Patent ID: 7817635

Claim:
A packet-based communication system comprising: a first network element that receives a first compressed request message from an originating communication device to initiate a communication session between the originating communication device and a terminating communication device, said first compressed request message including parameter entries from a defined first parameter dictionary and a defined second parameter dictionary, said first and second dictionaries containing compressed parameter data elements substituted for non-compressed data elements; and said first network element decompresses the first compressed request message to generate a first decompressed request message for transmission to a communication server, said generation of said first decompressed message occurs after the network element decodes a first parameter using the defined first parameter dictionary, a second parameter using the second defined parameter dictionary having a preferred identity parameter and an access network parameter, and a third parameter using an encoding assistant function, and said first network element transmits said first decompressed request message to a proxy server that was used to register said originating communication device on said first network.