Patent Application
20240163900
Various embodiments generally may relate to the field of wireless communications. For example, some embodiments may relate to scheduling single-DCI-based physical uplink shared channel (PUSCH) transmissions.
Rel-17 fifth generation (5G) new radio (NR) systems support multi-TRP (transmission reception point) transmission schemes in uplink (UL). In particular, to increase the robustness of the transmission against potential blockages of the channel, a user equipment (UE) could transmit signals targeting two or more transmission reception points (TRPs). In the current specification, however, physical uplink shared channel (PUSCH) repetitions are only supported based on a single-TRP, which can be a bottleneck for the reliability of whole system when multi-TRP based PDSCH repetition is adopted. Embodiments of the present disclosure address these and other issues.
Embodiments will be readily understood by the following detailed description in conjunction with the accompanying drawings. To facilitate this description, like reference numerals designate like structural elements. Embodiments are illustrated by way of example and not by way of limitation in the figures of the accompanying drawings.
The following detailed description refers to the accompanying drawings. The same reference numbers may be used in different drawings to identify the same or similar elements. In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular structures, architectures, interfaces, techniques, etc. in order to provide a thorough understanding of the various aspects of various embodiments. However, it will be apparent to those skilled in the art having the benefit of the present disclosure that the various aspects of the various embodiments may be practiced in other examples that depart from these specific details. In certain instances, descriptions of well-known devices, circuits, and methods are omitted so as not to obscure the description of the various embodiments with unnecessary detail. For the purposes of the present document, the phrases “A or B” and “A/B” mean (A), (B), or (A and B).
As introduced above, in the current specification PUSCH repetitions are only supported based on a single-TRP, which can be a bottleneck for the reliability of whole system when multi-TRP based PDSCH repetition is adopted. Embodiments of the present disclosure address these and other issues.
This may be of particular significance in FR2, when a link between a UE and a TRP is affected by a blockage, the PUSCH repetition based on single-TRP would likely not be reliable anymore. However, when repetitive transmissions are performed across multiple links between a UE and multiple TRPs, such repetitions can be more reliable due to macro diversity especially when the blockage exists. Hence multi-TRP based PUCCH/PUSCH repetition should be adopted.
In some embodiments, to support multi-TRP based PUSCH repetition, single-DCI based PUSCH repetitions can be used, as illustrated in
Compared with single-TRP based PUSCH transmissions, multi-TRP based PUSCH repetition can provide more diversity and has more flexibility. For instance, 2-TRP based PUSCH repetition allows the two PUSCHs to be scheduled with different MCSs, resource allocations, PMI, and etc. Considering single-TRP based transmission is used in current NR network, NR network should support dynamic switching between 1-TRP and 2-TRP PUSCH transmissions.
As noted above, in current systems dynamic switching between 1-TRP and 2-TRP PUSCH transmission is not supported. Such systems include single-DCI based multi-TRP PUSCH scheduling without PUSCH repetition. Such current approaches are not flexible enough for PUSCH repetitions. In particular, current systems are not robust enough since PUSCH repetition is not supported under multi-TRP scenarios.
Embodiments described herein, by contrast, provide single-DCI based schemes to schedule PUSCH repetitions under multi-TRP scenarios and the methods of dynamic switching between 1-TRP and 2-TRP. The proposed methods can increase the flexibility and robustness of the PUSCH transmission under current specification.
Embodiments herein provide methods of using single-DCI to schedule PUSCH repetitions under multi-TRP scenarios and methods of 1-TRP/2-TRP dynamic switching using DCI. In multi-TRP PUSCH transmissions, the UE can transmit the same information in multiple PUSCH repetitions to multiple TRPs with different beams to achieve spatial diversity. For example, PUSCH repetition 1 and repetition 2 can be transmitted to TRP-1 and TRP-2 with beam 1 and beam 2, respectively. Current SRS resource indicator (SRI) field in DCI only indicates the SRS resource(s) for a single PUSCH transmission towards a TRP. For single-TRP PUSCH transmission in current specification, the UE's SRS index is indicated by the SRI in the DCI, and the correspondence between SRS index and the DL reference signal resource is indicated by MAC CE as shown in
On the other hand, the redesigned DCI to support multiple PUSCH beams should be backward compatible, e.g., it should also support the indication of a single PUSCH beam for single-TRP PUSCH transmission. In current specification, each TRP is configured with an SRS resource set. And within an SRS resource set, there are multiple SRS resource identified by SRI. To schedule the PUSCH repetitions towards two TRPs, 1) two SRI fields should be configured, each field corresponds to an SRS resource set, 2) two TPMIs should be configured for two PUSCH repetitions respectively.
In the current Rel-16 DCI format, the interpretation of SRI field depends on codebook (CB) and non-codebook (NCB) based transmission. CB based transmission only supports rank-1 transmission, e.g., only one SRS resource can be mapped to a PUSCH transmission. Nevertheless, NCB based transmission can support up to 4-layer transmission, e.g., a group of four SRS resources can be mapped to a PUSCH transmission. Meanwhile, the total number of SRS resource in an SRS resource set can be different, e.g., Nsrs=1,2,3,4 in Rel-16. Thus, there are multiple SRI indication tables in Rel-16 to map the SRI codepoint to the SRS resource, as shown in Tables 7.3.1.1.2-28 to 7.3.1.1.2-32B.
To enable dynamic switching among {TRP1, TRP2, (TRP1 and TRP2)}, two codepoints are enough, e.g., {01: TRP1, 10: TRP2, 11: (TRP1 and TRP2)}. Based on current SRI indication table, one additional codepoint can be used for each SRI field to enable dynamic switching between {TRP1, TRP2, (TRP1 and TRP2)}, for both CB and NCB based transmission. Since there are reserved states or codepoints in the current SRI indication table listed above, some embodiments may use the reserved state as the dynamic switching codepoint. In last RAN1104e meeting, it was agreed that the single-DCI based first SRI field design should follow current Rel-16 framework. Next, this disclosure proceeds by illustrating the single-DCI based second SRI field design for CB and NCB based transmission under different scenarios individually.
