基于MPLS的软件定义车联网主动式故障恢复机制

Proactive Restoration Mechanism of Software Defined Internet of Vehicles Based on MPLS

在软件定义车联网(SDIV)通信场景中,链路故障快速恢复是保证车端信息服务质量的关键技术之一。为此,提出一种基于MPLS的主动式故障恢复机制。在发生链路故障时,由故障链路上游交换机将备份路径信息封装至数据包头的MPLS标签中,转发过程中交换机匹配数据包头MPLS标签中信息进行转发;同时,考虑链路负载、可用带宽等性能指标,周期性地为拓扑中的每条链路更新备份路径。实验结果表明,与现有方法相比,所提机制有效降低了备份路径流表存储开销、数据丢包数量和恢复时延,可实现面向车端信息传输链路故障的快速恢复。

In software defined Internet of vehicles(SDIV) communication scenario,link fault fast recovery is one of the key technologies to ensure the quality of service.Therefore,in this research,we examine a mechanism of proactive link failure recovery based on MPLS.When link failures occur,the switch upstream of the fault location packages the backup path information to the MPLS label in the packet header of flow that suffers the failure.During the forwarding process,the switch matches the information in the MPLS label in the packet header and forwards packet according to the backup path information.In addition,the backup path is periodically updated for each link in the topology,with performance indexes such as link load and available bandwidth in consideration.The experimental results show that the proposed mechanism can significantly reduce the overhead to build and maintain,the number of data packets lost and the recovery delay,and can realize rapid multi-link fault recovery.