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WO2025190034A1 - Amélioration d'exécution de sélection de plmn à haute priorité après une procédure de désenregistrement - Google Patents

Amélioration d'exécution de sélection de plmn à haute priorité après une procédure de désenregistrement

Info

Publication number
WO2025190034A1
WO2025190034A1 PCT/CN2025/077357 CN2025077357W WO2025190034A1 WO 2025190034 A1 WO2025190034 A1 WO 2025190034A1 CN 2025077357 W CN2025077357 W CN 2025077357W WO 2025190034 A1 WO2025190034 A1 WO 2025190034A1
Authority
WO
WIPO (PCT)
Prior art keywords
deregistration
mode
timer
mode capability
enabling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2025/077357
Other languages
English (en)
Inventor
Puneet PUNEET
Yu-Hsin Lin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MediaTek Inc
Original Assignee
MediaTek Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MediaTek Inc filed Critical MediaTek Inc
Publication of WO2025190034A1 publication Critical patent/WO2025190034A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/06—De-registration or detaching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/04—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration using triggered events

Definitions

  • the present disclosure relates generally to communication systems, and more particularly, to techniques of handling high priority PLMN selection execution after de-registration procedure.
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts.
  • Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple-access technologies include 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.
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single-carrier frequency division multiple access
  • TD-SCDMA time division synchronous code division multiple access
  • 5G New Radio is part of a continuous mobile broadband evolution promulgated by Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with Internet of Things (IoT) ) , and other requirements.
  • 3GPP Third Generation Partnership Project
  • Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard.
  • LTE Long Term Evolution
  • a method, a computer-readable medium, and an apparatus are provided.
  • the method may be performed by a UE.
  • the UE identifies occurrence of deregistration initiated by the UE.
  • the UE determines whether the deregistration is related to a timer that interferes with enabling of N1 mode capability of the UE.
  • the UE maintains the enabling of the N1 mode capability of the UE.
  • the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims.
  • the following description and the annexed drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed, and this description is intended to include all such aspects and their equivalents.
  • FIG. 1 is a diagram illustrating an example of a wireless communications system and an access network.
  • FIG. 2 is a diagram illustrating a base station in communication with a UE in an access network.
  • FIG. 3 illustrates an example logical architecture of a distributed access network.
  • FIG. 4 illustrates an example physical architecture of a distributed access network.
  • FIG. 5 is a diagram showing an example of a DL-centric slot.
  • FIG. 6 is a diagram showing an example of an UL-centric slot.
  • FIG. 7 is a diagram illustrating a wireless communication system that supports PLMN selection in a 5G network.
  • FIG. 8 is a flow chart of a method for handling high priority PLMN selection execution after de-registration procedure.
  • processors include microprocessors, microcontrollers, graphics processing units (GPUs) , central processing units (CPUs) , application processors, digital signal processors (DSPs) , reduced instruction set computing (RISC) processors, systems on a chip (SoC) , baseband processors, field programmable gate arrays (FPGAs) , programmable logic devices (PLDs) , state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionality described throughout this disclosure.
  • processors in the processing system may execute software.
  • Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
  • the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, the functions may be stored on or encoded as one or more instructions or code on a computer-readable medium.
  • Computer-readable media includes computer storage media. Storage media may be any available media that can be accessed by a computer.
  • such computer-readable media can comprise a random-access memory (RAM) , a read-only memory (ROM) , an electrically erasable programmable ROM (EEPROM) , optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of the aforementioned types of computer-readable media, or any other medium that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer.
  • RAM random-access memory
  • ROM read-only memory
  • EEPROM electrically erasable programmable ROM
  • optical disk storage magnetic disk storage
  • magnetic disk storage other magnetic storage devices
  • combinations of the aforementioned types of computer-readable media or any other medium that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer.
  • FIG. 1 is a diagram illustrating an example of a wireless communications system and an access network 100.
  • the wireless communications system (also referred to as a wireless wide area network (WWAN) ) includes base stations 102, UEs 104, an Evolved Packet Core (EPC) 160, and another core network 190 (e.g., a 5G Core (5GC) ) .
  • the base stations 102 may include macrocells (high power cellular base station) and/or small cells (low power cellular base station) .
  • the macrocells include base stations.
  • the small cells include femtocells, picocells, and microcells.
  • the base stations 102 configured for 4G LTE may interface with the EPC 160 through backhaul links 132 (e.g., SI interface) .
  • the base stations 102 configured for 5G NR may interface with core network 190 through backhaul links 184.
  • NG-RAN Next Generation RAN
  • the base stations 102 may perform one or more of the following functions: transfer of user data, radio channel ciphering and deciphering, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity) , inter cell interference coordination, connection setup and release, load balancing, distribution for non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS) , subscriber and equipment trace, RAN information management (RIM) , paging, positioning, and delivery of warning messages.
  • NAS non-access stratum
  • RAN radio access network
  • MBMS multimedia broadcast multicast service
  • RIM RAN information management
  • the base stations 102 may communicate directly or indirectly (e.g., through the EPC 160 or core network 190) with each other over backhaul links 134 (e.g., X2 interface) .
  • the backhaul links 134 may be wired or wireless.
  • the base stations 102 may wirelessly communicate with the UEs 104. Each of the base stations 102 may provide communication coverage for a respective geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, the small cell 102’ may have a coverage area 110’ that overlaps the coverage area 110 of one or more macro base stations 102.
  • a network that includes both small cell and macrocells may be known as a heterogeneous network.
  • a heterogeneous network may also include Home Evolved Node Bs (eNBs) (HeNBs) , which may provide service to a restricted group known as a closed subscriber group (CSG) .
