WO2021232395A1 - Récupération à partir d'une défaillance d'enregistrement de service de paquet voix - Google Patents

Récupération à partir d'une défaillance d'enregistrement de service de paquet voix Download PDF

Info

Publication number
WO2021232395A1
WO2021232395A1 PCT/CN2020/091721 CN2020091721W WO2021232395A1 WO 2021232395 A1 WO2021232395 A1 WO 2021232395A1 CN 2020091721 W CN2020091721 W CN 2020091721W WO 2021232395 A1 WO2021232395 A1 WO 2021232395A1
Authority
WO
WIPO (PCT)
Prior art keywords
network node
voice service
packet session
packet
cell reselection
Prior art date
Application number
PCT/CN2020/091721
Other languages
English (en)
Inventor
Hao Zhang
Fojian ZHANG
Chaofeng HUI
Jian Li
Shuhong Wang
Tianya LIN
Yi Liu
Yuankun ZHU
Original Assignee
Qualcomm Incorporated
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Priority to PCT/CN2020/091721 priority Critical patent/WO2021232395A1/fr
Publication of WO2021232395A1 publication Critical patent/WO2021232395A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • 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
    • H04W60/04—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
    • H04W48/02—Access restriction performed under specific conditions
    • 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
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Definitions

  • Various aspects described herein generally relate to wireless communication systems, and more particularly, to recovering from voice packet service registration failures, such as IP multimedia system (IMS) registration failures.
  • IMS IP multimedia system
  • Wireless communication systems have developed through various generations, including a first-generation analog wireless phone service (1G) , a second-generation (2G) digital wireless phone service (including interim 2.5G and 2.75G networks) , a third-generation (3G) high speed data, Internet-capable wireless service and a fourth-generation (4G) service (e.g., Long-Term Evolution (LTE) or WiMax) .
  • 1G first-generation analog wireless phone service
  • 2G second-generation
  • 3G third-generation
  • 4G fourth-generation
  • LTE Long-Term Evolution
  • WiMax Worldwide Interoperability for Mobile communications
  • PCS Personal Communications Service
  • Examples of known cellular systems include the cellular Analog Advanced Mobile Phone System (AMPS) , and digital cellular systems based on Code Division Multiple Access (CDMA) , Frequency Division Multiple Access (FDMA) , Time Division Multiple Access (TDMA) , the Global System for Mobile access (GSM) variation of TDMA, etc.
  • AMPS cellular Analog Advanced Mobile Phone System
  • CDMA Code Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • TDMA Time Division Multiple Access
  • GSM Global System for Mobile access
  • a fifth generation (5G) mobile standard calls for higher data transfer speeds, greater numbers of connections, and better coverage, among other improvements.
  • the 5G standard according to the Next Generation Mobile Networks Alliance, is designed to provide data rates of several tens of megabits per second to each of tens of thousands of users, with 1 gigabit per second to tens of workers on an office floor. Several hundreds of thousands of simultaneous connections should be supported in order to support large sensor deployments. Consequently, the spectral efficiency of 5G mobile communications should be significantly enhanced compared to the current 4G standard. Furthermore, signaling efficiencies should be enhanced and latency should be substantially reduced compared to current standards.
  • NR connectivity or simply NR connectivity, has gained significant commercial traction in recent time.
  • UI user interface
  • UE user equipment
  • the UE may comprise a processor, a memory, and a transceiver.
  • the processor, the memory, and/or the transceiver may be configured to establish a first packet session with a first network node of a radio access technology (RAT) .
  • the processor, the memory, and/or the transceiver may also be configured to determine, subsequent to establishing the first packet session, whether a first voice service can be provided.
  • the first voice service may be a voice service provided using the first packet session.
  • the processor, the memory, and/or the transceiver may further be configured to trigger, when it is determined that the first voice service cannot be provided, a cell reselection to a second network node.
  • the second network node may be of a same RAT as the first network node, and the first and second network node may be members of different tracking areas.
  • the processor, the memory, and/or the transceiver may yet be configured to establish, subsequent to triggering the cell reselection to the second network node, a second packet session with the second network node.
  • the processor, the memory, and/or the transceiver may yet further be configured to provide a second voice service.
  • the second voice service may be a voice service provided using the second packet session.
  • the method may comprise establishing a first packet session with a first network node of a radio access technology (RAT) .
  • the method may also comprise determining, subsequent to establishing the first packet session, whether a first voice service can be provided.
  • the first voice service may be a voice service provided using the first packet session.
  • the method may further comprise triggering, when it is determined that the first voice service cannot be provided, a cell reselection to a second network node.
  • the second network node may be of a same RAT as the first network node, and the first and second network node may be members of different tracking areas.
  • the method may yet comprise establishing, subsequent to triggering the cell reselection to the second network node, a second packet session with the second network node.
  • the method may yet further comprise providing a second voice service.
  • the second voice service may be a voice service provided using the second packet session.
  • the UE may comprise means for establishing a first packet session with a first network node of a radio access technology (RAT) .
  • the UE may also comprise means for determining, subsequent to establishing the first packet session, whether a first voice service can be provided.
  • the first voice service may be a voice service provided using the first packet session.
  • the UE may further comprise means for triggering, when it is determined that the first voice service cannot be provided, a cell reselection to a second network node.
  • the second network node may be of a same RAT as the first network node, and the first and second network node may be members of different tracking areas.
