Delaying UE Radio Capability ID (URCID) updates for EPLMN

Abstract

Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for optimizing procedures for updating a UE's radio capability ID (URCID) when the UE moves to a new public land mobile network (PLMN) within a registration area. These techniques can help avoid unnecessary signaling traffic and reduce UE power consumption. An example method performed by a user equipment (UE) generally includes receiving at least one URCID assigned by a first PLMN; and taking one or more actions to delay or avoid updating the URCID when moving to a second PLMN in the same registration area as the first PLMN.

Description

[0001] background

[0002] Priority claim

[0003] This application claims priority to U.S. Application No. 17 / 322,186, filed on May 17, 2021, which claims the benefit of and priority to U.S. Provisional Application No. 63 / 026,635, filed on May 18, 2020, both of which are expressly incorporated herein by reference in their entirety as if fully set forth below and for all applicable purposes.

[0004] public domain

[0005] Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for updating a UE Radio Capability ID (URCID) as the UE moves within a registration area.

[0006] Related technical description

[0007] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcasts, etc. These wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple-access systems include 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SC-FDMA) systems, and Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, to name a few.

[0008] In some examples, a wireless multiple-access communication system may include several base stations (BSs), each of which is capable of simultaneously supporting communication for multiple communication devices (also referred to as user equipment (UE)). In an LTE or LTE-A network, a set of one or more base stations may define an evolved Node B (eNB). In other examples (e.g., in next-generation, new radio (NR), or 5G networks), a wireless multiple-access communication system may include several distributed units (DUs) (e.g., edge units (EUs), edge nodes (ENs), radio heads (RHs), smart radio heads (SRHs), transmit / receive points (TRPs), etc.) in communication with several central units (CUs) (e.g., central nodes (CNs), access node controllers (ANCs), etc.), wherein a set of one or more DUs in communication with a CU may define an access node (e.g., which may be referred to as a BS, 5G NB, next-generation Node B (gNB or gNodeB), transmit / receive point (TRP), etc.). A BS or DU may communicate with a set of UEs on downlink channels (eg, for transmissions from the BS or DU to the UEs) and uplink channels (eg, for transmissions from the UEs to the BS or DU).

[0009] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a city, country, region, and even global level. NR (e.g., New Radio or 5G) is an example of an emerging telecommunication standard. NR is an enhancement to the LTE mobile standard promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by using OFDMA with a cyclic prefix (CP) on the downlink (DL) and uplink (UL) to improve spectrum efficiency, reduce costs, improve services, utilize new spectrum, and better integrate with other open standards. To this end, NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.

[0010] However, as the demand for mobile broadband access continues to grow, there is a need for further improvements to NR and LTE technologies. Preferably, these improvements should also apply to other multiple access technologies and the telecommunication standards that employ them.

[0011] Overview

[0012] The systems, methods, and devices of the present disclosure each have several aspects, no single one of which is solely responsible for its desirable attributes. Without limiting the scope of the disclosure as expressed in the appended claims, some features will now be briefly discussed. After considering this discussion, and particularly after reading the section entitled "Detailed Description," one will understand how the features of the present disclosure provide advantages, including improved communications in an integrated access and backhaul system.

[0013] Certain aspects provide a method for wireless communications by a user equipment (UE). The method generally includes receiving at least one UE radio capability identifier (URCID) assigned by a first public land mobile network (PLMN) and taking one or more actions to delay or avoid updating the URCID when moving to a second PLMN in the same registration area as the first PLMN.

[0014] Certain aspects of the present disclosure relate to an apparatus for wireless communication by a UE. The apparatus generally includes a memory and at least one processor coupled to the memory, the memory and the at least one processor being configured to receive at least one URCID assigned by a first PLMN and take one or more actions to delay or avoid updating the URCID when moving to a second PLMN in the same registration area as the first PLMN.

[0015] Certain aspects of the present disclosure relate to an apparatus for wireless communication by a UE. The apparatus generally includes means for receiving at least one URCID assigned by a first PLMN and means for taking one or more actions to delay or avoid updating the URCID when moving to a second PLMN in the same registration area as the first PLMN.

[0016] Certain aspects of the present disclosure relate to a computer-readable medium having stored thereon instructions for receiving at least one URCID assigned by a first PLMN and taking one or more actions to delay or avoid updating the URCID when moving to a second PLMN in the same registration area as the first PLMN.

[0017] To accomplish the foregoing and related ends, one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and accompanying drawings set forth in detail certain illustrative features of the one or more aspects. However, these features are indicative of but a few of the various ways in which the principles of the various aspects may be employed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order that the manner in which the above-recited features of the present disclosure may be understood in detail, a more particular description of the content briefly summarized above may be obtained by reference to various aspects, some of which are illustrated in the accompanying drawings. It should be noted, however, that the accompanying drawings illustrate only certain typical aspects of the disclosure and are therefore not to be considered limiting of its scope, as the description may admit to other equally effective aspects.

[0020] Figure 1 is a block diagram conceptually illustrating an example wireless system in accordance with certain aspects of the present disclosure.

[0021] Figure 2is a block diagram conceptually illustrating designs of example base stations (BSs) and user equipment (UEs) in accordance with certain aspects of the present disclosure.

[0022] Figure 3 is a block diagram illustrating an example architecture of a core network (CN) and a radio access network (RAN) in accordance with certain aspects of the present disclosure.

[0023] Figure 4 is a block diagram illustrating an example communication protocol stack in a RAN, in accordance with certain aspects of the present disclosure.

[0024] Figure 5 is a block diagram illustrating an example of a frame format for New Radio (NR) in accordance with certain aspects of the present disclosure.

[0025] Figure 6 is a call flow diagram illustrating pre-decoding samples of relay packets in accordance with certain aspects of the present disclosure.

[0026] Figure 7 Illustrated are example operations for wireless communications by a user equipment (UE), in accordance with certain aspects of the present disclosure.

[0027] Figure 8 is a call flow diagram illustrating pre-decoding samples of relay packets in accordance with certain aspects of the present disclosure.

[0028] Figure 9 is an example apparatus having components capable of performing operations according to certain aspects of the present disclosure.

[0029] To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the figures. It is contemplated that elements disclosed in one aspect may be beneficially utilized in other aspects without specific recitation.

[0030] Detailed description

[0031] Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for updating a user equipment (UE) radio capability ID (URCID) as the UE moves within a registration area. These techniques can help avoid unnecessary signaling traffic and reduce UE power consumption.

