Re: [Roll] [roll] #105: trickle-mcast: how to determine scope of MPL domain

[peter van der Stok <[e-mail]>]

Hi Michael,

sorry to be confusing.

Again, this is not a real installation, just an example of what to 
expect.
Surface area can be something like 100x30 square meters.

I show 6 border routers coinciding with 6 disseminatiuon areas due to a 
remark by Dario where he asked if it is possible that multiple 
disseminations areas can be present in one PAN.
The answer is yes, because giving a border router to each dissemination 
area (6) is quite expensive.

Concerning the use of the same channel.
When we have one PAN, one channel is used, that is clear.
Having several PANs, it perspires that often only 2 channels of the 
ones specified by 802.15.4 provide good communication ([presence of 
802.11, etc.).

Several other additional organisational boundary conditions can dictate 
the channel numbers.

Hope this helps,

peter


Michael Richardson schreef op 2012-11-12 23:07:
> splitting up your text to emphasize a few things:
>
>>>>>> "peter" == peter van der Stok <[e-mail]> writes:
>     peter> The nodes in all networks use the same communication 
> channel.
>
> ...
>
>     peter> not forward the message.  In this network configuration 
> the
>     peter> dissemination area is identical with a network.  From a 
> cost
>     peter> perspective (less border routers) it is more realistic if 
> one
>     peter> network covers the whole floor.
>
> But, in your diagram, you have 6 border routers?!?
>
> I don't understand why nodes in area1 and area2 should use the same
> communication channel.