WO2023040957A1 - Procédé exécuté par un équipement utilisateur dans un état inactif, et équipement utilisateur - Google Patents

Procédé exécuté par un équipement utilisateur dans un état inactif, et équipement utilisateur Download PDF

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Publication number
WO2023040957A1
WO2023040957A1 PCT/CN2022/119016 CN2022119016W WO2023040957A1 WO 2023040957 A1 WO2023040957 A1 WO 2023040957A1 CN 2022119016 W CN2022119016 W CN 2022119016W WO 2023040957 A1 WO2023040957 A1 WO 2023040957A1
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WIPO (PCT)
Prior art keywords
sdt
configuration information
resource configuration
cell
saved
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PCT/CN2022/119016
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English (en)
Chinese (zh)
Inventor
张崇铭
刘仁茂
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夏普株式会社
张崇铭
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Publication of WO2023040957A1 publication Critical patent/WO2023040957A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the technical field of wireless communication, and more specifically, the present invention relates to a method executed by a user equipment in an inactive state and a corresponding user equipment.
  • the UE entering the RRC INACTIVE STATE can send a transmission block (Transport Block).
  • This transmission method can be called small data transmission (SDT) based on CG.
  • the UE receives configuration information from the base station or the network side in cell A, and configures CG resources (CG-SDT config) for SDT. During the effective period of this resource, the UE may reselect a cell from cell A to cell B. In order to improve the utilization rate of CG resources, in general, when the UE reselects to cell B, it does not Will invalidate CG resources. Therefore, the UE is likely to reselect from cell B back to cell A within the valid period of the resource. When the foregoing situation occurs, once the SDT is triggered, and the CG resource is still within the valid period, the UE can still perform small data transmission in the cell A through the CG.
  • CG-SDT config CG resources
  • the UE may trigger a system information acquisition process to acquire the system information of the cell B.
  • the timing advance (Timing Advance) maintained by the UE side will be adjusted to adapt to the uplink transmission in the cell B.
  • the uplink of the UE may not be synchronized in cell A due to incorrect timing advance, resulting in SDT transmission failure.
  • the object of the present invention is to provide a method and user equipment performed by user equipment in an inactive state that can improve the success rate of uplink transmission when returning to the original cell after cell change .
  • a method performed by the user equipment when it is in an inactive state including: after a predetermined period of time elapses after it is determined that an uplink message transmission process needs to be triggered and the uplink message transmission process is performed During the period until now: determine whether there is saved pre-configured uplink authorization resource configuration information for small data transmission, that is, CG-SDT resource configuration information; determine whether the user equipment has performed a cell change; if there is a saved CG-SDT resource configuration information, and a cell change is performed, the operation of invalidating the saved CG-SDT resource configuration information is performed.
  • the operation of invalidating the saved CG-SDT resource configuration information includes any of the following: releasing the saved CG-SDT resource configuration information; discarding the saved CG-SDT resource configuration information; stopping Pre-configured uplink grant timer for saved CG-SDT resource configuration information.
  • determining whether the user equipment has performed a cell change includes: when there is saved CG-SDT resource configuration information determining whether the cell change is performed by determining whether the current cell where the user equipment is located is the same as the receiving cell of the saved CG-SDT resource configuration information.
  • the method further includes: when the uplink message transmitted by the uplink message transmission process is generated, determining that the uplink message transmission process needs to be triggered.
  • the uplink message transmitted by the uplink message transmission process is generated, it is determined whether there is saved CG-SDT resource configuration information, and whether a cell change is performed.
  • the uplink message includes an RRC system information request message.
  • the method further includes: if there is currently saved CG-SDT resource configuration information, judging whether the CG-SDT resource configuration information is within the validity period, and determining whether the user equipment has performed a cell change includes : When the CG-SDT resource configuration information is within the validity period, determine whether the cell change is performed by determining whether the current cell where the user equipment is located is the same as the receiving cell that received the CG-SDT resource configuration information.
  • the operation of judging whether the CG-SDT resource configuration information is within the validity period is performed by checking whether the pre-configured uplink grant timer for the CG-SDT resource configuration information is in the running state.
