Has anyone designed a peer-to-peer communications networks system, which works almost like the internet, but wirelessly? I mean a system, which:
- you can connect the transmitter to an usb port and operate it with a laptop
- can be used to transmit data (for example, text messages)
- units will connect automatically to nearest units of same system, and generate a routing table, and therefore you can send your message anywhere in the network, so that other units will relay your message forward until it reaches its destination.
- The transmit power should be couple of watts (to get a range of couple of kilometers/miles per station) and the frequency band should be some legal band for free use (27 MHz, for example).
A purpose for this kind of device would be estabilishing a communications system in an area facing a natural disaster or to help people communicate in countries where government censorship prohibits using the internet.
As an electrical engineer, I know that this kind of system:
- is possible to build
- and the most hard part is to develop the protocol (communicating between two units is trivial, but how to get the message through multiple stations to its destination).
But has anyone done it yet?