Max LoRaWAN nodes per gateway

[Nicola Mondello]

Hi all,
how can I calculate the max number of LoRaWAN nodes can be connected to a Conduit (MTCDTIP-H5-220L-868-OP)?

[Jason Reiss]

Is this for a gateway forwarding packets to a remote central network server?
Or a gateway using the embedded network server?

For a remote central network server receiving packets from the gateway there is no limit as the nodes are not connected to the gateway. Any packet that is received will be forwarded. Gateways can be added to the system to increase capacity.

The limit in the network is a number of packets that can be received and transmitted by the gateway. Each 8-channel gateway listens up to 50 virtual channels when datarate and frequency are combined. On these 50 virtual channels up to 8 packets can be received simultaneously.

There is also a limitation in the number of bytes available in the receive buffer. So if max length packets are being received only 3 such packets would be received.

With the 868 conduit used in EU there is also a limitation of duty-cycle, but again this limits the number of packets not nodes.

Here are a couple links to papers and discussions about lorawan capacity.
https://blog.semtech.com/understanding-the-lorawan-capacity-whitepaper
https://arxiv.org/pdf/1607.08011.pdf

In the other case of an embedded network server on Conduit, up to 2000 end-device can be connected.

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