Isomeric link frame size adaptive method applied to aerospace information network

Abstract

The invention discloses an isomeric link frame size adaptive method applied to an aerospace information network. Through analyzing and comparing a rate R of the number of negative feedback signals to the number of positive feedback signals in the process of selective automatic retransmission during a certain period T, the transmission frame size is dynamically adjusted, so that the utilization rate of a channel is maximized, and the communication ability of the aerospace information network is comprehensively improved; and through adopting the adaptive frame size, the disturbing influence on a link of the aerospace information network can be sensed more accurately, thereby improving the efficiency of network communication. The aerospace information network comprises at least a geostationary satellite, a set of low earth orbit satellites and a ground control center, wherein signal carriers are transmitted among earth station and the satellites, and the ground control center manages a plurality of adjacent earth stations, sends control information to the earth stations, and is mainly used for improving the utilization rate of a channel under the condition that factors such as environments and the like cause interference on satellite signal links.

Description

technical field [0001] The present invention relates to a heterogeneous link frame length self-adaptive method applied to an aerospace information network, specifically a method for estimating channel bit errors by analyzing the ratio of positive feedback signals and negative feedback signals in satellite network selective retransmission mechanisms The method for adaptively controlling the length of the data unit of the data link layer according to the rate situation belongs to the technical field of satellite communication. Background technique [0002] The aerospace information network is a large three-dimensional network resource system that integrates space, space, and ground. It covers the orbit of high-orbit satellites from the surface of the earth to more than 36,000 kilometers above the ground. The environment, platform, business, and heterogeneous networks are integrated. , Self-organizing networking, high-speed data transmission, etc. constitute the basic elements ...

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Problems solved by technology

[0007]Technical problem: According to the above, since various factors of the natural environment will interfere with satellite network links, the present invention provides a The heterogeneous link frame length adaptive method of the network, which uses a ratio of the negative feedback signal to the positive feedback signal in the selective retransmission mechanism to estimate the channel bit error rate and adaptively adjust the link frame length strategy, which solves the problem of low channel utilization caused by the interference of the environment and other factors on the satellite link

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