  • the UE may yet comprise means for establishing, subsequent to triggering the cell reselection to the second network node, a second packet session with the second network node.
  • the UE may yet further comprise means for providing a second voice service.
  • the second voice service may be a voice service provided using the second packet session.
  • a non-transitory computer-readable medium storing computer-executable instructions for a user equipment is disclosed.
  • the executable instructions may comprise one or more instructions instructing the UE to establish a first packet session with a first network node of a radio access technology (RAT) .
  • the executable instructions may also comprise one or more instructions instructing the UE to determine, subsequent to establishing the first packet session, whether a first voice service can be provided.
  • the first voice service may be a voice service provided using the first packet session.
  • the executable instructions may further comprise one or more instructions instructing the UE to trigger, when it is determined that the first voice service cannot be provided, a cell reselection to a second network node.
  • the second network node may be of a same RAT as the first network node, and the first and second network node may be members of different tracking areas.
  • the executable instructions may yet comprise one or more instructions instructing the UE to establish, subsequent to triggering the cell reselection to the second network node, a second packet session with the second network node.
  • the executable instructions may yet further comprise one or more instructions instructing the UE to provide a second voice service.
  • the second voice service may be a voice service provided using the second packet session.
  • FIG. 1 illustrates an exemplary wireless communications system in accordance with one or more aspects of the disclosure
  • FIG. 2 illustrates a simplified block diagram of several sample aspects of components that may be employed in wireless communication nodes and configured to support communication in accordance with one or more aspects of the disclosure
  • FIG. 3 illustrates a flow of an example scenario that shows a conventional technique implemented by a user equipment to recover from an IMS registration failure
  • FIG. 4 illustrates a flow of an example scenario that shows a technique to implemented by a user equipment to recover from an IMS registration failure in accordance with one or more aspects of the disclosure
  • FIGs. 5-8 illustrate flow charts of an exemplary method performed by a user equipment to recover from voice packet service registration failure in accordance with one or more aspects of the disclosure
  • FIG. 9 illustrates a simplified block diagram of several sample aspects of a user equipment apparatus configured for recovery from voice packet service registration failure in accordance with one or more aspects of the disclosure.
  • various aspects may be described in terms of sequences of actions to be performed by, for example, elements of a computing device.
  • Those skilled in the art will recognize that various actions described herein can be performed by specific circuits (e.g., an application specific integrated circuit (ASIC) ) , by program instructions being executed by one or more processors, or by a combination of both.
  • these sequences of actions described herein can be considered to be embodied entirely within any form of non-transitory computer-readable medium having stored thereon a corresponding set of computer instructions that upon execution would cause an associated processor to perform the functionality described herein.
  • the various aspects described herein may be embodied in a number of different forms, all of which have been contemplated to be within the scope of the claimed subject matter.
  • the corresponding form of any such aspects may be described herein as, for example, “logic configured to” and/or other structural components configured to perform the described action.
  • UE user equipment
  • base station base station
  • RAT Radio Access Technology
  • UEs may be any wireless communication device (e.g., a mobile phone, router, tablet computer, laptop computer, tracking device, Internet of Things (IoT) device, etc. ) used by a user to communicate over a wireless communications network.
  • a UE may be mobile or may (e.g., at certain times) be stationary, and may communicate with a Radio Access Network (RAN) .
  • RAN Radio Access Network
  • UE may be referred to interchangeably as an “access terminal” or “AT, ” a “client device, ” a “wireless device, ” a “subscriber device, ” a “subscriber terminal, ” a “subscriber station, ” a “user terminal” or UT, a “mobile terminal, ” a “mobile station, ” or variations thereof.
  • AT access terminal
  • client device a “client device
  • wireless device a “subscriber device, ” a “subscriber terminal, ” a “subscriber station, ” a “user terminal” or UT
  • UEs can communicate with a core network via a RAN, and through the core network the UEs can be connected with external networks such as the Internet and with other UEs.
  • WiFi networks e.g., based on Institute of Electrical and Electronics Engineers (IEEE) 802.11, etc.
  • IEEE Institute of Electrical and Electronics Engineers
  • a base station may operate according to one of several RATs in communication with UEs depending on the network in which it is deployed, and may be alternatively referred to as an Access Point (AP) , a Network Node, a NodeB, an evolved NodeB (eNB) , a general Node B (gNodeB, gNB) , etc.
  • AP Access Point
  • eNB evolved NodeB
  • gNodeB gNodeB, gNB
  • a base station may provide edge node signaling functions while in other systems it may provide additional control and/or network management functions.
  • UEs can be embodied by any of a number of types of devices including but not limited to printed circuit (PC) cards, compact flash devices, external or internal modems, wireless or wireline phones, smartphones, tablets, tracking devices, asset tags, and so on.
  • a communication link through which UEs can send signals to a RAN is called an uplink channel (e.g., a reverse traffic channel, a reverse control channel, an access channel, etc. ) .
  • a communication link through which the RAN can send signals to UEs is called a downlink or forward link channel (e.g., a paging channel, a control channel, a broadcast channel, a forward traffic channel, etc. ) .
  • traffic channel can refer to either an uplink /reverse or downlink /forward traffic channel.
  • FIG. 1 illustrates an exemplary wireless communications system 100 according to one or more aspects.
  • the wireless communications system 100 which may also be referred to as a wireless wide area network (WWAN) , may include various base stations 102 and various UEs 104.
