Replacing HTTP-TCP Traffic Sources with Open-Loop UDP Traffic Sources
نویسندگان
چکیده
The inclusion of Transmission Control Protocol (TCP) is necessary for the realistic simulation of data networks. However, the operation of HTTP-TCP sources puts a heavy tax on the simulations leading to two major scalability problems: the computing resources required by each source put a limit on the total number of sources that can be simulated, and the number of events generated by every simulated connection leads to long simulation times. The problems while addressable for the present day networks become major obstacles for realistic simulations of optical networks. In this paper we present an open-loop traffic source that generates traffic statistically similar to the traffic produced by a number of HTTP-TCP sources. The source is based upon an integrated packet-session levels model that captures the web user-behavior as well as the TCP characteristics. The gain against the scalability problems comes by reducing the required number of sources, and by simulating only the slow-start mechanism of TCP. By comparing key traffic statistics we show that the source qualifies as a good candidate for generating network traffic.
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