Study On Energy-efficient Routing Protocol In Wireless Sensor Networks

At present, wireless sensor networks (WSNs) have attracted the academia and industry. WSN becomes a new hot field of The Internet of things, and it will have a tremendous influence in this century. Routing is a serious issue in WSN due to the use of computationally-constrained and resource-constrained sensor nodes. A rational routing algorithm can efficiently reduce and balance the energy consumption of WSN nodes, and can achieve longer network lifetime and higher network performance. Therefore, designing an energy-efficient routing protocol for WSN has an important significance both to theory and practice.It deeply studied and analyzed the existing WSN routing protocol. For the hierarchical routing protocols, it focuses on the representative protocol: LEACH (Low-Energy Adaptive Clustering Hierarchy). Based on the previous research, it proposed a new improved scheme LEACH-E for LEACH, which includes the improved calculation for threshold and data transmission. NS simulation results show that: compared with LEACH, LEACH-E gains a better adaptability, a more balanced energy consumption of nodes, and a longer survival time.It proposed a new flat routing protocol SEBR (Simple And Energy Balancing Routing In Wireless Senor Network) for WSN. SEBR is a simple, energy-efficient routing protocol with one-level data aggregation. It described SEBR from the following four aspects: Initialization process, forwarding data packets, data aggregation and failure tolerance. SEBR was compared with DD and MCF through performance analysis and NS simulation, and it can be observed that SEBR outperformed them in throughput, latency, average energy consumption and average network lifetime.