Jorj - 'It may simply have been a case of the lesser of all of the evils.'
I think you have hit it, exactly.
I have already run into evidence of contention issues elsewhere. A while ago, this:
'Other devices may also use the frequency band. CEO Jyrki Larilahti from KPNQwest Finland (another ISP concentrating on business customers) reports that they used the 2,4 GHz frequency in Norway and that e.g. ship radars sometimes resulted in crashed connections in a whole town.'
Message 13964264
What does this say about a wireless LAN set up in, say, New York city, where you have repeated sweeps by radar from harbour surveillance, weather surveillance, and ships?
WRT Bluetooth, frequency-hopping, spread spectrum, and packet header collisions, there is likely a probability of collisions that would increase as a function of density/usage.
The question is, at what point would these collisions, microwave ovens, vacuum cleaners, and miscellaneous other RF devices cause the whole wireless LAN to be junked?
A concurrent question is: when does the strength of the RF signal (in a LAN, for example) reach a point where it renders interference to be a non-issue?
To illustrate, I draw from Frank's ham operator example; a loud, clear message can override hundreds of simultaneous background messages simply because it is loud and clear. This could relate to ISM transmissions in the sense that signal strength could also mitigate some of the anticipated problems. Is this true?
Anyway, I'm far from convinced that this problem is a non-event.
Regards,
Jim |
