Congestion control in data networks

Details Congestion control in data networks Congestion control in data networks

2004-04-21

2008-07-01

Shah, Chirag G (Department: 2619)

Multiplex communications

Data flow congestion prevention or control

C370S235000

Reexamination Certificate

active

07394762

ABSTRACT:
Disclosed are methods of congestion control in transmission of data in packets over a network link using a transport layer protocol, and transmission methods and protocol systems to implement such methods. The number of unacknowledged packets in transit is less than or equal to a congestion window value cwndiwhich can be varied according to an additive-increase multiplicative-decrease (AIMD) law having an increase parameter αi. In embodiments, αican be increased during each congestion epoch at a time after the start of a congestion epoch, or based on time since the start of a congestion epoch. In embodiments, a multiplicative decrease parameter βican be set based on a characteristic(s) of a data flow(s) carried over the network link. For example, the value of βimay be set as the value of the round-trip time of data traversing the link or based on the minimum of the mean inter-packet time.

REFERENCES:
Sally Floyd, Mark Handley and Jitendra Padhye, “A Comparison of Equation-Based and AIMD Congestion Control”, ACIRI, May 12, 2000, pp. 1-4□□.
M. Allman, V. Paxson and W. Stevens, “TCP Congestion Control”, Apr. 1999, The Internet Society (1999), p. 2.
Dang-Hai Hoang and Dietrich Reschke, “TCP-friendly Exponential Congestion Control for Multimedia Communication”, 2002, IEEE, p. 1589□□.
Wang, Ren, et als., “TCP Startup Performance in Large Bandwidth Delay Networks,” Computer Science Department, University of California, Los Angeles, CA 90095. 2004.

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