Enhanced Fast Handover for Network Mobility in Intelligent Transportation Systems
Enhanced Fast Handover for Network Mobility in Intelligent Transportation Systems
复制标题
增强智能交通系统中网络移动性的快速切换
DOI：
10.1109/tvt.2013.2272059
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发表时间：
2014
影响因子：
6.8
通讯作者：
Ji
中科院分区：
文献类型：
--
作者：
Seonggeun Ryu;Kyung;Ji
为了维护智能交通系统(ITSS)中一组节点的Internet连通性，对网络移动基础支持(NEMO BS)协议进行了标准化。NEMO BS通过移动路由器(MR)为移动网络中的移动网络节点(MNN)提供移动性。由于NEMO在切换过程中的丢包率随着MNN数量的增加而急剧增加，因此采用移动IPv6快速切换(FMIPv6)来减少丢包和切换时延。然而，由于FMIPv6最初是为单个移动节点(MN)设计的，基于NEMO的FMIPv6(FNEMO)在旧的和新的接入路由器(分别是PAR和NAR)之间的链路上产生了很高的隧道负担。在本文中，我们提出了一种增强型fNEMO(EfNEMO)作为一种有效的快速切换方案，该方案显著降低了隧道传输负担和切换时延。具体地，EfNEMO执行临时绑定更新(BU)过程，以在层2切换之前向MR的归属代理(HA)注册MR的新转交地址(NCOA)。因此，EfNEMO通过HA和NAR之间的各种路径传递目的地为MNN的分组，而无需任何隧道。此外，EfNEMO减少了切换延迟，因为它提前向HA进行注册。通过建立EfNEMO的解析模型，研究了NEMO、FNEMO和EfNEMO的切换性能。此外，我们还比较了EfNEMO与NEMO和fNEMO在总体开销和切换时延方面的差异。还进行了仿真，以便在更逼真的环境中进行比较。分析和仿真结果表明，EfNEMO的性能明显优于fNEMO和NEMO。
To maintain the Internet connectivity of a group of nodes in intelligent transportation systems (ITSs), the network mobility basic support (NEMO BS) protocol was standardized. The NEMO BS provides mobility for mobile network nodes (MNNs) in a moving network through a mobile router (MR). Since packet loss in NEMO dramatically increases during a handover as the number of MNNs increases, Mobile IPv6 fast handovers (FMIPv6) was adopted to reduce packet loss and handover latency. However, since FMIPv6 was originally designed for a single mobile node (MN), FMIPv6 based on NEMO (fNEMO) incurs a high tunneling burden on the link between the previous and new access routers (PAR and NAR, respectively). In this paper, we propose an enhanced fNEMO (EfNEMO) as an efficient fast handover scheme that significantly mitigates the tunneling burden and handover latency. In particular, EfNEMO performs a tentative binding update (BU) procedure to register a new care-of address (NCoA) for the MR with the MR's home agent (HA) before the layer-2 handover. Consequently, EfNEMO delivers packets destined for MNNs via various paths between the HA and the NAR without any tunneling. Furthermore, EfNEMO reduces handover latency because it performs the registration to the HA in advance. By establishing an analytical model for the proposed EfNEMO, we investigate the handover performance of NEMO, fNEMO, and EfNEMO. In addition, we compare EfNEMO with NEMO and fNEMO in terms of the overall cost and the handover latency. Simulation is also performed to compare in a more realistic environment. The results of analysis and simulation show that EfNEMO significantly outperforms fNEMO and NEMO.