Stochastic Delay Bound for Heterogeneous Aggregation in Sensor Networks

Strict delay performance guarantees are required by many applications in wireless sensor networks. Different from traditional approaches, the data aggregation and the stochastic characteristic need to be considered for the delay analysis in sensor networks. In this paper, the problem that how to calculate the stochastic delay bound under different aggregation schemes is solved with the stochastic network calculus. Meanwhile, to support multifunction in sensor networks, the impact of the heterogeneous services is brought into the analysis of the stochastic delay bound. From some numerical evaluations and the simulation, it is shown that a good tradeoff between performance and implementation can be achieved with a comprehensive aggregation scheme.