"... method is feasible to do the collision avoidance job or not?"
Probably NOT. Consider vehicles travelling in opposite directions on a two lane road. Even with perfect instantaneous communications between any two oncoming vehicles, the inaccuracy in smartphone GPS position (lat, lon) of roughly 3 meters in good circumstances, would mean that your project would likely be reporting incorrectly, that nearly every passing vehicle was going to be involved a head on collision. To have any confidence in your project smartphone GPS position would need to be accurate to within 10 centimeters or less. On Saturday, July 2, 2016 at 12:47:52 PM UTC+10, 吴梦飞 wrote: > > 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 wanna use the Wi-Fi Direct to > broadcast these infos without establishing connections among the devices. > Just fill the infos into the name of Wi-Fi Direct ssid. 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! > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+unsubscr...@googlegroups.com. To post to this group, send email to android-developers@googlegroups.com. Visit this group at https://groups.google.com/group/android-developers. To view this discussion on the web visit https://groups.google.com/d/msgid/android-developers/ebf2a9e8-6423-4fc0-8bd8-1ef00be33768%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
