Method for reducing TCP (Transmission Control Protocol) message loss in space information network

A space information network and message loss technology, applied in the direction of data exchange network, digital transmission system, electrical components, etc., can solve the problem that the TCP protocol cannot adapt to the space environment, the link resource utilization rate is low, and the transmission volume of the feedback link increases To achieve the effect of improving space environment adaptability, reducing the probability of TCP retransmission, and reducing bandwidth pressure

Inactive Publication Date: 2016-06-15
10TH RES INST OF CETC
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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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  • Method for reducing TCP (Transmission Control Protocol) message loss in space information network

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[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] like figure 1 As shown, according to the present invention, a sending storage module is added at the sending end of the TCP protocol; and the connection timing between nodes is preset in the spatial information network where the movement rules of the nodes can be followed. Since the trajectories of various celestial bodies and artificial satellites in the space network are known, and the link interruption caused by celestial body occlusion is predictable, the connection timing between nodes can be preset in the space information network where the movement rules of nodes can be followed. Define the connection timing of any node A and any node B as a function P of time t AB (t), define P AB (t)=1 means that node A and node B are in the state of link connection at time t, define P AB (t)=0 means that node A and node B are in a state of link disconnection at time...

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Abstract

The invention provides a method for reducing TCP (Transmission Control Protocol) message loss in a space information network, and aims at providing a method capable of reducing data packet loss efficiently, increasing link throughput and avoiding meaningless retransmission of a transmitting terminal when a link is disconnected. The method for reducing the TCP message loss in the space information network is realized through the following technical scheme comprising the steps of adding transmission and storage modules at a transmission end of a TCP; presetting a connection time sequence PAB(t) between any node A and a node B based on a known movement track of an artificial satellite and characteristics of link disconnection caused by shielding of a predictable celestial body in the space information network with a node movement rule to follow, wherein PAB(t)=1 indicates that the node A and the node B are in a link connection state at the moment t; and PAB(t)=0 indicates that the node A and the node B are in a link disconnection state at the moment t; firstly verifying the value of the PAB(t0) by the transmitting node A at any moment t0 in a network running process; if PAB(t0)=1, sending a data packet to the target node B; and if PAB(t0)=0, caching the data packet in a storage module of the TCP, wherein the cached data packet is extracted from the cache for transmission in the next moment t=t1 when the PAB (t) is enabled to be equal to 1.

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...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L12/861
CPCH04L69/161H04L49/90
Inventor 周文炯徐会忠杨海峰
Owner 10TH RES INST OF CETC
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