WO2021232174A1 - Techniques d'enregistrement de réseau pour de multiples abonnements - Google Patents

Techniques d'enregistrement de réseau pour de multiples abonnements Download PDF

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Publication number
WO2021232174A1
WO2021232174A1 PCT/CN2020/090713 CN2020090713W WO2021232174A1 WO 2021232174 A1 WO2021232174 A1 WO 2021232174A1 CN 2020090713 W CN2020090713 W CN 2020090713W WO 2021232174 A1 WO2021232174 A1 WO 2021232174A1
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WIPO (PCT)
Prior art keywords
subscription
request
mode
plmn
registration
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PCT/CN2020/090713
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English (en)
Inventor
Tianya LIN
Hao Zhang
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Qualcomm Incorporated
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Priority to PCT/CN2020/090713 priority Critical patent/WO2021232174A1/fr
Publication of WO2021232174A1 publication Critical patent/WO2021232174A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/005—Multiple registrations, e.g. multihoming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/18—Management of setup rejection or failure
    • 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

Definitions

  • aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for network registration for devices capable of multiple simultaneous subscriptions.
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcasts, etc. These wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (for example, bandwidth, transmit power, etc. ) .
  • multiple-access systems include 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems, LTE Advanced (LTE-A) systems, code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems, to name a few.
  • 3GPP 3rd Generation Partnership Project
  • LTE Long Term Evolution
  • LTE-A LTE Advanced
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency division
  • New radio for example, 5G NR
  • 5G NR is an example of an emerging telecommunication standard.
  • NR is a set of enhancements to the LTE mobile standard promulgated by 3GPP.
  • 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 OFDMA with a cyclic prefix (CP) on the downlink (DL) and on the uplink (UL) .
  • CP cyclic prefix
  • NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.
  • MIMO multiple-input multiple-output
  • 5G networks can be implemented in accordance with standalone (SA) or non-standalone (NSA) architectures.
  • the 5G SA architecture includes a 5G core (5GC) and one or more base stations configured for 5G NR (such as gNBs) to provide 5G services to a user equipment (UE) .
  • the 5GC provides native support for many of the improvements associated with 5G NR technology such as, for example, ultra-reliable low-latency communication (URLLC) , network function virtualization (NFV) , network slicing, control and user plane separation (CUPS) , and multi-gigabit connectivity, among other examples.
  • URLLC ultra-reliable low-latency communication
  • NFV network function virtualization
  • CUPS control and user plane separation
  • multi-gigabit connectivity among other examples.
  • the 5G NSA architecture includes an evolved packet core (EPC) and a combination of base stations configured for 4G LTE and base stations configured for 5G NR (such as eNBs and gNBs, respectively) to provide 5G services to a UE.
  • EPC evolved packet core
  • 5G NR such as eNBs and gNBs, respectively
  • wireless networks implementing the 5G NSA architecture may support some of the improvements associated with 5G NR technology such as, for example, enhanced mobile broadband (eMBB) .
  • eMBB enhanced mobile broadband
  • a UE may include or support multiple subscriber identity modules (SIMs) .
  • SIMs subscriber identity modules
  • a UE may be a dual-SIM dual-standby (DSDS) or dual-SIM dual-active (DSDA) capable UE.
  • a DSDS capable UE has two SIM cards, but only a single radio transceiver for supporting both SIM cards. As such, only one of the SIM cards may be active at any given time. For example, the UE may be able to receive signaling on one of the SIM cards at any point in time.
  • a DSDA capable UE includes a separate transceiver for each of the SIM cards, and as such, both SIM cards may be active simultaneously. As result, signaling may be received for one SIM card while communication is ongoing for another SIM card.
  • the method generally includes transmitting, to a first base station via a first subscription associated with a first subscriber identity module (SIM) of the UE, a first request for registration with a first radio-access technology (RAT) , receiving, from the first base station, a rejection of the first request via the first subscription of the UE, and disabling a standalone (SA) mode of operation for a second subscription associated with a second SIM of the UE based on the rejection of the first request.
  • SIM subscriber identity module
  • RAT radio-access technology
  • the apparatus generally includes a memory, and one or more processors, the memory and the one or more processors being configured to transmit, to a first base station via a first subscription associated with a first subscriber identity module (SIM) of the UE, a first request for registration with a first radio-access technology (RAT) , receive, from the first base station, a rejection of the first request via the first subscription of the UE, and disable a standalone (SA) mode of operation for a second subscription associated with a second SIM of the UE based on the rejection of the first request.
