WO2021232330A1 - Restauration d'un service de données de nouvelle radio pour des modules d'identité d'abonné doubles - Google Patents

Restauration d'un service de données de nouvelle radio pour des modules d'identité d'abonné doubles Download PDF

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Publication number
WO2021232330A1
WO2021232330A1 PCT/CN2020/091497 CN2020091497W WO2021232330A1 WO 2021232330 A1 WO2021232330 A1 WO 2021232330A1 CN 2020091497 W CN2020091497 W CN 2020091497W WO 2021232330 A1 WO2021232330 A1 WO 2021232330A1
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Prior art keywords
sim
cell
list
determining
ies
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PCT/CN2020/091497
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English (en)
Inventor
Tianya LIN
Jian Li
Hao Zhang
Chaofeng HUI
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Qualcomm Incorporated
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Priority to PCT/CN2020/091497 priority Critical patent/WO2021232330A1/fr
Publication of WO2021232330A1 publication Critical patent/WO2021232330A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/183—Processing at user equipment or user record carrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/02—Access restriction performed under specific conditions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/04—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration using triggered events
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H04W76/16—Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer
    • 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 generally relate to wireless communication and to techniques and apparatuses for restoring New Radio data service for dual subscriber identity modules.
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts.
  • Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, and/or the like) .
  • multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency-division multiple access (FDMA) systems, orthogonal frequency-division multiple access (OFDMA) systems, single-carrier frequency-division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE) .
  • LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
  • UMTS Universal Mobile Telecommunications System
  • a wireless communication network may include a number of base stations (BSs) that can support communication for a number of user equipment (UEs) .
  • a user equipment (UE) may communicate with a base station (BS) via the downlink and uplink.
  • the downlink (or forward link) refers to the communication link from the BS to the UE
  • the uplink (or reverse link) refers to the communication link from the UE to the BS.
  • a BS may be referred to as a Node B, a gNB, an access point, a radio head, a transmit receive point (TRP) , a New Radio (NR) BS, a 5G Node B, and/or the like.
  • New Radio which may also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
  • 3GPP Third Generation Partnership Project
  • NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL) , using CP-OFDM and/or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM) ) on the uplink (UL) , as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.
  • OFDM orthogonal frequency division multiplexing
  • SC-FDM e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)
  • DFT-s-OFDM discrete Fourier transform spread OFDM
  • MIMO multiple-input multiple-output
  • a method of wireless communication may include determining, for a first subscriber identity module (SIM) of the UE in a non-standalone (NSA) network, that the first SIM does not support one or more information elements (IEs) received in a reconfiguration message associated with adding a secondary cell group (SCG) with a first cell.
  • the method may include adding, for the first SIM, the first cell to a list of one or more cells to which service requests are barred, based at least in part on the determining that the first SIM does not support the one or more IEs.
  • the method may further include determining, for a second SIM of the UE, that a second cell is not on the list, and transmitting, for the second SIM, a service request to the second cell based at least in part on the determining that the second cell is not on the list.
  • a UE for wireless communication may include memory and one or more processors coupled to the memory.
  • the one or more processors may be operatively, electronically, communicatively, or otherwise coupled to the memory.
  • the memory may include instructions executable by the one or more processors to cause the UE to determine, for a first SIM of the UE in an NSA network, that the first SIM does not support one or more IEs received in a reconfiguration message associated with adding an SCG with a first cell, and add, for the first SIM, the first cell to a list of one or more cells to which service requests are barred, based at least in part on the determining that the first SIM does not support the one or more IEs.
  • the memory may include instructions executable by the one or more processors to cause the UE to determine, for a second SIM of the UE, that a second cell is not on the list, and transmit, for the second SIM, a service request to the second cell based at least in part on the determining that the second cell is not on the list.
  • an apparatus for wireless communication may include means for determining, for a first SIM of the apparatus in a non-standalone network, that the first SIM does not support one or more IEs received in a reconfiguration message associated with adding an SCG with a first cell, means for adding, for the first SIM, the first cell to a list of one or more cells to which service requests are barred, based at least in part on the determining that the first SIM does not support the one or more IEs, means for determining, for a second SIM of the apparatus, that a second cell is not on the list, and means for transmitting, for the second SIM, a service request to the second cell based at least in part on the determining that the second cell is not on the list.
  • aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, wireless communication device, and/or processing system as substantially described herein with reference to and as illustrated by the drawings and specification.
