Apparatus and method for header decompression

摘要

In a header decompression apparatus (709), a header decompressor (703) refers to reference information stored in a reference information manager (707) to decompress a compressed header of a packet received by a packet receiver (704). An error detector (702) detects a CRC error in the packet with its header decompressed by the packet receiver (704), and outputs only a correct packet. A successive error counter (705) counts the number of decompression successes that successively appear and stores a relationship between the number of error packets and the number of error free packets. By referring to the relationship of the packet number stored by said counter, an update request unit (708) transmits an update request to a transmitting side as required. A reference information manager (707) manages the reference information for header decompression.