EP-4742799-A1 - DATA TRANSMISSION METHOD AND APPARATUS, AND DEVICE AND SYSTEM

EP4742799A1EP 4742799 A1EP4742799 A1EP 4742799A1EP-4742799-A1

Abstract

This application provides a data transmission method and apparatus, a device, and a system. In the data transmission method, a terminal device may repeatedly send a first data unit at an available transmission occasion TO within a configured grant CG periodicity, where the first data unit is a last data unit or multiple data units in a plurality of data units continuously sent within the CG periodicity, and the CG periodicity includes a plurality of available TOs consecutive in time domain. In the foregoing method, the terminal device repeatedly sends only the last data unit or the multiple data units within the CG periodicity, to achieve an objective of both reliability of data transmission and not affecting a system capacity. In addition, because the terminal device repeatedly sends the last data unit or the several data units, a network device may not schedule a hybrid automatic repeat request HARQ for the last data unit or the multiple data units, to reduce system signaling interaction.

Inventors

ZHANG, JIAN

Assignees

Honor Device Co., Ltd.

Dates

Publication Date: 20260513
Application Date: 20240313

Claims (20)

A data transmission method, applied to a terminal device, wherein the method comprises: repeatedly sending a first data unit at an available transmission occasion TO within a configured grant CG periodicity, wherein the first data unit is a last data unit or multiple data units in a plurality of data units continuously sent within the CG periodicity, the CG periodicity comprises N available TOs consecutive in time domain, and N is a positive integer greater than 1.
The method according to claim 1, wherein the data unit is a physical uplink shared channel PUSCH.
The method according to claim 1 or 2, wherein the method further comprises: receiving configuration information from a network device, wherein the configuration information is used to configure related information of a data unit repeatedly sent by the terminal device within the CG periodicity.
The method according to claim 3, wherein the configuration information is first configuration information; the first configuration information comprises index information of the data unit repeatedly sent within the CG periodicity, and a quantity of sending times of the data unit repeatedly sent; and the index information is used to indicate the last data unit or the multiple data units.
The method according to any one of claims 1 to 4, wherein the repeatedly sending a first data unit at an available transmission occasion TO within a configured grant CG periodicity comprises: repeatedly sending the first data unit at the available TO within the CG periodicity based on the first configuration information, wherein the first data unit is the last data unit or the multiple data units configured in the first configuration information.
The method according to claim 3, wherein the configuration information is second configuration information; the second configuration information comprises first indication information and a quantity of sending times of the data unit repeatedly sent; and the first indication information is used to indicate that the terminal device is allowed to repeatedly send the data unit within the CG periodicity.
The method according to any one of claims 1 to 3 and claim 6, wherein the repeatedly sending a first data unit at an available transmission occasion TO within a configured grant CG periodicity comprises: determining the first data unit based on the quantity of sending times of the data unit repeatedly sent in the second configuration information, to-be-sent data volume within the CG periodicity, and the available TO within the CG periodicity; and repeatedly sending the first data unit at the available TO within the CG periodicity.
The method according to any one of claims 3 to 7, the configuration information is carried in radio resource control RRC.
The method according to any one of claims 1 to 8, wherein the method further comprises: sending second indication information to the network device, wherein the second indication information is used to indicate whether there is repeated sending of a data unit within a reporting periodicity.
The method according to claim 9, wherein the sending second indication information to the network device comprises: sending the second indication information to the network device at one available TO or a plurality of available TOs within the reporting periodicity.
The method according to claim 10, wherein the sending the second indication information to the network device at a plurality of available TOs within the reporting periodicity comprises: sending the second indication information to the network device at each of the plurality of available TOs within the reporting periodicity.
The method according to any one of claims 9 to 11, the second indication information is carried in uplink control information UCI.
The method according to any one of claims 9 to 12, wherein the second indication information comprises P bits, P is a positive integer greater than 1, and the P bits are used to indicate use statuses of P available TOs within the reporting periodicity; and if a last bit or multiple bits in the P bits are a first value, the second indication information is used to indicate that there is repeated sending of a data unit within the reporting periodicity.
The method according to any one of claims 9 to 12, wherein the sending second indication information to the network device comprises: sending the second indication information to the network device at a first available TO, wherein the first available TO is an i th available TO within the reporting periodicity, and i is a positive integer greater than 1, wherein the second indication information comprises P bits, an i th bit in the P bits is used to indicate a use status of the first available TO, and at least one of first (i-1) bits is used to indicate whether there is repeated sending of a data unit within the reporting periodicity.
The method according to claim 14, wherein an (i-1) th bit in the P bits in the second indication information is used to indicate whether there is repeated sending of a data unit at the first available TO; and if a value of the (i-1) th bit is flipped, the second indication information is used to indicate that there is repeated sending of a data unit at the first available TO.
The method according to claim 14, wherein the first (i-1) bits in the P bits in the second indication information are used to indicate whether there is repeated sending of a data unit at last x available TOs within the reporting periodicity, and x is a positive integer less than or equal to (i-1); and if values of x bits in the first (i-1) bits are flipped, the second indication information is used to indicate that there is repeated sending of a data unit at the last x available TOs within the reporting periodicity.
The method according to any one of claims 9 to 12, wherein the second indication information comprises (Y+m) bits, Y is a positive integer, and first Y bits in the (Y+m) bits are used to indicate use statuses of Y available TOs within the reporting periodicity; and last m bits in the (Y+m) bits are used to indicate whether there is repeated sending of a data unit within the reporting periodicity, m is determined based on a quantity of data units repeatedly sent within the CG periodicity configured in the first configuration information, and m is a positive integer; and if the last m bits in the (Y+m) bits are a first value, the second indication information is used to indicate that there is repeated sending of a data unit at last m available TOs within the reporting periodicity.
The method according to any one of claims 9 to 17, wherein the reporting periodicity is one or more CG periodicities; and if the reporting periodicity is one CG periodicity, P is equal to N; or if the reporting periodicity is a CG periodicities, P is equal to a*N, and a is a positive integer greater than 1.
The method according to any one of claims 1 to 18, wherein the available TO comprises a slot and/or a symbol used for uplink data transmission.
A data transmission method, applied to a network device, wherein the method comprises: repeatedly receiving a first data unit at an available transmission occasion TO within a configured grant CG periodicity, wherein the first data unit is a last data unit or multiple data units in a plurality of data units continuously sent by a terminal device within the CG periodicity, the CG periodicity comprises N available TOs consecutive in time domain, and N is a positive integer greater than 1.

