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Abstract
Ad hoc wireless network is a self configurable infrastructure less network. The lack of infrastructure support in ad hoc networks makes them useful in various applications such as at the disaster site, highway, vast forest, battle field, oceans, etc. Since there is no centralized control in ad hoc network, each node can act as a source, a destination or a router. Ad hoc wireless networks therefore, experience congestion more than the wired networks, leading to jitter and high end to end delays even for moderate traffic which may lead to performance degradation. So it is crucial to analyze the factors which affect the capacity and end-to-end delay in wireless ad-hoc networks. In this paper a G/G/1queuing network model is proposed togain insights into the end-to-end delay in a multi hop wireless ad hoc networks. Queuing network model is unique as it providesclosed form expressions for average end-to-end delay in multihop wireless ad hoc networks. NS2 simulation is conducted in order to verify and compare the theoretical results.
Highlights
LITERARY SURVEYPrevious work on the capacity of wireless ad hoc networks is found in [2], [6], [7], [11], [12], and [14]-[17]
Ad hoc wireless networks are becoming more and more popular nowadays
The authors modeled the service time of a node in wireless ad hoc network based on IEEE 802.11 MAC as a Markov modulated general arrival process and the resulting M/MMGI/1/K queuing model is used for analyzing the delay over a single hop in the wireless network in reference paper [9]
Summary
Previous work on the capacity of wireless ad hoc networks is found in [2], [6], [7], [11], [12], and [14]-[17]. In reference paper [16] the authors examine the ad hoc forwarding and IEEE 802.11 MAC interactions and they examine the effect on capacity for several topologies like chain, uniform lattice, single cell and random networks They obtained an estimate of the expressions for one-hop capacity and upper bound on per-node throughput using simulated results. The authors modeled the service time of a node in wireless ad hoc network based on IEEE 802.11 MAC as a Markov modulated general arrival process and the resulting M/MMGI/1/K queuing model is used for analyzing the delay over a single hop in the wireless network in reference paper [9]. The prior work [6]-[17] has not been extended to two dimensional wireless networks
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