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WO2024222758A1 - Procédés et appareils pour des améliorations apportées à une procédure de strate de non-accès avec un satellite dans un mode de fonctionnement de stockage et de retransmission - Google Patents

Procédés et appareils pour des améliorations apportées à une procédure de strate de non-accès avec un satellite dans un mode de fonctionnement de stockage et de retransmission Download PDF

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Publication number
WO2024222758A1
WO2024222758A1 PCT/CN2024/089648 CN2024089648W WO2024222758A1 WO 2024222758 A1 WO2024222758 A1 WO 2024222758A1 CN 2024089648 W CN2024089648 W CN 2024089648W WO 2024222758 A1 WO2024222758 A1 WO 2024222758A1
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Prior art keywords
satellite
nas procedure
indication
nas
procedure
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English (en)
Inventor
Marko NIEMI
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MediaTek Singapore Pte Ltd
MediaTek Inc
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MediaTek Singapore Pte Ltd
MediaTek Inc
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Priority to CN202480020884.9A priority Critical patent/CN120982154A/zh
Publication of WO2024222758A1 publication Critical patent/WO2024222758A1/fr
Anticipated expiration legal-status Critical
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    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/06—Airborne or Satellite Networks

Definitions

  • the present disclosure is generally related to mobile communications and, more particularly, to enhancements on non-access stratum (NAS) procedures with a satellite in store-and-forward (S&F) operation mode.
  • NAS non-access stratum
  • S&F store-and-forward
  • non-terrestrial network is introduced as a terminal-satellite direct communication technology based on the Long-Term Evolution (LTE) or New Radio (NR) interface.
  • LTE Long-Term Evolution
  • NR New Radio
  • NTN may provide ubiquitous coverage without being restricted by terrain and landform.
  • satellites can be categorized into geostationary orbit (GEO) satellites, medium earth orbit (MEO) satellites, and low earth orbit (LEO) satellites.
  • GEO geostationary orbit
  • MEO medium earth orbit
  • LEO low earth orbit
  • FIG. 1 illustrates different satellite orbits in satellite communication.
  • GEO satellites are typically positioned at approximately 35786 kilometer (km) above the earth surface.
  • LEO satellites typically orbit around or below 2000 km above the earth surface.
  • MEO satellites typically orbit at altitudes higher than LEO but lower than GEO, ranging from around 2000 km to 35786 km above the earth surface.
  • a constellation generally refers to a group of satellites orbiting at a specific altitude.
  • a sparse LEO constellation may include tens of satellites to provide a certain level of satellite coverage in a way that it cannot offer continuous connectivity via the satellites to the ground stations (GS) .
  • GS ground stations
  • a satellite of a sparse LEO constellation may be equipped with base station (BS) and core network (CN) elements, allowing the satellite to offer a user equipment (UE) with partial CN services and uplink (UL) and downlink (DL) data services, e.g., by implementing a store-and-forward (S&F) type of functionality in the satellite.
  • BS base station
  • CN core network
  • a challenge for the S&F operation is that for security and/or capacity reasons, the satellite cannot carry on all network functions, such as home subscriber server (HSS) functions for managing subscriber information, and/or security functions for establishing NAS/AS security between the UE and the network.
  • HSS home subscriber server
  • security functions for establishing NAS/AS security between the UE and the network.
  • the S&F solution will impact existing NAS procedures, such as initial registration procedure in 5G and attach procedure in 4G, due to incomplete network functions in the satellite. Accordingly, how to enhance the NAS procedures with a satellite in the S&F operation mode has become an important issue for newly developed wireless communication systems.
  • An objective of the present disclosure is to propose solutions or schemes that address the aforementioned issue pertaining to enhancements on NAS procedures with a satellite in the S&F operation mode.
  • a method may involve an apparatus transmitting a request message for initiating a NAS procedure to a network node of a wireless network, wherein the network node comprises a first satellite.
  • the method may also involve the apparatus receiving a response message corresponding to the NAS procedure from the network node, wherein the response message comprises at least one of a first indication that the NAS procedure is not completed and a second indication for assisting the apparatus on subsequent re-attempts or resumptions of the NAS procedure.
  • an apparatus may comprise a transceiver which, during operation, wirelessly communicates with a network node of a wireless network.
  • the apparatus may also comprise a processor communicatively coupled to the transceiver.
  • the processor during operation, may perform operations comprising transmitting, via the transceiver, a request message for initiating a NAS procedure to the network node, wherein the network node comprises a first satellite.
  • the processor may also perform operations comprising receiving, via the transceiver, a response message corresponding to the NAS procedure from the network node, wherein the response message comprises at least one of a first indication that the NAS procedure is not completed and a second indication for assisting the apparatus on subsequent re-attempts or resumptions of the NAS procedure.
