• deepak v biradar
• Dr. Nataraj K R

As the technology grows low cost and low power multi functional sensor nodes have gained more attention in the field of wireless sensor networks (WSN). WSN is used in various applications like battlefield monitoring, detection of Enemy vehicles and environment surveillance. In most of the applications energy consumption is the main constraint, the more amount of time nodes are used in data transmission process they eventually become dead and this becomes very critical for Network to function and destroys Network Lifetime (NL). The paper commences by giving brief overview of various NL maximization techniques and sink relocation plays a vital role in improving NL. The survey is extended by an improvement to existing Sink Relocation techniques in the following manner a) Classification of Neighbour Nodes into Healthy Nodes and Non Healthy Nodes b) Picking the Forward Node which is healthiest and closer to destination c) Trigger the Dead Node Recovery Process at regular intervals. d) Making use of MIMO techniques for data rate improvement.

Wireless Sensor Network; Energy Dissipation; Residual energy

"Review of Energy Efficient and Network Lifetime Improvement Approaches in Wireless Sensor Networks ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 12, page no.273-290, December-2018, Available :http://www.jetir.org/papers/JETIR1812941.pdf

"Review of Energy Efficient and Network Lifetime Improvement Approaches in Wireless Sensor Networks ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 12, page no. pp273-290, December-2018, Available at : http://www.jetir.org/papers/JETIR1812941.pdf