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EP-4742710-A1 - COMMUNICATION METHOD AND APPARATUS

EP4742710A1EP 4742710 A1EP4742710 A1EP 4742710A1EP-4742710-A1

Abstract

This application provides a communication method and apparatus. The communication method includes: receiving at least one piece of control information, where each piece of control information is associated with at least one time-frequency resource, and each time-frequency resource corresponds to at least one first resource block; and sending at least one feedback channel on a first frequency domain resource, where each feedback channel corresponds to one piece of control information, the first frequency domain resource includes N first resource blocks and M second resource blocks, each feedback channel occupies at least one first resource block, transmit power of the first frequency domain resource is less than or equal to maximum transmit power, a ratio of transmit power of each second resource block to transmit power of each first resource block that is located in a same resource block set as the second resource block is β, β is less than or equal to 1, and N and M are integers greater than or equal to 1. In this application, the ratio of the transmit power of the first resource block to the transmit power of the second resource block is specified, to increase the transmit power of the first resource block, and improve feedback channel detection performance.

Inventors

  • JIAO, Ruicheng
  • HE, Hongli
  • LI, CHAO

Assignees

  • Huawei Technologies Co., Ltd.

Dates

Publication Date
20260513
Application Date
20240716

Claims (20)

  1. A communication method, comprising: receiving at least one piece of control information, wherein each piece of control information is associated with at least one time-frequency resource, and each time-frequency resource corresponds to at least one first resource block; and sending at least one feedback channel on a first frequency domain resource, wherein each feedback channel corresponds to one time-frequency resource associated with one piece of control information, the first frequency domain resource comprises N first resource blocks and M second resource blocks, each feedback channel occupies at least one first resource block, transmit power of the first frequency domain resource is less than or equal to maximum transmit power, a ratio of transmit power of each second resource block to transmit power of each first resource block that is located in a same resource block set as the second resource block is β, β is less than or equal to 1, and N and M are integers greater than or equal to 1.
  2. The method according to claim 1, wherein the method further comprises: allocating transmit power of an i th feedback channel to the M second resource blocks and the N first resource blocks in the first frequency domain resource, wherein i is greater than or equal to 1.
  3. The method according to claim 2, wherein the method comprises: determining transmit power of each first resource block and transmit power of each second resource block in the first frequency domain resource based on a quantity T of sent feedback channels, transmit power of each feedback channel, β, the quantity N of first resource blocks in the first frequency domain resource, and the quantity M of second resource blocks in the first frequency domain resource.
  4. The method according to claim 3, wherein the method comprises: P 1 , avg = P − 10 log 10 N / T + M × β / T ; P 2 , avg = P − 10 log 10 N / β × T + M / T ; or P 2 , avg = P 1 , avg − 10 log 10 1 β , wherein P is the transmit power of each feedback channel, P 1, avg is the transmit power of each first resource block in the first frequency domain resource, and P 2 ,avg is the transmit power of each second resource block in the first frequency domain resource.
  5. The method according to claim 1, wherein the method further comprises: allocating transmit power of an i th feedback channel to the first resource block occupied by the i th feedback channel and the second resource block that is located in a same resource block set as the i th feedback channel, wherein i is greater than or equal to 1.
  6. The method according to claim 5, wherein the method comprises: determining, based on a quantity Ti of feedback channels that are located in the same resource block set as the i th feedback channel, the transmit power of the i th feedback channel, a quantity ki of first resource blocks occupied by the i th feedback channel, a quantity Mi of second resource blocks that are located in the same resource block set as the i th feedback channel, and β, transmit power of each first resource block occupied by the i th feedback channel and transmit power of each second resource block that is located in the same resource block set as the i th feedback channel.
  7. The method according to claim 6, wherein the method comprises: P 1 , avg i = P i − 10 log 10 ki + Mi × β / Ti ; P 2 , avg i = P i − 10 log 10 ki / β + Mi / Ti ; or P 2 , avg i = P 1 , avg i − 10 log 10 1 β , wherein P ( i ) is the transmit power of the i th feedback channel, P 1, avg ( i ) is the transmit power of each first resource block occupied by the i th feedback channel, and P 2 ,avg (i) is the transmit power of each second resource block that is located in the same resource block set as the i th feedback channel.
  8. The method according to claim 1, wherein the method further comprises: determining transmit power of each first resource block in the first frequency domain resource and transmit power of each second resource block in the first frequency domain resource based on the maximum transmit power, the quantity M of all second resource blocks in the first frequency domain resource, the quantity N of all first resource blocks in the first frequency domain resource, and β.
  9. The method according to claim 8, wherein the method comprises: P 1 , avg = P CMAX − 10 log 10 N + M × β ; P 2 , avg = P CMAX − 10 log 10 N / β + M ; or P 2 , avg = P 1 , avg − 10 log 10 1 β , wherein P CMAX is the maximum transmit power, P 1, avg is the transmit power of each first resource block in the first frequency domain resource, and P 2,avg is the transmit power of each second resource block in the first frequency domain resource.
  10. The method according to claim 1, 8, or 9, wherein the method further comprises: determining transmit power of an i th feedback channel based on the maximum transmit power, the quantity M of second resource blocks in the first frequency domain resource, the quantity N of first resource blocks in the first frequency domain resource, a quantity ki of first resource blocks occupied by the i th feedback channel, and β.
  11. The method according to claim 10, wherein the method comprises: P i = P CMAX − 10 log 10 N + M × β ki + M × β , wherein P CMAX is the maximum transmit power, and P (i) is the transmit power of the i th feedback channel.
  12. The method according to claim 1, 8, or 9, wherein the method further comprises: determining transmit power of an i th feedback channel based on the maximum transmit power, the quantity M of second resource blocks in the first frequency domain resource, the quantity N of first resource blocks in the first frequency domain resource, a quantity ki of first resource blocks occupied by the i th feedback channel, a quantity Mi of second resource blocks that are located in a same resource block set as the i th feedback channel, and β.
  13. The method according to claim 12, wherein the method comprises: P i = P CMAX − 10 log 10 N + M × β ki + Mi × β , wherein P CMAX is the maximum transmit power, and P ( i ) is the transmit power of the i th feedback channel.
  14. The method according to claim 1, wherein both transmit power of each second resource block and transmit power of each first resource block do not exceed first power, and the first power is determined based on a downlink path loss.
  15. The method according to claim 14, wherein the method comprises: the power of each second resource block is P 1 + 10 log 10 ( β ), the power of each first resource block is P 1, and P 1 is the first power.
  16. The method according to claim 14 or 15, wherein the method further comprises: determining transmit power of an i th feedback channel based on the quantity M of second resource blocks in the first frequency domain resource, a quantity ki of first resource blocks occupied by the i th feedback channel, the first power, and β.
  17. The method according to claim 16, wherein the method comprises: P i = P 1 + 10 log 10 ki + M × β , wherein P(i) is the transmit power of the i th feedback channel, and P 1 is the first power.
  18. The method according to claim 14 or 15, wherein the method further comprises: determining transmit power of an i th feedback channel based on a quantity Mi of second resource blocks that are located in a same resource block set as the i th feedback channel, a quantity ki of first resource blocks occupied by the i th feedback channel, the first power, and β.
  19. The method according to claim 18, wherein the method comprises: P i = P 1 + 10 log 10 ki + Mi × β , wherein P(i) is the transmit power of the i th feedback channel, and P 1 is the first power.
  20. The method according to claim 14, wherein the method comprises: determining the transmit power of each first resource block based on the maximum transmit power, the first power, the quantity M of second resource blocks in the first frequency domain resource, the quantity N of first resource blocks in the first frequency domain resource, and β.

