Patent ID: 7986719

Claim:
A packet header compressor, comprising: a computing device configured to send a packet including: a compressed header including: a first value associated with a second uncompressed header, said first value being configured to derive an uncompressed header for said packet based on said second uncompressed header; and a second value associated with a third uncompressed header, said second value being configured to derive said uncompressed header for said packet based on said third uncompressed header, wherein at least one of said second uncompressed header and said third uncompressed header are stored in a storage space configured to maintain a history of transmitted headers and at least one of said second uncompressed header and said third uncompressed header is stored in said history; and wherein said packet further includes a first sequence number, said second uncompressed header includes a second sequence number, said third uncompressed header includes a third sequence number, and the availability of at least one of said second uncompressed header and said third uncompressed header in said history for said packet is determined based on said sequence numbers.