  • the base stations 102 may include macro cells (high power cellular base stations) and/or small cells (low power cellular base stations) .
  • the macro cells may include Evolved NodeBs (eNBs) where the wireless communications system 100 corresponds to an Long-Term Evolution (LTE) network, gNodeBs (gNBs) where the wireless communications system 100 corresponds to a 5G network, and/or a combination thereof, and the small cells may include femtocells, picocells, microcells, etc.
  • LTE Long-Term Evolution
  • gNodeBs gNodeBs
  • the base stations 102 may collectively form a Radio Access Network (RAN) and interface with an Evolved Packet Core (EPC) or Next Generation Core (NGC) through backhaul links.
  • EPC Evolved Packet Core
  • NRC Next Generation Core
  • the base stations 102 may perform functions that relate to one or more of transferring user data, radio channel ciphering and deciphering, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity) , inter-cell interference coordination, connection setup and release, load balancing, distribution for non-access stratum (NAS) messages, NAS node selection, synchronization, RAN sharing, multimedia broadcast multicast service (MBMS) , subscriber and equipment trace, RAN information management (RIM) , paging, positioning, and delivery of warning messages.
  • the base stations 102 may communicate with each other directly or indirectly (e.g., through the EPC /NGC) over backhaul links 134, which may be wired or wireless.
  • the base stations 102 may wirelessly communicate with the UEs 104. Each of the base stations 102 may provide communication coverage for a respective geographic coverage area 110. In an aspect, although not shown in FIG. 1, coverage areas 110 may be subdivided into a plurality of cells (e.g., three) , or sectors, each cell corresponding to a single antenna or array of antennas of a base station 102. As used herein, the term “cell” or “sector” may correspond to one of a plurality of cells of a base station 102, or to the base station 102 itself, depending on the context.
  • While neighbor macro cell geographic coverage areas 110 may partially overlap (e.g., in a handover region) , some of the geographic coverage areas 110 may be substantially overlapped by a larger geographic coverage area 110.
  • a small cell base station 102' may have a coverage area 110' that substantially overlaps with the coverage area 110 of one or more macro cell base stations 102.
  • a network that includes both small cell and macro cells may be known as a heterogeneous network.
  • a heterogeneous network may also include Home eNBs (HeNBs) and/or Home gNodeBs, which may provide service to a restricted group known as a closed subscriber group (CSG) .
  • HeNBs Home eNBs
  • CSG closed subscriber group
  • the communication links 120 between the base stations 102 and the UEs 104 may include uplink (UL) (also referred to as reverse link) transmissions from a UE 104 to a base station 102 and/or downlink (DL) (also referred to as forward link) transmissions from a base station 102 to a UE 104.
  • the communication links 120 may use multiple input multiple output (MIMO) antenna technology, including spatial multiplexing, beamforming, and/or transmit diversity.
  • MIMO multiple input multiple output
  • the communication links may be through one or more carriers. Allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or less carriers may be allocated for DL than for UL) .
  • the wireless communications system 100 may further include a wireless local area network (WLAN) access point (AP) 150 in communication with WLAN stations (STAs) 152 via communication links 154 in an unlicensed frequency spectrum (e.g., 5 GHz) .
  • WLAN wireless local area network
  • AP access point
  • the WLAN STAs 152 and/or the WLAN AP 150 may perform a clear channel assessment (CCA) prior to communicating in order to determine whether the channel is available.
  • CCA clear channel assessment
  • the small cell base station 102' may operate in a licensed and/or an unlicensed frequency spectrum. When operating in an unlicensed frequency spectrum, the small cell base station 102' may employ LTE or 5G technology and use the same 5 GHz unlicensed frequency spectrum as used by the WLAN AP 150. The small cell base station 102', employing LTE/5G in an unlicensed frequency spectrum, may boost coverage to and/or increase capacity of the access network.
  • LTE in an unlicensed spectrum may be referred to as LTE-unlicensed (LTE-U) , licensed assisted access (LAA) , or MulteFire.
  • the wireless communications system 100 may further include a mmW base station 180 that may operate in mmW frequencies and/or near mmW frequencies in communication with a UE 182.
  • Extremely high frequency (EHF) is part of the radio frequency (RF) range in the electromagnetic spectrum. EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 millimeter and 10 millimeters. Radio waves in this band may be referred to as a millimeter wave.
  • Near mmW may extend down to a frequency of 3 GHz with a wavelength of 100 millimeters.
  • the super high frequency (SHF) band extends between 3 GHz and 30 GHz, also referred to as centimeter wave.
  • the mmW base station 180 may utilize beamforming 184 with the UE 182 to compensate for the extremely high path loss and short range. Further, it will be appreciated that in alternative configurations, one or more base stations 102 may also transmit using mmW or near mmW and beamforming. Accordingly, it will be appreciated that the foregoing illustrations are merely examples and should not be construed to limit the various aspects disclosed herein.
  • the wireless communications system 100 may further include one or more UEs, such as UE 190, that connects indirectly to one or more communication networks via one or more device-to-device (D2D) peer-to-peer (P2P) links.
  • D2D device-to-device
  • P2P peer-to-peer
  • UE 190 has a D2D P2P link 192 with one of the UEs 104 connected to one of the base stations 102 (e.g., through which UE 190 may indirectly obtain cellular connectivity) and a D2D P2P link 194 with WLAN STA 152 connected to the WLAN AP 150 (through which UE 190 may indirectly obtain WLAN-based Internet connectivity) .
  • the D2D P2P links 192-194 may be supported with any well-known D2D radio access technology (RAT) , such as LTE Direct (LTE-D) , WiFi Direct (WiFi-D) , Bluetooth, and so on.
  • RAT D2D radio access technology
  • Any of the base stations 102, 102’, 180 may send measurement requests (e.g., measurement control order (MCO) ) to the UEs 104, 182, 190, and the UE’s 104, 182, 190 may respond with measurement reports accordingly.
  • MCO measurement control order
