车载网移动切换方案

Mobility Hand off for Vehicular Networks

提出了一种车载网移动切换方案。该方案中,路面移动节点由其家乡IPv6地址唯一标识,在移动过程中无需转交地址。此外,该方案采用预移动切换机制,即在二层移动切换之前进行三层移动切换,在预移动切换过程中路面移动单元(OBU)仍然与当前关联的接入节点(AP)链路相连,当前关联的AP能够将目的地址为OBU的数据转发给OBU。因此,预移动切换机制降低了数据丢包率,缩短了移动切换时间,确保了通信的连续性。通过对性能参数进行分析,结果表明该方案的移动切换代价更小,移动切换延迟更短。

The paper proposes a mobility handoff scheme for vehicular networks. In this scheme, a mobile node is uniquely identified by its home IPv6 address. In addition, this scheme uses an advanced mobility handoff mechanism. The mobility handoff in the network layer is performed before the one in the link layer is done. Therefore, the AP can forward the data destined for the onboard unit to the onboard unit. Therefore, the advanced mobility handoff mechanism reduces the packet loss rate, shortens the mobility handoff delay, and ensures the communication continuity. The performance parameters of this scheme is analyzed and compared, and the results show that the mobility handoff cost of this scheme is smaller and the mobility handoff delay is shorter.