  • eNBs Home Evolved Node Bs
  • HeNBs Home Evolved Node Bs
  • CSG closed subscriber group
  • the communication links 120 between the base stations 102 and the UEs 104 may include uplink (UL) (also referred to as reverse link) transmissions from a UE 104 to a base station 102 and/or downlink (DL) (also referred to as forward link) transmissions from a base station 102 to a UE 104.
  • the communication links 120 may use multiple-input and multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and/or transmit diversity.
  • the communication links may be through one or more carriers.
  • the base stations 102/UEs 104 may use spectrum up to 7 MHz (e.g., 5, 10, 15, 20, 100, 400, etc.
  • the component carriers may include a primary component carrier and one or more secondary component carriers.
  • a primary component carrier may be referred to as a primary cell (PCell) and a secondary component carrier may be referred to as a secondary cell (SCell) .
  • D2D communication link 158 may use the DL/UL WWAN spectrum.
  • the D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH) , a physical sidelink discovery channel (PSDCH) , a physical sidelink shared channel (PSSCH) , and a physical sidelink control channel (PSCCH) .
  • sidelink channels such as a physical sidelink broadcast channel (PSBCH) , a physical sidelink discovery channel (PSDCH) , a physical sidelink shared channel (PSSCH) , and a physical sidelink control channel (PSCCH) .
  • sidelink channels such as a physical sidelink broadcast channel (PSBCH) , a physical sidelink discovery channel (PSDCH) , a physical sidelink shared channel (PSSCH) , and a physical sidelink control channel (PSCCH) .
  • D2D communication may be through a variety of wireless D2D communications systems, such as for example, FlashLinQ, WiMedia,
  • the wireless communications system may further include a Wi-Fi access point (AP) 150 in communication with Wi-Fi stations (STAs) 152 via communication links 154 in a 5 GHz unlicensed frequency spectrum.
  • AP Wi-Fi access point
  • STAs Wi-Fi stations
  • communication links 154 in a 5 GHz unlicensed frequency spectrum.
  • the STAs 152/AP 150 may perform a clear channel assessment (CCA) prior to communicating in order to determine whether the channel is available.
  • CCA clear channel assessment
  • the small cell 102’ may operate in a licensed and/or an unlicensed frequency spectrum. When operating in an unlicensed frequency spectrum, the small cell 102’ may employ NR and use the same 5 GHz unlicensed frequency spectrum as used by the Wi-Fi AP 150. The small cell 102’ , employing NR in an unlicensed frequency spectrum, may boost coverage to and/or increase capacity of the access network.
  • a base station 102 may include an eNB, gNodeB (gNB) , or another type of base station.
  • Some base stations, such as gNB 180 may operate in a traditional sub 6 GHz spectrum, in millimeter wave (mmW) frequencies, and/or near mmW frequencies in communication with the UE 104.
  • mmW millimeter wave
  • mmW millimeter wave
  • mmW base station Extremely high frequency (EHF) is part of the RF in the electromagnetic spectrum. EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 millimeter and 10 millimeters.
  • Radio waves in the band may be referred to as a millimeter wave.
  • Near mmW may extend down to a frequency of 3 GHz with a wavelength of 100 millimeters.
  • the super high frequency (SHF) band extends between 3 GHz and 30 GHz, also referred to as centimeter wave.
  • Communications using the mmW/near mmW radio frequency band (e.g., 3 GHz -300 GHz) has extremely high path loss and a short range.
  • the mmW base station 180 may utilize beamforming 182 with the UE 104 to compensate for the extremely high path loss and short range.
  • the base station 180 may transmit a beamformed signal to the UE 104 in one or more transmit directions 108a.
  • the UE 104 may receive the beamformed signal from the base station 180 in one or more receive directions 108b.
  • the UE 104 may also transmit a beamformed signal to the base station 180 in one or more transmit directions.
  • the base station 180 may receive the beamformed signal from the UE 104 in one or more receive directions.
  • the base station 180/UE 104 may perform beam training to determine the best receive and transmit directions for each of the base station 180/UE 104.
  • the transmit and receive directions for the base station 180 may or may not be the same.
  • the transmit and receive directions for the UE 104 may or may not be the same.
  • the EPC 160 may include a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and a Packet Data Network (PDN) Gateway 172.
  • MME Mobility Management Entity
  • MBMS Multimedia Broadcast Multicast Service
  • BM-SC Broadcast Multicast Service Center
  • PDN Packet Data Network
  • the MME 162 may be in communication with a Home Subscriber Server (HSS) 174.
  • HSS Home Subscriber Server
  • the MME 162 is the control node that processes the signaling between the UEs 104 and the EPC 160.
  • the MME 162 provides bearer and connection management. All user Internet protocol (IP) packets are transferred through the Serving Gateway 166, which itself is connected to the PDN Gateway 172.
  • IP Internet protocol
  • the PDN Gateway 172 provides UE IP address allocation as well as other functions.
  • the PDN Gateway 172 and the BM-SC 170 are connected to the IP Services 176.
  • the IP Services 176 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS) , a PS Streaming Service, and/or other IP services.
  • the BM-SC 170 may provide functions for MBMS user service provisioning and delivery.
  • the BM-SC 170 may serve as an entry point for content provider MBMS transmission, may be used to authorize and initiate MBMS Bearer Services within a public land mobile network (PLMN) , and may be used to schedule MBMS transmissions.
  • PLMN public land mobile network
  • the MBMS Gateway 168 may be used to distribute MBMS traffic to the base stations 102 belonging to a Multicast Broadcast Single Frequency Network (MBSFN) area broadcasting a particular service, and may be responsible for session management (start/stop) and for collecting eMBMS related charging information.
  • MMSFN Multicast Broadcast Single Frequency Network
  • the core network 190 may include a Access and Mobility Management Function (AMF) 192, other AMFs 193, a location management function (LMF) 198, a Session Management Function (SMF) 194, and a User Plane Function (UPF) 195.
