关键词: 移动互联网络,异构网络切换,动态负载均衡,松耦合模式,模糊数学 中图法分类号TP393.03文献标识码A

Abstract: Load balance in heterogeneous wireless networks is one of the key technologies to enhance service quality of networks．Most existing load balance mechanisms do not take the difference of personalized business demand of users for network resources into account,and moreover,lack a satisfaction guarantees mechanism．To address this problem,a novel dynamic load balance in advance mechanism based on end-user service awareness was proposed．At first,a fuzzy mathematics model was introduced to achieve access expectations with respect to each candidate network of terminal．On this basis,the services of mobile end-user in current network could be transferred to low resources congestion rate and high exceptions access network selectively,in full consideration of the congestion status of these candidate network resources,such that local hot-spots could be alleviated,as a result to enhance the resource utilization efficiency and improve user satisfactions．Simulations demonstrate that the proposed mechanism achieves significant performance improvement,in terms of access point load,as well as congestion avoidance and user network experiences.

Key words: Mobile network,Heterogeneous network handoff,Dynamic load balancing,Loose coupling,Fuzzy mathema-tics