Dynamic load tuning for energy-hole avoidance in corona model for a wireless sensor network
Krishna Pal Sharma, Teek Parval Sharma · International Journal of Sensor Networks · 2019
In wireless sensor networks (WSNs), nodes near to sink communicate more than the nodes at farther away from the sink. This load imbalance causes an energy hole around sink and affects overall network lifetime. Therefore, a corona model based approach is proposed to enhance network's lifetime by balancing energy depletion rate across network and avoiding energy hole around sink. The approach balances energy depletion in inter-corona as well as in intra-corona. In inter-corona, the balance in energy depletion rate is achieved by assigning decreasing communication ranges from outermost to innermost coronas whereas in intra-corona, the balance is achieved by dynamically tuning relay load over nodes during data transmission. The relay load tuning considers current relay load and remaining energy of nodes. The proposed scheme works well for uniformly and non-uniformly deployed networks. To validate the results, the approach is compared with baseline approaches through ns-2 based simulation.