Modified Combined LEACH and PEGASIS Routing Protocol for Energy Efficiency in IoT Network

Power limitation in Wireless Sensor Networks (WSN) become one of problems in Internet of Things (IoT) network. Routing protocol being one of many factors that impact power consumption in a node sensor. LEACH protocol is one of a routing protocols in WSN that focused on power consumption in a node sensor. However, Cluster Head (CH) in LEACH protocol forwarding the packet directly to the sink node, so CH which located far from sink node will running out of energy sooner than the closer one. This research develops methods to save power usage from sensor node and to eliminate long link in LEACH protocol so WSN lifetime could be extended. PEGASIS protocol chaining method are adapted to eliminate long link. This method allows CHs to establish chain connection instead of forwarding the packet to sink node directly. The packet will relay forwarded from a CH to other CH up to Leader Node (LN). In this research, LN that elected is CH with the closest distance to sink node. From the simulation results, compared between proposed method with LEACH and PEGASIS. Based on comparison, proposed method had longer lifetime than LEACH protocol. But if compared with PEGASIS, lifetime in proposed method end sooner than PEGASIS. However, unlike PEGASIS proposed method could run in network with many sensor nodes.