Description

This application claims priority to Chinese Patent Application No. 202311018798.8, filed with the China National Intellectual Property Administration on August 11, 2023, and entitled "COMMUNICATION METHOD AND APPARATUS", which is incorporated herein by reference in its entirety. TECHNICAL FIELD This application relates to the communication field, and more specifically, to a communication method and apparatus. BACKGROUND In sidelink (sidelink, SL) communication, enabling an unlicensed spectrum is an important evolution direction. In the unlicensed spectrum, a terminal may use a spectrum resource through contention. In a possible manner, the terminal contends for a channel (channel occupancy time, COT) in a listen-before-talk (listen-before-talk, LBT) manner, to use the COT. If the terminal successfully performs the LBT, the terminal may send data by using the COT, and the terminal may further share the COT with another terminal. The terminal apparatus may send feedback information through a physical sidelink feedback channel (physical sidelink feedback channel, PSFCH), and the feedback information is carried in a dedicated physical resource block (dedicated PRB). However, in the unlicensed spectrum, in an actual feedback process of a receive end, to meet a channel occupation requirement, a common physical resource block (common PRB) is introduced to occupy a frequency domain resource. However, transmit power of the dedicated physical resource block may be split to the common physical resource block, affecting PSFCH detection performance. SUMMARY This application provides a communication method and apparatus, to increase transmit power of a first resource block used to carry feedback information, and improve PSFCH detection performance. According to a first aspect, a communication method is provided. The method may be performed by a first terminal apparatus, or may be performed by a chip or a circuit used in the first terminal apparatus. This is not limited in this application. For ease of description, the following uses an example in which the method is performed by the first terminal apparatus for description. The method includes: A first terminal apparatus receives at least one piece of control information, where each piece of control information is associated with at least one time-frequency resource, and each time-frequency resource corresponds to at least one first resource block. The first terminal apparatus sends at least one feedback channel on a first frequency domain resource, where each feedback channel corresponds to one time-frequency resource associated with one piece of control information, the first frequency domain resource includes N first resource blocks and M second resource blocks, each feedback channel occupies at least one first resource block, transmit power of the first frequency domain resource is less than or equal to maximum transmit power, a ratio of transmit power of each second resource block to transmit power of each first resource block that is located in a same resource block set as the second resource block is β; β is less than or equal to 1, and N and M are integers greater than or equal to 1. In embodiments of this application, the first resource block is used to carry feedback information in the feedback channel, and the second resource block is used to occupy a channel bandwidth. A relationship between the transmit power of the second resource block and the transmit power of the first resource block is specified, to ensure that the first resource block can occupy sufficient transmit power, and improve transmit quality of the feedback channel, thereby improving feedback channel detection performance. According to the first aspect, in some implementations of the first aspect, the method further includes: allocating transmit power of an ith feedback channel to the M second resource blocks and the N first resource blocks in the first frequency domain resource, where i is greater than or equal to 1. According to the first aspect, in some implementations of the first aspect, the method further includes: determining transmit power of each first resource block and transmit power of each second resource block in the first frequency domain resource based on a quantity T of sent feedback channels, transmit power of each feedback channel, β, the quantity N of first resource blocks in the first frequency domain resource, and the quantity M of second resource blocks in the first frequency domain resource. According to the first aspect, in some implementations of the first aspect, the method includes: P1,avg=P−10log10N/T+M×β/T; P2,avg=P−10log10N/β×T+M/T; or P2,avg=P1,avg−10log101β. P is the transmit power of each feedback channel, P1,avg is the transmit power of each first resource block in the first frequency domain resource, and P2,avg is the transmit power of each second resource block in the first frequency domain resource. According to the first aspect, in some implementations of