Power-Aware: An Optimal Energy Efficient Communication Scheme Using AODV Protocol in MANETs

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Santhosh Reddy Tirumuru
Sakthi Ganesh . M


In wireless mobile ad hoc network (MANET) using a shared communication medium, every node receives or overhears every data
transmission happening in its neighbourhood. However, this technique is not appropriate when a power saving mechanism (PSM) such as the
one specified in IEEE 802.11 is working, where a packet advertisement period is alienated from the actual data transmission period. When a
node receives an advertised packet that is not destined to it, it switches to a low-power state during the data transmission period, and thus,
conserves power. However, since some MANET routing protocols such as Dynamic Source Routing (DSR) collect route information via
overhearing, they would suffer if they are used with the IEEE 802.11PSM. Allowing no overhearing may critically deteriorate the performance
of the underlying routing protocol, while unconditional overhearing may offset the advantage of using PSM. This paper proposes a new
communication mechanism, called Random Cast or Rcast, via which a sender can specify the desired level of overhearing in addition to the
intended receiver by using(Adhoc On-demand Distance Vector) AODV protocol. Therefore, it is possible that only a random set of nodes
overhear and collect route information for future use. Rcast improves not only the energy efficiency, but also the energy balance among the
nodes, without significantly affecting the routing efficiency.



Keywords: Energy balance, energy efficiency, mobile ad hoc networks, overhearing, power saving mechanism.


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