  • SIM subscriber identity module
  • RAT radio-access technology
  • the apparatus generally includes means for transmitting, to a first base station via a first subscription associated with a first subscriber identity module (SIM) of the UE, a first request for registration with a first radio-access technology (RAT) , means for receiving, from the first base station, a rejection of the first request via the first subscription of the UE, and means for disabling a standalone (SA) mode of operation for a second subscription associated with a second SIM of the UE based on the rejection of the first request.
  • SIM subscriber identity module
  • RAT radio-access technology
  • aspects of the present disclosure provide means for, apparatus, processors, and computer-readable mediums for performing the methods described herein.
  • the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims.
  • the following description and the appended drawings set forth in detail some illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed.
  • Figure 1 is a block diagram conceptually illustrating an example telecommunications system, in accordance with some aspects of the present disclosure.
  • FIG. 2 is a block diagram conceptually illustrating an example base station (BS) and user equipment (UE) , in accordance with some aspects of the present disclosure.
  • BS base station
  • UE user equipment
  • FIG. 3 is a block diagram of a dual subscriber identify module (SIM) dual active (DSDA) device that supports network registration for multiple simultaneous subscriptions, in accordance with some aspects of the present disclosure.
  • SIM subscriber identify module
  • DSDA dual active
  • Figure 4 shows a flowchart illustrating an example process for wireless communication that supports network registration for devices capable of multiple simultaneous subscriptions, in accordance with some aspects of the present disclosure.
  • Figure 5 is a call flow diagram illustrating example process for network registration that supports network registration for devices capable of multiple simultaneous subscriptions, in accordance with some aspects of the present disclosure.
  • Figure 6 illustrates a communications device that includes various components configured to perform operations that support network registration for devices capable of multiple simultaneous subscriptions in accordance with aspects of the present disclosure.
  • the 5G SA architecture includes a 5G core (5GC) and one or more base stations configured for 5G new radio (NR) (such as gNBs) to provide 5G services to a user equipment (UE) .
  • NR new radio
  • the 5GC provides native support for many of the improvements associated with 5G NR technology such as, for example, ultra-reliable low-latency communication (URLLC) , network function virtualization (NFV) , network slicing, control and user plane separation (CUPS) , and multi-gigabit connectivity, among other examples.
  • URLLC ultra-reliable low-latency communication
  • NFV network function virtualization
  • CUPS control and user plane separation
  • multi-gigabit connectivity among other examples.
  • the 5G NSA architecture includes an evolved packet core (EPC) and a combination of base stations configured for 4G LTE and base stations configured for 5G NR (such as eNBs and gNBs, respectively) to provide 5G services to a UE.
  • EPC evolved packet core
  • 5G NR such as eNBs and gNBs, respectively
  • LTE long-term evolution
  • wireless networks implementing the 5G NSA architecture may support some of the improvements associated with 5G NR technology such as, for example, enhanced mobile broadband (eMBB) .
  • eMBB enhanced mobile broadband
  • a user-equipment may include or support multiple subscriber identity modules (SIMs) .
  • SIMs subscriber identity modules
  • Some multi-SIM UEs may be operable in a dual-SIM dual-active (DSDA) configuration or a dual-SIM dual-standby (DSDS) configuration.
  • DSDA dual-SIM dual-active
  • DSDS dual-SIM dual-standby
  • each of the SIMs may be associated with a different wireless radio (or allocated a different set of radio resources) that may operate independently of the other.
  • one SIM may use one wireless radio to wirelessly transmit a communication while the other SIM uses the other wireless radio to wirelessly receive a communication.
  • multiple SIMS may be associated with the same wireless radio (or allocated the same set of radio resources) .
  • only one of the SIMs may be active at any given time.
  • two SIMs of a multi-SIM UE may be registered to the same 5G standalone (SA) network.
  • SA 5G standalone
  • a UE may transmit a request to register with a 5G SA network while in an SA mode of operation, but receive a rejection of the request for registration. In response to the rejection, the UE may disable the SA mode of operation, and may then attempt registration with a LTE network to obtain 5G services while operating in an NSA mode of operation. In some aspects of the present disclosure, the UE may disable the SA mode of operation for the multiple subscriptions that are supported by the UE.
  • the UE may also receive a rejection of registration for a second subscription, such as when each of the subscriptions of the UE is associated with the same operator.
  • the UE may take one or more actions to disable an SA mode of operation for the second subscription in response to receiving a rejection of registration for the first subscription.
