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Traditional power data transmission schemes based on GSM (Global System of Mobile Communication), GPRS (General Packet Radio Service) or ZigBee cannot work well in some bad circumstances because of low QoS (Quality of Service) in terms of low data rate, weak signal strength, high cost, short distance and limited coverage. In this paper, an effective and reliable power data transmission scheme based on smart antenna WLAN (Wireless Local Area Networks) technology is developed to solve these problems. In the proposed scheme, various power data in power systems such as current, voltage and power factor obtained by power data sensors are collected by the wireless CPEs (Customer Premise Equipment), and then transmitted to the switches in a wireless mesh or bridge network formed by smart APs (Access Point) with smart antennas, and eventually to the host sever through optical fibers. In order to evaluate the performance of this scheme, a scenario test was conducted in a practical and complicated electricity environment, in which the RSSI (Received Signal Strength Indicator), the time delay and the throughput were measured and compared with traditional APs without smart antennas. Our analysis and results have demonstrated that the proposed scheme can provide high QoS and guarantee the power data to be transmitted effectively and reliably even though in bad circumstances

An Effective and Reliable Power Data Transmission Scheme Based on Smart Antenna WLAN Technology