A Solution for Mobility Management in Software Defined VANET

Abstract

With the development of urban intelligent transport system, new challenges are posed for the exchange of information during vehicle movement in the Vehicle Ad Hoc Network (VANET). One critical challenge of today's VANET is how to provide high quality network services with lower packet loss rate and delay in the scenario of frequent movement and handover. Previous work most either focused the mobile management on selecting a fixed point or dynamically select different forwarding points. Unfortunately, most of these solutions cause triangle routing problems or generate a lot of signaling overhead. They overlooked the balance of dynamic routing and signaling overhead. In this paper, we propose a scheme that uses a dynamic repeat point selection algorithm in the VANET architecture, reusing part of the switch's flow tables as much as possible to save signaling cost and reducing handover delay. Extensive experimental results show that this scheme saves signaling overhead during handover, reduces handover delay and the loss rate of data packets.