基于有限状态机的自动切换机制的设计与实现

Design and implementation of Wi-Fi terminal automatic handoff mechanism based on FSM

为应对各种复杂的无线通信环境,如乒乓效应、快速切换、异构网切换等问题,介绍一种基于有限状态机的移动终端自动切换的控制方法,通过记录状态对各种正常以及异常事件的响应,构建完备的有限状态机对终端的切换过程进行自动控制。本文还介绍了自动切换机制在实验网络中的实现过程。结果表明,采用有限状态机控制的切换过程能够很好地处理各种可预见的事件,根据实际情况灵活调节各种参数,提高切换的灵活性和稳定可控性。

In this paper,it was introduced the mechanism of Finite State Machine（FSM） to achieve automatically handoff control of Wi-Fi terminal,so as to cope with problems such as ping pang effect,fast handoff,heterogeneous network handoff,etc.By recording state？s response to the various usual and unusual events,the complete finite state machine was constructed to control the whole process of handoff automatically,a test bed was set up and implemented with the automatically handoff finite state machine system.It was proved that the handoff procedure using FSM could deal with various predictable events and greatly increase robustness,stability and controllability.