Firechat / Wireless mesh networks

Soldato
Joined
6 May 2009
Posts
20,362
Due to the recent protects in Hong Kong I decided to research Firechat and subsequently how Wireless Mesh Networks work.

The only thing I remembered about mesh network was that it was a type of topology I learned many moons ago at college (along with bus, star, ring and token from memory)

Anyway, I got reading http://computer.howstuffworks.com/how-wireless-mesh-networks-work.htm and it looks like a mesh network uses nodes in wireless radio frequencies that are also used in wireless devices (like phones)

Just a couple of questions

1. If Wifi is switched off on mobile device, how does the 802.11a/ b/ g still stay working? Is it just radio signal parts of the wifi that stay on, but actual wifi searching/connecting is turned off

2.
In a wireless mesh network, only one node needs to be physically wired to a network connection like a DSL Internet modem

If no nodes are connected to the internet, I take it that the network still works but nothing will be updated with any outside data. I.e a Firechat 'nearby' group can chat to all nearby nodes but that's it - no communications from anywhere else?
 
Yep, tested at work and it uses bluetooth. (not some magical communication method i originally thought!)

It doesnt say anything about the app using bluetooth in the description but as soon as you turn it off you can no longer talk to people nearby
 
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