  • Fig. 1 is a block diagram conceptually illustrating an example of a wireless communication network, in accordance with various aspects of the present disclosure.
  • Fig. 2 is a block diagram conceptually illustrating an example of a base station in communication with a user equipment (UE) in a wireless communication network, in accordance with various aspects of the present disclosure.
  • UE user equipment
  • Fig. 3 is a diagram illustrating an example of restoring New Radio (NR) data service, in accordance with various aspects of the present disclosure.
  • Fig. 4 is a diagram illustrating an example of restoring NR data service for dual subscriber identity modules (SIMs) , in accordance with various aspects of the present disclosure.
  • SIMs subscriber identity modules
  • Fig. 5 is a diagram illustrating an example process performed, for example, by a UE, in accordance with various aspects of the present disclosure.
  • Fig. 1 is a diagram illustrating a wireless network 100 in which aspects of the present disclosure may be practiced.
  • the wireless network 100 may be an LTE network or some other wireless network, such as a 5G or NR network.
  • the wireless network 100 may include a number of BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities.
  • a BS is an entity that communicates with user equipment (UEs) and may also be referred to as a base station, an NR BS, a Node B, a gNB, a 5G node B (NB) , an access point, a transmit receive point (TRP) , and/or the like.
  • Each BS may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to a coverage area of a BS and/or a BS subsystem serving this coverage area, depending on the context in which the term is used.
  • a BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or another type of cell.
  • a macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription.
  • a pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription.
  • a femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs having association with the femto cell (e.g., UEs in a closed subscriber group (CSG) ) .
  • a BS for a macro cell may be referred to as a macro BS.
  • a BS for a pico cell may be referred to as a pico BS.
  • a BS for a femto cell may be referred to as a femto BS or a home BS.
  • a BS 110a may be a macro BS for a macro cell 102a
  • a BS 110b may be a pico BS for a pico cell 102b
  • a BS 110c may be a femto BS for a femto cell 102c.
  • a BS may support one or multiple (e.g., three) cells.
  • eNB base station
  • NR BS NR BS
  • gNB gNode B
  • AP AP
  • node B node B
  • 5G NB 5G NB
  • cell may be used interchangeably herein.
  • a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile BS.
  • the BSs may be interconnected to one another and/or to one or more other BSs or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces such as a direct physical connection, a virtual network, and/or the like using any suitable transport network.
  • Wireless network 100 may also include relay stations.
  • a relay station is an entity that can receive a transmission of data from an upstream station (e.g., a BS or a UE) and send a transmission of the data to a downstream station (e.g., a UE or a BS) .
  • a relay station may also be a UE that can relay transmissions for other UEs.
  • a relay station 110d may communicate with macro BS 110a and a UE 120d in order to facilitate communication between BS 110a and UE 120d.
  • a relay station may also be referred to as a relay BS, a relay base station, a relay, and/or the like.
  • Wireless network 100 may be a heterogeneous network that includes BSs of different types, e.g., macro BSs, pico BSs, femto BSs, relay BSs, and/or the like. These different types of BSs may have different transmit power levels, different coverage areas, and different impacts on interference in wireless network 100.
  • macro BSs may have a high transmit power level (e.g., 5 to 40 watts) whereas pico BSs, femto BSs, and relay BSs may have lower transmit power levels (e.g., 0.1 to 2 watts) .
  • a network controller 130 may couple to a set of BSs and may provide coordination and control for these BSs.
  • Network controller 130 may communicate with the BSs via a backhaul.
  • the BSs may also communicate with one another, e.g., directly or indirectly via a wireless or wireline backhaul.
  • UEs 120 may be dispersed throughout wireless network 100, and each UE may be stationary or mobile.
  • a UE may also be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, and/or the like.
  • a UE may be a cellular phone (e.g., a smart phone) , a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, biometric sensors/devices, wearable devices (smart watches, smart clothing, smart glasses, smart wrist bands, smart jewelry (e.g., smart ring, smart bracelet) ) , an entertainment device (e.g., a music or video device, or a satellite radio) , a vehicular component or sensor, smart meters/sensors, industrial manufacturing equipment, a global positioning system device, or any other suitable device that is configured to communicate via a wireless or wired medium.
  • PDA personal digital assistant
  • WLL wireless local loop
  • Some UEs may be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs.
  • MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, and/or the like, that may communicate with a base station, another device (e.g., remote device) , or some other entity.
