Patent Application
20240388970
The present disclosure relates generally to the technology of mobile communication, and in particular, to a method, and an apparatus for dynamic QoS characteristics query in mobile network.
This section introduces aspects that may facilitate better understanding of the present disclosure. Accordingly, the statements of this section are to be read in this light and are not to be understood as admissions about what is in the prior art or what is not in the prior art.
In the recent mobile/wireless networks, such as the 5G (fifth generation) system architecture, the system is designed as the Service Based Architecture (SBA), which is different from the previous monolithic architecture and aims at decoupling network services. The SBA leverages microservices interactions between different network functions to make the 5G framework become more extensible and flexible. The 5G network functions such as User plane Function (UPF), Access and Mobility Management Function (AMF), Session Management Function (SMF), Network Data Analytics Function (NWDAF), Network Slice Selection Function (NSSF), and Network Exposure Function (NEF) play essential roles in offering specific quality of services.
The Quality of Service (QoS) is the measurement of the overall service performance, includes the information like priorities of different applications and the guarantee of a certain level of data flow. In the 5G network, when UE prepares to subscribe to a specific QoS, the UE or other node serving the UE may send request to the core network side.
However, due to mobility of UE or other reasons, the QoS level requested by the UE is not always available.
This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
Certain aspects of the present disclosure and their embodiments may provide solutions to these or other challenges. There are, proposed herein, various embodiments which address one or more of the issues disclosed herein. For example, in embodiments of the present disclosure, it is possible for the UE or other server node to obtain information about currently available QoS.
A first aspect of the present disclosure provides a method performed by a first network node in a communication network. The method may comprise receiving a request about QoS information for a terminal device. The method may further comprise determining the QoS information for the terminal device, based at least on a location of the terminal device and/or a network status. The method may further comprise transmitting a response including the determined QoS information.
In exemplary embodiments of the present disclosure, the request may comprise at least one of: an internet protocol address of the terminal device, a QoS service name, an Access Point Name, APN, and/or a data network name, DNN.
In exemplary embodiments of the present disclosure, the method may further comprise obtaining an identifier of the terminal device in the communication network, based on the internet protocol address of the terminal device. The method may further comprise obtaining the location of the terminal device, based on the identifier of the terminal device.
In exemplary embodiments of the present disclosure, the location of the terminal device is obtained, based on a mapping relationship between the location and an internet protocol address range including the internet protocol address of the terminal device.
In exemplary embodiments of the present disclosure, the identifier of the terminal device may comprise a generic public subscription identifier, GPSI, or an international mobile subscriber identity, IMSI, or a subscription permanent identifier, SUPI.
In exemplary embodiments of the present disclosure, the first network node may obtain the location of the terminal device from a unified data management, UDM, and/or an access and mobility management function, AMF, and/or Gateway Mobile Location Centre, GMLC.
In exemplary embodiments of the present disclosure, the first network node may obtain the network status from a network data analytics function, NWDAF. The network status may comprise information about network resources, and/or congestion status.
In exemplary embodiments of the present disclosure, the first network node may determine the QoS information for the terminal device, based further on a policy and charging control rule, PCC rule, and/or a single network slice selection assistance information, NSSAI, and/or the location of the terminal device, and/or the network status, and/or an available period/time.
In exemplary embodiments of the present disclosure, the first network node may obtain the PCC rule, from a policy control function, PCF.
In exemplary embodiments of the present disclosure, the first network node may obtain the NSSAI from a unified data repository, UDR, and/or a network slice selection function, NSSF.
In exemplary embodiments of the present disclosure, the first network node may determine the QoS information, by applying a predetermined policy about a relationship between the QoS information for the terminal device, and the location of the terminal device and/or the network status, and/or a device type of the terminal device, and/or a device subscription for the terminal device. The device subscription for the terminal device comprises a mapping relationship between the location of the terminal device and the QoS information.
In exemplary embodiments of the present disclosure, the determined QoS information comprise QoS characteristics available for the terminal device.
In exemplary embodiments of the present disclosure, the QoS characteristics may comprise at least one of: 5G QoS Identifier, 5QI; QoS Class Identifier, QCI; Allocation and Retention Priority, ARP; Network Slice Selection Assistance Information, NSSAI; Guaranteed Flow Bit Rate, GFBR; Maximum Flow Bit Rate, MFBR; Maximum Packet Loss Rate; per Session Aggregate Maximum Bit Rate, Session-AMBR; Aggregate Maximum Bit Rate, AMBR; Reflective QoS Attribute, RQA; Notification control; QoS Flow ID, QFI; and/or QoS Rules. The determined QoS information may further comprise a specific location area for the QoS characteristics.
In exemplary embodiments of the present disclosure, the determined QoS information may further comprise: an available time window and/or an available location area for the QoS characteristics.
In exemplary embodiments of the present disclosure, the request comprises a subscription of a notification about change of the QoS information.
In exemplary embodiments of the present disclosure, the first network node may receive the request from the terminal device, or a second network node severing the terminal device.
In exemplary embodiments of the present disclosure, the first network node may comprise a network exposure function, NEF. The first network node may receive the request from the terminal device, directly or via another network node.
A second aspect of the present disclosure provides a method performed by a second network node in a communication network. The method may comprise transmitting a request about QoS information for a terminal device. The method may further comprise receiving a response including determined QoS information. The determined QoS information for the terminal device is based at least on a location of the terminal device and/or a network status.
In exemplary embodiments of the present disclosure, the request may comprise at least one of: an internet protocol address of the terminal device, a QoS service name, an Access Point Name, APN, and/or a data network name, DNN.
In exemplary embodiments of the present disclosure, the determined QoS information comprise QoS characteristics available for the terminal device.
In exemplary embodiments of the present disclosure, the QoS characteristics comprise at least one of: 5G QoS Identifier, 5QI; QoS Class Identifier, QCI; Allocation and Retention Priority, ARP; Network Slice Selection Assistance Information, NSSAI; Guaranteed Flow Bit Rate, GFBR; Maximum Flow Bit Rate, MFBR; Maximum Packet Loss Rate; per Session Aggregate Maximum Bit Rate, Session-AMBR; Aggregate Maximum Bit Rate, AMBR; Reflective QoS Attribute, RQA; Notification control; QoS Flow ID, QFI; and/or QoS Rules. The determined QoS information may further comprise a specific location area for the QoS characteristics.
In exemplary embodiments of the present disclosure, the determined QoS information may further comprise: an available time window and/or an available location area for the QoS characteristics.
In exemplary embodiments of the present disclosure, the request comprises a subscription of a notification about change of the QoS information.
In exemplary embodiments of the present disclosure, the second network node may be severing the terminal device, and may transmit the request to a first network node.
In exemplary embodiments of the present disclosure, the first network node may comprise a network exposure function, NEF. The first network node may receive the request from the terminal device, directly or via another network node.
A third aspect of the present disclosure provides a method performed by a terminal device in a communication network. The method may comprise transmitting a request about QoS information for a terminal device. The method may further comprise receiving a response including determined QoS information. The determined QoS information for the terminal device may be based at least on a location of the terminal device and/or a network status.
In exemplary embodiments of the present disclosure, the request may comprise at least one of: an internet protocol address of the terminal device, a QoS service name, an Access Point Name, APN, and/or a data network name, DNN.
In exemplary embodiments of the present disclosure, the determined QoS information comprise QoS characteristics available for the terminal device.
In exemplary embodiments of the present disclosure, the QoS characteristics comprise at least one of: 5G QoS Identifier, 5QI; QoS Class Identifier, QCI; Allocation and Retention Priority, ARP; Network Slice Selection Assistance Information, NSSAI; Guaranteed Flow Bit Rate, GFBR; Maximum Flow Bit Rate, MFBR; Maximum Packet Loss Rate; per Session Aggregate Maximum Bit Rate, Session-AMBR; Aggregate Maximum Bit Rate, AMBR; Reflective QoS Attribute, RQA; Notification control; QoS Flow ID, QFI; and/or QoS Rules. The determined QoS information may further comprise a specific location area for the QoS characteristics.
In exemplary embodiments of the present disclosure, the determined QoS information may further comprise: an available time window and/or an available location area for the QoS characteristics.
In exemplary embodiments of the present disclosure, the request comprises a subscription of a notification about change of the QoS information.
In exemplary embodiments of the present disclosure, the terminal device may transmit the request to a first network node, directly or via another network node.
In exemplary embodiments of the present disclosure, the first network node may comprise a network exposure function, NEF.
A fourth aspect of the present disclosure provides a first network node. The first network node may comprise a processor, and a memory. The memory may contain instructions executable by the processor. The first network node may be operative to receive a request about QoS information for a terminal device. The first network node may be further operative to determine the QoS information for the terminal device, based at least on a location of the terminal device and/or a network status. The first network node may be further operative to transmit a response including the determined QoS information.
In exemplary embodiments of the present disclosure, the first network node is further operative to perform the method according to any of the embodiments of the first aspect of the present disclosure.
A fifth aspect of the present disclosure provides a second network node. The second network node may comprise a processor, and a memory. The memory may contain instructions executable by the processor. The second network node may be operative to transmit a request about QoS information for a terminal device. The second network node may be further operative to receive a response including determined QoS information. The determined QoS information for the terminal device is based at least on a location of the terminal device and/or a network status.
In exemplary embodiments of the present disclosure, the second network node is further operative to perform the method according to any of the embodiments of the second aspect of the present disclosure.
