Channel Access Priority for Vehicle Intersection Collision Warning

We propose an intersection warning channel access priority (IWCAP) protocol to warn drivers of a possible collision when approaching an intersection. Our protocol operates via inter-vehicle communication (IVC) networks with one omni directional antenna per vehicle and one dedicated short range communication (DSRC) channel. The advantage of our protocol is that it can be used as an optional add-on medium access mechanism to the IEEE 802.11a MAC protocol. We describe in details the operation of our protocol and show the performance analysis in terms of latency, bandwidth, the required communication range and the required distance to an intersection to avoid a collision.