  • a method may involve a network node receiving a request message for initiating a NAS procedure from an apparatus, wherein the network node comprises a first satellite. The method may also involve the network node transmitting a response message corresponding to the NAS procedure to the apparatus, wherein the response message comprises at least one of a first indication that the NAS procedure is not completed and a second indication for assisting the apparatus on subsequent re-attempts or resumptions of the NAS procedure.
  • LTE Long-Term Evolution
  • LTE-Advanced Long-Term Evolution-Advanced
  • LTE-Advanced Pro 5th Generation
  • NR New Radio
  • IoT Internet-of-Things
  • NB-IoT Narrow Band Internet of Things
  • IIoT Industrial Internet of Things
  • B5G beyond 5G
  • 6G 6th Generation
  • the proposed concepts, schemes and any variation (s) /derivative (s) thereof may be implemented in, for and by other types of radio access technologies, networks and network topologies.
  • the scope of the present disclosure is not limited to the examples described herein.
  • FIG. 1 is a diagram depicting different satellite orbits in satellite communication.
  • FIG. 2 is a diagram depicting an example scenario of a communication environment in which various solutions and schemes in accordance with the present disclosure may be implemented.
  • FIGs. 3A and 3B show a diagram depicting an example scenario of an enhanced NAS procedure with a satellite in the S&F operation mode in accordance with an implementation of the present disclosure.
  • FIG. 4 is a diagram depicting an example scenario of an evolved packet system (EPS) mobility management (EMM) or 5G mobility management (5GMM) information element (IE) for carrying the re-attempt assistance information in accordance with an implementation of the present disclosure.
  • EPS evolved packet system
  • EMM evolved packet system
  • 5GMM 5G mobility management
  • IE information element
  • FIG. 5 is a block diagram of an example communication system in accordance with an implementation of the present disclosure.
  • FIG. 6 is a flowchart of an example process in accordance with an implementation of the present disclosure.
  • FIG. 7 is a flowchart of another example process in accordance with an implementation of the present disclosure.
  • Implementations in accordance with the present disclosure relate to various techniques, methods, schemes and/or solutions pertaining to enhancements on NAS procedures with a satellite in the S&F operation mode.
  • a number of possible solutions may be implemented separately or jointly. That is, although these possible solutions may be described below separately, two or more of these possible solutions may be implemented in one combination or another.
  • FIG. 2 illustrates an example scenario 200 of a communication environment in which various solutions and schemes in accordance with the present disclosure may be implemented.
  • Scenario 200 involves a UE 210 in wireless communication with a network 220 (e.g., a wireless network including an NTN and a TN) via a terrestrial network node 222 (e.g., an evolved Node-B (eNB) , a Next Generation Node-B (gNB) , or a transmission/reception point (TRP) ) and/or a non-terrestrial network node 224 (e.g., a satellite) .
  • a network 220 e.g., a wireless network including an NTN and a TN
  • a terrestrial network node 222 e.g., an evolved Node-B (eNB) , a Next Generation Node-B (gNB) , or a transmission/reception point (TRP)
  • a non-terrestrial network node 224 e.g.
  • the UE 210 may be an IoT device such as an NB-IoT UE or an eMTC UE (e.g., a bandwidth reduced low complexity (BL) UE or a coverage enhancement (CE) UE) .
  • the non-terrestrial network node 224 may operate in the S&F operation mode to form a satellite cell for wireless communication with the UE 210 through the feeder link to the GS, e.g., the terrestrial network node 222.
  • the non-terrestrial network node 224 may include one or more satellites of a (sparse LEO) constellation, and each satellite may be equipped with some eNB/gNB and CN functions/elements (e.g., without the HSS functions for managing subscriber information and/or the security functions for establishing NAS/AS security between the UE 210 and the network 220) to offer the UE 210 with partial CN services and UL and DL data service by implementing the S&F type of functionality in the satellite.
  • eNB/gNB and CN functions/elements e.g., without the HSS functions for managing subscriber information and/or the security functions for establishing NAS/AS security between the UE 210 and the network 220
  • the UE 210, the network 220, the terrestrial network node 222, and the non-terrestrial network node 224 may implement various schemes pertaining to enhancements on NAS procedures with a satellite in the S&F operation mode in accordance with the present disclosure, as described below. It is noteworthy that, while the various proposed schemes may be individually or separately described below, in actual implementations some or all of the proposed schemes may be utilized or otherwise implemented jointly. Of course, each of the proposed schemes may be utilized or otherwise implemented individually or separately.
