CN-122028191-A - Method and device for signal transmission

Abstract

The application provides a signal transmission method and a signal transmission device, which can improve the uplink coverage capacity of a communication device. The method comprises the steps that a first communication device receives first information from the first communication device, the first information indicates at least one first subcarrier, the first communication device sends a first signal on the at least one first subcarrier, and sends a second signal on at least one second subcarrier, the second signal is a signal carrying uplink data, the first signal is used for adjusting the peak average power ratio of signals transmitted on a plurality of uplink scheduling subcarriers, the transmission power of the first signal is determined according to the transmission power and the power threshold value of the second signal, the time unit for sending the first signal is identical to the time unit for sending the second signal, and the plurality of uplink scheduling subcarriers comprise at least one first subcarrier and at least one second subcarrier.

Inventors

• XU RUI
• QIN YI
• ZHOU GUOHUA

Assignees

• 华为技术有限公司

Dates

Publication Date

20260512

Application Date

20241112

Claims (17)

1. 1. A method of signal transmission, the method comprising: receiving first information, the first information indicating at least one first subcarrier; And transmitting a first signal on the at least one first subcarrier, and transmitting a second signal on at least one second subcarrier, wherein the second signal is a signal carrying uplink data, the first signal is used for adjusting the peak-to-average power ratio of signals transmitted on a plurality of uplink scheduled subcarriers, the transmitting power of the first signal is determined according to the transmitting power and the power threshold value of the second signal, the time unit for transmitting the first signal is the same as the time unit for transmitting the second signal, and the plurality of subcarriers comprise the at least one first subcarrier and the at least one second subcarrier.
2. 2. The method of claim 1, wherein the step of determining the position of the substrate comprises, The adjusted peak average power ratio is smaller than or equal to a preset threshold value.
3. 3. The method according to claim 1 or 2, further comprising: And transmitting second information, wherein the second information indicates information of subcarriers which are expected to be reserved, and the first information is determined according to the second information.
4. 4. The method of claim 3, wherein the step of, The information of the subcarriers desiring to reserve includes information of at least one subcarrier set desiring to reserve, the first information includes information of a first subcarrier set desiring to reserve including the at least one first subcarrier, and the at least one subcarrier set desiring to reserve includes the first subcarrier set desiring to reserve.
5. 5. The method of claim 3, wherein the step of, The information of the desired reserved sub-carriers includes the number of desired reserved sub-carriers or the ratio of the total bandwidth of the desired reserved sub-carriers to the total bandwidth of the plurality of sub-carriers.
6. 6. The method of claim 5, wherein the step of determining the position of the probe is performed, The first information includes information of a first subcarrier or information of a last subcarrier of the at least one first subcarrier, the at least one first subcarrier being consecutive, or The first information comprises information corresponding to the at least one first sub-carrier respectively, or The first information includes information of at least one reserved subcarrier set including the at least one first subcarrier.
7. 7. A method of signal transmission, the method comprising: transmitting first information, the first information indicating at least one first subcarrier; And receiving a first signal on the at least one first subcarrier, receiving a second signal on at least one second subcarrier, wherein the second signal is a signal carrying uplink data, the first signal is used for adjusting the peak-to-average power ratio of signals transmitted on a plurality of uplink scheduled subcarriers, the transmitting power of the first signal is determined according to the transmitting power and the power threshold value of the second signal, the time unit for receiving the first signal is the same as the time unit for receiving the second signal, and the plurality of subcarriers comprise the at least one first subcarrier and the at least one second subcarrier.
8. 8. The method of claim 7, wherein the step of determining the position of the probe is performed, The adjusted peak average power ratio is smaller than or equal to a preset threshold value.
9. 9. The method according to claim 7 or 8, further comprising: second information is received, the second information indicating information of subcarriers that are desired to be reserved, and the first information is determined according to the second information.
10. 10. The method of claim 9, wherein the step of determining the position of the substrate comprises, The information of the subcarriers desiring to reserve includes information of at least one subcarrier set desiring to reserve, the first information includes information of a first subcarrier set desiring to reserve including the at least one first subcarrier, and the at least one subcarrier set desiring to reserve includes the first subcarrier set desiring to reserve.
11. 11. The method of claim 9, wherein the step of determining the position of the substrate comprises, The information of the desired reserved sub-carriers includes the number of desired reserved sub-carriers or the ratio of the total bandwidth of the desired reserved sub-carriers to the total bandwidth of the plurality of sub-carriers.
12. 12. The method of claim 11, wherein the step of determining the position of the probe is performed, The first information includes information of a first subcarrier or information of a last subcarrier of the at least one first subcarrier, the at least one first subcarrier being consecutive, or The first information comprises information corresponding to the at least one first sub-carrier respectively, or The first information includes information of at least one reserved subcarrier set including the at least one first subcarrier.
13. 13. A communication device comprising means for performing the method of any one of claims 1 to 6 or means for performing the method of any one of claims 7 to 12.
14. 14. A communication device comprising a processor for implementing the method of any one of claims 1 to 6 or for implementing the method of any one of claims 7 to 12.
15. 15. A communication system comprising a first communication device for implementing the method of any one of claims 1 to 6, and a second communication device for implementing the method of any one of claims 7 to 12.
16. 16. A computer-readable storage medium, comprising: The computer readable medium stores a computer program; the computer program, when executed by a processor, causes the method of any one of claims 1 to 12 to be performed.
17. 17. A computer program product comprising a computer program which, when executed, causes the method of any one of claims 1 to 12 to be performed.