  • a wireless node may provide, for example, connectivity for or to a network (e.g., a wide area network such as Internet or a cellular network) via a wired or wireless communication link.
  • Some UEs may be considered Internet-of-Things (IoT) devices, and/or may be implemented as NB-IoT (narrowband internet of things) devices.
  • IoT Internet-of-Things
  • NB-IoT narrowband internet of things
  • UE 120 may be included inside a housing that houses components of UE 120, such as processor components, memory components, and/or the like.
  • the processor components and the memory components may be coupled together.
  • the processor components e.g., one or more processors
  • the memory components e.g., a memory
  • the processor components and the memory components may be operatively coupled, communicatively coupled, electronically coupled, electrically coupled, and/or the like.
  • any number of wireless networks may be deployed in a given geographic area.
  • Each wireless network may support a particular radio access technology (RAT) and may operate on one or more frequencies.
  • a RAT may also be referred to as a radio technology, an air interface, and/or the like.
  • a frequency may also be referred to as a carrier, a frequency channel, and/or the like.
  • Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs.
  • NR or 5G RAT networks may be deployed.
  • two or more UEs 120 may communicate directly using one or more sidelink channels (e.g., without using a base station 110 as an intermediary to communicate with one another) .
  • the UEs 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (e.g., which may include a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure (V2I) protocol, and/or the like) , a mesh network, and/or the like.
  • V2X vehicle-to-everything
  • the UE 120 may perform scheduling operations, resource selection operations, and/or other operations described elsewhere herein as being performed by the base station 110.
  • Fig. 1 is provided as an example. Other examples may differ from what is described with regard to Fig. 1.
  • Fig. 2 shows a block diagram of a design 200 of base station 110 and UE 120, which may be one of the base stations and one of the UEs in Fig. 1.
  • Base station 110 may be equipped with T antennas 234a through 234t
  • UE 120 may be equipped with R antennas 252a through 252r, where in general T ⁇ 1 and R ⁇ 1.
  • a transmit processor 220 may receive data from a data source 212 for one or more UEs, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQIs) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS (s) selected for the UE, and provide data symbols for all UEs. Transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI) and/or the like) and control information (e.g., CQI requests, grants, upper layer signaling, and/or the like) and provide overhead symbols and control symbols.
  • MCS modulation and coding schemes
  • Transmit processor 220 may also generate reference symbols for reference signals (e.g., the cell-specific reference signal (CRS) ) and synchronization signals (e.g., the primary synchronization signal (PSS) and secondary synchronization signal (SSS) ) .
  • a transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and/or the reference symbols, if applicable, and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM and/or the like) to obtain an output sample stream.
  • TX transmit
  • MIMO multiple-input multiple-output
  • Each modulator 232 may process a respective output symbol stream (e.g., for OFDM and/or the like) to obtain an output sample stream.
  • Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal.
  • T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively.
  • the synchronization signals can be generated with location encoding to convey additional information.
  • antennas 252a through 252r may receive the downlink signals from base station 110 and/or other base stations 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 received signal to obtain input samples.
  • Each demodulator 254 may further process the input samples (e.g., for OFDM and/or the like) to obtain received symbols.
  • a MIMO detector 256 may obtain received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • a receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller/processor 280.
  • a channel processor may determine reference signal received power (RSRP) , received signal strength indicator (RSSI) , reference signal received quality (RSRQ) , channel quality indicator (CQI) , and/or the like.
  • RSRP reference signal received power
  • RSSI received signal strength indicator
  • RSRQ reference signal received quality
  • CQI channel quality indicator
  • one or more components of UE 120 may be included in a housing.
  • a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports comprising RSRP, RSSI, RSRQ, CQI, and/or the like) from controller/processor 280. Transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, and/or the like) , and transmitted to base station 110.
  • modulators 254a through 254r e.g., for DFT-s-OFDM, CP-OFDM, and/or the like
  • the uplink signals from UE 120 and other UEs may be received by antennas 234, processed by demodulators 232, detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by UE 120.
  • Receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to controller/processor 240.
  • Base station 110 may include communication unit 244 and communicate to network controller 130 via communication unit 244.
  • Network controller 130 may include communication unit 294, controller/processor 290, and memory 292.
  • Controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component (s) of Fig. 2 may perform one or more techniques associated with restoring NR data service for dual subscriber identity modules (SIMs) , as described in more detail elsewhere herein.
  • controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component (s) of Fig. 2 may perform or direct operations of, for example, process 500 of Fig. 5, and/or other processes as described herein.
  • Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively.
  • memory 242 and/or memory 282 may comprise a non-transitory computer-readable medium storing one or more instructions for wireless communication.
  • the one or more instructions when executed (e.g., directly, or after compiling, converting, interpreting, and/or the like) by one or more processors of the base station 110 and/or the UE 120, may perform or direct operations of, for example, process 500 of Fig. 5, and/or other processes as described herein.
  • executing instructions may include running the instructions, converting the instructions, compiling the instructions, interpreting the instructions, and/or the like.
  • a scheduler 246 may schedule UEs for data transmission on the downlink and/or uplink.
  • UE 120 may include means for determining, for a first SIM of UE 120 in a non-standalone network, that the first SIM does not support one or more information elements (IEs) received in a reconfiguration message associated with adding a secondary cell group (SCG) with a first cell, means for adding, for the first SIM, the first cell to a list of one or more cells to which service requests are barred, based at least in part on the determining that the first SIM does not support the one or more IEs, means for determining, for a second SIM of the apparatus, that a second cell is not on the list, means for transmitting, for the second SIM, a service request to the second cell based at least in part on the determining that the second cell is not on the list, and/or the like.
  • IEs information elements
  • such means may include one or more components of UE 120 described in connection with Fig. 2, such as controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, and/or the like.
  • Fig. 2 is provided as an example. Other examples may differ from what is described with regard to Fig. 2.
  • Fig. 3 is a diagram illustrating an example 300 of restoring NR data service, in accordance with various aspects of the present disclosure.
  • Fig. 3 shows a UE (e.g., UE 120 and or the like) that may attach to an LTE anchor cell, such as LTE Anchor Cell 1 shown in Fig. 3.
  • LTE anchor Cell such as LTE Anchor Cell 1 shown in Fig. 3.
  • the UE may transmit an attach request to Cell 1, indicating support for dual connectivity with NR (DCNR) .
  • DCNR dual connectivity with NR
  • the UE may receive an attach accept message.
  • the UE may attempt to access an NR data service, which involves adding an SCG. Accordingly, the UE may transmit a service request, as shown by reference number 315.
  • the UE may receive a radio resource control (RRC) reconfiguration message, indicating that an SCG is added, as shown by reference number 320.
  • RRC radio resource control
  • the message may include one or more unsupported IEs. If the UE does not support one or more IEs that apply to a feature that the first SIM is to use after adding the SCG, the UE may drop the SCG and lose the NR data service.
  • a UE data call may also be terminated.
  • the UE may repeat a procedure of transmitting a service request and receiving an RRC reconfiguration message associated with adding an SCG.
  • the data service may continue dropping, providing a bad user experience.
  • the UE may add the cell to a list of cells (e.g., NSA bar cell list) to which the UE is barred from transmitting service requests, as shown by reference number 330.
  • the UE may start a timer for the cell, as shown by reference number 335, and the cell may be removed from the list upon expiration of the timer. The UE may refrain from transmitting service requests to any cells on the list for the first SIM.
  • the UE may reselect to another LTE anchor cell, such as LTE Anchor Cell 2.
  • Cell 2 does not include unsupported IEs in a reconfiguration message.
  • the UE may perform a TAU procedure, indicating no support for DCNR, as shown by reference number 345.
  • the TAU procedure is a procedure applicable to LTE networks, and normally updates a location of the UE within an LTE network. If the NR cell and the LTE cell are maintained by the same operator, the UE does not need a new registration and a TAU procedure is sufficient to attach the UE to the LTE cell.
  • the UE may receive a TAU accept message.
  • the UE may transmit a service request to Cell 2, as shown by reference number 355.
  • the UE may receive an RRC reconfiguration message associated with adding the SCG, as shown by reference number 360.
  • the UE may transmit an RRC reconfiguration complete message back to Cell 2, as shown by reference number 365.
  • the UE may continue to use an LTE data service rather than an NR data service.
  • Fig. 3 is provided as an example. Other examples may differ from what is described with regard to Fig. 3.
  • Fig. 4 is a diagram illustrating an example 400 of restoring NR data service for dual SIMs, in accordance with various aspects of the present disclosure. While Fig. 3 shows a solution for a UE with one SIM, Fig. 4 shows a signaling diagram for a first SIM and a second SIM of a UE configured with a dual modem.
