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CN-122002612-A - Communication method and device

CN122002612ACN 122002612 ACN122002612 ACN 122002612ACN-122002612-A

Abstract

A communication method and device can be applied to the satellite communication field, such as NTN. The method comprises the steps that a terminal device receives first information, the first information is used for indicating available random access resources and a random access sequence format, the random access sequence format is used for indicating continuous symbol groups, the continuous symbol groups represent G symbol groups which need continuous transmission of the random access sequence, G is a positive integer, the terminal device sends the random access sequence on at least one first random access resource in the available random access resources, the first random access resource is continuous resource, and the length of the first random access resource is not smaller than that of one continuous symbol group. By the technical scheme provided by the application, the transmission performance of the random access sequence can be ensured.

Inventors

  • CHEN YING
  • SHI PENGCHENG
  • ZHANG JIAYIN

Assignees

  • 华为技术有限公司

Dates

Publication Date
20260508
Application Date
20241108

Claims (20)

  1. 1. A method of communication, comprising: the terminal device receives first information, wherein the first information is used for indicating available random access resources and a random access sequence format, the random access sequence format is used for indicating continuous symbol groups, the continuous symbol groups represent G symbol groups which need continuous transmission of a random access sequence, and G is a positive integer; the terminal device sends the random access sequence on at least one first random access resource in the available random access resources, wherein the first random access resource is a continuous resource, and the length of the first random access resource is not less than the length of one continuous symbol group.
  2. 2. The method of claim 1, wherein the first information is further used to indicate a number R of repeated transmissions of the random access sequence, the number R of repeated transmissions of the random access sequence comprising N groups of the consecutive symbol groups; The terminal device transmitting the random access sequence on at least one first random access resource of the available random access resources, comprising: When the length of the first random access resource is greater than the length of the K groups of continuous symbol groups and less than the length of the k+1 groups of continuous symbol groups, the terminal device transmits the first K groups of continuous symbol groups of the N groups of continuous symbol groups on the initial first random access resource, and the terminal device processes the last N-K groups of continuous symbol groups of the N groups of continuous symbol groups according to a first mode; Wherein R, N and K are positive integers, K is smaller than N, and the first mode comprises: Discarding the k+1st one of the N groups of the consecutive symbol groups; And when the N-K is larger than 1, transmitting the subsequent N-K-1 groups of the continuous symbol groups in the N groups of the continuous symbol groups on a first random access resource after the initial first random access resource.
  3. 3. The method of claim 2, wherein the transmitting the subsequent N-K-1 ones of the N groups of the consecutive symbol groups on the first random access resource subsequent to the initial first random access resource comprises: And when the N-K-1 is larger than the K, transmitting the (K+2) -th to (2K+1) -th continuous symbol groups in the N groups of the continuous symbol groups on a first random access resource next to the initial first random access resource, and discarding the 2K+2-th continuous symbol group in the N groups of the continuous symbol groups.
  4. 4. The method of claim 1, wherein the first information is further used to indicate a number R of repeated transmissions of the random access sequence, the number R of repeated transmissions of the random access sequence comprising N groups of the consecutive symbol groups; The terminal device transmitting the random access sequence on at least one first random access resource of the available random access resources, comprising: when the length of the first random access resource is greater than the length of the K groups of continuous symbol groups and less than the length of the k+1 groups of continuous symbol groups, the terminal device transmits the first K groups of continuous symbol groups of the N groups of continuous symbol groups on the initial first random access resource, and the terminal device processes the last N-K groups of continuous symbol groups of the N groups of continuous symbol groups according to a second mode; wherein R, N and K are positive integers, K is smaller than N, and the second mode comprises: Discarding the subsequent N-K groups of the consecutive symbol groups of the N groups of the consecutive symbol groups.
  5. 5. The method of claim 1, wherein the first information is further used to indicate a number R of repeated transmissions of the random access sequence, the number R of repeated transmissions of the random access sequence comprising N groups of the consecutive symbol groups; The terminal device transmitting the random access sequence on at least one first random access resource of the available random access resources, comprising: When the length of the first random access resource is greater than the length of the K groups of continuous symbol groups and less than the length of the k+1 groups of continuous symbol groups, the terminal device transmits the first K groups of continuous symbol groups of the N groups of continuous symbol groups on the initial first random access resource, and the terminal device processes the last N-K groups of continuous symbol groups of the N groups of continuous symbol groups according to a third mode; Wherein R, N and K are positive integers, K is smaller than N, and the third mode comprises: And transmitting the subsequent N-K groups of the continuous symbol groups in the N groups of the continuous symbol groups on a first random access resource after the initial first random access resource.