  • the AMF 192 may be in communication with a Unified Data Management (UDM) 196.
  • the AMF 192 is the control node that processes the signaling between the UEs 104 and the core network 190.
  • the SMF 194 provides QoS flow and session management. All user Internet protocol (IP) packets are transferred through the UPF 195.
  • the UPF 195 provides UE IP address allocation as well as other functions.
  • the UPF 195 is connected to the IP Services 197.
  • the IP Services 197 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS) , a PS Streaming Service, and/or other IP services.
  • IMS IP Multimedia Subsystem
  • the base station may also be referred to as a gNB, Node B, evolved Node B (eNB) , an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS) , an extended service set (ESS) , a transmit reception point (TRP) , or some other suitable terminology.
  • the base station 102 provides an access point to the EPC 160 or core network 190 for a UE 104.
  • Examples of UEs 104 include a cellular phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal digital assistant (PDA) , a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player) , a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor/actuator, a display, or any other similar functioning device.
  • SIP session initiation protocol
  • PDA personal digital assistant
  • the UEs 104 may be referred to as IoT devices (e.g., parking meter, gas pump, toaster, vehicles, heart monitor, etc. ) .
  • the UE 104 may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology.
  • NR 5G New Radio
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • CDMA Code Division Multiple Access
  • GSM Global System for Mobile communications
  • FIG. 2 is a block diagram of a base station 210 in communication with a UE 250 in an access network.
  • IP packets from the EPC 160 may be provided to a controller/processor 275.
  • the controller/processor 275 implements layer 3 and layer 2 functionality.
  • Layer 3 includes a radio resource control (RRC) layer
  • layer 2 includes a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • RLC radio link control
  • MAC medium access control
  • the controller/processor 275 provides RRC layer functionality associated with broadcasting of system information (e.g., MIB, SIBs) , RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release) , inter radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functionality associated with header compression /decompression, security (ciphering, deciphering, integrity protection, integrity verification) , and handover support functions; RLC layer functionality associated with the transfer of upper layer packet data units (PDUs) , error correction through ARQ, concatenation, segmentation, and reassembly of RLC service data units (SDUs) , re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs) , demultiplexing of MAC SDU
  • the transmit (TX) processor 216 and the receive (RX) processor 270 implement layer 1 functionality associated with various signal processing functions.
  • Layer 1 which includes a physical (PHY) layer, may include error detection on the transport channels, forward error correction (FEC) coding/decoding of the transport channels, interleaving, rate matching, mapping onto physical channels, modulation/demodulation of physical channels, and MIMO antenna processing.
  • the TX processor 216 handles mapping to signal constellations based on various modulation schemes (e.g., binary phase-shift keying (BPSK) , quadrature phase-shift keying (QPSK) , M-phase-shift keying (M-PSK) , M-quadrature amplitude modulation (M-QAM) ) .
  • BPSK binary phase-shift keying
  • QPSK quadrature phase-shift keying
  • M-PSK M-phase-shift keying
  • M-QAM M-quadrature amplitude modulation
  • the coded and modulated symbols may then be split into parallel streams.
  • Each stream may then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time and/or frequency domain, and then combined together using an Inverse Fast Fourier Transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream.
  • IFFT Inverse Fast Fourier Transform
  • the OFDM stream is spatially precoded to produce multiple spatial streams.
  • Channel estimates from a channel estimator 274 may be used to determine the coding and modulation scheme, as well as for spatial processing.
  • the channel estimate may be derived from a reference signal and/or channel condition feedback transmitted by the UE 250.
  • Each spatial stream may then be provided to a different antenna 220 via a separate transmitter 218TX.
  • Each transmitter 218TX may modulate an RF carrier with a respective spatial stream for transmission.
  • each receiver 254RX receives a signal through its respective antenna 252.
  • Each receiver 254RX recovers information modulated onto an RF carrier and provides the information to the receive (RX) processor 256.
  • the TX processor 268 and the RX processor 256 implement layer 1 functionality associated with various signal processing functions.
  • the RX processor 256 may perform spatial processing on the information to recover any spatial streams destined for the UE 250. If multiple spatial streams are destined for the UE 250, they may be combined by the RX processor 256 into a single OFDM symbol stream.
  • the RX processor 256 then converts the OFDM symbol stream from the time-domain to the frequency domain using a Fast Fourier Transform (FFT) .
  • FFT Fast Fourier Transform
  • the frequency domain signal comprises a separate OFDM symbol stream for each subcarrier of the OFDM signal.
  • the symbols on each subcarrier, and the reference signal are recovered and demodulated by determining the most likely signal constellation points transmitted by the base station 210. These soft decisions may be based on channel estimates computed by the channel estimator 258.
  • the soft decisions are then decoded and deinterleaved to recover the data and control signals that were originally transmitted by the base station 210 on the physical channel.
  • the data and control signals are then provided to the controller/processor 259, which implements layer 3 and layer 2 functionality.
  • the controller/processor 259 can be associated with a memory 260 that stores program codes and data.
  • the memory 260 may be referred to as a computer-readable medium.
  • the controller/processor 259 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, and control signal processing to recover IP packets from the EPC 160.
  • the controller/processor 259 is also responsible for error detection using an ACK and/or NACK protocol to support HARQ operations.
  • the controller/processor 259 provides RRC layer functionality associated with system information (e.g., MIB, SIBs) acquisition, RRC connections, and measurement reporting; PDCP layer functionality associated with header compression /decompression, and security (ciphering, deciphering, integrity protection, integrity verification) ; RLC layer functionality associated with the transfer of upper layer PDUs, error correction through ARQ, concatenation, segmentation, and reassembly of RLC SDUs, re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.