A sixth aspect of the present disclosure provides a terminal device. The terminal device may comprise a processor, and a memory. The memory may contain instructions executable by the processor. The terminal device may be operative to transmit a request about QoS information for a terminal device. The terminal device may be further operative to receive a response including determined QoS information. The determined QoS information for the terminal device may be based at least on a location of the terminal device and/or a network status.
In exemplary embodiments of the present disclosure, the terminal device is further operative to perform the method according to any of the embodiments of the third aspect of the present disclosure.
A seventh aspect of the present disclosure provides a computer readable storage medium comprising instructions which when executed by a processor, cause the processor to perform the method according to any of embodiments above mentioned.
According to embodiments of the present disclosure, it is possible for the terminal device (such as UE) or other server node to obtain information about currently available QoS. It will take full advantage of network resources and UE could avoid meaningless retry operations.
Through the more detailed description of some embodiments of the present disclosure in the accompanying drawings, the above and other objects, features and advantages of the present disclosure will become more apparent, wherein the same reference generally refers to the same components in the embodiments of the present disclosure.
Some of the embodiments contemplated herein will now be described more fully with reference to the accompanying drawings. Other embodiments, however, are contained within the scope of the subject matter disclosed herein, the disclosed subject matter should not be construed as limited to only the embodiments set forth herein; rather, these embodiments are provided by way of example to convey the scope of the subject matter to those skilled in the art.
Generally, all terms used herein are to be interpreted according to their ordinary meaning in the relevant technical field, unless a different meaning is clearly given and/or is implied from the context in which it is used. All references to a/an/the element, apparatus, component, means, step, etc. are to be interpreted openly as referring to at least one instance of the element, apparatus, component, means, step, etc., unless explicitly stated otherwise. The steps of any methods disclosed herein do not have to be performed in the exact order disclosed, unless a step is explicitly described as following or preceding another step and/or where it is implicit that a step must follow or precede another step. Any feature of any of the embodiments disclosed herein may be applied to any other embodiment, wherever appropriate. Likewise, any advantage of any of the embodiments may apply to any other embodiments, and vice versa. Other objectives, features and advantages of the enclosed embodiments will be apparent from the following description.
Reference throughout this specification to features, advantages, or similar language does not imply that all of the features and advantages that may be realized with the present disclosure should be or are in any single embodiment of the disclosure. Rather, language referring to the features and advantages is understood to mean that a specific feature, advantage, or characteristic described in connection with an embodiment is included in at least one embodiment of the present disclosure. Furthermore, the described features, advantages, and characteristics of the disclosure may be combined in any suitable manner in one or more embodiments. One skilled in the relevant art will recognize that the disclosure may be practiced without one or more of the specific features or advantages of a particular embodiment. In other instances, additional features and advantages may be recognized in certain embodiments that may not be present in all embodiments of the disclosure.
As used herein, the term “network”, or “communication network/system” refers to a network/system following any suitable communication standards, such as new radio (NR), long term evolution (LTE), LTE-Advanced, wideband code division multiple access (WCDMA), high-speed packet access (HSPA), and so on. Furthermore, the communications between a terminal device and a network node in the communication network may be performed according to any suitable generation communication protocols, including, but not limited to, the first generation (1G), the second generation (2G), 2.5G, 2.75G, the third generation (3G), 4G, 4.5G, 5G communication protocols, and/or any other protocols either currently known or to be developed in the future.
The term “network node” refers to a network device with accessing function in a communication network via which a terminal device accesses to the network and receives services therefrom. The network node may include a base station (BS), an access point (AP), a multi-cell/multicast coordination entity (MCE), a controller or any other suitable device in a wireless communication network. The BS may be, for example, a node B (NodeB or NB), an evolved NodeB (eNodeB or eNB), a next generation NodeB (gNodeB or gNB), a remote radio unit (RRU), a radio header (RH), a remote radio head (RRH), a relay, a low power node such as a femto, a pico, and so forth.
A network function or network node can be implemented either as a network element on a dedicated hardware, as a software instance running on a dedicated hardware, or as a virtualised function instantiated on an appropriate platform, e.g. on a cloud infrastructure.
Yet further examples of the network node comprise multi-standard radio (MSR) radio equipment such as MSR BSs, network controllers such as radio network controllers (RNCs) or base station controllers (BSCs), base transceiver stations (BTSs), transmission points, transmission nodes, positioning nodes and/or the like. More generally, however, the network node may represent any suitable device (or group of devices) capable, configured, arranged, and/or operable to enable and/or provide a terminal device access to a wireless communication network or to provide some service to a terminal device that has accessed to the wireless communication network. For example, the network node may comprise any kind of core network node/entity/function.
The term “terminal device” refers to any end device that can access a communication network and receive services therefrom. By way of example and not limitation, the terminal device may refer to a user equipment (UE), or other suitable devices. The UE may be, for example, a subscriber station, a portable subscriber station, a mobile station (MS) or an access terminal (AT). The terminal device may include, but not limited to, portable computers, image capture terminal devices such as digital cameras, gaming terminal devices, music storage and playback appliances, a mobile phone, a cellular phone, a smart phone, a tablet, a wearable device, a personal digital assistant (PDA), a vehicle, and the like.
As yet another specific example, in an Internet of things (IoT) scenario, a terminal device may also be called an IoT device and represent a machine or other device that performs monitoring, sensing and/or measurements etc., and transmits the results of such monitoring, sensing and/or measurements etc. to another terminal device and/or a network equipment. The terminal device may in this case be a machine-to-machine (M2M) device, which may in a 3rd generation partnership project (3GPP) context be referred to as a machine-type communication (MTC) device.
As one particular example, the terminal device may be a UE implementing the 3GPP narrow band Internet of things (NB-IoT) standard. Particular examples of such machines or devices are sensors, metering devices such as power meters, industrial machinery, or home or personal appliances, e.g. refrigerators, televisions, personal wearables such as watches etc. In other scenarios, a terminal device may represent a vehicle or other equipment, for example, a medical instrument that is capable of monitoring, sensing and/or reporting etc. on its operational status or other functions associated with its operation.
As used herein, the terms “first”, “second” and so forth refer to different elements. The singular forms “a” and “an” are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms “comprises”, “comprising”, “has”, “having”, “includes” and/or “including” as used herein, specify the presence of stated features, elements, and/or components and the like, but do not preclude the presence or addition of one or more other features, elements, components and/or combinations thereof. The term “based on” is to be read as “based at least in part on”. The term “one embodiment” and “an embodiment” are to be read as “at least one embodiment”. The term “another embodiment” is to be read as “at least one other embodiment”. Other definitions, explicit and implicit, may be included below.
The Quality of Service (QoS) is the measurement of the overall service performance, includes the information like priorities of different applications and the guarantee of a certain level of data flow. For example, the 5G QoS model supports both QoS Flows that require guaranteed flow bit rate (GBR QoS Flows), QoS Flows that do not require guaranteed flow bit rate (Non-GBR QoS Flows) and the Reflective QoS [1]. Each QoS Flow owns a QoS information, and each QoS information owns QoS parameters. The QoS parameters will include 5G QoS Identifier (5QI) and Allocation and Retention Priority (ARP), in case of GBR QoS Flow will involve Guaranteed Flow Bit Rate (GFBR), Maximum Flow Bit Rate (MFBR) and Maximum Packet Loss Rate, etc.
The 5QI closes to the QCI concept in 4G that represents a set of 5G QoS characteristics, and 5QI provides more numerical levels for identifying the specific quality of services. 5G QoS characteristics describe the flow priority, packet delay budget, packet error rate, etc. The ARP contains the priority level which deciding whether a QoS Flow establishment/modification/handover may be accepted or rejected in the case of resource limitations (typically used for admission control of GBR traffic) [1].
In the 5G network, when UE prepares to subscribe to a specific QoS, the sent request will arrive at NG-RAN (Next Generation Radio Access Network) firstly, then NG-RAN will direct the request to anchor/center UPF. The anchor/center UPF will dispatch traffic to the appropriate UPF(s) according to the interaction with SMF. Refer to TS (technical specification) 23.501 [1], UPF handles the user plane path of PDU Sessions, a single UPF or multiple UPFs for a given PDU Session deployment is supported, and UPF selection is performed by SMF. And the UPF provides the features like traffic detection, traffic reporting, QoS enforcement, and traffic routing [1].
The SMF is responsible of checking whether the UE requests are compliant with the user subscription, and the subscription data includes the allowed PDU Session Types and the default PDU Session Type, the static IP address/prefix, QoS information (e.g. subscribed Session-AMBR, Default 5QI and Default ARP), security policy and so on [1]. The SMF provides the User Location Information, access type and the UE Time Zone to Policy Control Function (PCF), and can interact with AMF for obtaining the access authentication and authorization information.
The AMF provides functionalities such as access authentication and authorization, network slice-specific authentication and authorization, mobility management, reachability connection management, and information like UE corresponding Time Zone etc. [1]. At the same time, AMF is responsible of selecting the SMF per procedures.
In the internal network function is required to have the data collection and analytics reporting capabilities for discovering network status. The NWDAF represents network analytics logical function which will collect data from AFs, NFs, and OAM, then evaluates services and predict QoS changes.