  • the UE may add a public land mobile network (PLMN) identifier (ID) associated with the rejection from the network to a list of forbidden PLMNs of each subscription, and change from an SA mode of operation to an NSA mode of operation, allowing the UE to obtain service in the NSA mode or LTE mode.
  • PLMN public land mobile network
  • ID a public land mobile network identifier
  • the UE may keep a list of forbidden PLMNs for each of the subscriptions of the UE, each list indicating PLMNs that the UE is to refrain from transmitting requests for registration while operating in SA mode.
  • the UE may add the PLMN associated with the rejection from the network to the lists of forbidden PLMNs for the multiple subscriptions of the UE, in effect preventing (or at least reducing the likelihood of) repeated failed attempts for registration with the network for the subscriptions.
  • the described techniques can be used to improve network registration efficiency by preventing (or at least reduce the likelihood of) packet switched (PS) service from being disabled at the UE due to repeated failed attempts for registration with a network. Preventing repeated failed attempts for registration also reduces power consumption of the UE, and facilitates obtaining PS service faster for the user.
  • PS packet switched
  • the UE may attempt to register with the network multiple times and receive rejections for the registration attempts. Eventually, the UE may disable PS service. If the UE disables PS service for a particular SIM, the UE may consider the SIM as invalid for 5G system (5GS) services until switching off or the universal integrated circuit card (UICC) containing the SIM is removed.
  • the SIM may be revalidated in some cases, but because the network (NW) may repeatedly respond to the UE indicating that 5GS service is not allowed, the UE may disable PS service, resulting in the UE being unable to obtain service in SA mode, NSA mode, or even obtain service on an long-term evaluation (LTE) network entity.
  • 5GS 5G system
  • UICC universal integrated circuit card
  • the UE may continue operating in SA mode and reattempt to register with the 5G network, and after a number of attempts have been made, may disable PS service resulting in customer dissatisfaction.
  • the UE in effect prevents PS service from being disabled at the UE and facilitates PS service to be obtained using NSA mode of operation.
  • 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.
  • RAT may also be referred to as a radio technology, an air interface, etc.
  • a frequency may also be referred to as a carrier, a subcarrier, a frequency channel, a tone, a subband, etc.
  • Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs.
  • the techniques described herein may be used for various wireless networks and radio technologies. While aspects may be described herein using terminology commonly associated with 3G, 4G, and/or new radio (for example, 5G NR) wireless technologies, aspects of the present disclosure can be applied in other generation-based communication systems.
  • NR access may support various wireless communication services, such as enhanced mobile broadband (eMBB) targeting wide bandwidth (for example, 80 MHz or beyond) , millimeter wave (mmW) targeting high carrier frequency (for example, 25 GHz or beyond) , massive machine type communications MTC (mMTC) targeting non-backward compatible MTC techniques, and/or mission critical targeting ultra-reliable low-latency communications (URLLC) .
  • eMBB enhanced mobile broadband
  • mmW millimeter wave
  • mMTC massive machine type communications MTC
  • URLLC ultra-reliable low-latency communications
  • These services may include latency and reliability requirements.
  • These services may also have different transmission time intervals (TTI) to meet respective quality of service (QoS) requirements.
  • TTI transmission time intervals
  • QoS quality of service
  • these services may co-exist in the same subframe.
  • NR supports beamforming and beam direction may be dynamically configured. MIMO transmissions with precoding may also be supported.
  • MIMO configurations in the DL may support up to 8 transmit antennas with multi-layer DL transmissions up to 8 streams and up to 2 streams per UE. Multi-layer transmissions with up to 2 streams per UE may be supported. Aggregation of multiple cells may be supported with up to 8 serving cells.
  • Figure 1 illustrates an example wireless communication network 100 in which aspects of the present disclosure may be performed.
  • the wireless communication network 100 may be an NR system (for example, a 5G NR network) .
  • the wireless communication network 100 may be in communication with a core network 132.
  • the core network 132 may in communication with one or more base station (BSs) 110 and/or user equipment (UE) 120 in the wireless communication network 100 via one or more interfaces.
  • BSs base station
  • UE user equipment
  • the wireless communication network 100 may include a number of BSs 110a-z (each also individually referred to herein as BS 110 or collectively as BSs 110) and other network entities.
  • a BS 110 may provide communication coverage for a particular geographic area, sometimes referred to as a “cell” , which may be stationary or may move according to the location of a mobile BS 110.
