WO2021226832A1 - Resélection de station de base pour de multiples services d'un équipement utilisateur - Google Patents

Resélection de station de base pour de multiples services d'un équipement utilisateur Download PDF

Info

Publication number
WO2021226832A1
WO2021226832A1 PCT/CN2020/089813 CN2020089813W WO2021226832A1 WO 2021226832 A1 WO2021226832 A1 WO 2021226832A1 CN 2020089813 W CN2020089813 W CN 2020089813W WO 2021226832 A1 WO2021226832 A1 WO 2021226832A1
Authority
WO
WIPO (PCT)
Prior art keywords
base station
service
mac
message
control information
Prior art date
Application number
PCT/CN2020/089813
Other languages
English (en)
Inventor
Tianya LIN
Hao Zhang
Original Assignee
Qualcomm Incorporated
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 Qualcomm Incorporated filed Critical Qualcomm Incorporated
Priority to PCT/CN2020/089813 priority Critical patent/WO2021226832A1/fr
Publication of WO2021226832A1 publication Critical patent/WO2021226832A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point

Definitions

  • aspects of the present disclosure relate generally to wireless communication systems, and more particularly, to base station reselection for a multi-service user equipment (UE) in a wireless communication system.
  • UE multi-service user equipment
  • Wireless communication networks are widely deployed to provide various communication services such as voice, video, packet data, messaging, broadcast, and the like. These wireless networks may be multiple-access networks capable of supporting multiple users by sharing the available network resources. Such networks, which are usually multiple access networks, support communications for multiple users by sharing the available network resources.
  • a wireless communication network may include a number of base stations or node Bs that can support communication for a number of user equipments (UEs) .
  • a UE may communicate with a base station via downlink and uplink.
  • the downlink (or forward link) refers to the communication link from the base station to the UE
  • the uplink (or reverse link) refers to the communication link from the UE to the base station.
  • a base station may transmit data and control information on the downlink to a UE and/or may receive data and control information on the uplink from the UE.
  • a transmission from the base station may encounter interference due to transmissions from neighbor base stations or from other wireless radio frequency (RF) transmitters.
  • RF radio frequency
  • a transmission from the UE may encounter interference from uplink transmissions of other UEs communicating with the neighbor base stations or from other wireless RF transmitters. This interference may degrade performance on both the downlink and uplink.
  • a method of wireless communication includes receiving a message by a user equipment (UE) during operation of the UE based on a first service associated with the UE.
  • the message indicates a first message authentication code for integrity (MAC-I) and further indicates a first base station as a source of the message.
  • the method further includes, in response to detecting that the first MAC-I differs from a second MAC-I determined by the UE, updating first control information associated with the first service to indicate the source of the message.
  • the method further includes, based at least in part on the first control information, selecting a second base station for camping by the first service.
  • the method further includes updating second control information associated with a second service associated with the UE based on an indication of the source of the message.
  • an apparatus incudes a memory and one or more processors coupled to the memory.
  • the one or more processors are configured to receive a message during operation of a UE based on a first service associated with the UE.
  • the message indicates a first MAC-I and further indicates a first base station as a source of the message.
  • the one or more processors are further configured to update, in response to detecting that the first MAC-I differs from a second MAC-I determined by the UE, first control information associated with the first service to indicate the source of the message.
  • the one or more processors are further configured to select a second base station for camping by the first service based at least in part on the first control information.
  • the one or more processors are further configured to update second control information associated with a second service associated with the UE based on an indication of the source of the message.
  • an apparatus includes means for receiving a message during operation of a UE based on a first service associated with the UE.
  • the message indicates a first MAC-I and further indicates a first base station as a source of the message.
  • the apparatus further includes means for updating first control information associated with the first service to indicate the source of the message in response to detecting that the first MAC-I differs from a second MAC-I determined by the UE.
  • the apparatus further includes means for selecting a second base station for camping by the first service based at least in part on the first control information and means for updating second control information associated with a second service associated with the UE based on an indication of the source of the message.
  • a non-transitory computer-readable medium stores instructions executable by a processor to perform operations.
  • the operations include receiving a message by a UE during operation of the UE based on a first service associated with the UE.
  • the message indicates a first MAC-I and further indicates a first base station as a source of the message.
  • the operations further include, in response to detecting that the first MAC-I differs from a second MAC-I determined by the UE, updating first control information associated with the first service to indicate the source of the message.
  • the operations further include selecting a second base station for camping by the first service and updating second control information associated with a second service associated with the UE based on an indication of the source of the message.
  • FIG. 1 is a block diagram illustrating details of a wireless communication system including a user equipment (UE) device configured to perform base station reselection for multiple services in response to detection of a message authentication code for integrity (MAC-I) mismatch condition according to some aspects of the disclosure.
  • UE user equipment
  • MAC-I message authentication code for integrity
  • FIG. 2 is a block diagram conceptually illustrating a design of a base station and a UE configured to perform base station reselection for multiple services in response to detection of a MAC-I mismatch condition according to some aspects of the disclosure.
  • FIG. 3 is a block diagram illustrating details of a wireless communication system including a UE configured to perform base station reselection for multiple services in response to detection of a MAC-I mismatch condition according to some aspects of the disclosure.
  • FIG. 4A is ladder diagram illustrating operations that may be performed within a wireless communication system including a UE configured to perform base station reselection for multiple services in response to detection of a MAC-I mismatch condition according to some aspects of the disclosure.
  • FIG. 4B is another ladder diagram illustrating operations that may be performed within a wireless communication system including a UE configured to perform base station reselection for multiple services in response to detection of a MAC-I mismatch condition according to some aspects of the disclosure.
  • FIG. 5 is a flow chart illustrating an example of a method of wireless communication performed by a UE to perform base station reselection for multiple services in response to detection of a MAC-I mismatch condition according to some aspects of the disclosure.
  • FIG. 6 is a block diagram illustrating an example of a UE to perform base station reselection for multiple services in response to detection of a MAC-I mismatch condition according to some aspects of the disclosure.
  • Certain wireless communication protocols may specify a message code for authentication integrity (MAC-I) verification procedure.
  • a user equipment (UE) device may receive a first MAC-I from a base station and may compare the first MAC-I to a second MAC-I computed by the UE. If the first MAC-I corresponds to the second MAC-I, the UE may detect a MAC-I match condition and may continue communications with the base station.
  • MAC-I message code for authentication integrity
  • the first MAC-I may fail to correspond to the second MAC-I.
  • the UE may reattempt the MAC-I verification procedure (e.g., by repeating the MAC-I verification procedure four additional times) . If repeating the MAC-I verification procedure fails to result in a MAC-I match, the MAC-I verification procedure may “time out. ”
  • a wireless communication protocol may specify that the UE is to “fall back” to another device in response to the timing out of the MAC-I verification procedure, such as by initiating communications with a device having reduced capabilities, such as a second generation (2G) base station or a third generation (3G) base station.
  • Failure of the MAC-I verification procedure may be associated with decreased performance in a wireless communication network. For example, performing and repeating the MAC-I verification procedure may take a relatively long period of time, such as approximately two minutes. During this time, the UE may be in an out-of-service (OOS) state. Further, “falling back” to another device may decrease a data rate available to the UE or other capabilities.
  • OOS out-of-service
  • failure of the MAC-I verification procedure may be associated with certain security vulnerabilities.
  • a message may include an incorrect MAC-I due to a malicious entity, such as a hacker, attempting to gain authorized access to a network or a device (e.g., by causing the UE to initiate communications with a 2G or 3G base station that is associated with increased vulnerability or decreased security in some cases) .
  • a UE has a multiple subscriber identity module (SIM) configuration associated with multiple services, such as a first service associated with a first SIM and a second service associated with a second SIM.
  • SIM subscriber identity module
  • the UE may perform operations associated with the first service to decrease or avoid delays and service interruptions due to a MAC-I mismatch condition.
  • the UE may maintain first control information associated with the first service, such as a first list of “barred” cells that are associated with MAC-I mismatch conditions.
  • the UE may add an indication of the first base station to the first control information.
  • the UE may select a second base station for camping based at least in part on the first control information, such as by determining that the first list of barred cells does not include an indication of the second base station.
  • the UE may “share” information related to the operations with one or more other services, such as the second service, to decrease or avoid delays and service interruptions that may occur due to another MAC-I mismatch condition.
  • the first SIM may provide an indication of the first base station to the second SIM.
  • the UE may avoid communication with the first base station in response to the indication (e.g., to avoid repeating the MAC-I mismatch condition detected during operation based on the first service) , such as by selecting the second base station for camping by the second service.
  • the UE may perform one or more attempts to establish a MAC-I match between the second service and the first base station prior to selecting the second base station for camping by the second service.
  • the UE may reduce or avoid an OOS state associated with techniques that repeat a MAC-I verification procedure.
  • the UE may remain connected to a base station associated with a more recent wireless communication protocol, such as a fourth generation (4G) or a fifth generation (5G) wireless communication protocol (e.g., instead of “falling back” to a 2G or 3G cell) .
  • 4G fourth generation
  • 5G fifth generation
  • a base station that operates in accordance with a more recent wireless communication protocol may be associated with faster data rates and increased security as compared to a base station that operates in accordance with a less recent wireless communication protocol. Accordingly, performance and security may be enhanced. Further, cell reselection information can be provided by the first service to the second service, which may reduce or avoid instances of an OOS state with respect to the second service and which may enable faster reselection to a second base station.
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal FDMA
  • SC-FDMA single-carrier FDMA
  • LTE long-term evolution
  • GSM global system for mobile communications
  • 5G 5th Generation
  • NR new radio
  • a CDMA network may implement a radio technology such as universal terrestrial radio access (UTRA) , cdma2000, and the like.
  • UTRA includes wideband-CDMA (W-CDMA) and low chip rate (LCR) .
  • CDMA2000 covers IS-2000, IS-95, and IS-856 standards.
