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CN-122001730-A - Communication method and device

CN122001730ACN 122001730 ACN122001730 ACN 122001730ACN-122001730-A

Abstract

The present application relates to the field of communications technologies, and in particular, to a communications method and apparatus. The application can be applied to IEEE802.11ax standard, 802.11be standard, 802.11bn standard and the like, and other standards of IEEE802.11 series, such as 802.15 standard, 802.11bf standard or IMMW standard or star flash standard and the like. In the method provided by the embodiment of the application, when 4 52-tone RUs are adopted to carry the same data, the values carried on the subcarriers with the odd indexes in two 52-tone RUs in the 4 52-tone RUs are inverted, or the values carried on the subcarriers with the even indexes in two 52-tone RUs in the 4 52-tone RUs are opposite. The PAPR in the ELR duplication transmission can be effectively reduced by inverting the value carried on part of the sub-carriers.

Inventors

  • LIU CHENCHEN
  • ZHOU ZHENGCHUN
  • YANG YANG

Assignees

  • 华为技术有限公司

Dates

Publication Date
20260508
Application Date
20241106

Claims (14)

  1. 1.A method of communication, the method comprising: Generating a data field, wherein the data field corresponds to a plurality of resource units RU, the plurality of RUs have the same size, the plurality of RUs comprise RU1, RU3 and RU4, the value borne on a kth 1 subcarrier in RU3 is opposite to the value borne on a kth 1 subcarrier in RU1, the value borne on a kth 2 subcarrier in RU4 is opposite to the value borne on a kth 2 subcarrier in RU1, wherein k1 is an odd number in N ST -1 or more, k2 is an even number in N ST -1 or more, 0 or less, or k1 is an even number in N ST -1 or more, 0 or less, k2 is an odd number in N ST -1, N ST is equal to the total number of subcarriers in RU; and transmitting the data field.
  2. 2. The method of claim 1, wherein the plurality of RUs further comprises RU2, wherein a value carried on a kth subcarrier in the RU2 is the same as a value carried on a kth subcarrier in the RU1, and wherein k is an integer greater than or equal to 0 and less than or equal to N ST -1.
  3. 3. The method according to claim 1 or 2, wherein the value carried on the kth 1 subcarrier in RU3 is opposite to the value carried on the kth 1 subcarrier in RU1, and the value carried on the kth 2 subcarrier in RU4 is opposite to the value carried on the kth 2 subcarrier in RU1, comprising: For the same orthogonal frequency division multiplexing OFDM symbol in the data field, the value carried on the kth 1 subcarrier in the RU3 is opposite to the value carried on the kth 1 subcarrier in the RU1, and the value carried on the kth 2 subcarrier in the RU4 is opposite to the value carried on the kth 2 subcarrier in the RU 1.
  4. 4. A method according to any of claims 1-3, wherein the value carried on the kth 1 subcarrier in RU3 is opposite to the value carried on the kth 1 subcarrier in RU1, and the value carried on the kth 2 subcarrier in RU4 is opposite to the value carried on the kth 2 subcarrier in RU1, comprising: for the same spatial stream, and for the same OFDM symbol in the data field, the value carried on the kth 1 subcarrier in RU3 is opposite to the value carried on the kth 1 subcarrier in RU1, and the value carried on the kth 2 subcarrier in RU4 is opposite to the value carried on the kth 2 subcarrier in RU 1.
  5. 5. The method according to any of claims 1-4, wherein said transmitting said data field comprises: and transmitting an enhanced remote physical layer protocol data unit (ELR PPDU) including the data field.
  6. 6. A method of communication, the method comprising: receiving a data field; Processing the data field, where the data field corresponds to a plurality of resource units RU, the plurality of RU have the same size, the plurality of RU include RU1, RU3 and RU4, a value carried on a kth 1 subcarrier in the RU3 is opposite to a value carried on a kth 1 subcarrier in the RU1, a value carried on a kth 2 subcarrier in the RU4 is opposite to a value carried on a kth 2 subcarrier in the RU1, where k1 is an odd number of N ST -1 or less and greater than 0, and k2 is an even number of N ST -1 or less than 0, or k1 is an even number of N ST -1 or greater than 0 and less than or equal to 0, and N ST is an odd number of N ST -1, and N ST is equal to the total number of subcarriers in the RU.
  7. 7. The method of claim 6, wherein the plurality of RUs further comprises RU2, wherein a value carried on a kth subcarrier in the RU2 is the same as a value carried on a kth subcarrier in the RU1, and wherein k is an integer greater than or equal to 0 and less than or equal to N ST -1.
  8. 8. The method according to claim 6 or 7, wherein the received data field comprises: an enhanced remote physical layer protocol data unit ELR PPDU including the data field is received.
  9. 9. A communication device comprising means for performing the method of any of claims 1-8.
  10. 10. A communication device comprising a processor for causing the communication device to implement the method of any one of claims 1-8.
  11. 11. A chip comprising logic circuitry and an interface, the logic circuitry and the interface being coupled, the logic circuitry to cause the chip to implement the method of any of claims 1-8.
  12. 12. A computer readable storage medium for storing a computer program which, when executed by a computer, is adapted to carry out the method of any one of claims 1-8.
  13. 13. A computer program product, characterized in that the computer program product, when executed by a computer, is adapted to carry out the method according to any one of claims 1-8.
  14. 14. A communication system comprising a first station for performing the method of any of claims 1-5 and a second station for performing the method of any of claims 6-8.