  • RRC layer functionality associated with system information (e.g., MIB, SIBs) acquisition, RRC connections, and measurement reporting
  • PDCP layer functionality associated with
  • Channel estimates derived by a channel estimator 258 from a reference signal or feedback transmitted by the base station 210 may be used by the TX processor 268 to select the appropriate coding and modulation schemes, and to facilitate spatial processing.
  • the spatial streams generated by the TX processor 268 may be provided to different antenna 252 via separate transmitters 254TX. Each transmitter 254TX may modulate an RF carrier with a respective spatial stream for transmission.
  • the UL transmission is processed at the base station 210 in a manner similar to that described in connection with the receiver function at the UE 250.
  • Each receiver 218RX receives a signal through its respective antenna 220.
  • Each receiver 218RX recovers information modulated onto an RF carrier and provides the information to a RX processor 270.
  • the controller/processor 275 can be associated with a memory 276 that stores program codes and data.
  • the memory 276 may be referred to as a computer-readable medium.
  • the controller/processor 275 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover IP packets from the UE 250. IP packets from the controller/processor 275 may be provided to the EPC 160.
  • the controller/processor 275 is also responsible for error detection using an ACK and/or NACK protocol to support HARQ operations.
  • New radio may refer to radios configured to operate according to a new air interface (e.g., other than Orthogonal Frequency Divisional Multiple Access (OFDMA) -based air interfaces) or fixed transport layer (e.g., other than Internet Protocol (IP) ) .
  • NR may utilize OFDM with a cyclic prefix (CP) on the uplink and downlink and may include support for half-duplex operation using time division duplexing (TDD) .
  • NR may include Enhanced Mobile Broadband (eMBB) service targeting wide bandwidth (e.g. 80 MHz beyond) , millimeter wave (mmW) targeting high carrier frequency (e.g. 60 GHz) , massive MTC (mMTC) targeting non-backward compatible MTC techniques, and/or mission critical targeting ultra-reliable low latency communications (URLLC) service.
  • eMBB Enhanced Mobile Broadband
  • mmW millimeter wave
  • mMTC massive MTC
  • URLLC ultra-reliable low latency communications
  • NR resource blocks may span 12 sub-carriers with a sub-carrier bandwidth of 60 kHz over a 0.25 ms duration or a bandwidth of 30 kHz over a 0.5 ms duration (similarly, 50MHz BW for 15kHz SCS over a 1 ms duration) .
  • Each radio frame may consist of 10 subframes (10, 20, 40 or 80 NR slots) with a length of 10 ms.
  • Each slot may indicate a link direction (i.e., DL or UL) for data transmission and the link direction for each slot may be dynamically switched.
  • Each slot may include DL/UL data as well as DL/UL control data.
  • UL and DL slots for NR may be as described in more detail below with respect to FIGs. 5 and 6.
  • the NR RAN may include a central unit (CU) and distributed units (DUs) .
  • a NR BS e.g., gNB, 5G Node B, Node B, transmission reception point (TRP) , access point (AP)
  • NR cells can be configured as access cells (ACells) or data only cells (DCells) .
  • the RAN e.g., a central unit or distributed unit
  • DCells may be cells used for carrier aggregation or dual connectivity and may not be used for initial access, cell selection/reselection, or handover.
  • DCells may not transmit synchronization signals (SS) in some cases DCells may transmit SS.
  • SS synchronization signals
  • NR BSs may transmit downlink signals to UEs indicating the cell type. Based on the cell type indication, the UE may communicate with the NR BS. For example, the UE may determine NR BSs to consider for cell selection, access, handover, and/or measurement based on the indicated cell type.
  • FIG. 3 illustrates an example logical architecture of a distributed RAN 300, according to aspects of the present disclosure.
  • a 5G access node 306 may include an access node controller (ANC) 302.
  • the ANC may be a central unit (CU) of the distributed RAN.
  • the backhaul interface to the next generation core network (NG-CN) 304 may terminate at the ANC.
  • the backhaul interface to neighboring next generation access nodes (NG-ANs) 310 may terminate at the ANC.
  • the ANC may include one or more TRPs 308 (which may also be referred to as BSs, NR BSs, Node Bs, 5G NBs, APs, or some other term) .
  • TRPs 308 which may also be referred to as BSs, NR BSs, Node Bs, 5G NBs, APs, or some other term.
  • TRP may be used interchangeably with “cell. ”
  • the TRPs 308 may be a distributed unit (DU) .
  • the TRPs may be connected to one ANC (ANC 302) or more than one ANC (not illustrated) .
  • ANC 302 ANC 302
  • RaaS radio as a service
  • a TRP may include one or more antenna ports.
  • the TRPs may be configured to individually (e.g., dynamic selection) or jointly (e.g., joint transmission) serve traffic to a UE.
  • the local architecture of the distributed RAN 300 may be used to illustrate fronthaul definition.
  • the architecture may be defined that support fronthauling solutions across different deployment types.
  • the architecture may be based on transmit network capabilities (e.g., bandwidth, latency, and/or jitter) .
  • the architecture may share features and/or components with LTE.
  • the next generation AN (NG-AN) 310 may support dual connectivity with NR.
  • the NG-AN may share a common fronthaul for LTE and NR.
  • the architecture may enable cooperation between and among TRPs 308. For example, cooperation may be preset within a TRP and/or across TRPs via the ANC 302. According to aspects, no inter-TRP interface may be needed/present.
  • a dynamic configuration of split logical functions may be present within the architecture of the distributed RAN 300.
  • the PDCP, RLC, MAC protocol may be adaptably placed at the ANC or TRP.
  • FIG. 4 illustrates an example physical architecture of a distributed RAN 400, according to aspects of the present disclosure.