  • a method performed by the user equipment in an inactive state including: if receiving a timing advance adjustment indication for a timing advance for uplink synchronization, then according to the Before adjusting the value of the timing advance according to the timing advance adjustment instruction, store the value of the currently maintained timing advance as a temporary value; and after performing the uplink transmission process corresponding to the advance adjustment instruction, if it is determined to perform If the cell in the uplink transmission process is different from the cell corresponding to the temporary value, the temporary value is assigned to the timing advance.
  • the method further includes: after receiving the timing advance adjustment instruction and before storing the currently maintained timing advance value as a temporary value, determining whether the cell performing the uplink transmission process is the same as the current The cells corresponding to the values of the maintained timing advance are the same.
  • Storing the currently saved value of the timing advance as a temporary value may include: if the cell performing the uplink transmission process is different from the cell corresponding to the currently saved value of the timing advance, then storing the currently saved value of the timing advance stored as a temporary value.
  • the method further includes: after performing the uplink transmission process corresponding to the timing advance adjustment indication, determining whether the cell performing the uplink transmission process is the same as the cell corresponding to the temporary value.
  • the method further includes: after assigning the temporary value to the timing advance, or after performing the uplink transmission process and performing the uplink transmission process, the cell corresponding to the temporary value When the cells are the same, delete the temporary value.
  • a user equipment including: a processor; and a memory storing instructions, wherein the instructions execute the above method when executed by the processor.
  • the present invention it is possible to improve the uplink transmission success rate when the user equipment returns to the original cell after changing the cell.
  • FIG. 1 is a flow chart for explaining the random access procedure involved in the present invention.
  • FIG. 2 is a diagram for explaining the timing advance amount according to the present invention.
  • Fig. 3 is a flowchart of a method executed by a user equipment in an inactive state according to an embodiment of the present invention.
  • Fig. 4 is a flowchart of a method performed by a user equipment in an inactive state according to another embodiment of the present invention
  • Fig. 5 is used to illustrate the structural block diagram of the user equipment involved in the present invention.
  • the NR mobile communication system and its subsequent evolution versions are taken as an example application environment, and a base station and UE equipment supporting NR are taken as examples to describe multiple embodiments of the present invention in detail.
  • the present invention is not limited to the following embodiments, but is applicable 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 equipment, such as base stations and UE equipment supporting eLTE/NB-Iot/LTE-M.
  • the UE may be configured with an uplink grant, and its corresponding uplink resources generally appear periodically.
  • the UE may directly use such a CG without receiving dynamic scheduling information.
  • the type of CG used for SDT is generally type 1, that is, the UE can use it directly after receiving the configuration information of the CG without waiting for the activation or scheduling instructions of the network layer.
  • the configuration information of the CG used for SDT is generally carried in the RRC Release message. Such configuration information can be marked as CG-SDT config. Such configuration information can carry the time and frequency resource information available to the UE, the RSRP value used for CG-SDT resource validity judgment, and the timing advance timer (CG-SDT TA timer) associated with CG-SDT ) duration setting.
  • CG-SDT TA timer timing advance timer
  • the UE When the UE receives the RRC release message containing the CG-SDT config, the UE can start the CG-SDT TA timer (hereinafter sometimes referred to as CG-SDT TAT), and enter the RRC inactive state.
  • CG-SDT TAT CG-SDT TA timer
  • the configured CG-SDT resources of the UE are considered valid and can be used.
  • the random access process involved in this specification includes a four-step random access process and a two-step random access process.
  • the following describes the four-step random access process with reference to FIG. 1 .
  • Fig. 1 is a flow chart for explaining the four-step random access process involved in the present invention.
  • the 4-step random access procedure performed by the UE includes the following steps:
  • Step S100 UE selects random access resources for random access. in this process:
  • the UE selects the preamble sequence (preamble) for sending, and sets the sequence number corresponding to the selected preamble as the value of the parameter PREAMBLE_INDEX;
  • PRACH occasions multiple PRACH occasions
  • Step S101 UE sends the selected preamble on the determined PRACH occasion.
  • Step S102 the UE receives a Random Access Response (Random Access Response, RAR) from the base station side.
  • RAR Random Access Response
  • the UE can determine that the RAR is sent to itself.
  • UL grant will be carried in such RAR.
  • the UL grant indicates the PUSCH resources used to transmit message three.