[0032] The following description provides examples and does not limit the scope, applicability, or examples set forth in the claims. Changes may be made to the functions and arrangements of the elements discussed without departing from the scope of this disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Moreover, features described with reference to some examples may be combined in some other examples. For example, a device or method may be implemented using any number of the aspects set forth herein. In addition, the scope of this disclosure is intended to cover such devices or methods that are practiced using other structures, functionalities, or structures and functionalities that are supplementary to or in addition to the various aspects of this disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be implemented by one or more elements of the claims. The word "exemplary" is used herein to mean "used as an example, instance, or illustration." Any aspect described herein as "exemplary" is not necessarily to be construed as superior to or superior to other aspects.

[0033] The techniques described herein can be used for various wireless communication technologies, such as LTE, CDMA, TDMA, FDMA, OFDMA, SC-FDMA, and other networks. The terms "network" and "system" are often used interchangeably. A CDMA network can implement radio technologies such as Universal Terrestrial Radio Access (UTRA) and cdma2000. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. cdma2000 covers the IS-2000, IS-95, and IS-856 standards. A TDMA network can implement radio technologies such as Global System for Mobile Communications (GSM). An OFDMA network can implement radio technologies such as NR (e.g., 5G RA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDMA, and others. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS).

[0034] New Radio (NR) is an emerging wireless communication technology being developed in collaboration with the 5G Technology Forum (5GTF). 3GPP Long Term Evolution (LTE) and Advanced LTE (LTE-A) are versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization called the "3rd Generation Partnership Project" (3GPP). CDMA2000 and UMB are described in documents from an organization called the "3rd Generation Partnership Project 2" (3GPP2). The techniques described herein may be used for the wireless networks and radio technologies mentioned above as well as other wireless networks and radio technologies. For clarity, although various aspects may be described herein using terms commonly associated with 3G and / or 4G wireless technologies, various aspects of the present disclosure may be applied in communication systems based on other generations, such as 5G and later generations, including NR technology.

[0035] New Radio (NR) access (e.g., 5G technology) can support various wireless communication services, such as enhanced mobile broadband (eMBB) targeting wide bandwidth (e.g., 80 MHz or higher), millimeter wave (mmW) targeting high carrier frequency (e.g., 25 GHz or higher), massive machine type communication (MTC) targeting non-backward compatible MTC technology, and / or mission critical services targeting ultra-reliable low latency communication (URLLC). These services may include latency and reliability requirements. These services may also have different transmission time intervals (TTIs) to meet corresponding quality of service (QoS) requirements. In addition, these services can coexist in the same subframe.

[0036] The teachings herein may be incorporated into (eg, implemented within or performed by) a variety of wired or wireless devices (eg, nodes). In some aspects, a wireless node implemented in accordance with the teachings herein may comprise an access point or an access terminal.

[0037] An access point ("AP") may include, be implemented as, or be referred to as a Node B, a radio network controller ("RNC"), an evolved Node B (eNB), a base station controller ("BSC"), a base transceiver station ("BTS"), a base station ("BS"), a transceiver function ("TF"), a radio router, a radio transceiver, a basic service set ("BSS"), an extended service set ("ESS"), a radio base station ("RBS"), an IAB node (e.g., an IAB donor node, an IAB parent node, and an IAB child node), or some other terminology.

[0038] An access terminal ("AT") may include, be implemented as, or be referred to as a subscriber station, subscriber unit, mobile station, remote station, remote terminal, user terminal, user agent, user device, user equipment, user station, or some other terminology. In some implementations, an access terminal may include a cellular phone, a cordless phone, a Session Initiation Protocol ("SIP") phone, a wireless local loop ("WLL") station, a personal digital assistant ("PDA"), a handheld device with wireless connection capability, a station ("STA"), or some other suitable processing device connected to a wireless modem (such as an AR / VR console and head-mounted device). Accordingly, one or more aspects taught herein may be incorporated into a phone (e.g., a cellular phone or smart phone), a computer (e.g., a laptop computer), a portable communication device, a portable computing device (e.g., a personal data assistant), an entertainment device (e.g., a music or video device, or a satellite radio), a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium. In some aspects, a node is a wireless node. Such a wireless node may provide connectivity for or to a network (eg, a wide area network such as the Internet or a cellular network), for example, via a wired or wireless communication link.

[0039] Example Wireless Communication System

[0040] Figure 1 An example wireless communication network 100 is illustrated in which aspects of the present disclosure may be implemented. Figure 1 As shown in FIG, UE 120a may include a UE radio capability identifier (URCID) component 121 and is configured to perform Figure 7 Furthermore, base station (BS) 110 (also referred to herein as access point (AP) 110) may be configured to perform operations complementary to those performed by UE 120a to provide at least one URCID.

[0041] For example, the wireless communication network 100 may be a New Radio (NR) or 5G network. Figure 1As illustrated in , the wireless communication network 100 may include several APs 110 and other network entities. An AP may be a station that communicates with user equipment (UE). Each AP 110 may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to the coverage area of ​​a Node B (NB) and / or the NB subsystem serving that coverage area, depending on the context in which the term is used. In NR systems, the terms "cell" and next-generation Node B (gNB or gNodeB), NR AP, 5G NB, or transmit reception point (TRP) may be interchangeable. In some examples, a cell may not necessarily be stationary, and the geographic area of ​​a cell may move depending on the location of a mobile AP. In some examples, access points may interconnect with each other and / or to one or more other access points or network nodes (not shown) in the wireless communication network 100 using any suitable transport network via various types of backhaul interfaces (such as direct physical connections, wireless connections, virtual networks, etc.).

[0042] In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a specific radio access technology (RAT) and may operate on one or more frequencies. A RAT may also be referred to as a radio technology, air interface, etc. A frequency may also be referred to as a carrier, subcarrier, frequency channel, tone, subband, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

[0043] An AP may provide communication coverage for macro cells, pico cells, femto cells, and / or other types of cells. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG), UEs of users in a residence, etc.). An AP for a macro cell may be referred to as a macro AP. An AP for a pico cell may be referred to as a pico AP. An AP for a femto cell may be referred to as a femto AP or a home AP. In Figure 1In the example shown in FIG, APs 110a, 110b, and 110c may be macro APs for macro cells 102a, 102b, and 102c, respectively. AP 110x may be a pico AP for pico cell 102x. APs 110y and 110z may be femto APs for femto cells 102y and 102z, respectively. An AP may support one or more (e.g., three) cells.

[0044] The wireless communication network 100 may also include a relay station. A relay station is a station that receives transmissions of data and / or other information from an upstream station (e.g., an AP or a UE) and sends transmissions of the data and / or other information to a downstream station (e.g., a UE or an AP). A relay station may also be a UE that relays transmissions for other UEs. Figure 1 In the example shown in , a relay station may communicate with AP 110a and UE 120a to facilitate communication between AP 110a and UE 120a. A relay station may also be referred to as an IAB node, relay AP, relay, or the like.