  • the BSs 110 may be interconnected to one another and/or to one or more other BSs or network nodes (not shown) in wireless communication network 100 through various types of backhaul interfaces (for example, a direct physical connection, a wireless connection, a virtual network, or the like) using any suitable transport network.
  • the BSs 110a, 110b and 110c may be macro BSs for the macro cells 102a, 102b and 102c, respectively.
  • the BS 110x may be a pico BS for a pico cell 102x.
  • the BSs 110y and 110z may be femto BSs for the femto cells 102y and 102z, respectively.
  • a BS may support one or multiple cells.
  • a network controller 130 may couple to a set of BSs 110 and provide coordination and control for these BSs 110 (for example, via a backhaul) .
  • the BSs 110 communicate with UEs 120a-y (each also individually referred to herein as UE 120 or collectively as UEs 120) in the wireless communication network 100.
  • the UEs 120 (for example, 120x, 120y, etc. ) may be dispersed throughout the wireless communication network 100, and each UE 120 may be stationary or mobile.
  • Wireless communication network 100 may also include relay stations (for example, relay station 110r) , also referred to as relays or the like, that receive a transmission of data and/or other information from an upstream station (for example, a BS 110a or a UE 120r) and sends a transmission of the data and/or other information to a downstream station (for example, a UE 120 or a BS 110) , or that relays transmissions between UEs 120, to facilitate communication between devices.
  • relay stations for example, relay station 110r
  • relays or the like that receive a transmission of data and/or other information from an upstream station (for example, a BS 110a or a UE 120r) and sends a transmission of the data and/or other information to a downstream station (for example, a UE 120 or a BS 110) , or that relays transmissions between UEs 120, to facilitate communication between devices.
  • the BSs 110 and UEs 120 may be configured for network registration.
  • the UE 120a includes a registration manager 122.
  • the registration manager 122 may be configured to transmit a request for registration with a first RAT, receive a rejection of the request, and disable a standalone (SA) mode of operation at the UE in response to the rejection of the request.
  • the UE may support multiple subscriber identify modules (SIMs) , and the UE may disable the SA mode of operation for multiple SIMs of the UE.
  • SIMs subscriber identify modules
  • Figure 2 illustrates example components of BS 110a and UE 120a (for example, in the wireless communication network 100 of Figure 1) , which may be used to implement aspects of the present disclosure.
  • a transmit processor 220 may receive data from a data source 212 and control information from a controller/processor 240.
  • the control information may be for the physical broadcast channel (PBCH) , physical control format indicator channel (PCFICH) , physical hybrid ARQ indicator channel (PHICH) , physical downlink control channel (PDCCH) , group common PDCCH (GC PDCCH) , etc.
  • the data may be for the physical downlink shared channel (PDSCH) , etc.
  • a medium access control (MAC) -control element (MAC-CE) is a MAC layer communication structure that may be used for control command exchange between wireless nodes.
  • the MAC-CE may be carried in a shared channel such as a physical downlink shared channel (PDSCH) , a physical uplink shared channel (PUSCH) , or a physical sidelink shared channel (PSSCH) .
  • PDSCH physical downlink shared channel
  • PUSCH physical uplink shared channel
  • PSSCH physical sidelink shared channel
  • the processor 220 may process (for example, encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively.
  • the transmit processor 220 may also generate reference symbols, such as for the primary synchronization signal (PSS) , secondary synchronization signal (SSS) , and channel state information reference signal (CSI-RS) .
  • a transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (for example, precoding) on the data symbols, the control symbols, and/or the reference symbols, if applicable, and may provide output symbol streams to the modulators (MODs) 232a-232t. Each modulator 232 may process a respective output symbol stream (for example, for OFDM, etc. ) to obtain an output sample stream.
  • Each modulator may further process (for example, convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal.
  • Downlink signals from modulators 232a-232t may be transmitted via the antennas 234a-234t, respectively.
  • the antennas 252a-252r may receive the downlink signals from the BS 110a and may provide received signals to the demodulators (DEMODs) in transceivers 254a-254r, respectively.
  • Each demodulator 254 may condition (for example, filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples.
  • Each demodulator may further process the input samples (for example, for OFDM, etc. ) to obtain received symbols.
  • a MIMO detector 256 may obtain received symbols from all the demodulators 254a-254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • a receive processor 258 may process (for example, demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 120a to a data sink 260, and provide decoded control information to a controller/processor 280.
