WO2022135517A1 - Procédé exécuté par un équipement utilisateur et équipement utilisateur - Google Patents

Procédé exécuté par un équipement utilisateur et équipement utilisateur Download PDF

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Publication number
WO2022135517A1
WO2022135517A1 PCT/CN2021/140791 CN2021140791W WO2022135517A1 WO 2022135517 A1 WO2022135517 A1 WO 2022135517A1 CN 2021140791 W CN2021140791 W CN 2021140791W WO 2022135517 A1 WO2022135517 A1 WO 2022135517A1
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WO
WIPO (PCT)
Prior art keywords
user equipment
rrc connection
connection recovery
data transmission
small data
Prior art date
Application number
PCT/CN2021/140791
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English (en)
Chinese (zh)
Inventor
张崇铭
刘仁茂
Original Assignee
夏普株式会社
张崇铭
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 夏普株式会社, 张崇铭 filed Critical 夏普株式会社
Publication of WO2022135517A1 publication Critical patent/WO2022135517A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states

Definitions

  • the present invention relates to the technical field of wireless communication, and more particularly, the present invention relates to a method performed by a user equipment and a corresponding base station and user equipment.
  • the UE entering the RRC inactive state can send a transmission block ( Transport Block).
  • This transmission method may be referred to as PUR transmission.
  • a transport block carrying user data may also be sent in message 3 or message A. Both ways can be referred to as small data transfers.
  • the upper layer of the UE may request the UE to resume the RRC connection (request resumption of an RRC connection).
  • the UE can send a MAC PDU in the PUR or random access process, and the MAC PDU carries the RRC connection recovery request message and user data.
  • Such an RRC connection restoration procedure may be referred to as an RRC connection restoration procedure for small data transmission (or as a small data transmission-triggered RRC connection restoration procedure).
  • the UE may trigger a new RRC connection restoration process again. Then, how to operate the newly triggered RRC connection recovery process is a problem that needs to be solved.
  • the present invention provides a method performed by a user equipment and the user equipment, which are used to solve the problem that the UE triggers a new RRC again during the process of performing the RRC connection recovery for small data transmission. The question of how to proceed during the connection recovery process.
  • a method performed by a user equipment comprising: the user equipment initiates an RRC connection recovery procedure; the user equipment performs access control, and determines whether an access attempt is prohibited or allowed; When the user equipment determines that the access attempt is allowed, the user equipment determines whether there is an ongoing RRC connection recovery procedure for small data transmission; and when the user equipment determines that there is an ongoing RRC connection recovery procedure for small data transmission During the RRC connection recovery process for data transmission, the user equipment performs a fallback operation or generates a fallback instruction for the user equipment to perform the fallback operation.
  • the user equipment determines whether the access attempt is prohibited or allowed according to the access type and the access identifier.
  • the user equipment preferably, when the user equipment determines that the access attempt is prohibited, the user equipment ends or stops the RRC connection recovery process.
  • the user equipment determines whether there is an ongoing RRC connection recovery process for small data transmission by judging whether the timer is running.
  • the fallback operation performed by the user equipment is one or more of the following operations: delete keys that have been generated or acquired; rebuild for SRB and DRB RLC entity; suspend SRBs and DRBs except SRB0; configure the bottom layer, stop integrity protection and encryption protection; reset the MAC layer; stop the timer; restart the timer.
  • the user equipment preferably, when the user equipment determines that there is an ongoing RRC connection recovery process for small data transmission, the user equipment further performs the following operation: start the transmission of RRC Recovery request message.
  • the user equipment when the user equipment determines that there is no ongoing RRC connection recovery process for small data transmission, the user equipment performs one of the following operations or Multiple: adopt the value of the layer 1 parameter provided in the system information block or the value of the default layer 1 parameter of the UE, wherein the layer 1 parameter is the initial system bandwidth segment or the timing advance offset; adopt the default value of the UE The configuration of the SRB1; adopt the default MAC cell group configuration of the UE; start the transmission of the RRC recovery request message.
  • a user equipment comprising: a processor; and a memory storing instructions; wherein the instructions execute any of the above methods when executed by the processor.
  • the method performed by the user equipment and the user equipment according to the present invention it is possible to solve the problem of how the UE operates when a new RRC connection restoration process is triggered again during the process of performing the RRC connection restoration for small data transmission.
  • FIG. 1 is a flowchart showing a method executed by a user equipment according to the present invention.
  • FIG. 2 is a block diagram showing a schematic configuration of a user equipment according to the present invention.
