Multiplex communications – Communication techniques for information carried in plural... – Assembly or disassembly of messages having address headers
Patent
1995-12-12
1997-12-30
Kizou, Hassan
Multiplex communications
Communication techniques for information carried in plural...
Assembly or disassembly of messages having address headers
370522, 371 377, G06F 1110
Patent
active
057038821
ABSTRACT:
A modified cyclic line coding apparatus for error detection and frame recovery which generates a n-bit modified cyclic cord-word by use of k redundancy bits and partially scrambles the cyclic redundancy check bits using periodic scramble bits. The apparatus includes a transmitter including a modified cyclic redundancy generator unit for generating redundancy bits, a variable period sampled scrambler unit for partially scrambling the redundancy bits, a timing control unit for generating a timing signal, and a multiplexer unit for multiplexing input cell data in accordance with the timing signal. The apparatus also includes a receiver including a modified cyclic redundancy checker unit for outputting a block synchronization signal and sample bits when a block synchronization is detected, while outputting a synchronization error signal when no block synchronization is detected, a variable period sampled descrambler unit for generating descramble bits in accordance with the sample bits, a timing recovering unit for generating a timing signal, and a demultiplexer unit for demultiplexing the cell data in accordance with the timing signal. The apparatus can use various cell sizes, can stably receive the user information of cell data and can achieve an easy bit timing detection.
REFERENCES:
patent: 4397020 (1983-08-01), Howson
patent: 5345451 (1994-09-01), Uriu et al.
Jung Hee Young
Lee Bhum Cheol
Park Kwon Chul
Electronics and Telecommunications Research Institute
Kizou Hassan
Korea Telecommunication Authority
Yao Kwang Bin
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