  • a transmit processor 264 may receive and process data (for example, for the physical uplink shared channel (PUSCH) ) from a data source 262 and control information (for example, for the physical uplink control channel (PUCCH) from the controller/processor 280.
  • the transmit processor 264 may also generate reference symbols for a reference signal (for example, for the sounding reference signal (SRS) ) .
  • the symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by the modulators in transceivers 254a-254r (for example, for SC-FDM, etc. ) , and transmitted to the BS 110a.
  • the uplink signals from the UE 120a may be received by the antennas 234, processed by the modulators 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 the UE 120a.
  • the receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to the controller/processor 240.
  • the memories 242 and 282 may store data and program codes for BS 110a and UE 120a, respectively.
  • a scheduler 244 may schedule UEs for data transmission on the downlink and/or uplink.
  • Antennas 252, processors 266, 258, 264, and/or controller/processor 280 of the UE 120a and/or antennas 234, processors 220, 230, 238, and/or controller/processor 240 of the BS 110a may be used to perform the various techniques and methods described herein.
  • the controller/processor 280 of the UE 120a has a registration manager 281 that may be configured to transmit a request for registration with a first RAT, receive a rejection of the request, and disable a standalone (SA) mode of operation at the UE in response to the rejection of the request, according to aspects described herein.
  • SA standalone
  • the UE may support multiple subscriber identify modules (SIMs) , and the UE may disable the SA mode of operation for multiple SIMs of the UE.
  • SIMs subscriber identify modules
  • the controller/processor other components of the UE 120a and BS 110a may be used to perform the operations described herein.
  • NR may utilize orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) on the uplink and downlink.
  • OFDM orthogonal frequency division multiplexing
  • CP cyclic prefix
  • NR may support half-duplex operation using time division duplexing (TDD) .
  • OFDM and single-carrier frequency division multiplexing (SC-FDM) partition the system bandwidth into multiple orthogonal subcarriers, which are also commonly referred to as tones, bins, etc. Each subcarrier may be modulated with data. Modulation symbols may be sent in the frequency domain with OFDM and in the time domain with SC-FDM.
  • the spacing between adjacent subcarriers may be fixed, and the total number of subcarriers may be dependent on the system bandwidth.
  • the minimum resource allocation may be 12 consecutive subcarriers.
  • the system bandwidth may also be partitioned into subbands.
  • a subband may cover multiple RBs.
  • NR may support a base subcarrier spacing (SCS) of 15 KHz and other SCS may be defined with respect to the base SCS (for example, 30 kHz, 60 kHz, 120 kHz, 240 kHz, etc. ) .
  • SCS base subcarrier spacing
  • FIG. 3 is a block diagram of a dual-subscriber identify module (SIM) device 300 that supports network registration for multiple simultaneous subscriptions, in accordance with some aspects of the present disclosure.
  • the dual-SIM device 300 may include a first SIM interface 302a, which may receive a first SIM 304a that is associated with a first subscription for service.
  • the dual-SIM device 300 may also include a second SIM interface 302b, which may receive a second SIM 304b that is associated with a second subscription for service. While the Figure 3 describes a dual-SIM device to facilitate understanding, the aspects described herein are applicable to a device capable of supporting any number of SIMs greater than 1.
  • a Universal Integrated Circuit Card may be configured with a SIM or universal SIM (USIM) applications, enabling access to networks.
  • the UICC may also provide storage for a phone book and other applications.
  • a SIM used in the various aspects may contain user account information, an international mobile subscriber identity (IMSI) , a set of SIM application toolkit (SAT) commands and storage space for phone book contacts.
  • IMSI international mobile subscriber identity
  • SAT SIM application toolkit
  • a SIM may further store a Home Public-Land-Mobile-Network (HPLMN) code to indicate the SIM card network operator provider.
  • HPLMN Home Public-Land-Mobile-Network
  • the dual-SIM device 300 may include at least one controller, such as a general processor 306.
  • the general processor 306 may be coupled to at least one memory 314.
  • Memory 314 may be a non-transitory tangible computer readable storage medium that stores processor-executable instructions.
  • the instructions may include routing communication data relating to subscriptions through a corresponding baseband to radio-frequency (RF) chain.
  • the memory 214 may store operating system (OS) , as well as user application software and executable instructions.
  • OS operating system
  • the general processor 306 and memory 314 may each be coupled to at least one baseband processor 316.
  • the dual-SIM device 300 may be implemented as a dual-SIM dual-standby (DSDS) device.
