Network element clocking accuracy and stability monitoring...

Details Network element clocking accuracy and stability monitoring... Network element clocking accuracy and stability monitoring...

2011-01-25

2011-01-25

Nguyen, Hanh (Department: 2473)

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

C709S224000, C370S241000

Reexamination Certificate

active

07876792

ABSTRACT:
Various exemplary embodiments include a method and related system and monitoring entity including one or more of the following: generating timing information at a master node in a packet-switched network, the timing information specifying a value of a master clock; communicating the timing information from the master node to a plurality of slave nodes over a first plurality of time-division multiplexing (TDM) pseudowires; running a digital phase-locked loop on each slave node to synchronize each slave node to the master clock, wherein each digital phase-locked loop outputs a frequency at which the respective slave node is operating; sending the frequency outputted by each digital phase-locked loop to a monitoring entity over a second plurality of TDM pseudowires; utilizing the outputted frequencies at the monitoring entity to identify all slave nodes that are experiencing timing problems; and implementing a remedial measure for all slave nodes that are experiencing timing problems.

REFERENCES:
patent: 6351821 (2002-02-01), Voth
patent: 7583705 (2009-09-01), Sinha et al.
patent: 7613212 (2009-11-01), Raz et al.
patent: 7688862 (2010-03-01), Wisler
patent: 7697495 (2010-04-01), Armstrong et al.

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