In one example, assume starting with a baseline scenario, which is CB based transmission with NSRS=3 SRS resources per SRS resource set. In this scenario, the 2nd SRI field has the same length with the 1st SRI field, which is 2 bits. Table 7.3.1.1.2-32A is used for both SRI fields. The ‘Reserved’ entry in the table is interpreted as a ‘Dynamic switching state’ which disables the PUSCH transmission towards the TRP corresponding to this SRS resource set, as shown below.
For NSRS=2, there is no reserved field in current SRI indication table 7.3.1.1.2-32. In some embodiments, there are two options as follows.
Option1: UE uses Table 7.3.1.1.2-32A (NSRS=3) but does not expect state 2 to be indicated.
Option2: Create a new Table 7.3.1.1.2-32′ as below.
For NSRS=1, there is no SRI indication table in current specification. In some embodiments, there are two options as follows.
More generally, for NSRS=1, if the SRI field index is 0, the corresponding SRI is configured, else if the SRI field index is not 0, the PUSCH transmission towards the corresponding TRP is disabled. For NSRS=2, if the SRI field index is 0 or 1, the corresponding SRI is configured, else if the SRI field index is not 0 or 1, the PUSCH transmission towards the corresponding TRP is disabled. For NSRS=3, if the SRI field index is 0, 1, or 2, the corresponding SRI is configured, else if the SRI field index is not 0 or 1 or 2, the PUSCH transmission towards the corresponding TRP is disabled.
For NSRS=4, there is no reserved field in current SRI indication table 7.3.1.1.2-32B. In some embodiments, there are two options as follows.
Next, the disclosure proceeds by describing the NCB-based SRI field design.
For {LMAX=2, 3, 4}, there are the following NCB-based SRI field design alternatives (Alt 1 and Alt 2).
Alt 1: Both the 1st and 2nd SRI fields are based on Rel-15/16 framework.
For {LMAX=1, NSRS=2/3/4}, the NCB-based SRI field design is similar to CB-based SRI field design, e.g.,
Alt 2: The 1st SRI field is based on Rel-15/16 framework. The 2nd SRI field is redesigned, which contains no ‘number of layer’ information but is used to indicate dynamic switching between {TRP1, TRP2, (TRP1 and TRP2)} with the last two codepoints (R1 and R2).
For {LMAX=1/2/3/4, NSRS=1}, the NCB-based SRI field design is only used for dynamic switching, e.g., two codepoints for each SRI fields respectively, indicating whether UE is enabled to transmit towards the corresponding TRP or not. This is the same with CB-based SRI field design Option 2 for NSRS=1.
Below is shown the modified NCB based SRI indication tables as follows, where the 1st SRI field is based on current Rel-15/16 framework and the 2nd SRI field is based on aforementioned Alt 2.
Next, this disclosure considers the single-DCI based precoding information and number of layer (PINL) field design. In current Rel-15/16 specification, the TPMI for PUSCH transmission is indicated in the PINL field and the mapping between PINL index the TPMI and number of layer is indicated by PINL Table 7.3.1.1.2-2 to 7.3.1.1.2-6. In the RAN1 meeting, it was agreed that the 1st TPMI field should use Rel-15/16 design. Here, some embodiments may utilize a new design for the 2nd TPMI field as described below.
For rank-1 PUSCH transmission, the 2nd PINL field use Rel-15/16 design, and current Table 7.3.1.1.2-3, Table 7.3.1.1.2-3A, Table 7.3.1.1.2-5, and Table 7.3.1.1.2-5A, where maxRank=1, are used for the 2nd PINL field.
For PUSCH transmission with maxRank lager than 1, some embodiments may use a redesigned 2nd PINL field such that the 2nd PINL field only contains the TPMI information but does not contain the number of layer information, e.g., the number of codepoints needed for the 2nd PINL field is the maximum number of TPMI among all layers. A detailed comparison between the number of states/bits needed for Rel-15/16 PINL field and the proposed 2nd PINL field design is listed as follows for all existing PINL table in current specification.
Systems and Implementations
The network 300 may include a UE 302, which may include any mobile or non-mobile computing device designed to communicate with a RAN 304 via an over-the-air connection. The UE 302 may be communicatively coupled with the RAN 304 by a Uu interface. The UE 302 may be, but is not limited to, a smartphone, tablet computer, wearable computer device, desktop computer, laptop computer, in-vehicle infotainment, in-car entertainment device, instrument cluster, head-up display device, onboard diagnostic device, dashtop mobile equipment, mobile data terminal, electronic engine management system, electronic/engine control unit, electronic/engine control module, embedded system, sensor, microcontroller, control module, engine management system, networked appliance, machine-type communication device, M2M or D2D device, IoT device, etc.
In some embodiments, the network 300 may include a plurality of UEs coupled directly with one another via a sidelink interface. The UEs may be M2M/D2D devices that communicate using physical sidelink channels such as, but not limited to, PSBCH, PSDCH, PSSCH, PSCCH, PSFCH, etc.
In some embodiments, the UE 302 may additionally communicate with an AP 306 via an over-the-air connection. The AP 306 may manage a WLAN connection, which may serve to offload some/all network traffic from the RAN 304. The connection between the UE 302 and the AP 306 may be consistent with any IEEE 802.11 protocol, wherein the AP 306 could be a wireless fidelity (Wi-Fi®) router. In some embodiments, the UE 302, RAN 304, and AP 306 may utilize cellular-WLAN aggregation (for example, LWA/LWIP). Cellular-WLAN aggregation may involve the UE 302 being configured by the RAN 304 to utilize both cellular radio resources and WLAN resources.
The RAN 304 may include one or more access nodes, for example, AN 308. AN 308 may terminate air-interface protocols for the UE 302 by providing access stratum protocols including RRC, PDCP, RLC, MAC, and L1 protocols. In this manner, the AN 308 may enable data/voice connectivity between CN 320 and the UE 302. In some embodiments, the AN 308 may be implemented in a discrete device or as one or more software entities running on server computers as part of, for example, a virtual network, which may be referred to as a CRAN or virtual baseband unit pool. The AN 308 be referred to as a BS, gNB, RAN node, eNB, ng-eNB, NodeB, RSU, TRxP, TRP, etc. The AN 308 may be a macrocell base station or a low power base station for providing femtocells, picocells or other like cells having smaller coverage areas, smaller user capacity, or higher bandwidth compared to macrocells.