Description

Method and device for signal transmission Technical Field The present application relates to the field of communications, and more particularly, to a method and apparatus for signal transmission. Background In recent years, with the continuous development of 5G communication systems, data transmission delay is continuously reduced, transmission capacity is larger and larger, and the 5G communication systems gradually infiltrate some multimedia services with strong real-time performance and large data capacity requirements, such as video transmission, cloud Gaming (CG), extended Reality (XR), and intelligent robots, where XR includes Virtual Reality (VR) and augmented Reality (augmented Reality, AR). The uplink coverage capability of the New Radio (NR) cannot meet the service requirements of XR, intelligent robot, etc. for multimedia services, such as large data volume, low latency, and high reliability. The main reasons for the limited uplink coverage include limited transmit power of the terminal device, low signal-to-noise ratio (signal to noise ratio, SNR), and high peak-to-average power ratio (peak to average power ratio, PAPR) based on orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) waveforms, and the need for back-off of the transmit power to further reduce the transmit power of the terminal device in order for the Power Amplifier (PA) to operate in the linear region. Disclosure of Invention The application provides a signal transmission method and a signal transmission device, which can improve the uplink coverage capacity of a communication device. In a first aspect, a method of signal transmission is provided, which may be applied to, for example, performed by, a first communication device, which may be a terminal device or a module (e.g., a circuit, a chip, a system on a chip, or a processor) in a terminal device, or may be a logic node, a logic module, or software that may implement all or part of the functionality of the terminal device. The method comprises the steps of receiving first information, wherein the first information indicates at least one first subcarrier, sending a first signal on the at least one first subcarrier, sending a second signal on at least one second subcarrier, wherein the second signal is a signal carrying uplink data, the first signal is used for adjusting the peak-to-average power ratio of signals transmitted on a plurality of uplink scheduled subcarriers, the transmission power of the first signal is determined according to the transmission power and a power threshold value of the second signal, a time unit for sending the first signal is the same as a time unit for sending the second signal, and the plurality of subcarriers comprise the at least one first subcarrier and the at least one second subcarrier. Based on the above technical solution, the first communication device sends the first signal on at least one first subcarrier (reserved subcarrier), and sends the second signal carrying uplink data on at least one second subcarrier (uplink scheduled subcarrier except reserved subcarrier), where the first signal is used to adjust the peak-to-average power ratio of the signals transmitted on the multiple uplink scheduled subcarriers, so that the higher PAPR of the signals transmitted on the multiple uplink scheduled subcarriers can be avoided, so that the transmission power of the signals carrying uplink data does not need to be reduced, and the uplink coverage capability of the first communication device can be improved. With reference to the first aspect, in certain implementation manners of the first aspect, the adjusted peak-to-average power ratio is less than or equal to a preset threshold. Based on the optional implementation manner, the PAPR of the signal transmitted on the plurality of subcarriers of the uplink scheduling is avoided from being higher, and the transmitting power of the signal carrying uplink data is not required to be reduced, so that the uplink coverage capability of the first communication device can be improved. With reference to the first aspect, in certain implementation manners of the first aspect, the method further includes transmitting second information, where the second information indicates information of subcarriers that are expected to be reserved, and the first information is determined according to the second information. Based on this alternative implementation, the second communication device may determine the first information (at least one first subcarrier/reserved subcarrier) from the second information sent by the first communication device. With reference to the first aspect, in certain implementations of the first aspect, the information of the subcarriers desiring to reserve includes information of at least one subcarrier set desiring to reserve, the first information includes information of a first subcarrier set desiring to reserve, the first subcarrier set desiring to r