  • a centralized core network unit (C-CU) 402 may host core network functions.
  • the C-CU may be centrally deployed.
  • C-CU functionality may be offloaded (e.g., to advanced wireless services (AWS) ) , in an effort to handle peak capacity.
  • a centralized RAN unit (C-RU) 404 may host one or more ANC functions.
  • the C-RU may host core network functions locally.
  • the C-RU may have distributed deployment.
  • the C-RU may be closer to the network edge.
  • a distributed unit (DU) 406 may host one or more TRPs.
  • the DU may be located at edges of the network with radio frequency (RF) functionality.
  • RF radio frequency
  • FIG. 5 is a diagram 500 showing an example of a DL-centric slot.
  • the DL-centric slot may include a control portion 502.
  • the control portion 502 may exist in the initial or beginning portion of the DL-centric slot.
  • the control portion 502 may include various scheduling information and/or control information corresponding to various portions of the DL-centric slot.
  • the control portion 502 may be a physical DL control channel (PDCCH) , as indicated in FIG. 5.
  • the DL-centric slot may also include a DL data portion 504.
  • the DL data portion 504 may sometimes be referred to as the payload of the DL-centric slot.
  • the DL data portion 504 may include the communication resources utilized to communicate DL data from the scheduling entity (e.g., UE or BS) to the subordinate entity (e.g., UE) .
  • the DL data portion 504 may be a physical DL shared channel (PDSCH) .
  • PDSCH physical DL shared channel
  • the DL-centric slot may also include a common UL portion 506.
  • the common UL portion 506 may sometimes be referred to as an UL burst, a common UL burst, and/or various other suitable terms.
  • the common UL portion 506 may include feedback information corresponding to various other portions of the DL-centric slot.
  • the common UL portion 506 may include feedback information corresponding to the control portion 502.
  • Non-limiting examples of feedback information may include an ACK signal, a NACK signal, a HARQ indicator, and/or various other suitable types of information.
  • the common UL portion 506 may include additional or alternative information, such as information pertaining to random access channel (RACH) procedures, scheduling requests (SRs) , and various other suitable types of information.
  • RACH random access channel
  • SRs scheduling requests
  • the end of the DL data portion 504 may be separated in time from the beginning of the common UL portion 506.
  • This time separation may sometimes be referred to as a gap, a guard period, a guard interval, and/or various other suitable terms.
  • This separation provides time for the switch-over from DL communication (e.g., reception operation by the subordinate entity (e.g., UE) ) to UL communication (e.g., transmission by the subordinate entity (e.g., UE) ) .
  • DL communication e.g., reception operation by the subordinate entity (e.g., UE)
  • UL communication e.g., transmission by the subordinate entity (e.g., UE)
  • FIG. 6 is a diagram 600 showing an example of an UL-centric slot.
  • the UL-centric slot may include a control portion 602.
  • the control portion 602 may exist in the initial or beginning portion of the UL-centric slot.
  • the control portion 602 in FIG. 6 may be similar to the control portion 502 described above with reference to FIG. 5.
  • the UL-centric slot may also include an UL data portion 604.
  • the UL data portion 604 may sometimes be referred to as the pay load of the UL-centric slot.
  • the UL portion may refer to the communication resources utilized to communicate UL data from the subordinate entity (e.g., UE) to the scheduling entity (e.g., UE or BS) .
  • the control portion 602 may be a physical DL control channel (PDCCH) .
  • PDCCH physical DL control channel
  • the end of the control portion 602 may be separated in time from the beginning of the UL data portion 604. This time separation may sometimes be referred to as a gap, guard period, guard interval, and/or various other suitable terms. This separation provides time for the switch-over from DL communication (e.g., reception operation by the scheduling entity) to UL communication (e.g., transmission by the scheduling entity) .
  • the UL-centric slot may also include a common UL portion 606.
  • the common UL portion 606 in FIG. 6 may be similar to the common UL portion 506 described above with reference to FIG. 5.
  • the common UL portion 606 may additionally or alternatively include information pertaining to channel quality indicator (CQI) , sounding reference signals (SRSs) , and various other suitable types of information.
  • CQI channel quality indicator
  • SRSs sounding reference signals
  • One of ordinary skill in the art will understand that the foregoing is merely one example of an UL-centric slot and alternative structures having similar features may exist without necessarily deviating from the aspects described herein.
  • two or more subordinate entities may communicate with each other using sidelink signals.
  • Real-world applications of such sidelink communications may include public safety, proximity services, UE-to-network relaying, vehicle-to-vehicle (V2V) communications, Internet of Everything (IoE) communications, IoT communications, mission-critical mesh, and/or various other suitable applications.
  • a sidelink signal may refer to a signal communicated from one subordinate entity (e.g., UE1) to another subordinate entity (e.g., UE2) without relaying that communication through the scheduling entity (e.g., UE or BS) , even though the scheduling entity may be utilized for scheduling and/or control purposes.
  • the sidelink signals may be communicated using a licensed spectrum (unlike wireless local area networks, which typically use an unlicensed spectrum) .
  • FIG. 7 is a diagram 700 illustrating a wireless communication system that supports Public Land Mobile Network (PLMN) selection in a 5G network.
  • PLMN Public Land Mobile Network
  • UE user equipment
  • AMF access and mobility management function
  • the UE 704 is in wireless communication with a base station 722, which is connected to a second core network 720 supporting PLMN B.
  • the second core network 720 includes an AMF 724, among other components.
  • the UE 704 may perform PLMN selection to prioritize and connect to a high-priority PLMN.
  • a timer e.g., Periodic PLMN Search Timer T as specified in relevant sections of the 3GPP standards, such as TS 23.122
  • T Periodic PLMN Search Timer
  • the UE 704 scans for available PLMNs and selects the highest-priority PLMN based on stored preferences or Steering of Roaming (SOR) information received during registration.