  • the dual-SIM device 300 may include a single RF chain (for example, RF chain 318a) for both SIMs.
  • the dual-SIM device 300 may be implemented as a dual-SIM dual-active (DSDA) device.
  • each SIM in the dual-SIM device 300 (for example, SIM 202a and SIM 202b) may be associated with an RF chain (for example, RF chain 318a and RF chain 318b) .
  • Each RF chain may include one or more amplifiers and radios.
  • RF chains may interact with a shared baseband processor 316 (in other words, a single device that performs baseband/modem functions for all SIMs on the wireless device) .
  • each baseband to RF chain may include physically or logically separate baseband (BB) processors (for example, BB1, BB2) .
  • the baseband processor 316 may be an integrated chip capable of managing the protocol stacks (PSs) of each of the SIMs or subscriptions (for example, PS1, PS2) .
  • PSs protocol stacks
  • RF chains 318a, 318b may each be communication circuits or transceivers that perform transmit (TX) and receive (RX) functions for an associated SIM.
  • the RF chains 318a, 318b may be coupled to at least one first wireless antenna 320a and at least one second wireless antenna 320b.
  • a UE may receive, from the network (NW) , a rejection of registration for service on a NR5G NW.
  • the rejection by the network may indicate that 5G system (5GS) service is not allowed (for example, cause #7) .
  • the UE may disable SA mode, for the multiple SIMs and associated subscriptions, after receiving the network rejection indicating that that NR5G is not allowed. In this manner, the UE may attempt to register with the network using NSA mode via a different RAT such as LTE.
  • FIG. 4 shows a flowchart illustrating an example process 400 for wireless communication that supports network registration for devices capable of multiple simultaneous subscriptions, in accordance with some aspects of the present disclosure.
  • the operations of the process 400 may be performed, for example, by a UE (for example, such as a UE 120a in the wireless communication network 100) .
  • the UE may support multiple simultaneous subscriptions, and may perform network registration for one subscription by taking into account prior network registration results for another subscription of the UE.
  • Process 400 may be implemented as software components that are executed and run on one or more processors (for example, controller/processor 280 of Figure 2) . Further, the transmission and reception of signals by the UE in process 400 may be enabled, for example, by one or more antennas (for example, antennas 252 of Figure 2) . In some aspects, the transmission and/or reception of signals by the UE may be implemented via a bus interface of one or more processors (for example, controller/processor 280) obtaining and/or outputting signals.
  • the process 400 may begin in block 405 with the UE transmitting, to a first base station via a first subscription associated with a first SIM of the UE, a first request for registration with a first RAT (for example, 5G) .
  • the UE may receive, from the first base station, a rejection of the first request via the first subscription of the UE, and in block 415, disable a SA mode of operation for a second subscription associated with a second SIM of the UE based on the rejection of the first request.
  • the first subscription and the second subscription are associated with the same operator. In other words, the UE may disable SA mode of operation for the second subscription of the UE in order to prevent failed registration attempts by the second subscription, increasing registration efficiency for the second subscription.
  • the first request may be transmitted while a PLMN is enabled for a cell of the first RAT.
  • disabling the SA mode of operation for the second subscription in block 415 may include adding an identifier of the PLMN to a first forbidden PLMN (FPLMN) list.
  • the first FPLMN list may indicate PLMNs to which the UE is to refrain from transmitting, via the second subscription, requests for registration while operating in the SA mode of operation.
  • FPLMN forbidden PLMN
  • the UE may add an identifier of the PLMN to a second FPLMN list based on the rejection of the first request, the second FPLMN list indicating PLMNs to which the first subscription of the UE is to refrain from transmitting, via the first subscription, requests for registration while operating in a SA mode of operation.
  • adding the identifier of the PLMN to the first FPLMN list may include synchronizing the first FPLMN list with the second FPLMN list.
  • FIG. 5 is a call flow diagram illustrating example process 500 for network registration that supports network registration for devices capable of multiple simultaneous subscriptions, in accordance with some aspects of the present disclosure.
  • the UE 120 may attempt to register with NR5G in a SA mode of operation via a first subscription (SUB1) of the UE.
  • the first subscription of the UE 120 may be managed by a first subscription component 550 (for example, BB1 of baseband processor 316) .
  • the UE may transmit, via the first subscription component 550, a request for registration 514 to a 5G cell 504 (for example, a base station for a 5G SA cell) , as illustrated.
  • the UE 120 may receive a register rejection 516 with cause indicating that 5GS service is not allowed.
