WO-2025103312-A9 - COMMUNICATION METHOD AND APPARATUS

WO2025103312A9WO 2025103312 A9WO2025103312 A9WO 2025103312A9WO-2025103312-A9

Abstract

A communication method and apparatus, relating to the technical field of wireless communications. The method comprises: a network device sending first configuration information, the first configuration information indicating a first downlink carrier, a first uplink carrier, and a second uplink carrier, the first downlink carrier being used for downlink data transmission, the first uplink carrier and the second uplink carrier being used for uplink data transmission, and the first downlink carrier and the first uplink carrier respectively performing downlink data transmission and uplink data transmission according to a TDD mode, wherein the first downlink carrier, the first uplink carrier and the second uplink carrier are located within a first frequency band; and on the basis of the first configuration information, using at least one of the first downlink carrier, the first uplink carrier, and the second uplink carrier to perform data transmission with a terminal device.

Inventors

HOU, Hailong
GUO, ZHIHENG
LU, Shaozhong
SONG, Xinghua
LI, XIANGHUA
ZHANG, GUANXI
CHEN, DAGENG

Assignees

华为技术有限公司

Dates

Publication Date: 20260507
Application Date: 20241112
Priority Date: 20231117

Claims (20)

A communication method, characterized in that it includes: Send first configuration information, which indicates a first downlink carrier, a first uplink carrier, and a second uplink carrier. The first downlink carrier is used for downlink data transmission, and the first uplink carrier and the second uplink carrier are used for uplink data transmission. The first downlink carrier and the first uplink carrier perform downlink data transmission and uplink data transmission respectively in time division duplex (TDD) mode. The first downlink carrier, the first uplink carrier, and the second uplink carrier are located in a first frequency band. Based on the first configuration information, at least one of the first downlink carrier, the first uplink carrier, and the second uplink carrier is used to transmit data with the terminal device.
The method as described in claim 1, wherein the first frequency band includes a first frequency domain resource and a second frequency domain resource, the first frequency domain resource is used for uplink and downlink transmission in TDD mode, the second frequency domain resource is used only for uplink transmission, the first downlink carrier and the first uplink carrier are located within the first frequency domain resource, and the second uplink carrier is located within the second frequency domain resource.
The method as described in claim 2, wherein the first frequency domain resource and the second frequency domain resource are discontinuous.
The method as described in any one of claims 1-3, characterized in that a first guard band exists between the first downlink carrier and the second uplink carrier, and the first guard band is not used for data transmission; or, There is a first guard band between the first downlink carrier and the second uplink carrier, and there is a second guard band between the first uplink carrier and the second uplink carrier. The first guard band and the second guard band are not used for data transmission.
The method according to any one of claims 1-4, characterized in that, the step of transmitting data with the terminal device using at least one of the first downlink carrier, the first uplink carrier, and the second uplink carrier according to the first configuration information includes: Within the first time unit, data is transmitted to the terminal device on the first downlink carrier; or, Within the first time unit, data transmitted by the terminal device is received on the second uplink carrier; or Within the first time unit, data is transmitted to the terminal device on the first downlink carrier, and data transmitted by the terminal device is received on the second uplink carrier.
The method according to any one of claims 1-4, characterized in that, the step of transmitting data with the terminal device using at least one of the first downlink carrier, the first uplink carrier, and the second uplink carrier according to the first configuration information includes: Within the second time unit, data transmitted by the terminal device is received on the first uplink carrier; or, Within the second time unit, data transmitted by the terminal device is received on the second uplink carrier; or... Within the second time unit, data transmitted by the terminal device is received simultaneously on both the first uplink carrier and the second uplink carrier.
The method according to any one of claims 5-6, characterized in that the method further comprises: Send TDD uplink/downlink configuration information, which indicates the time unit format of multiple time units within a certain period of time. The time unit format includes a first time unit format and a second time unit format. The first time unit format supports both downlink data transmission and uplink data transmission, while the second time unit format only supports uplink data transmission. The format of the first time unit is the first time unit format, and the format of the second time unit is the second time unit format.
The method according to any one of claims 1-7, characterized in that the method further comprises: Sending instruction information, the instruction information instructing the terminal device to send data on the first uplink carrier, or on the second uplink carrier, or simultaneously on the first uplink carrier and the second uplink carrier within a second time unit.
The method according to any one of claims 1-8, characterized in that the method further comprises: The system receives capability information from the terminal device, the capability information including first terminal capability information and/or second terminal capability information; wherein, the first terminal capability information indicates that the terminal device supports simultaneously receiving data on the first downlink carrier and transmitting data on the second uplink carrier, or indicates that the terminal device does not support simultaneously receiving data on the first downlink carrier and transmitting data on the second uplink carrier; the second terminal capability information indicates that the terminal device supports simultaneously transmitting data on the first uplink carrier and the second uplink carrier, or indicates that the terminal device does not support simultaneously transmitting data on the first uplink carrier and the second uplink carrier. The step of transmitting data with the terminal device using at least one of the first downlink carrier, the first uplink carrier, and the second uplink carrier according to the first configuration information includes: Based on the first configuration information and the capability information of the terminal device, at least one of the first downlink carrier, the first uplink carrier, and the second uplink carrier is used to transmit data with the terminal device.
