Method for reducing transmission control protocol (TCP) message loss in space information network

Abstract

The invention provides a method for reducing transmission control protocol (TCP) message loss in a space information network. According to the method, data packet loss can be effectively reduced, link throughput can be improved, and unnecessary retransmission of a transmitting end in case of link disconnection is prevented. The method is implemented as follows: a transmitting storage module is added at a transmitting end of the TCP; according to a known motion track of a man-made satellite and a predictable characteristic of link disruption due to celestial body blocking, a communication time sequence PAB (t) between any nodes A and B is pre-arranged in the space information network with a node motion rule that can be followed, wherein when PAB (t) is equal to 1, nodes A and B are in a link communication state at the time t, when PAB (t) is equal to 0, nodes A and B are in a link disconnection state at time t; while the network operates, for any time t0, a sending node A firstly verifies the value of PAB(t0), if PAB (t0) is equal to 1, a data packet is sent to a target node B; and if PAB (t0) is equal to 0, the data packet is cached in the storage module of the TCP, and the cached data packet is extracted from the cache and is recovered and sent at next time when PAB (t) is equal to 1 and t is equal to t1.

Description

technical field [0001] The invention relates to a method for improving the performance of a transmission control protocol (TCP) in the technical field of space information network communication protocols, in particular to a method for adding a sending storage module in the TCP protocol of the transport layer to reduce the loss of TCP messages. Background technique [0002] With the rapid development of electronic and wireless communication technology, the network has penetrated into all aspects of human society's production and life. High-speed dynamic node development. Especially in recent years, countries around the world have paid attention to and developed space resources, and the rapid development of aerospace technology has provided good material and technical support for the establishment and development of the space information network system. The space information network system will surely become the future network important part of the world. However, the spatia...

AI Technical Summary

Problems solved by technology

[0010] The present invention aims at the problems of low link resource utilization rate, unreliable message transmission, and increased feedback link transmission volume in the space environment of high bit error, long time delay, and intermittent connection of the standard TCP / IP protocol. The characteristics of the space information network provide a method that can improve the throughput of the TCP protocol, effectively reduce the loss of TCP data packets, and reduce unnecessary retransmissions, so as to improve the problem that the standard TCP protocol cannot adapt to the space environment

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