  6. 6. The method of claim 5, wherein the transmitting the subsequent N-K ones of the N groups of the consecutive symbol groups on the first random access resource subsequent to the starting first random access resource comprises: In case said N-K is smaller than or equal to said K, said terminal device transmits the subsequent N-K of said N groups of said consecutive symbol groups on the next one of said first random access resources of said initial first random access resource, or, And when the N-K is larger than the K, the terminal device sends the (K+2) -th to (2K+1) -th continuous symbol groups in the N groups of continuous symbol groups on a first random access resource next to the initial first random access resource, and sends the (K+1) -th continuous symbol group in the N groups of continuous symbol groups on a first random access resource after the next first random access resource.
  7. 7. The method of claim 1, wherein the first information is further used to indicate a number R of repeated transmissions of the random access sequence, the number R of repeated transmissions of the random access sequence comprising N groups of the consecutive symbol groups; The terminal device transmitting the random access sequence on at least one first random access resource of the available random access resources, comprising: When the length of the first random access resource is greater than the length of the K groups of the continuous symbol groups and less than the length of the k+1 groups of the continuous symbol groups, the terminal device transmits the first K groups of the continuous symbol groups of the N groups of the continuous symbol groups on the initial first random access resource, and the terminal device processes the last N-K groups of the continuous symbol groups of the N groups of the continuous symbol groups according to a fourth aspect; wherein R, N and K are positive integers, K is smaller than N, the fourth mode comprises: Transmitting a first part of the k+1th group of the continuous symbol groups in the N groups of the continuous symbol groups on the initial first random access resource, wherein the first part occupies resources except for resources occupied by the first K groups of the continuous symbol groups in the initial first random access resource; And when the N-K is larger than 1, transmitting the subsequent N-K-1 groups of the continuous symbol groups of the random access sequence on a first random access resource after the initial first random access resource.
  8. 8. The method according to claim 1, wherein the method further comprises: the terminal device receives second information, wherein the second information is used for indicating the minimum number of the continuous symbol groups needing to be transmitted; The terminal device transmitting the random access sequence on at least one first random access resource of the available random access resources, comprising: the terminal device transmits the minimum number of consecutive symbol groups on the at least one first random access resource.
  9. 9. The method according to claim 1, wherein the method further comprises: the terminal device receives second information, wherein the second information is used for indicating the minimum number of the continuous symbol groups needing to be transmitted; The terminal device transmitting the random access sequence on at least one first random access resource of the available random access resources, comprising: The terminal device transmits the continuous symbol groups on the at least one first random access resource until the number of groups of the continuous symbol groups which have been transmitted is greater than or equal to the minimum number of groups, and the length of the remaining resources of the first random access resource currently used for transmitting the continuous symbol groups is smaller than the length of the continuous symbol groups.
  10. 10. The method according to any one of claims 1 to 9, further comprising: The terminal device receives third information indicating the first mode, the second mode, the third mode, or the fourth mode.
  11. 11. A method of communication, comprising: The network device sends first information, wherein the first information is used for indicating available random access resources and a random access sequence format, the random access sequence format is used for indicating continuous symbol groups, the continuous symbol groups represent G symbol groups which need continuous transmission of a random access sequence, and G is a positive integer; The network device receives the random access sequence on at least one first random access resource in the available random access resources, wherein the first random access resource is a continuous resource, and the length of the first random access resource is not less than the length of one continuous symbol group.
  12. 12. The method of claim 11, wherein the first information is further used to indicate a number R of repeated transmissions of the random access sequence, the number R of repeated transmissions of the random access sequence comprising N groups of the consecutive symbol groups; The network device receiving the random access sequence on at least one first random access resource of the available random access resources, comprising: When the length of the first random access resource is greater than the length of K groups of the consecutive symbol groups and less than the length of k+1 groups of the consecutive symbol groups, the network device receives the first K groups of the consecutive symbol groups of the N groups of the consecutive symbol groups on the initial first random access resource, the network device processing the last N-K groups of the consecutive symbol groups of the N groups of the consecutive symbol groups according to a first manner; Wherein R, N and K are positive integers, K is smaller than N, and the first mode comprises: not receiving the k+1th group of the consecutive symbol groups of the N groups of the consecutive symbol groups; and when the N-K is greater than 1, receiving a subsequent N-K-1 group of the continuous symbol groups of the random access sequence on a first random access resource subsequent to the initial first random access resource.
  13. 13. The method of claim 12, wherein the receiving the subsequent N-K-1 groups of the consecutive symbol groups of the random access sequence on the first random access resource subsequent to the initial first random access resource comprises: And when the N-K-1 is larger than the K, receiving the (K+2) -th group to (2K+1) -th group of the continuous symbol groups in the N groups of the continuous symbol groups on a first random access resource next to the initial first random access resource, and not receiving the 2K+2-th group of the continuous symbol groups in the N groups of the continuous symbol groups.
