target NSI),
                 ChangeNsiDf (changing NSI DF)
modifyNsiData    According to the modifyNsiType
modifyNsiTime    Timestamp indicating the modify time of the
                 NSI. For example, the NSI may be modified
                 at this timestamp.

Output Parameters

Parameter          Description
lifecycleOperation An Identifier of the service
OccurrenceNsiID    operation occurrence

Terminate NSI

Message              Direction
terminateNsiRequest  CSMF -> NSMF
terminateNsiResponse NSMF -> CSMF

Input Parameters

Parameter        Description
NsiID            An Identifier of the NSI that needs to be terminated.
terminateNsiTime Timestamp indicating the terminate time of the NSI.
                 For example, the NSI may be terminated at this
                 timestamp.

NSMF-NSSMF Exposed Interfaces (526)

This is the interface 526 between NSMF 522-NSSMF 523 and or interface adaptor 641. In some embodiments, interface 507 is the same as interface 526. This interface is used to manage the NSSI that is used to serve the NSI.

NSST Management Interface

This interface allows the management of templates. The following operations are defined for this interface

• • Template retrieve;
  • On-board NSST;
  • Update NSST;
  • Delete NSST;

NOTE: (B)SM can be used to replace NSMF when Network slice instance as a service is requested.

Template Retrieve

Message          Direction
TemplateRequest  NSMF -> NSSMF
TemplateResponse NSSMF -> NSMF

Output Parameters

Parameter Description
nsstData  Contains content data of the requested NSST.

On-Board Template

Message             Direction
OnboardNsstRequest  NSMF -> NSSMF
OnboardNsstResponse NSSMF -> NSMF

Input Parameters

Parameter Description
nsst      NSST with parameter used to instantiate the NSSI

Output Parameters

Parameter Description
nsstID    Identifier of the Template

Update NSST

Message            Direction
UpdateNsstRequest  NSMF -> NSSMF
UpdateNsstResponse NSSMF -> NSMF

Input Parameters

Parameter Description
nsstID    Identifier of the template
nsst      NSST with parameter used to instantiate the NSSI

Output Parameters

Parameter Description
nsstID    Identifier of the new NSST

Network Requirement Management Interface

This interface allows the management of Service Requirements. The following operations are defined for this interface

• • Query Service Capability;
  • Initiate Service Requirement;
  • Negotiate Service Requirement;
  • Update Service Requirement;

NOTE: (B)SM can be used to replace NSMF when Network slice instance as a service is requested.

Query Service Capability

Message                       Direction
QueryServiceCapabilityRequest NSMF -> NSSMF
QueryCapabilityResponse       NSSMF -> NSMF

Input Parameters

Parameter                     Description
QueryServiceCapabilityRequest An Identifier of Service that is requested,
                              or for which Capability is requested.

Output Parameters

Parameter         Description
serviceCapability A list of services and their respective capability/capacity

Initiate Service Requirement (Admission Control)

Message                        Direction
initiateServiceRequireRequest  CSMF -> NSMF
initiateServiceRequireResponse NSMF -> CSMF

Input Parameters

Parameter      Description
serviceRequire An identification of a Service Requirement.

Output Parameters

Parameter             Description
ServiceRequireResults If successful, ACK with the ID of the agreed
                      Service Requirement. Otherwise, NACK

Negotiate Service Requirement

Message                         Direction
negotiateServiceRequireRequest  NSMF -> NSSMF
negotiateServiceRequireResponse NSSMF -> NSMF

Input Parameters

Parameter      Description
ServiceRequire Data defining a Service requirement.

