M-PEGASIS: Energy Efficient Pegasis for Mobile Wireless Sensor Networks

Selem, Enas; Khedr, Ahmed M.; Nassar, Hamed
September 2013
Egyptian Computer Science Journal;Sep2013, Vol. 37 Issue 6, p33
Academic Journal
Recent advances in wireless networks have led to many new protocols specifically designed for wireless sensor networks (WSNs) where energy awareness is an essential consideration. In this paper, we have presented an energy efficient PEGASIS protocol for mobile WSN (M-PEGASIS). The key idea of M-PEGASIS is to form a chain among the sensor nodes so that each node will receive from and transmit to a close neighbor, nodes move according to random way point mobility model, after moving of the nodes, if a node doesn't find a close neighbor it goes into sleep mode for random period of time and then wakes up, this method is repeated until it finds one in its transmission range. This method conserves energy of the mobile nodes. Gathered data moves from node to node, get fused, and eventually a designated node transmit the aggregated data to the base station (BS). Selecting head node is based on both the residual energy of sensor nodes and the distance of each node from the BS. Nodes take turns transmitting to the BS so that the average energy spent by each node per round is reduced. Simulation results show that M-PEGASIS outperforms existing protocols such as LEACH, PEGASIS and LEACH-M in terms of average energy consumed and number of alive nodes.


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