Research And Solution On Channel Merging Collision Problem In The Internet Of Vehicles

Nowadays, road traffic safety has attracted increasing attention. In the Internet of Vehicle environment, how to accurately transmit the traffic information between traffic participants will be a hot research issue.Through a vehicle interactive warning system simulation in the Internet of Vehicles environment and according to its analog communication result. Based on the competition CSMA/CA MAC protocol does not guarantee good communication performance, through the use of thus-based reservation the TDMA MAC protocol can be modified and optimized in these areas. It has been proposed by the TDMA-based ADHOC MAC protocol can be learned, TDMA-based MAC protocol for in-vehicle use more self-organizing networks. However, due to ADHOC MAC protocol is a single-channel protocol, there is a merging collision and hidden terminal problems. A TDMA-based multi-channel MAC protocol--VeMAC protocol is proposed, using location information in accordance with the timeslot allocation approach using the control channel and service channels. That largely extent reduce merging collision and hidden terminal problem. But using VeMAC protocol to transmit the service information between the control channel and the service channel there is a big delay, we propose a protocol VeMAC improvement program, which by adding the flag TF and by using a relay node to optimize the transmission node on the control channel thereby reducing the transmission delay and increase throughput.Through analysis and simulation to verify the feasibility of the improvement program. That the improved scheme is proposed in this paper to reduce the end-to-end transmission delay and improve the throughput, so the proposed scheme is feasible.