基于环境感知与MIH的无缝切换优化研究  

Research on Optimized Seamless Handover Using Context-aware and MIH

作　　者：李红亮[1] 宋建新[1] 

机构地区：[1]南京邮电大学图像处理与图像通信实验室,江苏南京210003

出　　处：《电视技术》2012年第5期90-94,共5页Video Engineering

摘　　要：网络多样化已经是当今接入网的一大特点,完成各种网络的准确切换和会话连续性保障是其中关键的两项。IEEE802.21框架能够保证移动终端(Mobile Node,MN)在多网络中自由移动,然而保证切换过程中QoS连续性仍是需要解决的问题。针对切换过程中的这两个要求,提出动态阈值和被动资源预留方法保证准时切换和会话连续性,通过仿真可以看到相对传统的固定阈值和无资源预留方法的情况,该方法对切换连续性有一定的改善。That various networks is the main character of today＇ s access network, the handover instant and keeping session continuity are two key fac- tors. The IEEE 802.21 framework enables MNs to freely move in multiple networks. However, supporting QoS service continuity remains as a problem to be solved. In this paper, an adaptive handover threshold and passive reservation is proposed to solve these issues , they can keep seamless handover well. The simulation result shows that this method performances well with traditional threshold and un-passive resource with IEEE 802.21 framework.

关 键 词：环境感知 垂直切换 动态阈值 被动资源预留 MIH 

分 类 号：TN92[电子电信—通信与信息系统]