[0045] The wireless communication network 100 may be a heterogeneous network including different types of APs (e.g., macro APs, pico APs, femto APs, relays, etc.). These different types of APs may have different transmit power levels, different coverage areas, and different impacts on interference in the wireless communication network 100. For example, a macro AP may have a high transmit power level (e.g., 20 watts), while a pico AP, a femto AP, and a relay may have a lower transmit power level (e.g., 1 watt).

[0046] The wireless communication network 100 may support synchronous or asynchronous operation. For synchronous operation, each AP may have similar frame timing, and transmissions from different APs may be approximately aligned in time. For asynchronous operation, each AP may have different frame timing, and transmissions from different APs may not be aligned in time. The techniques described herein may be used for both synchronous and asynchronous operation.

[0047] The network controller 130 may couple to a set of APs and provide coordination and control for these APs. The network controller 130 may communicate with the APs 110 via a backhaul. The APs 110 may also communicate with each other (eg, directly or indirectly) via a wireless or wired backhaul.

[0048] UEs 120 (e.g., 120x, 120y, etc.) may be dispersed throughout the wireless communication network 100, and each UE may be stationary or mobile. A UE may also be referred to as a mobile station, terminal, access terminal, subscriber unit, station, customer premises equipment (CPE), cellular phone, smartphone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop, cordless phone, wireless local loop (WLL) station, tablet computer, camera, gaming device, netbook, smartbook, ultrabook, appliance, medical device or medical equipment, biometric sensor / device, wearable device (such as smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet, etc.)), entertainment device (e.g., music device, video device, satellite radio, etc.), vehicle component or sensor, smart meter / sensor, industrial manufacturing equipment, global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium. Some UEs may be considered machine type communication (MTC) devices or evolved MTC (eMTC) devices. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which can communicate with an AP, another device (e.g., a remote device), or some other entity. A wireless node can provide connectivity to or to a network (e.g., a wide area network (such as the Internet) or a cellular network) via, for example, a wired or wireless communication link. Some UEs may be considered Internet of Things (IoT) devices, which may be narrowband IoT (NB-IoT) devices.

[0049] Some wireless networks (e.g., LTE) utilize orthogonal frequency division multiplexing (OFDM) on the downlink (DL) and single-carrier frequency division multiplexing (SC-FDM) on the uplink (UL). OFDM and SC-FDM divide the system bandwidth into multiple (K) orthogonal subcarriers, often referred to as tones, bins, etc. Each subcarrier can be modulated with data. Generally speaking, modulation symbols are sent in the frequency domain for OFDM and in the time domain for SC-FDM. The spacing between adjacent subcarriers can be fixed, and the total number of subcarriers (K) can depend on the system bandwidth. For example, the subcarrier spacing can be 15 kHz, and the minimum resource allocation (called a "resource block" (RB)) can be 12 subcarriers (or 180 kHz). Therefore, for system bandwidths of 1.25, 2.5, 5, 10, or 20 megahertz (MHz), the nominal fast Fourier transform (FFT) size can be equal to 128, 256, 512, 1024, or 2048, respectively. The system bandwidth may be further divided into subbands. For example, a subband may cover 1.8 MHz (ie, 6 resource blocks), and there may be 1, 2, 4, 8, or 16 subbands for system bandwidths of 1.25, 2.5, 5, 10, or 20 MHz, respectively.

[0050] Although aspects of the examples described herein may be associated with LTE technology, aspects of the present disclosure may be applicable to other wireless communication systems, such as NR. NR may utilize OFDM with CP on both the uplink and downlink and include support for half-duplex operation using TDD. Beamforming may be supported and the beam direction may be dynamically configured. MIMO transmission with precoding may also be supported. MIMO configurations in the DL may support up to 8 transmit antennas (with multi-layer DL transmission of up to 8 streams) and up to 2 streams per UE. Multi-layer transmission of up to 2 streams per UE may be supported. Aggregation of multiple cells may be supported using up to 8 serving cells.

[0051] In some examples, access to the air interface may be scheduled. A scheduling entity (e.g., an AP) allocates resources for communication between some or all devices and equipment within its service area or cell. A scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communications, the subordinate entities utilize the resources allocated by the scheduling entity. An access point is not the only entity that can act as a scheduling entity. In some examples, a UE may act as a scheduling entity and may schedule resources for one or more subordinate entities (e.g., one or more other UEs), and other UEs may utilize the resources scheduled by the UE for wireless communication. In some examples, a UE may act as a scheduling entity in a peer-to-peer (P2P) network and / or in a mesh network. In the mesh network example, UEs may communicate directly with each other in addition to communicating with the scheduling entity.

[0052] exist Figure 1 In FIG, a solid line with double arrows indicates desired transmissions between a UE and a serving AP, which is an AP designated to serve the UE on the downlink and / or uplink. A thin dashed line with double arrows indicates interfering transmissions between a UE and an AP.

[0053] Figure 2 Illustrated are BS 110a and UE 120a (e.g., in Figure 1 Example components of the wireless communication network 100).

[0054] At BS 110a, transmit processor 220 may receive data from data source 212 and control information from controller / processor 240. This control information may be for a physical broadcast channel (PBCH), a physical control format indicator channel (PCFICH), a physical hybrid ARQ indicator channel (PHICH), a physical downlink control channel (PDCCH), a group common PDCCH (GC PDCCH), or the like. This data may be for a physical downlink shared channel (PDSCH), or the like. A medium access control (MAC)-control element (MAC-CE) is a MAC layer communication structure that may be used to exchange control commands between wireless nodes. For example, a base station may transmit a MAC CE to a UE to place the UE in discontinuous reception (DRX) mode to reduce the UE's power consumption. The MAC-CE may be carried in a shared channel, such as a physical downlink shared channel (PDSCH), a physical uplink shared channel (PUSCH), or a physical sidelink shared channel. The MAC-CE may also be used to convey information that facilitates communication, such as information regarding buffer status and available power headroom.

[0055] Processor 220 may process (e.g., encode and symbol map) data and control information to obtain data symbols and control symbols, respectively. Transmit processor 220 may also generate reference symbols (such as for a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a cell-specific reference signal (CRS)). A transmit (TX) multiple-input, multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, and / or reference symbols, as applicable, and may provide output symbol streams to modulators (MODs) 232a-232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator may further process (e.g., convert to analog, amplify, filter, and frequency upconvert) the output sample stream to obtain a downlink signal. The downlink signals from modulators 232a-232t may be transmitted via antennas 234a-234t, respectively.

[0056] At UE 120a, antennas 252a-252r may receive downlink signals from BS 110a and may provide received signals to demodulators (DEMODs) 254a-254r, respectively, within the transceiver. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) its respective received signal to obtain input samples. Each demodulator may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 may receive received symbols from all demodulators 254a-254r, perform MIMO detection on the received symbols where applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 120a to a data sink 260, and provide decoded control information to a controller / processor 280.

