UPDATE OF HEADER COMPRESSION STATE IN PACKET COMMUNICATIONS

摘要

The soft state of a header compression scheme in a communication system carrying packet traffic including a real time communication signal can be updated (63) during periods of communication signal inactivity (62), during which there is no need to transmit the communication signal. The header compression soft state can also be updated by stealing bits (83, 84) from th e communication signal to carry the header update information (73). If the communication signal includes source encoded data, the header compression so ft state can be updated selectively (126) based on the bit rate (122, 124) of a codec that produced the source encoded data.