Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Patent
1997-11-04
2000-08-29
Vu, Huy D.
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
370252, 370516, 370518, 375372, 375376, G01R 3108, H04J 306, H04L 2536
Patent
active
061118788
ABSTRACT:
052440872 An existing synchronous residual time stamp (SRTS) algorithm (76, 78, 80, 82, 106, 104) is used in conjunction with adaptively filtered buffer fill information (74) to reconstruct an original constant bit rate (CBR) payload clock rate (102) for asynchronous transfer mode (ATM) CBR payloads (88, 96). The SRTS time stamp (96) is used as the primary factor used to recover the payload clock rate, but a secondary payload frequency correction factor (112) is generated by filtering (118, 120) the desynchronizer buffer fill position. This correction factor is determined as part of a feedback arrangement which adaptively (128) alters the filtering time constant based on the offset position of the buffer from its center. In this way, payload clock frequency (102) is corrected, even in the presence of loss of synchronization PRS traceability between mapping and desynchronizer nodes to keep the desynchronizer buffer from overflowing.
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Alcatel
Phan M.
Vu Huy D.
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