Initiative movement prediction assisted adaptive handover trigger scheme in fast MIPv6
Initiative movement prediction assisted adaptive handover trigger scheme in fast MIPv6
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DOI：
10.1016/j.comcom.2012.03.015
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发表时间：
2012-06
期刊：
影响因子：
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通讯作者：
Ming Tao;Huaqiang Yuan;Shoubin Dong;Hewei Yu
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文献类型：
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作者：
Ming Tao;Huaqiang Yuan;Shoubin Dong;Hewei Yu
在为终端用户提供连续性服务时，跨两个相邻接入网络的漫游提出了一个具有挑战性的问题。IETF提出的跨层切换方案FMIPv 6要求及时的链路层（L2）触发来调用上层的切换协议，从而在终止当前无线链路之前完成指定的切换过程。然而，通过实验分析，生成L2触发并不总是优选的。过早的L2触发导致错误警报和不必要的切换操作，具有严重的性能损失和资源浪费。通过分析移动的节点（MN）的移动行为，提出了一种主动移动预测算法来预测MN的移动趋势，并据此提出了一种自适应切换触发机制（IMP-AHT）作为FMIPv 6的补充。IMP-AHT解决了可靠地产生L2触发的合理决策的调查。由于预测过程中不可避免地会引入误差，因此还引入了一些有效的措施来补偿由于错误决策而导致的性能下降。仿真将比较和分析IMP-AHT和FMIPv 6，以评估效率。
Roaming across two adjacent access networks poses a challenging issue in providing continuity services for end-users. FMIPv6, a cross layer handover scheme proposed by the IETF, requires the timely link layer (L2) trigger to invoke the handover protocols of upper layer, the specified handover procedures hence can be completed before terminating the current wireless link. Generating the L2 trigger however is not always preferable by experimental analysis. The premature L2 trigger leads to a false alarm and unnecessary handover operations with serious performance loss and resources waste. By analyzing the movement behavior of the mobile node (MN), an initiative movement predictive algorithm is developed to predict the movement trend of the MN, and an adaptive handover trigger scheme (IMP-AHT) taken as the supplement for FMIPv6 is proposed accordingly. IMP-AHT addresses the investigation on rational decision of generating L2 trigger reliably. Owing to the inevitably introduced errors of the prediction process, some effective measures are also introduced to compensate the degraded performance caused by the false decisions. Simulations will compare as well as analyze IMP-AHT and FMIPv6 to evaluate the efficiency.