A minimum delay link scheduling algorithm in vehicular ad-hoc networks

Reducing the information transmission delay in the Vehicular Ad Hoc Networks(VANETs) can improve the timeliness of receiving information and avoid the happening of the accident. As a potential solution, cooperative transmission, which may effectively reduce the transmission delay by exploiting spatial diversity, has attracted lots of attentions recently. In this paper, we modeled the information transmission delay minimization of the VANETs in which cooperative transmission is allowed, and proposed a gradient projection algorithm based on the model. The RSU can schedule the vehicle transmission behavior according to the algorithm, so as to solve the problem of the information transmission delay minimization in the VANETs where multipath routings(MRTDM) are considered. Finally, our simulation results show that the algorithm not only has good convergence, but also can solve the MRTDM in VANETs.