[0057] On the uplink, at UE 120a, a transmit processor 264 may receive and process data from a data source 262 (e.g., for a physical uplink shared channel (PUSCH)) and control information from a controller / processor 280 (e.g., for a physical uplink control channel (PUCCH)). The transmit processor 264 may also generate reference symbols for reference signals (e.g., a sounding reference signal (SRS)). The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266, if applicable, further processed by a demodulator in transceivers 254a-254r (e.g., for SC-FDM, etc.), and transmitted to BS 110a. At BS 110a, the uplink signal from UE 120a may be received by antenna 234, processed by modulator 232, detected by MIMO detector 236, if applicable, and further processed by receive processor 238 to obtain decoded data and control information sent by UE 120a. Receive processor 238 may provide decoded data to data sink 239 and decoded control information to controller / processor 240 .

[0058] Memories 242 and 282 may store data and program codes for BS 110a and UE 120a, respectively. A scheduler 244 may schedule UEs for data transmission on the downlink and / or uplink.

[0059] The controller / processor 280 (and / or other processors) and modules at the UE 120a may include a URCID component 281 configured to perform or direct the processes described herein (such as Figure 7 Although shown at the controller / processor, other components of the UE 120a and BS 110a may also be used to perform the operations described herein.

[0060] Figure 3 3 is a block diagram illustrating an example architecture of a core network (CN) 300 in communication with a RAN 324 according to certain aspects of the present disclosure. Figure 3 As shown in FIG, the example architecture includes CN 300, RAN 324, UE 322, and data network (DN) 328 (eg, operator services, Internet access, or third-party services).

[0061] CN 300 may host core network functions. CN 300 may be centrally deployed. CN 300 functionality may be offloaded (e.g., to Advanced Wireless Services (AWS)) in an effort to handle peak capacity. Figure 3As shown in the figure, the example CN 300 can be implemented by one or more network entities that perform network functions (NFs), including a network slice selection function (NSSF) 304, a network exposure function (NEF) 306, an NF repository function (NRF) 308, a policy control function (PCF) 310, a unified data management (UDM) 312, an application function (AF) 314, an authentication server function (AUSF) 316, an access and mobility management function (AMF) 318, a session management function (SMF) 320; a user plane function (UPF) 326, and various other functions (not shown) such as an unstructured data storage function (UDSF); a unified data repository (UDR); a 5G equipment identity register (5G-EIR); and / or a security edge protection proxy (SEPP).

[0062] The AMF 318 may include the following functionality (some or all of the AMF functionality may be supported in one or more instances of the AMF): termination of the RAN control plane (CP) interface (N2); termination of the non-access stratum (NAS) (e.g., N1), NAS encryption and integrity protection; registration management; connection management; reachability management; mobility management; lawful interception (for AMF events and interfaces to L1 systems); transmission of session management (SM) messages between the UE 322 and the SMF 320; transparent proxy for routing SM messages; access authentication; access authorization; transmission of short message service (SMS) messages between the UE 322 and the SMS function (SMSF); security anchor functionality (SEAF); security context management (SCM), which receives keys from the SEAF, which uses the keys to derive access network specific keys; location service management for regulated services; communication between the UE 322 and the location service management (LMF) and the RAN Transmission of positioning service messages between 324 and LMF; EPS bearer ID allocation for interworking with Evolved Packet Service (EPS); and / or UE mobility event notification; and / or other functionalities.

[0063] The SMF 320 can support session management (e.g., session establishment, modification, and release), UE IP address allocation and management, Dynamic Host Configuration Protocol (DHCP) functions, termination of NAS signaling related to session management, downlink data notification, and traffic steering configuration for the UPF for proper traffic routing. The UPF 326 can support packet routing and forwarding, packet inspection, Quality of Service (QoS) handling, an external Protocol Data Unit (PDU) session interconnection point to the DN 328, and an anchor point for intra-RAT and inter-RAT mobility. The PCF 310 can support a unified policy framework, provide policy rules to control protocol functions, and / or access subscription information in the UDR for policy decisions. The AUSF 316 can act as an authentication server. The UDM 312 can support the generation of authentication and key agreement (AKA) credentials, user identity handling, access authorization, and subscription management. The NRF 308 can support service discovery functions and maintain NF profiles and available NF instances. The NSSF may support: selection of a network slice instance for serving the UE 322, determination of allowed network slice selection assistance information (NSSAI), and / or determination of an AMF set to be used to serve the UE 322.

[0064] NEF 306 can support: opening of capabilities and events, secure provision of information from external applications to 3GPP network, translation of internal / external information. AF 314 can support: application influence on traffic routing, access to NEF 306 and / or interaction with policy framework for policy control.

[0065] like Figure 3 As shown in FIG, CN 300 can communicate with AS 302, UE 322, RAN 324, and DN 328. In some examples, CN 300 communicates with external AS 302 via NEF 306 and / or AF 314. In some examples, CN 300 communicates with RAN 324 (e.g., such as AMF 318) via AMF 318. Figure 1 10a) and / or UE 322 (e.g., such as BS 110a) in the wireless communication network 100 illustrated in FIG. Figure 1 1 and 2. The UE 120a) in the wireless communication network 100 illustrated in FIG.

[0066] The NSSF 304 supports the following functionality: selection of a network slice instance for serving the UE 322, determination of allowed network slice selection assistance information (NSSAI), and / or determination of an AMF set to be used to serve the UE 322.

[0067] Figure 4Illustrated is a diagram showing an example of a communication protocol stack 400 for implementing in a RAN (such as, for example, RAN 200) in accordance with various aspects of the present disclosure. The illustrated communication protocol stack 400 may be implemented by a device operating in a wireless communication system (such as a 5G NR system) (e.g., wireless communication network 100). In various examples, the layers of the protocol stack 400 may be implemented as separate software modules, as part of a processor or ASIC, as part of non-co-located devices connected by a communication link, or various combinations thereof. Co-located and non-co-located implementations may be used, for example, in a protocol stack for a network access device or UE. Figure 4 As shown in , the system can support various services on one or more protocols. One or more protocol layers of the protocol stack 400 can be implemented by an AN (e.g., Figure 2 AN 208, or Figure 1 The AP 110a) and / or UE (eg, UE 120) are implemented in the embodiment.

[0068] like Figure 4 As shown in FIG, the protocol stack 400 is split in the AN. The RRC layer 405, PDCP layer 410, RLC layer 415, MAC layer 420, PHY layer 425, and RF layer 430 may be implemented by the AN. For example, the CU-CP and CU-UP may each implement the RRC layer 405 and PDCP layer 410. The DU may implement the RLC layer 415 and MAC layer 420. However, the DU may also implement the PHY layer(s) 425 and the RF layer(s) 430 via the AU / RRU connected to the DU. The PHY layer 425 may include a high PHY layer and a low PHY layer.

