Latency evaluation in a ring network

Details Latency evaluation in a ring network Latency evaluation in a ring network

2006-09-26

2006-09-26

Nguyen, Brian (Department: 2616)

Multiplex communications

Diagnostic testing

Determination of communication parameters

C370S516000

Reexamination Certificate

active

07113485

ABSTRACT:
A method for measuring latency in a bi-directional ring network includes transmitting a latency measurement packet from an originating node to a peer node and noting a time of receipt of the packet at the peer node. The packet is then transmitted back to the originating node in the opposite direction, while recording in the packet an indication of a peer node difference between a time of transmission of the packet from the peer node to the originating node and the time of receipt of the packet at the peer node. A time of return of the packet to the originating node is noted, so as to determine an originating node difference between a time of transmission of the packet from the originating node to the peer node and the time of return of the packet to the originating node. The latency is calculated by taking a difference between the originating node difference and the peer node difference.

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D. Tsiang et al., Request for Comments (RFC) 2892 of the Internet Engineering Task Force (IETF), Aug. 2000.

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