Bad RSRQ Dowlink

Hi Everyone,
I’m analizing a specific zone in a mall where there’s a very low RSRQ arround -16dBm.
There is no a very high volume of serving cells so there’s is no pollution.
But most of all have bad values of RSRQ and good values of RSRP.

I have checked RachRootSequence and PCI problems but it don’t seems to be the problem.

RSSI problems only affects to Uplink, right?

Any idea about what else I can check in order to imporve the RSRQ?
Any feature or parametrizaction?

Regards
Have a good day everyone!

Hello,

To understand LTE Signal Strength, see below chart.

It shows what values are considered good and bad for the LTE signal strength values.

image

And here are the meanings of these values (and also RSSI in relation to LTE):

  • SINR/SNR – The signal-to-noise ratio of the given signal.

  • RSRP – The average power received from a single Reference signal, and Its typical range is around -44dbm (good) to -140dbm(bad).

  • RSRQ – Indicates quality of the received signal, and its range is typically -19.5dB(bad) to -3dB (good).

  • RSSI – Represents the entire received power including the wanted power from the serving cell as well as all cochannel power and other sources of noise and it is related to the above parameters through the following formula:

  • RSRQ=N(RSRP/RSSI)*

    Where N is the number of Resource Blocks of the E-UTRA carrier RSSI measurement bandwidth.
    

Hope that helps.

Hi, thanks for your answer.
I would also like to know what are the main reasons for Bad RSRQ values and how to improve them.
Regards
Iñaki