  • a TDMA network may, for example implement a radio technology such as GSM.
  • 3GPP defines standards for the GSM EDGE (enhanced data rates for GSM evolution) radio access network (RAN) , also denoted as GERAN.
  • GERAN is the radio component of GSM/EDGE, together with the network that joins the base stations (for example, the Ater and Abis interfaces) and the base station controllers (Ainterfaces, etc. ) .
  • the radio access network represents a component of a GSM network, through which phone calls and packet data are routed from and to the public switched telephone network (PSTN) and Internet to and from subscriber handsets, also known as user terminals or user equipments (UEs) .
  • PSTN public switched telephone network
  • UEs subscriber handsets
  • a mobile phone operator's network may comprise one or more GERANs, which may be coupled with Universal Terrestrial Radio Access Networks (UTRANs) in the case of a UMTS/GSM network.
  • UTRANs Universal Terrestrial Radio Access Networks
  • An operator network may also include one or more LTE networks, and/or one or more other networks.
  • the various different network types may use different radio access technologies (RATs) and radio access networks (RANs) .
  • RATs radio access technologies
  • RANs radio access networks
  • An OFDMA network may implement a radio technology such as evolved UTRA (E-UTRA) , IEEE 802.11, IEEE 802.16, IEEE 802.20, flash-OFDM and the like.
  • E-UTRA evolved UTRA
  • GSM Global System for Mobile Communications
  • LTE long term evolution
  • UTRA, E-UTRA, GSM, UMTS and LTE are described in documents provided from an organization named “3rd Generation Partnership Project” (3GPP)
  • cdma2000 is described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2) .
  • 3GPP 3rd Generation Partnership Project
  • 3GPP long term evolution LTE
  • UMTS universal mobile telecommunications system
  • the 3GPP may define specifications for the next generation of mobile networks, mobile systems, and mobile devices.
  • the present disclosure is concerned with the evolution of wireless technologies from LTE, 4G, 5G, NR, and beyond with shared access to wireless spectrum between networks using a collection of new and different radio access technologies or radio air interfaces.
  • 5G networks contemplate diverse deployments, diverse spectrum, and diverse services and devices that may be implemented using an OFDM-based unified, air interface. To achieve these goals, further enhancements to LTE and LTE-Aare considered in addition to development of the new radio technology for 5G NR networks.
  • the 5G NR will be capable of scaling to provide coverage (1) to a massive Internet of things (IoTs) with an ultra-high density (e.g., ⁇ 1M nodes/km2) , ultra-low complexity (e.g., ⁇ 10s of bits/sec) , ultra-low energy (e.g., ⁇ 10+ years of battery life) , and deep coverage with the capability to reach challenging locations; (2) including mission-critical control with strong security to safeguard sensitive personal, financial, or classified information, ultra-high reliability (e.g., ⁇ 99.9999%reliability) , ultra-low latency (e.g., ⁇ 1 ms) , and users with wide ranges of mobility or lack thereof; and (3) with enhanced mobile broadband including extreme high capacity (e.g., ⁇ 10 Tbps/km2) , extreme data rates (e.g., multi-Gbps rate, 100+ Mbps user experienced rates) , and deep awareness with advanced discovery and optimizations.
  • IoTs Internet of things
  • ultra-high density e.
  • 5G NR devices, networks, and systems may be implemented to use optimized OFDM-based waveform features. These features may include scalable numerology and transmission time intervals (TTIs) ; a common, flexible framework to efficiently multiplex services and features with a dynamic, low-latency time division duplex (TDD) /frequency division duplex (FDD) design; and advanced wireless technologies, such as massive multiple input, multiple output (MIMO) , robust millimeter wave (mmWave) transmissions, advanced channel coding, and device-centric mobility.
  • TTIs transmission time intervals
  • TDD dynamic, low-latency time division duplex
  • FDD frequency division duplex
  • advanced wireless technologies such as massive multiple input, multiple output (MIMO) , robust millimeter wave (mmWave) transmissions, advanced channel coding, and device-centric mobility.
  • Scalability of the numerology in 5G NR with scaling of subcarrier spacing, may efficiently address operating diverse services across diverse spectrum and diverse deployments.
  • subcarrier spacing may occur with 15 kHz, for example over 1, 5, 10, 20 MHz, and the like bandwidth.
  • subcarrier spacing may occur with 30 kHz over 80/100 MHz bandwidth.
  • the subcarrier spacing may occur with 60 kHz over a 160 MHz bandwidth.
  • subcarrier spacing may occur with 120 kHz over a 500MHz bandwidth.
  • the scalable numerology of 5G NR facilitates scalable TTI for diverse latency and quality of service (QoS) requirements. For example, shorter TTI may be used for low latency and high reliability, while longer TTI may be used for higher spectral efficiency.
  • QoS quality of service
  • 5G NR also contemplates a self-contained integrated subframe design with uplink/downlink scheduling information, data, and acknowledgement in the same subframe.
  • the self-contained integrated subframe supports communications in unlicensed or contention-based shared spectrum, adaptive uplink/downlink that may be flexibly configured on a per-cell basis to dynamically switch between uplink and downlink to meet the current traffic needs.
  • LTE terminology may be used as illustrative examples in portions of the description below; however, the description is not intended to be limited to LTE applications.
  • the present disclosure is concerned with shared access to wireless spectrum between networks using different radio access technologies or radio air interfaces, such as those of 5G NR.
  • wireless communication networks adapted according to the concepts herein may operate with any combination of licensed or unlicensed spectrum depending on loading and availability. Accordingly, it will be apparent to one of skill in the art that the systems, apparatus and methods described herein may be applied to other communications systems and applications than the particular examples provided.
  • FIG. 1 shows wireless network 100 for communication according to some aspects.
  • Wireless network 100 may, for example, comprise a 5G wireless network.
  • components appearing in FIG. 1 are likely to have related counterparts in other network arrangements including, for example, cellular-style network arrangements and non-cellular-style-network arrangements (e.g., device to device or peer to peer or ad hoc network arrangements, etc. ) .
  • Wireless network 100 illustrated in FIG. 1 includes a number of base stations 105 and other network entities.
  • a base station may be a station that communicates with the UEs and may also be referred to as an evolved node B (eNB) , a next generation eNB (gNB) , an access point, and the like.
  • eNB evolved node B
  • gNB next generation eNB
  • Each base station 105 may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to this particular geographic coverage area of a base station and/or a base station subsystem serving the coverage area, depending on the context in which the term is used.
  • base stations 105 may be associated with a same operator or different operators (e.g., wireless network 100 may comprise a plurality of operator wireless networks) , and may provide wireless communications using one or more of the same frequencies (e.g., one or more frequency bands in licensed spectrum, unlicensed spectrum, or a combination thereof) as a neighboring cell.
  • an individual base station 105 or UE 115 may be operated by more than one network operating entity.
  • each base station 105 and UE 115 may be operated by a single network operating entity.
  • a base station may provide communication coverage for a macro cell or a small cell, such as a pico cell or a femto cell, and/or other types of cell.
  • a macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions with the network provider.
  • a small cell such as a pico cell, would generally cover a relatively smaller geographic area and may allow unrestricted access by UEs with service subscriptions with the network provider.
  • a small cell such as a femto cell, would also generally cover a relatively small geographic area (e.g., a home) and, in addition to unrestricted access, may also provide restricted access by UEs having an association with the femto cell (e.g., UEs in a closed subscriber group (CSG) , UEs for users in the home, and the like) .
  • a base station for a macro cell may be referred to as a macro base station.
  • a base station for a small cell may be referred to as a small cell base station, a pico base station, a femto base station or a home base station. In the example shown in FIG.
  • base stations 105d and 105e may correspond to regular macro base stations, while base stations 105a-105c may correspond to macro base stations enabled with one of 3 dimension (3D) , full dimension (FD) , or massive MIMO.
  • Base stations 105a-105c may operate according to higher dimension MIMO capabilities to exploit 3D beamforming in both elevation and azimuth beamforming to increase coverage and capacity.
  • Base station 105f may correspond to a small cell base station which may be a home node or portable access point.
  • a base station may support one or multiple (e.g., two, three, four, and the like) cells.
  • Wireless network 100 may support synchronous or asynchronous operation.
  • the base stations may have similar frame timing, and transmissions from different base stations may be approximately aligned in time.
  • the base stations may have different frame timing, and transmissions from different base stations may not be aligned in time.
  • networks may be enabled or configured to handle dynamic switching between synchronous or asynchronous operations.
  • UEs 115 are dispersed throughout the wireless network 100, and each UE may be stationary or mobile.
  • a mobile device is commonly referred to as user equipment (UE) in standards and specifications promulgated by the 3rd Generation Partnership Project (3GPP)
  • UE user equipment
  • 3GPP 3rd Generation Partnership Project
  • such apparatus may also be referred to by those skilled in the art as a mobile station (MS) , 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 (AT) , a mobile terminal, a wireless terminal, a remote terminal, a handset, a terminal, a user agent, a mobile client, a client, a gaming device, an augmented reality device, vehicular component device/module, or some other suitable terminology.
  • AT access terminal
  • a “mobile” apparatus or UE need not necessarily have a capability to move, and may be stationary.
  • a mobile device such as the UE 115
  • a mobile device include a mobile phone, a cellular (cell) phone, a smart phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a laptop, a personal computer (PC) , a notebook, a netbook, a smart book, a tablet, and a personal digital assistant (PDA) .
  • a mobile device may additionally be an “Internet of things” (IoT) or “Internet of everything” (IoE) device such as an automotive or other transportation vehicle, a satellite radio, a global positioning system (GPS) device, a logistics controller, a drone, a multi-copter, a quad-copter, a smart energy or security device, a solar panel or solar array, municipal lighting, water, or other infrastructure; industrial automation and enterprise devices; consumer and wearable devices, such as eyewear, a wearable camera, a smart watch, a health or fitness tracker, a mammal implantable device, gesture tracking device, medical device, a digital audio player (e.g., MP3 player) , a camera, a game console, etc.
  • IoT Internet of things
  • IoE Internet of everything
  • a UE may be a device that includes a Universal Integrated Circuit Card (UICC) .
  • a UE may be a device that does not include a UICC.
  • UEs that do not include UICCs may also be referred to as IoE devices.
  • a UE may also be a machine specifically configured for connected communication, including machine type communication (MTC) , enhanced MTC (eMTC) , narrowband IoT (NB-IoT) and the like.
  • MTC machine type communication
  • eMTC enhanced MTC
  • NB-IoT narrowband IoT
  • UEs 115e-115k illustrated in FIG. 1 are examples of various machines configured for communication that access wireless network 100.
  • a mobile device such as UEs 115, may be able to communicate with any type of the base stations, whether macro base stations, pico base stations, femto base stations, relays, and the like.
  • a lightning bolt e.g., a communication link
  • UEs may operate as base stations or other network nodes in some scenarios.
  • Backhaul communication between base stations of wireless network 100 may occur using wired and/or wireless communication links.
  • base stations 105a-105c may serve UEs 115a and 115b using 3D beamforming and coordinated spatial techniques, such as coordinated multipoint (CoMP) or multi-connectivity.
  • Base station 105d may perform backhaul communications with base stations 105a-105c, as well as with base station 105f.
  • Base station 105d may transmits multicast services which are subscribed to and received by UEs 115c and 115d.
