CN-122002625-A - Access method, device and storage medium based on satellite direct connection

CN122002625ACN 122002625 ACN122002625 ACN 122002625ACN-122002625-A

Abstract

The application discloses an access method, device and storage medium based on satellite direct connection. The method comprises the steps of receiving an access request by a satellite, recording the receiving time and the current position of the satellite when the corresponding access request is received, determining a preamble obtained by analyzing the access request, determining the sending time, the receiving time and the carrier frequency, determining continuous access requests with the same preset number of sequence number preambles as the access request of the same terminal, determining the actual position of the corresponding terminal according to the sending time, the receiving time and the current position of the satellite corresponding to the access request of the same terminal, determining the geographic position of a wave position corresponding to the carrier frequency according to the carrier frequency of the same terminal, and returning uplink resource information to the corresponding terminal under the condition that the actual position is matched with the geographic position. Therefore, the method can identify the illegal terminal which does not send the access request according to the specification, so that the satellite can prevent the intrusion risk in the RACH process.

Inventors

YANG WENHAN
LIN GUANGRONG
WANG WEI

Assignees

银河航天(西安)科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260410

Claims (10)

1. An access method based on satellite direct connection is characterized by comprising the following steps: receiving an access request, and recording the receiving time and the current position of a satellite when receiving the corresponding access request, wherein the access request is sent by a terminal according to the carrier frequency corresponding to the wave position; determining a preamble obtained by analyzing an access request, and determining a sending time and a carrier frequency corresponding to the access request; Determining continuous access requests with the same preset number of preambles as access requests of the same terminal; Determining the actual position of the corresponding terminal according to the sending time, receiving time and satellite current position respectively corresponding to the access request of the same terminal, determining the geographic position of the wave position corresponding to the carrier frequency according to the carrier frequency of the same terminal, and And returning uplink resource information to the corresponding terminal under the condition that the actual position is matched with the geographic position, and performing security control on an access request of the corresponding terminal under the condition that the actual position is not matched with the geographic position.
2. The method of claim 1, wherein determining the actual location of the corresponding terminal based on the respective transmission time, reception time and current satellite location of the access request of the same terminal comprises: for each access request of the same terminal, determining the distance between the terminal and the satellite when the terminal sends the access request according to the sending time and the receiving time corresponding to the access request; And calculating the actual position of the corresponding terminal according to the distance corresponding to each access request and the current position of the satellite.
3. The method according to claim 1, wherein the method further comprises: And broadcasting configuration information to each terminal, wherein the configuration information comprises sending time information and carrier frequency information corresponding to each wave bit, the configuration information is used for the terminal to send an access request according to the corresponding relation between the wave bit and the carrier frequency, and the sending time information is used for the terminal to continuously send the access requests with the same three leading codes according to preset time.
4. A method according to claim 3, wherein the operation of returning uplink resource information to the respective terminal in case the actual location and the geographical location match comprises: And returning uplink resource information to the corresponding terminal under the condition that the actual position is matched with the geographic position and the current wave position is the same as the wave position corresponding to the carrier frequency used by the corresponding terminal.
5. A storage medium comprising a stored program, wherein the method of any one of claims 1 to 4 is performed by a processor when the program is run.
6. An access device based on satellite direct connection, comprising: the receiving module is used for receiving an access request, recording the receiving time and the current position of the satellite when receiving the corresponding access request, wherein the access request is sent by the terminal according to the carrier frequency corresponding to the wave position; The information determining module is used for determining a preamble obtained by analyzing the access request and determining the sending time and the carrier frequency corresponding to the access request; a continuous request determining module, configured to determine continuous access requests with the same preset number of preambles as access requests of the same terminal; A position determining module for determining the actual position of the corresponding terminal according to the sending time, receiving time and satellite current position respectively corresponding to the access request of the same terminal, and determining the geographic position of the wave position corresponding to the carrier frequency according to the carrier frequency of the same terminal, and And the matching module is used for returning uplink resource information to the corresponding terminal under the condition that the actual position is matched with the geographic position, and carrying out security control on the access request of the corresponding terminal under the condition that the actual position is not matched with the geographic position.
7. The apparatus of claim 6, wherein the location determining module is configured to determine, for each access request of the same terminal, a distance between the terminal and the satellite when the terminal transmits the access request based on a transmission time and a reception time corresponding to the access request, and calculate an actual location of the corresponding terminal based on the distance corresponding to each access request and a current location of the satellite.
8. The apparatus of claim 6, further comprising a broadcasting module configured to broadcast configuration information to each terminal, wherein the configuration information includes transmission timing information and carrier frequency information corresponding to each wave bit, the configuration information is used for the terminal to transmit an access request according to a correspondence between wave bits and carrier frequencies, and the transmission timing information is used for the terminal to continuously transmit access requests with the same three preambles according to a predetermined timing.
9. The apparatus of claim 8, wherein the matching module is configured to return uplink resource information to the corresponding terminal if the actual location matches the geographic location and a current wave position is the same as a wave position corresponding to a carrier frequency used by the corresponding terminal.
10. An access device based on satellite direct connection, comprising: processor, and A memory, coupled to the processor, for providing instructions to the processor to process the following processing steps: receiving an access request, and recording the receiving time and the current position of a satellite when receiving the corresponding access request, wherein the access request is sent by a terminal according to the carrier frequency corresponding to the wave position; Determining a preamble obtained by analyzing the access request, and determining a sending time and a carrier frequency corresponding to the access request; Determining continuous access requests with the same preset number of preambles as access requests of the same terminal; Determining the actual position of the corresponding terminal according to the sending time, receiving time and satellite current position respectively corresponding to the access request of the same terminal, determining the geographic position of the wave position corresponding to the carrier frequency according to the carrier frequency of the same terminal, and And returning uplink resource information to the corresponding terminal under the condition that the actual position is matched with the geographic position, and performing security control on an access request of the corresponding terminal under the condition that the actual position is not matched with the geographic position.