  • FIG. 2 illustrates several sample components (represented by corresponding blocks) that may be incorporated into an apparatus 202 and an apparatus 204 (corresponding to, for example, a UE and a base station (e.g., eNB, gNB) , respectively, to support the operations as disclosed herein.
  • the apparatus 202 may correspond to a UE
  • the apparatus 204 may correspond to a network node such as a gNB and/or an eNB.
  • the components may be implemented in different types of apparatuses in different implementations (e.g., in an ASIC, in a System-on-Chip (SoC) , etc. ) .
  • the illustrated components may also be incorporated into other apparatuses in a communication system.
  • apparatuses in a system may include components similar to those described to provide similar functionality.
  • a given apparatus may contain one or more of the components.
  • an apparatus may include multiple transceiver components that enable the apparatus to operate on multiple carriers and/or communicate via different technologies.
  • the apparatus 202 and the apparatus 204 each may include at least one wireless communication device (represented by the communication devices 208 and 214) for communicating with other nodes via at least one designated RAT (e.g., LTE, New Radio (NR) ) .
  • Each communication device 208 may include at least one transmitter (represented by the transmitter 210) for transmitting and encoding signals (e.g., messages, indications, information, and so on) and at least one receiver (represented by the receiver 212) for receiving and decoding signals (e.g., messages, indications, information, pilots, and so on) .
  • Each communication device 214 may include at least one transmitter (represented by the transmitter 216) for transmitting signals (e.g., messages, indications, information, pilots, and so on) and at least one receiver (represented by the receiver 218) for receiving signals (e.g., messages, indications, information, and so on) .
  • signals e.g., messages, indications, information, pilots, and so on
  • receiver 2148 for receiving signals (e.g., messages, indications, information, and so on) .
  • a transmitter and a receiver may comprise an integrated device (e.g., embodied as a transmitter circuit and a receiver circuit of a single communication device) in some implementations, may comprise a separate transmitter device and a separate receiver device in some implementations, or may be embodied in other ways in other implementations.
  • a transmitter may include a plurality of antennas, such as an antenna array, that permits the respective apparatus to perform transmit “beamforming, ” as described further herein.
  • a receiver may include a plurality of antennas, such as an antenna array, that permits the respective apparatus to perform receive beamforming, as described further herein.
  • the transmitter and receiver may share the same plurality of antennas, such that the respective apparatus can only receive or transmit at a given time, not both at the same time.
  • a wireless communication device (e.g., one of multiple wireless communication devices) of the apparatus 204 may also comprise a Network Listen Module (NLM) or the like for performing various measurements.
  • NLM Network Listen Module
  • the apparatus 204 may include at least one communication device (represented by the communication device 220) for communicating with other nodes.
  • the communication device 220 may comprise a network interface (e.g., one or more network access ports) configured to communicate with one or more network entities via a wire-based or wireless backhaul connection.
  • the communication device 220 may be implemented as a transceiver configured to support wire-based or wireless signal communication. This communication may involve, for example, sending and receiving messages, parameters, or other types of information.
  • the communication device 220 is shown as comprising a transmitter 222 and a receiver 224 (e.g., network access ports for transmitting and receiving) .
  • the apparatuses 202 and 204 may also include other components used in conjunction with the operations as disclosed herein.
  • the apparatus 202 may include a processing system 232 for providing functionality relating to, for example, communication with the network.
  • the apparatus 204 may include a processing system 234 for providing functionality relating to, for example, communication with the UEs.
  • the processing systems 232 and 234 may include, for example, one or more general purpose processors, multi-core processors, ASICs, digital signal processors (DSPs) , field programmable gate arrays (FPGA) , or other programmable logic devices or processing circuitry.
  • the apparatuses 202 and 204 may include measurement components 252 and 254 that may be used to obtain channel related measurements.
  • the measurement component 252 may measure one or more downlink (DL) signals such as channel state information reference signal (CSI-RS) , phase tracking reference signal (PTRS) , primary synchronization signal (PSS) , secondary synchronization signal (SSS) , demodulation reference signal (DMRS) , etc.
  • the measurement component 254 may measure one or more uplink (UL) signals such as DMRS, sounding reference signal (SRS) , etc.
  • DL downlink
  • PTRS phase tracking reference signal
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • DMRS demodulation reference signal
  • UL uplink
  • the apparatuses 202 and 204 may include memory components 238 and 240 (e.g., each including a memory device) , respectively, for maintaining information (e.g., information indicative of reserved resources, thresholds, parameters, and so on) .
  • memory 238 can comprise a computer-readable medium storing one or more computer-executable instructions for a user equipment (UE) where the one or more instructions instruct apparatus 202 (e.g., processing system 232 in combination with communications device 208 and/or other aspects of apparatus 202) to perform any of the functions of FIGs. 3, 4, and 5.
  • UE user equipment
  • the apparatuses 202 and 204 may include user interface devices 244 and 246, respectively, for providing indications (e.g., audible and/or visual indications) to a user and/or for receiving user input (e.g., upon user actuation of a sensing device such a keypad, a touch screen, a microphone, and so on) .
  • indications e.g., audible and/or visual indications
  • user input e.g., upon user actuation of a sensing device such a keypad, a touch screen, a microphone, and so on.
  • the apparatus 202 may include a timer 256 and a counter 258.
  • the timer 256 may be configured to measure or otherwise determine one or more time durations.
  • the counter 258 may be configured to count or otherwise determine occurrences of one or more events.
