Destuffing control by modifying detected pointer with differenti

Details Destuffing control by modifying detected pointer with differenti Destuffing control by modifying detected pointer with differenti

1992-04-24

1994-04-12

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

370112, 375112, H04J 306

Patent

active

053032420

ABSTRACT:
In a digital communication system where a received stuff-synchronized TDM signal is demultiplexed into data signals each containing a sequence of frames. Each frame contains a pointer to indicate the start timing of the frame and specify positive, negative or zero destuffing. A pointer is detected from each data signal and compared with a previous pointer of the data signal stored in a memory. From this comparison the type of destuffing to be performed on a frame is determined, and in response to it, +1, -1 or 0 is added to the previous pointer to produce a current pointer, which is then used to rewrite the previous point. A binary block count value is generated by a single phase counter and compared with the current pointer to generate a start-of-frame signal if it equals the current value.

REFERENCES:
patent: 4658152 (1987-04-01), Walters
patent: 4811340 (1989-03-01), McEachern et al.
patent: 4935921 (1990-06-01), Ishizaki et al.
patent: 5020057 (1991-05-01), Taniguchi et al.

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