RE: NBIoT Timers

Panagiotis Galiatsatos — Mon, 26 Oct 2020 06:22:52 GMT

Hello Carl!

Thank for your response.

I will contact my network operator and I will be back!

Kind regards,

Panos.

RE: NBIoT Timers

Carl Richard — Fri, 23 Oct 2020 07:06:29 GMT

Hello, Panagiotis!

1. You are correct that PTAU is disabled. This does in fact mean that the device was not granted PSM, and will thus not enter PSM. Which SIM-provider are you using and can you confirm that they support the PSM feature?

2. The idle period your are seeing is indeed the RRC Inactive Timer described in the posts you linked, and it is, as you say, given by the network operator. There is unfortunately no way to read this value yet, but your network provider should know which parameters they provide. Capturing a transmission, like you have done here, is also a viable way of determining the timer parameters. We have an online power profiler for LTE where you can read more about the different parameters and see how they affect the device.

I suggest that you ask your network operator about the XRAI feature aswell, as it's not neccessarily supported.

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I would like to see these things change for the better so that it will be easier for developers to predict the behavior of their devices, but alas, we're not there yet.

Best regards,
Carl Richard