CN-122002626-A - Satellite direct connection method, device and storage medium

CN122002626ACN 122002626 ACN122002626 ACN 122002626ACN-122002626-A

Abstract

The application discloses a method, a device and a storage medium for satellite direct connection. The satellite acquires configuration information, sends the configuration information to each terminal in a coverage area, determines a target carrier frequency matched with the terminal according to the configuration information, and sends a lead code to the satellite based on the target carrier frequency, the satellite receives the lead code sent by the terminal, determines the carrier frequency used by the terminal, wherein the carrier frequency is obtained by analyzing a carrier signal corresponding to the lead code, judges whether a current wave position is matched with the carrier frequency obtained by analysis by the satellite, and if so, sends uplink resource information distributed for the terminal to the terminal, and receives a terminal identifier returned by the terminal. Therefore, the method can reduce the situation that the corresponding uplink resource information cannot be sent to the corresponding terminal when the uplink resource information is sent.

Inventors

ZHANG PENG
WANG WEI
LIN GUANGRONG

Assignees

银河航天(西安)科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260410

Claims (10)

1. A method for direct satellite connection, comprising: the satellite acquires configuration information and sends the configuration information to each terminal in the coverage area, wherein carrier frequency information corresponding to each wave bit is recorded in the configuration information; The terminal determines a target carrier frequency matched with the terminal according to the configuration information, and sends a preamble to the satellite based on the target carrier frequency; the satellite receives the preamble transmitted by the terminal and determines the carrier frequency used by the terminal based on the preamble, and And the satellite judges whether the current wave position is matched with the determined carrier frequency according to the configuration information, if so, the satellite sends the uplink resource information allocated for the terminal to the terminal, and receives the terminal identification returned by the terminal.
2. The method of claim 1, wherein the act of transmitting the configuration information to each terminal within a coverage area comprises: And broadcasting the configuration information to terminals in the actual geographic positions corresponding to the wave positions in the process that the satellite scans the wave positions through the wave beams.
3. The method of claim 1, wherein transmitting a preamble to the satellite based on the target carrier frequency comprises: The terminal selects a preamble to be used, generates a plurality of subcarriers according to the target carrier frequency and the preamble, and transmits the preamble to the satellite through the subcarriers according to random access time RO corresponding to the preamble.
4. The method of claim 1, wherein before the satellite determines whether the current wave position matches the determined carrier frequency, the method further comprises: under the condition that the satellite receives the lead code sent by the terminal, acquiring the wave position center position of the wave position matched with the determined carrier frequency; Determining the sending time of the preamble sent by the terminal and the receiving time of the satellite, and determining the actual distance between the terminal and the satellite according to the sending time and the receiving time; Judging whether the terminal is in an actual geographical area of a wave position corresponding to the wave position center position according to the actual distance and the wave position center position; The operation of the satellite for judging whether the current wave position is matched with the determined carrier frequency comprises the following steps: And if the satellite judges that the terminal is in the actual geographical area of the wave position corresponding to the wave position center position according to the actual distance and the wave position center position, judging whether the current wave position is matched with the determined carrier frequency.
5. The method of claim 4, wherein determining whether the terminal is in an actual geographic area of a wave position corresponding to the wave position center position based on the actual distance and the wave position center position comprises: The satellite determines Doppler frequency offset corresponding to the preamble; the satellite determines the relative movement speed of the satellite relative to the terminal according to the Doppler frequency offset; The satellite determines a cosine value of a first angle and a length value of the actual distance projected on a first plane according to the height of the satellite and the actual distance, wherein the first plane represents a horizontal plane where the satellite is located, and the first angle represents a direction angle of the terminal in the first plane relative to the moving direction of the satellite; The satellite determines a second angle according to the relative moving speed, the actual speed of the satellite and the cosine value of the first angle, wherein the second angle represents the direction angle of the terminal in a second plane relative to the moving direction of the satellite, and the second plane represents the vertical plane of the satellite and the terminal; the satellite determining the ground position of the terminal relative to the satellite based on the second angle and the length of the actual distance projected onto the first plane, and And the satellite judges whether the terminal is in an actual geographical area of the wave position corresponding to the wave position center position according to the ground position of the terminal relative to the satellite and the wave position center position.
6. A storage medium comprising a stored program, wherein the method of any one of claims 1 to 5 is performed by a processor when the program is run.
7. A satellite direct connection device, comprising: the first sending module is used for obtaining configuration information through a satellite and sending the configuration information to each terminal in the coverage area, wherein carrier frequency information corresponding to each wave bit is recorded in the configuration information; The second sending module is used for determining a target carrier frequency matched with the second sending module according to the configuration information through the terminal and sending a lead code to the satellite based on the target carrier frequency; The receiving module is used for receiving the lead code sent by the terminal through the satellite and determining the carrier frequency used by the terminal based on the lead code; And the uplink resource allocation module is used for judging whether the current wave position is matched with the determined carrier frequency through the satellite according to the configuration information, if so, sending the uplink resource information allocated for the terminal to the terminal, and receiving the terminal identification returned by the terminal.
8. The apparatus of claim 7, wherein the first transmitting module is configured to broadcast, by the satellite, the configuration information to terminals at actual geographic locations corresponding to each of the wave positions during scanning of each of the wave positions by the satellite through the beam.
9. The apparatus of claim 7, wherein the second transmitting module is configured to select a preamble to be used by the terminal, generate a plurality of subcarriers according to the target carrier frequency and the preamble, and transmit the preamble to the satellite through the plurality of subcarriers according to a random access timing RO corresponding to the preamble.
10. A satellite direct connection device, comprising: processor, and A memory, coupled to the processor, for providing instructions to the processor to process the following processing steps: Acquiring configuration information through a satellite, and sending the configuration information to each terminal in a coverage area, wherein carrier frequency information corresponding to each wave bit is recorded in the configuration information; determining a target carrier frequency matched with the terminal according to the configuration information by the terminal, and transmitting a preamble to the satellite based on the target carrier frequency; Receiving a preamble sent by the terminal through the satellite, and determining a carrier frequency used by the terminal based on the preamble; And judging whether the current wave position is matched with the determined carrier frequency through the satellite according to the configuration information, if so, sending uplink resource information distributed for the terminal to the terminal through the satellite, and receiving a terminal identifier returned by the terminal.

