考虑负载均衡和用户体验的垂直切换算法

在超密集异构无线网络中，针对城区交通高峰期，大规模车载终端短时间聚集性移动引起的网络拥塞问题，该文提出一种考虑负载均衡和用户体验(LBUE)的垂直切换算法。首先，引入网络环境感知模型预测网络未来的拥塞程度，并提出一个融合自组织网络的网络架构，缓解网络拥塞。其次，定义业务适应度和负收益因子，并提出一种基于秩和比(RSR)的自适应切换判决算法，为用户筛选出当前环境下满意度最高的目标网络。实验结果表明，该算法能够有效降低终端接入网络的阻塞率和掉话率，实现网络间负载均衡并提升用户体验。

Vertical Handoff Algorithm Considering Load Balance and User Experience

In ultra dense heterogeneous wireless networks, a vertical handoff algorithm considering Load Balancing and User Experience (LBUE) is proposed to solve the problem of network congestion caused by large-scale mobile terminals clustering in short time in urban traffic peak. Firstly, the network environment perception model is introduced to predict the future congestion degree of the network, and a network architecture integrating self-organizing network is proposed to alleviate network congestion. Secondly, the business fitness and negative return factor are defined, and an adaptive handoff decision algorithm based on Rank Sum Ratio(RSR) is proposed to screen out the most satisfactory target network for users in the current environment. Experimental results show that the algorithm can effectively reduce the blocking rate and call drop rate of terminal access network, achieve load balancing between networks and improve user experience.