We design a novel fuzzy controller to dynamically adjust the packet length to protect against the interference from microwave oven over the IEEE 802.11 FHSS (frequency hopping spread spectrum) wireless LAN card. The idea of adjusting the packet length under the noise environment from the measurement results about the effects of microwave ovens over the wireless LAN card is referred by Lee, Sheu, Chen, Yu and Huaung (see APCC/OECC'99, p.817-820, 1999). Simulation results show that the designed fuzzy controller can effectively improve the transmission performance in terms of network throughput In this paper, we have investigated the effects of microwave ovens over the IEEE 802.11 FHSS (Frequency Hopping Spread Spectrum) wireless LAN card. The measured MAC Frame Error Rate (FER) and UDP Packet Error Rate (PER) are affected by the microwave ovens. From these measurement results we know that the performance of some channels within the IEEE 802.11 FHSS wireless LAN card can be seriously deteriorated. Furthermore, decreasing the packet length would improve the transmission performance from the PER measurement results. Therefore, we design a novel fuzzy controller to dynamically adjust the packet length to against the interference from microwave oven. Simulation results show that the designed fuzzy controller can effectively improve the transmission performance in terms of throughput.
Relation:
全國計算機會議論文集(二)=Proceedings of the 1999 National Computer Symposium ( II )，頁B354-B361