In embodiments in which the RAN 304 includes a plurality of ANs, they may be coupled with one another via an X2 interface (if the RAN 304 is an LTE RAN) or an Xn interface (if the RAN 304 is a 5G RAN). The X2/Xn interfaces, which may be separated into control/user plane interfaces in some embodiments, may allow the ANs to communicate information related to handovers, data/context transfers, mobility, load management, interference coordination, etc.
The ANs of the RAN 304 may each manage one or more cells, cell groups, component carriers, etc. to provide the UE 302 with an air interface for network access. The UE 302 may be simultaneously connected with a plurality of cells provided by the same or different ANs of the RAN 304. For example, the UE 302 and RAN 304 may use carrier aggregation to allow the UE 302 to connect with a plurality of component carriers, each corresponding to a Pcell or Scell. In dual connectivity scenarios, a first AN may be a master node that provides an MCG and a second AN may be secondary node that provides an SCG. The first/second ANs may be any combination of eNB, gNB, ng-eNB, etc.
The RAN 304 may provide the air interface over a licensed spectrum or an unlicensed spectrum. To operate in the unlicensed spectrum, the nodes may use LAA, eLAA, and/or feLAA mechanisms based on CA technology with PCells/Scells. Prior to accessing the unlicensed spectrum, the nodes may perform medium/carrier-sensing operations based on, for example, a listen-before-talk (LBT) protocol.
In V2X scenarios the UE 302 or AN 308 may be or act as a RSU, which may refer to any transportation infrastructure entity used for V2X communications. An RSU may be implemented in or by a suitable AN or a stationary (or relatively stationary) UE. An RSU implemented in or by: a UE may be referred to as a “UE-type RSU”; an eNB may be referred to as an “eNB-type RSU”; a gNB may be referred to as a “gNB-type RSU”; and the like. In one example, an RSU is a computing device coupled with radio frequency circuitry located on a roadside that provides connectivity support to passing vehicle UEs. The RSU may also include internal data storage circuitry to store intersection map geometry, traffic statistics, media, as well as applications/software to sense and control ongoing vehicular and pedestrian traffic. The RSU may provide very low latency communications required for high speed events, such as crash avoidance, traffic warnings, and the like. Additionally or alternatively, the RSU may provide other cellular/WLAN communications services. The components of the RSU may be packaged in a weatherproof enclosure suitable for outdoor installation, and may include a network interface controller to provide a wired connection (e.g., Ethernet) to a traffic signal controller or a backhaul network.
In some embodiments, the RAN 304 may be an LTE RAN 310 with eNBs, for example, eNB 312. The LTE RAN 310 may provide an LTE air interface with the following characteristics: SCS of 15 kHz; CP-OFDM waveform for DL and SC-FDMA waveform for UL; turbo codes for data and TBCC for control; etc. The LTE air interface may rely on CSI-RS for CSI acquisition and beam management; PDSCH/PDCCH DMRS for PDSCH/PDCCH demodulation; and CRS for cell search and initial acquisition, channel quality measurements, and channel estimation for coherent demodulation/detection at the UE. The LTE air interface may operating on sub-6 GHz bands.
In some embodiments, the RAN 304 may be an NG-RAN 314 with gNBs, for example, gNB 316, or ng-eNBs, for example, ng-eNB 318. The gNB 316 may connect with 5G-enabled UEs using a 5G NR interface. The gNB 316 may connect with a 5G core through an NG interface, which may include an N2 interface or an N3 interface. The ng-eNB 318 may also connect with the 5G core through an NG interface, but may connect with a UE via an LTE air interface. The gNB 316 and the ng-eNB 318 may connect with each other over an Xn interface.
In some embodiments, the NG interface may be split into two parts, an NG user plane (NG-U) interface, which carries traffic data between the nodes of the NG-RAN 314 and a UPF 348 (e.g., N3 interface), and an NG control plane (NG-C) interface, which is a signaling interface between the nodes of the NG-RAN314 and an AMF 344 (e.g., N2 interface).
The NG-RAN 314 may provide a 5G-NR air interface with the following characteristics: variable SCS; CP-OFDM for DL, CP-OFDM and DFT-s-OFDM for UL; polar, repetition, simplex, and Reed-Muller codes for control and LDPC for data. The 5G-NR air interface may rely on CSI-RS, PDSCH/PDCCH DMRS similar to the LTE air interface. The 5G-NR air interface may not use a CRS, but may use PBCH DMRS for PBCH demodulation; PTRS for phase tracking for PDSCH; and tracking reference signal for time tracking. The 5G-NR air interface may operating on FR1 bands that include sub-6 GHz bands or FR2 bands that include bands from 24.25 GHz to 52.6 GHz. The 5G-NR air interface may include an SSB that is an area of a downlink resource grid that includes PSS/SSS/PBCH.
In some embodiments, the 5G-NR air interface may utilize BWPs for various purposes. For example, BWP can be used for dynamic adaptation of the SCS. For example, the UE 302 can be configured with multiple BWPs where each BWP configuration has a different SCS. When a BWP change is indicated to the UE 302, the SCS of the transmission is changed as well. Another use case example of BWP is related to power saving. In particular, multiple BWPs can be configured for the UE 302 with different amount of frequency resources (for example, PRBs) to support data transmission under different traffic loading scenarios. A BWP containing a smaller number of PRBs can be used for data transmission with small traffic load while allowing power saving at the UE 302 and in some cases at the gNB 316. A BWP containing a larger number of PRBs can be used for scenarios with higher traffic load.
The RAN 304 is communicatively coupled to CN 320 that includes network elements to provide various functions to support data and telecommunications services to customers/subscribers (for example, users of UE 302). The components of the CN 320 may be implemented in one physical node or separate physical nodes. In some embodiments, NFV may be utilized to virtualize any or all of the functions provided by the network elements of the CN 320 onto physical compute/storage resources in servers, switches, etc. A logical instantiation of the CN 320 may be referred to as a network slice, and a logical instantiation of a portion of the CN 320 may be referred to as a network sub-slice.
