Patent ID: 6556573
Filing Date: 2003-04-29
Classification: H04J,H04L,H04Q

Abstract:
A method for synchronizing variable bit rate traffic between a source and destination in an Asynchronous Transfer Mode (ATM) network, comprising:designating a variable bit rate ATM Adaptation Layer (AAL) protocol, AAL5, to define ATM cell traffic flow from the source to the destination; encoding a synchronous residual timestamp (SRTS) value indicative of the timing of a source clocking function using one or more sequence numbers and one or more portions of the SRTS value; creating an SRTS field in an AAL5 Common Part Convergence Sublayer Protocol Data Unit (CPCS-PDU) trailer to occupy at least a portion of the SRTS value; creating a sequence number (SN) field in the AAL5 CPCS-PDU trailer to occupy a sequence number corresponding to a sequence and completion status of segmented portions of the SRTS value; transmitting the CPCS-PDU, including the sequence number and the segmented portion of the SRTS value from the CPCS-PDU trailer, using the AAL5 protocol; receiving the ATM cells and corresponding SRTS values at the destination; decoding the SRTS value for use at the destination; and synchronizing a destination clocking function with the source clocking function by modifying the destination clocking function according to the SRTS values.