Delay aware energy-efficient opportunistic node selection in restricted routing

Mobile sink can implicitly provide uniform energy consumption across sensor networks and load-balanced data delivery by alleviating the sensor data disruptions and hotspot problems. Advertisement of mobile sink's current position in ring routing introduces control packet overhead in terms of energy consumption and leads to shorter network lifetime. In order to minimize this overhead, we have exploited the functionality of ring nodes rather than anchor nodes for the advertisement of mobile sink's current position and forwarding the aggregated data towards mobile sink. In this paper, we propose a novel, distributed, Delay Aware and Energy-Efficient Opportunistic Node Selection in Restricted Routing (DA-EEORR) protocol, suitable for delay-sensitive applications. Based on asynchronous working-sleeping cycle of sensor nodes, our proposed scheme utilizes the concept of opportunistic connection random graph in ring routing for selection of next-hop using optimal link and path connectivity in restricted search space. Our simulation results reveal that proposed scheme outperforms the existing benchmarks i.e., hierarchical mobile sink routing schemes in terms of control packet overhead, network lifetime, energy consumption and packet delivery ratio.