  • Such multicast services may include mobile television or stream video, or may include other services for providing community information, such as weather emergencies or alerts, such as Amber alerts or gray alerts.
  • Wireless network 100 may support mission critical communications with ultra-reliable and redundant links for mission critical devices, such UE 115e, which may be a drone. Redundant communication links may be used by UE 115e to communicate with base stations 105d and 105e, as well as base station 105f.
  • UE 115f thermometer
  • UE 115g smart meter
  • UE 115h wearable device
  • Wireless network 100 may also provide additional network efficiency through dynamic, low-latency TDD/FDD communications, such as in a vehicle-to-vehicle (V2V) mesh network between UEs 115i- 115k communicating with base station 105e.
  • V2V vehicle-to-vehicle
  • FIG. 2 shows a block diagram of a design of a base station 105 and a UE 115, which may be any of the base stations and one of the UEs in FIG. 1.
  • base station 105 may be a small cell base station (e.g., the base station 105f in FIG. 1)
  • UE 115 may be UE 115c or 115d operating in a service area of the base station 105f.
  • the UE 115 may be included in a list of accessible UEs for the base station 105f.
  • Base station 105 may also be a base station of some other type. As shown in FIG. 2, base station 105 may be equipped with antennas 234a through 234t, and UE 115 may be equipped with antennas 252a through 252r for facilitating wireless communications.
  • transmit processor 220 may receive data from data source 212 and control information from controller/processor 240.
  • the control information may be for the physical broadcast channel (PBCH) , physical control format indicator channel (PCFICH) , physical hybrid-ARQ (automatic repeat request) indicator channel (PHICH) , physical downlink control channel (PDCCH) , enhanced physical downlink control channel (EPDCCH) , MTC physical downlink control channel (MPDCCH) , etc.
  • the data may be for the PDSCH, etc.
  • Transmit processor 220 may process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively.
  • Transmit processor 220 may also generate reference symbols, e.g., for the primary synchronization signal (PSS) and secondary synchronization signal (SSS) , and cell-specific reference signal.
  • Transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, and/or the reference symbols, if applicable, and may provide output symbol streams to modulators (MODs) 232a through 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc. ) to obtain an output sample stream.
  • TX multiple-input multiple-output
  • MIMO multiple-input multiple-output
  • Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc. ) to obtain an output sample stream.
  • Each modulator 232 may additionally or alternatively process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal.
  • Downlink signals from modulators 232a through 232t may be transmitted via antennas 234a through 234t, respectively.
  • the antennas 252a through 252r may receive the downlink signals from base station 105 and may provide received signals to demodulators (DEMODs) 254a through 254r, respectively.
  • Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples.
  • Each demodulator 254 may further process the input samples (e.g., for OFDM, etc. ) to obtain received symbols.
  • MIMO detector 256 may obtain received symbols from demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • Receive processor 258 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 115 to data sink 260, and provide decoded control information to controller/processor 280.
  • transmit processor 264 may receive and process data (e.g., for the physical uplink shared channel (PUSCH) ) from data source 262 and control information (e.g., for the physical uplink control channel (PUCCH) ) from controller/processor 280. Transmit processor 264 may also generate reference symbols for a reference signal. The symbols from transmit processor 264 may be precoded by TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for SC-FDM, etc. ) , and transmitted to base station 105.
  • data e.g., for the physical uplink shared channel (PUSCH)
  • control information e.g., for the physical uplink control channel (PUCCH)
  • controller/processor 280 e.g., for the physical uplink control channel (PUCCH)
  • Transmit processor 264 may also generate reference symbols for a reference signal.
  • the symbols from transmit processor 264 may be precoded by TX MIMO processor 266 if applicable,
  • the uplink signals from UE 115 may be received by antennas 234, processed by demodulators 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 115.
  • Processor 238 may provide the decoded data to data sink 239 and the decoded control information to controller/processor 240.
  • Controllers/processors 240 and 280 may direct the operation at base station 105 and UE 115, respectively. Controller/processor 240 and/or other processors and modules at base station 105 and/or controller/processor 280 and/or other processors and modules at UE 115 may perform or direct the execution of various processes for the techniques described herein, such as to perform or direct the operations illustrated in FIG. 5. Memories 242 and 282 may store data and program codes for base station 105 and UE 115, respectively. Scheduler 244 may schedule UEs for data transmission on the downlink and/or uplink.
  • Wireless communications systems operated by different network operating entities may share spectrum.
  • a network operating entity may be configured to use an entirety of a designated shared spectrum for at least a period of time before another network operating entity uses the entirety of the designated shared spectrum for a different period of time.
  • certain resources e.g., time
  • a network operating entity may be allocated certain time resources reserved for exclusive communication by the network operating entity using the entirety of the shared spectrum.
  • the network operating entity may also be allocated other time resources where the entity is given priority over other network operating entities to communicate using the shared spectrum.
  • These time resources, prioritized for use by the network operating entity may be utilized by other network operating entities on an opportunistic basis if the prioritized network operating entity does not utilize the resources. Additional time resources may be allocated for any network operator to use on an opportunistic basis.
  • Access to the shared spectrum and the arbitration of time resources among different network operating entities may be centrally controlled by a separate entity, autonomously determined by a predefined arbitration scheme, or dynamically determined based on interactions between wireless nodes of the network operators.
  • UE 115 and base station 105 may operate in a shared radio frequency spectrum band, which may include licensed or unlicensed (e.g., contention-based) frequency spectrum.
  • UEs 115 or base stations 105 may traditionally perform a medium-sensing procedure to contend for access to the frequency spectrum.
  • UE 115 or base station 105 may perform a listen before talk (LBT) procedure such as a clear channel assessment (CCA) prior to communicating in order to determine whether the shared channel is available.
  • LBT listen before talk
  • CCA clear channel assessment
  • a CCA may include an energy detection procedure to determine whether there are any other active transmissions.
  • a device may infer that a change in a received signal strength indicator (RSSI) of a power meter indicates that a channel is occupied.
  • RSSI received signal strength indicator
  • a CCA also may include detection of specific sequences that indicate use of the channel.
  • another device may transmit a specific preamble prior to transmitting a data sequence.
  • an LBT procedure may include a wireless node adjusting its own backoff window based on the amount of energy detected on a channel and/or the acknowledge/negative-acknowledge (ACK/NACK) feedback for its own transmitted packets as a proxy for collisions.
  • ACK/NACK acknowledge/negative-acknowledge
  • the wireless communication system 300 includes multiple base stations, such as a first base station (e.g., the base station 105a) and a second base station (e.g., the base station 105b) .
  • the wireless communication system 300 may further include a public land mobile network (PLMN) device 302.
  • PLMN public land mobile network
  • the base station 105a and the base station 105b are associated with a common wireless communication protocol.
  • the common wireless communication protocol is a fourth-generation long term evolution (4G LTE) wireless communication protocol, a fifth-generation new-radio (5G NR) wireless communication protocol, or a non-standalone (NSA) mode that supports communication by the UE 115 based on the 4G LTE wireless communication protocol and also based on the 5G NR wireless communication protocol.
  • 4G LTE fourth-generation long term evolution
  • 5G NR fifth-generation new-radio
  • NSA non-standalone
  • the PLMN device 302 may be associated with a wireless communication protocol that is different than the wireless communication protocol associated with the base station 105a and the base station 105b.
  • the PLMN device 302 may be associated with a second generation (2G) wireless communication protocol, a third generation (3G) wireless communication protocol, or a wideband code-division multiple access (WCDMA) wireless communication protocol, as illustrative examples.
  • 2G second generation
  • 3G third generation
  • WCDMA wideband code-division multiple access
  • the wireless communication system 300 further includes the UE 115.
  • FIG. 3 illustrates that the UE 115 includes one or more processors (e.g., the controller/processor 280) and one or more memories (e.g., the memory 282) coupled to the one or more processors.
  • processors e.g., the controller/processor 280
  • memories e.g., the memory 282
  • the UE 115 further includes multiple subscriber identity modules (SIMs) , such as a first SIM 380a and a second SIM 380b.
  • SIMs subscriber identity modules
  • the first SIM 380a may be associated with a first service 382a
  • the second SIM 380b may be associated with a second service 382b.
  • the first service 382a may be associated with one or more of a first phone number or a first network type
  • the second service 382b may be associated with one or more of a second phone number different than the first phone number or a second network type different than the first network type.
  • the SIMs 380a-b are coupled to a dual 5G NR modem that enables the services 382a-b.
  • the UE 115 has a dual-SIM, dual-standby (DSDS) configuration or a dual-SIM, dual-active (DSDA) configuration.
  • the services 382a-b are associated with a common network operator, such as a common service provider of the services 382a-b.
  • the UE 115 may further include one or more timers.
  • the UE 115 may include a respective timer for each service associated with the UE 115.
  • the UE 115 may include a first timer 360a associated with the first service 382a and may further include a second timer 360b associated with the second service 382b.
  • the UE 115 may further include one or more counters.
  • the UE 115 may include a counter for each service associated with the UE 115.
  • the UE 115 may include a first counter 370a associated with the first service 382a and may further include a second counter 370b associated with the second service 382b.
  • the UE 115 may communicate with one or more base stations 105 based on the first service 382a, the second service 382b, or both.
  • the first service 382a may send a request to the base station 105a to establish communication with the base station 105a.
  • the UE 115 may receive a first message 306 to the UE 115 in response to the request.
  • the first message 306 indicates a first message authentication code for integrity (MAC-I) 308 and further indicates a source of the first message 306 as the base station 105a.
  • MAC-I first message authentication code for integrity
  • a source field or a cell identification field of the first message 306 indicates the base station 105a.
  • the first message 306 includes a source indication 310 specifying a source (or an alleged source) of the first message 306.
  • the source indication 310 includes a cell global identity (CGI) identifier of the base station 105a.
  • CGI cell global identity
  • the base station 105a is the source of the first message 306.
  • the UE 115 may receive the first message 306 from an entity “spoofing” the first message 306, such as from a malicious entity, such as a hacker attempting to gain authorized access to a network or a device.
  • the UE 115 is configured to perform a network access stratum (NAS) security mode control procedure with base stations, such as the base station 105a.
  • NAS network access stratum
  • the UE 115 may send to the base station 105a a request, such as an attach request or a tracking area update (TAU) request.
  • the first message 306 may include a security mode command that is sent by the base station 105a in response to the request sent by the UE 115.
  • the UE 115 may initiate a MAC-I verification procedure to verify the first message 306 based on the first MAC-I 308.
  • the UE 115 may determine (e.g., compute) a second MAC-I 330.
