Performance Improvement of ZigBee Networks in Coexistence of Wi-Fi Signals
Atefesadat Seyedolhosseini, Nasser Masoumi, Mehdi Modarressi · 2017
In this paper, the performance of ZigBee networks in presence of Wi-Fi interference is evaluated. ZigBee networks performance is adversely affected by Wi-Fi signals, since Wi-Fi channels overlap with ZigBee. Besides, power consumption of nodes is also increased, mainly due to the need for retransmission of dropped packets. In this paper, in order to take this issue into account, optimum distance between nodes in ZigBee networks in coexistence of Wi-Fi signal is extracted theoretically; the formulation is based on Signal Interference Noise Ratio (SINR) and is used to improve network efficiency by lowering the data failure rate. Moreover, a new routing methodology is also presented for ZigBee networks when Wi-Fi sources are around. The routing method combines the normalized value of Link Quality Indicator (LQI) and conventional topological metrics to reduce Packet Error Rate (PER) and Bit Error Rate (BER), while keeping the packet path as short as possible. Simulation results shows that the proposed methods can improvement the total network performance considerably.