Method for determining round trip time utilizing ATM traffic management mechanism
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United States of America Patent
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Aug 13, 2002
Grant Date -
N/A
app pub date -
Jan 11, 1999
filing date -
Jan 11, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of measuring the Round Trip Time (RTT) if a Virtual Circuit (VC) utilizing the Traffic Management mechanism of ATM. The RTT is measured in real time individually for each new opened VC and/or for existing VC routes in the network. In addition, the RTT measurement method of the present invention can be used to determine the CRM parameter for a VC on an end to end basis, e.g., user to user or LEC to LEC, so as to achieve better performance of the network. The invention comprises a first embodiment that utilizes the SN field of a RM cell in measuring the RTT and a second embodiment that does not utilize the SN field in measuring the RTT. In addition, an application of the method is presented in determining the CRM parameter within the TM descriptor.
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