  • NTN refers to a network that uses radio frequency (RF) and information processing resources carried on high, medium and low orbit satellites or other high-altitude communication platforms to provide communication services for UEs.
  • RF radio frequency
  • the satellite According to the load capacity on the satellite, there are two typical scenarios, namely: transparent payload and regenerative payload.
  • transparent payload mode the satellite does not process the signal and waveform in the communication service but, rather, only functions as an RF amplifier to forward data.
  • regenerative payload mode the satellite, other than RF amplification, also has the processing capabilities of modulation/demodulation, coding/decoding, switching, routing and so on.
  • the satellite may not carry on all network functions, some impacts to the existing NAS procedures may be incurred.
  • a new subscriber e.g., a UE
  • the initial registration/attach procedure would need to be divided in two or more phases.
  • the first phase e.g., first fly-over
  • the UE is allowed to start the initial registration/attach procedure with the satellite identifying the UE.
  • the second phase e.g., a second fly-over after the UE information is uploaded to the satellite
  • the UE is allowed to start the initial registration/attach procedure again to complete the procedure.
  • the details of the NAS procedures with a satellite in the S&F operation mode have not been fully discussed yet.
  • a UE may transmit a request message (e.g., an ATTACH REQUEST message, or a REGISTRATION REQUEST message) for initiating a NAS procedure (e.g., an attach procedure in LTE system, or an initial registration procedure in NR system) to a network node of a wireless network, wherein the network node includes a satellite operating in the S&F operation mode.
  • a request message e.g., an ATTACH REQUEST message, or a REGISTRATION REQUEST message
  • a NAS procedure e.g., an attach procedure in LTE system, or an initial registration procedure in NR system
  • the UE may receive a response message corresponding to the NAS procedure from the network node, wherein the response message includes at least one of a first indication (e.g., a reject cause) that the NAS procedure is not completed and a second indication for assisting the UE on subsequent re-attempts or resumptions of the NAS procedure.
  • the UE may suspend/terminate the NAS procedure based on the first indication, and re-attempt/resume the NAS procedure based on the second indication.
  • a network node including a satellite operating in the S&F operation mode, it may receive the request message for initiating the NAS procedure from the UE.
  • the network node may transmit the response message corresponding to the NAS procedure to the UE, wherein the response message includes at least one of the first indication that the NAS procedure is not completed and the second indication for assisting the UE on subsequent re-attempts or resumptions of the NAS procedure. Accordingly, by applying the schemes of the present disclosure, the NAS procedures with a satellite in the S&F operation mode may be enhanced to allow the NAS procedures to be properly handled and completed successfully.
  • FIGs. 3A and 3B illustrate an example scenario 300 of an enhanced NAS procedure with a satellite in the S&F operation mode in accordance with an implementation of the present disclosure.
  • Scenario 300 involves a UE in wireless communication with a multi-satellite (IoT) NTN. It is assumed that, initially, the UE is switched on and needs to register with the network, but the (terrestrial) home public land mobile network (PLMN) of the UE is not found and the UE starts the search for a satellite cell.
  • the first satellite (denoted as SAT#i) comes within the communication range of the UE, i.e., the cell of SAT#i is detected by the UE.
  • the UE may acquire, among others, the PLMN and the two-line element sets (TLEs) of multiple satellites of the constellation (e.g., from system information block type 32 (SIB32) ) .
  • the UE may also learn from system information block type 31 (SIB31) or SIB32 that the satellite cell is operating in the S&F operation mode.
  • the UE initiates the initial registration/attach procedure by transmitting a REGISTRATION/ATTACH REQUEST message.
  • the UE may include its capability information indicating the UE’s ability to handle S&F operations (e.g., by an “S&F feature supported” flag) .
  • the first satellite rejects the initial registration/attach procedure because the UE’s subscription data, such as E-UTRAN Authentication Vector (AV) , is absent on board the satellite due to the lack of a currently active feeder link to the GS for subscription data retrieval during this satellite pass.
  • subscription data such as E-UTRAN Authentication Vector (AV)
  • the first satellite rejects the initial registration/attach procedure by transmitting a REGISTRATION/ATTACH REJECT message to the UE, and the REGISTRATION/ATTACH REJECT message includes at least a new reject cause (e.g., for indicating that the NAS procedure is not completed due to S&F operation) and a re-attempt assistance information (i.e., an indication for assisting the UE on subsequent re-attempts or resumptions of the NAS procedure) .
  • the re-attempt assistance information includes a value of a timer for indicating when the UE is allowed to re-attempt or resume the NAS procedure.
  • step 304 the UE suspends/terminates the initial registration/attach procedure, and starts the timer with the value and the UE is not allowed to re-attempt or resume the NAS procedure before the timer expires.
