Patent ID: 7197687
Filing Date: 2007-03-27
Classification: H04L

Abstract:
1. A header compressed packet receiving apparatus comprising: a receiving section that receives a packet with a compressed header containing part of a sequence number; a header decompressing section that decompresses compressed header information to obtain original header information using the compressed header information and reference information beforehand received; an error detecting section that detects an error of a sequence number in a decompressed header; a candidate sequence number determining section that determines at least one candidate sequence number used in correcting a header, corresponding to the part of the sequence number contained in the compressed header, a time that elapses between previously receiving a packet correctly and receiving a current packet, and a packet receiving interval determined from the number of received packets per unit time when an error is detected in a sequence number; and a header correcting section that decompresses and corrects a header in which the error is detected using the candidate sequence number determined in the candidate sequence number determining section.