Description

Communication method and device Technical Field The present application relates to the field of communications technologies, and in particular, to a communications method and apparatus. Background A wireless local area network (wireless local area network, WLAN) starts from 802.11a/b/g and goes through 802.11n,802.11ac,802.11ax,802.11be, and 802.11bn. Where the 802.11a/b/g standard is collectively referred to as non-high throughput (non high throughput, non-HT), the 802.11n standard is referred to as High Throughput (HT), the 802.11ac standard is referred to as very high throughput (very high throughput, VHT), the 802.11ax standard is referred to as high efficiency (HIGH EFFICIENT, HE), the 802.11be standard is referred to as very high throughput (extremely high throughput, EHT), and the 802.11bn standard is referred to as ultra reliable (ultra high reliability, UHR). As WLAN-based internet of things (internetofthings, ioT) devices are increasing and it is difficult to deploy multiple Access Points (APs) in a home environment, there is an increasing need for WLANs to be able to support long-range transmissions. The 802.11b standard adopts a direct-sequence spread spectrum (DSSS) modulation mode to convert digital signals into analog signals with wider frequency bandwidth so as to enhance the reliability of data transmission. But the long-range transmission scheme based on the 802.11b standard is low in spectrum efficiency, and the standard is old, so that network management is difficult. Thus, in 802.11bn or subsequent standards, long-range transmission, such as enhanced long-range (enhanced long range, ELR) transmission based on orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) modulation, has become one of the hot spots of research. In view of this, there is a need to address how to reduce the peak-to-average power ratio (peak to average power ratio, PAPR). Disclosure of Invention The embodiment of the application provides a communication method and a communication device, which can reduce the PAPR of a data field (datafield). In a first aspect, an embodiment of the present application provides a communication method, where the method may be applied to a first site, or a chip or a functional module in the first site, etc. The first station may include a WLAN device such as an IoT device or the like. The method comprises the following steps: Generating a data field corresponding to a plurality of resource units (resource allocation, RU) having the same size (size), the plurality of RUs including RU1, RU3, and RU4, a value carried on a kth 1 subcarrier in RU3 being opposite to a value carried on a kth 1 subcarrier in RU1, a value carried on a kth 2 subcarrier in RU4 being opposite to a value carried on a kth 2 subcarrier in RU1, wherein k1 is an odd number of greater than or equal to 0 and less than or equal to N ST -1, k2 is an even number of greater than or equal to 0 and less than or equal to N ST -1, or k1 is an even number of greater than or equal to 0 and less than or equal to N ST -1, k2 is an odd number of greater than or equal to 0 and less than or equal to N ST -1, N ST is equal to the total number of subcarriers in RU, and transmitting the data field. The RU carries the same data. Or, the effective information carried by the RU is the same. The validity information refers to the valid content carried by the data field. Although the plurality of RUs described above carry the same data, the values carried on a particular subcarrier may be phase rotated when mapping data onto each subcarrier in the plurality of RUs. For example, the value carried on the kth 1 subcarrier in RU3 is obtained by phase-rotating the value carried on the kth 1 subcarrier in RU 1. For another example, the value carried on the kth 2 subcarrier in RU4 is obtained by phase rotating the value carried on the kth 2 subcarrier in RU 1. In the embodiment of the application, the values carried on each subcarrier in RU3, RU4 and RU1 can reduce the in-phase superposition condition as much as possible when the values carried on the RUs correspond to the time domain signal, reduce the PAPR and improve the system performance by meeting the above relation. For the same RU, the time-domain signal corresponding to the RU is determined according to the value carried on the N ST subcarriers corresponding to each of the N sampling points. Whether the time domain signal corresponding to the nth sampling point and the n+n/2 th sampling point increases or decreases the PAPR is determined according to whether k in the kth subcarrier in the N ST subcarriers is an odd number or an even number. Therefore, when the plurality of RUs carry the same data, the PAPR can be reduced by performing phase rotation on a specific subcarrier. With reference to the first aspect, in one possible implementation manner, transmitting the data field includes transmitting an enhanced long range physical layer protocol data unit