Effect of Forwarding Strategy on the Life Time of Multi-Hop Multi-Sink Sensor Networks
Lifetime of a sensor network can be extended by judicious energy expenditure. Energy consumed is primarily a function of inter-nodal distance and thus effect of forwarding technique can no longer be overlooked while trying to enhance the lifetime of senso
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Effect of Forwarding Strategy on the Life Time of Multi-Hop Multi-Sink Sensor Networks Kaushik Ghosh and Pradip K. Das
Abstract Lifetime of a sensor network can be extended by judicious energy expenditure. Energy consumed is primarily a function of inter-nodal distance and thus effect of forwarding technique can no longer be overlooked while trying to enhance the lifetime of sensor network. Lifetime of a network has been defined differently in different papers depending upon the nature and application of the sensor network under consideration. In this paper we have proposed a forwarding scheme and have compared the same with greedy forwarding and residual energy based forwarding while finding the lifetime for the sensor network.
Keywords Sensor network lifetime Multi sink Fermat point Residual energy Internodal distance
7.1 Introduction Battery replenishment in sensor nodes of a sensor network has been a matter of great concern due to the nature and deployment scenarios of these networks. Thus, measures are required to be taken to enhance the lifetime of sensor networks instead. Sensor network lifetime is dependent directly upon energy consumption of the network more than anything else. In a sensor network the total energy consumed is a K. Ghosh (&) Department of Computer Science and Engineering, Mody Institute of Technology and Science, Lakshmangarh, Rajasthan, India P. K. Das Faculty of Engineering and Technology, Mody Institute of Technology and Science, Lakshmangarh, Lakshmangarh, Rajasthan, India
V. V. Das (ed.), Proceedings of the Third International Conference on Trends in Information, Telecommunication and Computing, Lecture Notes in Electrical Engineering 150, DOI: 10.1007/978-1-4614-3363-7_7, Springer Science+Business Media New York 2013
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summation of the energy required for: (i) sensing, (ii) processing, (iii) transmitting, (iv) receiving and (v) listening. Of all the components, transmitting and receiving data packets consume the lion’s share of energy as compared to the remaining three taken together. Again, between transmission and reception, the former consumes considerably more energy than the latter. So, in a word we can say that energy consumed during transmission/ reception is the primary determining factor of the life time for any given sensor network. Thus, selecting an energy efficient data forwarding scheme can be one of the ways of enhancing network lifetime in a WASN. Transmitting/receiving energy is again dependent upon inter nodal distance. Energy expenditure of a network increases exponentially with increase in the total distance traveled by data packets. Of the different forwarding schemes, greedy forwarding is widely used in sensor and ad hoc networks. Greedy forwarding performs reasonably well for delay sensitive networks. But in sensor networks topology change is less frequent and even nil at most of the time. So using greedy forwarding as the forwarding technique can lead to energy drainage of certain nodes faster than many of their
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