ZERO-HEADER COMPRESSION FOR IMPROVED COMMUNICATION EFFICIENCY

摘要

A communication system is disclosed in which a mobile terminal having limited power is able to communicate with a land-based network via a low-rate satellite communication link. To achieve VoIP communications via a low-rate link, link-layer assisted zero-header header compression techniques are employed to reduce VoIP packet overheads. Additionally, overheads introduced by link layer protocol layers are eliminated or reduced. A transmitting device strips RTP / UDP / IP header information from a stream of VoIP packets. The transmitting device then sends an initial context message providing the RTP / UDP / IP header information. The stripped zero-header VoIP packets are then transmitted via a satellite relay. A receiving device uses the initial context information to reconstruct the headers for the zero-header VoIP packets.