The method according to any one of claims 1-9 is characterized in that the first configuration information is transmitted through one or more of the following signaling: system message, radio resource control (RRC) message, media access control (MAC) control unit (CE), and downlink control information (DCI).
A communication method, characterized in that it includes: The system receives first configuration information, which indicates a first downlink carrier, a first uplink carrier, and a second uplink carrier. The first downlink carrier is used for downlink data transmission, and the first uplink carrier and the second uplink carrier are used for uplink data transmission. The first downlink carrier and the first uplink carrier perform downlink data transmission and uplink data transmission respectively in a time-division duplex (TDD) manner. The first downlink carrier, the first uplink carrier, and the second uplink carrier are located in a first frequency band. Based on the first configuration information, at least one of the first downlink carrier, the first uplink carrier, and the second uplink carrier is used to transmit data with the network device.
The method as described in claim 11, wherein the first frequency band includes a first frequency domain resource and a second frequency domain resource, the first frequency domain resource is used for uplink and downlink transmission in time division duplex (TDD) mode, the second frequency domain resource is used only for uplink transmission, the first downlink carrier and the first uplink carrier are located within the first frequency domain resource, and the second uplink carrier is located within the second frequency domain resource.
The method as described in claim 12, wherein the first frequency domain resource and the second frequency domain resource are discontinuous.
The method as described in any one of claims 11-13, characterized in that a first guard band exists between the first downlink carrier and the second uplink carrier, and the first guard band is not used for data transmission; or, There is a first guard band between the first downlink carrier and the second uplink carrier, and there is a second guard band between the first uplink carrier and the second uplink carrier. The first guard band and the second guard band are not used for data transmission.
The method as described in any one of claims 11-14, characterized in that, the step of transmitting data with the network device using at least one of the first downlink carrier, the first uplink carrier, and the second uplink carrier according to the first configuration information includes: Within the first time unit, data transmitted by the network device is received on the first downlink carrier; or... Within the first time unit, data is transmitted to the network device on the second uplink carrier; or Within the first time unit, data sent by the network device is received on the first downlink carrier, and data is simultaneously sent to the network device on the second uplink carrier.
The method as described in any one of claims 11-15, characterized in that, the step of transmitting data with the network device using at least one of the first downlink carrier, the first uplink carrier, and the second uplink carrier according to the first configuration information includes: Within the second time unit, data is transmitted to the network device on the first uplink carrier; or... Within the second time unit, data is transmitted to the network device on the second uplink carrier; or... Within the second time unit, data is simultaneously transmitted to the network device on both the first uplink carrier and the second uplink carrier.
The method according to any one of claims 15-16, characterized in that the method further comprises: Receive TDD uplink/downlink configuration information, wherein the TDD uplink/downlink configuration information indicates the time unit format of multiple time units within a certain period of time, wherein the time unit format includes a first time unit format and a second time unit format, wherein the first time unit format supports both downlink data transmission and uplink data transmission, and the second time unit format only supports uplink data transmission; The format of the first time unit is the first time unit format, and the format of the second time unit is the second time unit format.
The method according to any one of claims 11-17, characterized in that the method further comprises: The terminal device receives an instruction from the network device, the instruction instructing the terminal device to transmit data on the first uplink carrier, or on the second uplink carrier, or simultaneously on both the first and second uplink carriers within a second time unit.
The method according to any one of claims 11-18, characterized in that the method further comprises: The network device sends capability information of the terminal device, the capability information including first terminal capability information and/or second terminal capability information; wherein, the first terminal capability information indicates that the terminal device supports simultaneously receiving data on the first downlink carrier and transmitting data on the second uplink carrier, or indicates that the terminal device does not support simultaneously receiving data on the first downlink carrier and transmitting data on the second uplink carrier; the second terminal capability information indicates that the terminal device supports simultaneously transmitting data on the first uplink carrier and the second uplink carrier, or indicates that the terminal device does not support simultaneously transmitting data on the first uplink carrier and the second uplink carrier.
The method as described in any one of claims 11-19 is characterized in that the first configuration information is received through one or more of the following signaling: system message, radio resource control (RRC) message, media access control (MAC) control unit (CE) message, and downlink control information (DCI) message.