[0069] UE (e.g. Figure 1 The UE 120a) may implement the entire protocol stack 400 (eg, the RRC layer 405, the PDCP layer 410, the RLC layer 415, the MAC layer 420, the PHY layer(s) 425, and the RF layer(s) 430).

[0070] Figure 5is a diagram illustrating an example of a frame format 500 for NR. The transmission timeline for each of the downlink and uplink may be divided into units of radio frames. Each radio frame may have a predetermined duration (e.g., 10 ms) and may be divided into 10 subframes with indices 0 to 9, each subframe being 1 ms. Each subframe may include a variable number of slots, depending on the subcarrier spacing. Each slot may include a variable number of symbol periods (e.g., 7 or 14 symbols), depending on the subcarrier spacing. The symbol periods in each slot may be assigned an index. A minislot (which may be referred to as a subslot structure) refers to a transmission time interval having a duration smaller than a slot (e.g., 2, 3, or 4 symbols). Each symbol in a slot may indicate a link direction (e.g., DL, UL, or flexible) for data transmission, and the link direction for each subframe may be dynamically switched. The link direction may be based on the slot format. Each slot may include DL / UL data and DL / UL control information.

[0071] In NR, a synchronization signal (SS) block is transmitted. The SS block includes PSS, SSS, and two-symbol PBCH. The SS block can be in a fixed time slot position (such as Figure 5 ) is transmitted in the codeword 0-3 shown in . PSS and SSS can be used by UE for cell search and acquisition. PSS can provide half-frame timing, and SS can provide CP length and frame timing. PSS and SSS can provide cell identity. PBCH carries some basic system information, such as downlink system bandwidth, timing information within the radio frame, SS burst set periodicity, system frame number, etc. SS blocks can be organized into SS bursts to support beam sweeping. Further system information (such as remaining minimum system information (RMSI), system information block (SIB), other system information (OSI)) can be transmitted on the physical downlink shared channel (PDSCH) in certain subframes. SS blocks can be transmitted up to 64 times, for example, for mmW, with up to 64 different beam directions. Up to 64 transmissions of SS blocks are called SS burst sets. SS blocks in an SS burst set are transmitted in the same frequency region, while SS blocks in different SS burst sets can be transmitted at different frequency positions.

[0072] Example Delay / Avoid URCID Update for EPLMN

[0073] Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for updating a user equipment (UE) radio capability ID (URCID) when the UE moves to a new public land mobile network (PLMN) within its registration area. These techniques can help avoid unnecessary signaling traffic and reduce UE power consumption.

[0074] For (re)selection, a PLMN is identified by its PLMN identity, which is broadcast within a system information block (SIB) (e.g., SIB-1). A single cell can belong to multiple PLMNs, so SIB-1 can broadcast a list of PLMN identities. The steps for PLMN selection typically involve a request from the UE non-access stratum (NAS) layer of the access stratum (AS) layer to report the available PLMN(s). The UE NAS layer is then responsible for selecting a PLMN from this reported list of PLMNs.

[0075] The UE typically scans the RF channels within its supported radio frequency (RF) bands and searches for the strongest cell carrier and reads the SIB to identify the PLMN. The UE can use stored information such as RF carrier and cell parameters to enhance the PLMN search procedure. The NAS layer can stop the search at any point, for example, after finding the home PLMN.

[0076] Based on the reported PLMN list, the UE uses the User Subscriber Identity Module (USIM) information for PLMN selection. Equivalent PLMN refers to the set of PLMNs that are equivalent to the PLMN with which the UE is registered. This set can be updated during the attach or tracking area update procedure.

[0077] In some cases, reselection may be based on the UE's desire to switch between different capabilities, for example, based on the UE's region / location. For example, operators often have different deployments in different areas (e.g., some areas have 400MHz compared to some areas with 800MHz mmW). In order to manipulate or work around certain network configurations (e.g., the network may configure the maximum layer on LTE and give the minimum bandwidth to NR, even though the UE allows 800MHz on mmW via the band combination indication), the UE may switch between different UE radio capabilities. In this example, the UE may have capability U1 that lists the 400MHz band combination and capability U2 that only lists the 800MHz band combination. When the UE is in the 400MHz deployment area, the UE may announce U1, and if the UE moves to the 800MHz deployment area, the UE may set a different capability U2 in the service request procedure and cause the network to use the 800MHz related band combination list.

[0078] In current systems utilizing Radio Capability Signaling (RACS), URCIDs are assigned by individual PLMNs and are not applicable across PLMNs (even EPLMNs). This constraint can lead to certain issues in terms of network signaling traffic and UE power consumption. When a UE reselects to an EPLMN (e.g., when idle), it must perform a registration procedure with the new PLMN to inform the network about the UE radio capability ID applicable to that network.

[0079] exist Figure 6 The procedure is illustrated in the call flow diagram of , which assumes that the UE has been assigned a UE Radio Capability ID (URCID-B) due to a past / previous registration to the EPLMN (PLMN-B).

[0080] When the UE subsequently registers in the RPLMN (PLMN-A), the network sends the UE a Tracking Area Identifier (TAI) list containing the TAIs from the EPLMN (PLMN-B) and RPLMN (PLMN-A). The RPLMN (PLMN-A) also assigns the UE a Radio Capability ID (URCID-A).

[0081] In the illustrated example, the UE moves to the EPLMN (reselecting PLMN-B) when in idle mode. Under the above constraints, the UE needs to send a registration request to the EPLMN (PLMN-B) to notify the previously assigned URCID (URCID-B).

[0082] This restriction effectively means that a RACS capable UE with a URCID assigned by one PLMN will have to trigger a mobility registration every time it crosses a PLMN boundary, even if the UE is registered in a Tracking Area (TA) list containing Tracking Area Codes (TACs) from an equivalent PLMN.

[0083] This will generate unnecessary signaling traffic, as the URCID is only useful to the network when the UE enters Connection Management (CM) connected mode. From the perspective of UE power consumption, this unnecessary signaling is costly.

[0084] Thus, aspects of the present disclosure provide techniques for a UE to delay (or avoid) initiating a procedure designed to update a URCID when the UE changes PLMNs (but remains within the same registration area).

[0085] For example, to avoid unnecessary transmission(s) of Registration Request(s), the UE may wait to update the URCID in the Service Request procedure or Registration Request only for transitioning to CM connected mode (e.g., due to paging or MO voice / data call).