  • SOR Steering of Roaming
  • the UE 704 if the UE 704 is camped on a Visited PLMN (VPLMN) , such as PLMN A, it periodically searches for higher-priority PLMNs, including the Home Public Land Mobile Network (HPLMN) or Equivalent Home Public Land Mobile Network (EHPLMN) , using Timer T.
  • PLMN Visited PLMN
  • HPLMN Home Public Land Mobile Network
  • EHPLMN Equivalent Home Public Land Mobile Network
  • the UE 704 Upon detecting a higher-priority PLMN (e.g., PLMN B) , the UE 704 initiates a deregistration procedure (e.g., Deregistration Procedure 734) to release current sessions and transition to Idle Mode. Subsequently, the UE 704 attempts to register on the higher-priority PLMN B.
  • a deregistration procedure e.g., Deregistration Procedure 734
  • the UE 704 sends a Registration Request to the base station 702, which forwards the request to the AMF 714 in the network 710.
  • the Registration Request may include the UE identity, capabilities, and the selected PLMN.
  • the AMF 714 performs authentication and establishes security keys with the UE 704.
  • the AMF 714 sends a Registration Accept message to the UE 704 via the base station 702.
  • the Registration Accept message may include network configuration, allowed services, and optionally SOR information for PLMN selection.
  • the network 710 when the UE 704 performs the registration procedure with the network 710, the network 710 includes SOR information in the Registration Accept message.
  • This information contained within the SOR container of the Registration Accept message, includes data such as operator-controlled PLMNs and SOR timers.
  • SOR information may guide the UE 704 in selecting an appropriate PLMN during roaming. For example, when the UE 704 registers on the PLMN A that has adopted operator-controlled PLMNs from the HPLMN, the PLMN A provides SOR information to the UE 704. The UE 704 can then use the operator-controlled PLMN for the PLMN selection procedure.
  • the network can indicate that the UE should use a specific PLMN for 4G or other technologies. This is referred to as an operator-controlled PLMN.
  • the conditions under which the UE performs the deregistration procedure including the use of SOR timers (e.g., the Tsor timer) , are detailed in the 3GPP specifications, such as TS 23.122, specifically Annex C. These conditions dictate when the UE should initiate the deregistration procedure.
  • SOR timers e.g., the Tsor timer
  • the deregistration procedure (e.g., Deregistration Procedure 734) may be initiated by either the UE 704 or the network 710 due to inactivity, higher-priority PLMN detection, or network policies. If initiated by the UE 704, the UE sends a Deregistration Request to the base station 702, which forwards the request to the AMF 714. If initiated by the network 710, the AMF 714 sends a Deregistration Request to the UE 704 via the base station 702. The UE 704 confirms deregistration by sending a Deregistration Accept message to the AMF 714 via the base station 702. Upon completion of the deregistration procedure, all active PDU sessions and services are released, and the UE 704 transitions to Idle Mode.
  • Deregistration Procedure 734 may be initiated by either the UE 704 or the network 710 due to inactivity, higher-priority PLMN detection, or network policies. If initiated by the UE 704, the UE sends a Deregistration Request to the base station 70
  • the UE 704 may attempt to obtain service on a higher-priority PLMN or Standalone Non-Public Network (SNPN) , by using timer T.
  • the timer T controls periodic searches to obtain service from the HPLMN, EHPLMN, or high-priority PLMN.
  • the UE 704 may then transition to the connected mode.
  • SNPN Standalone Non-Public Network
  • the transition of the UE from the idle mode to the connected mode may be triggered under the following conditions: (1) the UE detects a higher-priority PLMN and attempts to switch to the target PLMN; (2) the UE performs a periodic PLMN search based on Timer T and detects a higher-priority PLMN; or (3) the UE receives SOR information and decides to switch to a higher-priority PLMN.
  • the UE establishes an RRC connection with the base station through a random access procedure and transitions to the connected mode for service transmission or PLMN switching.
  • the SOR in Connected Mode timer (Tsor-cm) is designed to prevent the UE from remaining in connected mode for an extended period. Specifically, this timer ensures that the PDU session remains active only for a predefined duration during steering of roaming in connected mode.
  • the Tsor-cm timer ensures that the UE does not maintain the PDU session for an excessive duration.
  • the PDU session remains active only while the timer is running. When the timer stops or expires, the PDU session is released.
  • the UE may perform the deregistration procedure under the following conditions: (1) No Tsor-cm timer is running for any PDU session or service; (2) The last running Tsor-cm timer is stopped due to the release of the associated PDU session or other conditions (e.g., UE state transition) ; or (3) The Tsor-cm timer expires.
  • the deregistration procedure may be performed.
  • the UE 704 acts as if Timer T, which controls periodic attempts to search for higher-priority networks, has expired. This triggers the UE 704 to initiate a search for available PLMNs or SNPNs and attempt registration on a higher-priority network if detected.
  • the UE may be configured with N1 mode capability for 3GPP access, enabling communication with the core network via an N1 reference point.
  • the N1 reference point such as the N1 reference point 716, serves as a logical interface between the UE 704 and the AMF 714 for transmitting Non-Access Stratum (NAS) signaling.
  • NAS Non-Access Stratum
  • the N1 interface 716 supports direct signaling transmission for procedures such as registration, deregistration, and PLMN selection. Although the N1 interface 716 is a logical entity, its physical transmission is facilitated through the base station 702, which encapsulates NAS messages within Radio Resource Control (RRC) messages.
  • RRC Radio Resource Control
  • the UE 704 may perform an NAS procedure for communicating with the network 710 through the N1 reference point 716.
