Using Mobile Sink and Agent Nodes to Mitigate Sub-Energy Holes Problem in Event-Driven WSN

Abstract

The sensor nodes around the sink will consume more energy to forward data frequently. That is, the sensor nodes will run out of energy rapidly, then causes the energy hole problem. Deploying the agent nodes around the sink can improve the energy hole problem. However, the outer sensor nodes still transmit data to the sink frequently, they consume excessive energy and lead to the sub-energy hole. We proposed a mobile sink and agent nodes mechanism to solve the sub-energy hole problem. It can reduce the route distance to the sink and the power consumption of specific SNs; hence, extend the lifetime of WSN. Keywords: Wireless sensor network, sub-energy hole, mobile sink, mobile agent node, network lifetime.