Re:LoRa Range Testing in San Francisco
by hiddenkrypt on Monday September 19, 2016 @03:02PM
(#12533839)
How does this sort of tech handle large scale use? Living in an apartment where all but one corner is in range of 60+ traditional access points has been a huge pain for my connectivity. I can only imagine it would be worse when you're in range of everybody in miles.
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Honestly I am deeper in the stack, in mg understanding however, is the gateway (the thing that receive the radio message) to filter out message belonging to your network. (please note that I may be wrong)
The gateway is extremely simple it receive messages and send them to a bigger server (usually via Ethernet).
Of course the scale of your problem is dependent of the legislation... In Europe (where I work) there is a duty cycle of 1% (if you talk for 1 second you need to don't talk for the next 100 seconds).
Also keep in mind that device usually trasmit at 14 dBm WAY lower than the 27 dBm in the article. Every 3 dBm half the actual power...
It's a great point. A smart network needs to scale down the transmit power of its nodes and gateways as the network density increases.
Hummm actually is more about the distance (in the radio topology) between the nodes and the gateway. Closer are the gateway to the nodes less power you need.
Yes, so if you have a uniform distribution of nodes and gateways over space, a node's nearest gateway gets closer as network density increases.
Definitely, but the philosophy that I usually see is that once your gateway cover an area you may want to add a second one (to cover in case of failure) but no more.
So the distribution is not uniform... On the other way, once an area is covered, more and more nodes are added.