When mentioned 5G network performance, Network Slicing is the key concept worth introducing. Network Slicing allows the allocation of the required features and resources from the available network functions to different services, and the NSSF is the function that assists in the selection of suitable network slice instances for users, and in the allocation of the necessary AMF [2]. The NSSF combines the local network policies, subscription changes and/or UE mobility, operational reasons to provide the available network slices selection solution for UE.
The NEF supports exposure of network functions capabilities for external party. The exposure functions include Monitoring capability, Provisioning capability, Policy/Charing capability and Analytics reporting capability [1]. The monitoring capability can be used for exposing UE's mobility management context such as UE location, reachability, roaming status, and loss of connectivity. When MonitoringEvent API (API detail refers to 3GPP TS 29.122 [3]) detects the subscribed event changes, it will report the specific event notifications, and NEF will forward the notification to UE. The Policy/Charing capability can be used for specific QoS or priority handling for the session of the UE and for setting applicable charging party or charging rate.
From the 3GPP TS 29.522 [4], 5G NEF will reuse the AsSessionWithQoS API, this API allows the SCS/AS to setup a session for NEF with required QoS based on the requirement. The 3GPP TS 29.122 [3] introduces the details of AsSessionWithQoS API, the API supports reading the active configurations of subscription, or creating a new QoS session, or deleting an existing QoS session, or sending notifications about grouping configuration result to the SCS/AS.
With the 5G system architectural significant evolution, Mobile Edge Computing (MEC) technology brings applications from centralized data centers down to the network edge, enables services to be deployed locally, in short-range, and in distribution manner. MEC technology caters to the critical 5G network business demand of high capacity, low power consumption, huge amounts of connections, ultra-reliable low latency.
In the coming future, massive and diverse devices will access to 5G network, applications with different characteristics may require superior performance to ensure the quality of experience. The promising intelligent systems such as unmanned cars, VR/AR (virtual reality/Augmented Reality) applications are on the opportunities benefit from MEC and 5G system collaboratively interaction. The AsSessionWithQoS API can be used by AF to apply better QoS for a UE to communicate with specific applications.
To simplify the e2e (end to end) QoS procedure, UE side may raise the requirement that the NEF should provide QoS query service so that UE and AF can use the query service to get UE's allowed QoS service. The query result may include below QoS characteristics information for a specific UE. This QoS characteristics information is provisioned into operator network. For example, this information is provisioned to NEF, NEF store the QoS characteristics information per UE.
QoS characteristics information for a specific UE may comprise at least one of:
GFBR: Guaranteed Flow Bit Rate, optional parameter, for the GBR QoS Flow;
MFBR: Maximum Flow Bit Rate, optional parameter, for the GBR QoS Flow;
Time window: the available period for subscribing QoS, such as specifying the “start-time” and “end-time”.
After UE or AF get the QoS characteristics information from NEF, UE or AF can based on the information to decide if further QoS change should be triggered. UE side may consider solutions to allow UE to directly use AsSessionWithQoS API to change the QoS for a UE to communicate with specific applications.
Combined with the real MEC deployment, various UE(s) are moving from different locations during different periods, along with the changes, the network may not be able to always provide the same QoS for the UE(s) to communicate with specific applications.
Some exemplary scenarios may be listed as below:
In 3GPP TS 23.558 [5], UE identifier API is used to obtain the unique identifier of UE, the identifier is also called Edge UE ID, through the UE identifier can get the UE location. When location changes happened, the MonitoringEvent API will detect subscribed event changes and send notifications to UE [3].
Therefore, the QoS level requested by the UE is not always available. Further, it is hard for UE to be aware of whether the available QoS level is already changed.
Some of the applications may demand a specific quality of service (QoS) for a better user experience, then companies providing such applications will come to network carriers/operators for solutions. The network operators provision the demanded QoS through UPF, SMF, AMF interaction, when running the specific applications, the subscribed QoS takes effect.
In the non-MEC network, QCI is 6 or 7 in general (for the common business, e.g. interactive gaming), and the maximum QCI is 9 (for buffered streaming). Therefore, in the non-MEC QoS subscription solution, the services maximum QCI will not exceed 9.
As illustrated in
The central 5G Core Network may include further network nodes, such as UDM 4, AMF 6, PCF 6, and SMF 7, etc.
For example, in the 5G network, specific critical applications such as IoT services, intelligent transport systems will emphasize low latency more than ever, thus carriers think highly of providing excellent QoS to occupy the market. Therefore, MEC deployment has become an inevitable tendency in the future. Edge nodes will be deployed at the edge and close to the data source, aim at effectively reducing the bandwidth burden of the backhaul network, then carriers can provide different ideal QoS information. And UE is also allowed to subscribe the registered QoS in the non-MEC environment. The requirement comes from UE side and content service provider that UE and AF should know the available QoS options before making decisions. However, there is no provided API for UE to get the available QoS information.
Considering several UE mobility scenarios, for example, UE moves from non-MEC-covered province A to MEC-covered province B, or UE moves from MEC-covered city A to another MEC-covered city B, even the device use the same service, but the QoS information could be different along with the location changes or network status changes. The effect factors (e.g. available period, UE location, network resources) can be enumerated a lot, but the urgent problem is without a way to detect these factors changes and then return the current available QoS information query results.
To sum up, some problems may be listed as below:
There is no existing way to query available QoS information now, 5G NEF does not provide such an API (application programming interface).
The AsSessionWithQoS API only provides a way to read the active configuration of subscription, but without an existing way to query the available QoS information.
The UE or AF can't expect what QoS can be gained before launch a service for UE. When UE or AF applies a specific QoS and the subscription cannot be satisfied and rejected by network, UE will retry again and again through accessing the AsSessionWithQoS API when the API is provided. The keeping retry of UE or AF will cause the waste of network resources and bring complexity on UE or AF to fulfill the e2e use case.
Refer to
Further, the factors (e.g. operator policy, device types, network status, network congestion, available access period) changes will impact on the available QoS information query result. There is no existing way to detect factors' changes then return the current available QoS information query results.
When UE is moving from different locations, even the same QoS information will be varied according to the factors (e.g. operator policy, device types, network status, network congestion, available access period) changes.
Therefore, supposed that if a network node (such as a NEF) provides a query service for UE and/or AF to precisely know the available QoS information under these factors changes, it will take full advantage of network resources and UE could avoid meaningless retry operations.
The embodiments of the present disclosure provide such solutions for a network node to provide the query service.
As shown in
According to embodiments of the present disclosure, the first network node will provide information about QoS dynamically, upon the request about QoS information for a terminal device.
In exemplary embodiments of the present disclosure, alternatively or additionally, the QoS information for the terminal device may be determined based at least on a location of the terminal device and/or a network status and/or device subscription information.
In exemplary embodiments of the present disclosure, the request may comprise at least one of: an internet protocol address of the terminal device, a QoS service name, an Access Point Name, APN, and/or a data network name, DNN.
As shown in
According to embodiments of the present disclosure, the changeable internet protocol address of the terminal device may be mapped to a unique identifier of the terminal device. The unique identifier of the terminal device may be used to locate the terminal device. Then, locally available QoS information may be provided based on the location of the terminal device.
In exemplary embodiments of the present disclosure, the location of the terminal device is obtained, based on a mapping relationship between the location and an internet protocol address range including the internet protocol address of the terminal device.
Namely, the first network node may also obtain the location of the terminal device based on IP address directly. For example, the operator will define IP address range for different location area.
In exemplary embodiments of the present disclosure, the identifier of the terminal device may comprise a generic public subscription identifier, GPSI, or an international mobile subscriber identity, IMSI, or a subscription permanent identifier, SUPI.
In exemplary embodiments of the present disclosure, the first network node may obtain the location of the terminal device from a unified data management, UDM, and/or an access and mobility management function, AMF, and/or Gateway Mobile Location Centre, GMLC.
Further, in exemplary embodiments of the present disclosure, the first network node may obtain the location of the terminal device from a unified data management, UDM, and/or an access and mobility management function, AMF, and/or Gateway Mobile Location Centre, GMLC, based on terminal device IP address or identifier of the terminal device.
In exemplary embodiments of the present disclosure, the first network node may obtain the network status from a network data analytics function, NWDAF. The network status may comprise information about network resources, and/or congestion status.
In exemplary embodiments of the present disclosure, the first network node may determine the QoS information for the terminal device, based further on a policy and charging control rule, PCC rule, and/or a single network slice selection assistance information, NSSAI, and/or the location of the terminal device, and/or the network status, and/or an available period/time.
In exemplary embodiments of the present disclosure, the first network node may obtain the PCC rule, from a policy control function, PCF.
In exemplary embodiments of the present disclosure, the first network node may obtain the NSSAI from a unified data repository, UDR, and/or a network slice selection function, NSSF.
In exemplary embodiments of the present disclosure, the first network node may determine the QoS information, by applying a predetermined policy about a relationship between the QoS information for the terminal device, and the location of the terminal device and/or the network status, and/or a device type of the terminal device, and/or a device subscription for the terminal device. The device subscription for the terminal device may comprise a mapping relationship between the location of the terminal device and the QoS information.
The QoS rule may be predefined in the user subscription. For example, there may be a subscription: if user is located in a specific city, the user will gain the better QoS).
In exemplary embodiments of the present disclosure, the determined QoS information comprise QoS characteristics available for the terminal device.
