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CN-122001536-A - Communication method and device

CN122001536ACN 122001536 ACN122001536 ACN 122001536ACN-122001536-A

Abstract

The application provides a communication method and a device, and relates to the technical field of communication. In the method, a transmitting end determines a first resource corresponding to a first PDCCH and a second resource corresponding to M second PDCCHs, wherein the M second PDCCHs are retransmission of the first PDCCH, the first resource and the second resource are associated with each other, M is a positive integer, and the first PDCCH and the M second PDCCHs are transmitted. In this way, the receiving end can receive the first PDCCH and the M second PDCCHs according to the association relation between the first resource and the second resource, so that the receiving end is prevented from carrying out frequent blind detection, the capability of the receiving end for receiving downlink messages is enhanced, the transmission efficiency is improved, the energy consumption of the receiving end is saved, and the coverage capability of a downlink is further improved.

Inventors

  • LI CHAO

Assignees

  • 华为技术有限公司

Dates

Publication Date
20260508
Application Date
20250403
Priority Date
20241108

Claims (20)

  1. 1.A method of repeating transmissions, the method comprising: Determining a first resource corresponding to a first PDCCH and a second resource corresponding to M second PDCCHs, wherein the M second PDCCHs are retransmission of the first PDCCH, the first resource and the second resource are associated with each other, and the M is a positive integer; and sending the first PDCCH and the M second PDCCHs.
  2. 2. The method according to claim 1, wherein the method further comprises: and sending Downlink Control Information (DCI) according to the first PDCCH and the M second PDCCHs, wherein the DCI is borne by the PDCCHs and the M second PDCCHs.
  3. 3. A method of repeating transmissions, the method comprising: Determining a first resource corresponding to a first PDCCH and a second resource corresponding to M second PDCCHs, wherein the M second PDCCHs are retransmission of the first PDCCH, the first resource and the second resource are associated with each other, and the M is a positive integer; And receiving the first PDCCH and the M second PDCCHs according to the first resource and the second resource.
  4. 4. A method according to claim 3, characterized in that the method further comprises: And acquiring Downlink Control Information (DCI) according to the first PDCCH and the M second PDCCHs, wherein the DCI is borne on the PDCCHs and the M second PDCCHs.
  5. 5. The method of any of claims 1-4, wherein the first resource comprises a first time domain resource and the second resource comprises a second time domain resource, the first resource and the second resource being interrelated comprising: the second time domain resource is determined from the first time domain resource and a first offset value.
  6. 6. The method of claim 5, wherein the first offset value is predefined or signaled.
  7. 7. The method of any of claims 1-6, wherein the first resource comprises a first frequency domain resource and the second resource comprises a second frequency domain resource, the first resource and the second resource being interrelated comprising one or more of: the second frequency domain resource is the same size as the first frequency domain resource or, And the position of the second frequency domain resource has a corresponding relation with the position of the first frequency domain resource.
  8. 8. The method of claim 7, wherein the size of the second frequency domain resource being the same as the size of the first frequency domain resource comprises: The first frequency domain resource and the second frequency domain resource have the same aggregation level.
  9. 9. The method of claim 7 or 8, wherein the location of the second frequency domain resource corresponds to the location of the first frequency domain resource comprises: The first frequency domain resource and the second frequency domain resource have the same control resource element index.
  10. 10. The method of any of claims 1-9, wherein the first PDCCH schedules N1 transmissions of a first message in a first period, the M second PDCCHs schedule N2 transmissions of the first message in the first period, and the N1, N2 are positive integers.
  11. 11. The method according to any one of claims 1-10, wherein the value of M is 1, the value of N1 is 1, and the value of N2 is 1.
  12. 12. The method of claim 11, wherein the first PDCCH is located in a subzone element n 0 , the second PDCCH is located in a subzone element n 1 , or The first PDCCH is located in a sub-domain unit n k , and the second PDCCH is located in a sub-domain unit n k+1 .
  13. 13. The method according to claim 11, characterized in that The first PDCCH is located in a sub-domain unit n 0 , the second PDCCH is located in a sub-domain unit n k , or The first PDCCH is located in a sub-domain unit n 1 , and the second PDCCH is located in a sub-domain unit n k+1 .
  14. 14. The method of claim 12, wherein the k is predefined or indicated by a synchronization signal block.
  15. 15. The method according to any one of claims 1-10, wherein the value of M is 2, the value of N1 is 1, and the value of N2 is 2.
  16. 16. The method of claim 15, wherein the step of determining the position of the probe is performed, The first PDCCH is located in a sub-field unit N 0 , N1 transmissions of the first message in a first period are located in sub-field units N 0 and N k , respectively, or The second PDCCH is located in a sub-field unit N 1 , and N1 transmissions of the first message in the first period are located in sub-field units N 1 and N k+1 , respectively.
  17. 17. The method of claim 15, wherein the step of determining the position of the probe is performed, The first PDCCH is located in a sub-field unit N 0 , N1 transmissions of the first message in a first period are located in sub-field units N 0 and N 1 , respectively, or The second PDCCH is located in a sub-field unit N k , and N1 transmissions of the first message in the first period are located in sub-field units N k and N k+1 , respectively.
  18. 18. The method according to any one of claims 12-17, wherein n 0 satisfies the following condition: Wherein N 0 or N 0 +1 represents a sub-field unit where a downlink common signal is located, i represents a synchronization signal block index, O and M are transmission parameters indicated by PBCH, N frame,μ represents the number of sub-field resources in a radio frame, and μ represents a subcarrier spacing SCS.
  19. 19. The method according to any of claims 12-17, characterized in that the method comprises that k is predefined, indicated by a synchronization signal block or indicated by downlink control information, wherein the downlink control information indicates being carried on the first PDCCH and/or the second PDCCH.
  20. 20. The method according to any one of claims 10 to 19, wherein, The frequency domain locations of the N1 transmissions of the first message in the first period are the same, and/or, The frequency domain positions of the N2 transmissions of the first message in the first period are the same.