[0086] In other words, when a UE changes PLMNs within the same registration area, the network has all the UE radio capability information required to successfully page the UE. Therefore, the UE may not need to immediately report the applicable URCID in the EPLMN and may not require special triggering of mobility registration when the UE crosses a PLMN boundary (e.g., between a registered PLMN (RPLMN) and an EPLMN).

[0087] Figure 71 illustrates example operations 700 for wireless communications by a UE, in accordance with certain aspects of the present disclosure. Operations 700 may be performed, for example, by a UE 120 (e.g., Figure 1 or any UE shown in 2) to execute.

[0088] Operations 700 begin by receiving at least one URCID assigned by a first PLMN at 702. At 704, when the UE moves to a second PLMN in the same registration area as the first PLMN, the UE takes one or more actions to delay or avoid updating the URCID.

[0089] Please refer to Figure 8 The call flow diagram 800 is used to understand Figure 7 Operation 700 is performed to delay or avoid unnecessary sending of a registration request for the sole purpose of URCID notification.

[0090] Figure 8 The example of also assumes that the UE has been assigned a URCID (eg, URCID-B) due to a past / previous registration with an EPLMN (eg, PLMN-B), and that the UE subsequently registers in an RPLMN (eg, PLMN-A).

[0091] and Figure 6 In contrast to the example shown in , in which when the UE moves to an EPLMN within the same registration area (e.g., reselects PLMN-B) in the idle state and has no immediate need to establish a data connection, it does not immediately send a registration request to the EPLMN (PLMN-B) to notify the previously assigned URCID (URCID-B).

[0092] Instead, the UE delays URCID notification until the UE is ready to transition to connected mode (e.g., due to paging or MO data / voice call). As illustrated, the UE sends the URCID in a service request procedure (or registration request), but only for transitioning to the connected mode state (CM-Connected).

[0093] Therefore, with the proposed technology, when the UE crosses a PLMN boundary (e.g., between an RPLMN and an EPLMN), no special triggering of mobility registration may be required. As a result, the UE can avoid unnecessary signaling traffic, which can help reduce UE power consumption.

[0094] In some cases, the UE may use such a service request procedure to dynamically update the URCID to use. For example, the UE may be assigned URCIDs U1 and U2 by the network (eg, through different registration procedures performed in the past).

[0095] In certain aspects, each URCID may correspond to a different radio capability setting on the UE. For example, as mentioned above, U1 may correspond to UE capability information containing a first list of frequency band combinations, and U2 may correspond to UE capability information containing a second (different) list of frequency band combinations. In a registration request, the UE may send URCID U1. Subsequently, in a service request, the UE may indicate URCID U2, effectively requesting a handover to U2.

[0096] Example aspects

[0097] Figure 9 Illustrated are methods that may include being configured to perform operations for the techniques disclosed herein (such as Figure 7 900 includes various components (e.g., corresponding to means-plus-function components) of the communication device 900 and the operations illustrated in the accompanying drawings. The communication device 900 includes a processing system 902 coupled to a transceiver 908. The transceiver 908 is configured to transmit and receive signals for the communication device 900 (such as the various signals described herein) via an antenna 910. The processing system 902 can be configured to perform processing functions for the communication device 900, including processing signals received and / or to be transmitted by the communication device 900.

[0098] The processing system 902 includes a processor 904 coupled to a computer readable medium / memory 912 via a bus 906. In some aspects, the computer readable medium / memory 912 is configured to store programs that, when executed by the processor 904, cause the processor 904 to perform Figure 7 Instructions (e.g., computer executable code) for performing the operations illustrated in or other operations for switching between a PC5 path and a Uu path. In certain aspects, the computer-readable medium / memory 912 stores: code 914 for receiving at least one UE radio capability identifier (URCID) assigned by a first public land mobile network (PLMN); and code 916 for taking one or more actions to delay or avoid updating the URCID when moving to a second PLMN in the same registration area as the first PLMN. In certain aspects, the processor 904 has circuitry configured to implement the code stored in the computer-readable medium / memory 912. The processor 904 includes circuitry 920 for receiving at least one UE radio capability identifier (URCID) assigned by the first public land mobile network (PLMN); and circuitry 922 for taking one or more actions to delay or avoid updating the URCID when moving to a second PLMN in the same registration area as the first PLMN.

[0099] Example aspects

[0100] Aspect 1: A method for wireless communication by a user equipment (UE), comprising: receiving at least one UE radio capability identifier (URCID) assigned by a first public land mobile network (PLMN); and taking one or more actions to delay or avoid updating the URCID when moving to a second PLMN in the same registration area as the first PLMN.

[0101] Aspect 2: The method of aspect 1, wherein the first PLMN and the second PLMN are equivalent PLMNs (EPLMNs); and the one or more actions include delaying initiation of a procedure associated with notifying the second PLMN of the URCID.

[0102] Aspect 3: The method of aspect 2, wherein the one or more actions further include notifying the second PLMN of the URCID using a registration request procedure when the UE initiates a connection with the EPLMN.

[0103] Aspect 4: The method of aspect 2 or 3, wherein the one or more actions further include notifying the second PLMN of the URCID using a service request procedure when the UE initiates a connection with the EPLMN.

[0104] Aspect 5: The method of aspect 4, wherein the UE initiates a connection with the EPLMN due to at least one of paging or a mobile originated voice or data call.

[0105] Aspect 6: The method of any one of aspects 1-5, wherein: the UE is assigned at least a first URCID and a second URCID through different registration procedures, each URCID corresponding to a different radio capability setting; and the UE signals the first URCID in the registration request.

[0106] Aspect 7: The method of aspect 6, wherein the UE signals the second URCID in a service request as a request to switch from the first URCID to the second URCID.

[0107] Aspect 8: An apparatus comprising: a memory comprising executable instructions; and one or more processors configured to execute the executable instructions and cause the apparatus to perform the method according to any one of aspects 1-7.

[0108] Aspect 9: An apparatus comprising means for performing the method according to any one of aspects 1-7.

[0109] Aspect 10: A non-transitory computer-readable medium comprising executable instructions that, when executed by one or more processors of a device, cause the device to perform the method according to any one of aspects 1-7.

[0110] Aspect 11: A computer program product embodied on a computer-readable storage medium, the computer-readable storage medium comprising code for executing the method according to any one of aspects 1-7.

[0111] Additional considerations

[0112] The foregoing description is provided to enable anyone skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the universal principles defined herein may be applied to other aspects. Accordingly, the claims are not intended to be limited to the aspects shown herein, but rather to be given the full scope consistent with the language of the claims, wherein singular references to elements, unless otherwise specified, are not intended to mean "one and only one," but rather "one or more." Unless otherwise specified, the terms "some" and "some" refer to one or more. All structural and functional equivalents of the various aspects described throughout this disclosure to those skilled in the art, whether now or hereafter known, are expressly incorporated herein by reference and are intended to be covered by the claims. Furthermore, nothing disclosed herein is intended to be dedicated to the public, regardless of whether such disclosure is explicitly recited in the claims. No element of a claim should be construed under 35 U.S.C. §112, sixth paragraph, unless the element is explicitly recited using the phrase "means for..." or, in the case of a method claim, the element is recited using the phrase "step for..."