Output Parameters

Parameter             Description
ServiceRequireResults If successful, ACK with the ID of the agreed
                      Service Requirement. Otherwise, NACK

Update Service Requirement

Message                      Direction
updateServiceRequireRequest  NSMF -> NSSMF
updateServiceRequireResponse NSSMF -> NSMF

Input Parameters

Parameter        Description
serviceRequireID An Identifier of the Service Requirement
                 that needs to be updated.
ServiceRequire   Data defining a Service Requirement

Output Parameters

Parameter                   Description
updateServiceRequireResults If successful, ACK with the ID
                            of the agreed Service Requirement.
                            Otherwise, NACK

Network Resource Management Interface

This interface allows the management of Network Resources. The following operations are defined for this interface

• • Query network resource;

Query Network Resource

Message                      Direction
queryNetworkResourceRequest  NSMF -> NSSMF
queryNetworkResourceResponse NSSMF -> NSMF

Input Parameters

Parameter         Description
filter            Filter defining the network resource to which
                  the query applies
attributeSelector a list of attribute names of network resource.
                  If present, these attributes may be returned
                  for the instances of network resources
                  matching the filter. In some embodiments,
                  if this parameter is omitted, the complete list of
                  attributes for the instances of network resources
                  matching the filter may be returned

Output Parameters

Parameter           Description
networkResourceData List the network resources with capability

NSSI LM Interface

This interface allows the management of service. The following operations are defined for this interface

• • Instantiate NSSI using Service Requirements;
  • Activate NSSI;
  • Deactivate NSSI;
  • Modify NSSI;
  • Query NSSI;
  • Terminate NSSI;

Instantiate NSSI Using Service Requirements

Message                 Direction
instantiateNssiRequest  NSMF -> NSSMF
instantiateNssiResponse NSSMF -> NSMF

Input Parameters

Parameter           Description
ServiceRequireID    An Identifier of the Service Requirements
                    that needs to be used for the service.
instantiateNssiTime Timestamp indicating the instantiate time
                    of the NSSI. For example, the NSSI may be
                    instantiated at this timestamp.

Output Parameters

Parameter Description
nssiID    An Identifier of the NSSI

Instantiate NSSI Using NSST

Message                 Direction
instantiateNssiRequest  NSMF -> NSSMF
instantiateNssiResponse NSSMF -> NSMF

Input Parameters

Parameter           Description
nsstID              An Identifier of the NSST that
                    needs to be used for the service.
instantiateNssiTime Timestamp indicating the instantiate
                    time of the NSSI. For example, the
                    NSSI may be instantiated at this timestamp.

Output Parameters

Parameter Description
nssiID    An Identifier of the NSSI

Activate NSSI

Message              Direction
activateNssiRequest  NSMF -> NSSMF
activateNssiResponse NSSMF -> NSMF

Input Parameters

Parameter        Description
NssiID           An Identifier of the NSSI
                 that needs to be activated.
activateNssiTime Timestamp indicating the
                 activate time of the NSSI.
                 For example, the NSI may
                 be activated at this timestamp.

Output Parameters

Parameter                        Description
NssiLifecycleOperationOccurrenceID An Identifier of the of the NSSI
                                 operation occurrence

Deactivate NSSI

Message                Direction
deactivateNssiRequest  NSMF -> NSSMF
deactivateNssiResponse NSSMF -> NSMF

Input Parameters

Parameter          Description
NssiID             An Identifier of the NSSI that needs to be
                   deactivated.
deactivateNssiTime Timestamp indicating the deactivate time of the
                   NSSI. For example, the NSI may be deactivated at
                   this timestamp.

Query NSSI

Message           Direction
QueryNssiRequest  NSMF -> NSSMF
QueryNssiResponse NSSMF -> NSMF

Input Parameters

Parameter         Description
nssiID            An Identifier of an associated NSSI
filter            Filter defining the services to which the query applies,
                  based on attributes of the NSSI.
attributeSelector a list of attribute names of NSSI. If present, these
                  attributes may be returned for the instances of NSSI
                  matching the filter.
                  In some embodiments, if this parameter is omitted, the
                  complete list of attributes for the instances of NSSI
                  matching the filter may be returned

Output Parameters

Parameter       Description
queryNssiResult Information on NSSI(s) that match the input filter.

