A message efficient intersection control algorithm for intelligent transportation in smart cities

IoV based traffic control at intersections has been recently studied widely to realize intelligent transportation. However, existing solutions usually suffer from high communication cost, which may cause serious packet interference and long time delays. In this paper, we design a new algorithm to realize intersection control via vehicular ad hoc networking. We basically adopt the approach of mutual exclusion, which can let vehicles at an intersection compete for the privilege of passing via message exchange. Different from existing works, we adopt a group based privilege competition design. By letting only group head handling requests from other lanes, message cost can be significantly reduced. Reducing communication cost is a significant issue in IoV based intersection control because high communication cost will cause packet interference and packet losses, which further result in safety problems. The key challenges lie in deterring group size and recognizing group head. Compared similar works, our new algorithm can conduct intersection control with much less message cost, and its advantage is validated by simulations using ns3.