  14. 14. The method of claim 11, wherein the first information is further used to indicate a number R of repeated transmissions of the random access sequence, the number R of repeated transmissions of the random access sequence comprising N groups of the consecutive symbol groups; The network device receiving the random access sequence on at least one first random access resource of the available random access resources, comprising: When the length of the first random access resource is greater than the length of K groups of the consecutive symbol groups and less than the length of k+1 groups of the consecutive symbol groups, the network device receives the first K groups of the consecutive symbol groups of the N groups of the consecutive symbol groups on the initial first random access resource, the network device processing the last N-K groups of the consecutive symbol groups of the N groups of the consecutive symbol groups according to a second manner; wherein R, N and K are positive integers, K is smaller than N, and the second mode comprises: the subsequent N-K of the N groups of the consecutive symbol groups are not received.
  15. 15. The method of claim 11, wherein the first information is further used to indicate a number R of repeated transmissions of the random access sequence, the number R of repeated transmissions of the random access sequence comprising N groups of the consecutive symbol groups; The network device receiving the random access sequence on at least one first random access resource of the available random access resources, comprising: When the length of the first random access resource is greater than the length of K groups of the continuous symbol groups and less than the length of k+1 groups of the continuous symbol groups, the network device receives the first K groups of the continuous symbol groups of the N groups of the continuous symbol groups on the initial first random access resource, and the network device processes the last N-K groups of the continuous symbol groups of the N groups of the continuous symbol groups according to a third mode; Wherein R, N and K are positive integers, K is smaller than N, and the third mode comprises: And receiving a subsequent N-K group of the consecutive symbol groups of the N groups of the consecutive symbol groups on a first random access resource subsequent to the initial first random access resource.
  16. 16. The method of claim 15, wherein the receiving the subsequent N-K ones of the N groups of the consecutive symbol groups on the first random access resource subsequent to the starting first random access resource comprises: Receiving a subsequent N-K group of said consecutive symbol groups of said N groups of said consecutive symbol groups on a next one of said first random access resources of said starting first random access resource, if said N-K is less than or equal to said K, or, And when the N-K is larger than the K, receiving the K+2nd group to 2K+1th group of the continuous symbol groups in the N groups on a next first random access resource of the initial first random access resource, and receiving the K+1th group of the continuous symbol groups in the N groups on a first random access resource after the next first random access resource.
  17. 17. The method of claim 11, wherein the first information is further used to indicate a number R of repeated transmissions of the random access sequence, the number R of repeated transmissions of the random access sequence comprising N groups of the consecutive symbol groups; The network device receiving the random access sequence on at least one first random access resource of the available random access resources, comprising: When the length of the first random access resource is greater than the length of K groups of the consecutive symbol groups and less than the length of k+1 groups of the consecutive symbol groups, the network device receives a first K groups of the consecutive symbol groups of the N groups of the consecutive symbol groups on a starting first random access resource, the network device processing a subsequent N-K groups of the consecutive symbol groups of the N groups of the consecutive symbol groups according to a fourth manner; wherein R, N and K are positive integers, K is smaller than N, the fourth mode comprises: Receiving a first part of the K+1st group of the continuous symbol groups in the N groups of the continuous symbol groups on the initial first random access resource, wherein the first part occupies resources except for resources occupied by the first K groups of the continuous symbol groups in the initial first random access resource; and when the N-K is greater than 1, receiving a subsequent N-K-1 group of the continuous symbol groups of the random access sequence on a first random access resource subsequent to the initial first random access resource.
  18. 18. The method of claim 11, wherein the method further comprises: the network device sends second information, wherein the second information is used for indicating the minimum group number of the continuous symbol groups needing to be transmitted; The network device receiving the random access sequence on at least one first random access resource of the available random access resources, comprising: the network device receives the minimum number of consecutive symbol groups on the at least one first random access resource.
  19. 19. The method of claim 18, wherein the method further comprises: the network device sends second information, wherein the second information is used for indicating the minimum group number of the continuous symbol groups needing to be transmitted; The network device receiving the random access sequence on at least one first random access resource of the available random access resources, comprising: The network device receives the consecutive symbol groups on the at least one first random access resource until the number of groups of consecutive symbol groups that have been received is greater than or equal to the minimum number of groups, and a remaining resource length of a first random access resource currently used to receive the consecutive symbol groups is less than a length of the consecutive symbol groups.
  20. 20. The method according to any one of claims 11 to 19, further comprising: The network device transmits third information indicating the first mode, the second mode, the third mode, or the fourth mode.

