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CN-122001520-A - Modulation coding mode adjustment method, spatial node and device

CN122001520ACN 122001520 ACN122001520 ACN 122001520ACN-122001520-A

Abstract

The embodiment of the application provides a modulation and coding mode adjustment method, a space node and a device, which relate to the technical field of space communication and are applied to the space node, wherein the method comprises the steps of sending a TB (transport block) to a terminal through a first HARQ (hybrid automatic repeat request) process; the method comprises the steps of receiving an RLC status report sent by a terminal aiming at a received first RLC SDU unit, adjusting an MCS closed-loop order corresponding to a first HARQ process according to a receiving result of the first RLC SDU unit contained in the RLC status report, wherein the receiving result indicates whether the terminal successfully receives the first RLC SDU unit or not, and adjusting a space node based on a modulation coding mode of communication between the first HARQ process and the terminal based on the adjusted MCS closed-loop order. By applying the scheme provided by the embodiment of the application, the modulation coding mode of communication between the space node and the terminal can be adjusted in the scene of disabling the HARQ feedback of the terminal.

Inventors

  • HE GUANGJUN
  • LIU JIA
  • XU YUNSHENG

Assignees

  • 重庆星网网络系统研究院有限公司

Dates

Publication Date
20260508
Application Date
20241104

Claims (12)

  1. 1. A modulation and coding scheme adjustment method, applied to a spatial node, the method comprising: Transmitting a Transport Block (TB) to a terminal through a first hybrid automatic repeat request (HARQ) process, wherein the TB comprises a first radio link layer control (RLC) Service Data Unit (SDU); receiving an RLC status report sent by the terminal for the received first RLC SDU unit; According to a receiving result of a first RLC SDU unit contained in the RLC status report, adjusting a Modulation Coding Scheme (MCS) closed loop order corresponding to the first HARQ process, wherein the receiving result indicates whether the terminal successfully receives the first RLC SDU unit; And adjusting a modulation coding mode of the space node based on the communication between the first HARQ process and the terminal based on the adjusted MCS closed loop order.
  2. 2. The method of claim 1, wherein the adjusting the MCS closed-loop order corresponding to the first HARQ process according to the received result of the first RLC SDU unit contained in the RLC status report comprises: according to the receiving result of the first RLC SDU unit contained in the RLC status report, adjusting the current MCS adjustment quantity of the first HARQ process; And calculating the sum of the MCS initial order corresponding to the first HARQ process and the current MCS adjustment quantity to obtain the MCS closed-loop order corresponding to the first HARQ process.
  3. 3. The method of claim 2, wherein adjusting the current MCS adjustment for the first HARQ process based on the received result for the first RLC SDU unit contained in the RLC status report comprises: If the receiving result contained in the RLC status report indicates that the terminal successfully receives the first RLC SDU unit, the current MCS adjustment of the first HARQ process is increased by a first step size; and if the receiving result contained in the RLC status report indicates that the terminal does not successfully receive the first RLC SDU unit, reducing the current MCS adjustment quantity of the first HARQ process by a second step length.
  4. 4. The method of claim 3, wherein the first step size, the second step size, and a predetermined bit error rate are in accordance with a predetermined numerical relationship.
  5. 5. The method of claim 2, wherein the initial MCS level for the first HARQ process is calculated by: Obtaining a channel quality value between the spatial node and the terminal, wherein the channel quality value represents a first spectral efficiency of the terminal; And determining the MCS order corresponding to the first spectrum efficiency as the MCS initial order corresponding to the first HARQ process based on a mapping relation between the preset spectrum efficiency and the MCS order.
  6. 6. The method of claim 2, wherein initial values of MCS adjustment amounts for different HARQ processes corresponding to the terminal are different.
  7. 7. The method according to any one of claims 1-6, further comprising: Respectively counting historical receiving results of the terminal in the process of communication between the space node and the terminal based on different first modes, wherein the historical receiving results are contained in a historical RLC state report sent by the terminal, and each first mode is a modulation coding mode corresponding to an MCS closed loop order; and respectively calculating the scheduling satisfaction degree corresponding to each MCS closed-loop order based on the historical receiving result, wherein the scheduling satisfaction degree corresponding to each MCS closed-loop order represents the communication quality of the terminal for communication based on the first mode corresponding to the MCS closed-loop order.
  8. 8. The method of claim 7, wherein the adjusting the modulation and coding scheme of the spatial node based on the communication between the first HARQ process and the terminal based on the adjusted MCS closed-loop order comprises: judging whether the MCS closed-loop order corresponding to the first HARQ process is adjusted to the current adjusted MCS closed-loop order for the first time in a preset period; if the current MCS closed-loop order is not adjusted to be the current MCS closed-loop order for the first time, judging whether the scheduling satisfaction corresponding to the current MCS closed-loop order after adjustment is greater than a preset threshold; If the first adjustment is the current adjusted MCS closed-loop order or the scheduling satisfaction corresponding to the current adjusted MCS closed-loop order is greater than a preset threshold, adjusting the space node to a second mode based on the modulation coding mode of the communication between the first HARQ process and the terminal, wherein the second mode is the modulation coding mode corresponding to the current adjusted MCS closed-loop order; If the investigation satisfaction is not greater than the preset threshold, the third step length is adjusted downwards on the basis of the current adjusted MCS closed-loop order, and the step of judging whether the MCS closed-loop order corresponding to the first HARQ process is adjusted to the current adjusted MCS closed-loop order for the first time in the preset period is executed.
  9. 9. The method according to any of claims 1-6, wherein the first RLC SDU unit is a complete RLC SDU or RLC SDU fragment.
  10. 10. A modulation and coding scheme adjustment apparatus for use in a spatial node, the apparatus comprising: an information sending module, configured to send a transport block TB to a terminal through a first hybrid automatic repeat request HARQ process, where the TB includes a first radio link layer control RLC service data unit SDU unit; a report receiving module, configured to receive an RLC status report sent by the terminal for the received first RLC SDU unit; The order adjustment module is configured to adjust a closed loop order of a modulation and coding scheme MCS corresponding to the first HARQ process according to a receiving result of a first RLC SDU unit included in the RLC status report, where the receiving result indicates whether the terminal successfully receives the received first RLC SDU unit; and the modulation coding mode adjustment module is used for adjusting the modulation coding mode of the space node based on the communication between the first HARQ process and the terminal based on the adjusted MCS closed-loop order.
  11. 11. The space node is characterized by comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory are communicated with each other through the communication bus; A memory for storing a computer program; a processor for carrying out the method steps of any one of claims 1-9 when executing a program stored on a memory.
  12. 12. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored therein a computer program which, when executed by a processor, implements the method steps of any of claims 1-9.