In some embodiments, the CN 320 may be an LTE CN 322, which may also be referred to as an EPC. The LTE CN 322 may include MME 324, SGW 326, SGSN 328, HSS 330, PGW 332, and PCRF 334 coupled with one another over interfaces (or “reference points”) as shown. Functions of the elements of the LTE CN 322 may be briefly introduced as follows.
The MME 324 may implement mobility management functions to track a current location of the UE 302 to facilitate paging, bearer activation/deactivation, handovers, gateway selection, authentication, etc.
The SGW 326 may terminate an Si interface toward the RAN and route data packets between the RAN and the LTE CN 322. The SGW 326 may be a local mobility anchor point for inter-RAN node handovers and also may provide an anchor for inter-3GPP mobility. Other responsibilities may include lawful intercept, charging, and some policy enforcement.
The SGSN 328 may track a location of the UE 302 and perform security functions and access control. In addition, the SGSN 328 may perform inter-EPC node signaling for mobility between different RAT networks; PDN and S-GW selection as specified by MME 324; MME selection for handovers; etc. The S3 reference point between the MME 324 and the SGSN 328 may enable user and bearer information exchange for inter-3GPP access network mobility in idle/active states.
The HSS 330 may include a database for network users, including subscription-related information to support the network entities' handling of communication sessions. The HSS 330 can provide support for routing/roaming, authentication, authorization, naming/addressing resolution, location dependencies, etc. An S6a reference point between the HSS 330 and the MME 324 may enable transfer of subscription and authentication data for authenticating/authorizing user access to the LTE CN 320.
The PGW 332 may terminate an SGi interface toward a data network (DN) 336 that may include an application/content server 338. The PGW 332 may route data packets between the LTE CN 322 and the data network 336. The PGW 332 may be coupled with the SGW 326 by an S5 reference point to facilitate user plane tunneling and tunnel management. The PGW 332 may further include a node for policy enforcement and charging data collection (for example, PCEF). Additionally, the SGi reference point between the PGW 332 and the data network 336 may be an operator external public, a private PDN, or an intra-operator packet data network, for example, for provision of IMS services. The PGW 332 may be coupled with a PCRF 334 via a Gx reference point.
The PCRF 334 is the policy and charging control element of the LTE CN 322. The PCRF 334 may be communicatively coupled to the app/content server 338 to determine appropriate QoS and charging parameters for service flows. The PCRF 332 may provision associated rules into a PCEF (via Gx reference point) with appropriate TFT and QCI.
In some embodiments, the CN 320 may be a 5GC 340. The 5GC 340 may include an AUSF 342, AMF 344, SMF 346, UPF 348, NSSF 350, NEF 352, NRF 354, PCF 356, UDM 358, and AF 360 coupled with one another over interfaces (or “reference points”) as shown. Functions of the elements of the 5GC 340 may be briefly introduced as follows.
The AUSF 342 may store data for authentication of UE 302 and handle authentication-related functionality. The AUSF 342 may facilitate a common authentication framework for various access types. In addition to communicating with other elements of the 5GC 340 over reference points as shown, the AUSF 342 may exhibit an Nausf service-based interface.
The AMF 344 may allow other functions of the 5GC 340 to communicate with the UE 302 and the RAN 304 and to subscribe to notifications about mobility events with respect to the UE 302. The AMF 344 may be responsible for registration management (for example, for registering UE 302), connection management, reachability management, mobility management, lawful interception of AMF-related events, and access authentication and authorization. The AMF 344 may provide transport for SM messages between the UE 302 and the SMF 346, and act as a transparent proxy for routing SM messages. AMF 344 may also provide transport for SMS messages between UE 302 and an SMSF. AMF 344 may interact with the AUSF 342 and the UE 302 to perform various security anchor and context management functions. Furthermore, AMF 344 may be a termination point of a RAN CP interface, which may include or be an N2 reference point between the RAN 304 and the AMF 344; and the AMF 344 may be a termination point of NAS (N1) signaling, and perform NAS ciphering and integrity protection. AMF 344 may also support NAS signaling with the UE 302 over an N3 IWF interface.
The SMF 346 may be responsible for SM (for example, session establishment, tunnel management between UPF 348 and AN 308); UE IP address allocation and management (including optional authorization); selection and control of UP function; configuring traffic steering at UPF 348 to route traffic to proper destination; termination of interfaces toward policy control functions; controlling part of policy enforcement, charging, and QoS; lawful intercept (for SM events and interface to LI system); termination of SM parts of NAS messages; downlink data notification; initiating AN specific SM information, sent via AMF 344 over N2 to AN 308; and determining SSC mode of a session. SM may refer to management of a PDU session, and a PDU session or “session” may refer to a PDU connectivity service that provides or enables the exchange of PDUs between the UE 302 and the data network 336.
The UPF 348 may act as an anchor point for intra-RAT and inter-RAT mobility, an external PDU session point of interconnect to data network 336, and a branching point to support multi-homed PDU session. The UPF 348 may also perform packet routing and forwarding, perform packet inspection, enforce the user plane part of policy rules, lawfully intercept packets (UP collection), perform traffic usage reporting, perform QoS handling for a user plane (e.g., packet filtering, gating, UL/DL rate enforcement), perform uplink traffic verification (e.g., SDF-to-QoS flow mapping), transport level packet marking in the uplink and downlink, and perform downlink packet buffering and downlink data notification triggering. UPF 348 may include an uplink classifier to support routing traffic flows to a data network.
The NSSF 350 may select a set of network slice instances serving the UE 302. The NSSF 350 may also determine allowed NSSAI and the mapping to the subscribed S-NSSAIs, if needed. The NSSF 350 may also determine the AMF set to be used to serve the UE 302, or a list of candidate AMFs based on a suitable configuration and possibly by querying the NRF 354. The selection of a set of network slice instances for the UE 302 may be triggered by the AMF 344 with which the UE 302 is registered by interacting with the NSSF 350, which may lead to a change of AMF. The NSSF 350 may interact with the AMF 344 via an N22 reference point; and may communicate with another NS SF in a visited network via an N31 reference point (not shown). Additionally, the NS SF 350 may exhibit an Nnssf service-based interface.
