基于速度预测的异构网络切换算法

摘要

In this paper, we propose a vertical handover algorithm based on speed prediction for mobility users, such as the scenario of the straight highway. Combining with the dwell time algorithm and the straight road scenario, this paper proposes a handover algorithm based on speed prediction. In this algorithm, speed matrices and the corresponding weight matrices are created. Then through mathematics, the speeds and the next interval position of terminals would be determined. Finally terminals make a handover decision with the dwell time algorithm. The simulation results indicate that, the proposed algorithm would increase the handover times, but effectively reduce the handover latency with the same environment and reliable signal strength, comparing to the traditional dwell time algorithm.%为高速移动的用户提供一种基于速度预测的异构网络垂直切换算法,使用场景如公路的直线路段.根据直线道路场景的特点,结合驻留时间算法设计了一种基于速度预测的垂直切换算法.该算法通过创建速度矩阵以及与速度矩阵相对应的权重矩阵,经过数学运算,求得下一时刻的速度和终端的位置,然后结合传统算法得到切换判决.由仿真得到,在相同的环境及可靠的信号强度下,与经典的算法相比较,新算法虽然增加了切换次数,但有效减少了切换延时.