Method for reinforcing TCP protocol performance in satellite communication system

Abstract

The invention discloses a method of enhancing performance of TCP protocol in a satellite communication system, which relates to a technology of satellite communication service accessing to enhance the performance of TCP protocol in the field of satellite communications. The method includes: two Gateway respectively performing cheating response to the client TCP data terminal to increase the TCP sending rate; real-time ensuring of the bandwidth allocation fairness and effectiveness based on TCP connection number and the actual flow of each connection; according to the chain circuit shelter problem, using the number of the confirmation data packs from object terminal host to judge whether shelter takes place, adopting a method of pausing source host sending and fast retransmission of cache data to ensure that the data continue regular transmission after the chain circuit is newly switched on. The present invention is fully compatible with TCP protocol; has advantages of high channel utilization, strong channel adaptability, high reliability, and so on; and is particularly suitable for using TCP / IP protocol to realize the use of satellite communication stations for realizing service access.

Description

technical field [0001] The invention relates to a method for enhancing the performance of a TCP protocol in a satellite communication system in the field of satellite communication, and is particularly suitable for a satellite communication station that utilizes the TCP / IP protocol to realize service access. Background technique [0002] The use of TCP / IP protocol for data transmission has already become the mainstream of network applications. The advantages of satellite communication, such as wide coverage, good broadcasting ability and not being restricted by various geographical conditions, will still play an important role in the future. Satellite communication will be an important means of wireless Internet, and the use of satellites for TCP / IP data transmission (satellite IP network) has become a focus of people's attention. [0003] The TCP protocol uses a sliding window-based flow and congestion control method, implements control by confirming packet flow (receiver w...

AI Technical Summary

Problems solved by technology

[0011] The current TCP protocol performance enhancement technology is mainly divided into two categories: one is to modify or expand the TCP protocol itself according to the characteristics of the satellite channel. Although this method can solve the problem well, it requires the replacement of all user terminal equipment. The protocol stack is obviously not advisable; second, the TCP protocol is converted into another protocol on the satellite link by using protocol conversion, thereby enhancing the TCP transmission performance. At present, such equipment has been developed abroad, but this method requires Protocol conversion equipment must be configured at both ends of the transceiver, which has certain limitations in application, and the data transmission efficiency of such equipment is low under the condition of repeated occlusion of the satellite link, and cannot well support "communication in motion" satellites ground station

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