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CC1352P7: Wi-SUN maximum network size

Georg Lippitsch
Prodigy 110 points
Part Number: CC1352P7
Other Parts Discussed in Thread: CC1314R10, CC1354P10

Hello,

reading documentation about TI's Wi-SUN FAN implementation, it looks like the network size is limited to around 100 devices when using the CC1352P7 as border router. We are currently working on a project where we have to bring at least 500-1000 devices online. So I would like to know:

  • Is there a way to connect more than 100 devices to a network? If the CC1352P7 can't do it, is there any other SoC suitable for that purpose?
  • When using multiple border routers to form multiple networks, is there a way to automatically distribute nodes among those networks? Or do they have to be assigned manually to each network, for example by specifying PanID or Network Name?

Thanks!

Georg

  • 0
    TI__Guru* 81751 points

    Hi Georg,

    The network size is limited by the BR device. On CC1352P7 it's the RAM limiting the size of the routing table which gives the limit of around 100 devices.

    You can find other BR devices in the market that supports larger networks. From TI side, the largest network we support is 300 devices using a CC1314R10 or CC1354P10 as the BR.

    When you set up your RN, you can decide whether you want to assign a specific PAN ID or allow it to connect to any PAN ID.

    Cheers,

    Marie H

  • 0 in reply to Marie H
    Prodigy 110 points

    Hey Marie,

    thanks for your reply! Though it's still a bit unclear to me what would happen if there are multiple border routers in the same location. Would the router nodes randomly choose to which router they connect? And if so, would that lead to an even distribution of nodes between networks, or could it happen that some routers overload more quickly than others?

    And also what happens if a router reaches the limit of 100 devices? Will new devices just not connect, or will it also affect performance of the devices already in the network?

    Thanks!

    Georg

  • +1 in reply to Georg Lippitsch
    TI__Guru* 81751 points

    Hi Georg,

    If the RNs are programmed to accept any PAN ID, they would connect to whichever BR they found first. 

    When the BR does not have room for more devices in the routing table, it will simply not allow any new devices to connect. This should not affect the network performance.

    Cheers,

    Marie H