A method for secure satellite communication

Abstract

The invention relates to a method for secure satellite communication, comprising: transmitting a first data packet by a source terminal to an access satellite of the source terminal; determining an associated terrestrial gateway station by the source terminal accessing the satellite and transmitting the address of the source terminal accessing the satellite and the destination terminal address tothe terrestrial gateway station; determining an address of a destination terminal access satellite associated with the destination terminal address by a ground gateway station and transmitting the address of the destination terminal access satellite back to the source terminal access satellite according to the address of the source terminal access satellite; transmitting a second data packet to adestination terminal access satellite by a source terminal access satellite through an inter-satellite link; and transmitting the third data packet to the destination terminal by the destination terminal access satellite. By the method, the user communication data can be transmitted through the inter-satellite link instead of the ground gateway station, thereby ensuring the communication security;In addition, on-board intensive operations such as routing computation can be reduced or even eliminated.

Description

technical field [0001] The present invention relates generally to the field of satellite communications, and in particular to a method for secure satellite communications. Background technique [0002] Due to the limitations of low orbit height and limited coverage, low-orbit satellite communication usually requires dozens to hundreds of satellites to form a constellation to achieve seamless global communication coverage, so as to provide users with global communication services. Due to the different satellites in different regions, there are two main ways to realize the mutual communication between user terminals in different regions: 1) Communication through ground gateway stations: the satellites above the user terminals forward the user terminal communication data to the ground gateway stations, and the gateway stations receive into the ground communication network and forwarded by the ground communication network to the destination user terminal at the other end (such a...

AI Technical Summary

Problems solved by technology

However, due to the large number of low-orbit satellites and the low cost of a single satellite, the on-board processing capacity of low-orbit satellites is limited, so it is difficult to realize exchange or routing between terminals on the star, so that it cannot effectively support low-orbit satellite security communications (such as Figure 4 shown)

Therefore, the existing technologies cannot or are difficult to solve the problem of direct communication between large-scale user terminals in the low-orbit satellite communication system without landing data, so that this type of communication has the risk of being attacked by data landing, and lacks sufficient communication security.

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