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CN-122027008-A - Ship full-course satellite communication method, system and storage medium

CN122027008ACN 122027008 ACN122027008 ACN 122027008ACN-122027008-A

Abstract

The application relates to a ship full-route satellite communication method, a system and a storage medium, which are applied to ships carrying 2 or more VSAT terminals, wherein each VSAT terminal is in one-to-one communication connection with each geosynchronous orbit satellite so as to form different communication links; the method comprises the steps of collecting signal condition indexes of each VSAT terminal, wherein the signal condition indexes comprise a carrier-to-noise ratio, a carrier-to-noise ratio density, a packet loss rate and a pitch angle of the VSAT terminal, judging whether each signal condition index meets a corresponding threshold condition for each VSAT terminal respectively, and generating a link degradation score of each VSAT terminal according to the index number meeting the threshold condition, wherein the higher the link degradation score is, the lower the corresponding communication quality is, and determining whether to execute link switching according to the link degradation scores of the active VSAT terminal and the standby VSAT terminal. The problem of the missed switching of traditional scheme has been solved, the stability of the full route satellite communication link of boats and ships has been promoted.

Inventors

  • HAN KEN
  • LI MENGTIAN

Assignees

  • 海卫通网络科技有限公司

Dates

Publication Date
20260512
Application Date
20260415

Claims (10)

  1. 1. A ship full-route satellite communication method is characterized by being applied to ships carrying 2 or more VSAT terminals, wherein each VSAT terminal is in one-to-one communication connection with each geosynchronous orbit satellite to form different communication links, and the method comprises the following steps: collecting signal condition indexes of each VSAT terminal, wherein the signal condition indexes comprise a carrier-to-noise ratio, a carrier-to-noise ratio density, a packet loss rate and a pitch angle of the VSAT terminal; Judging whether each signal condition index meets a corresponding threshold condition or not according to each VSAT terminal, and generating a link degradation score of each VSAT terminal according to the index quantity meeting the threshold condition, wherein the higher the link degradation score is, the lower the corresponding communication quality is; and determining whether to execute link switching according to the link degradation scores of the primary VSAT terminal and the standby VSAT terminal.
  2. 2. The ship full-course satellite communication method according to claim 1, wherein generating a link degradation score for each of the VSAT terminals according to the number of indexes satisfying a threshold condition comprises: for each VSAT terminal, setting a degradation confidence factor corresponding to any signal condition index to 1 each time the signal condition index meets a corresponding threshold condition; And carrying out weighted summation on each degradation confidence factor by adopting corresponding index weight to obtain the link degradation score.
  3. 3. The marine all-line satellite communication method according to claim 1, wherein determining whether to perform a link switch according to a link degradation score of the primary VSAT terminal and the backup VSAT terminal comprises: And if the link degradation score of the primary VSAT terminal is higher than the link degradation score of the standby VSAT terminal, switching from the primary VSAT terminal to the standby VSAT terminal.
  4. 4. The marine all-line satellite communication method according to claim 1, wherein determining whether to perform a link switch according to a link degradation score of the primary VSAT terminal and the backup VSAT terminal comprises: If the link degradation score of the primary VSAT terminal and the link degradation score of the standby VSAT terminal reach a first score threshold, correspondingly subtracting each signal condition index of the primary VSAT terminal from each signal condition index of the standby VSAT terminal; And when any signal condition index is met, the index of the primary VSAT terminal is inferior to the index of the standby VSAT terminal, and the absolute value of the difference value of the index and the standby VSAT terminal is larger than a preset difference value threshold, switching from the primary VSAT terminal to the standby VSAT terminal.
  5. 5. The marine all-line satellite communication method of claim 3 or claim 4, wherein after switching from the primary VSAT terminal to the backup VSAT terminal, the method further comprises: Acquiring signal condition indexes of the main VSAT terminal; Judging whether each signal condition index meets a corresponding threshold condition, and generating a link degradation score of the active VSAT terminal according to the index quantity meeting the threshold condition; Judging whether the link degradation score of the active VSAT terminal is lower than a second score threshold value or not; If yes, switching from the standby VSAT terminal to the active VSAT terminal.
  6. 6. The method of claim 1, wherein collecting pitch angles of each of the VSAT terminals comprises: Calculating longitude difference between VSAT earth station and satellite point ; Calculating a geocentric included angle theta between the VSAT earth station and the satellite subsurface point at the sphere center of the earth; Based on the earth center included angle theta, the earth radius Re and the satellite orbit height h, the method is derived from cosine theorem and can be used for obtaining: ; Wherein El represents the pitch angle of each VSAT terminal, which can be obtained through arcsinEl, or Based on the earth center angle θ, the earth radius Re, and the satellite orbit height h, the deduction is made: ; And obtaining the pitch angle of each VSAT terminal through arctanEl.
  7. 7. The marine all-line satellite communication method according to claim 1, wherein prior to collecting the signal condition indicators for each of the VSAT terminals, the method further comprises: acquiring satellite coverage maps corresponding to the VSAT terminals in the range of a ship route, and determining overlapping areas among the satellite coverage areas in the satellite coverage maps; When the shortest distance between the ship and the overlapping area is smaller than a preset distance threshold, triggering a link switching instruction to start to collect signal condition indexes of all the VSAT terminals and execute link quality assessment.
  8. 8. The marine all-line satellite communication method according to claim 7, wherein prior to collecting the signal condition indicators for each of the VSAT terminals, the method further comprises: acquiring working longitudes of satellites corresponding to the VSAT terminals; and determining the installation position of the active VSAT terminal according to the ship route, the satellite coverage map and the working longitude of the satellite.
  9. 9. A marine full line satellite communication system, comprising: 2 or more VSAT terminals, each VSAT terminal being in one-to-one communication connection with each geosynchronous orbit satellite to form different communication links; The data acquisition module is used for acquiring signal condition indexes of each VSAT terminal, wherein the signal condition indexes comprise a carrier-to-noise ratio, a carrier-to-noise ratio density, a packet loss rate and a pitch angle of the VSAT terminal; An edge calculation layer, configured to receive signal condition indexes of each VSAT terminal, and determine a link switching policy based on the ship full-line satellite communication method according to any one of claims 1 to 8; and the link switching equipment is used for executing the link switching action according to the link switching strategy.
  10. 10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any one of claims 1 to 8.