Modify NSSI

Message            Direction
modifyNssiRequest  NSMF -> NSSMF
modifyNssiResponse NSSMF -> NSMF

Input Parameters

Parameter      Description
nssiID         An Identifier of an associated NSSI
NsstID         An Identifier of the NSST that needs to be used
modifyNssiType Specifies the type of update. This parameter determines
               also which one of the following parameter is present in
               the operation. Possible values include:
               AddNssi (adding existing NSSIs),
               RemoveNssi (removing NSSI),
               InstantiateNssi (instantiating new NSSI(s)),
               OperateNssi (changing NSSI state),
               ChangeExtNssiConnectivity (changing the external
               connectivity of NSSI).
               AddInfSap (adding SAP(s)),
               RemoveInfSap (removing SAP(s)),
               AssocNewNstVersion (associating a new NST version
               to the NS instance),
               MoveNssi (moving NSSI instance(s) from one origin
               NSI to another target NSI),
               ChangeNsiDf (changing NSI DF)
modifyNssiData According to the modifyNssiType
modifyNssiTime Timestamp indicating the modify time of the NSSI. For
               example, the NSSI may be modified at this timestamp.

Output Parameters

Parameter                        Description
LifecycleOperationOccurrenceNssiID An Identifier of the service
                                 operation occurrence

Terminate NSSI

Message               Direction
terminateNssiRequest  NSMF -> NSSMF
terminateNssiResponse NSSMF -> NSMF

Input Parameters

Parameter         Description
NssiID            An Identifier of the NSSI that needs to be
                  terminated.
terminateNssiTime Timestamp indicating the terminate time of the
                  NSSI. For example, the NSSI may be terminated at
                  this timestamp.

Interface Conversions

Nsmf-Nssmf to Os-Ma-Nfvo

NOTE: (B)SM can be used to replace NSMF when Network slice instance as a service is requested.

• • NSST, SERVICEREQUIRE management interface to NSD interface
  • NSSI LM interface to NS LM interface
  • NSSI PM interface to NS PM interface
  • NSSI FM interface to NS FM interface

Nsmf-Nssmf to Itf-N

NOTE: (B)SM can be used to replace NSSMF when Network slice instance as a service is requested.

• • NSSI LM interface to Generic/Common Interface IRPs
  • NSSI LM interface to CM related Interface IRPs
  • NSSI LM interface to SON related Interface IRPs
  • NSSI PM interface to PM file format/collection & Trace related Interface IRPs
  • NSSI FM interface to FM related Interface IRPs

Template and Servicerequire Parameters/Attributes

CST Data

In this section, attributes of a CST are listed.

Parameter	Content	Description
Type	String	This parameter describes the
		communication service type,
		e.g., eMBB.
Area	geographicData
Domain
Traffic	TrafficVolumeData	This parameter describes the
Volume		volume of traffic of the requested
		service.
Users	UsersDistributionData	This parameter describes the
Distribution		distribution of users of the
		requested service.
ServicRequire	ServiceRequireData

ServiceRequire
Parameter	Content	Description
Availability	String	This parameter describes the
		communication service type,
		e.g., eMBB.
Utilization	geographicData
Domain
SERVICEREQUIRE	ServiceRequire
	Data

NST Data

In this section, attributes of a NST are listed

Parameter	Content	Description
Type	String	This parameters describe the
		communication service type,
		e.g., eMBB. etc.
Area	geographicData
domain	domainData	RAN or CN. Related NFs
DeploymentSetup	deploymentSetup
	Data

NSST Data

In this section, attributes of a NSST are listed

Parameter	Content	Description
Type	String	This parameter describes the
		communication service type,
		e.g., eMBB.
Area	geographicData
domain	domainData	RAN or CN. Related NFs etc.
DeploymentSetup	DeploymentSetup

Network management entities carrying out or controlling the methods described above may be resident within a management plane of a communications network. These entities may interact with control plane entities (and possibly user/data plane entities) within the network slices instances that are created and discussed. These network management entities may provide methods and functions for the utilization of slice templates and slice instance profiles to satisfy or address (wholly or in part) communication service requests. These communication service requests may be received from a customer of a service provider. Addressing the communication service requests may include taking into account aspects of the lifecycle management of communication service instances and network slices instances.

