面向用户体验和速度感知的垂直切换判决算法

Vertical handoff decision algorithm towards user experience and speed perception

为了保证用户会话的连续性,面向星地一体化网络,提出一种基于用户体验的切换判决算法.选择具有最小用户体验差异度的网络作为目标切换网络,使得每个用户接入到最合适的网络;采用模糊数学方法设计速度感知模块,降低高速移动体的切换次数.仿真证明,基于用户体验和速度感知的切换判决算法可以降低切换失败概率和呼叫阻塞率,同时保持较高的网络平均负载,使得更多的用户可以被网络服务,具有在全网资源分配方面的优势.

A user-experience-based handoff decision method towards Integrated Satellite and Terrestrial Network （ISTN） is proposed to guarantee the user session continuously. It selects the network with the lowest user experience difference, so each user can access to the most appropriate network. Meantime, a speed perception module is designed based on fuzzy method for the purpose of decreasing handoff times with high mobility. Simulation performance proves the superiority in reducing the probability of handoff failure and new call blocking. Moreover, the system can maintain a higher average network load to serve more users, which indicates the superiority of resource allocation among the whole network.