The NEF 352 may securely expose services and capabilities provided by 3GPP network functions for third party, internal exposure/re-exposure, AFs (e.g., AF 360), edge computing or fog computing systems, etc. In such embodiments, the NEF 352 may authenticate, authorize, or throttle the AFs. NEF 352 may also translate information exchanged with the AF 360 and information exchanged with internal network functions. For example, the NEF 352 may translate between an AF-Service-Identifier and an internal 5GC information. NEF 352 may also receive information from other NFs based on exposed capabilities of other NFs. This information may be stored at the NEF 352 as structured data, or at a data storage NF using standardized interfaces. The stored information can then be re-exposed by the NEF 352 to other NFs and AFs, or used for other purposes such as analytics. Additionally, the NEF 352 may exhibit an Nnef service-based interface.
The NRF 354 may support service discovery functions, receive NF discovery requests from NF instances, and provide the information of the discovered NF instances to the NF instances. NRF 354 also maintains information of available NF instances and their supported services. As used herein, the terms “instantiate,” “instantiation,” and the like may refer to the creation of an instance, and an “instance” may refer to a concrete occurrence of an object, which may occur, for example, during execution of program code. Additionally, the NRF 354 may exhibit the Nnrf service-based interface.
The PCF 356 may provide policy rules to control plane functions to enforce them, and may also support unified policy framework to govern network behavior. The PCF 356 may also implement a front end to access subscription information relevant for policy decisions in a UDR of the UDM 358. In addition to communicating with functions over reference points as shown, the PCF 356 exhibit an Npcf service-based interface.
The UDM 358 may handle subscription-related information to support the network entities' handling of communication sessions, and may store subscription data of UE 302. For example, subscription data may be communicated via an N8 reference point between the UDM 358 and the AMF 344. The UDM 358 may include two parts, an application front end and a UDR. The UDR may store subscription data and policy data for the UDM 358 and the PCF 356, and/or structured data for exposure and application data (including PFDs for application detection, application request information for multiple UEs 302) for the NEF 352. The Nudr service-based interface may be exhibited by the UDR 221 to allow the UDM 358, PCF 356, and NEF 352 to access a particular set of the stored data, as well as to read, update (e.g., add, modify), delete, and subscribe to notification of relevant data changes in the UDR. The UDM may include a UDM-FE, which is in charge of processing credentials, location management, subscription management and so on. Several different front ends may serve the same user in different transactions. The UDM-FE accesses subscription information stored in the UDR and performs authentication credential processing, user identification handling, access authorization, registration/mobility management, and subscription management. In addition to communicating with other NFs over reference points as shown, the UDM 358 may exhibit the Nudm service-based interface.
The AF 360 may provide application influence on traffic routing, provide access to NEF, and interact with the policy framework for policy control.
In some embodiments, the 5GC 340 may enable edge computing by selecting operator/3′ d party services to be geographically close to a point that the UE 302 is attached to the network. This may reduce latency and load on the network. To provide edge-computing implementations, the 5GC 340 may select a UPF 348 close to the UE 302 and execute traffic steering from the UPF 348 to data network 336 via the N6 interface. This may be based on the UE subscription data, UE location, and information provided by the AF 360. In this way, the AF 360 may influence UPF (re)selection and traffic routing. Based on operator deployment, when AF 360 is considered to be a trusted entity, the network operator may permit AF 360 to interact directly with relevant NFs. Additionally, the AF 360 may exhibit an Naf service-based interface.
The data network 336 may represent various network operator services, Internet access, or third party services that may be provided by one or more servers including, for example, application/content server 338.
The UE 402 may be communicatively coupled with the AN 404 via connection 406. The connection 406 is illustrated as an air interface to enable communicative coupling, and can be consistent with cellular communications protocols such as an LTE protocol or a 5G NR protocol operating at mmWave or sub-6 GHz frequencies.
The UE 402 may include a host platform 408 coupled with a modem platform 410. The host platform 408 may include application processing circuitry 412, which may be coupled with protocol processing circuitry 414 of the modem platform 410. The application processing circuitry 412 may run various applications for the UE 402 that source/sink application data. The application processing circuitry 412 may further implement one or more layer operations to transmit/receive application data to/from a data network. These layer operations may include transport (for example UDP) and Internet (for example, IP) operations
The protocol processing circuitry 414 may implement one or more of layer operations to facilitate transmission or reception of data over the connection 406. The layer operations implemented by the protocol processing circuitry 414 may include, for example, MAC, RLC, PDCP, RRC and NAS operations.
The modem platform 410 may further include digital baseband circuitry 416 that may implement one or more layer operations that are “below” layer operations performed by the protocol processing circuitry 414 in a network protocol stack. These operations may include, for example, PHY operations including one or more of HARQ-ACK functions, scrambling/descrambling, encoding/decoding, layer mapping/de-mapping, modulation symbol mapping, received symbol/bit metric determination, multi-antenna port precoding/decoding, which may include one or more of space-time, space-frequency or spatial coding, reference signal generation/detection, preamble sequence generation and/or decoding, synchronization sequence generation/detection, control channel signal blind decoding, and other related functions.
The modem platform 410 may further include transmit circuitry 418, receive circuitry 420, RF circuitry 422, and RF front end (RFFE) 424, which may include or connect to one or more antenna panels 426. Briefly, the transmit circuitry 418 may include a digital-to-analog converter, mixer, intermediate frequency (IF) components, etc.; the receive circuitry 420 may include an analog-to-digital converter, mixer, IF components, etc.; the RF circuitry 422 may include a low-noise amplifier, a power amplifier, power tracking components, etc.; RFFE 424 may include filters (for example, surface/bulk acoustic wave filters), switches, antenna tuners, beamforming components (for example, phase-array antenna components), etc. The selection and arrangement of the components of the transmit circuitry 418, receive circuitry 420, RF circuitry 422, RFFE 424, and antenna panels 426 (referred generically as “transmit/receive components”) may be specific to details of a specific implementation such as, for example, whether communication is TDM or FDM, in mmWave or sub-6 gHz frequencies, etc. In some embodiments, the transmit/receive components may be arranged in multiple parallel transmit/receive chains, may be disposed in the same or different chips/modules, etc.
In some embodiments, the protocol processing circuitry 414 may include one or more instances of control circuitry (not shown) to provide control functions for the transmit/receive components.
