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Self‐adaptive clock frequency recovery based on buffer control
Author(s) -
Lu Yueming,
Ji Yuefeng
Publication year - 2012
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.1243
Subject(s) - arithmetic underflow , computer science , network packet , multiplexer , real time computing , convergence (economics) , clock drift , clock recovery , computer network , digital clock manager , multiplexing , clock synchronization , jitter , clock signal , clock skew , telecommunications , economics , programming language , economic growth , channel (broadcasting) , synchronization (alternating current)
SUMMARY With high‐speed packet networks and packet transport networks (PTNs) beginning to support transmissions of high‐speed time division multiplex and multiplexer (TDM) and 3G services, the clock recovery in packet networks becomes significant and challengeable. This paper proposes a self‐adaptive clock frequency recovery based on buffer control to support the clock recovery in packet networks. It includes an estimation part and an amend part, estimates clock frequencies using the dynamic moving average algorithm, amends clock frequencies according to feedbacks, and balances stability, convergence, and system faults. Simulations show that the method has the ability of self‐adaption, avoids the buffer overflow and underflow, and achieves better accuracy, less packet delay, as well as better convergence ability. Copyright © 2011 John Wiley & Sons, Ltd.