Energy-Efficient Cross-Layer Design of Cooperative MIMO Multi-Hop Wireless Sensor Networks Using Column Generation

摘要

Cooperative Multiple-Input Multiple Output (MIMO) schemes are recently shown to be able to reduce the transmission energy in distributed wireless sensor networks (WSNs). With the merit of the MIMO schemes, we study the joint routing, scheduling and stream control problem with the aim of minimizing energy consumption while satisfying a given end-to-end traffic demand in scheduling-based multihop WSNs. We present a cross-layer formulation of the problem by incorporating various power and rate adaptation schemes, and taking into account an antenna beam pattern model and the signal-to-interference-and-noise constraint at the receiver. In this context, we also propose a column generation solution to get rid of the complexity of having to enumerate all possible sets of scheduling links. The formulation is verified by simulation experiments, and the results show its effectiveness in both energy saving and QoS provisioning.