  • Timing Advance Command time advance adjustment instruction
  • RAR Timing Advance adjustment instruction
  • This indication contains a value, which is used for indexing or corresponds to a valid uplink synchronization timing advance TA.
  • the UE receives such a Timing Advance Command, it will apply the timing advance indicated in it for the next uplink transmission.
  • Step S103 UE sends message 3 on the PUSCH resource indicated by the UL grant.
  • the UE will carry identification information for contention conflict resolution.
  • Step S104 the UE receives message 4 sent from the base station side.
  • the UE If the message 4 carries the identification information of the UE carried in the message 3, then the UE considers that the contention conflict is resolved and the random access process is successfully completed.
  • the above four-step random access procedure can also be referred to as the first type of layer 1 random access (Type-1 layer 1 Random Access Procedure, type 1 L1 RA).
  • the type 1 L1 RA process includes at least the transmission of the random access preamble (or transmission of message 1) on the PRACH, and the random access response Transmission/reception of the message (Random Access Response Message), the transmission of this random access response message is scheduled by the PDCCH and transmitted on the PDSCH; in addition, the random access response can also be included in the type 1 L1 RA process
  • the UE can initiate on-demand system information acquisition for the system information that is not broadcast by the current serving cell but supported by the cell.
  • the UE may send a preamble to the network side/base station during the aforementioned random access process, and the preamble corresponds to the system information that the UE wishes to obtain.
  • the UE receives the response information for the preamble, such as the RAR containing the preamble index, it may consider that the random access is successful, and then receive the system information on the corresponding cell broadcast channel.
  • Such a system information request manner may be referred to as a system information request based on message one.
  • the UE may also send an RRCSystemInfoRequest message to the network side/base station, in which the identifier of the system information that the UE wishes to acquire is indicated.
  • a request message may be sent to the network side/base station in message three in the aforementioned random access procedure. Then, when the UE considers that the contention conflict is resolved based on message 4 and the random access process is successfully completed, the UE can receive the requested system information on the corresponding cell broadcast channel.
  • Such a system information request manner may be referred to as a system information request based on message three.
  • the timing advance N TA can be used to calculate the timing advance between uplink and downlink (Timing advance between downlink and uplink).
  • the UE in order to maintain uplink synchronization, the UE needs to start the i-th uplink frame (Uplink Frame i) transmission a period of time before the starting position of the i-th downlink frame (Downlink Frame i), as shown in the figure below.
  • the Timing advance command contains an index value (index value), and this index value is recorded as TA, and is used for calculating N TA .
  • index value index value
  • the UE can calculate the value of N TA according to TA in it. In other words, T A indirectly indicates the value of N TA .
  • the camped cell may be referred to as a serving cell of the UE.
  • a cell that provides wireless connection services for it may be called a serving cell of the UE.
  • the serving cell may be referred to as a cell for short.
  • Different cells have different corresponding cell identities (cell identities, cell IDs). Therefore, it is judged whether they are the same cell by judging whether the cell identities are the same.
  • Fig. 3 is a flowchart of a method executed by a user equipment in an inactive state according to an embodiment of the present invention.
  • the method shown in FIG. 3 may be executed at any time during the period from when it is determined that the uplink message transmission process needs to be triggered to when the uplink message transmission process is executed and a predetermined time period elapses. For example, these operations may be performed before triggering the uplink transmission process. In an example, it may be determined that the uplink message transmission process needs to be triggered when the uplink message transmitted by the uplink message transmission process is generated. These operations may also be performed when the uplink message is generated.
  • the uplink message may include, for example, an RRC system information request message.
  • the predetermined period of time can be appropriately set according to practice, for example, it can be set to zero, and in this case, the method is executed after the uplink transmission process is performed at the latest.
  • an operation of invalidating the saved CG-SDT resource configuration information is performed.
  • the operation to invalidate the saved CG-SDT resource configuration information includes any of the following: release the saved CG-SDT resource configuration information; discard the saved CG-SDT resource configuration information; stop targeting the saved CG-SDT resource configuration information; Pre-configured uplink grant timer for SDT resource configuration information.
  • FIG. 3 shows that the operation of determining whether there is saved CG-SDT resource configuration information and the operation of determining whether a cell change has been performed are performed in parallel, the execution order of these two operations is not particularly limited.
  • the uplink transmission process described in this embodiment may be, for example, the above four-step random access process.
