Improvement of Directed Diffusion Protocol Based on Data Aggregation

How to make full use of the limited energy available and prolonging the survival time of node is a major concern in research on wireless sensor networks (WSNs). This paper presented an improved approach based on directed diffusion protocol (DDP) which could meet the features of WSN, such as data-oriented, many-to-one transmissions and low energy costs, together with data aggregation mechanisms which emphasized on cascading timeouts, to eliminate the redundancy caused by the transmission of large amounts of data. This modified protocol prohibited the direct forwarding of central nodes, balancing data traffic of different sensors between the source and the sink, and proved to be able of reducing total network flows, energy consumptions and prolonging the lifetime of the network through simulations.