Gain Control Based Adaptive Header Compression Method for Satellite Link Quality

Abstract

The present invention provides a satellite link quality adaptive header compression method based on gain control, including the operation mode adaptive process, the compression range adaptive process, and the full header request retransmission process. In this way, the compressibility of each segment of payload is evaluated separately, and the payload that can benefit from compression is compressed, and when the decompression end finds that the decompression of the data packet fails, it actively initiates a context update request to the compression end; this type The compression method uses the bandwidth more effectively and saves the transmission power by transmitting the changed information in the header of the packet. According to different link environments and connection characteristics, the working mode and working parameters are adaptively selected to maximize the compression gain and shorten the recovery time after the end node context is out of sync.

Description

technical field [0001] The invention relates to a satellite link quality adaptive header compression method based on gain control. Background technique [0002] With the development of information and network technology, wireless and mobile communication are increasingly used by users due to their flexible advantages. In terms of satellite communication, due to limited satellite channel resources and high channel bit error rate, large headers in IPv4 packets will reduce bandwidth utilization and service quality. Example: IP-based audio application requires 20 bytes of IP header or 40 bytes of IPv6 header, 8 bytes of UDP header and 12 bytes of RTP header, the total header overhead is 40 bytes (IPv4) or 60 bytes section (IPv6), and the load data to be transmitted is only 15 to 32 bytes, which is determined by the specific encoding. Usually, the voice service packet transmission interval is 20ms, and the bandwidth consumed by the total header is 16kbps (IPv4) or 24kbps (IPv6 ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of satellite link quality self-adaptive header compression method based on gain control to solve existing compression technology and adopt static control mode, adopt unified compression processing under various circumstances, when link bit error occurs, Due to some errors in the compressed message, the decompression will fail, and measures need to be taken to synchronize the context between the end nodes. When the bit error is serious, this recovery process will consume too much channel resources and time.

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