基于传感器移动探测的Wi-Fi热点切换优化算法

With the development of Wi-Fi(Wireless Fidelity) technologies, an increasing number of mobile users get Internet Services through Wi-Fi AP during moving. Handover between Wi-Fi APs needs scheems. The default handover schemes based on RSS (Recvived Signal Strength) can cause Ping-Pong effect and other bad networking performance. An Android Sensor Frame assisted handover scheme is proposed in this paper. The scheme take the advantage of accelerometer sensor and orientation sensor supplied by Android sensor frame to detect user's movement which can help to advoid Ping-Pong effect during staying in the zone where signal overlay. At the same time, the new scheme will begin to handover when detecting the current connecting Wi-Fi AP's RSS is similar to the alternate AP's. And when there are more than one alternate AP to handover, the scheme will choose the one whose signal increases fasetest than any other one to handover. At the end, through a set of experiments, the results show that the new handover scheme can effectively solve the Ping-Pong effect and bad Internet perfomence in the zone where signal overlay.