  • step 305 the second satellite (denoted as SAT#j) comes within the communication range of the UE.
  • the second satellite is assumed to be operating in the S&F operation mode and have no subscription information (e.g. E-UTRAN AVs) on board either to be able to resume/complete the attach registration with the UE.
  • the UE may identify that this satellite cell belongs to the same PLMN as the cell where it previously attempted the initial registration/attach procedure, and learn from broadcast system information that the second satellite is operating in S&F mode. In this scenario, the UE does not trigger re-attempt or resumption of the initial registration/attach procedure because the second satellite is operating in the S&F operation mode and the timer has not yet expired.
  • step 306 the timer expires on the UE. From this point on, the UE knows that the initial registration/attach procedure can be re-attempted or resumed in any upcoming satellite cell of the PLMN. Subsequently, in step S307, the third satellite (denoted as SAT#k) comes within the communication range of the UE. In step 308, responsive to detecting the cell of the third satellite after the timer expires, the UE re-attempts or resumes the initial registration/attach procedure in the third satellite since that the timer is already expired. Specifically, the UE re-attempts or resumes the initial registration/attach procedure by transmitting a REGISTRATION/ATTACH REQUEST message.
  • the first satellite gets connected to the GS via the feeder link, such that the first satellite may exchange information with the ground network to obtain the UE’s subscription information (e.g. E-UTRAN AVs) .
  • the third satellite also gets connected to the GS via the feeder link and the E-UTRAN AVs for the subscriber/UE are also uploaded to the third satellite, given that the third satellite is expected to fly over the area where the UE may re-attempt/resume the initial registration/attach procedure after the timer expires.
  • step 309 the authentication and security setup processes are performed and completed successfully, given that the third satellite has the UE’s subscription information.
  • the third satellite accepts the initial registration/attach procedure by transmitting a REGISTRATION/ATTACH ACCEPT message to the UE.
  • the UE replies to the third satellite with a REGISTRATION/ATTACH COMPLETE message, and the initial registration/accept procedure is completed successfully. After that, the UE is able to obtain UL/DL data services from the multi-satellite (IoT) NTN.
  • IoT multi-satellite
  • the re-attempt assistance information may include/indicate at least one of the following: (i) a value of the timer for indicating when the UE is allowed to re-attempt or resume the NAS procedure; (ii) a number of satellites in sequence that the UE needs to wait before re-attempting or resuming the NAS procedure; and (iii) a satellite identifier (ID) for indicating in which satellite the UE is allowed to re-attempt or resume the NAS procedure.
  • ID satellite identifier
  • the UE may determine to re-attempt or resume the NAS procedure only in a satellite with the number of satellites next to the satellite where the NAS procedure is rejected.
  • the EMM/5GMM IE indicates value 1, it means that the next satellite can serve the UE to complete the NAS procedure; if the EMM/5GMM IE indicates value 3, it means that the third satellite after the current satellite can serve the UE to complete the NAS procedure; or if the EMM/5GMM IE indicates value 4, it means that the UE should re-attempt or resume the NAS procedure when the 4 th satellite after the current satellite becomes available.
  • the UE may determine the satellite ID of a detected/available satellite based on the satellite assistance information (e.g., ephemeris data or satellite in-coverage or out-of-coverage information) in the broadcast system information of the detected/available satellite, and only re-attempt or resume the NAS procedure when the satellite ID in the satellite assistance information matches with the satellite ID in the re-attempt assistance information.
  • the broadcast system information may include at least one of a SIB31, a SIB 31-narrowband (SIB31-NB) , a SIB32, and a SIB32-NB.
  • FIG. 4 illustrates an example scenario 400 of an EMM/5GMM IE for carrying the re-attempt assistance information in accordance with an implementation of the present disclosure.
  • Scenario 400 involves a general packet radio service (GPRS) timer IE (re) used to carry the re-attempt assistance information.
  • GPRS general packet radio service
  • Part (A) of FIG. 4 depicts the format of the GPRS timer IE, which includes 2 octets in total.
  • Part (B) of FIG. 4 depicts the representations for the coded values of the bits in the second octet of the GPRS timer IE. As shown in part (B) of FIG.
  • bits 6 to 8 in the second octet of the GPRS timer IE defines the timer value unit for the GPRS timer, and bits 5 to 1 in the second octet of the GPRS timer IE can be coded to provide the re-attempt assistance information.
  • the entire second octet of the GPRS timer IE can be coded to provide the re-attempt assistance information.
  • the UE may re-attempt/resume the NAS procedure with the 7 th satellite (in sequence) that becomes available at the UE’s location.
