Energy AwareHybrid PUSH-PULL for Data Diffusion in Sensor Networks

Abstract

In Wireless Sensor Network (WSN), sensornode is limited in energy, thus energy efficiency is animportant concern in routing protocol design. And someapplications in sensor networks have the requirement oftimely delivery, real-time also become needed for routing.Directed diffusion is a classic data-centric routing protocolin Wireless Sensor Networks (WSNs). In the directeddiffusion, the path reinforcement scheme is designed forminimum delay and maximum data received during acertain period of time. However, the communication costand energy balance over the whole WSNs have not beenpaid enough attention. Hybrid PUSH-PULL data Diffusion(LOHD) is a data dissemination algorithm for data-centricsensor networks. Despite of two Push and Pull routingalgorithms that work well when there are a few sourcesand sinks, respectively. LOHD works well in a wide rangeof networks and source/sink settings. It adaptively selectsan ultra-node through a well-controlled flooding and theultra-node maintains the gradients from sources to sinks.In this paper we improved this algorithm with consideringenergy parameter in order to extend the lifetime of thesensor network. The simulation results show that ourproposed protocol that we call it ELOHD, is outperformdirected diffusion in energy efficiency, energy balance overWSNs, and network lifetime.