Patent ID: 6985965

Claim:
A communication entity comprising: a combined static/dynamic dictionary containing text of at least one field name associated with a communication protocol including at least one of a Session Initiation Protocol (SIP) and a Session Description Protocol (SDP); a compressor in communication with said combined static/dynamic dictionary, said compressor using said combined static/dynamic dictionary to compress a data packet associated with at least one of a SIP message and a SDP message by replacing at least one field name therein that matches the text of the at least one field name stored within said dictionary with a pointer to a location in said combined static/dynamic dictionary that contains the matched text; said combined static/dynamic dictionary includes a static dictionary which has text stored therein that was added before commencement of communications with a remote communication entity, wherein said text stored therein was selected based upon statistical data flows of said communication protocol; and said combined static/dynamic dictionary further includes a dynamic dictionary which has text stored therein that was added after commencement of the communications with the remote communication entity.