  • the UE may re-attempt/resume the NAS procedure when it is in coverage of satellite#117.
  • the GPRS timer IE is used as an exemplary EMM/5GMM IE to carry the re-attempt assistance information
  • EMM/5GMM IEs such as a new IE or another existing IE can be used instead to carry the re-attempt assistance information, and the present disclosure is not limited thereto.
  • FIG. 5 illustrates an example communication system 500 having an example communication apparatus 510 and an example network apparatus 520 in accordance with an implementation of the present disclosure.
  • Each of communication apparatus 510 and network apparatus 520 may perform various functions to implement schemes, techniques, processes and methods described herein pertaining to enhancements on NAS procedures with a satellite in the S&F operation mode, including scenarios/schemes described above as well as processes 600 and 700 described below.
  • Communication apparatus 510 may be a part of an electronic apparatus, which may be a UE such as a portable or mobile apparatus, a wearable apparatus, a wireless communication apparatus or a computing apparatus.
  • communication apparatus 510 may be implemented in a smartphone, a smartwatch, a personal digital assistant, an electronic control unit (ECU) in a vehicle, a digital camera, or a computing equipment such as a tablet computer, a laptop computer or a notebook computer.
  • ECU electronice control unit
  • Communication apparatus 510 may also be a part of a machine type apparatus, which may be an IoT, NB-IoT, IIoT, BL, or CE UE such as an immobile or a stationary apparatus, a home apparatus, a roadside unit (RSU) , a wire communication apparatus or a computing apparatus.
  • communication apparatus 510 may be implemented in a smart thermostat, a smart fridge, a smart door lock, a wireless speaker or a home control center.
  • communication apparatus 510 may be implemented in the form of one or more integrated-circuit (IC) chips such as, for example and without limitation, one or more single-core processors, one or more multi-core processors, one or more reduced-instruction set computing (RISC) processors, or one or more complex-instruction-set-computing (CISC) processors.
  • Communication apparatus 510 may include at least some of those components shown in FIG. 5 such as a processor 512, for example.
  • Communication apparatus 510 may further include one or more other components not pertinent to the proposed scheme of the present disclosure (e.g., internal power supply, display device and/or user interface device) , and, thus, such component (s) of communication apparatus 510 are neither shown in FIG. 5 nor described below in the interest of simplicity and brevity.
  • Network apparatus 520 may be a part of an electronic apparatus, which may be a network node such as a satellite, a BS, a small cell, a router or a gateway of an (IoT) NTN.
  • network apparatus 520 may be implemented in a satellite operating in the S&F operation mode.
  • network apparatus 520 may be implemented in the form of one or more IC chips such as, for example and without limitation, one or more single-core processors, one or more multi-core processors, or one or more RISC or CISC processors.
  • Network apparatus 520 may include at least some of those components shown in FIG. 5 such as a processor 522, for example.
  • Network apparatus 520 may further include one or more other components not pertinent to the proposed scheme of the present disclosure (e.g., internal power supply, display device and/or user interface device) , and, thus, such component (s) of network apparatus 520 are neither shown in FIG. 5 nor described below in the interest of simplicity and brevity.
  • components not pertinent to the proposed scheme of the present disclosure e.g., internal power supply, display device and/or user interface device
  • each of processor 512 and processor 522 may be implemented in the form of one or more single-core processors, one or more multi-core processors, or one or more CISC processors. That is, even though a singular term “aprocessor” is used herein to refer to processor 512 and processor 522, each of processor 512 and processor 522 may include multiple processors in some implementations and a single processor in other implementations in accordance with the present disclosure.
  • each of processor 512 and processor 522 may be implemented in the form of hardware (and, optionally, firmware) with electronic components including, for example and without limitation, one or more transistors, one or more diodes, one or more capacitors, one or more resistors, one or more inductors, one or more memristors and/or one or more varactors that are configured and arranged to achieve specific purposes in accordance with the present disclosure.
  • each of processor 512 and processor 522 is a special-purpose machine specifically designed, arranged and configured to perform specific tasks, including enhancements on NAS procedures with a satellite in the S&F operation mode, in a UE (e.g., as represented by communication apparatus 510) and a network node (e.g., as represented by network apparatus 520) in accordance with various implementations of the present disclosure.
  • communication apparatus 510 may also include a transceiver 516 coupled to processor 512 and capable of wirelessly transmitting and receiving data.
  • transceiver 516 may be capable of wirelessly communicating with different types of UEs and/or wireless networks of different radio access technologies (RATs) .