  • the second MAC-I 330 may correspond to a computed MAC-I (X-MAC) .
  • the UE 115 may determine the second MAC-I 330 based on one or more input parameters, such as one or more parameters of the first message 306, a key, one or more other parameters, or a combination thereof.
  • the UE 115 may be configured to compare the first MAC-I 308 to the second MAC-I 330 to determine whether the first MAC-I 308 corresponds to (e.g., matches) the second MAC-I 330 or whether the first MAC-I 308 differs from (e.g., mismatches) the second MAC- I 330. In response to determining that the first MAC-I 308 corresponds to the second MAC-I 330, the UE 115 may verify integrity of the first message 306, such as by determining that the first message 306 was sent by the base station 105a.
  • the UE 115 may fail to verify integrity of the first message 306.
  • the first message 306 may be sent by a malicious entity, such as a hacker attempting to gain authorized access to a network or a device.
  • the UE 115 may request, from the base station 105a, one or more additional MAC-Is.
  • the UE 115 may compare the MAC-I to another MAC-I (e.g., an X-MAC, such as the second MAC-I 330, or another MAC-I) computed by the UE 115 to attempt to identify a match between a MAC-I provided by the base station 105a and a MAC-I determined by the UE 115.
  • another MAC-I e.g., an X-MAC, such as the second MAC-I 330, or another MAC-I
  • the UE 115 is configured to initiate operation of the first counter 370a in response to detecting that the second MAC-I 330 differs from the first MAC-I 308. For example, the UE 115 may initiate a counting operation to a first threshold counter value 338a. In some implementations, the UE 115 adjusts (e.g., increases) a first value 372a of the first counter 370a in response to each detected MAC-I mismatch. The UE 115 may be configured to terminate attempts to identify a MAC-I match in response identifying that the first value 372a of the first counter 370a satisfies (e.g., is greater than, or is greater than or equal to) the first threshold counter value 338a.
  • the UE 115 is configured to add an indication 344a of the base station 105a to first control information 340a associated with the first service 382a.
  • the UE 115 is configured to add the indication 344a to the first control information 340a in response to detecting that the first value 372a of the first counter 370a satisfies the first threshold counter value 338a.
  • the indication 344a includes cell identification information of a message, such as the source indication 310 of the first message 306.
  • the source indication 310 may include a CGI identifier of the base station 105a, as an illustrative example.
  • the UE 115 may be configured to reset the first value 372a of the first counter 370a in response to adding the indication 344a to the first control information 340a.
  • the first control information 340a includes a first list 342a of cells associated with the first service 382a that are barred by the UE 115 due to detection of MAC-I mismatch conditions associated with the cells.
  • the indication 344a may specify that the base station 105a corresponds to a cell barred from communication with the first service 382a due to one or more MAC-I mismatch conditions associated with the base station 105a.
  • the UE 115 may identify a second base station for camping by the first service 382a, such as the base station 105b. During operation based on the first service 382a, the UE 115 may access the first control information 340a to identify the base station 105b for camping by the first service 382a.
  • the UE 115 may terminate attempting to identify a MAC-I match with the base station 105a and may perform a search to identify one or more other cells (e.g., one or more neighbor cells of the base station 105a) for camping by the first service 382a.
  • performing the search may include receiving a control message 312 from the base station 105b.
  • control message 312 includes one or more of a master information block (MIB) associated with the base station 105b, a system information block (SIB) associated with the base station 105b, or a synchronization signal block (SSB) associated with the base station 105b, as illustrative examples.
  • MIB master information block
  • SIB system information block
  • SSB synchronization signal block
  • the UE 115 may determine, based on the control message 312, that the base station 105b is a candidate for camping by the first service 382a. In some examples, the UE 115 determines that the base station 105b is a candidate for camping by the first service 382a based on a received signal strength of the control message 312 satisfying a threshold signal strength, based on capability information indicated by the control message 312 satisfying threshold capability parameters, one or more other criteria, or a combination thereof.
  • the UE 115 may access the first control information 340a to determine whether the base station 105b is indicated in the first list 342a of cells barred by the UE 115 in connection with the first service 382a.
  • the UE 115 is configured to search the first list 342a to detect whether the first list 342a includes an indication of the base station 105b provided in the control message 312.
  • the UE 115 may decline to initiate a connection setup procedure with the base station 105b using the first service 382a.
  • the UE 115 may identify one or more other base stations as candidates for camping by the first service 382a, such as the base station 105c (e.g., in response to receiving a control message from the base station 105c) .
  • the UE 115 may access the first list 342a to determine whether the first list 342a includes an indication of the base station 105c.
  • the UE 115 may initiate a connection setup procedure with the base station 105b.
  • the connection setup procedure with the base station 105b may include one or more operations described with reference to the NAS security mode control procedure with the base station 105b, such as a MAC-I verification procedure.
  • the UE 115 may receive a message from the base station 105b indicating a MAC-I and a source indication (e.g., a CGI identifier) of the base station 105b.
  • the UE 115 may detect failure of the MAC-I verification procedure with the base station 105b (e.g., due to a MAC-I mismatch condition with the base station 105b) . In this case, the UE 115 may add an indication of the base station 105b (e.g., a source indication, such as a CGI identifier of the base station 105b) to the first list 342a and may identify one or more other candidate base stations for camping by the first service 382a.
  • an indication of the base station 105b e.g., a source indication, such as a CGI identifier of the base station 105b
  • the UE 115 may complete the NAS security mode control procedure with the base station 105b, which may include receiving an attachment acceptance message or a TAU acceptance message from the base station 105b, as illustrative examples.
  • the UE 115 may communicate data or other messages with the base station 105b using a wireless communication protocol.
  • the UE 115 in response to selecting a second base station (e.g., the base station 105b) for camping by the first service 382a, the UE 115 generates an indication 390 of the source of the first message 306 for the second service 382b.
  • the first SIM 380a (or the first service 382a) may “share” the source of the first message 306 with the second SIM 380b (or the second service 382b) via the indication 390.
  • the UE 115 may reduce or avoid duplication of one or more operations associated with the first service 382a during operation based on the second service 382b.
  • the first SIM 380a provides the indication 390 to the second SIM 380b.
  • the first SIM 380a and the second SIM 380b may each be coupled to a bus that the first SIM 380a uses to provide the indication 390 to the second SIM 380b.
  • the indication 390 may correspond to an entry (e.g., one or more values) in a memory of the UE 115 (such as the memory 282) or a flag (e.g., a bit stored in a register of the UE 115) .
  • the first SIM 380a may set a flag in a control register to indicate that the first list 342a has been modified.
  • the flag may correspond to the indication 390.
  • the second SIM 380b may access the first list 342a to identify an indication of the base station 105a (e.g., based on the indication 344a) based on the flag.
  • the UE 115 avoids communication with the base station 105a in response to the indication 390.
  • a mode change may be performed from the first service 382a to the second service 382b.
  • the mode change may occur if a user indicates a change from operation based on a first phone number associated with the first service 382a to operation based on a second phone number associated with the second service 382b.
  • the UE 115 may avoid initiating communications with the base station 105a based on the indication 390 during operation according to the second service 382b.
  • the UE 115 may send a request 320 to camp with the base station 105b in response to the indication 390.
  • the UE 115 may perform one or more attempts to establish communication with the base station 105a (e.g., as a “second chance” for the base station 105a) during operation according to the second service 382b.
  • the UE 115 may update second control information 340b associated with the second service 382b to indicate the source of the first message 306 and may attempt to establish communications with the base station 105b.
  • Establishing communications with the base station 105b may include receiving a second message 314 indicating a third MAC-I 316 and further indicating the base station 105a as a source of the second message 314 (e.g., via a source indication, such as the source indication 310) .
  • the UE 115 may perform one or more attempts to determine a MAC-I match condition between the second service 382b and the base station 105a.
  • the second service 382b may camp with the base station 105a in response to detecting a MAC-I match condition between the second service 382b and the base station 105a.
  • the UE 115 may detect that the third MAC-I 316 matches a fourth MAC-I 332 (e.g., an X-MAC) determined by the UE 115.
  • the UE 115 may select the base station 105a for camping by the second service 382b.
  • the UE 115 may detect a MAC-I mismatch condition between the third MAC-I 316 and the fourth MAC-I 332.
  • the UE 115 may initiate operation of the second counter 370b.
  • the UE 115 may perform one or more attempts to detect a MAC-I match condition between the second service 382b and the base station 105a and may increment a second value 372b of the second counter 370b based on detecting a MAC-I mismatch condition between the second service 382b and the base station 105a.
  • the UE 115 may terminate attempts to detect a MAC-I match condition between the second service 382b and the base station 105a. In this case, the UE 115 may select another base station for camping by the second service 382b, such as by selecting the base station 105c for camping by the second service 382b upon detecting a MAC-I match condition with the base station 105b.
  • the UE 115 may select the base station 105b for camping by the second service 382b without attempting to determine a MAC-I match condition with the base station 105a.
  • the UE 115 may perform one or more attempts to determine a MAC-I match condition with the base station 105a prior to selecting another base station for camping by the second service 382b. Certain illustrative aspects of the first example and the second example are described further with reference to FIGS. 4A and 4B, respectively.
  • the UE 115 updates the second control information 340b in response to the indication 390 by adding an indication 344b of the base station 105a to the second control information 340b. In one example, the UE 115 adds the indication 344b to the second control information 340b in response to detecting that the second value 372b of the second counter 370b satisfies the second threshold counter value 338b. In some examples, the indication 344b includes cell identification information, such as the source indication 310 (e.g., a CGI identifier of the base station 105a) . The UE 115 may reset the second value 372b of the second counter 370b in response to adding the indication 344b to the second control information 340b.
  • the source indication 310 e.g., a CGI identifier of the base station 105a
  • the second control information 340b includes a second list 342b of cells associated with the second service 382b that are barred by the UE 115 due to detection of MAC-I mismatch conditions associated with the cells.
  • the indication 344b may specify that the base station 105a corresponds to a cell barred from communication with the second service 382b due to one or more MAC-I mismatch conditions associated with the base station 105a.
  • the second threshold counter value 338b is different than the first threshold counter value 338a.
  • the second threshold counter value 338b may correspond to a “relaxed” version of the first threshold counter value 338a.
  • the second threshold counter value 338b may be less than the first threshold counter value 338a.
  • the second threshold counter value 338b may correspond to a value of one
  • the first threshold counter value 338a may correspond to a value of two or more.