  • the apparatuses 202 and 204 are shown in FIG. 2 as including various components that may be configured according to the various examples described herein. It will be appreciated, however, that the illustrated blocks may have different functionality in different designs.
  • the components of FIG. 2 may be implemented in various ways.
  • the components of FIG. 2 may be implemented in one or more circuits such as, for example, one or more processors and/or one or more ASICs (which may include one or more processors) .
  • each circuit may use and/or incorporate at least one memory component for storing information or executable code used by the circuit to provide this functionality.
  • some or all of the functionality represented by blocks 208, 232, 238, and 244 may be implemented by processor and memory component (s) of the apparatus 202 (e.g., by execution of appropriate code and/or by appropriate configuration of processor components) .
  • some or all of the functionality represented by blocks 214, 220, 234, 240, and 246 may be implemented by processor and memory component (s) of the apparatus 204 (e.g., by execution of appropriate code and/or by appropriate configuration of processor components) .
  • the apparatus 204 may correspond to a “small cell” or a Home gNodeB.
  • the apparatus 202 may transmit and receive messages via a wireless link 260 with the apparatus 204, the messages including information related to various types of communication (e.g., voice, data, multimedia services, associated control signaling, etc. ) .
  • the wireless link 260 may operate over a communication medium of interest, shown by way of example in FIG. 2 as the medium 262, which may be shared with other communications as well as other RATs.
  • a medium of this type may be composed of one or more frequency, time, and/or space communication resources (e.g., encompassing one or more channels across one or more carriers) associated with communication between one or more transmitter /receiver pairs, such as the apparatus 204 and the apparatus 202 for the medium 262.
  • space communication resources e.g., encompassing one or more channels across one or more carriers
  • the apparatus 202 and the apparatus 204 may operate via the wireless link 260 according to one or more radio access types, such as LTE, LTE-U, or NR, depending on the network in which they are deployed.
  • These networks may include, for example, different variants of CDMA networks (e.g., LTE networks, NR networks, etc. ) , TDMA networks, FDMA networks, Orthogonal FDMA (OFDMA) networks, Single-Carrier FDMA (SC-FDMA) networks, and so on.
  • a UE may be capable of operating in multiple radio access technologies (RATs) .
  • RATs radio access technologies
  • a UE may be capable of operating in a first RAT (e.g., NR) and in a second RAT (e.g., LTE) .
  • first and second RATs may be any of the RATs currently known (e.g., WiMax, CDMA, WCDMA, UTRA, Evolved Universal Terrestrial Radio Access (E-UTRA) , GSM, FDMA, GSM, TDMA, etc. ) .
  • a UE may be may be capable of operating in multiple RATs at the same time.
  • a UE that can operate in both LTE and NR simultaneously is an E-UTRA-NR Dual Connectivity (ENDC) capable UE.
  • ENDC is an example of Multi-RAT DC (MRDC) capability.
  • MRDC Multi-RAT DC
  • eNB base station
  • gNB base station
  • NR second RAT
  • the UE When the UE operates in the first RAT, it may communicate with a network node (e.g., base station, gNB, etc. ) of the first RAT. Similarly, when the UE operates in the second RAT, it may communicate with a network node (e.g., base station, eNB, etc. ) of the second RAT.
  • a network node e.g., base station, gNB, etc.
  • the UE may be capable of operating in a standalone (SA) or in a non-standalone (NSA) mode within a given RAT.
  • SA standalone
  • NSA non-standalone
  • the UE When operating in the SA mode, the UE is able to exchange both control and data plane (also referred to as user plane) information with the network node and/or the core network of the given RAT (e.g., NR) .
  • control and data plane also referred to as user plane
  • the UE is communicating with network nodes of the first and second RATs.
  • the UE can exchange data plane information with the network nodes of both the first RAT (e.g., NR) and the second RAT (e.g., LTE) .
  • the control plane information is exchanged only with the network node of the second RAT (e.g., LTE) .
  • a voice centric UE after a successful standalone (SA) attachment to a 5G NR node, e.g., after successful SA attachment to a gNB, can start IP multimedia subsystem (IMS) registration through a session initiation protocol (SIP) message in an attempt to provide voice over packet services.
  • IMS IP multimedia subsystem
  • SIP session initiation protocol
  • the IMS registration can fail due to network reasons, and the network can respond with a SIP 403 response indicating that the service is forbidden.
  • FIG. 3 an example flow of a scenario 300 that can conventionally occur when a UE attempts to IMS register to provide a voice over packet service.
  • the sequence in scenario 300 is as follows:
  • ⁇ UE sends a registration request to NR node
  • PDU packet data unit
  • ⁇ UE sends PDU session establishment request to NR node
  • ⁇ NR node accepts PDU session establishment request
  • ⁇ UE sends IMS registration request –send a SIP message
  • ⁇ NR node responds with SIP 403 message to indicate that service is forbidden
  • ⁇ UE disables N1 mode
  • ⁇ UE sends tracking area update (TAU) /attach request to LTE node;
  • TAU tracking area update
  • ⁇ LTE node accepts TAU/attach request.
  • the UE will be able to provide voice services with a packet session established with the LTE node.
  • the IMS failure can be permanent.
  • the voice service is likely to be less performing since LTE node is likely to be less performing than an NR node.
  • FIG. 4 illustrates an example of a scenario 400 in which the proposed automatic recovery mechanism is incorporated into a UE.
  • the sequence in scenario 400 may be as follows:
  • ⁇ UE sends a registration request to first NR node
  • ⁇ UE sends PDU session establishment request to first NR node:
  • ⁇ UE sends first IMS registration request –send a SIP message
  • First NR node responds with SIP 403 message to indicate that service is forbidden
  • ⁇ UE adds first tracking area code (TAC) to FTAC_list_IMS;
  • ⁇ UE trigger cell reselection to second NR node
  • ⁇ UE sends a registration request to second NR node
  • Second NR node accepts the registration request
  • ⁇ UE sends PDU session establishment request to second NR node
  • Second NR node accepts PDU session establishment request
  • ⁇ UE sends first IMS registration request –send a SIP message
  • Second NR node accepts of IMS registration request.