  • RATs radio access technologies
  • transceiver 516 may be equipped with a plurality of antenna ports (not shown) such as, for example, four antenna ports. That is, transceiver 516 may be equipped with multiple transmit antennas and multiple receive antennas for multiple-input multiple-output (MIMO) wireless communications.
  • network apparatus 520 may also include a transceiver 526 coupled to processor 522.
  • Transceiver 526 may include a transceiver capable of wirelessly transmitting and receiving data.
  • transceiver 526 may be capable of wirelessly communicating with different types of UEs of different RATs.
  • transceiver 526 may be equipped with a plurality of antenna ports (not shown) such as, for example, four antenna ports. That is, transceiver 526 may be equipped with multiple transmit antennas and multiple receive antennas for MIMO wireless communications.
  • communication apparatus 510 may further include a memory 514 coupled to processor 512 and capable of being accessed by processor 512 and storing data therein.
  • network apparatus 520 may further include a memory 524 coupled to processor 522 and capable of being accessed by processor 522 and storing data therein.
  • RAM random-access memory
  • DRAM dynamic RAM
  • SRAM static RAM
  • T-RAM thyristor RAM
  • Z-RAM zero-capacitor RAM
  • each of memory 514 and memory 524 may include a type of read-only memory (ROM) such as mask ROM, programmable ROM (PROM) , erasable programmable ROM (EPROM) and/or electrically erasable programmable ROM (EEPROM) .
  • ROM read-only memory
  • PROM programmable ROM
  • EPROM erasable programmable ROM
  • EEPROM electrically erasable programmable ROM
  • each of memory 514 and memory 524 may include a type of non-volatile random-access memory (NVRAM) such as flash memory, solid-state memory, ferroelectric RAM (FeRAM) , magnetoresistive RAM (MRAM) and/or phase-change memory.
  • NVRAM non-volatile random-access memory
  • Each of communication apparatus 510 and network apparatus 520 may be a communication entity capable of communicating with each other using various proposed schemes in accordance with the present disclosure.
  • a description of capabilities of communication apparatus 510, as a UE (e.g., a IoT UE such as an NB-IoT UE or a BL/CE UE) , and network apparatus 520, as a network node (e.g., a satellite) is provided below.
  • processor 512 of communication apparatus 510 may transmit, via transceiver 516, a request message for initiating a NAS procedure to network apparatus 520, wherein network apparatus 520 includes a first satellite. Then, processor 512 may receive, via transceiver 516, a response message corresponding to the NAS procedure from network apparatus 520, wherein the response message comprises at least one of a first indication that the NAS procedure is not completed and a second indication for assisting communication apparatus 510 on subsequent re-attempts or resumptions of the NAS procedure.
  • processor 512 may also suspend or terminate the NAS procedure based on the first indication, and re-attempt or resume the NAS procedure based on the second indication.
  • the first indication may be a reject cause.
  • first satellite may be operating in an S&F operation mode.
  • the second indication may include a value of a timer for indicating when communication apparatus 510 is allowed to re-attempt or resume the NAS procedure. Additionally, processor 512 may also start the timer with the value responsive to receiving the response message, wherein the re-attempting or resuming of the NAS procedure is performed after the timer expires.
  • the second indication may indicate a number of satellites in sequence that communication apparatus 510 needs to wait before re- attempting or resuming the NAS procedure. Additionally, processor 512 may also determine a second satellite with the number of satellites next to the first satellite, wherein the re-attempting or resuming of the NAS procedure is performed in an event that a second satellite is available at a location of communication apparatus 510.
  • processor 512 may also receive broadcast system information from network apparatus 520, wherein the broadcast system information includes satellite assistance information and the second satellite is determined based on the satellite assistance information.
  • the broadcast system information may include a SIB31, a SIB31-NB, a SIB32, or a SIB32-NB.
  • the satellite assistance information may include ephemeris data or satellite in-coverage or out-of-coverage information.
  • the second indication may include a satellite ID for indicating in which satellite communication apparatus 510 is allowed to re-attempt or resume the NAS procedure, and the re-attempting or resuming of the NAS procedure is performed in an event that a second satellite associated with the satellite ID is available at a location of communication apparatus 510.
  • processor 522 of network apparatus 520 may receive, via transceiver 526, a request message for initiating a NAS procedure from communication apparatus 510, wherein network apparatus 520 includes a first satellite. Then, processor 522 may transmit, via transceiver 526, a response message corresponding to the NAS procedure to communication apparatus 510, wherein the response message includes at least one of a first indication that the NAS procedure is not completed and a second indication for assisting communication apparatus 510 on subsequent re-attempts or resumptions of the NAS procedure.
  • the first satellite may be operating in an S&F operation mode.
