Hierarchical Role-based Data Dissemination for large-scale wireless sensor networks with mobile sinks

In this paper, we propose a Hierarchical Role-based Data Dissemination approach, named HRDD, for large-scale wireless sensor networks with multiple mobile sinks. In HRDD, we use a hierarchical cluster-based structure to discover and maintain the routing paths for distributing data to the mobile sink. We assign two roles, named Indexing Agent and Gateway Agent, to some sensor nodes in the wireless sensor networks. Indexing Agents are used to remove unnecessary query messages, while Gateway Agents contribute to decrease energy consumption and the broadcasting messages. We evaluate and compare the impact of the number of nodes with prior approach. The simulation results justify that HRDD has the capability to reduce the energy consumption in the wireless sensor networks and to prolong network lifetime.