Patent ID: 7000166
Filing Date: 2006-02-14
Classification: H04L

Abstract:
1. A header decompression apparatus for receiving a packet having a compressed header and decompressing the compressed header by referring to reference information, said apparatus comprising: a reference information manager for storing and managing said reference information; a header decompressor, provided with the received packet, for carrying out header decompression by referring to the reference information stored in said reference information manager; an error detector for detecting an error in the packet including the header decompressed by said header decompressor; a counter/storage for counting a number of packets having an error detected by said error detector from among the last W packets decompressed by said header decompressor; and an update request unit for transmitting an update request for requesting update of said reference information stored in said reference information manager, based on the values counted by said counter/storage, wherein W is a predetermined value stored in said counter/storage, and said counter/storage counts the number of packets R having an error detected by said error detector from among the last W packets decompressed by said header decompressor, wherein W is an integer and R is an integer.