  • Step 1 The UE receives an RRC Release message (RRC Release message), in which CG-SDT-Config (CG-SDT resource configuration information) is carried, that is, the UE is configured with CG resources for SDT. It is assumed here that the serving cell where the UE receives the message is marked as cell A, so cell A can be called the cell where the UE receives the RRCRelease message, or the cell where the UE is provided with CG-SDT-Config.
  • RRC Release message RRC Release message
  • CG-SDT-Config CG-SDT resource configuration information
  • Step 2 UE requests to acquire system information.
  • the information requested by the UE in this step is based on on demand system information.
  • -UE adopts common channel configuration (CCCH configuration)
  • -UE uses the default MAC Cell Group configuration (default MAC Cell Group configuration)
  • the UE continues to judge whether the current serving cell (denoted as cell B here) is the same as the cell from which the UE obtains CG-SDT-Config:
  • the UE can instruct the lower layer to stop CG-SDT-TAT or instruct the lower layer to release CG-SDT-TAT; further, the UE You can also release (release) CG-SDT-Config; and optionally, discard the previously saved CG-SDT-Config (discard previously stored CG-SDT-Config)
  • the UE can determine whether to save (store) the CG-SDT-Config and perform a series of related operations. It may also be that the UE can judge whether to save (store) the CG-SDT-Config and Carry out a series of related operations, including the above-mentioned 1), 1.1), 1.2), and 2).
  • cell B is the current serving cell of the UE, that is, the cell where the UE camps when it initiates a request to obtain system information.
  • the UE requests to acquire system information in cell B.
  • Fig. 4 is a flowchart of a method executed by a user equipment in an inactive state according to an embodiment of the present invention.
  • the value of the currently maintained timing advance is stored as a temporary value.
  • the cell for which the UE obtains the currently maintained timing advance may be regarded as the cell corresponding to the value, and when the value is stored as a temporary value, the cell is recorded as the cell corresponding to the temporary value.
  • the judgment operation of S408 may also be performed after receiving the timing advance adjustment instruction when executed. For example, when the timing advance adjustment instruction is received, it may be determined whether the cell performing the uplink transmission process is the same as the cell corresponding to the currently maintained timing advance value. If the cell performing the uplink transmission process is different from the cell corresponding to the currently stored timing advance value, the currently stored timing advance value is stored as a temporary value. Then, after the uplink transmission process is performed, it is no longer necessary to judge whether the cell performing the uplink transmission is the same as the cell corresponding to the temporary value, and assign the temporary value to the timing advance. Of course, this determination may be performed again.
  • the uplink transmission process described in this embodiment may be, for example, the above four-step random access process.
  • the timing advance when returning to the cell corresponding to the saved CG-SDT configuration information can be matched with the cell , so as to ensure the success rate of uplink transmission.
  • the UE performs a random access procedure.
  • RAR random access response
  • Timing Advance Command timing advance adjustment indication
  • the UE may save the currently stored (stored) or maintained (maintained) N TA value as a temporary N TA (store N TA as temporary N TA ). That is, assign a value to a variable (variable) temporary N TA (temporary N TA ), and the assigned value is equal to the value of the variable N TA .
  • the types of the N TA and the temporary N TA may also be parameters. It should be noted that, in the scenario discussed in the present invention, the N TA value currently maintained by the UE is obtained in cell A. It can be considered that this N TA value corresponds to cell A. When the UE saves the N TA value as a temporary N TA , this cell A is recorded as the cell corresponding to the temporary N TA .
  • the UE applies (apply) the received Timing Advance Command, and uses the index value (index value) T A indicated therein to adjust the time, mainly for controlling the amount (amount) or degree of the time adjustment (Timing adjustment), Or calculate/indicate the timing advance N TA . It can be seen that after applying the received TA , the value of the variable N TA is updated or recalculated.
  • the UE When the UE considers that the random access is successfully completed, if the random access is performed in cell A, then the UE starts or restarts CG-SDT-TAT, and optionally, indicates to the upper layer that the Timing Advance value has been adjusted. Specifically, the MAC layer or the MAC entity of the UE may indicate to the RRC layer.
