Synchronous payload pointer processing system in digital data tr

Details Synchronous payload pointer processing system in digital data tr Synchronous payload pointer processing system in digital data tr

1994-08-01

1995-11-28

Kizou, Hassan

Multiplex communications

Wide area network

Packet switching

3701054, 3701101, 375372, H04J 306

Patent

active

054714761

ABSTRACT:
A synchronous payload processing system in a synchronous transmission network for transmitting information in SONET or CCITT signals includes a pointer detection unit which monitors a group of pointer bytes in a receive multiplex signal applied thereto and determines pointer values in that group of the pointer bytes monitored. A storage unit also receives the multiplex signal and stores payload data carried thereby. A write timing signal generator unit is coupled to the pointer detection unit and to the storage unit to provide thereto a write clock signal generated in response to a receive clock signal applied to the write timing generator unit. A read timing signal generator unit generates a read clock signal supplied to the storage unit. A phase difference counter unit counts a phase difference between a receive frame timing signal and a transmit frame timing signal supplied thereto and applies that phase difference to a pointer detection unit which is also coupled to the storage unit and to a phase comparator which produces a control signal applied to and processed in the pointer addition unit which produces a new group of pointer values and adds overhead bytes thereof to payload data from the storage unit to generate a transmit multiplex signal.

REFERENCES:
patent: 5067126 (1991-11-01), More
patent: 5111485 (1992-05-01), Serack
patent: 5113395 (1992-05-01), Murakami
patent: 5142529 (1992-08-01), Parruck et al.
patent: 5172376 (1992-12-01), Chopping et al.

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