Hi,
1. In what range of rsrq, nRF9160 can be stably connected to the network?
2. In what range of rsrp can nRF9160 be stably connected to the network?
3. Which parameter is more important, rsrq and rsrp?
4. When I actually tested the customer board and the development board, the rsrq fluctuated between 18 and 28, what caused it?
Thank you for all your assistance.
Kind regards,
Peter.Min
Hello,
2. In what range of rsrp can nRF9160 be stably connected to the network?
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.
1. In what range of rsrq, nRF9160 can be stably connected to the network?
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.
3. Which parameter is more important, rsrq and rsrp?
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.
4. When I actually tested the customer board and the development board, the rsrq fluctuated between 18 and 28, what caused it?
That could be caused a lot of things. Did you also see a fluctuation in RSRP?
Hello,
2. In what range of rsrp can nRF9160 be stably connected to the network?
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.
1. In what range of rsrq, nRF9160 can be stably connected to the network?
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.
3. Which parameter is more important, rsrq and rsrp?
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.
4. When I actually tested the customer board and the development board, the rsrq fluctuated between 18 and 28, what caused it?
That could be caused a lot of things. Did you also see a fluctuation in RSRP?
