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WO2019109350A1 - Amélioration du taux de réussite de voix sur lte (volte) dans un dispositif à double sim, double veille (dsds) - Google Patents

Amélioration du taux de réussite de voix sur lte (volte) dans un dispositif à double sim, double veille (dsds) Download PDF

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Publication number
WO2019109350A1
WO2019109350A1 PCT/CN2017/115286 CN2017115286W WO2019109350A1 WO 2019109350 A1 WO2019109350 A1 WO 2019109350A1 CN 2017115286 W CN2017115286 W CN 2017115286W WO 2019109350 A1 WO2019109350 A1 WO 2019109350A1
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WO
WIPO (PCT)
Prior art keywords
subscription service
volte
dual
voice over
dsds
Prior art date
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Ceased
Application number
PCT/CN2017/115286
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English (en)
Inventor
Yongsheng Shi
Zhanyi Liu
Jiming Guo
Baojun LU
Uttam Pattanayak
Qingxin Chen
Ammar Kitabi
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Qualcomm Inc
Original Assignee
Qualcomm Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Priority to PCT/CN2017/115286 priority Critical patent/WO2019109350A1/fr
Publication of WO2019109350A1 publication Critical patent/WO2019109350A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • H04W36/00224—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]
    • H04W36/00226—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB] wherein the core network technologies comprise IP multimedia system [IMS], e.g. single radio voice call continuity [SRVCC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/06—De-registration or detaching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • 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