  • the NR mobile communication system and its subsequent evolved versions are used as an example application environment, and the base station and UE equipment supporting NR are used as examples to specifically describe various embodiments according to the present invention.
  • the present invention is not limited to the following embodiments, but can be applied to more other wireless communication systems, such as eLTE, communication systems, or NB-Iot systems, or LTE-M systems. And it can be applied to other base stations and UE devices, such as base stations and UE devices supporting eLTE/NB-Iot/LTE-M.
  • the upper layer of the UE such as a non-access stratum (Non-access stratum, NAS)
  • NAS non-access stratum
  • the access stratum (Access stratum, AS) of the UE such as the RRC layer
  • AS Access stratum
  • RRC layer may also request the UE to restore the RRC connection (request resumption of an RRC connection).
  • a request usually occurs when the RNAU is triggered, or when the UE receives a paging message from the network side in the INACTIVE state.
  • the UE will trigger the RRC connection recovery process. During this process, the UE will send an RRC connection recovery request message to the base station/network side.
  • a UE entering an RRC inactive state can send a transport block (Transport Block) of a predetermined size and carrying data on a preconfigured uplink resource (configured grant, CG).
  • This transmission method can be called CG-based small data transmission.
  • a transport block carrying user data may also be sent in message 3 or message A. Both of these transmission methods can be referred to as Small data transmission (SDT). Since such a transmission is always performed in an inactive state, such a transmission manner can also be referred to as data transmission of the UE in an inactive state.
  • SDT Small data transmission
  • a data radio bearer (DRB) that can be transmitted in a small data transmission mode is called a data radio bearer (DRB for SDT) based on small data transmission.
  • DRB data radio bearer
  • DRB for SDT data radio bearer
  • Such a DRB may also be referred to as a DRB configured with Small Data Transfer (SDT).
  • a data radio bearer that does not allow small data transmission is called a data radio bearer not based on small data transmission (DRB for Non-SDT).
  • DRB data radio bearer not based on small data transmission
  • Such a DRB may also be referred to as a DRB that is not configured for small data transfer (SDT).
  • the UE may decide to use the small data transmission method based on the following reasons:
  • the data arriving at the upper layer can be carried by a data radio bearer based on small data transmission (DRB for SDT), or can be transmitted via a data radio bearer based on small data transmission (DRB for SDT).
  • DRB small data transmission
  • DRB for SDT small data transmission
  • the UE During the RRC connection recovery process, if the UE adopts the transmission mode of small data, the UE needs to recover the DRB first, and generate a corresponding key to encrypt the data packet.
  • SRB0 and SRB1 appearing in the following embodiments all adopt the meanings known in the art, that is, SRB0 is used to transmit RRC messages using the CCCH logical channel, and SRB1 is used to transmit RRC messages using the DCCH logical channel and NAS layer messages .
  • FIG. 1 is a flowchart showing a method executed by a user equipment according to the present invention.
  • step S101 the user equipment initiates an RRC connection recovery process.
  • step S102 the user equipment performs access control and determines whether the access attempt is barred or allowed.
  • step S103 when the user equipment determines that the access attempt is allowed, the user equipment determines whether there is an ongoing RRC connection recovery process for small data transmission.
  • step S104 when the user equipment determines that there is an ongoing RRC connection recovery process for small data transmission, the user equipment performs a fallback operation or generates a fallback instruction for the user equipment to perform a fallback operation.
  • the UE initiates the RRC connection recovery procedure.
  • the UE performs access control (access control).
  • the UE can determine whether the access attempt (access attempt) is barred or allowed according to information such as the access category (Access Category) and the access identifier (Access Category). allowed).
  • the UE When the UE determines that the access attempt is barred, the UE ends or stops the RRC connection recovery procedure.
  • the UE continues to perform operations related to RRC connection recovery, including:
  • the UE determines whether there is an ongoing RRC connection recovery process.
  • this RRC connection recovery process is an RRC connection recovery process for small data transmission (that is, triggered by small data transmission, or using a small data transmission method) RRC connection recovery process). Because the UE will start the timer T319 when initiating the RRC connection recovery process. Then, the operation of the UE judging whether there is an ongoing RRC connection recovery process can be equivalently expressed as the UE judging whether T319 is running.
  • the UE may start a timer different from T319 , assuming it is Timer-1, then preferably, the UE can determine whether Timer-1 is running.
  • the UE may at least perform one or more of the following operations:
  • the bottom layer (mainly refers to the PDCP layer), stop integrity protection and encryption protection
  • the UE does not perform the above fallback operation.
  • Embodiment 1 is divided into Embodiment 1 and Embodiment 2 for further detailed description.
  • the UE performs access control
  • the UE When the UE determines that the access attempt is barred, the UE ends or stops the RRC connection recovery procedure.