Although the present disclosure has been described with reference to specific features and embodiments thereof, it is evident that various modifications and combinations can be made thereto without departing from the disclosure. The specification and drawings are, accordingly, to be regarded simply as an illustration of the disclosure as defined by the appended claims, and are contemplated to cover any and all modifications, variations, combinations or equivalents that fall within the scope of the present disclosure.

Claims

1. A method of providing telecommunication communication services to a customer, comprising, at a network management function (MF) of a telecommunication service provider: receiving an order in accordance with an agreement as to terms of a telecommunications service offering;accessing network resources that satisfy the terms of the service offering;initializing an instance of the service offering using the resources accessible thereby;creating at least one interface by which the service offering is made available to the customer; andexposing each of the at least one created interfaces to enable an MF of the customer to use the service offering.

2. The method according to claim 1, wherein the agreement is negotiated with the customer by a network service MF (SMF).

3. The method according to claim 2, wherein the network SMF receives directions from a business support system (BSS) network MF as to the terms of the service offering.

4. The method according to claim 2, wherein the step of creating comprises creating an SMF to SMF interface between the network SMF and an SMF of the customer.

5. The method according to claim 4, wherein the SMF to SMF interface comprises at least one of a template request interface and a service requirement interface.

6. The method according to claim 5, wherein the SMF to SMF template request interface specifies at least one service offering selected from a group consisting of Communications as a Service (CaaS), Network Slice as a Service (NSaaS), Network Slice Subnet as a Service (NSSaaS) and Infrastructure as a Service (IaaS).

7. The method according to claim 2, wherein the step of creating comprises creating an SMF to network MF interface between the network SMF and the network MF.

8. The method according to claim 7, wherein the SMF to network MF interface comprises at least one of a template request interface, a service requirement interface, a network requirement interface and a resource management interface.

9. The method according to claim 8, wherein the network MF comprises at least one of: a Network Slice MF (NSMF), where the customer MF is a communication service MF (CSMF) and the SMF to network MF template request interface specifies a Network Slice as a Service (NSaaS) offering;a Network Slice Subnet MF (NSSMF), where the customer MF is an NSMF and the SMF to network MF template request interface specifies a Network Slice Subnet as a Service (NSSaaS) offering; andan Infrastructure MF (InMF), where the customer MF is an NSSMF and the SMF to network MF template request interface specifies an Infrastructure as a Service (IaaS) offering.

10. The method according to claim 9, wherein the exposed at least one interface enabling the customer MF to use the service offering of the network MF comprises at least one of a resource management (RM) interface and a lifecycle management (LM) interface.

11. The method according to claim 1, wherein the step of creating comprises creating an interface between the network MF and another MF to support at least one of a resource management and a lifecycle management function.

12. The method according to claim 1, wherein the step of creating comprises creating an interface between a network slice MF (NSMF) and at least one of a element manager (EM) MF, a domain manager (DM) MF and a management and orchestration (MANO) MF.

13. The method according to claim 12, wherein the exposed at least one interface performs interface conversion between the NSMF and the at least one of the EM MF, DM MF and MANO MF.

14. A network management function (MF) of a telecommunications service provider, comprising: a processor;a non-transitory memory for storing instructions that when executed by the processor cause the network MF to provide a telecommunications communication service to a customer, by:receiving an order in accordance with an agreement as to terms of a telecommunications service offering;accessing network resources that satisfy the terms of the service offering;initializing an instance of the service offering using the resources accessible thereby;creating at least one interface by which the service offering is made available to the customer; andexposing each of the at least one created interfaces to enable an MF of the customer to use the service offering.