voice transmission over ad hoc [duplicate]

Question

Possible Duplicate:
why there is a need to have voice - ad hoc network in inter vehicle communication system rather than using a “typical radio transmitter & receiver”

we are looking to develop a voice transmission system using WiFi in ad hoc networking mode...

To mention exactly, we are trying to develop inter-vehicle communication system ( voice). How could I manage to use WiFi in ad hoc mode without having any routers in it.. [ we'd like to transfer voice ]..

Suppose we made this one: Say in a close vicinity, we are having 3 vehicles so, If one transfers some voice-data, does all get this in their systems ?

How could I possibly do this ?

Answer 1

WiFi Ad-Hoc is usually used to connect two computers together to form a temporary network without any infrastructure like routers and wireless access points.

Getting it to work with multiple stations and without manual interaction is not really possible without extensive hacking and re-writing of code.

What you are looking to do has already been done and there are already specifications and standards for this.

It's called an InVANET - Intelligent Vehicular Ad-hoc NETwork - and is designed specifically to allow any vehicles within range to talk to each other without any manual intervention.

The communication specification is 802.11p which is not the same as WiFi which is 802.11a/b/g/n (n is still only draft).

Once you have the network in place transmitting voice can be done in many ways. The network, if done properly, will be an IP network, so anything that can transmit across the Internet can transmit across the InVANET - including multicast messages (see mbone for example).