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CN-122002549-A - Communication method, device, equipment and medium

CN122002549ACN 122002549 ACN122002549 ACN 122002549ACN-122002549-A

Abstract

The embodiment of the application provides a communication method, a device, equipment and a medium, relates to the technical field of satellite communication, and is applied to a TDD satellite communication system to improve the utilization rate of air interface resources. In the application, the star station device can respectively send time slot scheduling information to the terminals in the corresponding wave bits based on the scheduling frame formats of the first wave bit and the second wave bit, wherein in the scheduling frame format, the idle time slots of the first wave bit are the DL time slots and the UL time slots of the second wave bit. Because the idle time slot of the first wave bit can be the DL time slot and the UL time slot of the second wave bit, the star station equipment can carry out scheduling operation on each time slot to the greatest extent, and the aim of improving the utilization rate of air interface resources can be achieved based on the scheduling operation.

Inventors

  • YAN HONG
  • LIU XIANLING
  • JIAO LINGXIAO

Assignees

  • 上海卫星互联网研究院有限公司

Dates

Publication Date
20260508
Application Date
20241106

Claims (13)

  1. 1. A communication method, for use in a star station apparatus in a time division duplex, TDD, satellite communication system, the method comprising: And respectively sending time slot scheduling information to terminals in corresponding wave bits based on scheduling frame formats of the first wave bit and the second wave bit, wherein idle time slots of the first wave bit in the scheduling frame format are downlink DL time slots and uplink UL time slots of the second wave bit.
  2. 2. The method of claim 1, wherein the scheduling frame format is related to a maximum round trip delay, RTT, for a corresponding wave position, the RTT for the wave position being related to a target distance and a speed of light, the target distance being a distance between a coverage point within a cell and the star point device.
  3. 3. The method of claim 1, wherein the scheduling frame format relates to a symbol configuration of a flexible slot.
  4. 4. The method according to claim 1, wherein the method further comprises: and when the interval of the RTT associated with the wave bit changes, sending flexible time slot configuration information to the terminal in the wave bit.
  5. 5. The method of claim 4, wherein the flexible slot configuration information is sent via a radio resource control reconfiguration RRCReconfiguration message or downlink control information DCI.
  6. 6. The method according to claim 1, wherein the method further comprises: And broadcasting public information to terminals in corresponding wave bits, wherein the public information of the first wave bit is broadcast in an upper half frame, and the public information of the second wave bit is broadcast in a lower half frame.
  7. 7. The method according to claim 1, wherein the method further comprises: And sending non-scheduling DL time slot information to the terminals in the corresponding wave positions.
  8. 8. The method of claim 7, wherein the non-scheduled DL slot information is sent via a radio resource control reconfiguration RRCReconfiguration message or downlink control information, DCI.
  9. 9. A communication method for a terminal in a time division duplex, TDD, satellite communication system, the method comprising: Receiving time slot scheduling information of a first wave bit or a second wave bit, wherein in a scheduling frame format of the first wave bit and the second wave bit, an idle time slot of the first wave bit is a downlink DL time slot and an uplink UL time slot of the second wave bit; and carrying out data transmission based on the time slot scheduling information of the first wave bit or the second wave bit.
  10. 10. A communication device comprising means or modules for performing the method according to any of claims 1-8 or means or modules for performing the method according to claim 9.
  11. 11. An electronic device comprising one or more processors configured to perform the method of any one of claims 1-8 or to perform the method of claim 9.
  12. 12. A computer readable storage medium, characterized in that the computer readable storage medium has stored therein a computer program or instructions which, when executed by a communication device, implements the method according to any of claims 1-8 or implements the method according to claim 9.
  13. 13. A computer program product, characterized in that the computer program product, when called by a computer, causes the computer to perform the method according to any one of claims 1-8 or to perform the method according to claim 9.

Description

Communication method, device, equipment and medium Technical Field The present application relates to the field of communications technologies, and in particular, to a communications method, apparatus, device, and medium. Background In a New air-interface (NR) Time division duplex (Time Division Duplex, TDD) system, due to the existence of a spatial propagation delay, a Time transmitted by a base station (Next Generation Node B, gNB) side cannot be aligned with a Time received by a terminal (UE) side, so a Guard Period (GP) is set in a TDD frame structure, the base station does not transmit and receive in the GP, and a GP length is equal to or greater than a Round-Trip Time (RTT) between the base station and the UE. However, when the base station is deployed onto a satellite, the round trip delay between the base station and the UE increases significantly compared to when the base station is deployed on the ground, resulting in a longer GP length. Taking a base station deployed on a low-orbit satellite with an orbit height of 500-600 km, the furthest point of the satellite from a ground coverage area (cell) is 900 km as an example, the round trip delay between the base station and the UE is about 6 ms, the GP accounts for about 12 slots based on the corresponding slots of the subcarrier configured as 30kHz, and the GP slots account for up to 60% in a frame structure with a total number of slots of 20. The high duty ratio of the GP slot greatly reduces the air interface resource utilization. Therefore, how to improve the air interface resource utilization after the base station is deployed on the satellite is a technical problem that needs to be solved at present. Disclosure of Invention The application provides a communication method, a device, equipment and a medium, which are used for improving the utilization rate of air interface resources. In a first aspect, the present application provides a communication method applied to a star station device in a TDD satellite communication system, where the method includes: And respectively sending time slot scheduling information to terminals in corresponding wave bits based on scheduling frame formats of the first wave bit and the second wave bit, wherein idle time slots of the first wave bit in the scheduling frame format are downlink DL time slots and uplink UL time slots of the second wave bit. In one possible implementation, the scheduling frame format is related to a maximum round trip delay RTT of a corresponding wave bit, and RTT of the wave bit is related to a target distance and a speed of light, wherein the target distance is a distance between a coverage point in a cell and the star station device. In one possible implementation, the scheduling frame format is related to a symbol configuration of a flexible slot. In one possible embodiment, the method further comprises: and when the interval of the RTT associated with the wave bit changes, sending flexible time slot configuration information to the terminal in the wave bit. In a possible implementation manner, the flexible timeslot configuration information is sent through a radio resource control reconfiguration RRCReconfiguration message or downlink control information DCI. In one possible embodiment, the method further comprises: And broadcasting public information to terminals in corresponding wave bits, wherein the public information of the first wave bit is broadcast in an upper half frame, and the public information of the second wave bit is broadcast in a lower half frame. In one possible embodiment, the method further comprises: And sending non-scheduling DL time slot information to the terminals in the corresponding wave positions. In a possible implementation manner, the non-scheduled DL slot information is sent through a radio resource control reconfiguration RRCReconfiguration message or downlink control information DCI. In a second aspect, the present application provides a communication method applied to a terminal in a TDD satellite communication system, the method comprising: Receiving time slot scheduling information of a first wave bit or a second wave bit, wherein in a scheduling frame format of the first wave bit and the second wave bit, an idle time slot of the first wave bit is a downlink DL time slot and an uplink UL time slot of the second wave bit; and carrying out data transmission based on the time slot scheduling information of the first wave bit or the second wave bit. In a third aspect, the present application provides a communication device comprising means or modules for performing the method according to any of the first aspects, or means or modules for performing the method according to the second aspect. Wherein when the communication device performs the method according to any of the first aspects, the communication device comprises: The first sending module is used for respectively sending time slot scheduling information to terminals in corresponding wave bits ba