Patent ID: 7328283
Filing Date: 2008-02-05
Classification: H04L

Abstract:
1. A multilayer header compression apparatus comprising: an obtainment section that obtains from the same protocol data unit header information of a lower protocol layer of a plurality of protocol layers, and header information of a higher protocol layer of the plurality of protocol layers; a compression section that compresses the obtained header information of the lower protocol layer with a compression scheme for the lower protocol layer, and the obtained header information of the higher protocol layer with a compression scheme for the higher protocol layer; a header information concatenation section that concatenates the compressed header information of the lower and higher protocol layers to obtain compressed multilayer header information; a gathering section that gathers from the lower and higher protocol layers scheme information indicating the compression scheme for the lower protocol layer, and scheme information indicating the compression scheme for the higher protocol layer; a scheme information concatenation section that concatenates the gathered scheme information from the lower and higher protocol layers to obtain a combination of the scheme information; a generation section that generates identification information for the obtained combination of the scheme information by representing the obtained combination of the scheme information using a single unique expression or number; and an addition section that adds the generated identification information to the obtained, compressed multilayer header information.