Definitions

  • the following relates generally to wireless communication, and more specifically to improve voice over LTE (VoLTE) success rate in a dual subscriber identify module (SIM) dual standby (DSDS) device.
  • VoIP voice over LTE
  • SIM subscriber identify module
  • DSDS dual standby
  • Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power) .
  • Examples of such multiple-access systems include fourth generation (4G) systems such as a Long Term Evolution (LTE) systems or LTE-Advanced (LTE-A) systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems.
  • 4G fourth generation
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • 5G New Radio
  • a wireless multiple-access communications system may include a number of base stations or network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE) .
  • UE user equipment
  • FIG. 1 illustrates an example of a system for wireless communication that supports improving voice over LTE (VoLTE) success rate in a dual subscriber identify module (SIM) dual standby (DSDS) device in accordance with aspects of the present disclosure.
  • VoIP voice over LTE
  • SIM subscriber identify module
  • DSDS dual standby
  • FIG. 2 illustrates a device that supports improving voice over LTE (VoLTE) success rate in a dual subscriber identify module (SIM) dual standby (DSDS) device in accordance with aspects of the present disclosure.
  • VoIP voice over LTE
  • SIM subscriber identify module
  • DSDS dual standby
  • a user equipment may support concurrent radio access technologies (RAT) , for example, GSM/UMTS and LTE, using one or more subscriber identity module (SIM) cards.
  • RAT radio access technologies
  • SIM subscriber identity module
  • a UE may support concurrent subscription services from different mobile network operators using one or more SIM cards.
  • aspects of the disclosure are initially described in the context of a wireless communications system. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to improving voice over LTE (VoLTE) success rate in a dual SIM dual standby (DSDS) device.
  • VoIP voice over LTE
  • DSDS dual SIM dual standby
  • FIG. 1 illustrates an example of a wireless communications system 100 that supports improving voice over LTE (VoLTE) success rate in a dual subscriber identify module (SIM) dual standby (DSDS) device in accordance with various aspects of the present disclosure.
  • the wireless communications system 100 includes base stations 105, UEs 115, and a core network 130.
  • the wireless communications system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, or a New Radio (NR) network.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • NR New Radio
  • wireless communications system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, or communications with low-cost and low-complexity devices.
  • ultra-reliable e.g., mission critical
  • Base stations 105 may wirelessly communicate with UEs 115 via one or more base station antennas.
  • Base stations 105 described herein may include or may be referred to by those skilled in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB) , a next-generation Node B or giga-nodeB (either of which may be referred to as a gNB) , a Home NodeB, a Home eNodeB, or some other suitable terminology.
  • Wireless communications system 100 may include base stations 105 of different types (e.g., macro or small cell base stations) .
  • the UEs 115 described herein may be able to communicate with various types of base stations 105 and network equipment including macro eNBs, small cell eNBs, gNBs, relay base stations, and the like.
  • Each base station 105 may be associated with a particular geographic coverage area 110 in which communications with various UEs 115 is supported. Each base station 105 may provide communication coverage for a respective geographic coverage area 110 via communication links 125, and communication links 125 between a base station 105 and a UE 115 may utilize one or more carriers. Communication links 125 shown in wireless communications system 100 may include uplink transmissions from a UE 115 to a base station 105, or downlink transmissions, from a base station 105 to a UE 115. Downlink transmissions may also be called forward link transmissions while uplink transmissions may also be called reverse link transmissions.
  • the geographic coverage area 110 for a base station 105 may be divided into sectors making up only a portion of the geographic coverage area 110, and each sector may be associated with a cell.
  • each base station 105 may provide communication coverage for a macro cell, a small cell, a hot spot, or other types of cells, or various combinations thereof.
  • a base station 105 may be movable and therefore provide communication coverage for a moving geographic coverage area 110.
  • different geographic coverage areas 110 associated with different technologies may overlap, and overlapping geographic coverage areas 110 associated with different technologies may be supported by the same base station 105 or by different base stations 105.
  • the wireless communications system 100 may include, for example, a heterogeneous LTE/LTE-A or NR network in which different types of base stations 105 provide coverage for various geographic coverage areas 110.
  • the term “cell” refers to a logical communication entity used for communication with a base station 105 (e.g., over a carrier) , and may be associated with an identifier for distinguishing neighboring cells (e.g., a physical cell identifier (PCID) , a virtual cell identifier (VCID) ) operating via the same or a different carrier.
  • a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., machine-type communication (MTC) , narrowband Internet-of-Things (NB-IoT) , enhanced mobile broadband (eMBB) , or others) that may provide access for different types of devices.
  • MTC machine-type communication
  • NB-IoT narrowband Internet-of-Things
  • eMBB enhanced mobile broadband
  • the term “cell” may refer to a portion of a geographic coverage area 110 (e.g., a sector) over which the logical entity operates.
  • UEs 115 may be dispersed throughout the wireless communications system 100, and each UE 115 may be stationary or mobile.
  • a UE 115 may also be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client.
  • a UE 115 may also be a personal electronic device such as a cellular phone, a personal digital assistant (PDA) , a tablet computer, a laptop computer, or a personal computer.
  • PDA personal digital assistant