A UE reception may be established by and via the antenna panels 426, RFFE 424, RF circuitry 422, receive circuitry 420, digital baseband circuitry 416, and protocol processing circuitry 414. In some embodiments, the antenna panels 426 may receive a transmission from the AN 404 by receive-beamforming signals received by a plurality of antennas/antenna elements of the one or more antenna panels 426.
A UE transmission may be established by and via the protocol processing circuitry 414, digital baseband circuitry 416, transmit circuitry 418, RF circuitry 422, RFFE 424, and antenna panels 426. In some embodiments, the transmit components of the UE 404 may apply a spatial filter to the data to be transmitted to form a transmit beam emitted by the antenna elements of the antenna panels 426.
Similar to the UE 402, the AN 404 may include a host platform 428 coupled with a modem platform 430. The host platform 428 may include application processing circuitry 432 coupled with protocol processing circuitry 434 of the modem platform 430. The modem platform may further include digital baseband circuitry 436, transmit circuitry 438, receive circuitry 440, RF circuitry 442, RFFE circuitry 444, and antenna panels 446. The components of the AN 404 may be similar to and substantially interchangeable with like-named components of the UE 402. In addition to performing data transmission/reception as described above, the components of the AN 408 may perform various logical functions that include, for example, RNC functions such as radio bearer management, uplink and downlink dynamic radio resource management, and data packet scheduling.
The processors 510 may include, for example, a processor 512 and a processor 514. The processors 510 may be, for example, a central processing unit (CPU), a reduced instruction set computing (RISC) processor, a complex instruction set computing (CISC) processor, a graphics processing unit (GPU), a DSP such as a baseband processor, an ASIC, an FPGA, a radio-frequency integrated circuit (RFIC), another processor (including those discussed herein), or any suitable combination thereof.
The memory/storage devices 520 may include main memory, disk storage, or any suitable combination thereof. The memory/storage devices 520 may include, but are not limited to, any type of volatile, non-volatile, or semi-volatile memory such as dynamic random access memory (DRAM), static random access memory (SRAM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), Flash memory, solid-state storage, etc.
The communication resources 530 may include interconnection or network interface controllers, components, or other suitable devices to communicate with one or more peripheral devices 504 or one or more databases 506 or other network elements via a network 508. For example, the communication resources 530 may include wired communication components (e.g., for coupling via USB, Ethernet, etc.), cellular communication components, NFC components, Bluetooth® (or Bluetooth® Low Energy) components, Wi-Fi® components, and other communication components.
Instructions 550 may comprise software, a program, an application, an applet, an app, or other executable code for causing at least any of the processors 510 to perform any one or more of the methodologies discussed herein. The instructions 550 may reside, completely or partially, within at least one of the processors 510 (e.g., within the processor's cache memory), the memory/storage devices 520, or any suitable combination thereof. Furthermore, any portion of the instructions 550 may be transferred to the hardware resources 500 from any combination of the peripheral devices 504 or the databases 506. Accordingly, the memory of processors 510, the memory/storage devices 520, the peripheral devices 504, and the databases 506 are examples of computer-readable and machine-readable media.
Example Procedures
In some embodiments, the electronic device(s), network(s), system(s), chip(s) or component(s), or portions or implementations thereof, of
Another such process is illustrated in
Another such process is illustrated in
For one or more embodiments, at least one of the components set forth in one or more of the preceding figures may be configured to perform one or more operations, techniques, processes, and/or methods as set forth in the example section below. For example, the baseband circuitry as described above in connection with one or more of the preceding figures may be configured to operate in accordance with one or more of the examples set forth below. For another example, circuitry associated with a UE, base station, network element, etc. as described above in connection with one or more of the preceding figures may be configured to operate in accordance with one or more of the examples set forth below in the example section.
Example 1 may include a method of single-DCI based SRI and PINL field design for multi-TRP PUSCH repetition, wherein the method includes:
Example 2 may include the method of example 1 or some other example herein, wherein the 1-TRP/2-TRP dynamic switching is indicated by the redesigned SRI field in DCI using the reserved state in CB/NCB based SRI indication table.
Example 3 may include the method of example 1 or some other example herein, wherein the 1-TRP/2-TRP dynamic switching is indicated by the redesigned SRI field in DCI using new CB/NCB based SRI indication table.
Example 4 may include the method of example 1 or some other example herein, wherein CB based scheme, SRI table for NSRS=3 can be used/re-interpreted for the 2nd SRI field design for the configurations of NSRS=2 and NSRS=1.
Example 5 may include the method of example 1 or some other example herein, wherein NCB based scheme, the 2nd SRI field is redesigned, which contains no ‘number of layer’ information but is used to indicate dynamic switching between {TRP1, TRP2, (TRP1 and TRP2)} with the last two codepoints (R1 and R2).
Example 6 may include the method of claim 1, the re-ordering TRP1/TPR2 is indicated by the redesigned SRI field in DCI for CB based scheme where NSRS=4.
Example 7 may include the method of example 1 or some other example herein, wherein CB based scheme, the 2nd PINL field is redesigned such that it only contains the TPMI information but does not contain the number of layer information.
Example X1 includes an apparatus comprising:
Example X2 includes the apparatus of example X1 or some other example herein, wherein the PINL field is to indicate twenty-eight TPMI states using a five-bit field.
Example X3 includes the apparatus of example X1 or some other example herein, wherein the PINL field is to indicate fourteen TPMI states using a four-bit field.
Example X4 includes the apparatus of example X1 or some other example herein, wherein the PINL field is to indicate six TPMI states using a three-bit field.
Example X5 includes the apparatus of example X1 or some other example herein, wherein the PINL field is to indicate sixteen TPMI states using a four-bit field.
Example X6 includes the apparatus of example X1 or some other example herein, wherein the PINL field is to indicate two TPMI states using a one-bit field.
Example X7 includes the apparatus of example X1 or some other example herein, wherein the PINL field is to indicate three TPMI states using a two-bit field.
Example X8 includes the apparatus of any of examples X1-X7, wherein the PUSCH transmission has a maximum rank (maxRank) larger than one.
Example X9 includes one or more computer-readable media storing instructions that, when executed by one or more processors, cause a next-generation NodeB (gNB) to:
Example X10 includes the one or more computer-readable media of example X9 or some other example herein, wherein the PINL field is to indicate twenty-eight TPMI states using a five-bit field.