  • the UE will be able to provide voice services with the second packet session established with the second NR node. As a result, IMS failure is not permanent. Also, performance of the voice service provided through the second NR node should be greater than performance of the voice service provided through the LTE node.
  • FIG. 5 illustrates a flow chart of an exemplary recovery method performed by a UE, e.g., to recover from voice service registration failure in accordance with one or more aspects of the disclosure.
  • FIG. 5 may be viewed as a generalization of the flow of FIG. 4.
  • the UE such as the UE 202
  • the UE may also be capable of operating in another RAT such as LTE.
  • the UE may provide voice services in packet session with a network node of a higher performing RAT.
  • RAT radio access technology
  • the memory component 238 may be viewed as an example of a non-transitory computer-readable medium that stores computer-executable instructions to operate components of the UE 202 such as the transceiver 208 (including transmitter 210 and receiver 212) , the processing system 232 (including one or more processors) , memory component 238, etc.
  • the UE may attach to a first network node of a radio access technology (RAT) in a standalone mode.
  • Means for performing block 510 may include the processing system 232, the memory component 238 and/or the transceiver 208 of the UE 202.
  • the UE may send a registration request to the first network node, and may receive a corresponding registration acceptance from the first network node.
  • the first network node may be a 5G NR node, i.e., a gNB.
  • the UE may establish a first packet session with the first network node.
  • Means for performing block 520 may include the processing system 232, the memory component 238 and/or the transceiver 208 of the UE 202.
  • Block 520 may be performed subsequent to performing block 510.
  • the first packet session may be a packet data unit (PDU) session between the UE and the first network node.
  • PDU packet data unit
  • the UE may send a PDU session establishment request to the first network node, and may receive a corresponding PDU session establishment acceptance from the first network node.
  • the UE may establish the PDU session for voice over packet service, e.g., by setting a domain network name (DNN) to IMS in the PDU session establishment request.
  • DNN domain network name
  • the UE may determine whether or not a voice service can be provided using the first packet session.
  • first voice service will be used to refer to the voice service provided using the first packet session.
  • the UE may determine whether or not the first service can be provided.
  • Means for performing block 530 may include the processing system 232, the memory component 238 and/or the transceiver 208 of the UE 202.
  • FIG. 6 illustrates a flow chart of an example process that may be performed by the UE to implement block 530.
  • the UE may send a voice service registration request to the first network node.
  • the voice service registration request may be session initiation protocol (SIP) request to register for IMS.
  • Means for performing block 610 may include the processing system 232, the memory component 238 and/or the transceiver 208 of the UE 202.
  • the UE may receive a corresponding a voice service registration response from the first network node.
  • the voice service registration response may be SIP response.
  • Means for performing block 620 may include the processing system 232, the memory component 238 and/or the transceiver 208 of the UE 202.
  • the UE may determine whether forbidden is indicated in the voice service registration response. For example, the UE may determine whether SIP response 403 is received. Means for performing block 630 may include the processing system 232 and/or the memory component 238 of the UE 202.
  • the UE may determine that the first voice service cannot be provided.
  • Means for performing block 640 may include the processing system 232 and/or the memory component 238 of the UE 202.
  • the UE may determine that the first voice service cam be provided.
  • Means for performing block 650 may include the processing system 232 and/or the memory component 238 of the UE 202.
  • the UE may provide the first voice service using the first packet session.
  • the UE may provide IMS services over the first PDU session established between the UE and the first network node.
  • Means for performing block 540 may include the processing system 232, the memory component 238 and/or the transceiver 208 of the UE 202.
  • the UE may attempt to provide voice service with a different network node of the same RAT.
  • the UE may trigger a cell reselection to a second network node of the same RAT as the first network node.
  • FIG. 7 illustrates a flow chart of an example process that may be performed by the UE to implement block 550.
  • the UE may add a tracking area of the first network to a forbidden tracking area list.
  • Means for performing block 710 may include the processing system 232 and/or the memory component 238 of the UE 202.
  • a tracking area may be identified by a tracking area code (TAC) and/or a tracking area identity (TAI) , and may include one or more network nodes as its members.
  • the UE may implement block 710 by adding the TAC and/or the TAI of the tracking area that has the first network node as one of its members to an FTAC_list_IMS.
  • the UE may trigger a cell reselection process to select the second network node.
  • the cell reselection may be such that any network nodes that members of tracking areas in the forbidden tracking area list are not considered.
  • Means for performing block 720 may include the processing system 232, the memory component 238 and/or the transceiver 208 of the UE 202.
  • the UE may send a tracking area update (TAU) request to a core network through the first network node.
  • the network may then respond by sending a measurement control order (MCO) to the UE to measure for other network nodes of the same RAT, e.g., measure for other gNBs.
  • MCO measurement control order
  • One of the measured network nodes may be selected. However, the network nodes included in the forbidden tracking area list would not be selected.
  • the UE may attach to the second network node in the SA mode.
  • the second network node may be of the same RAT as the first network node, e.g., the second network node may also be a gNB.
  • Means for performing block 560 may include the processing system 232, the memory component 238 and/or the transceiver 208 of the UE 202.
  • the UE may send a registration request to the second network node, and may receive a corresponding registration acceptance from the second network node.
  • the UE establish a second packet session with the second network node.
  • Means for performing block 570 may include the processing system 232, the memory component 238 and/or the transceiver 208 of the UE 202.