Description

A communication method and apparatus Cross-reference of related applications This application claims priority to Chinese Patent Application No. 202311545882.5, filed on November 17, 2023, entitled "A Communication Method and Apparatus", the entire contents of which are incorporated herein by reference. Technical Field This application relates to the field of wireless communication technology, and in particular to a communication method and apparatus. Background Technology Currently, new radio (NR) supports time division duplex (TDD) and frequency division duplex (FDD). In TDD systems, downlink time slots account for a larger proportion, which limits the performance indicators of uplink coverage, latency, and capacity. Therefore, how to allocate resources to improve uplink coverage is a problem that needs to be solved. Summary of the Invention This application provides a communication method and apparatus to improve uplink coverage. In a first aspect, a communication method is provided, applied to a network device, the method comprising the following steps: sending first configuration information, the first configuration information indicating a first downlink carrier, a first uplink carrier, and a second uplink carrier, wherein the first downlink carrier is used for downlink data transmission, and the first uplink carrier and the second uplink carrier are used for uplink data transmission, the first downlink carrier and the first uplink carrier respectively performing downlink data transmission and uplink data transmission in a TDD mode; wherein the first downlink carrier, the first uplink carrier, and the second uplink carrier are located in a first frequency band; and according to the first configuration information, using at least one of the first downlink carrier, the first uplink carrier, and the second uplink carrier to perform data transmission with a terminal device. In the above implementation, by configuring a first downlink carrier, a first uplink carrier, and a second uplink carrier in the first frequency band, and using the first downlink carrier and the first uplink carrier in a TDD manner, compared with the current TDD system, since the embodiments of this application can configure uplink carriers in both the first frequency domain resources and the second frequency domain resources in the first frequency band, uplink coverage can be improved, uplink transmission latency can be reduced, and uplink capacity can be increased. Optionally, the first downlink carrier and the second uplink carrier perform downlink data transmission and uplink data transmission respectively in FDD mode. In the above implementation, by configuring a first downlink carrier, a first uplink carrier, and a second uplink carrier within the first frequency band, and using the first downlink carrier and the first uplink carrier in TDD mode, the first downlink carrier and the second uplink carrier are also used in FDD mode. This allows the first frequency band to simultaneously possess both TDD and FDD duplex modes. On the one hand, compared to the current TDD system, since this embodiment can configure uplink carriers in both the first and second frequency domain resources within the first frequency band, it can improve uplink coverage, reduce uplink transmission latency, and increase uplink capacity. On the other hand, since this embodiment can configure the first downlink carrier and the first uplink carrier in the first frequency domain resources of the first frequency band, it supports downlink and uplink data transmission on the first frequency domain resources. That is, uplink and downlink transmission can be performed in TDD mode at the same frequency. Compared to the FDD system, this can improve the reciprocity between the uplink and downlink channels and increase downlink transmission performance. In one possible implementation, the first frequency band includes a first frequency domain resource and a second frequency domain resource. The first frequency domain resource is used for uplink and downlink transmission in TDD mode, and the second frequency domain resource is used only for uplink transmission. The first downlink carrier and the first uplink carrier are located within the first frequency domain resource, and the second uplink carrier is located within the second frequency domain resource. Optionally, the first frequency domain resource and the second frequency domain resource are predefined. Optionally, the first frequency domain resources may be continuous or discontinuous, and the second frequency domain resources may be continuous or discontinuous. In one possible implementation, the first frequency domain resource and the second frequency domain resource are not contiguous. In one possible implementation, a first guard band exists between the first downlink carrier and the second uplink carrier, and the first guard band is not used for data transmission; or, a first guard band exists between the first