An adaptive medium access control scheme for mobile ad hoc networks under self-similar traffic |
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Authors: | Mamun Abu-Tair Geyong Min Qiang Ni Hong Liu |
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Affiliation: | (1) Institute of Telecommunications Management, National Cheng Kung University, No. 1 University Road, Tainan City, Taiwan |
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Abstract: | An important function of wireless networks is to support mobile computing. Mobile Ad hoc NETworks (MANETs) consist of a collection
of mobile stations communicating with each other without the use of any pre-existent infrastructure. The self-organization
characteristic of MANETs makes them suitable for many real-world applications where network topology changes frequently. As
a result, the development of efficient MAC (Medium Access Control) protocols in MANETs is extremely challenging. Self-similar
traffic with scale-invariant burstiness can generate bursty network loads and thus seriously degrade the system performance.
This paper presents an adaptive MAC scheme which dynamically adjusts the increasing function and resetting mechanism of contention
window based on the status of network loads. The performance of this scheme is investigated in comparison with the legacy
DCF (Distributed Coordination Function) under self-similar traffic and different mobility models. The performance results
reveal that the proposed scheme is able to achieve the higher throughput and energy efficiency as well as lower end-to-end
delay and packet drop probability than the legacy DCF. |
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