Description

Modulation coding mode adjustment method, spatial node and device Technical Field The present application relates to the field of spatial communications technologies, and in particular, to a modulation and coding method, a spatial node, and an apparatus. Background The wireless communication environment is complex and changeable, and the change of the wireless communication environment can have great influence on the signal transmission effect of the wireless link. To cope with the above, AMC (Adaptive Modulation and Coding, adaptive modulation coding) technique may be employed. The AMC technology is a link self-adapting technology, and its basic principle is that under the condition of a certain transmitting power of a signal transmitting end, the modulation mode and the coding mode of wireless link transmission are adjusted to match the change of wireless link communication quality caused by the change of wireless communication environment, thereby improving the transmission efficiency of the wireless link and guaranteeing the signal propagation quality of the wireless link. Currently, in the AMC scheme of the 5G (5 th Generation Mobile Communication Technology, fifth generation mobile communication technology) NR (New Radio) system for terrestrial wireless communication, a space node may provide a communication service for a terminal based on a modulation coding mode corresponding to a set MCS (Modulation and Coding Scheme, modulation coding scheme) order. And the terminal reports HARQ (Hybrid Automatic Repeat Request ) feedback to the spatial node in the communication process, where the HARQ feedback indicates whether the terminal successfully receives the signal reception result. The failure of the terminal to receive may be caused by poor communication quality of the wireless link between the spatial node and the terminal, whereas the successful reception of the terminal can prove that the communication quality of the wireless link between the spatial node and the terminal is better from the side. The HARQ feedback can reflect the communication quality of the radio link between the spatial node and the terminal. The space node adjusts the MCS order according to the received HARQ, and the modulation and coding modes corresponding to different MCS orders are different, so that the adjustment of the modulation and coding modes is realized. Therefore, the spatial node can adjust the modulation coding mode according to the communication quality of the wireless link between the spatial node and the terminal, so as to adapt to the change of wireless communication environment. In the context of spatial communication, however, the spatial node may disable HARQ feedback for the terminal. The space node cannot realize the AMC technology based on the above method, and thus cannot effectively adjust the modulation coding method of the communication between the space node and the terminal, thereby affecting the communication quality of the space communication. Disclosure of Invention An object of the embodiments of the present application is to provide a modulation and coding scheme adjustment method, a spatial node, and a device, so as to adjust a modulation and coding scheme of communication between the spatial node and a terminal in a scenario where HARQ feedback of the terminal is disabled. The specific technical scheme is as follows: in a first aspect, an embodiment of the present application provides a modulation coding mode adjustment method, which is applied to a spatial node, where the method includes: Transmitting a Transport Block (TB) to a terminal through a first hybrid automatic repeat request (HARQ) process, wherein the TB comprises a first radio link layer control (RLC) Service Data Unit (SDU); receiving an RLC status report sent by the terminal for the received first RLC SDU unit; Adjusting the MCS closed loop order corresponding to the first HARQ process according to the receiving result of the first RLC SDU unit contained in the RLC status report, wherein the receiving result indicates whether the terminal successfully receives the first RLC SDU unit; And adjusting a modulation coding mode of the space node based on the communication between the first HARQ process and the terminal based on the adjusted MCS closed loop order. In one embodiment of the present application, the adjusting the MCS closed-loop order corresponding to the first HARQ process according to the receiving result of the first RLC SDU unit contained in the RLC status report includes: according to the receiving result of the first RLC SDU unit contained in the RLC status report, adjusting the current MCS adjustment quantity of the first HARQ process; And calculating the sum of the MCS initial order corresponding to the first HARQ process and the current MCS adjustment quantity to obtain the MCS closed-loop order corresponding to the first HARQ process. In one embodiment of the present application, the adjusting the current MCS ad