Description

Access method, device and storage medium based on satellite direct connection Technical Field The present application relates to the field of satellites and satellite communications technologies, and in particular, to an access method, apparatus, and storage medium based on satellite direct connection. Background In the satellite communication technology, there may be an attack on the satellite communication system by the terminal device, and further, the terminal device of the normal user in the satellite communication system may be invaded, so it is very important in the satellite communication technology to prevent the attack on the terminal device from causing loss to the satellite communication system. Currently, in satellite communication, a terminal (such as a mobile phone) of a user is directly connected with a satellite through a Random access channel (Random ACCESS CHANNEL, RACH), so that in order to improve the Random access efficiency, the satellite can provide some configuration information set by the satellite to the user, but the risk of intrusion of the satellite is also increased. For example, an attacker may frequently initiate random access requests according to configuration information provided by the satellite, so that other terminals cannot normally access the satellite communication system. In view of the above technical problem that the satellite communication system in the prior art has a risk of being invaded, no effective solution has been proposed at present. Disclosure of Invention The embodiment of the disclosure provides an access method, a device and a storage medium based on satellite direct connection, which at least solve the technical problem that a satellite communication system is in the prior art at risk of being invaded. According to one aspect of the embodiment of the disclosure, an access method based on satellite direct connection is provided, which comprises the steps of receiving an access request, recording receiving time and the current position of a satellite when the corresponding access request is received, wherein the access request is sent by a terminal according to the carrier frequency corresponding to the wave position, determining a preamble obtained by analyzing the access request, determining the sending time and the carrier frequency corresponding to the access request, determining the same continuous access request with the same preset number of preambles as the access request of the same terminal, determining the actual position of the corresponding terminal according to the sending time, the receiving time and the current position of the satellite respectively corresponding to the access request of the same terminal, determining the geographic position of the wave position corresponding to the carrier frequency according to the carrier frequency of the same terminal, and returning uplink resource information to the corresponding terminal when the actual position and the geographic position are matched, and performing safety control on the access request of the corresponding terminal when the actual position and the geographic position are not matched. 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, an access device based on satellite direct connection is provided, which comprises a receiving module, an information determining module, a continuous request determining module, a position determining module and a matching module, wherein the receiving module is used for receiving an access request, recording the receiving time and the current position of a satellite when the corresponding access request is received, the access request is sent by a terminal according to the carrier frequency corresponding to the carrier frequency, the information determining module is used for determining a preamble obtained by analyzing the access request and determining the sending time and the carrier frequency corresponding to the access request, the continuous request determining module is used for determining the continuous access requests with the same preset number of preambles as the access request of the same terminal, the position determining module is used for determining the actual position of the corresponding terminal according to the sending time, the receiving time and the current position of the satellite respectively corresponding to the access request of the same terminal, and determining the geographic position corresponding to the carrier frequency according to the carrier frequency of the same terminal, and the matching module is used for carrying out safety control on the access request of the corresponding terminal under the condition that the actual position and the geographic position are n