  • Either SIM may support dual SIM dual active or dual SIM dual standby, and either SIM may be associated with a default data subscriber (DDS) subscriber registration (e.g., NSA) or a non-DDS subscriber registration (e.g., LTE) .
  • DDS data subscriber
  • NSA non-DDS subscriber registration
  • the first SIM may register with an NSA network.
  • the NSA network may involve the infrastructure of an LTE network that provides access to the Internet.
  • the second SIM may also register with the NSA network or an LTE network. While actions may be described herein as being performed by the first SIM or the second SIM, this includes the UE performing the action for the first SIM or for the second SIM. In some cases, an application protocol/application processor (AP) of the UE may direct switching between the first SIM and the second SIM or other operations.
  • AP application protocol/application processor
  • the first SIM may be attached to a cell that may be an NSA cell, an LTE cell, an NR cell, and/or the like.
  • the cell is shown as LTE Cell 1
  • the first SIM may attach to Cell 1 with an indication of DCNR support, as described in connection with Fig. 3.
  • the first SIM may receive an RRC reconfiguration message, indicating that an SCG is added, but the RRC reconfiguration message may include one or more unsupported IEs and the SCG may drop.
  • the first SIM (or the UE for the first SIM) may add Cell 1 to a list of barred cells and reselect to Cell 2.
  • the second SIM may also have problems with accessing the NR data service.
  • the second SIM may also have the SCG dropped after transmitting a service request, due to an RRC reconfiguration message including unsupported IEs.
  • both the first SIM and the second SIM may lose data service.
  • the UE may recognize the problem with Cell 1 for the first SIM and cause the first SIM to reselect to Cell 2, but the second SIM may be unaware of the problem.
  • the second SIM may cause the UE to waste time, power, processing resources, and signaling resources transmitting a service request and losing the SCG due to unsupported IEs in an RRC reconfiguration message.
  • the first SIM may add Cell 1 to a list of cells to which the first SIM is barred from transmitting service requests to add the SCG, and signal to the second SIM that Cell 1 is added to the list for the first SIM, as shown by reference number 405.
  • the second SIM may add Cell 1 to a bar cell list for the second SIM. In this way, the second SIM (or the UE for the second SIM) may proceed with reselecting to another cell rather than seek an NR data service with Cell 1, which is on the bar cell list.
  • the second SIM may help the UE to save the time, power, processing resources, and signaling resources involved with losing an SCG, detecting unsupported IEs, and reselecting to another cell after the SCG drops.
  • the second SIM may also signal bar cell list information to the first SIM.
  • the first SIM and the second SIM may each have bar cell lists that are synchronized. Alternatively, or additionally, the first SIM and the second SIM may access the same bar cell list.
  • the UE, for the first SIM may detect particular IEs in the RRC reconfiguration message that apply to a feature that the first SIM is to use. For example, in some aspects, there may be one or more IEs that the first SIM does not support, but these IEs may not be an issue if the first SIM is not going to use them in a feature to maintain or use the NR data service. However, there may be a feature that the first SIM is to rely on for a communication or service, and the feature may be associated with one or more IEs that the first SIM does not support. If the first SIM proceeds with the communication or service, the communication or service will fail because information obtained in one or more IEs may be required for the communication or service. If the first SIM does not support the one or more IEs, the first SIM cannot obtain any necessary information for the communication or service.
  • the AP of the UE may switch from the first SIM to the second SIM, as shown by reference number 415.
  • the UE may determine, for the second SIM, whether Cell 1 (or any other cell) is on a bar cell list before transmitting a service request to Cell 1 to add an SCG. If Cell 1 is on the bar cell list, the second SIM (or the UE for the second SIM) may transmit a service request to Cell 2 (which is not on the bar cell list) , as shown by reference number 420.
  • this includes performing a TAU procedure indicating support for DCNR.
  • the UE, for the second SIM may transmit a TAU request (indicating support for DCNR) to Cell 2 and receive a TAU accept message.
  • the second SIM may receive an RRC reconfiguration message associated with adding the SCG, as shown by reference number 425.
  • the second SIM (or the UE for the second SIM) may transmit an RRC reconfiguration complete message to Cell 2.
  • the second SIM may not cause the UE to obtain an NR data service rather drop a data service or a data call.
  • reselecting to Cell 2 may include transmitting an attach message.