[0113] The various operations of the methods described above may be performed by any suitable device capable of performing the corresponding functions. These devices may include various hardware and / or software components and / or modules, including but not limited to circuits, application-specific integrated circuits (ASICs), or processors. Generally speaking, where there are operations illustrated in the figures, these operations may have corresponding counterparts, including device-plus-function components.

[0114] As used herein, the term "determining" encompasses a wide variety of actions. For example, "determining" may include calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, database, or another data structure), ascertaining, and the like. Furthermore, "determining" may include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), and the like. Furthermore, "determining" may include resolving, selecting, choosing, establishing, and the like.

[0115] As used herein, a phrase referring to "at least one of" a list of items refers to any combination of those items, including individual members. As an example, "at least one of a, b, or c" is intended to cover a, b, c, ab, ac, bc, and abc, as well as combinations including multiples of one or more members (aa, bb, and / or cc).

[0116] The various illustrative logical blocks, modules, and circuits described in conjunction with the present disclosure may be implemented or executed with a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0117] The steps of the method or algorithm described in conjunction with the present disclosure can be implemented directly in hardware, in a software module executed by a processor, or in a combination of the two. The software module can reside in any form of storage medium known in the art. Some examples of usable storage media include random access memory (RAM), read-only memory (ROM), flash memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, etc. The software module can include a single instruction or many instructions and can be distributed over several different code segments, distributed between different programs and distributed across multiple storage media. A storage medium can be coupled to a processor so that the processor can read and write information from / to the storage medium. In an alternative, a storage medium can be integrated into the processor.

[0118] The methods disclosed herein include one or more steps or actions for achieving the described method. These method steps and / or actions may be interchangeable with one another without departing from the scope of the claims. In other words, unless a specific order of steps or actions is specified, the order and / or use of the specific steps and / or actions may be modified without departing from the scope of the claims.

[0119] The means for receiving or the means for obtaining may include Figure 2 10, or the receive processor 258 or antenna(s) 252 of the UE 120. The means for transmitting or the means for outputting may include Figure 22. The transmitter (such as transmit processor 220) or antenna(s) 234 of access point 110, or transmit processor 264 or antenna(s) 252 of UE 120, as illustrated in FIG. Means for associating, means for determining, means for monitoring, means for deciding, means for providing, means for detecting, means for performing, and / or means for setting may include a processing system that may include one or more processors, such as Figure 2 1. The receive processor 238 / 258, transmit processor 220 / 264, TX MIMO processor 230 / 266, or controller 240 / 280 of the access point 110 and UE 120 illustrated in FIG.

[0120] In some cases, a device may not actually transmit frames, but may instead have an interface (means for outputting) for outputting frames for transmission. For example, a processor may output frames to a radio frequency (RF) front end via a bus interface for transmission. Similarly, a device may not actually receive frames, but may instead have an interface (means for acquiring) for acquiring frames received from another device. For example, a processor may acquire (or receive) frames from an RF front end via a bus interface for reception.

[0121] The functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in hardware, an example hardware configuration may include a processing system in a wireless node. The processing system may be implemented using a bus architecture. Depending on the specific application and overall design constraints of the processing system, the bus may include any number of interconnecting buses and bridges. The bus may link together various circuits including a processor, a machine-readable medium, and a bus interface. The bus interface may be used to connect a network adapter, etc., to the processing system via the bus. The network adapter may be used to implement signal processing functions at the PHY layer. In the UE 120 (see Figure 1 ), a user interface (e.g., a keypad, display, mouse, joystick, etc.) may also be connected to the bus. The bus may also link various other circuits (such as timing sources, peripheral devices, voltage regulators, power management circuits, etc.), which are well known in the art and will not be described in detail.

[0122] The processor may be responsible for managing the bus and general processing, including executing software stored on a machine-readable medium. The processor may be implemented with one or more general-purpose and / or special-purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuit systems capable of executing software. Software should be broadly interpreted to mean instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or other. As an example, a machine-readable medium may include RAM (random access memory), flash memory, ROM (read-only memory), PROM (programmable read-only memory), EPROM (erasable programmable read-only memory), EEPROM (electrically erasable programmable read-only memory), registers, magnetic disks, optical disks, hard drives, or any other suitable storage medium, or any combination thereof. The machine-readable medium may be implemented in a computer program product. The computer program product may include packaging materials.

[0123] In a hardware implementation, the machine-readable medium may be a portion of the processing system that is separate from the processor. However, as will be readily appreciated by those skilled in the art, the machine-readable medium or any portion thereof may be external to the processing system. As an example, the machine-readable medium may include a transmission line, a carrier wave modulated by data, and / or a computer product separate from a wireless node, all of which may be accessed by the processor via a bus interface. Alternatively or additionally, the machine-readable medium or any portion thereof may be integrated into the processor, as may be the case with a cache and / or general register file.

[0124] The processing system can be configured as a general-purpose processing system having one or more microprocessors providing processor functionality and external memory providing at least a portion of the machine-readable medium, all linked together with other supporting circuitry via an external bus architecture. Alternatively, the processing system can be implemented as an ASIC (application-specific integrated circuit) with a processor, bus interface, user interface (in the case of an access terminal), supporting circuitry, and at least a portion of the machine-readable medium integrated into a single chip, or as one or more FPGAs (field programmable gate arrays), PLDs (programmable logic devices), controllers, state machines, gating logic, discrete hardware components, or any other suitable circuitry, or any combination of circuits capable of performing the various functionalities described throughout this disclosure. Depending on the specific application and the overall design constraints imposed on the overall network or system, those skilled in the art will recognize how to best implement the functionality described with respect to the processing system.

[0125] The machine-readable medium may include a plurality of software modules. These software modules include instructions that, when executed by a processor, cause a processing system to perform various functions. These software modules may include a transmitting module and a receiving module. Each software module may reside in a single storage device or be distributed across multiple storage devices. As an example, when a triggering event occurs, a software module may be loaded from a hard drive into RAM. During execution of the software module, the processor may load some instructions into a cache to increase access speed. One or more cache lines may then be loaded into a general register file for execution by the processor. When describing the functionality of a software module below, it will be understood that such functionality is implemented by the processor when the processor executes instructions from the software module.