  • the UE 120 may disable SA mode of operation for the first subscription, allowing the UE to register with LTE.
  • a public land mobile network PLMN
  • PLMN public land mobile network
  • the UE 120 may add an identifier of the PLMN of the 5G cell 504 to a forbidden PLMN (FPLMN) list for the first subscription, in block 560.
  • the UE may then, in block 518, disable SA mode of operation for the first subscription, as illustrated.
  • PLMN public land mobile network
  • FPLMN forbidden PLMN
  • the FPLMN list generally refers to a list of PLMNs with which the UE is to forgo registering during the SA mode of operation.
  • An FPLMN list may also be referred to as a forbidden SA list (forbidden_SA_list) .
  • the UE 120 may transmit a request for registration 520 to the LTE cell 506 (for example, a base station for LTE NSA anchor cell) for the first subscription, and may receive a register accept message 522, allowing the UE 112 to register with LTE for communication in block 524 while in an NSA mode of operation for the first subscription.
  • the LTE cell 506 for example, a base station for LTE NSA anchor cell
  • the UE 120 may take action to disable SA mode of operation for a second subscription (SUB2) of the UE 120.
  • the second subscription of the UE 120 may be managed by a second subscription component 552 (for example, BB2 of baseband processor 316) .
  • the first subscription and the second subscriptions of the UE may have the same operator. Therefore, if the UE 120 attempts to register with the 5G cell 504 for the second subscription, the UE 120 may receive another register rejection with cause indicating that 5GS service is not allowed. Therefore, in response to receiving the rejection 516 for the first subscription, the UE may disable SA for both the first subscription and the second subscription, given that the first and second subscriptions of the UE share the same operator.
  • the UE may have a first FPLMN list for first subscription and a second FPLMN list for the second subscription.
  • the UE may synchronize the second FPLMN list for the second subscription with the first FPLMN list for the first subscription.
  • the first subscription component 550 may send a FPLMN synchronization request (for example, forbidden_SA_list_sync_req) to the second subscription component 552.
  • the second subscription component 552 may update the FPLMN list for the second subscription, and in block 572, disable SA mode of operation for the second subscription.
  • the UE 120 may then transmit a request for registration 580 to the LTE cell 506 (for example, base station for LTE NSA anchor cell) and may receive a register accept message 582, allowing the UE 120 to register with LTE for communication in block 584 while in an NSA mode of operation for the second subscription.
  • LTE cell 506 for example, base station for LTE NSA anchor cell
  • FIG. 6 illustrates a communications device 600 that includes various components (for example, corresponding to means-plus-function components) configured to perform operations that support network registration for devices capable of multiple simultaneous subscriptions, in accordance with aspects of the present disclosure.
  • the communications device 600 includes a processing system 602 coupled to a transceiver 608 (for example, a transmitter and/or a receiver) .
  • the transceiver 608 is configured to transmit and receive signals for the communications device 600 via an antenna 610, such as the various signals as described herein.
  • the processing system 602 may be configured to perform processing functions for the communications device 600, including processing signals received and/or to be transmitted by the communications device 600.
  • the processing system 602 includes a processor 604 coupled to a computer-readable medium/memory 612 via a bus 606.
  • the computer-readable medium/memory 612 is configured to store instructions (for example, computer-executable code) that when executed by the processor 604, cause the processor 604 to perform the operations illustrated in Figure 4, or other operations for performing the various techniques discussed herein for network registration.
  • computer-readable medium/memory 612 stores code 614 for transmitting/receiving (for example, communicating) ; code 616 for disabling SA mode of operation; code 618 for adding an identifier of a PLMN to an FPLMN list; and code 620 for synchronization FPLMN lists.
  • the processor 604 has circuitry configured to implement the code stored in the computer-readable medium/memory 612.
  • the processor 604 includes circuitry 622 for transmitting/receiving (for example, communicating) ; circuitry 624 for disabling/enabling SA mode of operation; circuitry 626 for adding an identifier of a PLMN to an FPLMN list; and circuitry 628 for synchronization FPLMN lists.
  • NR for example, 5G NR
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single-carrier frequency division multiple access
  • TD-SCDMA time division synchronous code division multiple access
  • a CDMA network may implement a radio technology such as Universal Terrestrial Radio Access (UTRA) , cdma2000, etc.
  • UTRA Universal Terrestrial Radio Access
  • UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA.
  • cdma2000 covers IS-2000, IS-95 and IS-856 standards.
