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Node lifetime is an important metric for communication in networks. However, node lifetime is still severely restricted by the limitations of power supply. In this paper we propose a new algorithm Save Energy and Maximize Connectivity (SEMC) that economizes the energy and keeps connectivity between the nodes, By varying the transmission range and respecting the behavior of node (mobility), the energy consumption will be considerably reduced and the connectivity can be continually preserved. The advantage of SEMC indeed that it is generic and it can be used by all MANET routing algorithms such as AODV and DYMO. Results obtained by SEMC are compared with those produced by IEEE 802.11g. We implement the SEMC algorithm using the NS-2 simulator and perform an extensive experimental evaluation of several important performance measures with a focus on energy consumption and connectivity, Our findings indeed dernonstrate that SEMC achieves significant improvements in node's lifetime and communication in the network.

Saving Energy and Maximizing Connectivity by Adapting Transmission Range in 802.11g MANETs