Abstract
为了有效地管理和利用异构网络无线资源，为用户提供更高的服务质量，提出了一种基于SINR和滞留时间的垂直切换算法。首先通过香农定理确定SINR和最大数据速率的关系，再利用这个关系得到不同网络中的等效SINR，然后通过移动终端的运动规律对滞留时间进行估算，若终端的SINR在滞留时间内都满足某个网络中的判决条件，则执行切换。仿真结果验证了此算法的可行性和有效性。In order to effectively manage and utilize wireless resources of heterogeneous network and provide a higher quality of service for the user, a vertical handoff algorithm which based on SINR and dwell time is proposed. First, the relationship between SINR and the maximum achievable data rate can be determined with the help of Shannom’s capacity theorem. And then the SINR can be converted to the equivalent value in the different networks and the dwell time can be estimated from the moving regulation of the mobile terminal. If the SINR meets the conditions in all the dwell time, handoff happened. The feasibility and validity of the algorithm was confirmed by the simulation.
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