How do I calculate throughput for a BLE Mesh?

[Ildar]

Good day!

How can I calculate the maximum throughput for BLE Mesh running on the nRF52832 and the S132 without packet loss in ideal conditions?

I have tested throughput in BLE Mesh SDK v0.9.1 between two nodes and I was disappointed in very bad results.

Regards

[bjorn-spockeli]

What were your results and could you describe the test setup, i.e. advertisement interval , the number of nodes etc? The maximum payload is 11bytes and the latency per hop without any packet loss is (2ms + Advertising_Interval)/2 * no_of_hops. Based on that we should be able to calculate a theoretical value.

[ianwirght]

The spec states that the frequency which a node can transmit messages should not more than 24 Hz. But Nordic allows developer to set the adv interval for 20ms. The maximum payload is 11bytes. Your can calculate the throughput by yourself.

[ianwirght]

the formula is used for latency, right?

[bjorn-spockeli]

Yes, that is correct.

[Hadi Deknache]

Hi,

I have implemented a function for sending a message over mesh to a server node in the network, and now want to measure the throughput. I am having a hard time telling what size of the data that are sent. Let's say that I send a message by using access_model_publish method with data that is 8 bytes big(e.g."HiServer"), should I calculate the throughput based on 8 byte or the whole packet? E.g. 8 bytes * 8 / time_seconds. I am calculating the throughput like this right now and get a very low throughput around 400-500 bps? Am I doing something wrong? When reading the specifications, ideal throughput would be 1mbps, or am I wrong?

Would be thankful for any kind of help