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 communication technology, in order to support wider communication service coverage, a communication mode, for example, a non-terrestrial network (non terrestrial network, NTN), has a wide coverage range, a long communication distance, and a large flexibility, is not affected by geographic environments, climate conditions, and natural disasters, and has been widely applied to the fields of communication services of satellite direct-connected terminals, aviation communication, maritime communication, and the like. However, since the transmission distance from the satellite to the terminal on the ground in the NTN communication scenario is too far, the downlink coverage from the satellite to the terminal cannot generally meet the service requirement, and how to improve the coverage capability of the downlink in the satellite visible area is still an unresolved problem. Disclosure of Invention The application provides a communication method and a communication device, which further improve the coverage capacity of a downlink in a communication network by improving the transmission performance of the downlink in a system and improving the efficiency of a terminal in the coverage area of the downlink for receiving the downlink. In a first aspect, a communication method is provided, which may be performed by an apparatus. The apparatus may be a device (such as a terminal device, and also a network device), or may be a component of a device (such as a chip or a system-on-a-chip or a circuit), which is not limited by the present application. The method can include the steps of determining a first RV of a first message and M second RVs of the first message, wherein the first message is located in a synchronous signal period, M is a positive integer, the M second RVs are determined according to the first RV or indicated by signaling, and sending the first RV of the first message and the M second RVs of the first message in the synchronous signal period. Based on the above technical solution, the transmitting end may determine the first RV and the M second RVs of the first message, and transmit the first RV and the M second RVs of the first message in the synchronization signal period. In this way, the retransmission of the first message is realized by transmitting M second RVs of the first message for multiple times in the period of the synchronous signal, and then the second RV determined according to the first RV or the second RV indicated by the signaling can be combined with the first RV, and compared with the first RV, the first message is transmitted once in the period of the synchronous signal, the method and the device can optimize the transmission effect of the first message, realize the performance gain of repeatedly transmitting the first message, thereby improving the transmission performance of a downlink channel in a communication system, enhancing the capability of a receiving end for receiving the downlink message, and further improving the coverage capability of a downlink. With reference to the first aspect, in some implementations of the first aspect, the method further includes sending first indication information, where the first indication information indicates a value of the first RV, and the first indication information is carried on a common physical downlink control channel (physical downlink control channel, PDCCH). Based on the above technical solution, the transmitting end may indicate the value of the first RV of the transmitted first message through the first indication information. Thus, the receiving end can determine the first RV corresponding to the received first message through the first indication information. With reference to the first aspect, in some implementations of the first aspect, the common PDCCH for transmitting the first indication information includes one or more of a first type PDCCH for indicating a system information block SIB, a second type PDCCH for transmitting a random access response, or a contention resolution message, or a third type PDCCH for transmitting a paging message. Optionally, the public PDCCH comprises one or more of a first type PDCCH, a second type PDCCH or a third type PDCCH, wherein the first type PDCCH is used for sending a system information block SIB, the second type PDCCH is used for sending a random access response or a contention resolution message, and the third type PDCCH is used for sending a paging message. Based on the above technical solution, the transmitting end may send the first indication information through the above multiple types of PDCCHs. In this way, when SIB, random access response, contention resolution message, or paging message is transmitted, the first indication information may be transmitted for th