  • the UE 115 may perform multiple attempts to identify a MAC-I match condition with the base station 105a during operation based on the first service 382a and may perform one attempt to identify a MAC-I match condition with the base station 105a during operation based on the second service 382b in response to the indication 390.
  • the second threshold counter value 338b may correspond to the first threshold counter value 338a.
  • the threshold counter values 338a-b may correspond to the same value.
  • the UE 115 is configured to delete (e.g., erase, overwrite, or invalidate) one or more entries included in the first control information 340a, the second control information 340b, or both.
  • the UE 115 is configured to maintain one or both of the first list 342a and the second list 342b on a first-in, first-out (FIFO) basis. For example, to add the indication 344a to the first list 342a, the UE 115 may replace a least- recently added entry of the first list 342a with the indication 344a.
  • the UE 115 may replace a least-recently added entry of the second list 342b with the indication 344b.
  • the UE 115 may use one or more other techniques to manage the first list 342a and the second list 342b, such as by overwriting entries of the first list 342a and the second list 342b on a least- frequently used (LFU) basis.
  • LFU least- frequently used
  • the UE 115 may replace a least-frequently accessed entry of the first list 342a with the indication 344a.
  • the UE 115 may replace a least-frequently accessed entry of second list 342b with the indication 344b.
  • the UE 115 may be configured to detect a trigger event and to delete one or more entries of the control information 340a-b in response to detecting the trigger event. Upon detection of the trigger event, the UE 115 may delete one or more entries of the control information 340a-b, such as by deleting the one or more entries on a FIFO basis or on a LFU basis, as illustrative examples. In some other implementations, deletion of the one or more entries is performed on a per-service basis. For example, detection of a trigger event may cause the UE 115 to clear one or more entries associated with one of the services 382a-b but not to any entries associated with the other of the services 382a-b.
  • deletion of the one or more entries is performed on a global basis.
  • detection of the trigger event cause the UE 115 to delete one or more entries of the first control information 340a and to delete one or more entries of the second control information 340b (e.g., by deleting all entries of the first list 342a and by deleting all entries of the second list 342b) .
  • detecting the trigger event includes detecting removal or insertion at the UE 115 of the first SIM 380a or the second SIM 380b.
  • the UE 115 deletes the first control information 340a based on removal or insertion of the first SIM 380a and deletes the second control information 340b based on removal or insertion of the second SIM 380b.
  • the controller/processor 280 detects removal or insertion of the SIMs 380a-b from the UE 115, such as by monitoring a SIM card slot of the UE 115 or by monitoring a bus that may be coupled to the SIM card slot, as illustrative examples.
  • the trigger event may correspond to detection of a power- cycle event of the UE 115.
  • the memory 282 includes a non- volatile memory configured to store the control information 340a-b, and the UE 115 is configured to delete the control information 340a-b from the non-volatile memory in response to detecting the power-cycle.
  • the memory 282 includes volatile memory configured to store the control information 340a-b, and the control information 340a-b is deleted (or lost) from the volatile memory in response to the power-cycle.
  • detecting the trigger event includes detecting that a value of a timer satisfies a threshold timer value, where the timer is associated with a particular base station corresponding to the one or more entries, and where the one or more entries are deleted based on detecting that the value of the timer satisfies the threshold timer value.
  • the UE 115 may be configured reset a first value 362a of the first timer 360a in response to updating the first control information 340a (e.g., in response to adding the indication 344a to the first list 342a) and to initiate a counting operation to a first threshold timer value 336a.
  • the UE 115 may be configured to detect the trigger event by detecting that the first value 362a of the first timer 360a satisfies the first threshold timer value 336a.
  • the UE 115 may be configured to delete one or more entries of the first control information 340a in response to detecting that the first value 362a of the first timer 360a satisfies the first threshold timer value 336a.
  • the first threshold timer value 336a may correspond to a duration of six hours. In other examples, the first threshold timer value 336a may correspond to another duration.
  • the UE 115 may be configured reset a second value 362b of the second timer 360b in response to updating the second control information 340b (e.g., in response to adding the indication 344b to the second list 342b) and to initiate a counting operation to a second threshold timer value 336b.
  • the UE 115 may be configured to detect the trigger event by detecting that the second value 362b of the second timer 360b satisfies the second threshold timer value 336b.
  • the UE 115 may be configured to delete one or more entries of the second control information 340b in response to detecting that the second value 362b of the second timer 360b satisfies the second threshold timer value 336b.
  • the second threshold timer value 336b may correspond to the first threshold timer value 336a or may be different than the first threshold timer value 336a.
  • the UE 115 executes instructions of a wireless communication protocol stack.
  • the memory 282 may store the instructions of the wireless communication protocol stack, and the controller/processor 280 may retrieve the instructions of the wireless communication protocol stack and to execute the instructions of the wireless communication protocol stack to communicate with one or more devices described herein, such as the base stations 105a-c.
  • the wireless communication protocol stack includes multiple layers, such as a first layer (e.g., an NAS layer) and a second layer (e.g., a radio resource control (RRC) layer) .
  • the instructions of the wireless communication protocol stack may include instructions associated with the first layer and instructions associated with the second layer.
  • execution of the instructions of the first layer may be associated with some operations, and execution of the instructions of the second layer may be associated with other operations.
  • the UE 115 may execute the instructions of the first layer to detect a MAC-I match condition, to detect a MAC-I mismatch condition, to operate the timers 360a-b, to operate the counters 370a-b, or a combination thereof.
  • the UE 115 may execute the instructions of the second layer to update the control information 340a-b, to select the base station 105b for camping by the first service 382a, to select the base station 105b for camping by the second service 382b (e.g., in response to the indication 390) , or a combination thereof.
  • the base station 105b is selected for camping by the first service 382a prior to completion of a first instance of a MAC-I verification procedure associated with the base station 105a, and the base station 105b is selected for camping by the second service 382b prior to completion of a second instance of the MAC-I verification procedure with the base station 105a.
  • a wireless communication protocol may specify that an instance of the MAC-I verification procedure is to be attempted for a particular duration (e.g., before the MAC-I verification procedure “times out” ) .
  • the wireless communication protocol may specify that if the MAC-I verification procedure has not succeeded by the end of the particular duration, then the UE 115 is to “fall back” to another device, such as the PLMN device 302.
  • completion of the MAC-I verification procedure may be associated selection of PLMN device for camping, such as the PLMN device 302.
  • the PLMN device 302 may be associated with reduced capabilities (e.g., lower data rates or less robust network security features) as compared to the base stations 105a-c.
  • selecting the base station 105b for camping prior to completion of the MAC-I verification procedure enables the UE 115 to avoid selecting the PLMN device 302 for camping.
  • certain operations described herein are performed based on a particular mode of the UE 115.
  • the UE 115 may be configured to perform certain operations of FIG. 3 while operating according to a non-standalone (NSA) 5G NR mode of operation and to omit certain operations of FIG. 3 while operating according to a standalone (SA) 5G NR mode of operation.
  • SA standalone
  • a MAC-I mismatch condition during the NSA 5G NR mode of operation is associated with larger delays and more instances of interrupted connectivity (e.g., an out-of-service (OOS) state) as compared to the SA 5G NR mode.
  • interrupted connectivity e.g., an out-of-service (OOS) state
  • the UE 115 is configured to perform base station reselection in response to detection of a MAC-I mismatch while in the NSA 5G NR mode and to decline to perform base station reselection in response to detection of a MAC-I mismatch while in the SA 5G NR mode. Further, in some implementations, described herein may be performed in cases where the services 382a-b are associated with a common operator, such as a common service provider.
  • One or more aspects described with reference to FIG. 3 may improve performance or security of a wireless communication system 300. For example, by barring a cell and reselecting another cell using the first control information 340a in response to a MAC-I mismatch condition, performance and security of the UE 115 may be improved as compared to other techniques. To further illustrate, the UE 115 may reduce or avoid an OOS state associated with techniques that repeat a MAC-I verification procedure until a “time out” event.
  • the UE 115 may remain connected to a base station (e.g., the base station 105b) associated with a more recent wireless communication protocol, such as a fourth generation (4G) or a fifth generation (5G) wireless communication protocol (e.g., instead of “falling back” to the PLMN device 302, which may be associated with a 2G or a 3G wireless communication protocol) .
  • a base station that operates in accordance with a more recent wireless communication protocol may be associated with faster data rates and increased security as compared to a base station that operates in accordance with a less recent wireless communication protocol. Accordingly, performance and security may be enhanced.
  • cell reselection information can be provided by the first service 382a to the second service 382b, which may reduce or avoid instances of an OOS state with respect to the second service 382b and which may enable faster reselection to a second base station, such as the base station 105b.
  • FIG. 4A depicts an example of a ladder diagram illustrating examples of operations 400 that may be performed by a wireless communication system, such as the wireless communication system 300 of FIG. 3.
  • the operations 400 correspond to the first example described with reference to FIG. 3. It is noted that the operations 400 are illustrative and are not intended to limit the scope of the disclosure. For example, a process in accordance with the disclosure may include a different number of operations, may include a different type of operations, may include one or more operations not illustrated in FIG. 4A, or may exclude one or more operations illustrated in FIG. 4A.
  • the operations 400 may be performed by the UE 115, the base station 105a, and the base station 105b. In the example of FIG. 4, some of the operations 400 are described with reference to the first service 382a, and others of the operations 400 are described with reference to the second service 382b.
  • the operations 400 may include sending a request to the base station 105a, at 402.
  • the request may correspond to an attach request or a TAU request sent by the UE 115 to the base station 105a.
  • the operations 400 may further include receiving, from the base station 105a, a response to the request, at 404.
  • the response may correspond to the first message 306 of FIG. 3.
  • the response corresponds to a first security mode command associated with an NAS security mode control procedure performed by the UE 115 and the base station 105a.
  • the response may indicate a MAC-I, such as the first MAC-I 308.
  • the operations 400 may further include determining whether a MAC-I mismatch has occurred.
  • the UE 115 may compare a MAC-I indicated by the response sent by the base station 105a (e.g., the first MAC-I 308) to a MAC-I computed by the UE 115 (e.g., the second MAC-I 330) .
  • the operations 400 may optionally include sending a security mode completion message to the base station 105a and receiving an acceptance message from the base station 105a.
  • the acceptance message includes an attachment acceptance message.
  • the acceptance message includes a TAU acceptance message.
  • the operations 400 may end, at 430.