  • the UE may remove, for the first SIM and/or the second SIM, a cell from the list based at least in part on expiration of a timer, an instruction from the base station, or removal of the first SIM and/or the second SIM.
  • the first SIM and the second SIM may avoid SCG drops (and drops in data service altogether) .
  • Fig. 4 is provided as an example. Other examples may differ from what is described with respect to Fig. 4.
  • Fig. 5 is a diagram illustrating an example process 500 performed, for example, by a UE, in accordance with various aspects of the present disclosure.
  • Example process 500 is an example where the UE (e.g., a UE 120 depicted in Figs. 1 and 2, the UE depicted in Figs. 3 and 4, and/or the like) performs operations associated with restoring NR data service for dual SIMs.
  • the UE e.g., a UE 120 depicted in Figs. 1 and 2, the UE depicted in Figs. 3 and 4, and/or the like
  • process 500 may include determining, for a first SIM of the UE in an NSA network, that the first SIM does not support one or more IEs received in a reconfiguration message associated with adding an SCG with a first cell (block 510) .
  • the UE e.g., using receive processor 258, transmit processor 264, controller/processor 280, memory 282, and/or the like
  • process 500 may include adding, for the first SIM, the first cell to a list of one or more cells to which service requests are barred, based at least in part on the determining that the first SIM does not support the one or more IEs (block 520) .
  • the UE e.g., using receive processor 258, transmit processor 264, controller/processor 280, memory 282, and/or the like
  • process 500 may include determining, for a second SIM of the UE, that a second cell is not on the list (block 530) .
  • the UE e.g., using receive processor 258, transmit processor 264, controller/processor 280, memory 282, and/or the like
  • process 500 may include transmitting, for the second SIM, a service request to the second cell based at least in part on the determining that the second cell is not on the list (block 540) .
  • the UE e.g., using receive processor 258, transmit processor 264, controller/processor 280, memory 282, and/or the like
  • Process 500 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.
  • process 500 includes causing the first SIM and the second SIM to share the list with each other.
  • the one or more IEs that the first SIM does not support apply to a feature that the first SIM is to use after adding the SCG.
  • process 500 includes, prior to transmitting the service request to the second cell, transmitting, to the second cell, a TAU request that indicates support for DCNR.
  • process 500 includes receiving an instruction to remove the first cell from the list; and removing the first cell from the list.
  • process 500 includes removing the first cell from the list after a specified amount of time has passed for the first cell being on the list.
  • process 500 includes starting, based at least in part on the adding the first cell to the list, a timer that indicates a specified amount of time that the first cell is to remain on the list.
  • process 500 includes removing all cells from the list based at least in part on one of the UE powering off or removal of one or more of the first SIM or the second SIM from the UE.
  • process 500 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 5. Additionally, or alternatively, two or more of the blocks of process 500 may be performed in parallel.
  • the term “component” is intended to be broadly construed as hardware, software, and/or a combination of hardware and software.
  • a processor is implemented in hardware, software, and/or a combination of hardware and software.
  • Software is to be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and/or the like, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
  • satisfying a threshold may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, and/or the like.
  • “at least one of: a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c) .
  • the terms “has, ” “have, ” “having, ” and/or the like are intended to be open-ended terms. Further, the phrase “based on” is intended to mean “based, at least in part, on” unless explicitly stated otherwise.

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

Abstract

D'une manière générale, divers aspects de la présente divulgation concernent la communication sans fil. Selon certains aspects, un équipement utilisateur (UE) peut déterminer, pour un premier module d'identité d'abonné (SIM) de l'UE, que le premier SIM ne prend pas en charge des éléments d'informations (IE) reçus dans un message de reconfiguration associé à l'ajout d'un groupe de cellules secondaires (SCG) avec une première cellule. L'UE peut ajouter, pour le premier SIM, la première cellule à une liste de cellules auxquelles les demandes de service sont bloquées, sur la base, au moins en partie, de la détermination du fait que le premier SIM ne prend pas en charge les IE; déterminer, pour un second SIM de l'UE, qu'une seconde cellule n'est pas sur la liste; et transmettre, pour le second SIM, une demande de service à la seconde cellule sur la base, au moins en partie, de la détermination du fait que la seconde cellule n'est pas sur la liste. La divulgation concerne également de nombreux autres aspects.
PCT/CN2020/091497 2020-05-21 2020-05-21 Restauration d'un service de données de nouvelle radio pour des modules d'identité d'abonné doubles WO2021232330A1 (fr)

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