In exemplary embodiments of the present disclosure, the QoS characteristics may comprise at least one of: 5G QoS Identifier, 5QI; QoS Class Identifier, QCI; Allocation and Retention Priority, ARP; Network Slice Selection Assistance Information, NSSAI; Guaranteed Flow Bit Rate, GFBR; Maximum Flow Bit Rate, MFBR; Maximum Packet Loss Rate; per Session Aggregate Maximum Bit Rate, Session-AMBR; Aggregate Maximum Bit Rate, AMBR; Reflective QoS Attribute, RQA; Notification control; QoS Flow ID, QFI; and/or QoS Rules. The determined QoS information may further comprise a specific location area for the QoS characteristics.
In exemplary embodiments of the present disclosure, the determined QoS information may further comprise: an available time window and/or an available location area for the QoS characteristics. The determined QoS information may further comprise: a current location area of the terminal device.
In exemplary embodiments of the present disclosure, the request comprises a subscription of a notification about change of the QoS information.
For example, if NEF detects location changes and/or combines other factors. The NEF may proactively notify terminal device. Namely, a NEF API may detect changes and proactively notify terminal devices (like phone, watch, car) at the same time.
In exemplary embodiments of the present disclosure, the first network node may receive the request from the terminal device, or a second network node severing the terminal device.
In exemplary embodiments of the present disclosure, the first network node may comprise a network exposure function, NEF. The first network node receives the request from the terminal device, directly or via another network node.
According to embodiments for the present disclosure, a first network node (such as NEF) may provide the ability for another network node or a terminal device to query the QoS information.
As shown in
The second network node may be any network node serving/managing the terminal device, such as an AF.
As shown in
According to embodiments of the present disclosure, the second network node and/or the terminal device may know about QoS information changes dynamically, and better utilization of network resources may be achieved.
In exemplary embodiments of the present disclosure, the request may comprise at least one of: an internet protocol address of the terminal device, an Access Point Name, APN, and/or a QoS service name, or a data network name, DNN.
In exemplary embodiments of the present disclosure, the determined QoS information comprise QoS characteristics available for the terminal device.
In exemplary embodiments of the present disclosure, the QoS characteristics comprise at least one of: 5G QoS Identifier, 5QI; QoS Class Identifier, QCI; Allocation and Retention Priority, ARP; Network Slice Selection Assistance Information, NSSAI; Guaranteed Flow Bit Rate, GFBR; Maximum Flow Bit Rate, MFBR; Maximum Packet Loss Rate; per Session Aggregate Maximum Bit Rate, Session-AMBR; Aggregate Maximum Bit Rate, AMBR; Reflective QoS Attribute, RQA; Notification control; QoS Flow ID, QFI; and/or QoS Rules. The determined QoS information may further comprise a specific location area for the QoS characteristics.
In exemplary embodiments of the present disclosure, the determined QoS information may further comprise: an available time window and/or an available location area for the QoS characteristics, and/or a current location area of the terminal device.
In exemplary embodiments of the present disclosure, the second network node may be severing the terminal device, and may transmit the request to a first network node.
In exemplary embodiments of the present disclosure, the terminal device may transmit the request to a first network node, directly or via another network node.
In exemplary embodiments of the present disclosure, the first network node may comprise a network exposure function, NEF.
According to embodiments of the present disclosure, in step S1, a terminal device 3 (such as UE) or a second network node (such as AF 2, AS 9, or any core network node, which serves/manages the terminal device) will query a new API to get available QoS information.
For example, a first network node (such as a NEF 1) may be extended with a new API (such as a 5G NEF API), which provides QoS characteristics or information query service. It allows to query the QoS information like 5QI, ARP, NSSAI (Network Slice Selection Assistance Information), etc. The input parameters of the new API including UE IP address, QoS service name and/or DNN, etc.
UE side may consider solution that how does UE communicate with NEF 1 based on TCP/HTTP protocol. Also UE side may define the API to query UE's static/pre-provisioned QoS characteristics information. Such manner may be based on UE side's solution, extend the existing API or define a new API for UE to query the dynamical QoS characteristics information.
In step S2, location query, NEF 1 will use the UE IP address to identify the UE, find the UE location from UDM 4 and/or AMF 5 and detect the UE anchored UPF (such as C-UPF 8).
NEF UE Information API supports UE IP address translation to UE GPSI and/or IMSI and/or SUPI, also provides the UE anchored UPF information.
NEF MONTE API can provide location of UE based on UE GPSI, and/or IMSI and/or SUPI. NEF can use MONTE API to get UE location from UDM and/or AMF. Optionally, NEF can also use MONTE API to get UE location from GMLC instead of UDM+AMF.
In step S3, Network status query, NEF 1 will query NWDAF 13 to obtain the network status data analysis. NWDAF 13 can provide the network congestion information and predict QoS changes.
In step S4, NSSAI query, NEF 1 will query NSSF and/or UDR 12 to get the available network slice selection information. NSSF or UDR 12 can/may return the available network slice selections.
Further, in an additional step, PCF query, NEF 1 may also query PCF 6 to get the available QoS PCC rule based on the UE status, e.g. location, time window and congestion information.
In step S5, Policy enforcement for QoS decision/determination, based on a combination of the operator policy, UE location, analytics data, and available NSSAI information, NEF 1 will generate the available QoS information.
From the above mentioned, NEF UE Information API will provide the location information and NWDAF 13 will provide the network congestion level.
For example, an operator may maintain a “MECSubscription” service subscription table as below table 1. When UE subscribed the “MECSubscription” service, QCI is 7 and Bandwidth is 1M by default.
When UE located in Guangzhou MEC covered place and the current network congestion level is “Low”, from the query result QCI is 1 and Bandwidth is 10M.
When UE located in Guangzhou MEC covered place, but the current network congestion level is “High”, from the query result QCI is 6 and Bandwidth is 2M.
When UE moved to Beijing MEC covered place and the current network congestion level is “Low”, from the query result QCI is 2 and Bandwidth is 6M.
NSSF or UDR 12 may provide the available NSSAI information, correspondingly.
Following the above example, if UE is in Guangzhou MEC covered place with low network congestion, and UDR store the available “NSSAI=MECNSSAI”, then NEF will get the available QoS information “QCI=1, Bandwidth=10M, NSSAI=MECNSSAI”.
In step S6, response including available QoS information, the new API may return the necessary information for UE (as listed) and provide the available QoS information, to the AF 2 and/or the UE.
The returned available QoS information determines the type of network characteristics which are available to subscribe for UE, thus the query API output may contain the necessary information, listed as below.
The network characteristics may include any one of:
For another example, time window may include at least one of: available time, available date, time zone/region (like in UTC/GMT, etc.). UTC refers to Universal Time Coordinated, GMT refers to Greenwich mean time.
According to such further detailed embodiments of the present disclosure, API for NEF provides the ability for AF/UE to query the QoS information. NEF will base on Operator policy, UE location, UE anchored UPF, QoS available period and analytics data from NWDAF (e.g. network resources, congestion status) to return the QoS information dynamically.
In summary, according to embodiments of the present disclosure, a method to let UE or AF dynamically know about QoS information changes is provided. The method may achieve better utilization of network resources and further simplify the E2E (end to end) QoS user cases in the MEC environment. At the same time, meaningless QoS API calls would be avoided.
It should also be understood that the embodiment in 5G scenario is just an example without limitation. Any other scenarios, such as 4G, 6G, etc., may be also applicable.
As shown in
In exemplary embodiments of the present disclosure, alternatively or additionally, the QoS information for the terminal device may be determined based at least on a location of the terminal device and/or a network status and/or device subscription information.
In an embodiment of the present disclosure, the first network node is further operative to the method according to any of the above-mentioned embodiments, such as shown in
As shown in
In an embodiment of the present disclosure, the second network node is further operative to the method according to any of the above-mentioned embodiments, such as shown in
As shown in
In an embodiment of the present disclosure, the terminal device is further operative to the method according to any of the above-mentioned embodiments, such as shown in
The processors 701, 721, 731 may be any kind of processing component, such as one or more microprocessor or microcontrollers, as well as other digital hardware, which may include digital signal processors (DSPs), special-purpose digital logic, and the like. The memories 702, 722, 732 may be any kind of storage component, such as read-only memory (ROM), random-access memory, cache memory, flash memory devices, optical storage devices, etc.
As shown in
The computer readable storage medium 800 may be configured to include memory such as RAM, ROM, programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), magnetic disks, optical disks, floppy disks, hard disks, removable cartridges, or flash drives.
As shown in
In exemplary embodiments of the present disclosure, alternatively or additionally, the QoS information for the terminal device may be determined based at least on a location of the terminal device and/or a network status and/or device subscription information.
In an embodiment of the present disclosure, the first network node may be further operative to the method according to any of the above-mentioned embodiments, such as shown in
As shown in
In an embodiment of the present disclosure, the second network node may be further operative to the method according to any of the above-mentioned embodiments, such as shown in
As shown in
In an embodiment of the present disclosure, the terminal device may be further operative to the method according to any of the above-mentioned embodiments, such as shown in
The term unit may have conventional meaning in the field of electronics, electrical devices and/or electronic devices and may include, for example, electrical and/or electronic circuitry, devices, modules, processors, memories, logic solid state and/or discrete devices, computer programs or instructions for carrying out respective tasks, procedures, computations, outputs, and/or displaying functions, and so on, as such as those that are described herein.
With function units, the terminal device or network node may not need a fixed processor or memory, any computing resource and storage resource may be arranged from at least one network node, or terminal device in the communication system. The introduction of virtualization technology and network computing technology may improve the usage efficiency of the network resources and the flexibility of the network.