  • the UE 115 may send a security mode rejection message, at 406.
  • the security mode rejection message may indicate the MAC-I mismatch.
  • the UE 115 may optionally re-request a MAC-I from the base station 105a one or more times. In this case, the UE 115 may re-determine (at 406) whether a MAC-I mismatch has occurred one or more times.
  • the operations 400 may optionally include detecting whether the first threshold counter value 338a is satisfied.
  • the UE 115 may adjust the first value 372a of the first counter 370a in response to each detected MAC-I mismatch and may detect whether the adjusted first value 372a satisfies the first threshold counter value 338a.
  • the UE 115 may re-determine (at 406) whether a MAC-I mismatch has occurred one or more times.
  • the operations 400 may further include performing an update operation, at 408.
  • performing the update operation includes updating the first control information 340a, such as by adding the indication 344a to the first list 342a.
  • the UE 115 performs the update operation in response to detecting that the first threshold counter value 338a is satisfied.
  • the operations 400 may further include waiting based on a guard band time interval, at 410. For example, prior to reselecting from the base station 105a to the base station 105b, the UE 115 may wait a guard band time interval (e.g., “T_Bar_NSA_Cell” ) .
  • a guard band time interval e.g., “T_Bar_NSA_Cell”
  • the operations 400 may further include performing a first cell reselection and camping operation associated with the first service 382a, at 412.
  • the UE 115 may send one or more configuration messages (e.g., one or more RRC messages) associated with the first service 382a to the base station 105a, to the base station 105b, to one or more other devices, or a combination thereof.
  • the one or more configuration messages may indicate deselection of the base station 105a for camping by the first service 382a and selection of the base station 105b for camping by the first service 382a.
  • the operations 400 may further include generating an indication of the first cell reselection and camping operation, at 414.
  • the indication corresponds to the indication 390 of FIG. 3.
  • the operations 400 may further include performing an update operation to update the second control information 340b, such as by adding the indication 344b to the second list 342b.
  • the operations 400 may further include, in response to the indication, performing a second cell reselection and camping operation associated with the second service 382b, at 416.
  • the UE 115 may send one or more configuration messages (e.g., one or more RRC messages) associated with the second service 382b to the base station 105a, to the base station 105b, to one or more other devices, or a combination thereof.
  • the one or more configuration messages may indicate selection of the base station 105b for camping by the second service 382b.
  • the operations 400 may optionally include performing a procedure 418.
  • the procedure 418 may be performed in response to a change in a tracking area code (TAC) or in response to another condition that is specified by a wireless communication protocol and that triggers a TAU or attach process.
  • TAC tracking area code
  • the procedure 418 may include sending a request to the base station 105b, at 422.
  • the request may correspond to an attach request or a TAU request sent by the UE 115 to the base station 105b.
  • the request may indicate that the UE 115 supports or requests a dual connectivity new radio (DCNR) feature.
  • the request may be associated with the first service 382a.
  • DCNR dual connectivity new radio
  • the procedure 418 may include receiving, from the base station 105b, a response to the request, at 424.
  • the response may correspond to an attachment acceptance message or a TAU acceptance message.
  • the response may be associated with the first service 382a.
  • the procedure 418 may include sending a request to the base station 105b, at 426.
  • the request may correspond to an attach request or a TAU request sent by the UE 115 to the base station 105b.
  • the request may indicate that the UE 115 supports or requests a DCNR feature.
  • the request may be associated with the second service 382b.
  • the procedure 418 may include receiving, from the base station 105b, a response to the request, at 428.
  • the response may correspond to an attachment acceptance message or a TAU acceptance message.
  • the response may be associated with the second service 382b.
  • the operations 400 may terminate, at 430.
  • One or more aspects of FIG. 4A may improve performance of a wireless communication system. For example, based on the indication of the first cell reselection and camping operation, the second service 382b may avoid communication with the base station 105a and may select the base station 105b for camping. As a result, the UE 115 may reduce or avoid an OOS state associated with the second service 382b that can occur if the second service 382b attempts to communicate with the base station 105a. As another example, by avoiding the OOS state, the UE 115 may avoid “falling back” to the PLMN device 302, which may be associated with a 2G or a 3G wireless communication protocol. In some cases, a base station that operates in accordance with a more recent wireless communication protocol may be associated with faster data rates and increased security as compared to a base station that operates in accordance with a less recent wireless communication protocol. Accordingly, performance and security may be enhanced.
  • FIG. 4B depicts an example of a ladder diagram illustrating examples of operations 450 that may be performed by a wireless communication system, such as the wireless communication system 300 of FIG. 3.
  • the operations 450 correspond to the second example described with reference to FIG. 3.
  • the operations 450 are illustrative and are not intended to limit the scope of the disclosure.
  • a process in accordance with the disclosure may include a different number of operations, may include a different type of operations, may include one or more operations not illustrated in FIG. 4B, or may exclude one or more operations illustrated in FIG. 4B.
  • the operations 450 may be performed by the UE 115, the base station 105a, and the base station 105b. In the example of FIG. 4B, some of the operations 450 are described with reference to the first service 382a, and others of the operations 450 are described with reference to the second service 382b.
  • the operations 450 may include one or more of the operations 400 described with reference to FIG. 4A.
  • the operations 450 include each of the operations 400 depicted in the example of FIG. 4A.
  • the operations 450 may further include performing an update operation, at 452, to update the second control information 340b, such as by adding the indication 344b to the second list 342b.
  • UE 115 may perform the update operation without reselection (or without immediate reselection) from the base station 105a to another base station, such as the base station 105b.
  • the UE 115 may perform one or more attempts to establish a MAC-I match between the second service 382b and the base station 105a prior to performing reselection to another base station.
  • the operations 450 may include sending a request to the base station 105a, at 456.
  • the request may correspond to an attach request or a TAU request sent by the UE 115 to the base station 105a.
  • the operations 450 may further include receiving, from the base station 105a, a response to the request, at 458.
  • the response may correspond to the second message 314 of FIG. 3.
  • the response corresponds to a first security mode command associated with an NAS security mode control procedure performed by the UE 115 and the base station 105a.
  • the response may indicate a MAC-I, such as the third MAC-I 316.
  • the operations 450 may further include determining whether a MAC-I mismatch has occurred. For example, the UE 115 may compare a MAC-I indicated by the response sent by the base station 105a (e.g., the first MAC-I 308) to a MAC-I computed by the UE 115 (e.g., the fourth MAC-I 332) .
  • the operations 400 may optionally include sending a security mode completion message to the base station 105a and receiving an acceptance message from the base station 105a.
  • the acceptance message includes an attachment acceptance message.
  • the acceptance message includes a TAU acceptance message.
  • the operations 450 may end, at 430.
  • the UE 115 may send a security mode rejection message, at 460.
  • the security mode rejection message may indicate the MAC-I mismatch.
  • the UE 115 may optionally re-request a MAC-I from the base station 105a one or more times. In this case, the UE 115 may re-determine (at 460) whether a MAC-I mismatch has occurred one or more times.
  • the operations 450 may optionally include detecting whether the second threshold counter value 338b is satisfied.
  • the UE 115 may adjust the second value 372b of the second counter 370b in response to each detected MAC-I mismatch and may detect whether the adjusted second value 372b satisfies the second threshold counter value 338b.
  • the UE 115 may re-determine (at 460) whether a MAC-I mismatch has occurred one or more times.
  • FIG. 4B may improve performance of a wireless communication system. For example, based on the indication of the first cell reselection and camping operation, the second service 382b may perform one or more attempts to establish a MAC-I match with the base station 105a before selecting another base station for camping. In some cases, the techniques of FIG. 4B result in fewer base stations being indicated in the second list 342b as compared to the techniques of FIG. 4A, which may increase a number of base stations available for communication with the UE 115 during operation based on the second service 382b. Alternatively, in some implementations, the techniques of FIG.
  • 4A may enable faster connection to a base station (e.g., by avoiding a potential MAC-I mismatch condition with the base station 105a and by camping with the base station 105b in response to the indication of the indication of the first cell reselection and camping operation) .
  • FIG. 5 is a flow chart illustrating an example of a method 500 of wireless communication performed by a UE to perform base station reselection for multiple services in response to detection of a MAC-I mismatch condition according to some aspects of the disclosure.
  • the method 500 is performed by the UE 115.
  • the method 500 includes receiving a message by a UE during operation of the UE based on a first service associated with the UE, at 502.
  • the message indicates a first MAC-I and further indicates a first base station as a source of the message.
  • the UE 115 may receive the first message 306 during operation based on the first service 382a.
  • the first message 306 may indicate the base station 105a as a source of the first message 306.
  • the method 500 further includes, in response to detecting that the first MAC-I differs from a second MAC-I determined by the UE, updating first control information associated with the first service to indicate the source of the message, at 504.
  • the UE 115 may update the first control information 340a to indicate the source of the first message 306 in response to detecting that the first MAC-I 308 differs from the second MAC-I 330.
  • the method 500 further includes, based at least in part on the first control information, selecting a second base station for camping by the first service, at 506.
  • the UE 115 may select the base station 105b for camping by the first service 382a based on the first control information 340a.
  • the method 500 further includes updating second control information associated with a second service associated with the UE based on an indication of the source of the message, at 508.
  • the UE 115 may update the second control information 340b associated with the second service 382b based on the indication 390.
  • FIG. 6 is a block diagram illustrating an example of a UE 115 to perform base station reselection for multiple services in response to detection of a MAC-I mismatch condition according to some aspects of the disclosure.
  • the UE 115 may include one or more components described with reference to FIG. 2.
  • the UE 115 includes the controller/processor 280 and the memory 282.
  • the UE 115 under control of the controller/processor 280, transmits and receives signals via wireless radios 600a-r and the antennas 252a-r.
  • the wireless radios 600a-r may include one or more components of FIG.
  • the wireless radios 600a-r include or are coupled to the SIMs 380a-b.
  • the memory 282 is configured to store instructions executable by the controller/processor 280 to perform, initiate, or control one or more operations described herein. To illustrate, in FIG. 6, the memory 282 stores MAC-I computation instructions 601 executable by the controller/processor 280 to determine one or more MAC-I values, such as the second MAC-I 330 and the fourth MAC-I 332.
  • the memory 282 stores MAC-I comparison instructions 602 executable by the controller/processor 280 to compare MAC-I values (e.g., to detect a MAC-I match or a MAC-I mismatch) , such as to compare the first MAC-I 308 to the second MAC-I 330, to compare the third MAC-I 316 to the fourth MAC-I 332, or both.
