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 successive errors detected by the error detector (702). A successive decompression success counter (706) counts the number of decompression successes that successively appear. By referring to these counted numbers, 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. With this structure, the header decompression apparatus can request update of the reference information based on the state of the error.