Further, the exemplary overall commutation system including the terminal device and the network node (the first network node and/or the second network node, and/or other network nodes) will be introduced as below.
Embodiments of the present disclosure provide a communication system including a host computer. The host computer may include a processing circuitry configured to provide user data; and a communication interface configured to forward the user data to a cellular network for transmission to a terminal device. The cellular network includes a network node above mentioned, and/or the terminal device is above mentioned.
In embodiments of the present disclosure, the system further includes the terminal device, wherein the terminal device is configured to communicate with the network node.
In embodiments of the present disclosure, the processing circuitry of the host computer is configured to execute a host application, thereby providing the user data; and the terminal device includes processing circuitry configured to execute a client application associated with the host application.
Embodiments of the present disclosure also provide a communication system including a host computer including: a communication interface configured to receive user data originating from a transmission from a terminal device; a network node. The transmission is from the terminal device to the network node. The network node is above mentioned, and/or the terminal device is above mentioned.
In embodiments of the present disclosure, the processing circuitry of the host computer is configured to execute a host application. The terminal device is configured to execute a client application associated with the host application, thereby providing the user data to be received by the host computer.
Although the subject matter described herein may be implemented in any appropriate type of system using any suitable components, the embodiments disclosed herein are described in relation to a wireless network, such as the example wireless network illustrated in
The wireless network may comprise and/or interface with any type of communication, telecommunication, data, cellular, and/or radio network or other similar type of system. In some embodiments, the wireless network may be configured to operate according to specific standards or other types of predefined rules or procedures. Thus, particular embodiments of the wireless network may implement communication standards, such as Global System for Mobile Communications (GSM), Universal Mobile Telecommunications System (UMTS), Long Term Evolution (LTE), and/or other suitable 2G, 3G, 4G, or 5G standards; wireless local area network (WLAN) standards, such as the IEEE 802.11 standards; and/or any other appropriate wireless communication standard, such as the Worldwide Interoperability for Microwave Access (WiMax), Bluetooth, Z-Wave and/or ZigBee standards.
Network 1006 may comprise one or more backhaul networks, core networks, IP networks, public switched telephone networks (PSTNs), packet data networks, optical networks, wide-area networks (WANs), local area networks (LANs), wireless local area networks (WLANs), wired networks, wireless networks, metropolitan area networks, and other networks to enable communication between devices.
Network node 1060 and WD 1010 comprise various components described in more detail below. These components work together in order to provide network node and/or wireless device functionality, such as providing wireless connections in a wireless network. In different embodiments, the wireless network may comprise any number of wired or wireless networks, network nodes, base stations, controllers, wireless devices, relay stations, and/or any other components or systems that may facilitate or participate in the communication of data and/or signals whether via wired or wireless connections.
As used herein, network node refers to equipment capable, configured, arranged and/or operable to communicate directly or indirectly with a wireless device and/or with other network nodes or equipment in the wireless network to enable and/or provide wireless access to the wireless device and/or to perform other functions (e.g., administration) in the wireless network. Examples of network nodes include, but are not limited to, access points (APs) (e.g., radio access points), base stations (BSs) (e.g., radio base stations, Node Bs, evolved Node Bs (eNBs) and NR NodeBs (gNBs)). Base stations may be categorized based on the amount of coverage they provide (or, stated differently, their transmit power level) and may then also be referred to as femto base stations, pico base stations, micro base stations, or macro base stations. A base station may be a relay node or a relay donor node controlling a relay. A network node may also include one or more (or all) parts of a distributed radio base station such as centralized digital units and/or remote radio units (RRUs), sometimes referred to as Remote Radio Heads (RRHs). Such remote radio units may or may not be integrated with an antenna as an antenna integrated radio. Parts of a distributed radio base station may also be referred to as nodes in a distributed antenna system (DAS). Yet further examples of network nodes include multi-standard radio (MSR) equipment such as MSR BSs, network controllers such as radio network controllers (RNCs) or base station controllers (BSCs), base transceiver stations (BTSs), transmission points, transmission nodes, multi-cell/multicast coordination entities (MCEs), core network nodes (e.g., MSCs, MMEs), O&M nodes, OSS nodes, SON nodes, positioning nodes (e.g., E-SMLCs), and/or MDTs. As another example, a network node may be a virtual network node as described in more detail below. More generally, however, network nodes may represent any suitable device (or group of devices) capable, configured, arranged, and/or operable to enable and/or provide a wireless device with access to the wireless network or to provide some service to a wireless device that has accessed the wireless network.
In
Similarly, network node 1060 may be composed of multiple physically separate components (e.g., a NodeB component and a RNC component, or a BTS component and a BSC component, etc.), which may each have their own respective components. In certain scenarios in which network node 1060 comprises multiple separate components (e.g., BTS and BSC components), one or more of the separate components may be shared among several network nodes. For example, a single RNC may control multiple NodeB's. In such a scenario, each unique NodeB and RNC pair, may in some instances be considered a single separate network node. In some embodiments, network node 1060 may be configured to support multiple radio access technologies (RATs). In such embodiments, some components may be duplicated (e.g., separate device readable medium 1080 for the different RATs) and some components may be reused (e.g., the same antenna 1062 may be shared by the RATs). Network node 1060 may also include multiple sets of the various illustrated components for different wireless technologies integrated into network node 1060, such as, for example, GSM, WCDMA, LTE, NR, WiFi, or Bluetooth wireless technologies. These wireless technologies may be integrated into the same or different chip or set of chips and other components within network node 1060.
Processing circuitry 1070 is configured to perform any determining, calculating, or similar operations (e.g., certain obtaining operations) described herein as being provided by a network node. These operations performed by processing circuitry 1070 may include processing information obtained by processing circuitry 1070 by, for example, converting the obtained information into other information, comparing the obtained information or converted information to information stored in the network node, and/or performing one or more operations based on the obtained information or converted information, and as a result of said processing making a determination.
Processing circuitry 1070 may comprise a combination of one or more of a microprocessor, controller, microcontroller, central processing unit, digital signal processor, application-specific integrated circuit, field programmable gate array, or any other suitable computing device, resource, or combination of hardware, software and/or encoded logic operable to provide, either alone or in conjunction with other network node 1060 components, such as device readable medium 1080, network node 1060 functionality. For example, processing circuitry 1070 may execute instructions stored in device readable medium 1080 or in memory within processing circuitry 1070. Such functionality may include providing any of the various wireless features, functions, or benefits discussed herein. In some embodiments, processing circuitry 1070 may include a system on a chip (SOC).
In some embodiments, processing circuitry 1070 may include one or more of radio frequency (RF) transceiver circuitry 1072 and baseband processing circuitry 1074. In some embodiments, radio frequency (RF) transceiver circuitry 1072 and baseband processing circuitry 1074 may be on separate chips (or sets of chips), boards, or units, such as radio units and digital units. In alternative embodiments, part or all of RF transceiver circuitry 1072 and baseband processing circuitry 1074 may be on the same chip or set of chips, boards, or units
In certain embodiments, some or all of the functionality described herein as being provided by a network node, base station, eNB or other such network device may be performed by processing circuitry 1070 executing instructions stored on device readable medium 1080 or memory within processing circuitry 1070. In alternative embodiments, some or all of the functionality may be provided by processing circuitry 1070 without executing instructions stored on a separate or discrete device readable medium, such as in a hard-wired manner. In any of those embodiments, whether executing instructions stored on a device readable storage medium or not, processing circuitry 1070 can be configured to perform the described functionality. The benefits provided by such functionality are not limited to processing circuitry 1070 alone or to other components of network node 1060, but are enjoyed by network node 1060 as a whole, and/or by end users and the wireless network generally.
Device readable medium 1080 may comprise any form of volatile or non-volatile computer readable memory including, without limitation, persistent storage, solid-state memory, remotely mounted memory, magnetic media, optical media, random access memory (RAM), read-only memory (ROM), mass storage media (for example, a hard disk), removable storage media (for example, a flash drive, a Compact Disk (CD) or a Digital Video Disk (DVD)), and/or any other volatile or non-volatile, non-transitory device readable and/or computer-executable memory devices that store information, data, and/or instructions that may be used by processing circuitry 1070. Device readable medium 1080 may store any suitable instructions, data or information, including a computer program, software, an application including one or more of logic, rules, code, tables, etc. and/or other instructions capable of being executed by processing circuitry 1070 and, utilized by network node 1060. Device readable medium 1080 may be used to store any calculations made by processing circuitry 1070 and/or any data received via interface 1090. In some embodiments, processing circuitry 1070 and device readable medium 1080 may be considered to be integrated.
Interface 1090 is used in the wired or wireless communication of signalling and/or data between network node 1060, network 1006, and/or WDs 1010. As illustrated, interface 1090 comprises port(s)/terminal(s) 1094 to transmit and receive data, for example to and from network 1006 over a wired connection. Interface 1090 also includes radio front end circuitry 1092 that may be coupled to, or in certain embodiments a part of, antenna 1062. Radio front end circuitry 1092 comprises filters 1098 and amplifiers 1096. Radio front end circuitry 1092 may be connected to antenna 1062 and processing circuitry 1070. Radio front end circuitry may be configured to condition signals communicated between antenna 1062 and processing circuitry 1070. Radio front end circuitry 1092 may receive digital data that is to be sent out to other network nodes or WDs via a wireless connection. Radio front end circuitry 1092 may convert the digital data into a radio signal having the appropriate channel and bandwidth parameters using a combination of filters 1098 and/or amplifiers 1096. The radio signal may then be transmitted via antenna 1062. Similarly, when receiving data, antenna 1062 may collect radio signals which are then converted into digital data by radio front end circuitry 1092. The digital data may be passed to processing circuitry 1070. In other embodiments, the interface may comprise different components and/or different combinations of components.