  • a TDMA network may implement a radio technology such as Global System for Mobile Communications (GSM) .
  • GSM Global System for Mobile Communications
  • An OFDMA network may implement a radio technology such as NR (for example 5G RA) , Evolved UTRA (E-UTRA) , Ultra Mobile Broadband (UMB) , IEEE 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Flash-OFDMA, etc.
  • NR for example 5G RA
  • E-UTRA Evolved UTRA
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wi-Fi
  • IEEE 802.16 WiMAX
  • IEEE 802.20 Flash-OFDMA
  • UTRA and E-UTRA are part of Universal Mobile Telecommunication System (UMTS) .
  • UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described in documents from an organization named “3rd Generation Partnership Project” (3GPP) .
  • cdma2000 and UMB are described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2) .
  • NR is an emerging wireless communications technology under development.
  • the term “cell” can refer to a coverage area of a Node B (NB) and/or a NB subsystem serving this coverage area, depending on the context in which the term is used.
  • NB Node B
  • BS next generation NodeB
  • AP access point
  • DU distributed unit
  • TRP transmission reception point
  • a BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or other types of cells.
  • a macro cell may cover a relatively large geographic area (for example, 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 (for example, a home) and may allow restricted access by UEs having an association with the femto cell (for example, UEs in a Closed Subscriber Group (CSG) , UEs for users in the home, etc. ) .
  • 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 UE may also be referred to as a mobile station, a terminal, an access terminal, a subscriber unit, a station, a Customer Premises Equipment (CPE) , a cellular phone, 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 computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, an appliance, a medical device or medical equipment, a biometric sensor/device, a wearable device such as a smart watch, smart clothing, smart glasses, a smart wrist band, smart jewelry (for example, a smart ring, a smart bracelet, etc.
  • CPE Customer Premises Equipment
  • PDA personal digital assistant
  • WLL wireless local loop
  • MTC machine-type communication
  • eMTC evolved MTC
  • MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., that may communicate with a BS, another device (for example, remote device) , or some other entity.
  • a wireless node may provide, for example, connectivity for or to a network (for example, a wide area network such as Internet or a cellular network) via a wired or wireless communication link.
  • a network for example, a wide area network such as Internet or a cellular network
  • Some UEs may be considered Internet-of-Things (IoT) devices, which may be narrowband IoT (NB-IoT) devices.
  • IoT Internet-of-Things
  • NB-IoT narrowband IoT
  • the methods disclosed herein include one or more steps or actions for achieving the methods.
  • the method steps and/or actions may be interchanged with one another without departing from the scope of the claims.
  • the order and/or use of specific steps and/or actions may be modified without departing from the scope of the claims.
  • determining encompasses a wide variety of actions. For example, “determining” may include calculating, computing, processing, deriving, investigating, looking up (for example, looking up in a table, a database or another data structure) , ascertaining and the like. Also, “determining” may include receiving (for example, receiving information) , accessing (for example, accessing data in a memory) and the like. Also, “determining” may include resolving, selecting, choosing, establishing and the like.
  • a or b may include a only, b only, or a combination of a and b.
  • a phrase referring to “at least one of” or “one or more of” a list of items refers to any combination of those items, including single members.
  • “at least one of: a, b, or c” is intended to cover the possibilities of: a only, b only, c only, a combination of a and b, a combination of a and c, a combination of b and c, and a combination of a and b and c.
  • a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members.
  • “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 (for example, 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 various operations of methods described above may be performed by any suitable means capable of performing the corresponding functions.
  • the means may include various hardware and/or software component (s) and/or module (s) , including, but not limited to a circuit, an application specific integrated circuit (ASIC) , or processor.
  • ASIC application specific integrated circuit

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

Abstract

Certains aspects de l'invention peuvent être mis en œuvre dans un procédé de communication sans fil par un équipement d'utilisateur (UE). Le procédé consiste généralement à : transmettre, à une première station de base au moyen d'un premier abonnement associé à un premier module d'identité d'abonné (SIM) de l'UE, une première demande d'enregistrement auprès d'une première technologie d'accès radio (RAT) ; recevoir, de la première station de base, un rejet de la première demande au moyen du premier abonnement de l'UE ; et désactiver un mode de fonctionnement autonome (SA) pour un second abonnement associé à un second SIM de l'UE d'après le rejet de la première demande.
PCT/CN2020/090713 2020-05-16 2020-05-16 Techniques d'enregistrement de réseau pour de multiples abonnements WO2021232174A1 (fr)

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