  • MAC-I comparison instructions 602 executable by the controller/processor 280 to compare MAC-I values (e.g., to detect a MAC-I match or a MAC-I mismatch) , such as to compare the first MAC-I 308 to the second MAC-I 330, to compare the third MAC-I 316 to the fourth MAC-I 332, or both.
  • FIG. 6 also illustrates that the memory 282 may be configured to store list access instructions 603 executable by the controller/processor 280 to access the lists 342a-b (e.g., to search the lists 342a-b for the source indication 310, or for other indications of the base stations 105a-b) .
  • the memory 282 may be configured to store list update instructions 604 executable by the controller/processor 280 to update the lists 342a-b (e.g., to add the indications 344a-b) .
  • FIG. 6 also illustrates that the memory 282 may be configured to store list access instructions 603 executable by the controller/processor 280 to access the lists 342a-b (e.g., to search the lists 342a-b for the source indication 310, or for other indications of the base stations 105a-b) .
  • the memory 282 may be configured to store list update instructions 604 executable by the controller/processor 280 to update the lists 342a-b (e.g.
  • the memory 282 may store multi-service synchronization instructions 605 that may be executable by the controller/processor 280 to provide the indication 390 from the first SIM 380a (or from the first service 382a) to the second SIM 380b (or to the second service 382b) .
  • a method of wireless communication includes receiving a message by a UE during operation of the UE based on a first service associated with the UE.
  • the message indicates a first MAC-I and further indicates a first base station as a source of the message.
  • the method further includes, in response to detecting that the first MAC-I differs from a second MAC-I determined by the UE, updating first control information associated with the first service to indicate the source of the message.
  • the method further includes, based at least in part on the first control information, selecting a second base station for camping by the first service.
  • the method further includes updating second control information associated with a second service associated with the UE based on an indication of the source of the message.
  • the method further includes, during operation of the UE based on the second service, sending a request to camp with the second base station in response to the indication of the source of the message.
  • the method further includes, during operation of the UE based on the second service and in response to the indication of the source of the message, performing one or more attempts to determine a MAC-I match condition between the second service and the first base station.
  • the method further includes camping by the second service with the first base station in response to detecting the MAC-I match condition between the second service and the first base station.
  • the method further includes selecting the second base station for camping in response to failing to detect the MAC-I match condition between the second service and the first base station.
  • the method further includes, during operation of the UE based on the first service, initiating operation of a first counter associated with the first service in response to detecting that the second MAC-I differs from the first MAC-I, where the UE selects the second base station in response to detecting that a first value of the first counter satisfies a first threshold counter value.
  • the method further includes, during operation of the UE based on the second service: receiving a second message indicating a third MAC-I and further indicating the first base station as a source of the second message; in response to detecting that the third MAC-I differs from a fourth MAC-I determined by the UE, initiating operation of a second counter associated with the second service; and selecting the second base station for camping by the second service in response to detecting that a second value of the second counter satisfies a second threshold counter value.
  • the second threshold counter value corresponds to the first threshold counter value.
  • the second threshold counter value is different than the first threshold counter value.
  • the second base station is selected for camping by the first service prior to completion of a first instance of performing a MAC-I verification procedure with the first base station, and where the second base station is selected for camping by the second service prior to completion of a second instance of the MAC-I verification procedure with the first base station.
  • completion of the MAC-I verification procedure is associated with selection of a public land mobile network (PLMN) device for camping, and selecting the second base station prior to completion of the MAC-I verification procedure enables the UE to avoid selecting the PLMN device for camping.
  • PLMN public land mobile network
  • the method further includes detecting a trigger event and, in response to detecting the trigger event, deleting one or more entries of the first control information, from the second control information, or both.
  • detecting the trigger event includes detecting removal or insertion at the UE of a first SIM associated with the first service or a second SIM associated with the second service, where the first control information is deleted based on removal or insertion of the first SIM, and where the second control information is deleted based on removal or insertion of the second SIM.
  • detecting the trigger event includes detecting a power- cycle event of the UE, and the first control information and the second control information are deleted based on detecting the power-cycle event.
  • detecting the trigger event includes detecting that a value of a timer satisfies a threshold timer value, where the timer is associated with a particular base station corresponding to the one or more entries, and where the one or more entries are deleted based on detecting that the value of the timer satisfies the threshold timer value.
  • the UE includes a first SIM associated with the first service and a second SIM associated with the second service.
  • the first SIM provides the indication of the source of the message to the second SIM.
  • the first control information indicates a first list of first cells barred by the first service due to detecting MAC-I mismatch conditions associated with the first cells
  • the second control information indicates a second list of second cells barred by the second service due to detecting MAC-I mismatch conditions associated with the second cells.
  • the method further includes, during operation of the UE based on the first service: receiving a control message from the second base station; determining, based on the control message, that the second base station is a candidate for camping; and accessing the first control information to determine that the second base station is not indicated in a list of cells barred by the first service.
  • the method includes any combination of the first through nineteenth aspects.
  • an apparatus incudes a memory and one or more processors coupled to the memory.
  • the one or more processors are configured to receive a message during operation of a UE based on a first service associated with the UE.
  • the message indicates a first MAC-I and further indicates a first base station as a source of the message.
  • the one or more processors are further configured to update, in response to detecting that the first MAC-I differs from a second MAC-I determined by the UE, first control information associated with the first service to indicate the source of the message.
  • the one or more processors are further configured to select a second base station for camping by the first service based at least in part on the first control information.
  • the one or more processors are further configured to update second control information associated with a second service associated with the UE based on an indication of the source of the message.
  • an apparatus in a twenty-second aspect of the disclosure, includes means for receiving a message during operation of a UE based on a first service associated with the UE.
  • the message indicates a first MAC-I and further indicates a first base station as a source of the message.
  • the apparatus further includes means for updating first control information associated with the first service to indicate the source of the message in response to detecting that the first MAC-I differs from a second MAC-I determined by the UE.
  • the apparatus further includes means for selecting a second base station for camping by the first service based at least in part on the first control information and means for updating second control information associated with a second service associated with the UE based on an indication of the source of the message.
  • a non-transitory computer-readable medium stores instructions executable by a processor to perform operations.
  • the operations include receiving a message by a UE during operation of the UE based on a first service associated with the UE.
  • the message indicates a first MAC-I and further indicates a first base station as a source of the message.
  • the operations further include, in response to detecting that the first MAC-I differs from a second MAC-I determined by the UE, updating first control information associated with the first service to indicate the source of the message.
  • the operations further include selecting a second base station for camping by the first service and updating second control information associated with a second service associated with the UE based on an indication of the source of the message.
  • the functional blocks and modules described herein may comprise processors, electronics devices, hardware devices, electronics components, logical circuits, memories, software codes, firmware codes, etc., or any combination thereof.
  • features described herein may be implemented via specialized processor circuitry, via executable instructions, and/or combinations thereof.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices, e.g., 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.
  • a software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium.
  • the storage medium may be integral to the processor.
  • the processor and the storage medium may reside in an ASIC.
  • the ASIC may reside in a user terminal.
  • the processor and the storage medium may reside as discrete components in a user terminal.
  • the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium.
  • Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. Computer-readable storage media may be any available media that can be accessed by a general purpose or special purpose computer.
  • such computer-readable media can comprise 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 desired program code means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.
  • a connection may be properly termed a computer-readable medium.
  • the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, or digital subscriber line (DSL) , then the coaxial cable, fiber optic cable, twisted pair, or DSL, are included in the definition of medium.
  • DSL digital subscriber line
  • Disk and disc includes compact disc (CD) , laser disc, optical disc, digital versatile disc (DVD) , hard disk, solid state disk, and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.
  • the term “and/or, ” when used in a list of two or more items means that any one of the listed items can be employed by itself, or any combination of two or more of the listed items can be employed.
  • the composition can contain A alone; B alone; C alone; A and B in combination; A and C in combination; B and C in combination; or A, B, and C in combination.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Selon certains aspects, un procédé de communication sans fil consiste à recevoir un message au moyen d'un UE pendant le fonctionnement de l'UE d'après un premier service associé à l'UE. Le message indique un premier MAC-I et indique également une première station de base en tant que source du message. Le procédé consiste également, en réponse à la détection du fait que le premier MAC-I diffère d'un deuxième MAC-I déterminé par le dispositif UE, à mettre à jour les premières informations de commande associées au premier service pour indiquer la source du message. Le procédé consiste également, d'après au moins en partie les premières informations de commande, à sélectionner une seconde station de base pour la mise en attente par le premier service. Le procédé consiste également à mettre à jour des secondes informations de commande associées à un second service associé à l'UE d'après une indication de la source du message.
PCT/CN2020/089813 2020-05-12 2020-05-12 Resélection de station de base pour de multiples services d'un équipement utilisateur WO2021226832A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/089813 WO2021226832A1 (fr) 2020-05-12 2020-05-12 Resélection de station de base pour de multiples services d'un équipement utilisateur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/089813 WO2021226832A1 (fr) 2020-05-12 2020-05-12 Resélection de station de base pour de multiples services d'un équipement utilisateur

