RE: case about rsrq rsrp

peter.min — Fri, 10 Feb 2023 08:03:07 GMT

Hi Hakon,

Thank you for all your assistance.

You've solved most of my questions

RSRP is 79/80.

Kind regards,
Peter.Min

RE: case about rsrq rsrp

Hakon — Tue, 07 Feb 2023 16:33:00 GMT

Hello,

[quote user=""]2. In what range of rsrp can nRF9160 be stably connected to the network? [/quote]

You can find this in the Product Specification, under receiver sensitivity;

Also useful is https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/ltem-vs-nbiot-field-test-how-distance-affects-power-consumption, where RSRP is plotted until the connection is lost.

[quote user=""]1. In what range of rsrq, nRF9160 can be stably connected to the network? [/quote]

It depends on the RSRP;

The equation for LTE RSRQ is defined below:

RSRQ = RSRP/ (RSSI/N)

Where N is number of resource blocks over which RSSI is measured. RSSI is calculated as a linear average of the total power measured across OFDMA symbols which contain reference symbols transmitted from first antenna port, e.g. symbols 0 and 4 when MIMO is not used.

[quote user=""]3. Which parameter is more important, rsrq and rsrp? [/quote]

I don't know which one is more important, but RSRP is probably more practical to use. As mentioned earlier, RSRQ is calculated from RSRP.

[quote user=""]4. When I actually tested the customer board and the development board, the rsrq fluctuated between 18 and 28, what caused it?[/quote]

That could be caused a lot of things. Did you also see a fluctuation in RSRP?