  • the UE determines whether there is an ongoing RRC connection recovery procedure (ie, determines whether T319 or Timer-1 is running).
  • the UE can perform the above-mentioned fallback operation.
  • the UE generates a fallback indication.
  • the UE performs the above-mentioned fallback operation.
  • the UE generates a fallback indication at the RRC layer, and when the UE generates the fallback indication in the RRC connection recovery procedure, the UE performs a fallback operation.
  • the UE does not perform the above fallback operation.
  • the operations related to the RRC connection recovery that the UE may perform further include one or more of the following operations:
  • the value of the layer 1 parameter (L1 parameter) provided in the system information block or the value of the default layer 1 parameter of the UE is adopted, wherein the layer 1 parameter here may be the initial system bandwidth part (initial Bandwidth part, BWP), It can also be a timing advance offset;
  • BWP initial Bandwidth part
  • Embodiment 1 when the UE determines that the access attempt is allowed,
  • the UE If the UE has an ongoing RRC connection recovery procedure for small data transmission (that is, T319 or Timer-1 is running), then in addition to performing the fallback operation in Embodiment 1, the UE also performs the following operations:
  • the UE initiates transmission of the RRC Recovery Request message.
  • the UE performs one or more of the following operations:
  • the layer 1 parameter can be the initial system bandwidth part (initial Bandwidth part, BWP) , or timing advance offset;
  • FIG. 2 is a schematic structural block diagram of the user equipment involved in the present invention.
  • the user equipment 200 includes at least a processor 201 and a memory 202 .
  • the processor 201 may include, for example, a microprocessor, a microcontroller, an embedded processor, or the like.
  • the memory 202 may include, for example, volatile memory (eg, random access memory RAM), a hard disk drive (HDD), non-volatile memory (eg, flash memory), or other memory systems, or the like.
  • Program instructions are stored on the memory 202 . When the instruction is executed by the processor 201, one or several steps of the method described in the above-mentioned FIG. 1 of the present disclosure and executed by the user equipment can be executed.
  • the user equipment shown above may include more modules, for example, may also include modules that can be developed or developed in the future and that can be used in a base station, an MME, or a UE, and so on.
  • the various identifiers shown above are only exemplary and not restrictive, and the present disclosure is not limited to the specific information elements exemplified by these identifiers. Numerous changes and modifications may occur to those skilled in the art in light of the teachings of the illustrated embodiments.
  • the various components inside the base station and the user equipment in the above embodiments may be implemented by various devices, including but not limited to: analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, programmable processing Controllers, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), Programmable Logic Devices (CPLDs), etc.
  • DSP digital signal processing
  • ASICs Application Specific Integrated Circuits
  • FPGAs Field Programmable Gate Arrays
  • CPLDs Programmable Logic Devices
  • the program running on the device according to the present invention may be a program that causes the computer to implement the functions of the embodiments of the present invention by controlling a central processing unit (CPU).
  • the program or information processed by the program may be temporarily stored in volatile memory (eg, random access memory RAM), a hard disk drive (HDD), non-volatile memory (eg, flash memory), or other memory systems.
  • a program for realizing the functions of the embodiments of the present invention can be recorded on a computer-readable recording medium.
  • the corresponding functions can be realized by causing a computer system to read programs recorded on the recording medium and execute the programs.
  • a "computer system” as used herein may be a computer system embedded in the device, and may include an operating system or hardware (such as peripherals).
  • the "computer-readable recording medium” may be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a recording medium that dynamically stores a program for a short period of time, or any other recording medium readable by a computer.
  • circuits eg, monolithic or multi-chip integrated circuits.
  • Circuits designed to perform the functions described in this specification may include general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination of the above.
  • DSPs digital signal processors
  • ASICs application specific integrated circuits
  • FPGAs field programmable gate arrays
  • a general-purpose processor may be a microprocessor or any existing processor, controller, microcontroller, or state machine.
  • the above circuit may be a digital circuit or an analog circuit. Where new integrated circuit technologies have emerged as a result of advances in semiconductor technology to replace existing integrated circuits, one or more embodiments of the present invention may also be implemented using these new integrated circuit technologies.
  • the present invention is not limited to the above-described embodiments. Although various examples of the described embodiments have been described, the invention is not limited thereto.
  • Fixed or non-mobile electronic equipment installed indoors or outdoors can be used as terminal equipment or communication equipment, such as AV equipment, kitchen equipment, cleaning equipment, air conditioners, office equipment, vending machines, and other household appliances.

