Packet synchronization utilizing a multi-length packet...

Details Packet synchronization utilizing a multi-length packet... Packet synchronization utilizing a multi-length packet...

H - Electricity

04

Q

344/1, 344/28

H04Q 1/20 (2006.01) H04L 7/04 (2006.01) H04L 7/10 (2006.01)

Patent

CA 2015405

- 46 - PACKET SYNCHRONIZATION UTILIZING A MULTI-LENGTH PACKET FORMAT INCLUDING CHECK SEQUENCE(S) Abstract Packet synchronization is obtained by employing a unique packet transport word including at least one prescribed parity check pattern in conjunction with a packet length indicator. An at least one prescribed parity check is computed over transport word length blocks of bits of an incoming packet and compared to an expected parity check pattern in predetermined bit positions in the incoming block of bits to identify possible transport word dandidates. Once a transport word candidate is identified, the packet length indicator is used to point to the next transport word candidate. Synchronization is declared upon obtaining a parity match for a subsequent transport word candidate pointed to by the packet length indicator. In a specific embodiment, at least two prescribed panty checks are employed to denote a possible transport word candidate. (FIG. 5).

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