Multiplex communications – Data flow congestion prevention or control – Control of data admission to the network
Reexamination Certificate
2007-09-26
2010-06-22
Phan, Tri H (Department: 2471)
Multiplex communications
Data flow congestion prevention or control
Control of data admission to the network
C370S236000, C370S519000, C709S224000
Reexamination Certificate
active
07742415
ABSTRACT:
A determination of latency in IP networks is performed by sensing packets, determining a status of the sensed packets and comparing original packets with acknowledgements (ACKs). A packet header on a physical layer interface (e.g., int 0) is sensed. A determination is made of a sensed packet status. If the packet is sensed, a hashed record of the packet header is created, including a local clock time of when the packet was sensed. A determination is made as to whether the packet represents an ACK to a previously sensed TCP packet. If the packet represents an ACK to a previously sensed packet, a time delay between the previous sensing of the packet and the ACK is calculated. The time delay is the TCP ACK Round Trip Time (TCP RTT).
REFERENCES:
patent: 6442141 (2002-08-01), Borella et al.
patent: 7080160 (2006-07-01), Cognet et al.
patent: 7113485 (2006-09-01), Bruckman
patent: 7289451 (2007-10-01), Bruhn
patent: 7508769 (2009-03-01), Duffield et al.
patent: 7603460 (2009-10-01), Adya et al.
patent: 2005/0068894 (2005-03-01), Yu et al.
patent: 2007/0217343 (2007-09-01), Znamova et al.
Karn & Partridge, 1.0.—TCP Round-Trip Time Estimates, Summary, 3 pages, www.opalsoft.net/qos/TCP-10.htm.
J.Dunn and C. Martin, Terminology for ATM ABR Benchmarking, Memorandum, Jun. 2001, 15 pages, The Internet Society, Ellicott City, MD, www.cse.ohio-state.edu/cgi-bin/rfc/rfc3134.html.
J. Aikat, J. Kaur, F. Donelson Smith, and K. Jeffay; Variability in TCP Round-trip Times, IMC '03, ACM 1-58113-773-7/03/0010, Oct. 27-29, 2003.
Author Unknown; ACE, Analytics for Networked Applications, Product Brochure by OPNET Technologies, Inc., believed to have been first published on the internet Jun. 2007.
Anderson J. Eric
Eppele Kyle
Phan Tri H
The United States of America as represented by Secretary of the
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