关键词: 异构无线网络, 介质独立切换, 垂直切换, 增强信息, 动态更新机制, 参数估测

Abstract: Aiming at the problem of independent handover latency, this paper proposes a handover mechanism based on enhance information service. By the function expansion of the information services entity, it defines enhanced information content and update mechanism, and according to the proposed channel parameter estimation algorithm, selects the target access point quickly and accurately. Simulation results show that, with selecting reasonable distance threshold, mobile node can achieve high handover hit rate by more than 90% without scanning candidate target networks.

Key words: heterogeneous wireless network, media independent handover, vertical handover, enhanced information, dynamic update mechanism, parameter estimation