In certain alternative embodiments, network node 1060 may not include separate radio front end circuitry 1092, instead, processing circuitry 1070 may comprise radio front end circuitry and may be connected to antenna 1062 without separate radio front end circuitry 1092. Similarly, in some embodiments, all or some of RF transceiver circuitry 1072 may be considered a part of interface 1090. In still other embodiments, interface 1090 may include one or more ports or terminals 1094, radio front end circuitry 1092, and RF transceiver circuitry 1072, as part of a radio unit (not shown), and interface 1090 may communicate with baseband processing circuitry 1074, which is part of a digital unit (not shown).
Antenna 1062 may include one or more antennas, or antenna arrays, configured to transmit and/or receive wireless signals. Antenna 1062 may be coupled to radio front end circuitry 1090 and may be any type of antenna capable of transmitting and receiving data and/or signals wirelessly. In some embodiments, antenna 1062 may comprise one or more omni-directional, sector or panel antennas operable to transmit/receive radio signals between, for example, 2 GHz and 66 GHz. An omni-directional antenna may be used to transmit/receive radio signals in any direction, a sector antenna may be used to transmit/receive radio signals from devices within a particular area, and a panel antenna may be a line of sight antenna used to transmit/receive radio signals in a relatively straight line. In some instances, the use of more than one antenna may be referred to as MIMO. In certain embodiments, antenna 1062 may be separate from network node 1060 and may be connectable to network node 1060 through an interface or port.
Antenna 1062, interface 1090, and/or processing circuitry 1070 may be configured to perform any receiving operations and/or certain obtaining operations described herein as being performed by a network node. Any information, data and/or signals may be received from a wireless device, another network node and/or any other network equipment. Similarly, antenna 1062, interface 1090, and/or processing circuitry 1070 may be configured to perform any transmitting operations described herein as being performed by a network node. Any information, data and/or signals may be transmitted to a wireless device, another network node and/or any other network equipment.
Power circuitry 1087 may comprise, or be coupled to, power management circuitry and is configured to supply the components of network node 1060 with power for performing the functionality described herein. Power circuitry 1087 may receive power from power source 1086. Power source 1086 and/or power circuitry 1087 may be configured to provide power to the various components of network node 1060 in a form suitable for the respective components (e.g., at a voltage and current level needed for each respective component). Power source 1086 may either be included in, or external to, power circuitry 1087 and/or network node 1060. For example, network node 1060 may be connectable to an external power source (e.g., an electricity outlet) via an input circuitry or interface such as an electrical cable, whereby the external power source supplies power to power circuitry 1087. As a further example, power source 1086 may comprise a source of power in the form of a battery or battery pack which is connected to, or integrated in, power circuitry 1087. The battery may provide backup power should the external power source fail. Other types of power sources, such as photovoltaic devices, may also be used.
Alternative embodiments of network node 1060 may include additional components beyond those shown in
As used herein, wireless device (WD) refers to a device capable, configured, arranged and/or operable to communicate wirelessly with network nodes and/or other wireless devices. Unless otherwise noted, the term WD may be used interchangeably herein with user equipment (UE). Communicating wirelessly may involve transmitting and/or receiving wireless signals using electromagnetic waves, radio waves, infrared waves, and/or other types of signals suitable for conveying information through air. In some embodiments, a WD may be configured to transmit and/or receive information without direct human interaction. For instance, a WD may be designed to transmit information to a network on a predetermined schedule, when triggered by an internal or external event, or in response to requests from the network. Examples of a WD include, but are not limited to, a smart phone, a mobile phone, a cell phone, a voice over IP (VoIP) phone, a wireless local loop phone, a desktop computer, a personal digital assistant (PDA), a wireless cameras, a gaming console or device, a music storage device, a playback appliance, a wearable terminal device, a wireless endpoint, a mobile station, a tablet, a laptop, a laptop-embedded equipment (LEE), a laptop-mounted equipment (LME), a smart device, a wireless customer-premise equipment (CPE), a vehicle-mounted wireless terminal device, etc. A WD may support device-to-device (D2D) communication, for example by implementing a 3GPP standard for sidelink communication, vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-everything (V2X) and may in this case be referred to as a D2D communication device. As yet another specific example, in an Internet of Things (IoT) scenario, a WD may represent a machine or other device that performs monitoring and/or measurements, and transmits the results of such monitoring and/or measurements to another WD and/or a network node. The WD may in this case be a machine-to-machine (M2M) device, which may in a 3GPP context be referred to as an MTC device. As one particular example, the WD may be a UE implementing the 3GPP narrow band internet of things (NB-IoT) standard. Particular examples of such machines or devices are sensors, metering devices such as power meters, industrial machinery, or home or personal appliances (e.g. refrigerators, televisions, etc.) personal wearables (e.g., watches, fitness trackers, etc.). In other scenarios, a WD may represent a vehicle or other equipment that is capable of monitoring and/or reporting on its operational status or other functions associated with its operation. A WD as described above may represent the endpoint of a wireless connection, in which case the device may be referred to as a wireless terminal. Furthermore, a WD as described above may be mobile, in which case it may also be referred to as a mobile device or a mobile terminal.
As illustrated, wireless device 1010 includes antenna 1011, interface 1014, processing circuitry 1020, device readable medium 1030, user interface equipment 1032, auxiliary equipment 1034, power source 1036 and power circuitry 1037. WD 1010 may include multiple sets of one or more of the illustrated components for different wireless technologies supported by WD 1010, such as, for example, GSM, WCDMA, LTE, NR, WiFi, WiMAX, or Bluetooth wireless technologies, just to mention a few. These wireless technologies may be integrated into the same or different chips or set of chips as other components within WD 1010.
Antenna 1011 may include one or more antennas or antenna arrays, configured to transmit and/or receive wireless signals, and is connected to interface 1014. In certain alternative embodiments, antenna 1011 may be separate from WD 1010 and be connectable to WD 1010 through an interface or port. Antenna 1011, interface 1014, and/or processing circuitry 1020 may be configured to perform any receiving or transmitting operations described herein as being performed by a WD. Any information, data and/or signals may be received from a network node and/or another WD. In some embodiments, radio front end circuitry and/or antenna 1011 may be considered an interface.
As illustrated, interface 1014 comprises radio front end circuitry 1012 and antenna 1011. Radio front end circuitry 1012 comprise one or more filters 1018 and amplifiers 1016. Radio front end circuitry 1014 is connected to antenna 1011 and processing circuitry 1020, and is configured to condition signals communicated between antenna 1011 and processing circuitry 1020. Radio front end circuitry 1012 may be coupled to or a part of antenna 1011. In some embodiments, WD 1010 may not include separate radio front end circuitry 1012; rather, processing circuitry 1020 may comprise radio front end circuitry and may be connected to antenna 1011. Similarly, in some embodiments, some or all of RF transceiver circuitry 1022 may be considered a part of interface 1014. Radio front end circuitry 1012 may receive digital data that is to be sent out to other network nodes or WDs via a wireless connection. Radio front end circuitry 1012 may convert the digital data into a radio signal having the appropriate channel and bandwidth parameters using a combination of filters 1018 and/or amplifiers 1016. The radio signal may then be transmitted via antenna 1011. Similarly, when receiving data, antenna 1011 may collect radio signals which are then converted into digital data by radio front end circuitry 1012. The digital data may be passed to processing circuitry 1020. In other embodiments, the interface may comprise different components and/or different combinations of components.
Processing circuitry 1020 may comprise a combination of one or more of a microprocessor, controller, microcontroller, central processing unit, digital signal processor, application-specific integrated circuit, field programmable gate array, or any other suitable computing device, resource, or combination of hardware, software, and/or encoded logic operable to provide, either alone or in conjunction with other WD 1010 components, such as device readable medium 1030, WD 1010 functionality. Such functionality may include providing any of the various wireless features or benefits discussed herein. For example, processing circuitry 1020 may execute instructions stored in device readable medium 1030 or in memory within processing circuitry 1020 to provide the functionality disclosed herein.
As illustrated, processing circuitry 1020 includes one or more of RF transceiver circuitry 1022, baseband processing circuitry 1024, and application processing circuitry 1026. In other embodiments, the processing circuitry may comprise different components and/or different combinations of components. In certain embodiments processing circuitry 1020 of WD 1010 may comprise a SOC. In some embodiments, RF transceiver circuitry 1022, baseband processing circuitry 1024, and application processing circuitry 1026 may be on separate chips or sets of chips. In alternative embodiments, part or all of baseband processing circuitry 1024 and application processing circuitry 1026 may be combined into one chip or set of chips, and RF transceiver circuitry 1022 may be on a separate chip or set of chips. In still alternative embodiments, part or all of RF transceiver circuitry 1022 and baseband processing circuitry 1024 may be on the same chip or set of chips, and application processing circuitry 1026 may be on a separate chip or set of chips. In yet other alternative embodiments, part or all of RF transceiver circuitry 1022, baseband processing circuitry 1024, and application processing circuitry 1026 may be combined in the same chip or set of chips. In some embodiments, RF transceiver circuitry 1022 may be a part of interface 1014. RF transceiver circuitry 1022 may condition RF signals for processing circuitry 1020.
