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EP-4738750-A1 - COMMUNICATION METHOD AND APPARATUS

EP4738750A1EP 4738750 A1EP4738750 A1EP 4738750A1EP-4738750-A1

Abstract

Embodiments of this application disclose a communication method and apparatus. The method includes: A first network device generates a first signal based on a first sequence, where the first sequence is a product of a second sequence and a third sequence, the second sequence carries data, the i th element in the second sequence corresponds to the i th subcarrier in N subcarriers in a first frequency domain resource, the i th element in the third sequence corresponds to the i th subcarrier in the first frequency domain resource, the i th element in the first sequence is carried on the i th subcarrier in the first frequency domain resource, the first frequency domain resource includes M non-overlapping frequency domain subresources, the third sequence includes M subsequences, the t th subsequence in the M subsequences corresponds to the t th frequency domain subresource in the M frequency domain subresources, and the t th subsequence in the M subsequences satisfies the t th relationship in the M relationships. The first network device sends the first signal. According to embodiments of this application, ranging precision of the integrated sensing and communication signal is improved.

Inventors

  • WANG, Zhonglong
  • XIE, Xinqian
  • SHAO, Jiafeng
  • YE, WEI
  • LI, Hantao

Assignees

  • Huawei Technologies Co., Ltd.

Dates

Publication Date
20260506
Application Date
20240729

Claims (20)

