10K Nodes in a single network

[DD_connectivity]

Hi,

Please help to suggest if 10K Nodes in a single network with 100 Kbps data rate is achievable with data transmission interval being roughly every 30 seconds.

This will be a battery operated device.

Kindly suggest the best possible topology to achieve the same.

Thanks

[AndreasF]

Hi.

10K Nodes in a single network with 100 Kbps data rate

 Is 100 kbps the measured as total for all 10k nodes?

I understand that there is 10000 nodes in a network. Each node wants to transmit once per 30s. How many data bytes do they want to transmit? Which layer are we talking about when referring to "data to transmit"?

A Zigbee network have 250 kbps and can handle over 10k nodes, but you will have a higher probability of address conflicts when commissioning that many nodes.

Best regards,

Andreas

[daviddedwin]

Zigbee will not be able handle a network of the size of 10K nodes.
The only possibility would be use a Bluetooth mesh or a proprietary mesh.

In addition, making the nodes battery operated will bring constraints on its routing capability vs battery life. I think the closest battery operated router will be a zigbee based router, a bluetooth mesh node cannot be a battery operated routing node.

This seems to lean towards a proprietary mesh implementation for these node sizes

Assuming all nodes are transmitting directly to a gateway (no routers), with a packet size of 31 bytes , one transmit every 30 seconds, with a bit encoding of 1Mbps, single rf channel.

31 bytes BTLE standard advertising packet at 1Mbps on air will have a on air occupancy of about 400 us. If we extrapolate this for 10K nodes , this is about 4000ms or about 4 seconds. 
Since we tx every 30 seconds, this is a 14% on air occupancy

This looks fairly possible when the gateway is in direct radio range, the bandwidth for this is about 134kbps in raw bandwidth and a data bandwidth of about 85kbps

I have not adjusted the above results for packet collisions so the effective bandwidth will be worse than the above.

When you add hops to this mesh, I would expect this to deteriorate significantly.

In any case I will have to run this in a simulator to verify the rough results.

Hope this helps.