- Fluid-Flow Modeling of a Relay Node in an IEEE 802.11 Wireless Ad-Hoc Network
- Lecture Notes in Computer Science
- Pages (from-to)
- Document type
- Faculty of Science (FNWI)
- Korteweg-de Vries Institute for Mathematics (KdVI)
Wireless ad-hoc networks are based on shared medium technology where the nodes arrange access to the medium in a distributed way independent of their current traffic demand. This has the inherent drawback that a node that serves as a relay node for transmissions of multiple neighboring nodes is prone to become a performance "bottleneck". In the present paper such a bottleneck node is modeled via an idealized fluid-flow queueing model in which the complex packet-level behavior (mac) is represented by a small set of parameters. We extensively validate the model by ad-hoc network simulations that include all the details of the widely used ieee 802.11 mac-protocol. Further we show that the overall flow transfer time of a multi-hop flow, which consists of the sum of the delays at the individual nodes, improves by granting a larger share of the medium capacity to the bottleneck node. Such alternative resource sharing strategies can be enforced in real systems by deploying the recently standardized ieee 802.11e mac-protocol. We propose a mapping between the parameter settings of ieee 802.11e and the fluid-flow model, and validate the fluid-flow model and the parameter mapping with detailed system simulations.
- Proceedings title: Managing Traffic Performance in Converged Networks
Place of publication: Berlin/Heidelberg
Editors: L. Mason, T. Drwiega, J. Yan
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