In certain embodiments, some or all of the functionality described herein as being performed by a WD may be provided by processing circuitry 1020 executing instructions stored on device readable medium 1030, which in certain embodiments may be a computer-readable storage medium. In alternative embodiments, some or all of the functionality may be provided by processing circuitry 1020 without executing instructions stored on a separate or discrete device readable storage medium, such as in a hard-wired manner. In any of those particular embodiments, whether executing instructions stored on a device readable storage medium or not, processing circuitry 1020 can be configured to perform the described functionality. The benefits provided by such functionality are not limited to processing circuitry 1020 alone or to other components of WD 1010, but are enjoyed by WD 1010 as a whole, and/or by end users and the wireless network generally.
Processing circuitry 1020 may be configured to perform any determining, calculating, or similar operations (e.g., certain obtaining operations) described herein as being performed by a WD. These operations, as performed by processing circuitry 1020, may include processing information obtained by processing circuitry 1020 by, for example, converting the obtained information into other information, comparing the obtained information or converted information to information stored by WD 1010, and/or performing one or more operations based on the obtained information or converted information, and as a result of said processing making a determination.
Device readable medium 1030 may be operable to store a computer program, software, an application including one or more of logic, rules, code, tables, etc. and/or other instructions capable of being executed by processing circuitry 1020. Device readable medium 1030 may include computer memory (e.g., Random Access Memory (RAM) or Read Only Memory (ROM)), mass storage media (e.g., a hard disk), removable storage media (e.g., a Compact Disk (CD) or a Digital Video Disk (DVD)), and/or any other volatile or non-volatile, non-transitory device readable and/or computer executable memory devices that store information, data, and/or instructions that may be used by processing circuitry 1020. In some embodiments, processing circuitry 1020 and device readable medium 1030 may be considered to be integrated.
User interface equipment 1032 may provide components that allow for a human user to interact with WD 1010. Such interaction may be of many forms, such as visual, audial, tactile, etc. User interface equipment 1032 may be operable to produce output to the user and to allow the user to provide input to WD 1010. The type of interaction may vary depending on the type of user interface equipment 1032 installed in WD 1010. For example, if WD 1010 is a smart phone, the interaction may be via a touch screen; if WD 1010 is a smart meter, the interaction may be through a screen that provides usage (e.g., the number of gallons used) or a speaker that provides an audible alert (e.g., if smoke is detected). User interface equipment 1032 may include input interfaces, devices and circuits, and output interfaces, devices and circuits. User interface equipment 1032 is configured to allow input of information into WD 1010, and is connected to processing circuitry 1020 to allow processing circuitry 1020 to process the input information. User interface equipment 1032 may include, for example, a microphone, a proximity or other sensor, keys/buttons, a touch display, one or more cameras, a USB port, or other input circuitry. User interface equipment 1032 is also configured to allow output of information from WD 1010, and to allow processing circuitry 1020 to output information from WD 1010. User interface equipment 1032 may include, for example, a speaker, a display, vibrating circuitry, a USB port, a headphone interface, or other output circuitry. Using one or more input and output interfaces, devices, and circuits, of user interface equipment 1032, WD 1010 may communicate with end users and/or the wireless network, and allow them to benefit from the functionality described herein.
Auxiliary equipment 1034 is operable to provide more specific functionality which may not be generally performed by WDs. This may comprise specialized sensors for doing measurements for various purposes, interfaces for additional types of communication such as wired communications etc. The inclusion and type of components of auxiliary equipment 1034 may vary depending on the embodiment and/or scenario.
Power source 1036 may, in some embodiments, be in the form of a battery or battery pack. Other types of power sources, such as an external power source (e.g., an electricity outlet), photovoltaic devices or power cells, may also be used. WD 1010 may further comprise power circuitry 1037 for delivering power from power source 1036 to the various parts of WD 1010 which need power from power source 1036 to carry out any functionality described or indicated herein. Power circuitry 1037 may in certain embodiments comprise power management circuitry. Power circuitry 1037 may additionally or alternatively be operable to receive power from an external power source; in which case WD 1010 may be connectable to the external power source (such as an electricity outlet) via input circuitry or an interface such as an electrical power cable. Power circuitry 1037 may also in certain embodiments be operable to deliver power from an external power source to power source 1036. This may be, for example, for the charging of power source 1036. Power circuitry 1037 may perform any formatting, converting, or other modification to the power from power source 1036 to make the power suitable for the respective components of WD 1010 to which power is supplied.
In
In
In the depicted embodiment, input/output interface 1105 may be configured to provide a communication interface to an input device, output device, or input and output device. UE 1100 may be configured to use an output device via input/output interface 1105. An output device may use the same type of interface port as an input device. For example, a USB port may be used to provide input to and output from UE 1100. The output device may be a speaker, a sound card, a video card, a display, a monitor, a printer, an actuator, an emitter, a smartcard, another output device, or any combination thereof. UE 1100 may be configured to use an input device via input/output interface 1105 to allow a user to capture information into UE 1100. The input device may include a touch-sensitive or presence-sensitive display, a camera (e.g., a digital camera, a digital video camera, a web camera, etc.), a microphone, a sensor, a mouse, a trackball, a directional pad, a trackpad, a scroll wheel, a smartcard, and the like. The presence-sensitive display may include a capacitive or resistive touch sensor to sense input from a user. A sensor may be, for instance, an accelerometer, a gyroscope, a tilt sensor, a force sensor, a magnetometer, an optical sensor, a proximity sensor, another like sensor, or any combination thereof. For example, the input device may be an accelerometer, a magnetometer, a digital camera, a microphone, and an optical sensor.
In
RAM 1117 may be configured to interface via bus 1102 to processing circuitry 1101 to provide storage or caching of data or computer instructions during the execution of software programs such as the operating system, application programs, and device drivers. ROM 1119 may be configured to provide computer instructions or data to processing circuitry 1101. For example, ROM 1119 may be configured to store invariant low-level system code or data for basic system functions such as basic input and output (I/O), startup, or reception of keystrokes from a keyboard that are stored in a non-volatile memory. Storage medium 1121 may be configured to include memory such as RAM, ROM, programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), magnetic disks, optical disks, floppy disks, hard disks, removable cartridges, or flash drives. In one example, storage medium 1121 may be configured to include operating system 1123, application program 1125 such as a web browser application, a widget or gadget engine or another application, and data file 1127. Storage medium 1121 may store, for use by UE 1100, any of a variety of various operating systems or combinations of operating systems.
Storage medium 1121 may be configured to include a number of physical drive units, such as redundant array of independent disks (RAID), floppy disk drive, flash memory, USB flash drive, external hard disk drive, thumb drive, pen drive, key drive, high-density digital versatile disc (HD-DVD) optical disc drive, internal hard disk drive, Blu-Ray optical disc drive, holographic digital data storage (HDDS) optical disc drive, external mini-dual in-line memory module (DIMM), synchronous dynamic random access memory (SDRAM), external micro-DIMM SDRAM, smartcard memory such as a subscriber identity module or a removable user identity (SIM/RUIM) module, other memory, or any combination thereof. Storage medium 1121 may allow UE 1100 to access computer-executable instructions, application programs or the like, stored on transitory or non-transitory memory media, to off-load data, or to upload data. An article of manufacture, such as one utilizing a communication system may be tangibly embodied in storage medium 1121, which may comprise a device readable medium.
In
In the illustrated embodiment, the communication functions of communication subsystem 1131 may include data communication, voice communication, multimedia communication, short-range communications such as Bluetooth, near-field communication, location-based communication such as the use of the global positioning system (GPS) to determine a location, another like communication function, or any combination thereof. For example, communication subsystem 1131 may include cellular communication, Wi-Fi communication, Bluetooth communication, and GPS communication. Network 1143b may encompass wired and/or wireless networks such as a local-area network (LAN), a wide-area network (WAN), a computer network, a wireless network, a telecommunications network, another like network or any combination thereof. For example, network 1143b may be a cellular network, a Wi-Fi network, and/or a near-field network. Power source 1113 may be configured to provide alternating current (AC) or direct current (DC) power to components of UE 1100.
The features, benefits and/or functions described herein may be implemented in one of the components of UE 1100 or partitioned across multiple components of UE 1100. Further, the features, benefits, and/or functions described herein may be implemented in any combination of hardware, software or firmware. In one example, communication subsystem 1131 may be configured to include any of the components described herein. Further, processing circuitry 1101 may be configured to communicate with any of such components over bus 1102. In another example, any of such components may be represented by program instructions stored in memory that when executed by processing circuitry 1101 perform the corresponding functions described herein. In another example, the functionality of any of such components may be partitioned between processing circuitry 1101 and communication subsystem 1131. In another example, the non-computationally intensive functions of any of such components may be implemented in software or firmware and the computationally intensive functions may be implemented in hardware.
In some embodiments, some or all of the functions described herein may be implemented as virtual components executed by one or more virtual machines implemented in one or more virtual environments 1200 hosted by one or more of hardware nodes 1230. Further, in embodiments in which the virtual node is not a radio access node or does not require radio connectivity (e.g., a core network node), then the network node may be entirely virtualized.