Description

Satellite direct connection method, device and storage medium Technical Field The present application relates to the field of satellites and satellite communications technologies, and in particular, to a method, an apparatus, and a storage medium for satellite direct connection. Background Satellite communication is a method of realizing communication by using satellites as relays, and is capable of realizing communication even in areas with weak signals such as mountainous areas, because the coverage area of satellite communication is larger than that of communication methods such as 4G, 5G, optical fibers, and the like. Therefore, satellite communication is a communication system that can complement the conventional communication system. At present, a Random access channel (Random ACCESS CHANNEL, RACH) mode can be adopted to realize direct connection between a satellite and a ground terminal, but because of a special data transmission mode of the satellite in a downlink, the terminal is easy to receive uplink resource information sent by the satellite, so that the terminal needs to frequently request the satellite for direct connection in a RACH mode, and the efficiency of realizing direct connection with the satellite by the terminal is low. Aiming at the technical problem that the terminal in the prior art is low in efficiency of realizing direct connection with a satellite, no effective solution is proposed at present. Disclosure of Invention The embodiment of the disclosure provides a method, a device and a storage medium for satellite direct connection, which at least solve the technical problem of low efficiency of realizing direct connection with a satellite by a terminal in the prior art. According to one aspect of the embodiment of the disclosure, a method for directly connecting with a satellite is provided, which comprises the steps that the satellite obtains configuration information and sends the configuration information to each terminal in a coverage area, carrier frequency information corresponding to each wave position is recorded in the configuration information, the terminal determines a target carrier frequency matched with the terminal according to the configuration information and sends a lead code to the satellite based on the target carrier frequency, the satellite receives the lead code sent by the terminal and determines carrier frequency used by the terminal based on the lead code, and the satellite judges whether the current wave position is matched with the determined carrier frequency according to the configuration information, if yes, uplink resource information distributed for the terminal is sent to the terminal, and a terminal identifier returned by the terminal is received. According to another aspect of the embodiments of the present disclosure, there is also provided a storage medium including a stored program, wherein the method of any one of the above is performed by a processor when the program is run. According to another aspect of the embodiment of the disclosure, there is further provided a device for direct connection of a satellite, which includes a first transmitting module configured to acquire configuration information through the satellite and transmit the configuration information to each terminal in a coverage area, wherein carrier frequency information corresponding to each wave bit is recorded in the configuration information, a second transmitting module configured to determine a target carrier frequency matched with the terminal according to the configuration information by the terminal and transmit a preamble to the satellite based on the target carrier frequency, a receiving module configured to receive the preamble transmitted by the terminal by the satellite and determine a carrier frequency used by the terminal based on the preamble, and an uplink resource allocation module configured to determine whether a current wave bit is matched with the determined carrier frequency by the satellite according to the configuration information, if yes, transmit uplink resource information allocated to the terminal, and receive a terminal identifier returned by the terminal. According to another aspect of the embodiment of the disclosure, there is provided a device for direct connection of a satellite, which includes a processor, and a memory connected to the processor, and configured to provide instructions for the processor to process steps of acquiring configuration information by the satellite and transmitting the configuration information to each terminal in a coverage area, wherein carrier frequency information corresponding to each wave bit is recorded in the configuration information, determining a target carrier frequency matched with the terminal according to the configuration information, transmitting a preamble to the satellite based on the target carrier frequency, receiving the preamble transmitted by the terminal by the satellite, determining a