  • the second packet session may be a packet data unit (PDU) session between the UE and the second network node.
  • PDU packet data unit
  • the UE may send a PDU session establishment request to the second network node, and may receive a corresponding PDU session establishment acceptance from the second network node.
  • the UE may establish the PDU session for voice over packet service, e.g., by setting DNN to IMS in the PDU session establishment request.
  • the UE may provide a second voice service, i.e., provide a voice using the second packet session.
  • Means for performing block 580 may include the processing system 232, the memory component 238 and/or the transceiver 208 of the UE 202.
  • FIG. 8 illustrates a flow chart of an example process that may be performed by the UE to implement block 580.
  • the UE may send a voice service registration request to the second network node.
  • the voice service registration request may be a SIP request.
  • Means for performing block 810 may include the processing system 232, the memory component 238 and/or the transceiver 208 of the UE 202.
  • the UE may receive a corresponding a voice service registration response from the second network node.
  • the voice service registration response may be SIP response.
  • Means for performing block 820 may include the processing system 232, the memory component 238 and/or the transceiver 208 of the UE 202.
  • the UE may determine whether acceptance is indicated in the voice service registration response. For example, the UE may determine whether SIP response 200 or 202 is received. Means for performing block 830 may include the processing system 232 and/or the memory component 238 of the UE 202.
  • the UE may determine that the second voice service cannot be provided.
  • Means for performing block 840 may include the processing system 232 and/or the memory component 238 of the UE 202.
  • the UE may provide the second voice service.
  • Means for performing block 850 may include the processing system 232 and/or the memory component 238 of the UE 202.
  • the UE may coordinate with the second network node to exchange voice packets with each other using the second packet session.
  • FIG. 9 illustrates an example user equipment apparatus 900 represented as a series of interrelated functional modules connected by a common bus.
  • Each of the modules may be implemented in hardware or as a combination of hardware and software.
  • the modules may be implemented as any combination of the modules of the apparatus 202 of FIG. 2.
  • a module for registering with the first network node 910 may correspond at least in some aspects to a communication device (e.g., communication device 208) , a processing system (e.g., processing system 232) , and/or a memory component (e.g., memory component 238) .
  • a module for establishing first packet session 920 may correspond at least in some aspects to a communication device (e.g., communication device 208) , a processing system (e.g., processing system 232) , and/or a memory component (e.g., memory component 238) .
  • a module for determining whether first voice service can be provided 930 may correspond at least in some aspects to a processing system (e.g., processing system 232) and/or a memory component (e.g., memory component 238) .
  • a module for triggering a cell reselection to second node 940 correspond at least in some aspects to a communication device (e.g., communication device 208) , a processing system (e.g., processing system 232) , and/or a memory component (e.g., memory component 238) .
  • a module for registering with second network node 950 may correspond at least in some aspects to a communication device (e.g., communication device 208) , a processing system (e.g., processing system 232) , and/or a memory component (e.g., memory component 238) .
  • a module for establishing second packet session 960 may correspond at least in some aspects to a communication device (e.g., communication device 208) , a processing system (e.g., processing system 232) , and/or a memory component (e.g., memory component 238) .
  • a module for providing second voice service 970 may correspond at least in some aspects to a communication device (e.g., communication device 208) , a processing system (e.g., processing system 232) , and/or a memory component (e.g., memory component 238) .
  • the functionality of the modules of FIG. 9 may be implemented in various ways consistent with the teachings herein.
  • the functionality of these modules may be implemented as one or more electrical components.
  • the functionality of these blocks may be implemented as a processing system including one or more processor components.
  • the functionality of these modules may be implemented using, for example, at least a portion of one or more integrated circuits (e.g., an ASIC) .
  • an integrated circuit may include a processor, software, other related components, or some combination thereof.
  • the functionality of different modules may be implemented, for example, as different subsets of an integrated circuit, as different subsets of a set of software modules, or a combination thereof.
  • a given subset e.g., of an integrated circuit and/or of a set of software modules
  • FIG. 9 may be implemented using any suitable means. Such means also may be implemented, at least in part, using corresponding structure as taught herein.
  • the components described above in conjunction with the “module for” components of FIG. 9 also may correspond to similarly designated “means for” functionality.
  • one or more of such means may be implemented using one or more of processor components, integrated circuits, or other suitable structure as taught herein.
  • a general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • a software module may reside in random access memory (RAM) , flash memory, read-only memory (ROM) , erasable programmable ROM (EPROM) , electrically erasable programmable ROM (EEPROM) , registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium.
  • the storage medium may be integral to the processor.
  • the processor and the storage medium may reside in an ASIC.
  • the ASIC may reside in a user terminal (e.g., UE) .
  • the processor and the storage medium may reside as discrete components in a user terminal.
  • the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium.
  • Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a storage media may be any available media that can be accessed by a computer.
  • such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
  • 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 includes compact disc (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 should also be included within the scope of computer-readable media.