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

Abstract

La présente invention concerne un procédé exécuté par un équipement utilisateur et l'équipement utilisateur. Le procédé exécuté par l'équipement utilisateur comprend les étapes suivantes : l'équipement utilisateur lance un processus de récupération de connexion RRC ; l'équipement utilisateur exécute un contrôle d'accès et détermine si une tentative d'accès est interdite ou autorisée ; lorsque l'équipement utilisateur détermine que la tentative d'accès est autorisée, l'équipement utilisateur détermine s'il existe un processus de récupération de connexion RRC en cours pour une transmission de petites données ; et lorsque l'équipement utilisateur détermine qu'il existe un processus de récupération de connexion RRC en cours pour la transmission de petites données, l'équipement utilisateur exécute une opération de repli ou génère une instruction de repli pour l'équipement utilisateur afin d'exécuter l'opération de repli.
PCT/CN2021/140791 2020-12-25 2021-12-23 Procédé exécuté par un équipement utilisateur et équipement utilisateur WO2022135517A1 (fr)

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CN202011572495.7 2020-12-25
CN202011572495.7A CN114698148A (zh) 2020-12-25 2020-12-25 由用户设备执行的方法以及用户设备

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110312296A (zh) * 2018-03-27 2019-10-08 夏普株式会社 用户设备执行的方法、基站执行的方法、用户设备和基站
US20200092779A1 (en) * 2018-09-18 2020-03-19 Samsung Electronics Co., Ltd. Method and apparatus for reporting selected plmn of rrc-inactive mode ue in next-generation communication system
CN111757471A (zh) * 2019-03-27 2020-10-09 夏普株式会社 用户设备及其执行的预配置上行资源发送方法
CN111800888A (zh) * 2019-08-13 2020-10-20 维沃移动通信有限公司 一种sdt处理方法、设备及系统

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CN110312296A (zh) * 2018-03-27 2019-10-08 夏普株式会社 用户设备执行的方法、基站执行的方法、用户设备和基站
US20200092779A1 (en) * 2018-09-18 2020-03-19 Samsung Electronics Co., Ltd. Method and apparatus for reporting selected plmn of rrc-inactive mode ue in next-generation communication system
CN111757471A (zh) * 2019-03-27 2020-10-09 夏普株式会社 用户设备及其执行的预配置上行资源发送方法
CN111800888A (zh) * 2019-08-13 2020-10-20 维沃移动通信有限公司 一种sdt处理方法、设备及系统

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