Hello,
I am looking at the Quectel_RG50xQRM5xxQ_Series_AT_Commands_Manual_V1.2 documentation to see which RSSI, the number of resource blocks (RBs), the transport block size (TBS), and uplink metrics can be accessed.
Is there a way to read the RBs or TBS using AT commands?
Since I did not find them, I tried to use ‘RSSI’ to calculate an approximation for RBs using using the ‘3GPP TS 36.214 version 14.2.0 Release 14’ document which says I need RSSI for this calculation.
For example, it is possible to read ‘RSSI’ in LTE and EN-DC modes under ‘5.20. AT+QENG Query Primary Serving Cell and Neighbour Cell Information’. However, there is no ‘RSSI’ metric for 5G SA connections.
Another example is that it is possible to read ‘NR_DL_bandwidth’ for 5G SA connections under ‘5.20. AT+QENG Query Primary Serving Cell and Neighbour Cell Information’. However, there is no corresponding ‘NR_UL_bandwidth’ field. In LTE mode, there are fields for ‘UL_bandwidth’ and ‘DL_bandwidth’.
Is it possible to access uplink modulation, too?
Are these limitations of 3GPP specification or the modem itself?
Best,
Birkan