Improving Energy Efficiency and Throughput in Heterogeneous Mobile Ad Hoc Networks

Improving Energy Efficiency and Throughput in Heterogeneous Mobile Ad Hoc Networks

Manu J. Pillai, M. P. Sebastian
Copyright: © 2011 |Pages: 13
DOI: 10.4018/978-1-60960-563-6.ch003
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Abstract

The nodes are expected to transmit at different power levels in heterogeneous mobile adhoc networks, thus leading to communication links of different length. Conventional MAC protocols that unconditionally presume that links are bi-directional and with unvarying energy distribution may not succeed or execute badly under such circumstances. Interference and signal loss resulting out of distance and fading diminish the entire throughput attained in heterogeneous networks to a greater extent. This article presents a MAC protocol, which adaptively transmits data frames using either the energy efficient nodes or a list of high data rate assistant nodes. In addition, a cross-layer based energy level on-demand routing protocol that adaptively regulates the transmission rate on basis of congestion is projected as well. Simulation results illustrate that the proposed protocols considerably diminish energy consumption and delay, and attain high throughput in contrast with the Hybrid MAC and traditional IEEE 802.11 protocols
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An alternate methodology to collision resolution in a CSMA protocol with the introduction of spatial back off was projected by Charles J. Colbourn et al. (2007). They illustrate that collision resolution with the aid of power back off can be extremely successful, outperforming IEEE 802.11 in both static and mobile ad hoc network situations. Nevertheless, these results are obtained on basis of an optimistic centralized power-aware routing strategy and not the distributed power-aware strategy. Aran Bergman et al. (2006) projected a novel utility function which reflects the tradeoff amid the energy consumption brought about by à MAC protocol and its throughput, thereby representing the energy efficiency of the algorithm. They alter the ‘‘0.487’’ algorithm to enhance its energy efficiency.

A new routing protocol called multiclass (MC) routing, which is exclusively designed for heterogeneous MANETs, was presented by Xiaojiang et al. (2006). A new medium access control (MAC) protocol for heterogeneous MANETs, which is more proficient in comparison with the IEEE 802.11b, was introduced as well. Nevertheless, the necessity of information from various layers make the selection of a node which has larger transmission range (power) and data rate, better processing capability, and more reliable and robust than the other type a complicated one.

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