Patent ID: 6608841
Filing Date: 2003-08-19
Classification: H04L

Abstract:
A data network, comprising:a first node comprising a header compressor/de-compressor for compressing/de-compressing headers of data packets for transmission via a bandwidth-limited link; and a second node comprising a header compressor/de-compressor for compressing/de-compressing headers of data packets for transmission via said bandwidth-limited link, wherein header compression and reconstruction are obtained by first establishing a context state for non-changing fields as well as first-order differences for changing fields between a compressor of one of said first node and said second node and a de-compressor of another one of said first node and said second node, and then when a second-order difference of any field is non-zero, sending a particular packet whose second-order difference is non-zero with a new first-order difference along with those following packets with the new first-order difference until a positive confirmation is received by the compressor that the new first-order difference has been received or until expiration of a predetermined period.