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CN-122002610-A - Communication method and related device

CN122002610ACN 122002610 ACN122002610 ACN 122002610ACN-122002610-A

Abstract

The embodiment of the application provides a communication method and a related device, wherein in the method, terminal equipment firstly receives paging information and then sends a first preamble. The paging message is for indicating a first index to which a first preamble is associated. Based on the above scheme, the terminal device may send the preamble through the first index indicated by the paging message. Or it is understood that the present application proposes to assist random access by paging messages. For example, the paging message indicates the preamble or the related index of the random access channel opportunity (RO) used for transmitting the preamble in advance, so that the probability of collision of the preamble or the RO can be reduced, and the random access efficiency can be improved. The problem of insufficient preamble resources caused by each terminal device using a specific preamble can also be reduced.

Inventors

  • TONG XINYI
  • TANG ZIHAN
  • HUANG HUANG
  • MA MENGYAO

Assignees

  • 华为技术有限公司

Dates

Publication Date
20260508
Application Date
20241108

Claims (20)

  1. 1.A method of communication, the method comprising: Receiving a paging message, wherein the paging message is used for indicating a first index; a first preamble is transmitted, the first preamble being associated with the first index.
  2. 2. The method of claim 1, wherein the first preamble is associated with the first index, and comprises one or more of the following, wherein the index of the first preamble is a subset of the first index, the index of a packet in which the first preamble is located is a subset of the first index, and the index of a packet in which a random access channel opportunity used for transmitting the first preamble is located is a subset of the first index.
  3. 3. The method according to claim 1 or 2, wherein the first index comprises one or more of a preamble index, at least one preamble group index, at least one random access channel occasion group index, the at least one preamble group index comprising an index of a group in which the first preamble is located, the at least one random access channel occasion group index comprising an index of a group in which a random access channel occasion used for transmitting the first preamble is located.
  4. 4. A method according to any one of claims 1 to 3, wherein prior to said receiving a paging message, the method further comprises: Receiving first information, wherein the first information is used for indicating one or more of a plurality of lead code indexes, a plurality of random access channel time indexes, a plurality of lead code group indexes, a lead code index corresponding to each lead code group index, a plurality of random access channel time group indexes and a random access channel time index corresponding to each random access channel time group index, each lead code group index in the plurality of lead code group indexes is associated with a plurality of lead code indexes, and each random access channel time group index in the plurality of random access channel time group indexes is associated with a plurality of random access channel time indexes; the first information and the paging message are used for determining the first preamble and/or a first random access channel opportunity, wherein the first random access channel opportunity is a random access channel opportunity used for transmitting the first preamble.
  5. 5. The method according to claim 4, wherein the first information is specifically used to indicate a plurality of group indexes and a second index associated with each group index, the first index being used to indicate at least one group index of the plurality of group indexes; The packet index is an index of a preamble packet, and the second index is an index indicating a preamble included in the preamble packet, or The group index is an index of a random access channel opportunity group, and the second index is used for indicating an index of a random access channel opportunity included in the random access channel opportunity group, or The packet index includes an index of the preamble packet and an index of the random access channel occasion packet, and the second index is used to indicate an index of a preamble included in the preamble packet and an index of a random access channel occasion included in the random access channel occasion packet.
  6. 6. The method of claim 5, wherein the second index comprises a maximum index and/or a minimum index in a packet associated with the second index.
  7. 7. The method of claim 5 or 6, wherein the first information is further used to indicate a first number, the first number being a number of the plurality of packet indexes.
  8. 8. The method according to any one of claims 5 to 7, wherein the plurality of packet indexes comprises indexes of the plurality of random access channel occasion packets, and wherein the first information is further used for indicating at least one of a grouping rule, a second number, and a third index of a group of the plurality of random access channel occasions; The second number of synchronization signals and random access channel occasions within a physical broadcast channel block SSB period are numbered as a whole, and the third index is used to indicate the order of SSBs in the second number.
  9. 9. The method of claim 8, wherein the grouping rule comprises any of dividing from small to large in a frequency domain, dividing from large to small in the frequency domain, spacing a predetermined frequency domain granularity distribution in the frequency domain, dividing from small to large in a time domain, dividing from large to small in the time domain, spacing a predetermined time domain granularity distribution in the time domain.
  10. 10. The method according to any of claims 1 to 9, wherein the first index is used to indicate a first preamble packet index, the first preamble packet index being associated with at least one preamble, the at least one preamble comprising the first preamble.
  11. 11. The method of any of claims 1-10, wherein the first information is used to indicate the plurality of random access channel occasions, wherein the first index is used to indicate a first random access channel occasion packet associated with at least one random access channel occasion of the plurality of random access channel occasions, wherein the at least one random access channel occasion comprises transmitting the first random access channel occasion.
  12. 12. The method according to any one of claims 1 to 11, wherein the number of the first indexes is a plurality, and the priority order of the plurality of first indexes is related to one or more of the order of the sizes of the plurality of first indexes, the order of the occurrence of the plurality of first indexes in the paging message.
  13. 13. The method according to any of claims 1 to 12, wherein the paging message further comprises an identification of a terminal device, the identification of the terminal device being associated with the first index.
  14. 14. A method of communication, the method comprising: transmitting a paging message, wherein the paging message is used for indicating a first index; A first preamble is received, the first preamble being associated with the first index.
  15. 15. The method of claim 14, wherein the first preamble is associated with the first index, and comprises one or more of the following, wherein the index of the first preamble is a subset of the first index, the index of a packet in which the first preamble is located is a subset of the first index, and the index of a packet in which a random access channel opportunity for transmitting the first preamble is located is a subset of the first index.
  16. 16. The method according to claim 14 or 15, wherein the first index comprises one or more of a preamble index, at least one preamble group index, at least one random access channel occasion group index, the at least one preamble group index comprising an index of a group in which the first preamble is located, the at least one random access channel occasion group index comprising an index of a group in which a random access channel occasion used for transmitting the first preamble is located.
  17. 17. The method according to any one of claims 14 to 16, wherein prior to the sending the paging message, the method further comprises: Transmitting first information, wherein the first information is used for indicating one or more of a plurality of lead code indexes, a plurality of random access channel time indexes, a plurality of lead code group indexes, a lead code index corresponding to each lead code group index, a plurality of random access channel time group indexes and a random access channel time index corresponding to each random access channel time group index, each lead code group index in the plurality of lead code group indexes is associated with a plurality of lead code indexes, and each random access channel time group index in the plurality of random access channel time group indexes is associated with a plurality of random access channel time indexes; the first information and the paging message are used for determining the first preamble and/or a first random access channel opportunity, wherein the first random access channel opportunity is a random access channel opportunity used for transmitting the first preamble.
  18. 18. The method according to claim 17, wherein the first information is specifically used to indicate a plurality of group indexes and a second index associated with each group index, the first index being used to indicate at least one group index of the plurality of group indexes; The packet index is an index of a preamble packet, and the second index is an index indicating a preamble included in the preamble packet, or The group index is an index of a random access channel opportunity group, and the second index is used for indicating an index of a random access channel opportunity included in the random access channel opportunity group, or The packet index includes an index of the preamble packet and an index of the random access channel occasion packet, and the second index is used to indicate an index of a preamble included in the preamble packet and an index of a random access channel occasion included in the random access channel occasion packet.
  19. 19. The method of claim 18, wherein the second index comprises a maximum index and/or a minimum index in a packet associated with the second index.
  20. 20. The method of claim 18 or 19, wherein the first information is further used to indicate a first number, the first number being the number of the plurality of packet indexes.