Landscapes

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

Abstract

L'invention concerne des techniques d'auto-adaptation pour récupérer à partir de défaillances d'appel de service par paquets en raison de limitations de réseau dans un réseau sans fil.
PCT/CN2020/091721 2020-05-22 2020-05-22 Récupération à partir d'une défaillance d'enregistrement de service de paquet voix WO2021232395A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/091721 WO2021232395A1 (fr) 2020-05-22 2020-05-22 Récupération à partir d'une défaillance d'enregistrement de service de paquet voix

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/091721 WO2021232395A1 (fr) 2020-05-22 2020-05-22 Récupération à partir d'une défaillance d'enregistrement de service de paquet voix

Publications (1)

Publication Number Publication Date
WO2021232395A1 true WO2021232395A1 (fr) 2021-11-25

Family

ID=78709001

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/091721 WO2021232395A1 (fr) 2020-05-22 2020-05-22 Récupération à partir d'une défaillance d'enregistrement de service de paquet voix

Country Status (1)

Country Link
WO (1) WO2021232395A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106489282A (zh) * 2014-07-07 2017-03-08 苹果公司 用于3gpp电路交换回退的过程
CN107105464A (zh) * 2016-02-22 2017-08-29 中兴通讯股份有限公司 一种网络切换的方法、装置及用户设备
US10178585B2 (en) * 2016-11-09 2019-01-08 Mediatek Inc. Enhanced multimedia call control in next generation mobile communication systems
CN109716742A (zh) * 2016-08-02 2019-05-03 诺基亚通信公司 在网络中提供语音呼叫支持
WO2019097498A1 (fr) * 2017-11-20 2019-05-23 Telefonaktiebolaget Lm Ericsson (Publ) Procédés et appareil de transfert ou de redirection

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106489282A (zh) * 2014-07-07 2017-03-08 苹果公司 用于3gpp电路交换回退的过程
CN107105464A (zh) * 2016-02-22 2017-08-29 中兴通讯股份有限公司 一种网络切换的方法、装置及用户设备
CN109716742A (zh) * 2016-08-02 2019-05-03 诺基亚通信公司 在网络中提供语音呼叫支持
US10178585B2 (en) * 2016-11-09 2019-01-08 Mediatek Inc. Enhanced multimedia call control in next generation mobile communication systems
WO2019097498A1 (fr) * 2017-11-20 2019-05-23 Telefonaktiebolaget Lm Ericsson (Publ) Procédés et appareil de transfert ou de redirection

Similar Documents

Publication Publication Date Title
US11785514B2 (en) Key performance indicator improvements in wireless communication
US9913191B2 (en) Base station and method for early handover using uplink channel characteristics
CN107079387B (zh) 无线电终端、无线电站及其方法
US11388637B1 (en) Cell selection for conditional handover
CN112335305B (zh) 下行信号的监听和发送方法、参数配置方法以及装置
KR20230107564A (ko) 포지셔닝 표시를 위한 랜덤 액세스 프리앰블
WO2021065748A1 (fr) Procédé et appareil pour effectuer un transfert d'un ue multi-usim à compatibilité radio sur des systèmes identiques ou différents
TWI594653B (zh) A method and apparatus for detecting the proximity of a user's device
WO2021237700A1 (fr) Auto-adaptation dans un réseau sans fil
US20230224806A1 (en) Recovery from authentication failure
WO2021237395A1 (fr) Déclenchement d'une procédure de rattachement après désactivation d'un mode de double connectivité avec nouvelle radio
WO2021248354A1 (fr) Relocalisation optimisée de fonctions d'accès et de mobilité dans des dispositifs avec multiples modules d'identité d'abonné
US20220150035A1 (en) Dynamic and semi-persistent scheduling mixed multi-panel uplink precoding
WO2021243510A1 (fr) Amélioration de la sélection de réseaux mobiles terrestres publics
WO2021223210A1 (fr) Rétablissement de support eps après un transfert intercellulaire
US20220248285A1 (en) Optimal cell changeover in multicell environment when conditional cell changeover is configured
US11323940B1 (en) Optimal interference handling in multicell environment when conditional cell changeover is configured
WO2022067474A1 (fr) Récupération améliorée d'une défaillance de liaison radio
WO2021232395A1 (fr) Récupération à partir d'une défaillance d'enregistrement de service de paquet voix
US10667297B2 (en) Mobility-aware contention procedures on a shared communication medium
WO2021223055A1 (fr) Auto-adaptation dans réseau sans fil
WO2021248258A1 (fr) Connexion stable de groupe de cellules secondaires
WO2021243691A1 (fr) Commutation rapide entre technologies d'accès radio dans les communications sans fil
WO2022087873A1 (fr) Optimisation de la fiabilité d'un appel d'urgence et du temps de réponse d'une session via la sélection d'un abonnement
WO2021237698A1 (fr) Service stable avec de multiples abonnements à des données

Legal Events

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

Ref document number: 20936393

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20936393

Country of ref document: EP

Kind code of ref document: A1