  • a message transmitted from the network 710 to the UE 704 may be referred to as a downlink (DL) NAS transport message
  • a message transmitted from the UE 704 to the network 710 may be referred to as an uplink (UL) NAS transport message.
  • DL downlink
  • UL uplink
  • the UE 704 may include a PDU session establishment request in a 5G System Session Management (5GSM) message.
  • the 5GSM message is encapsulated into a 5G System Mobility Management (5GMM) message and transmitted to the AMF 714 in an NAS transport procedure across the N1 reference point 716.
  • 5GSM 5G System Session Management
  • 5GMM 5G System Mobility Management
  • the N1 mode capability for 3GPP access shall be disabled. This ensures compatibility with legacy network modes and prevents conflicts in network access procedures.
  • a UE-initiated deregistration procedure may disable the N1 mode capability of the UE.
  • the disabling of the N1 mode capability is performed as part of the deregistration procedure, and the UE will not re-enable the N1 mode capability if it is already disabled.
  • the UE 704 may re-enable the N1 mode capability for the current PLMN selection. This re-enabling process allows the UE 704 to resume 5G services when appropriate conditions are met.
  • a specific clause addresses scenarios where the UE, while in 5G connected mode, determines to obtain service on a higher priority PLMN due to SOR. Based on the conditions specified in Annex C of TS 23.122, the UE shall execute a UE-initiated deregistration procedure.
  • the deregistration procedure is triggered by the UE. For instance, when a UE-initiated deregistration procedure is triggered due to the expiration or stopping of the Tsor-cm timer, the UE disables the N1 mode capability for 3GPP access. As a result, the UE is unable to perform periodic PLMN searches, and the high-priority PLMN search is thus delayed.
  • the UE may determine whether a UE-initiated deregistration procedure is related to a specific timer after the deregistration has occurred. For example, if the UE-initiated deregistration procedure is performed due to the expiration or stopping of the Tsor-cm timer, which can interfere with enabling of the N1 mode capability, the UE (e.g., UE 704) may re-enable the N1 mode capability for 3GPP access. Alternatively, the UE may refrain from disabling the N1 mode capability in such scenarios. In other words, the UE may deactivate the disabling of the N1 mode capability, thereby avoiding the disabling of the N1 mode capability.
  • the UE may determine whether a UE-initiated deregistration procedure is related to a specific timer after the deregistration has occurred. For example, if the UE-initiated deregistration procedure is performed due to the expiration or stopping of the Tsor-cm timer, which can interfere with enabling of
  • the UE may maintain the enabling of the N1 mode capability. This ensures that the UE continues to support communication with the 5G core network via the N1 interface, even in scenarios where the Tsor-cm timer would otherwise disable the N1 mode capability.
  • the N1 mode capability for 3GPP access is disabled.
  • This re-enabling may occur, for example, during PLMN selection, SNPN selection, or SNPN selection for onboarding services over 3GPP access.
  • the re-enabling of the N1 mode capability ensures seamless service continuity during critical procedures such as PLMN selection, SNPN selection, or onboarding services, thereby enhancing the quality of experience for the user.
  • the ability to re-enable the N1 mode capability during PLMN or SNPN selection also allows the UE to connect to the most suitable network, leading to improved network performance and reliability.
  • the UE may refrain from disabling the N1 mode capability initially. This approach prevents the UE from disabling the N1 mode capability under these specific circumstances.
  • the UE avoids unnecessary toggling of the N1 mode capability and conserves network resources that would otherwise be expended in re-enabling the N1 mode capability at a later stage. This reduces signaling overhead and improves operational efficiency.
  • the UE determines whether the deregistration was triggered by the Tsor-cm timer. This determination may be made after the deregistration procedure is completed.
  • the configuration provides options for either re-enabling the N1 mode capability or avoiding its disabling.
  • the UE shall re-enable the N1 mode capability for 3GPP access under the following conditions: (1) The UE attempts to obtain service on a higher-priority PLMN or SNPN, as specified in clause 4.4.3.3 of TS 23.122; and (2) The UE acts as if Timer T (which controls periodic attempts) has expired due to expiration or stopping of Tsor-cm timer.
  • the UE emulates the expiration of timer T, based on the expiration or stopping of the Tsor-cm timer, and thereby enables the N1 mode capability for 3GPP access again.
  • Single-registration mode refers to an operational mode in which the UE maintains a single registration context for both 3GPP and non-3GPP access types. In this mode, the UE registers with the 5G core network (5GC) through either 3GPP access or non-3GPP access, but not both simultaneously.
  • the single-registration mode simplifies the registration management process by reducing the number of registration contexts maintained by the UE and the network, thereby minimizing signaling overhead and improving resource efficiency.
  • the A/Gb mode refers to an operational mode in which the UE connects to the core network via the GSM EDGE Radio Access Network (GERAN) using the A or Gb interface, as defined in 3GPP technical specifications.
  • the A interface is utilized for circuit-switched (CS) services, while the Gb interface is utilized for packet-switched (PS) services.
  • the A/Gb mode enables the UE to support legacy GSM and GPRS/EDGE services.
  • the Iu mode refers to an operational mode in which the UE connects to the core network via the UMTS Terrestrial Radio Access Network (UTRAN) using the Iu interface, as defined in 3GPP technical specifications.
  • the Iu interface supports both circuit-switched (CS) and packet-switched (PS) services, enabling the UE to operate in UMTS networks.
  • CS circuit-switched
  • PS packet-switched
  • the Iu mode facilitates seamless integration with 3GPP-compliant networks and supports advanced services such as voice over IP (VoIP) and high-speed data transmission.
  • VoIP voice over IP
  • the deregistration is triggered by the expiration or stopping of the Tsor-cm timer, it generally indicates that the UE may have temporarily lost network connectivity or entered an inactive state.
