Frame synchronizing device

Details Frame synchronizing device Frame synchronizing device

1995-11-13

1998-01-20

Nguyen, Chau

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

370514, 375368, H04L 708

Patent

active

057107742

ABSTRACT:
A frame synchronizing device for discriminating a time slot location for each channel of time-division multiplexed signals is disclosed. The frame synchronizing device according to the invention processes time-division multiplexed signals in parallel in a STM-4C(Synchronous Transport Module-4 Concatenation) of the Broadband Integrated Service Digital Network according to the ITU-T recommendation, such that the searching of frame synchronization can be achieved by detecting frame bytes on data being received at a high speed in the STM-4C structure to align the bytes based on the detected time interval, converting the frame data into the 8-bits parallel data and then detecting, in sequence, the frame bytes at a lower speed clock being divided by 8, thereby providing a simplified, less power consumptive frame synchronizing device in the STM-4C structure according to the ITU-T recommendation.

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patent: 5081654 (1992-01-01), Stephenson, Jr. et al.
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patent: 5136587 (1992-08-01), Obana et al.
patent: 5313500 (1994-05-01), Rikiyama
Choi, DooWhan: "Frame Alignment In a Digital Carrier System -A Tutorial", Feb. 1990, pp. 47-54; IEEE Communicat6ions Magazine.
Xiaokanhg, et al.: "A New Design of the STM-1 Frame Aligner"; 1993, ICC. pp. 11.02.1-11.02.4.

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