Cell disassembly unit

Details Cell disassembly unit Cell disassembly unit

2006-10-03

2006-10-03

Ferris, Derrick (Department: 2616)

Multiplex communications

Communication techniques for information carried in plural...

Assembly or disassembly of messages having address headers

C370S395700

Reexamination Certificate

active

07116684

ABSTRACT:
The present invention provides a cell disassembly unit which accurately reproduces the position of data on a time axis when ATM cells are converted into STM signals even if cell loss occurs in an ATM network. A cell loss detection circuit disassembles the ATM cells into bytes, sends them to the memory, and detects the number of lost bytes M of the ATM cells. A sequence number generation circuit generates the sequence number N, which is N=N+1 if there is no loss, and N=N+M if there is loss, in the sequence of the transmission of bytes from the cell loss detection circuit. A write address generation circuit generates a write address, and a read address generation circuit generates a read address. A selector sends either the bytes read from the memory or dummy data generated by the dummy data generation circuit to the outside as STM signals. A sequence number confirmation circuit checks the continuity of the sequence numbers N read from the memory, and sends the dummy data insertion signal to the read address generation circuit and the selector if the sequence number has jumped.

REFERENCES:
patent: 5914954 (1999-06-01), Nakayama
patent: 6061352 (2000-05-01), Yamazaki et al.
patent: 6826192 (2004-11-01), Shimamura et al.

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