  • maintaining the N1 mode capability ensures that the UE can promptly restore 5G services, thereby minimizing service interruption time.
  • This configuration allows the UE to retain the N1 mode capability for 5G networks while simultaneously supporting A/Gb mode or Iu mode. This capability is particularly critical for multi-mode UEs (capable of supporting 2G, 3G, 4G, and 5G networks) , as it facilitates seamless transitions between traditional networks and 5G networks without the need for frequent enabling or disabling of the N1 mode capability.
  • the UE may retain the N1 mode capability to support efficient PLMN selection. This ensures that the UE continues to support communication with the 5G core network via the N1 interface, thereby enabling streamlined and uninterrupted PLMN selection procedures.
  • the UE avoids unnecessary service interruptions and ensures that higher-priority PLMNs can be detected and selected without delay. This approach enhances the UE's ability to prioritize network connectivity and optimize roaming behavior in accordance with operator policies and user preferences.
  • FIG. 8 is a flow chart 800 of a method for handling high priority PLMN selection execution after de-registration procedure.
  • the method may be performed by a UE (e.g., the UE 704) .
  • the UE identifies occurrence of deregistration initiated by the UE.
  • the UE determines whether the deregistration is related to a timer that interferes with enabling of N1 mode capability of the UE.
  • the UE in response to the deregistration being related to the timer, the UE maintains the enabling of the N1 mode capability of the UE.
  • maintaining the enabling of the N1 mode capability of the UE may include: deactivating disabling of the N1 mode capability of the UE. In other configurations, maintaining the enabling of the N1 mode capability of the UE may include: re-enabling the N1 mode capability of the UE.
  • the timer may include a Steering of Roaming (SOR) in Connected Mode timer (Tsor-cm) .
  • determining whether the deregistration is related to the timer may include: determining whether the deregistration is triggered by expiration or stopping of the Tsor-cm.
  • the UE may deactivate the disabling of the N1 mode capability for 3GPP access.
  • the deregistration may activate selection of a Public Land Mobile Network (PLMN) , selection of a Standalone Non-Public Network (SNPN) , or selection of a SNPN for onboarding services over 3GPP access.
  • PLMN Public Land Mobile Network
  • SNPN Standalone Non-Public Network
  • the UE when disabling of the N1 mode capability for 3GPP access is triggered by the deregistration for 3GPP access or for both 3GPP access and non-3GPP access and the UE operates in a single-registration mode, and when the UE attempts to obtain service on a higher priority Public Land Mobile Network (PLMN) , or a Standalone Non-Public Network (SNPN) , the UE may enable the N1 mode capability for 3GPP access.
  • PLMN Public Land Mobile Network
  • SNPN Standalone Non-Public Network
  • the determining may be made after the deregistration is completed.
  • Combinations such as “at least one of A, B, or C, ” “one or more of A, B, or C, ” “at least one of A, B, and C, ” “one or more of A, B, and C, ” and “A, B, C, or any combination thereof” include any combination of A, B, and/or C, and may include multiples of A, multiples of B, or multiples of C.
  • combinations such as “at least one of A, B, or C, ” “one or more of A, B, or C, ” “at least one of A, B, and C, ” “one or more of A, B, and C, ” and “A, B, C, or any combination thereof” may be A only, B only, C only, A and B, A and C, B and C, or A and B and C, where any such combinations may contain one or more member or members of A, B, or C.

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Abstract

La présente divulgation concerne, selon un aspect, un procédé, un support lisible par ordinateur, et un appareil. Le procédé peut être mis en œuvre par un UE. L'UE identifie l'apparition d'un désenregistrement initié par l'UE. L'UE détermine si le désenregistrement est associé à un temporisateur qui interfère avec l'activation de la capacité de mode N1 de l'UE. En réponse au fait que le désenregistrement est lié au temporisateur, l'UE maintient l'activation de la capacité de mode N1 de l'UE.
PCT/CN2025/077357 2024-03-13 2025-02-14 Amélioration d'exécution de sélection de plmn à haute priorité après une procédure de désenregistrement Pending WO2025190034A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210321477A1 (en) * 2020-04-09 2021-10-14 Mediatek Singapore Pte. Ltd. Protocol Improvement For Redirection To Another System In Mobile Communications
CN113543248A (zh) * 2020-04-17 2021-10-22 三星电子株式会社 用于管理接入网络切片的注册失败的方法和用户设备
EP4185067A1 (fr) * 2020-07-15 2023-05-24 Samsung Electronics Co., Ltd. Dispositif électronique prenant en charge plusieurs schémas de communication et son procédé de fonctionnement
CN116582898A (zh) * 2022-02-09 2023-08-11 联发科技股份有限公司 在系统间切换后处理会话管理定时器的方法
CN117121520A (zh) * 2021-04-08 2023-11-24 三星电子株式会社 用于在无线通信系统中在小区改变期间支持sor-cmci配置的方法和装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210321477A1 (en) * 2020-04-09 2021-10-14 Mediatek Singapore Pte. Ltd. Protocol Improvement For Redirection To Another System In Mobile Communications
CN113543248A (zh) * 2020-04-17 2021-10-22 三星电子株式会社 用于管理接入网络切片的注册失败的方法和用户设备
EP4185067A1 (fr) * 2020-07-15 2023-05-24 Samsung Electronics Co., Ltd. Dispositif électronique prenant en charge plusieurs schémas de communication et son procédé de fonctionnement
CN117121520A (zh) * 2021-04-08 2023-11-24 三星电子株式会社 用于在无线通信系统中在小区改变期间支持sor-cmci配置的方法和装置
CN116582898A (zh) * 2022-02-09 2023-08-11 联发科技股份有限公司 在系统间切换后处理会话管理定时器的方法

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