Analog network coding interference mitigation methods for wireless sensor networks

A wireless sensor network (WSN) may interfere with the coexistent network when it plays a part in environmental monitoring, clinical care and so on. For the sake of interference mitigation, a cooperative analog network coding (CANC) technique is studied in the heterogeneous WSN. Furthermore, an optimal algorithm named S-CANC is proposed by combining the source node selection and CANC to minimize the interference brought by WSN. The closed-form expressions of outage probabilities for CANC, S-CANC and cooperation are derived respectively to evaluate the impact of interference on the coexistent network. Simulation results show that the outage probability of existing network is largely reduced by the proposed protocols. And these protocols have better stability and performance than cooperation.