  • a UE 115 may also refer to a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or an MTC device, or the like, which may be implemented in various articles such as appliances, vehicles, meters, or the like.
  • WLL wireless local loop
  • IoT Internet of Things
  • IoE Internet of Everything
  • MTC massive machine type communications
  • Base stations 105 may communicate with the core network 130 and with one another. For example, base stations 105 may interface with the core network 130 through backhaul links 132 (e.g., via an S1 or other interface) . Base stations 105 may communicate with one another over backhaul links 134 (e.g., via an X2 or other interface) either directly (e.g., directly between base stations 105) or indirectly (e.g., via core network 130) .
  • backhaul links 132 e.g., via an S1 or other interface
  • backhaul links 134 e.g., via an X2 or other interface
  • the core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions.
  • the core network 130 may be an evolved packet core (EPC) , which may include at least one mobility management entity (MME) , at least one serving gateway (S-GW) , and at least one Packet Data Network (PDN) gateway (P-GW) .
  • the MME may manage non-access stratum (e.g., control plane) functions such as mobility, authentication, and bearer management for UEs 115 served by base stations 105 associated with the EPC.
  • User IP packets may be transferred through the S-GW, which itself may be connected to the P-GW.
  • the P-GW may provide IP address allocation as well as other functions.
  • the P-GW may be connected to the network operators IP services.
  • the operators IP services may include access to the Internet, Intranet (s) , an IP Multimedia Subsystem (IMS) , or a Packet-Switched (PS) Stream
  • At least some of the network devices may include subcomponents such as an access network entity, which may be an example of an access node controller (ANC) .
  • Each access network entity may communicate with UEs 115 through a number of other access network transmission entities, which may be referred to as a radio head, a smart radio head, or a transmission/reception point (TRP) .
  • TRP transmission/reception point
  • various functions of each access network entity or base station 105 may be distributed across various network devices (e.g., radio heads and access network controllers) or consolidated into a single network device (e.g., a base station 105) .
  • wireless communications system 100 may be a packet-based network that operate according to a layered protocol stack.
  • PDCP Packet Data Convergence Protocol
  • a Radio Link Control (RLC) layer may in some cases perform packet segmentation and reassembly to communicate over logical channels.
  • RLC Radio Link Control
  • a Medium Access Control (MAC) layer may perform priority handling and multiplexing of logical channels into transport channels.
  • the MAC layer may also use hybrid automatic repeat request (HARQ) to provide retransmission at the MAC layer to improve link efficiency.
  • HARQ hybrid automatic repeat request
  • the Radio Resource Control (RRC) protocol layer may provide establishment, configuration, and maintenance of an RRC connection between a UE 115 and a base station 105 or core network 130 supporting radio bearers for user plane data.
  • RRC Radio Resource Control
  • PHY Physical
  • FIG. 2 shows a block diagram 200 of a wireless device 205 that supports improving voice over LTE (VoLTE) success rate in a dual subscriber identify module (SIM) dual standby (DSDS) device in accordance with aspects of the present disclosure.
  • Wireless device 205 may be an example of aspects of a UE 115 as described herein.
  • Wireless device 205 may include memory 210, processor 220, transceiver 225, antenna 230 and SIM 235, 237. Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses) .
  • the memory 210 may include random access memory (RAM) and/or read only memory (ROM) .
  • the memory 210 may store computer-readable, computer-executable software including instructions that, when executed, cause the processor to perform various functions described herein.
  • the software 215 may not be directly executable by the processor but may cause a computer (e.g., when compiled and executed) to perform functions described herein.
  • the transceiver 225 may communicate bi-directionally, via one or more antennas, wired, or wireless links, with one or more networks, as described above.
  • the transceiver 225 may communicate bi-directionally with a base station 105 or a UE 115.
  • the transceiver 225 may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas.
  • the processor 220 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a central processing unit (CPU) , a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) .
  • processor 220 may be configured to operate a memory 210 using a memory controller.
  • a memory controller may be integrated into processor 220.
  • Processor 220 may be configured to execute computer-readable instructions stored in a memory 210 to perform various functions.
  • the term processor is used herein in accordance with its meaning as structure.
  • the software 215 may include code configured to improve voice over LTE (VoLTE) success rate in a dual subscriber identify module (SIM) dual standby (DSDS) device in accordance with aspects of the present disclosure.
  • Software 215 may be stored in a non-transitory computer-readable medium such as system memory or other memory. In some cases, the software 215 may not be directly executable by the processor but may cause a computer (e.g., when compiled and executed) to perform functions described herein.
  • the wireless device may include a single antenna 230. However, in some cases the device may have more than one antenna 230, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.
  • the SIM 235 may be an integrated circuit (IC) that securely stores an international mobile subscriber identify (IMSI) and the related key used to identify and authenticate a wireless device 205.
  • SIM 235 may also contain a unique serial number, e.g., an integrated circuit card identification (ICCID) , security authentication and ciphering information, temporary information related to the local network, a list of the services, a personal identification number (PIN) , and a PIN unblocking key (PUK) for PIN unlocking.
  • ICCID integrated circuit card identification
  • PIN personal identification number
  • PIN PIN unblocking key
  • SIM 235 may be a circuit embedded in a removable card or directly embedded on the wireless device 205, or the UE 115.
