Recently I'm doing a project about broadcast my location infos (latitude, longitude, bearing and speed) from gps module in smartphone, then ppls or drivers who are closer to each other could get the distance and avoid the collision(actually part of the VANET). I waa use the Wi-Fi Direct to broadcast these infos without establishing coections among the devices. Just fill the infos into the name of Wi-Fi Direct ssid and change it when gps data changes. Then a problem occurs that the delay is really long. When I switched on the Wifi Direct of one device, another one could find it after about 1 second. However it’s not enough when comes to the vehicular network. This problem became more terrible when changing the device name periodically. If anyone can tell me whether this method is feasible to do the collision avoidance job or not? If there are some better ways using android smartphones? Thanks a lot!