Description

Ship full-course satellite communication method, system and storage medium Technical Field The application relates to the field of ship route communication, in particular to a ship whole-route satellite communication method, a system and a storage medium. Background The ship relying on satellite communication in the Ku/ka frequency band of the geosynchronous orbit can cause relative change of the satellite position pointed by a VSAT terminal (very small caliber terminal) antenna in navigation, an originally non-shielded link can be shielded by a ship body superstructure (such as a mast and a cabin), and if switching is tried after shielding (link interruption) occurs, the communication interruption time is too long. In order to solve the problem, the configuration of the double very small caliber terminal is mainly adopted at present, namely two sets of very small caliber terminals are installed to butt-joint two satellites. But the matched network switching equipment technology is simpler, the link switching equipment monitors the packet loss rate of the main VSAT terminal in real time, and when the packet loss rate exceeds a preset threshold value, the switching is directly triggered to switch the communication link to the standby VSAT terminal. The design of this scheme is originally intended to solve the problem of sheltering from through the double-terminal redundancy, but in practical application, the stability of boats and ships full-line satellite communication link is relatively poor. Disclosure of Invention In view of the foregoing, it is desirable to provide a method, system and storage medium for full-line satellite communication for a vessel that can improve the stability of the full-line satellite communication link for a vessel. In a first aspect, the present application provides a ship full-line satellite communication method, applied to a ship carrying 2 or more VSAT terminals, where each VSAT terminal is in one-to-one communication connection with each geosynchronous orbit satellite to form different communication links, the method comprising: collecting signal condition indexes of each VSAT terminal, wherein the signal condition indexes comprise a carrier-to-noise ratio, a carrier-to-noise ratio density, a packet loss rate and a pitch angle of the VSAT terminal; Judging whether each signal condition index meets a corresponding threshold condition or not according to each VSAT terminal, and generating a link degradation score of each VSAT terminal according to the index quantity meeting the threshold condition, wherein the higher the link degradation score is, the lower the corresponding communication quality is; and determining whether to execute link switching according to the link degradation scores of the primary VSAT terminal and the standby VSAT terminal. In one embodiment, generating a link degradation score for each VSAT terminal according to the number of indicators meeting the threshold condition includes: for each VSAT terminal, setting a degradation confidence factor corresponding to any signal condition index to 1 each time the signal condition index meets a corresponding threshold condition; And carrying out weighted summation on each degradation confidence factor by adopting corresponding index weight to obtain the link degradation score. In one embodiment, determining whether to perform a link handoff according to a link degradation score of a primary VSAT terminal and a backup VSAT terminal includes: And if the link degradation score of the primary VSAT terminal is higher than the link degradation score of the standby VSAT terminal, switching from the primary VSAT terminal to the standby VSAT terminal. In one embodiment, determining whether to perform a link handoff according to a link degradation score of a primary VSAT terminal and a backup VSAT terminal includes: If the link degradation score of the primary VSAT terminal and the link degradation score of the standby VSAT terminal reach a first score threshold, correspondingly subtracting each signal condition index of the primary VSAT terminal from each signal condition index of the standby VSAT terminal; And when any signal condition index is met, the index of the primary VSAT terminal is inferior to the index of the standby VSAT terminal, and the absolute value of the difference value of the index and the standby VSAT terminal is larger than a preset difference value threshold, switching from the primary VSAT terminal to the standby VSAT terminal. In one embodiment, after switching from the primary VSAT terminal to the backup VSAT terminal, the method further comprises: Acquiring signal condition indexes of the main VSAT terminal; Judging whether each signal condition index meets a corresponding threshold condition, and generating a link degradation score of the active VSAT terminal according to the index quantity meeting the threshold condition; Judging whether the link degradation score of the active VSAT terminal i