  • the UE When the UE considers that the random access is successfully completed, if the random access is performed in cell B, and cell B and cell A are different, then the UE sets the value of N TA to the temporary N TA saved by the UE (set the N TA TA to the stored temporary N TA ). That is, the value of the temporary N TA is assigned to N TA .
  • the saved temporary N TA may be deleted after assignment.
  • the temporary value may also be deleted when the uplink transmission process (for example, the random access process in this embodiment) is performed and the cell performing the uplink transmission process is the same as the cell corresponding to the temporary value.
  • the cell corresponding to the temporary value refers to cell A.
  • the user equipment UE500 includes a processor 501 and a memory 502 .
  • the processor 501 may include, for example, a microprocessor, a microcontroller, an embedded processor, and the like.
  • the memory 502 may include, for example, a volatile memory (such as a random access memory RAM), a hard disk drive (HDD), a nonvolatile memory (such as a flash memory), or other memories.
  • Memory 502 has program instructions stored thereon. When the instruction is executed by the processor 501, the above-mentioned method performed by the user equipment described in detail in the present invention can be executed.
  • the program running on the device according to the present invention may be a program that causes a computer to realize 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 (such as random access memory RAM), hard disk drive (HDD), non-volatile memory (such as flash memory), or other memory systems.
  • a program for realizing the functions of the various 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.
  • the so-called “computer system” here may be a computer system embedded in the device, which may include an operating system or hardware (such as peripheral devices).
  • the "computer-readable recording medium” may be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a recording medium in which a short-term dynamic storage program is stored, or any other recording medium readable by a computer.
  • circuits for example, single-chip 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 can be a microprocessor, or it can be any existing processor, controller, microcontroller, or state machine.
  • the above-mentioned circuits may be digital circuits or analog circuits. Where advances in semiconductor technology have resulted in new integrated circuit technologies that replace existing integrated circuits, one or more embodiments of the 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 embodiments have been described, the present 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 vise à fournir un procédé exécuté par un équipement utilisateur dans un état inactif. Le procédé consiste : dans une période allant de la détermination qu'un processus de transmission de message de liaison montante doit être déclenché à la fin d'une période de temps prédéterminée qui s'est écoulée après que le processus de transmission de message de liaison montante a été exécuté, à déterminer si des informations de configuration de ressource d'octroi configuré stockées, c'est-à-dire des informations de configuration de ressource CG-SDT, pour une transmission de petites données, sont présentes ; à déterminer si un équipement utilisateur a effectué un changement de cellule ; et, si les informations de configuration de ressource CG-SDT stockées sont présentes et que le changement de cellule a été effectué, à exécuter une opération pour invalider les informations de configuration de ressource CG-SDT stockées.
PCT/CN2022/119016 2021-09-16 2022-09-15 Procédé exécuté par un équipement utilisateur dans un état inactif, et équipement utilisateur WO2023040957A1 (fr)

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CN202111087550.8 2021-09-16
CN202111087550.8A CN115835235A (zh) 2021-09-16 2021-09-16 由用户设备在处于非激活态时执行的方法以及用户设备

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Citations (4)

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WO2019217829A1 (fr) * 2018-05-10 2019-11-14 Convida Wireless, Llc Transmission de petites données avec accès multiple non orthogonal
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WO2019217829A1 (fr) * 2018-05-10 2019-11-14 Convida Wireless, Llc Transmission de petites données avec accès multiple non orthogonal
WO2020193846A1 (fr) * 2019-03-22 2020-10-01 Nokia Technologies Oy Ressource de liaison montante préconfigurée pendant une radiomessagerie et un accès initial
WO2021000289A1 (fr) * 2019-07-03 2021-01-07 Oppo广东移动通信有限公司 Procédé et appareil pour transmettre de petites données
CN113242612A (zh) * 2020-01-22 2021-08-10 华硕电脑股份有限公司 无线通信系统中用于非活动状态下的传送的方法和设备

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QUALCOMM INCORPORATED: "Discussion on CG based NR small data transmission", 3GPP DRAFT; R2-2010007, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Online; 20201102 - 20201113, 23 October 2020 (2020-10-23), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051942750 *
SAMSUNG: "Configured Grant based Small Data Transmission", 3GPP DRAFT; R2-2009094, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Electronic; 20201102 - 20201113, 23 October 2020 (2020-10-23), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051942125 *

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