Publications (1)

Publication Number Publication Date
WO2021226832A1 true WO2021226832A1 (fr) 2021-11-18

Family

ID=78525612

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/089813 WO2021226832A1 (fr) 2020-05-12 2020-05-12 Resélection de station de base pour de multiples services d'un équipement utilisateur

Country Status (1)

Country Link
WO (1) WO2021226832A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011139187A1 (fr) * 2010-05-03 2011-11-10 Telefonaktiebolaget L M Ericsson (Publ) Procédés et dispositifs de rétablissement de canal de communications
WO2017171466A1 (fr) * 2016-04-01 2017-10-05 Samsung Electronics Co., Ltd. Procédé et appareil prenant en charge la récupération d'un contexte d'ue entre des stations de base
WO2020067959A1 (fr) * 2018-09-25 2020-04-02 Telefonaktiebolaget Lm Ericsson (Publ) Nœud de réseau radio, dispositif sans fil et procédés associés de rétablissement d'une connexion radio
WO2020091648A1 (fr) * 2018-10-30 2020-05-07 Telefonaktiebolaget Lm Ericsson (Publ) Signalement d'échec de protection d'intégrité pendant une reprise ou un rétablissement de connexion

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011139187A1 (fr) * 2010-05-03 2011-11-10 Telefonaktiebolaget L M Ericsson (Publ) Procédés et dispositifs de rétablissement de canal de communications
WO2017171466A1 (fr) * 2016-04-01 2017-10-05 Samsung Electronics Co., Ltd. Procédé et appareil prenant en charge la récupération d'un contexte d'ue entre des stations de base
WO2020067959A1 (fr) * 2018-09-25 2020-04-02 Telefonaktiebolaget Lm Ericsson (Publ) Nœud de réseau radio, dispositif sans fil et procédés associés de rétablissement d'une connexion radio
WO2020091648A1 (fr) * 2018-10-30 2020-05-07 Telefonaktiebolaget Lm Ericsson (Publ) Signalement d'échec de protection d'intégrité pendant une reprise ou un rétablissement de connexion

Similar Documents

Publication Publication Date Title
US11153793B2 (en) Reducing data latency when cellular access is barred
EP4000311B1 (fr) Techniques de transfert intercellulaire à configuration complète
US11101871B1 (en) Beam selection for multi-subscriber identity module (MSIM) devices
US20230292299A1 (en) History augmented synchronization signal based antenna beam selection
WO2021025805A1 (fr) Gestion de parasites dans des communications à ondes millimétriques
EP4104581A1 (fr) Sélection de port commun pour points de réception et de transmission multiples
US11115990B2 (en) UE autonomous beam selection
WO2021248505A1 (fr) Re-sélection de station de base à l'aide d'un rapport signal sur bruit
WO2021226832A1 (fr) Resélection de station de base pour de multiples services d'un équipement utilisateur
WO2021026908A1 (fr) Comportement d'équipement utilisateur sur l'obtention d'une nouvelle configuration de mesure précoce de radio
US20200281005A1 (en) Dynamic ue beam switching for mmwave measurements in asynchronous networks
WO2021189175A1 (fr) Resélection de station de base en réponse à la détection d'un état de défaut de correspondance de mac-i
WO2021237589A1 (fr) Procédé permettant d'accélérer un retour d'équipement utilisateur à la 5g à partir de la 4g
US11382057B2 (en) UE optimization to move between wireless communication networks based on SUCI support
WO2021237576A1 (fr) Récupération de service de réseau à partir de réseaux 5g (sa) anormaux pour un ue à double sim
WO2021243551A1 (fr) Techniques de transfert intercellulaire ou de redirection d'équipement d'utilisateur de 4g à 5g (sa)
WO2021159455A1 (fr) Réduction de latence de transfert de données pour un dispositif mobile
WO2021237566A1 (fr) Récupération de service de réseau à partir de réseaux 5g (sa) anormaux
WO2022056837A1 (fr) Amélioration de la performance d'un équipement utilisateur par planification et rapport de mesure intelligents
WO2021237610A1 (fr) Techniques de planification et de réception de données à faible puissance
US12010568B2 (en) Device performance when T312 configured
WO2022027429A1 (fr) Techniques multi-faisceau pour le transfert de faibles quantités de données sur des ressources de liaison montante préconfigurées
US20240147319A1 (en) Device performance when t312 configured
WO2022067834A1 (fr) Conception d'un intervalle de transmission de liaison latérale nr
WO2022056671A1 (fr) Techniques c-drx améliorées d'optimisation de latence et de puissance

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20935633

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20935633

Country of ref document: EP

Kind code of ref document: A1