PAYLOAD HEADER SUPPRESSION WITH CONDITIONAL FIELD SUPPRESSION, PARTICULARLY FOR ENHANCING THE ROBUSTNESS OF A PHS(PAYLOAD HEADER SUPPRESSION)

摘要

PURPOSE: A payload header suppression with conditional field suppression is provided to improve the compression ration through the conditional field suppression of header fields that frequently change.;CONSTITUTION: Based on an option suppression mask and a payload header, header parts(210) masked to at least one condition unit is determined. The changed and non-changed header parts are determined based on the masked heard parts and the cached header field value. A first part of a dynamic suppression mask corresponding to the changed header parts are set up as the first code. The second part of the dynamic suppression mask corresponding to the non-changed header parts is set up as the second code. The dynamic suppression mask and the changed header parts in the packet are transmitted through a communication medium.;COPYRIGHT KIPO 2010