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 With the development of information technology, more urgent demands are placed on the efficiency, mobility, diversity and the like of communication. Currently, non-terrestrial networks (non-TERRESTRIAL NETWORK, NTN), such as satellite communications, play an irreplaceable role in some important fields, such as space communications, aeronautical communications, maritime communications, military communications, etc. Compared with a ground network, the non-ground network can realize wide area and even global coverage by using high, medium and low orbit satellites, and can provide indiscriminate communication services for global users. The non-ground network communication system and the ground network communication system can be mutually integrated to make up for the advantages and the disadvantages, so as to jointly form a global seamless-coverage sea, land, air and sky integrated comprehensive communication network, thereby meeting various service demands of users and being an important direction for future communication development. The frame structure related to the non-ground network is different from the frame structure used in the existing standard, and how to guarantee the transmission performance of the random access sequence under the new frame structure is a technical problem to be solved. Disclosure of Invention The application provides a communication method and a communication device, which can ensure the transmission performance of a random access sequence. In a first aspect, the present application provides a communication method, which may be applied to a terminal device, where the terminal device may be a terminal as a final product (final product), may be a component (component) or a module (module) having a terminal function, may be a circuit or a chip (such as a modem) chip, also called a baseband (baseband) chip, or a system on chip (SoC) chip or a system-in-a-chip (SYSTEMIN PACKAGE) chip, a system on chip or a processor) that is capable of being applied to a circuit or a chip (such as a modem) chip) in the terminal and that is responsible for a communication function, or may be a logic node, a logic module or software that is capable of implementing all or part of the terminal function. The method comprises the following steps: The terminal device receives first information, wherein the first information is used for indicating available random access resources and a random access sequence format, the random access sequence format is used for indicating continuous symbol groups, the continuous symbol groups represent G symbol groups of which the random access sequence needs continuous transmission, and G is a positive integer; The terminal device transmits a random access sequence on at least one first random access resource among available random access resources, the first random access resource being a continuous resource, the length of the first random access resource being not less than the length of one continuous symbol group. Wherein the available random access resources refer to resources for random access or resources for transmission of random access sequences. The random access sequence format refers to a format of a random access sequence to be transmitted, and can be used to determine related information of the random access sequence to be transmitted, such as a length of a continuous symbol group, a group number of the continuous symbol group included in one random access sequence, and the like. A first random access resource has a length not smaller than the length of a consecutive symbol group, i.e. a first random access resource is capable of transmitting at least one consecutive symbol group. The consecutive symbol groups may also be referred to as G symbol groups or G symbol groups. Optionally, the period of the first random access resource is associated with a frame period, and one first random access resource is included in one frame period. Accordingly, the at least one first random access resource is located within at least one frame period. For example, when the at least one first random access resource includes a plurality of first random access resources, the plurality of first random access resources are located in different frame periods. Illustratively, one frame period includes consecutive downlink resources, consecutive guard band resources, and consecutive uplink resources in sequence. In particular, the first random access resource may be included in an uplink resource that is continuous in a frame period, and there are downlink resources and guard band resources between the first random access resources in different frame periods. By the method, the terminal device sends the random access sequence on at least one first random access resource, each first random a