Apparatus and method for limiting jitter in a telecommunications

Details Apparatus and method for limiting jitter in a telecommunications Apparatus and method for limiting jitter in a telecommunications

1994-06-03

1996-06-18

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370105300, 375371, H04J 307

Patent

active

055285988

ABSTRACT:
In a system where jitter in a first telecommunications signal (e.g., TUG-3) which is being mapped into a second telecommunications signal (e.g., STS-3C) is reduced by moving the TUG-3 pointer in the opposite direction of the pointer movement of the STS-3C signal, and by suspending FIFO measurement from the time of the STS-3C pointer movement until the next TUG-3 stuff or destuff, the improvement is in further limiting jitter by moving the measurement points for the TUG-3 FIFO measurements without conducting TUG-3 pointer movements when the TUG-3 pointer movement would otherwise be moved into or over the transport overhead of the TUG-3 signal. The TUG-3 pointer movement is held in abeyance until two additional pointer movements in the same direction are received, and then the jump is made. During that time however, the measurement points for the TUG-3 FIFO depth measurements are moved by a byte each time the TUG-3 pointer movement is received. After three pointer movements in the same direction, the TUG-3 pointer and the FIFO depth measurement location are again coincident.

REFERENCES:
patent: 5014271 (1991-05-01), Fujimoto et al.
patent: 5131013 (1992-07-01), Choi
patent: 5210745 (1993-05-01), Guinand et al.
patent: 5287360 (1994-02-01), Regent
patent: 5331641 (1994-07-01), Parruck et al.
patent: 5343476 (1994-08-01), Urbansky
patent: 5361263 (1994-11-01), Urbansky

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