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Real-Time Network Emulation with ns-2 | IEEE Conference Publication | IEEE Xplore

Real-Time Network Emulation with ns-2


Abstract:

The network simulator ns-2 implements both wireless networks and emulation — a feature that allows to simulate a network environment among real stations. However, the rea...Show More

Abstract:

The network simulator ns-2 implements both wireless networks and emulation — a feature that allows to simulate a network environment among real stations. However, the real-time requirements of a network emulation introduce an inaccurate timing behavior of the simulator scheduler. These timing errors have a negative impact on the performance of network protocols in ns-2. Even more, they lead to false simulation results in the IEEE 802.11 protocol implementation. In this paper we present performance improvements in ns-2, that increase the accuracy of its virtual clock and the the exactness of the real-time simulation. Then we describe a simple time monitoring and correction technique that ensures a timely correct execution of network protocols and enables wireless network emulation in ns-2.
Date of Conference: 21-23 October 2004
Date Added to IEEE Xplore: 13 December 2004
Print ISBN:0-7695-2232-7
Print ISSN: 1550-6525
Conference Location: Budapest, Hungary

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