  1. A communication method, wherein the method comprises: generating, by a first network device, a first signal based on a first sequence, wherein the first sequence is a product of a second sequence and a third sequence, wherein the first sequence comprises N first elements, the second sequence comprises N second elements, the second sequence carries data, and the third sequence comprises N third elements greater than or equal to 0; the i th element in the second sequence corresponds to the i th subcarrier in N subcarriers in a first frequency domain resource, the i th element in the third sequence corresponds to the i th subcarrier in the first frequency domain resource, the i th element in the first sequence is carried on the i th subcarrier in the first frequency domain resource, N is an integer greater than 1, and i is an integer greater than or equal to 1 and less than or equal to N; and the first frequency domain resource comprises M non-overlapping frequency domain subresources, the third sequence comprises M subsequences, the t th subsequence in the M subsequences corresponds to the t th frequency domain subresource in the M frequency domain subresources, the t th subsequence in the M subsequences satisfies the t th relationship in M relationships, M is an integer greater than or equal to 2 and less than or equal to N, and t is an integer greater than or equal to 1 and less than or equal to M; and sending, by the first network device, the first signal.
  2. The method according to claim 1, wherein the i th element in the third sequence is equal to the (N-i+1) th element in the third sequence.
  3. The method according to claim 1 or 2, wherein values of elements in at least one of the M subsequences are all the same.
  4. The method according to any one of claims 1 to 3, wherein M is equal to 3, a start frequency of the t1 th frequency domain subresource in the M frequency domain subresources is less than a start frequency of the t2 th frequency domain subresource in the M frequency domain subresources, t1 is an integer greater than or equal to 1 and less than M, t2 is an integer greater than 1 and less than or equal to M, and t1 is less than t2; the 1 st subsequence in the M subsequences satisfies the 1 st relationship in the M relationships, and the 1 st relationship is: values of elements in the 1 st subsequence are all first values; the 2 nd subsequence in the M subsequences satisfies the 2 nd relationship in the M relationships, and the 2 nd relationship is: values of elements in the 2 nd subsequence are all second values, a value of an element in the 2 nd subsequence satisfies a polynomial function of a square of ( k -( N -1)/2), or a value of an element in the 2 nd subsequence satisfies a functional relationship 1 μ k − N − 1 2 2 + ν + s , wherein 12 ν μ N − 1 N N + 1 > 0.5 , k is a sequence number, in the third sequence, of an element in the 2 nd subsequence, µ is less than 0, v is greater than 0, and s is greater than 0; the 3 rd subsequence in the M subsequences satisfies the 3 rd relationship in the M relationships, and the 3 rd relationship is: values of elements in the 3 rd subsequence are all third values; and the first value and the third value are both greater than the second value.
  5. The method according to any one of claims 1 to 3, wherein M is equal to 5, a start frequency of the t1 th frequency domain subresource in the M frequency domain subresources is less than a start frequency of the t2 th frequency domain subresource in the M frequency domain subresources, t1 is an integer greater than or equal to 1 and less than M, t2 is an integer greater than 1 and less than or equal to M, and t1 is less than t2; the 1 st subsequence in the M subsequences satisfies the 1 st relationship in the M relationships, and the 1 st relationship is: values of elements in the 1 st subsequence are all first values; the 2 nd subsequence in the M subsequences satisfies the 2 nd relationship in the M relationships, and the 2 nd relationship is: values of elements in the 2 nd subsequence are all 1s; the 3 rd subsequence in the M subsequences satisfies the 3 rd relationship in the M relationships, and the 3 rd relationship is: values of elements in the 3 rd subsequence are all second values, a value of an element in the 3 rd subsequence satisfies a polynomial function of a square of ( k -( N -1)/2), or a value of an element in the 3 rd subsequence satisfies a functional relationship 1 μ k − N − 1 2 2 + ν + s , wherein 12 ν μ N − 1 N N + 1 > 0.5 , k is a sequence number, in the third sequence, of an element in the 3 rd subsequence, µ is less than 0, v is greater than 0, and s is greater than 0; the 4 th subsequence in the M subsequences satisfies the 4 th relationship in the M relationships, and the 4 th relationship is: values of elements in the 4 th subsequence are all 1s; the 5 th subsequence in the M subsequences satisfies the 5 th relationship in the M relationships, and the 5 th relationship is: values of elements in the 5 th subsequence are all third values; and the first value and the third value are both greater than 1, and the second value is greater than 0 and less than or equal to 1.
  6. The method according to any one of claims 1 to 3, wherein the 1 st subsequence in the M subsequences satisfies the 1 st relationship in the M relationships, and the 1 st relationship is: the k1 th element in the 1 st subsequence is greater than or equal to the k2 th element in the 1 st subsequence; the 2 nd subsequence in the M subsequences satisfies the 2 nd relationship in the M relationships, and the 2 nd relationship is: the k th element in the 2 nd subsequence is greater than or equal to a smaller value in the k1 th element in the 2 nd subsequence and the k2 th element in the 2 nd subsequence; the 3 rd subsequence in the M subsequences satisfies the 3 rd relationship in the M relationships, and the 3 rd relationship is: the k1 th element in the 3 rd subsequence is less than or equal to the k2 th elements in the 3 rd subsequence; and k, k1, and k2 are all integers greater than or equal to 1 and less than or equal to N, k2 is greater than k1, and k is greater than or equal to k1 and less than or equal to k2.
  7. The method according to claim 4 or 5, wherein the method further comprises: sending, by the first network device, first information to a second network device and/or a terminal device, wherein the first information indicates parameter information of the third sequence, and the parameter information comprises at least one of the following: the first value, the second value, the third value, µ, v, s, and M.
  8. The method according to any one of claims 1 to 7, wherein the first signal is used for sensing, the first signal is used for sensing and channel measurement, the first signal is used for sensing and channel estimation, or the first signal is used for sensing and data transmission.
  9. The method according to any one of claims 1 to 8, wherein the method further comprises: receiving, by the first network device, an echo signal of the first signal.
  10. A communication method, wherein the method comprises: receiving, by a second network device, an echo signal of a first signal, wherein the first signal is generated based on a first sequence, and the first sequence is a product of a second sequence and a third sequence, wherein the first sequence comprises N first elements, the second sequence comprises N second elements, the second sequence carries data, and the third sequence comprises N third elements greater than or equal to 0; the i th element in the second sequence corresponds to the i th subcarrier in N subcarriers in a first frequency domain resource, the i th element in the third sequence corresponds to the i th subcarrier in the first frequency domain resource, the i th element in the first sequence is carried on the i th subcarrier in the first frequency domain resource, N is an integer greater than 1, and i is an integer greater than or equal to 1 and less than or equal to N; and the first frequency domain resource comprises M non-overlapping frequency domain subresources, the third sequence comprises M subsequences, the t th subsequence in the M subsequences corresponds to the t th frequency domain subresource in the M frequency domain subresources, the t th subsequence in the M subsequences satisfies the t th relationship in M relationships, M is an integer greater than or equal to 2 and less than or equal to N, and t is an integer greater than or equal to 1 and less than or equal to M.