  • the first indication may be a reject cause
  • the second indication may include at least one of the following: (i) a value of a timer for indicating when communication apparatus 510 is allowed to re-attempt or resume the NAS procedure; (ii) a number of satellites in sequence that communication apparatus 510 needs to wait before re-attempting or resuming the NAS procedure; and (iii) a satellite ID for indicating in which satellite communication apparatus 510 is allowed to re-attempt or resume the NAS procedure.
  • processor 522 may also transmit, via transceiver 526, broadcast system information to communication apparatus 510, wherein the broadcast system information includes satellite assistance information.
  • the broadcast system information may include a SIB31, a SIB31-NB, a SIB32, or a SIB32-NB
  • the satellite assistance information may include ephemeris data or satellite in-coverage or out-of-coverage information.
  • FIG. 6 illustrates an example process 600 in accordance with an implementation of the present disclosure.
  • Process 600 may be an example implementation of above scenarios/schemes, whether partially or completely, with respect to enhancements on NAS procedures with a satellite in the S&F operation mode.
  • Process 600 may represent an aspect of implementation of features of communication apparatus 510.
  • Process 600 may include one or more operations, actions, or functions as illustrated by one or more of blocks 610 and 620. Although illustrated as discrete blocks, various blocks of process 600 may be divided into additional blocks, combined into fewer blocks, or eliminated, depending on the desired implementation. Moreover, the blocks of process 600 may be executed in the order shown in FIG. 6 or, alternatively, in a different order.
  • Process 600 may be implemented by or in communication apparatus 510 or any suitable UE or machine type devices. Solely for illustrative purposes and without limitation, process 600 is described below in the context of communication apparatus 510 as a UE and network apparatus 520 as a network node. Process 600 may begin at block 610.
  • process 600 may involve processor 512 of communication apparatus 510 transmitting, via transceiver 516, a request message for initiating a NAS procedure to network apparatus 520, wherein network apparatus 520 includes a first satellite.
  • Process 600 may proceed from 610 to 620.
  • process 600 may involve processor 512 receiving, via transceiver 516, a response message corresponding to the NAS procedure from network apparatus 520, wherein the response message includes at least one of a first indication that the NAS procedure is not completed and a second indication for assisting communication apparatus 510 on subsequent re-attempts or resumptions of the NAS procedure.
  • process 600 may further involve processor 512 suspending or terminating the NAS procedure based on the first indication, and re-attempting or resuming the NAS procedure based on the second indication.
  • the first indication may be a reject cause.
  • the first satellite may be operating in an S&F operation mode.
  • the second indication may include a value of a timer for indicating when communication apparatus 510 is allowed to re-attempt or resume the NAS procedure. Additionally, process 600 may further involve processor 512 starting the timer with the value responsive to receiving the response message, wherein the re-attempting or resuming of the NAS procedure is performed after the timer expires.
  • the second indication may indicate a number of satellites in sequence that communication apparatus 510 needs to wait before re-attempting or resuming the NAS procedure. Additionally, process 600 may further involve processor 512 determining a second satellite with the number of satellites next to the first satellite, wherein the re-attempting or resuming of the NAS procedure is performed in an event that a second satellite is available at a location of communication apparatus 510.
  • process 600 may further involve processor 512 receiving, via transceiver 516, broadcast system information from network apparatus 520, wherein the broadcast system information includes satellite assistance information and the second satellite is determined based on the satellite assistance information.
  • the broadcast system information may include a SIB31, a SIB31-NB, a SIB32, or a SIB32-NB.
  • the satellite assistance information may include ephemeris data or satellite in-coverage or out-of-coverage information.
  • the second indication may include a satellite ID for indicating in which satellite communication apparatus 510 is allowed to re-attempt or resume the NAS procedure, and the re-attempting or resuming of the NAS procedure is performed in an event that a second satellite associated with the satellite ID is available at a location of communication apparatus 510.
  • FIG. 7 illustrates an example process 700 in accordance with an implementation of the present disclosure.
  • Process 700 may be an example implementation of above scenarios/schemes, whether partially or completely, with respect to enhancements on NAS procedures with a satellite in the S&F operation mode.
  • Process 700 may represent an aspect of implementation of features of network apparatus 520.
  • Process 700 may include one or more operations, actions, or functions as illustrated by one or more of blocks 710 and 720. Although illustrated as discrete blocks, various blocks of process 700 may be divided into additional blocks, combined into fewer blocks, or eliminated, depending on the desired implementation. Moreover, the blocks of process 700 may be executed in the order shown in FIG. 7 or, alternatively, in a different order.