Description

This application claims priority to Chinese Patent Application No. 202311011326.X, filed with the China National Intellectual Property Administration on August 10, 2023 and entitled "DATA TRANSMISSION METHOD AND APPARATUS, DEVICE, AND SYSTEM", which is incorporated herein by reference in its entirety. TECHNICAL FIELD This application relates to the field of communication technologies, and in particular, to a data transmission method and apparatus, a device, and a system. BACKGROUND In a wireless communication system, an extended reality (extended reality, XR) technology has features such as multi-view angles and strong interactivity, can provide brand new experience for a user, and has great application value and commercial potential. XR includes technologies such as augmented reality (augmented reality, AR), virtual reality (virtual reality, VR), and mixed reality (mixed reality, MR). XR data is usually transmitted in a form of an image frame. XR data usually has a specific frame rate and periodicity. Therefore, a configured grant (configured grant, CG) is applicable to transmission of such periodic XR data. A terminal may send XR data on a plurality of available TOs within one CG periodicity based on a CG periodicity configured by a network and a plurality of available transmission occasions (transmission occasions, TOs) within the CG periodicity. How the terminal repeatedly sends the XR data on the plurality of available TOs within one CG periodicity is a problem TO be urgently discussed at present. SUMMARY Embodiments of this application provide a data transmission method and apparatus, a device, and a system, to improve reliability and transmission efficiency of data transmission. According to a first aspect, an embodiment of this application provides a data transmission method. The method may be applied to a terminal device, and includes: repeatedly sending a first data unit at an available transmission occasion TO within a configured grant CG periodicity, where the first data unit is a last data unit or multiple data units in a plurality of data units continuously sent within the CG periodicity, the CG periodicity includes N available TOs consecutive in time domain, and N is a positive integer greater than 1. In this embodiment, the terminal device repeatedly sends only the last data unit or the multiple data units within the CG periodicity, to achieve an objective of both reliability of data transmission and not affecting a system capacity. In addition, because the terminal device repeatedly sends the last data unit or the several data units, a network device may not schedule a hybrid automatic repeat request HARQ for the last data unit or the multiple data units, and only schedules an HARQ for first several data units within the CG periodicity, to reduce system signaling interaction and improve data transmission efficiency. In an optional embodiment of the first aspect, the data unit is a physical uplink shared channel PUSCH. In this embodiment, that the data unit is a PUSCH may also be described as: the data unit is sent on the PUSCH, or the data unit is carried on the PUSCH. That the terminal device repeatedly sends the last data unit or the several data units may be described as: the terminal device repeatedly sends a last PUSCH or several PUSCHs. In an optional embodiment of the first aspect, the data transmission method further includes: receiving configuration information from the network device, where the configuration information is used to configure related information of a data unit repeatedly sent by the terminal device within the CG periodicity. In this embodiment, the configuration information delivered by the network device to the terminal device may be used to indicate the terminal device to repeatedly send uplink data within the CG periodicity. In this way, the terminal device may repeatedly send the uplink data at one available TO or a plurality of available TOs within the CG periodicity based on the configuration information, to improve reliability of data transmission. In an optional embodiment of the first aspect, the configuration information is first configuration information; the first configuration information includes index information of the data unit repeatedly sent within the CG periodicity, and a quantity of sending times of the data unit repeatedly sent; and the index information is used to indicate the last data unit or the multiple data units. In an optional embodiment of the first aspect, the repeatedly sending a first data unit at an available transmission occasion TO within a configured grant CG periodicity includes: repeatedly sending the first data unit at the available TO within the CG periodicity based on the first configuration information, where the first data unit is the last data unit or the multiple data units configured in the first configuration information. In this embodiment, the network device delivers the first configuration information to the termi