  11. The method according to claim 10, wherein the i th element in the third sequence is equal to the (N-i+1) th element in the third sequence.
  12. The method according to claim 10 or 11, wherein values of elements in at least one of the M subsequences are all the same.
  13. The method according to any one of claims 10 to 12, wherein M is equal to 3, a start frequency of the t1 th frequency domain subresource in the M frequency domain subresources is less than a start frequency of the t2 th frequency domain subresource in the M frequency domain subresources, t1 is an integer greater than or equal to 1 and less than M, t2 is an integer greater than 1 and less than or equal to M, and t1 is less than t2; the 1 st subsequence in the M subsequences satisfies the 1 st relationship in the M relationships, and the 1 st relationship is: values of elements in the 1 st subsequence are all first values; the 2 nd subsequence in the M subsequences satisfies the 2 nd relationship in the M relationships, and the 2 nd relationship is: values of elements in the 2 nd subsequence are all second values, a value of an element in the 2 nd subsequence satisfies a polynomial function of a square of ( k -( N -1)/2), or a value of an element in the 2 nd subsequence satisfies a functional relationship 1 μ k − N − 1 2 2 + ν + s , wherein 12 ν μ N − 1 N N + 1 > 0.5 , k is a sequence number, in the third sequence, of an element in the 2 nd subsequence, µ is less than 0, v is greater than 0, and s is greater than 0; the 3 rd subsequence in the M subsequences satisfies the 3 rd relationship in the M relationships, and the 3 rd relationship is: values of elements in the 3 rd subsequence are all third values; and the first value and the third value are both greater than the second value.
  14. The method according to any one of claims 10 to 13, wherein M is equal to 5, a start frequency of the t1 th frequency domain subresource in the M frequency domain subresources is less than a start frequency of the t2 th frequency domain subresource in the M frequency domain subresources, t1 is an integer greater than or equal to 1 and less than M, t2 is an integer greater than 1 and less than or equal to M, and t1 is less than t2; the 1 st subsequence in the M subsequences satisfies the 1 st relationship in the M relationships, and the 1 st relationship is: values of elements in the 1 st subsequence are all first values; the 2 nd subsequence in the M subsequences satisfies the 2 nd relationship in the M relationships, and the 2 nd relationship is: values of elements in the 2 nd subsequence are all 1s; the 3 rd subsequence in the M subsequences satisfies the 3 rd relationship in the M relationships, and the 3 rd relationship is: values of elements in the 3 rd subsequence are all second values, a value of an element in the 3 rd subsequence satisfies a polynomial function of a square of ( k -( N -1)/2), or a value of an element in the 3 rd subsequence satisfies a functional relationship 1 μ k − N − 1 2 2 + ν + s , wherein 12 ν μ N − 1 N N + 1 > 0.5 , k is a sequence number, in the third sequence, of an element in the 3 rd subsequence, µ is less than 0, v is greater than 0, and s is greater than 0; the 4 th subsequence in the M subsequences satisfies the 4 th relationship in the M relationships, and the 4 th relationship is: values of elements in the 4 th subsequence are all 1s; the 5 th subsequence in the M subsequences satisfies the 5 th relationship in the M relationships, and the 5 th relationship is: values of elements in the 5 th subsequence are all third values; and the first value and the third value are both greater than 1, and the second value is greater than 0 and less than or equal to 1.
  15. The method according to any one of claims 10 to 13, wherein the 1 st subsequence in the M subsequences satisfies the 1 st relationship in the M relationships, and the 1 st relationship is: the k1 th element in the 1 st subsequence is greater than or equal to the k2 th element in the 1 st subsequence; the 2 nd subsequence in the M subsequences satisfies the 2 nd relationship in the M relationships, and the 2 nd relationship is: the k th element in the 2 nd subsequence is greater than or equal to a smaller value in the k1 th element in the 2 nd subsequence and the k2 th element in the 2 nd subsequence; the 3 rd subsequence in the M subsequences satisfies the 3 rd relationship in the M relationships, and the 3 rd relationship is: the k1 th element in the 3 rd subsequence is less than or equal to the k2 th elements in the 3 rd subsequence; and k, k1, and k2 are all integers greater than or equal to 1 and less than or equal to N, k2 is greater than k1, and k is greater than or equal to k1 and less than or equal to k2.
  16. The method according to claim 13 or 14, wherein the method further comprises: receiving, by the second network device, first information sent by a first network device, wherein the first information indicates parameter information of the third sequence, and the parameter information comprises at least one of the following: the first value, the second value, the third value, µ, v, s, and M.
  17. The method according to any one of claims 10 to 16, wherein the first signal is used for sensing, the first signal is used for sensing and channel measurement, the first signal is used for sensing and channel estimation, or the first signal is used for sensing and data transmission.
  18. A communication method, wherein the method comprises: receiving, by a terminal device, a first signal, wherein the first signal is generated based on a first sequence, and the first sequence is a product of a second sequence and a third sequence, wherein the first sequence comprises N first elements, the second sequence comprises N second elements, the second sequence carries data, and the third sequence comprises N third elements greater than or equal to 0; the i th element in the second sequence corresponds to the i th subcarrier in N subcarriers in a first frequency domain resource, the i th element in the third sequence corresponds to the i th subcarrier in the first frequency domain resource, the i th element in the first sequence is carried on the i th subcarrier in the first frequency domain resource, N is an integer greater than 1, and i is an integer greater than or equal to 1 and less than or equal to N; and the first frequency domain resource comprises M non-overlapping frequency domain subresources, the third sequence comprises M subsequences, the t th subsequence in the M subsequences corresponds to the t th frequency domain subresource in the M frequency domain subresources, the t th subsequence in the M subsequences satisfies the t th relationship in M relationships, M is an integer greater than or equal to 2 and less than or equal to N, and t is an integer greater than or equal to 1 and less than or equal to M.
  19. The method according to claim 18, wherein the i th element in the third sequence is equal to the (N-i+1) th element in the third sequence.
  20. The method according to claim 18 or 19, wherein values of elements in at least one of the M subsequences are all the same.