  • Process 700 may be implemented by or in network apparatus 520 as well as any variations thereof. Solely for illustrative purposes and without limitation, process 700 is described below in the context of communication apparatus 510 as a UE and network apparatus 520 as a network node. Process 700 may begin at block 710.
  • process 700 may involve processor 522 of network apparatus 520 receiving, via transceiver 526, a request message for initiating a NAS procedure from communication apparatus 510, wherein network apparatus 520 includes a first satellite.
  • Process 700 may proceed from 710 to 720.
  • process 700 may involve processor 522 transmitting, via transceiver 526, a response message corresponding to the NAS procedure to communication apparatus 510, wherein the response message includes at least one of a first indication that the NAS procedure is not completed and a second indication for assisting communication apparatus 510 on subsequent re-attempts or resumptions of the NAS procedure.
  • the first satellite may be operating in an S&F operation mode.
  • the first indication may be a reject cause.
  • the second indication may include a value of a timer for indicating when communication apparatus 510 is allowed to re-attempt or resume the NAS procedure.
  • the second indication may indicate a number of satellites in sequence that communication apparatus 510 needs to wait before re-attempting or resuming the NAS procedure.
  • process 700 may further involve processor 522 transmitting, via transceiver 526, broadcast system information to communication apparatus 510, wherein the broadcast system information includes satellite assistance information.
  • the broadcast system information may include a SIB31, a SIB31-NB, a SIB32, or a SIB32-NB
  • the satellite assistance information may include ephemeris data or satellite in-coverage or out-of-coverage information.
  • the second indication may include a satellite ID for indicating in which satellite communication apparatus 510 is allowed to re-attempt or resume the NAS procedure.
  • any two components so associated can also be viewed as being “operably connected” , or “operably coupled” , to each other to achieve the desired functionality, and any two components capable of being so associated can also be viewed as being “operably couplable” , to each other to achieve the desired functionality.
  • operably couplable include but are not limited to physically mateable and/or physically interacting components and/or wirelessly interactable and/or wirelessly interacting components and/or logically interacting and/or logically interactable components.

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

Abstract

L'invention concerne diverses solutions pour des améliorations apportées aux procédures de strate de non-accès (NAS) avec un satellite dans un mode de fonctionnement de stockage et de retransmission (S&F). Un appareil peut transmettre un message de demande pour initier une procédure NAS à un nœud de réseau d'un réseau sans fil. Le nœud de réseau comprend un premier satellite. Ensuite, l'appareil peut recevoir un message de réponse correspondant à la procédure NAS en provenance du nœud de réseau. Le message de réponse comprend une première indication selon laquelle la procédure NAS n'est pas achevée et/ou une seconde indication pour aider l'appareil à des tentatives ou des reprise ultérieures de la procédure NAS.
PCT/CN2024/089648 2023-04-24 2024-04-24 Procédés et appareils pour des améliorations apportées à une procédure de strate de non-accès avec un satellite dans un mode de fonctionnement de stockage et de retransmission Pending WO2024222758A1 (fr)

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CN202480020884.9A CN120982154A (zh) 2023-04-24 2024-04-24 用于卫星在s&f操作模式下增强非接入层进程的方法及其装置

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US63/497,765 2023-04-24

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112088542A (zh) * 2018-05-07 2020-12-15 瑞典爱立信有限公司 用于处置拒绝时的无线电接入网通知区域（rna）更新配置的方法和设备
CN115297431A (zh) * 2022-08-05 2022-11-04 中国电信股份有限公司 用于5g卫星接入的位置验证方法及装置、系统
CN115348639A (zh) * 2021-05-12 2022-11-15 苹果公司 非陆地网络中的网络选择

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112088542A (zh) * 2018-05-07 2020-12-15 瑞典爱立信有限公司 用于处置拒绝时的无线电接入网通知区域（rna）更新配置的方法和设备
CN115348639A (zh) * 2021-05-12 2022-11-15 苹果公司 非陆地网络中的网络选择
CN115297431A (zh) * 2022-08-05 2022-11-04 中国电信股份有限公司 用于5g卫星接入的位置验证方法及装置、系统

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CHINA MOBILE, NOKIA, NOKIA SHANGHAI BELL: "Adding requirements to 5GMM procedures for satellite access on informing of the rejection cause and the country", 3GPP DRAFT; C1-212063, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. CT WG1, no. Electronic meeting; 20210419 - 20210423, 12 April 2021 (2021-04-12), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051994845 *
QUALCOMM INCORPORATED: "Discussion of Mobility Registration Update to support NR Satellite Access", 3GPP DRAFT; S2-2102433, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. SA WG2, no. e-Meeting; 20210412 - 20210416, 6 April 2021 (2021-04-06), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051993809 *

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