Description

Communication method and related device Technical Field The present application relates to the field of wireless communications technologies, and in particular, to a communication method and a related device. Background In a communication system, a radio resource control (radioresourcecontrol, RRC) layer may be included in a communication protocol stack of a terminal device and a network device. Also, there are three RRC states for the terminal device, namely an RRC IDLE (rrc_idle) state, an RRC INACTIVE (rrc_inactive) state, and an RRC CONNECTED (rrc_connected) state. The terminal equipment in the RRC connection state establishes RRC connection with the network equipment, and can perform data transmission. The terminal device in the RRC idle state does not establish an RRC connection with the network device. The RRC connection is suspended between the terminal device and the network device in the RRC inactive state, i.e. the RRC connection between the terminal device and the network device is suspended or not available. Or it is understood that the transmission of uplink data cannot be achieved through the RRC connection for the terminal device in the RRC idle state and the terminal device in the RRC inactive state. At present, when the terminal equipment is in an RRC idle state or an RRC inactive state, the terminal equipment can be switched into an RRC connection state through a random access process, so that data transmission is realized. Specifically, during the random access procedure, the terminal device generally randomly selects one of the preambles configured in the broadcast system information block (system information block, SIB) and initiates the random access procedure. However, the existing preamble configuration method cannot meet the requirement of access efficiency. Therefore, exploring a preamble configuration manner to increase access efficiency is a technical problem to be solved. Disclosure of Invention The embodiment of the application provides a communication method and a related device, which not only can improve the random access efficiency, but also can reduce the problem of insufficient preamble resources caused by using a specific preamble by each terminal device through paging information to assist the random access. The first aspect of the present application provides a communication method, which is performed by a terminal device, or by a part of components in the terminal device (such as a processor, a chip or a system-on-chip, etc.), or which may be implemented by a logic module or software capable of implementing all or part of the functions of the terminal device. In the first aspect and its possible implementation manners, the method is described as an example performed by the terminal device. In the method, a terminal device receives a paging message and then transmits a first preamble. The paging message is for indicating a first index, the first preamble being associated with the first index. Wherein the first preamble is associated with the first index, it is understood that the terminal device transmits the first preamble according to the paging message. Or it is understood that transmitting the first preamble is associated with the first index. For example, a first index indicated by the paging message is used to determine the first preamble. As another example, the first index indicated by the paging message is used to determine a random ACCESS CHANNEL occalation (RO) for transmitting the preamble. For another example, the first index indicated by the paging message is used to determine not only the first preamble but also the RO used to transmit the first preamble. The preamble and the RO may be collectively referred to as a random access resource. Based on the above scheme, the terminal device may send the preamble through the first index indicated by the paging message. Or it is understood that the present application proposes to assist random access by paging messages. For example, the paging message indicates the preamble or the correlation index of the RO used for transmitting the preamble in advance, so that the probability of preamble collision can be reduced, and the random access efficiency can be improved. The problem of insufficient preamble resources caused by each terminal device using a specific preamble can also be reduced. Optionally, in a possible implementation manner of the first aspect, the first preamble is related to the first index, and includes one or more of the following, where an index of the first preamble is a subset of the first index, an index of a packet in which the first preamble is located is a subset of the first index, and an index of a packet in which a random access channel opportunity used for transmitting the first preamble is located is a subset of the first index. In this possible implementation manner, on the one hand, the first preamble may be used to determine the first preamble, or to determine the RO used for transm