Overload control method for a packet-switched network

Details Overload control method for a packet-switched network Overload control method for a packet-switched network

2006-06-27

2006-06-27

Yao, Kwang Bin (Department: 2667)

Multiplex communications

Data flow congestion prevention or control

Flow control of data transmission through a network

Reexamination Certificate

active

07068606

ABSTRACT:
The invention relates to a method for controlling overload in a packet-switched network, especially in a network where the Transmission Control Protocol (TCP) is used as the transport layer protocol. In order to inform the traffic source at a very early stage that the network is getting overloaded or congested, the transmission of acknowledgments traveling towards the source is only allowed if enough tokens are available. A token-based mechanism calculates the number of tokens on the basis of resource conditions such as a spare forward buffer capacity in a network node. Thereby, a threshold for a buffer occupancy or a rate for delaying the acknowledgments do not have to be determined. The acknowledgments are constrained closely related to the current network resource and not to the characterization of the data traffic. As a result, the overload control is significantly robust.

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“Improving TCP Performance in ATM Network by the Fast TCP Flow Control,” International Conference on Communication Technology, ICCT '98, Oct. 22-24, 1999, Beijing China, pp. S46-07-1 through S46-07-5.

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