On Tue, Jun 09, 2020 at 08:50:10AM +1000, Nick wrote:
> Hi Walter,
> 
> I???m seeing a similar issue with my RM500Q-GL.  Can you please post the 
> output of: qmicli -p -d /dev/cdc-wdm0 --dms-get-band-capabilities
> 
> Mine below for your reference.  You would note on mine, after the Extended 
> LTE bands, where we would expect to see the 5GNR band TLV response, that it 
> is absent. (Thanks to Sebastian for showing me that.)  However, I am 
> currently not attached to a 5G network, nevertheless, when I attempted this 
> test while attached to a 5G network, I had the same result.
> 
> 
> Best,
> Nick
> 
> 
> When I was on 5G
> ---------------
> AT+QENG="Servingcell"
> +QENG: "servingcell","NOCONN???
> +QENG: "LTE","FDD",505,01,8B45502,349,1300,3,5,5,700B,-83,-10,-53,20,0,-150,-
> +QENG: ???NR5G-NSA???,505,01,45,-32768,-32768,-32768 (note the negative 
> values for signal, equivalent to 0b1000000000000000)
> --------------
> Responses for AT+QENG 5GNR: Access Tech, MCC, MNC, PCID, RSRP, SINR, RSRQ
> 

Hi Nick,

same over here when using a test network in 5G NSA mode:

at+qeng="servingcell"
+QENG: "servingcell","NOCONN"
+QENG: "LTE","FDD",1,01,1A2D001,1,300,1,3,3,1,-87,-3,-67,23,255,-32768,52
+QENG:"NR5G-NSA",1,01,500,-32768,-32768,-32768

OK

NASGetSignalInfo output for 5G NSA (from another test, still with the RG500Q):
+OK NASGetSignalInfo 02040000000000140600bffaa8ffb600170400008000801802000080

My assumption is that RSRP, SINR and RSRQ above would only be defined for
5G SA mode as can be seen from the qmicli -v --nas-get-signal-info output here
https://gitlab.freedesktop.org/mobile-broadband/libqmi/-/issues/32 .

I tried to stay out of the "guessing 5G QMI TLVs" business but since we
may never see a GobiAPI 2020 update here it goes anyway:
TLV 0x17 = RSRP and SINR (scaled by 10 like for LTE(?)), TLV 0x18 = RSRQ.

A TLV that looks a little bit easier to guess due to its unusual size:
NASGetSystemInfo TLV 0x50 = 5GS TAC from TS 24.501 section 9.11.3.8.

Regards,
Reinhard
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