Example X11 includes the one or more computer-readable media of example X9 or some other example herein, wherein the PINL field is to indicate fourteen TPMI states using a four-bit field.
Example X12 includes the one or more computer-readable media of example X9 or some other example herein, wherein the PINL field is to indicate six TPMI states using a three-bit field.
Example X13 includes the one or more computer-readable media of example X9 or some other example herein, wherein the PINL field is to indicate sixteen TPMI states using a four-bit field.
Example X14 includes the one or more computer-readable media of example X9 or some other example herein, wherein the PINL field is to indicate two TPMI states using a one-bit field.
Example X15 includes the one or more computer-readable media of example X9 or some other example herein, wherein the PINL field is to indicate three TPMI states using a two-bit field.
Example X16 includes the one or more computer-readable media of any of examples X9-X15, wherein the PUSCH transmission has a maximum rank (maxRank) larger than one.
Example X17 includes one or more computer-readable media storing instructions that, when executed by one or more processors, cause a user equipment (UE) to:
Example X18 includes the one or more computer-readable media of example X17 or some other example herein, wherein the PINL field is to indicate twenty-eight TPMI states using a five-bit field.
Example X19 includes the one or more computer-readable media of example X17 or some other example herein, wherein the PINL field is to indicate fourteen TPMI states using a four-bit field.
Example X20 includes the one or more computer-readable media of example X17 or some other example herein, wherein the PINL field is to indicate six TPMI states using a three-bit field.
Example X21 includes the one or more computer-readable media of example X17 or some other example herein, wherein the PINL field is to indicate sixteen TPMI states using a four-bit field.
Example X22 includes the one or more computer-readable media of example X17 or some other example herein, wherein the PINL field is to indicate two TPMI states using a one-bit field.
Example X23 includes the one or more computer-readable media of example X17 or some other example herein, wherein the PINL field is to indicate three TPMI states using a two-bit field.
Example X24 includes the one or more computer-readable media of any of examples X17-X24, wherein the PUSCH transmission has a maximum rank (maxRank) larger than one.
Example Z01 may include an apparatus comprising means to perform one or more elements of a method described in or related to any of examples 1-X24, or any other method or process described herein.
Example Z02 may include one or more non-transitory computer-readable media comprising instructions to cause an electronic device, upon execution of the instructions by one or more processors of the electronic device, to perform one or more elements of a method described in or related to any of examples 1-X24, or any other method or process described herein.
Example Z03 may include an apparatus comprising logic, modules, or circuitry to perform one or more elements of a method described in or related to any of examples 1-X24, or any other method or process described herein.
Example Z04 may include a method, technique, or process as described in or related to any of examples 1-X24, or portions or parts thereof.
Example Z05 may include an apparatus comprising: one or more processors and one or more computer-readable media comprising instructions that, when executed by the one or more processors, cause the one or more processors to perform the method, techniques, or process as described in or related to any of examples 1-X24, or portions thereof.
Example Z06 may include a signal as described in or related to any of examples 1-X24, or portions or parts thereof.
Example Z07 may include a datagram, packet, frame, segment, protocol data unit (PDU), or message as described in or related to any of examples 1-X24, or portions or parts thereof, or otherwise described in the present disclosure.
Example Z08 may include a signal encoded with data as described in or related to any of examples 1-X24, or portions or parts thereof, or otherwise described in the present disclosure.
Example Z09 may include a signal encoded with a datagram, packet, frame, segment, protocol data unit (PDU), or message as described in or related to any of examples 1-X24, or portions or parts thereof, or otherwise described in the present disclosure.
Example Z10 may include an electromagnetic signal carrying computer-readable instructions, wherein execution of the computer-readable instructions by one or more processors is to cause the one or more processors to perform the method, techniques, or process as described in or related to any of examples 1-X24, or portions thereof.
Example Z11 may include a computer program comprising instructions, wherein execution of the program by a processing element is to cause the processing element to carry out the method, techniques, or process as described in or related to any of examples 1-X24, or portions thereof.
Example Z12 may include a signal in a wireless network as shown and described herein.
Example Z13 may include a method of communicating in a wireless network as shown and described herein.
Example Z14 may include a system for providing wireless communication as shown and described herein.
Example Z15 may include a device for providing wireless communication as shown and described herein.
Any of the above-described examples may be combined with any other example (or combination of examples), unless explicitly stated otherwise. The foregoing description of one or more implementations provides illustration and description, but is not intended to be exhaustive or to limit the scope of embodiments to the precise form disclosed. Modifications and variations are possible in light of the above teachings or may be acquired from practice of various embodiments.
Unless used differently herein, terms, definitions, and abbreviations may be consistent with terms, definitions, and abbreviations defined in 3GPP TR 21.905 v16.0.0 (2019-06). For the purposes of the present document, the following abbreviations may apply to the examples and embodiments discussed herein.
For the purposes of the present document, the following terms and definitions are applicable to the examples and embodiments discussed herein.
The term “circuitry” as used herein refers to, is part of, or includes hardware components such as an electronic circuit, a logic circuit, a processor (shared, dedicated, or group) and/or memory (shared, dedicated, or group), an Application Specific Integrated Circuit (ASIC), a field-programmable device (FPD) (e.g., a field-programmable gate array (FPGA), a programmable logic device (PLD), a complex PLD (CPLD), a high-capacity PLD (HCPLD), a structured ASIC, or a programmable SoC), digital signal processors (DSPs), etc., that are configured to provide the described functionality. In some embodiments, the circuitry may execute one or more software or firmware programs to provide at least some of the described functionality. The term “circuitry” may also refer to a combination of one or more hardware elements (or a combination of circuits used in an electrical or electronic system) with the program code used to carry out the functionality of that program code. In these embodiments, the combination of hardware elements and program code may be referred to as a particular type of circuitry.