The functions may be implemented by one or more applications 1220 (which may alternatively be called software instances, virtual appliances, network functions, virtual nodes, virtual network functions, etc.) operative to implement some of the features, functions, and/or benefits of some of the embodiments disclosed herein. Applications 1220 are run in virtualization environment 1200 which provides hardware 1230 comprising processing circuitry 1260 and memory 1290. Memory 1290 contains instructions 1295 executable by processing circuitry 1260 whereby application 1220 is operative to provide one or more of the features, benefits, and/or functions disclosed herein.
Virtualization environment 1200, comprises general-purpose or special-purpose network hardware devices 1230 comprising a set of one or more processors or processing circuitry 1260, which may be commercial off-the-shelf (COTS) processors, dedicated Application Specific Integrated Circuits (ASICs), or any other type of processing circuitry including digital or analog hardware components or special purpose processors. Each hardware device may comprise memory 1290-1 which may be non-persistent memory for temporarily storing instructions 1295 or software executed by processing circuitry 1260. Each hardware device may comprise one or more network interface controllers (NICs) 1270, also known as network interface cards, which include physical network interface 1280. Each hardware device may also include non-transitory, persistent, machine-readable storage media 1290-2 having stored therein software 1295 and/or instructions executable by processing circuitry 1260. Software 1295 may include any type of software including software for instantiating one or more virtualization layers 1250 (also referred to as hypervisors), software to execute virtual machines 1240 as well as software allowing it to execute functions, features and/or benefits described in relation with some embodiments described herein.
Virtual machines 1240, comprise virtual processing, virtual memory, virtual networking or interface and virtual storage, and may be run by a corresponding virtualization layer 1250 or hypervisor. Different embodiments of the instance of virtual appliance 1220 may be implemented on one or more of virtual machines 1240, and the implementations may be made in different ways.
During operation, processing circuitry 1260 executes software 1295 to instantiate the hypervisor or virtualization layer 1250, which may sometimes be referred to as a virtual machine monitor (VMM). Virtualization layer 1250 may present a virtual operating platform that appears like networking hardware to virtual machine 1240.
As shown in
Virtualization of the hardware is in some contexts referred to as network function virtualization (NFV). NFV may be used to consolidate many network equipment types onto industry standard high volume server hardware, physical switches, and physical storage, which can be located in data centers, and customer premise equipment.
In the context of NFV, virtual machine 1240 may be a software implementation of a physical machine that runs programs as if they were executing on a physical, non-virtualized machine. Each of virtual machines 1240, and that part of hardware 1230 that executes that virtual machine, be it hardware dedicated to that virtual machine and/or hardware shared by that virtual machine with others of the virtual machines 1240, forms a separate virtual network elements (VNE).
Still in the context of NFV, Virtual Network Function (VNF) is responsible for handling specific network functions that run in one or more virtual machines 1240 on top of hardware networking infrastructure 1230 and corresponds to application 1220 in
In some embodiments, one or more radio units 12200 that each include one or more transmitters 12220 and one or more receivers 12210 may be coupled to one or more antennas 12225. Radio units 12200 may communicate directly with hardware nodes 1230 via one or more appropriate network interfaces and may be used in combination with the virtual components to provide a virtual node with radio capabilities, such as a radio access node or a base station.
In some embodiments, some signalling can be effected with the use of control system 12230 which may alternatively be used for communication between the hardware nodes 1230 and radio units 12200.
With reference to
Telecommunication network 1310 is itself connected to host computer 1330, which may be embodied in the hardware and/or software of a standalone server, a cloud-implemented server, a distributed server or as processing resources in a server farm. Host computer 1330 may be under the ownership or control of a service provider, or may be operated by the service provider or on behalf of the service provider. Connections 1321 and 1322 between telecommunication network 1310 and host computer 1330 may extend directly from core network 1314 to host computer 1330 or may go via an optional intermediate network 1320. Intermediate network 1320 may be one of, or a combination of more than one of, a public, private or hosted network; intermediate network 1320, if any, may be a backbone network or the Internet; in particular, intermediate network 1320 may comprise two or more sub-networks (not shown).
The communication system of
Example implementations, in accordance with an embodiment, of the UE, base station and host computer discussed in the preceding paragraphs will now be described with reference to
Communication system 1400 further includes base station 1420 provided in a telecommunication system and comprising hardware 1425 enabling it to communicate with host computer 1410 and with UE 1430. Hardware 1425 may include communication interface 1426 for setting up and maintaining a wired or wireless connection with an interface of a different communication device of communication system 1400, as well as radio interface 1427 for setting up and maintaining at least wireless connection 1470 with UE 1430 located in a coverage area (not shown in
Communication system 1400 further includes UE 1430 already referred to. Its hardware 1435 may include radio interface 1437 configured to set up and maintain wireless connection 1470 with a base station serving a coverage area in which UE 1430 is currently located. Hardware 1435 of UE 1430 further includes processing circuitry 1438, which may comprise one or more programmable processors, application-specific integrated circuits, field programmable gate arrays or combinations of these (not shown) adapted to execute instructions. UE 1430 further comprises software 1431, which is stored in or accessible by UE 1430 and executable by processing circuitry 1438. Software 1431 includes client application 1432. Client application 1432 may be operable to provide a service to a human or non-human user via UE 1430, with the support of host computer 1410. In host computer 1410, an executing host application 1412 may communicate with the executing client application 1432 via OTT connection 1450 terminating at UE 1430 and host computer 1410. In providing the service to the user, client application 1432 may receive request data from host application 1412 and provide user data in response to the request data. OTT connection 1450 may transfer both the request data and the user data. Client application 1432 may interact with the user to generate the user data that it provides.
It is noted that host computer 1410, base station 1420 and UE 1430 illustrated in
In
Wireless connection 1470 between UE 1430 and base station 1420 is in accordance with the teachings of the embodiments described throughout this disclosure. One or more of the various embodiments improve the performance of OTT services provided to UE 1430 using OTT connection 1450, in which wireless connection 1470 forms the last segment. More precisely, the teachings of these embodiments may improve the latency, and power consumption for a reactivation of the network connection, and thereby provide benefits, such as reduced user waiting time, enhanced rate control.
A measurement procedure may be provided for the purpose of monitoring data rate, latency and other factors on which the one or more embodiments improve. There may further be an optional network functionality for reconfiguring OTT connection 1450 between host computer 1410 and UE 1430, in response to variations in the measurement results. The measurement procedure and/or the network functionality for reconfiguring OTT connection 1450 may be implemented in software 1411 and hardware 1415 of host computer 1410 or in software 1431 and hardware 1435 of UE 1430, or both. In embodiments, sensors (not shown) may be deployed in or in association with communication devices through which OTT connection 1450 passes; the sensors may participate in the measurement procedure by supplying values of the monitored quantities exemplified above, or supplying values of other physical quantities from which software 1411, 1431 may compute or estimate the monitored quantities. The reconfiguring of OTT connection 1450 may include message format, retransmission settings, preferred routing etc.; the reconfiguring need not affect base station 1420, and it may be unknown or imperceptible to base station 1420. Such procedures and functionalities may be known and practiced in the art. In certain embodiments, measurements may involve proprietary UE signaling facilitating host computer 1410′s measurements of throughput, propagation times, latency and the like. The measurements may be implemented in that software 1411 and 1431 causes messages to be transmitted, in particular empty or ‘dummy’ messages, using OTT connection 1450 while it monitors propagation times, errors etc.
The communication system includes a host computer, a base station and a UE which may be those described with reference to
The communication system includes a host computer, a base station and a UE which may be those described with reference to
The communication system includes a host computer, a base station and a UE which may be those described with reference to
The communication system includes a host computer, a base station and a UE which may be those described with reference to
In general, the various exemplary embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. For example, some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software that may be executed by a controller, microprocessor or other computing device, although the disclosure is not limited thereto. While various aspects of the exemplary embodiments of this disclosure may be illustrated and described as block diagrams, flow charts, or using some other pictorial representation, it is well understood that these blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
As such, it should be appreciated that at least some aspects of the exemplary embodiments of the disclosure may be practiced in various components such as integrated circuit chips and modules. It should thus be appreciated that the exemplary embodiments of this disclosure may be realized in an apparatus that is embodied as an integrated circuit, where the integrated circuit may include circuitry (as well as possibly firmware) for embodying at least one or more of a data processor, a digital signal processor, baseband circuitry and radio frequency circuitry that are configurable so as to operate in accordance with the exemplary embodiments of this disclosure.
It should be appreciated that at least some aspects of the exemplary embodiments of the disclosure may be embodied in computer-executable instructions, such as in one or more program modules, executed by one or more computers or other devices. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types when executed by a processor in a computer or other device. The computer executable instructions may be stored on a computer readable medium such as a hard disk, optical disk, removable storage media, solid state memory, RAM, etc. As will be appreciated by those skilled in the art, the functionality of the program modules may be combined or distributed as desired in various embodiments. In addition, the functionality may be embodied in whole or in part in firmware or hardware equivalents such as integrated circuits, field programmable gate arrays (FPGA), and the like.
The present disclosure includes any novel feature or combination of features disclosed herein either explicitly or any generalization thereof. Various modifications and adaptations to the foregoing exemplary embodiments of this disclosure may become apparent to those skilled in the relevant arts in view of the foregoing description, when read in conjunction with the accompanying drawings. However, any and all modifications will still fall within the scope of the non-limiting and exemplary embodiments of this disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| PCT/CN2021/118517 | Sep 2021 | WO | international |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2022/111709 | 8/11/2022 | WO |
