The mobility of nodes in MANET may result in dynamic topology with high rate of link breakage and network partitions leading to interruption in communication and packet loss. Many routing protocols have been proposed in the literature with different characteristics and properties. The routing protocols suffer from various overheads causing energy loss which is further aggravated by link breaks. The present work concentrate on the energy consumption issues of routing protocols. We have evaluated the performance of DSDV, DSR and AODV routing protocols with respect to energy consumption indicating their usage of node's energy.

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An accelerating energy crisis in the oil and gas industry is driving development and investment in Mobile Ad Hoc Network technologies. The mobile ad hoc network (MANET) is a self-configuring infrastructure-free network of mobile devices connected by wireless links; it is essentially a temporary wireless network which users who are willing to communicate form and who subsequently use multi-hop peerto-peer routing to provide the network connectivity. The nodes in MANET being mobile may result in dynamic topology with a high rate of link breakages and network partitions leading to an interruption in the ongoing communication. The link breaks in MANET routing protocols are significant contributor of energy consumption. In order to reduce the cost incurred in tackling the link failure, a routing protocol avoiding route breaks based on Dynamic Source Routing (DSR) has been proposed. The proposed energy aware efficient DSR (EAEDSR) considers the link and node stability to determine preemptive metric. The protocol's performance is found to be promising.

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As we know that in a Mobile Adhoc Network [MANET], mobility is the very important factor. Mobility gives the flexibility to the node to move in the coverage area. Here, in MANET multiple mobility models are proposed and every model provides different mobility and Quality of Service (QoS) support to the nodes. In this paper, we will present a study on these mobility models and its effects on QoS support in MANET and important findings.