Compression method, decompression method, compression device and decompression device

Abstract

The invention discloses a compression method, a decompression method, a compression device and a decompression device. The compression method comprises the steps that a first communication device determines the length of a first message header; the first communication device obtains a second message header of which length is the same to that of the first message header from a window according to the length of the first message header; the first communication device obtains compression information of the first message head by comparing each character of the first message header with each character of the second message header at the same locations; and the first communication device sends the compression information to a second communication device. According to the compression method and the compression device provided by the invention, the compression process can be simplified, and the compression delay can be reduced. Correspondingly, according to the decompression method and the decompression device provided by the invention, the decompression delay can be reduced.

Description

technical field [0001] The present invention relates to the technical field of communication, and more particularly, to a compression method, a decompression method, a compression device and a decompression device. Background technique [0002] Compressing the message header is an effective means to improve data transmission efficiency. By compressing the message header, the proportion of effective payload in the message can be increased, and more data packets can be transmitted within a given time. Robust Header Compression (Robust Header Compression, “ROHC” for short) is a commonly used technique for header compression in the prior art. When the ROHC algorithm is used to compress the message header, the main steps include: parsing all the fields in the message header to be compressed; according to the attributes of each field, use the method of deduplication or difference to match the context; according to Matching results output encoded fields and tokens. Although the R...

AI Technical Summary

Problems solved by technology

Although the ROHO compression can effectively combat packet loss between the compressor and the decompressor, when the ROHC algorithm is used to compress the packet header, it is necessary to fully parse the packet header, and according to the Attributes are matched to the corresponding fields to perform compression. This method results in high compression complexity and prolonged compression.

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