Waiting time jitter reduction by synchronizer stuffing threshold

Details Waiting time jitter reduction by synchronizer stuffing threshold Waiting time jitter reduction by synchronizer stuffing threshold

1995-09-05

1996-10-08

Kizou, Hassan

Multiplex communications

Wide area network

Packet switching

3701053, 370112, 375372, 375376, H04J 307, H04L 7033

Patent

active

055638910

ABSTRACT:
A system and method are disclosed for reducing waiting time jitter in a pulse-stuffing multiplexer of a communications network. The data of a lower rate signal, that is plesiochronous with a higher rate signal into which the lower rate signal is to be multiplexed, is written into an elastic buffer in accordance with a write signal that is derived from the data of the lower rate signal. The data is read out of the elastic buffer in accordance with a read signal which is locally generated. A comparison circuit forms the phase difference between the write and read signals. A justification circuit generates a justification signal with pulses corresponding to the instances where the phase difference exceeds a dynamically randomly varying threshold. The pulses of the justification signal, in turn, regulate the reading out of the data of the lower rate signal from the elastic buffer.

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W. Grover, T. Moore & J. McEachern, Waiting Time Jitter Reduction by Synchronizer Stuff Threshold Modulation, Proc. of GLOBECOMM, pp. 13.7.1-13.7.5 (1987).

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