[0126] If implemented in software, each function may be stored as one or more instructions or codes on or transmitted by a computer-readable medium. Computer-readable media include both computer storage media and communication media, including any media that facilitate the transfer of a computer program from one place to another. Storage media can be any available medium that can be accessed by a computer. By way of example and not limitation, such computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer. Similarly, any connection is also properly referred to as a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technology (such as infrared (IR), radio, and microwave), the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technology (such as infrared, radio, and microwave) is included in the definition of medium. As used herein, disk and disc include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Disks typically reproduce data magnetically, while discs reproduce data optically using lasers. Thus, in some aspects, computer-readable media may include non-transitory computer-readable media (e.g., tangible media). Additionally, for other aspects, computer-readable media may include transient computer-readable media (e.g., signals). Combinations of the above should also be included within the scope of computer-readable media.

[0127] Thus, some aspects may include a computer program product for performing the operations presented herein. For example, such a computer program product may include a computer-readable medium having stored (and / or encoded) thereon instructions, which are executable by one or more processors to perform the operations described herein. For some aspects, the computer program product may include packaging materials.

[0128] In addition, it should be appreciated that modules and / or other appropriate means for performing the methods and techniques described herein can be downloaded and / or otherwise obtained by a user terminal and / or access point where applicable. For example, such a device can be coupled to a server to facilitate the transfer of means for performing the methods described herein. Alternatively, the various methods described herein can be provided via a storage device (e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or floppy disk, etc.) so that once the storage device is coupled to or provided to a user terminal and / or access point, the device can obtain the various methods. In addition, any other suitable technology suitable for providing the methods and techniques described herein to a device can be utilized.

[0129] It will be understood that the claims are not limited to the precise configuration and components illustrated above. Various changes, substitutions and variations may be made in the arrangement, operation and details of the methods and apparatus described above without departing from the scope of the claims.

Claims

1. A method for wireless communication by a user equipment (UE), comprising: receiving at least one UE radio capability identifier (URCID) assigned by a first public land mobile network (PLMN); delaying or avoiding updating the URCID when moving to a second PLMN in the same registration area as the first PLMN; as well as When the UE initiates a connection with the second PLMN, a registration request procedure with the second PLMN is performed to notify the second PLMN of the URCID.

2. The method of claim 1, wherein: The first PLMN and the second PLMN are equivalent PLMNs (EPLMNs); and Delaying or avoiding updating the URCID includes delaying initiating procedures associated with notifying the second PLMN of the URCID.

3. The method of claim 2, further comprising notifying the second PLMN of the URCID using a service request procedure when the UE initiates a connection with the second PLMN.

4. The method of claim 3, wherein the UE initiates connection with the second PLMN due to at least one of paging or a mobile originated voice or data call.

5. The method of claim 1, wherein: The UE is assigned at least a first URCID and a second URCID through different registration procedures, each URCID corresponding to a different radio capability setting; and The UE signals the first URCID in a registration request.

6. The method of claim 5, wherein the UE signals the second URCID in a service request as a request to switch from the first URCID to the second URCID.

7. An apparatus for wireless communication by a user equipment (UE), comprising: means for receiving at least one UE radio capability identifier (URCID) assigned by a first public land mobile network (PLMN); means for delaying or avoiding updating the URCID when moving to a second PLMN in the same registration area as the first PLMN; as well as means for performing a registration request procedure with the second PLMN to inform the second PLMN of the URCID when the UE initiates a connection with the second PLMN.

8. The apparatus of claim 7, wherein: The first PLMN and the second PLMN are equivalent PLMNs (EPLMNs); and Means for delaying or avoiding updating the URCID include means for delaying initiating procedures associated with notifying the second PLMN of the URCID.

9. The apparatus of claim 8, further comprising means for notifying the second PLMN of the URCID using a service request procedure when the UE initiates a connection with the second PLMN.

10. The apparatus of claim 9, wherein the UE initiates connection with the second PLMN due to at least one of paging or a mobile originated voice or data call.

11. The apparatus of claim 7, wherein: The UE is assigned at least a first URCID and a second URCID through different registration procedures, each URCID corresponding to a different radio capability setting; and The UE signals the first URCID in a registration request.

12. The apparatus of claim 11, wherein the UE signals the second URCID in a service request as a request to switch from the first URCID to the second URCID.

13. An apparatus for wireless communication by a user equipment (UE), comprising: a receiver configured to receive at least one UE radio capability identifier (URCID) assigned by a first public land mobile network (PLMN); at least one processor configured to delay or avoid updating the URCID when moving to a second PLMN in the same registration area as the first PLMN; as well as The at least one processor is further configured to perform a registration request procedure with the second PLMN to notify the second PLMN of the URCID when the UE initiates a connection with the second PLMN.

14. The apparatus of claim 13, wherein: The first PLMN and the second PLMN are equivalent PLMNs (EPLMNs); and The at least one processor configured to delay or avoid updating the URCID is further configured to delay initiating a procedure associated with notifying the second PLMN of the URCID.

15. The apparatus of claim 14, wherein the at least one processor is further configured to notify the second PLMN of the URCID using a service request procedure when the UE initiates a connection with the second PLMN.

16. The apparatus of claim 15, wherein the UE initiates connection with the second PLMN due to at least one of paging or a mobile originated voice or data call.

17. The apparatus of claim 13, wherein: The UE is assigned at least a first URCID and a second URCID through different registration procedures, each URCID corresponding to a different radio capability setting; and The UE signals the first URCID in a registration request.

18. The apparatus of claim 17, wherein the UE signals the second URCID in a service request as a request to switch from the first URCID to the second URCID.

19. A computer-readable medium for wireless communication by a user equipment (UE), having stored thereon instructions for: receiving at least one UE radio capability identifier (URCID) assigned by a first public land mobile network (PLMN); delaying or avoiding updating the URCID when moving to a second PLMN in the same registration area as the first PLMN; and When the UE initiates a connection with the second PLMN, a registration request procedure with the second PLMN is performed to notify the second PLMN of the URCID.

20. The computer-readable medium of claim 19, wherein: The first PLMN and the second PLMN are equivalent PLMNs (EPLMNs); and The instructions to delay or avoid updating the URCID include instructions to delay initiating procedures associated with notifying the second PLMN of the URCID.

21. The computer-readable medium of claim 20, further comprising instructions for notifying the second PLMN of the URCID using a service request procedure when the UE initiates a connection with the second PLMN.

22. The computer-readable medium of claim 21, wherein the UE initiates connection with the second PLMN due to at least one of paging or a mobile-originated voice or data call.

23. The computer-readable medium of claim 19, wherein: The UE is assigned at least a first URCID and a second URCID through different registration procedures, each URCID corresponding to a different radio capability setting; and The UE signals the first URCID in a registration request.

24. The computer-readable medium of claim 23, wherein the UE signals the second URCID in a service request as a request to switch from the first URCID to the second URCID.

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