The term “processor circuitry” as used herein refers to, is part of, or includes circuitry capable of sequentially and automatically carrying out a sequence of arithmetic or logical operations, or recording, storing, and/or transferring digital data. Processing circuitry may include one or more processing cores to execute instructions and one or more memory structures to store program and data information. The term “processor circuitry” may refer to one or more application processors, one or more baseband processors, a physical central processing unit (CPU), a single-core processor, a dual-core processor, a triple-core processor, a quad-core processor, and/or any other device capable of executing or otherwise operating computer-executable instructions, such as program code, software modules, and/or functional processes. Processing circuitry may include more hardware accelerators, which may be microprocessors, programmable processing devices, or the like. The one or more hardware accelerators may include, for example, computer vision (CV) and/or deep learning (DL) accelerators. The terms “application circuitry” and/or “baseband circuitry” may be considered synonymous to, and may be referred to as, “processor circuitry.”
The term “interface circuitry” as used herein refers to, is part of, or includes circuitry that enables the exchange of information between two or more components or devices. The term “interface circuitry” may refer to one or more hardware interfaces, for example, buses, I/O interfaces, peripheral component interfaces, network interface cards, and/or the like.
The term “user equipment” or “UE” as used herein refers to a device with radio communication capabilities and may describe a remote user of network resources in a communications network. The term “user equipment” or “UE” may be considered synonymous to, and may be referred to as, client, mobile, mobile device, mobile terminal, user terminal, mobile unit, mobile station, mobile user, subscriber, user, remote station, access agent, user agent, receiver, radio equipment, reconfigurable radio equipment, reconfigurable mobile device, etc. Furthermore, the term “user equipment” or “UE” may include any type of wireless/wired device or any computing device including a wireless communications interface.
The term “network element” as used herein refers to physical or virtualized equipment and/or infrastructure used to provide wired or wireless communication network services. The term “network element” may be considered synonymous to and/or referred to as a networked computer, networking hardware, network equipment, network node, router, switch, hub, bridge, radio network controller, RAN device, RAN node, gateway, server, virtualized VNF, NFVI, and/or the like.
The term “computer system” as used herein refers to any type interconnected electronic devices, computer devices, or components thereof. Additionally, the term “computer system” and/or “system” may refer to various components of a computer that are communicatively coupled with one another. Furthermore, the term “computer system” and/or “system” may refer to multiple computer devices and/or multiple computing systems that are communicatively coupled with one another and configured to share computing and/or networking resources.
The term “appliance,” “computer appliance,” or the like, as used herein refers to a computer device or computer system with program code (e.g., software or firmware) that is specifically designed to provide a specific computing resource. A “virtual appliance” is a virtual machine image to be implemented by a hypervisor-equipped device that virtualizes or emulates a computer appliance or otherwise is dedicated to provide a specific computing resource.
The term “resource” as used herein refers to a physical or virtual device, a physical or virtual component within a computing environment, and/or a physical or virtual component within a particular device, such as computer devices, mechanical devices, memory space, processor/CPU time, processor/CPU usage, processor and accelerator loads, hardware time or usage, electrical power, input/output operations, ports or network sockets, channel/link allocation, throughput, memory usage, storage, network, database and applications, workload units, and/or the like. A “hardware resource” may refer to compute, storage, and/or network resources provided by physical hardware element(s). A “virtualized resource” may refer to compute, storage, and/or network resources provided by virtualization infrastructure to an application, device, system, etc. The term “network resource” or “communication resource” may refer to resources that are accessible by computer devices/systems via a communications network. The term “system resources” may refer to any kind of shared entities to provide services, and may include computing and/or network resources. System resources may be considered as a set of coherent functions, network data objects or services, accessible through a server where such system resources reside on a single host or multiple hosts and are clearly identifiable.
The term “channel” as used herein refers to any transmission medium, either tangible or intangible, which is used to communicate data or a data stream. The term “channel” may be synonymous with and/or equivalent to “communications channel,” “data communications channel,” “transmission channel,” “data transmission channel,” “access channel,” “data access channel,” “link,” “data link,” “carrier,” “radiofrequency carrier,” and/or any other like term denoting a pathway or medium through which data is communicated. Additionally, the term “link” as used herein refers to a connection between two devices through a RAT for the purpose of transmitting and receiving information.
The terms “instantiate,” “instantiation,” and the like as used herein refers to the creation of an instance. An “instance” also refers to a concrete occurrence of an object, which may occur, for example, during execution of program code.
The terms “coupled,” “communicatively coupled,” along with derivatives thereof are used herein. The term “coupled” may mean two or more elements are in direct physical or electrical contact with one another, may mean that two or more elements indirectly contact each other but still cooperate or interact with each other, and/or may mean that one or more other elements are coupled or connected between the elements that are said to be coupled with each other. The term “directly coupled” may mean that two or more elements are in direct contact with one another. The term “communicatively coupled” may mean that two or more elements may be in contact with one another by a means of communication including through a wire or other interconnect connection, through a wireless communication channel or link, and/or the like.
The term “information element” refers to a structural element containing one or more fields. The term “field” refers to individual contents of an information element, or a data element that contains content.
The term “SMTC” refers to an SSB-based measurement timing configuration configured by SSB-MeasurementTimingConfiguration.
The term “SSB” refers to an SS/PBCH block.
The term “a “Primary Cell” refers to the MCG cell, operating on the primary frequency, in which the UE either performs the initial connection establishment procedure or initiates the connection re-establishment procedure.
The term “Primary SCG Cell” refers to the SCG cell in which the UE performs random access when performing the Reconfiguration with Sync procedure for DC operation.
The term “Secondary Cell” refers to a cell providing additional radio resources on top of a Special Cell for a UE configured with CA.
The term “Secondary Cell Group” refers to the subset of serving cells comprising the PSCell and zero or more secondary cells for a UE configured with DC.
The term “Serving Cell” refers to the primary cell for a UE in RRC CONNECTED not configured with CA/DC there is only one serving cell comprising of the primary cell.
The term “serving cell” or “serving cells” refers to the set of cells comprising the Special Cell(s) and all secondary cells for a UE in RRC_CONNECTED configured with CA/.
The term “Special Cell” refers to the PCell of the MCG or the PSCell of the SCG for DC operation; otherwise, the term “Special Cell” refers to the Pcell.
The present application claims priority to U.S. Provisional Patent Application No. 63/165,737, which was filed Mar. 24, 2021.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/US2022/021572 | 3/23/2022 | WO |
| Number | Date | Country | |
|---|---|---|---|
| 63165737 | Mar 2021 | US |
