一种基于移动趋势量化的多属性垂直切换判决算法

摘要

由于对终端移动趋势的不明确，基站容易盲目发起切换，并导致较高的切换失败率。该文在LTE-WiMAX网络构成的异构无线网络环境下对现有的垂直切换算法进行了优化。该优化算法考虑了终端移动趋势，利用趋势量化参数来推断终端最终的目标区域，解决已有判决算法中存在的不必要切换过多的问题，提高切换成功率。在衰落信道下的计算机仿真结果表明，该优化算法可以减小切换中的切换失败率，从而提高网络的切换性能。%The base station will initiate handoff blindly and cause high failure rate of handoff if the knowledge of the terminal,s motion trend is absent. An optimized algorithm is proposed to optmize existing vertical handoff algorithm in the LTE-WiMAX heterogeneous wireless network system. The proposed algorithm uses the motion trend quantification to estimate goal cells and restrict unnecessary handoff so as to increase success rate of handoff. The computer simulation results in fading channel show that the optimized algorithm can reduce the failure rate of handoff during the handoff process and enhance the handoff performance of network.