  • SIM 235 may be also referred to as universal subscriber identity module (USIM) in LTE network.
  • USIM universal subscriber identity module
  • the UE 115 can have one or more SIMs.
  • the UE 115 may include two SIMs 235, 237 to support two different subscription services, which is referred to as dual SIM dual standby (DSDS) .
  • DSDS dual SIM dual standby
  • SSDS single SIM dual subscription
  • the UE 115 may operate two or more subscription services. For example, the UE 115 may operate two subscription services on LTE network.
  • MMS multimedia messaging service
  • PS packet-switched
  • the UE 115 performs IP Multimedia Subsystem (IMS) de-registration for a second subscription service to disable voice over LTE (VoLTE) support.
  • IMS IP Multimedia Subsystem
  • the UE 115 starts the MMS on the first subscription service.
  • the network may send circuit-switched (CS) page for a voice call to the UE 115.
  • CS circuit-switched
  • the UE 115 may receive the CS page through the second subscription service and respond to the CS page, which may include a CS page indication. If the UE 115 receives a PS page through the second subscription service, the UE 115 ignores the PS page. After the UE 115 completes MMS operation on the first subscription service, the UE 115 performs IMS registration for the first subscription service to enable VoLTE on the first subscription service.
  • 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
  • a CDMA system may implement a radio technology such as CDMA2000, Universal Terrestrial Radio Access (UTRA) , etc.
  • CDMA2000 covers IS-2000, IS-95, and IS-856 standards.
  • IS-2000 Releases may be commonly referred to as CDMA2000 1X, 1X, etc.
  • IS-856 TIA-856) is commonly referred to as CDMA2000 1xEV-DO, High Rate Packet Data (HRPD) , etc.
  • UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA.
  • a TDMA system may implement a radio technology such as Global System for Mobile Communications (GSM) .
  • GSM Global System for Mobile Communications
  • An OFDMA system may implement a radio technology such as Ultra Mobile Broadband (UMB) , Evolved UTRA (E-UTRA) , Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Flash-OFDM, etc.
  • UMB Ultra Mobile Broadband
  • E-UTRA Evolved UTRA
  • IEEE Institute of Electrical and Electronics Engineers
  • Wi-Fi Institute of Electrical and Electronics Engineers
  • WiMAX IEEE 802.16
  • IEEE 802.20 Flash-OFDM
  • UTRA and E-UTRA are part of Universal Mobile Telecommunications System (UMTS) .
  • LTE and LTE-A are releases of UMTS that use E-UTRA.
  • UTRA, E-UTRA, UMTS, LTE, LTE-A, NR, and GSM are described in documents from the organization named “3rd Generation Partnership Project” (3GPP) .
  • 3GPP 3rd Generation
  • CDMA2000 and UMB are described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2) .
  • 3GPP2 3rd Generation Partnership Project 2
  • the techniques described herein may be used for the systems and radio technologies mentioned above as well as other systems and radio technologies. While aspects of an LTE or an NR system may be described for purposes of example, and LTE or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE or NR applications.
  • a macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs 115 with service subscriptions with the network provider.
  • a small cell may be associated with a lower-powered base station 105, as compared with a macro cell, and a small cell may operate in the same or different (e.g., licensed, unlicensed, etc. ) frequency bands as macro cells.
  • Small cells may include pico cells, femto cells, and micro cells according to various examples.
  • a pico cell for example, may cover a small geographic area and may allow unrestricted access by UEs 115 with service subscriptions with the network provider.
  • a femto cell may also cover a small geographic area (e.g., a home) and may provide restricted access by UEs 115 having an association with the femto cell (e.g., UEs 115 in a closed subscriber group (CSG) , UEs 115 for users in the home, and the like) .
  • An eNB for a macro cell may be referred to as a macro eNB.
  • An eNB for a small cell may be referred to as a small cell eNB, a pico eNB, a femto eNB, or a home eNB.
  • An eNB may support one or multiple (e.g., two, three, four, and the like) cells, and may also support communications using one or multiple component carriers.
  • the wireless communications system 100 or systems described herein may support synchronous or asynchronous operation.
  • the base stations 105 may have similar frame timing, and transmissions from different base stations 105 may be approximately aligned in time.
  • the base stations 105 may have different frame timing, and transmissions from different base stations 105 may not be aligned in time.
  • the techniques described herein may be used for either synchronous or asynchronous operations.
  • Information and signals described herein may be represented using any of a variety of different technologies and techniques.
  • data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • FPGA field-programmable gate array
  • PLD programmable logic device
  • 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, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration) .
  • the functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described above can be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
  • Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a non-transitory storage medium may be any available medium that can be accessed by a general purpose or special purpose computer.
  • non-transitory computer-readable media may comprise random-access memory (RAM) , read-only memory (ROM) , electrically erasable programmable read only memory (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory 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.
  • RAM random-access memory
  • ROM read-only memory
  • EEPROM electrically erasable programmable read only memory
  • CD compact disk
  • magnetic disk storage or other magnetic storage devices or any other non-transitory medium
  • any connection is 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, digital subscriber line (DSL) , or wireless technologies such as infrared, radio, and microwave
  • the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium.
  • Disk and disc include CD, laser disc, optical disc, digital versatile disc (DVD) , floppy disk and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

