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Priority to TW93103683ApriorityCriticalpatent/TWI256807B/en
Publication of TW200529608ApublicationCriticalpatent/TW200529608A/en
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Publication of TWI256807BpublicationCriticalpatent/TWI256807B/en
Synchronisation In Digital Transmission Systems
(AREA)
Abstract
The present invention provides a transmission clock control method for TDM data over Ethernet. The method employs a reference transmission time as the reference time spent in the transmission of TDM data via an Ethernet network in a TDMoE system. The reference transmission time is long enough for handling Ethernet packets with various delays. The method checks if there exists an error between the reference transmission time and the actual time spent in the packet transmission via the Ethernet network every predetermined period, and adjusts the TDM clock of the destination side according to the error. When the buffer of the destination side gets empty, the method also calculates a new reference transmission time for performing above check subsequently. By applying the method, which also takes Ethernet packet delay into consideration, a buffer with proper size is used and the TDM clock of the destination side is adjusted, thereby eliminating the TDM clock jitter of the source side.
TW93103683A2004-02-172004-02-17Transmission clock control method for TDM data over ethernet
TWI256807B
(en)