Description

This application claims priority to Chinese Patent Application No. 202311016823.9, 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 field of communication technologies, and in particular, to a communication method and apparatus. BACKGROUND Integrated sensing and communication is a key technology for a next-generation wireless communication network, aims to integrate two functions of wireless communication and sensing into a same system, and implements sensing functions such as positioning, detection, imaging, and identification of a target by using various propagation characteristics of radio signals, to obtain physical ambient environment information, explore a communication capability, and improve user experience. For example, a network device performs sensing by sending a sensing signal and receiving an echo signal, to obtain information such as location and speed of a target in an environment. The echo signal is a signal generated when the sensing signal is reflected by the target in the environment. A delay of the echo signal relative to the sent sensing signal shows a range from the target, and a Doppler frequency shift of the echo signal relative to the sent sensing signal shows a speed of the target. When the network device needs to communicate with a terminal device and sense a target in the environment, the network device needs to send an integrated sensing and communication signal for communication and sensing. How to design an integrated sensing and communication signal used for both communication and sensing is an urgent problem to be resolved. SUMMARY Embodiments of this application provide a communication method and apparatus, so that not only a root-mean-square bandwidth of an integrated sensing and communication signal can be increased, to improve ranging precision of the integrated sensing and communication signal, but also a lower peak-to-sidelobe ratio of a range spectrum is obtained by sensing by using the integrated sensing and communication signal, to reduce a false alarm probability of sensing. According to a first aspect, an embodiment of this application provides a communication method. The method is applied to a first network device, or a chip or a circuit configured in the first network device, and includes: generating a first signal based on a first sequence, where the first sequence is a product of a second sequence and a third sequence, wherethe first sequence includes N first elements, the second sequence includes N second elements, the second sequence carries data, and the third sequence includes N third elements greater than or equal to 0;the ith element in the second sequence corresponds to the ith subcarrier in N subcarriers in a first frequency domain resource, the ith element in the third sequence corresponds to the ith subcarrier in the first frequency domain resource, the ith element in the first sequence is carried on the ith subcarrier in the first frequency domain resource, N is an integer greater than 1, and i is an integer greater than or equal to 1 and less than or equal to N; andthe first frequency domain resource includes M non-overlapping frequency domain subresources, the third sequence includes M subsequences, the tth subsequence in the M subsequences corresponds to the tth frequency domain subresource in the M frequency domain subresources, the tth subsequence in the M subsequences satisfies the tth relationship in M relationships, M is an integer greater than or equal to 2 and less than or equal to N, and t is an integer greater than or equal to 1 and less than or equal to M; andsending the first signal. The first signal is an integrated sensing and communication signal. The second sequence that carries data is multiplied by the third sequence in a segmented form, to generate the integrated sensing and communication signal. The generated integrated sensing and communication signal may have different properties by designing the third sequence in different forms, to satisfy different sensing and communication requirements. For example, when the third sequence is a sequence in a concave form, a root-mean-square bandwidth of the integrated sensing and communication signal may be increased, to improve ranging precision of the integrated sensing and communication signal. When the third sequence includes a subsequence in a convex form, a lower peak-to-sidelobe ratio of a range spectrum is obtained by sensing by using the integrated sensing and communication signal, to reduce a false alarm probability of sensing. In a possible design, the ith element in the third sequence is equal to the (N-i+1)th element in the third sequence. That is, the third sequence may be a symmetric sequence. In another possible design, values of elements in at least one of the M subsequences are