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

Abstract

La présente invention concerne des procédés, des systèmes et des dispositifs de communication sans fil. Selon l'invention, un équipement utilisateur (UE) peut être configuré pour prendre en charge des procédures permettant d'améliorer le taux de réussite de voix sur LTE (VoLTE) dans un dispositif à double module d'identité d'abonné (SIM), double veille (DSDS). Par exemple, lorsque l'UE détermine qu'un premier service d'abonnement est sur le point de lancer un service de messagerie multimédia (MMS) ou d'amorcer une autre communication de données à commutation de paquets (PS), l'UE dés-enregistre le sous-système multimédia IP (IMS) d'un second service d'abonnement afin de désactiver la prise en charge de voix sur LTE (VoLTE). Après que l'UE achève le dés-enregistrement de l'IMS du second service d'abonnement, l'UE démarre le MMS sur le premier service d'abonnement. Après que l'UE achève l'opération MMS sur le premier service d'abonnement, l'UE effectue un enregistrement de l'IMS auprès du premier service d'abonnement afin de permettre une VoLTE sur le premier service d'abonnement.
PCT/CN2017/115286 2017-12-08 2017-12-08 Amélioration du taux de réussite de voix sur lte (volte) dans un dispositif à double sim, double veille (dsds) Ceased WO2019109350A1 (fr)

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PCT/CN2017/115286 WO2019109350A1 (fr) 2017-12-08 2017-12-08 Amélioration du taux de réussite de voix sur lte (volte) dans un dispositif à double sim, double veille (dsds)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120021715A1 (en) * 2010-07-26 2012-01-26 Kundan Tiwari Method of Handling Emergency Session And Related Communication Device
US20150281929A1 (en) * 2014-04-01 2015-10-01 Mediatek Inc. Method of selecting an active sim for an emergency service and multi-sim device utilizing the same
US20160330655A1 (en) * 2015-05-04 2016-11-10 Apple Inc. Enhanced Voice Roaming for UE Devices Associated with a Home Network without SRVCC
US20170230870A1 (en) * 2016-02-09 2017-08-10 Qualcomm Incorporated Apparatus and method of performing efficient data service switch between two subscriptions in dual sim dual standby devices
WO2017143609A1 (fr) * 2016-02-27 2017-08-31 Qualcomm Incorporated Dispositif de communication mobile double sim double veille permettant de libérer une connexion rrc sur un abonnement sur la base des activités sur un autre abonnement

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120021715A1 (en) * 2010-07-26 2012-01-26 Kundan Tiwari Method of Handling Emergency Session And Related Communication Device
US20150281929A1 (en) * 2014-04-01 2015-10-01 Mediatek Inc. Method of selecting an active sim for an emergency service and multi-sim device utilizing the same
US20160330655A1 (en) * 2015-05-04 2016-11-10 Apple Inc. Enhanced Voice Roaming for UE Devices Associated with a Home Network without SRVCC
US20170230870A1 (en) * 2016-02-09 2017-08-10 Qualcomm Incorporated Apparatus and method of performing efficient data service switch between two subscriptions in dual sim dual standby devices
WO2017143609A1 (fr) * 2016-02-27 2017-08-31 Qualcomm Incorporated Dispositif de communication mobile double sim double veille permettant de libérer une connexion rrc sur un abonnement sur la base des activités sur un autre abonnement

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