RM510Q-GL can't connect in 5GNR SA

IoT Modules 5G Module
1

Hello,

I’m trying to connect a RM510Q-GL module to our 5GNR SA private network (n3, 5MHz), but until now I never suceeded to attach.

  • Other UE can attach to this network with the same SIM card used in RM510Q-GL.
  • RM510Q-GL can connect without issue to our LTE private network.
  • When using RM510Q-GL in 5G, I don’t see any PRACH coming from the device.

The cell seems detected by the device, however it doesn’t connect:
AT+COPS=?
+COPS: (0,“Free”,“Free”,“20816”,7),(0,“Test PLMN 1-1”,“Test1-1”,“00101”,12),(0,“Free”,“Free”,“20815”,2),(0,“Free”,“Free”,“20815”,7),(0,“F SFR”,“SFR”,“20810”,2),(0,“F-Bouygues Telecom”,“BYTEL”,“20820”,2),(0,“F-Bouygues Telecom”,“BYTEL”,“20820”,7),(0,“Orange F”,“Orange”,“20801”,7),(0,“F SFR”,“SFR”,“20810”,7),(0-4),(0-2)

AT+QSCAN=2
+QSCAN: “NR5G”, 1,01,370110,500,-73,-11,57,0

AT+CPOL?
+CPOL: 1,2,“00101”,1,1,1,1,1

AT+COPS?
+COPS: 2

at+qeng=“servingcell”
+QENG: “servingcell”,“SEARCH”

AT+COPS=0
+CME ERROR: 13

5GNR seems correctly configured:
AT+QNWPREFCFG=“mode_pref”
+QNWPREFCFG: “mode_pref”,LTE:NR5G

AT+QNWPREFCFG= “nr5g_band”
+QNWPREFCFG: “nr5g_band”,3

ATI
Quectel
RM510Q-GL
Revision: RM510QGLAAR11A03M4G

Could you kindly guide us to make this 5G SA connection working?
Any advice can be helpful.

Thanks,

Best regards,
Bastien

2

Dear @bchague
Did you try that force on 5G and try again?like AT+QNWPREFCFG=“mode_pref”, NR5G. And did you confirm the band is n3? I saw you configure the only one band and module didn’t search any network via at+qeng=“servingcell”.

3

Hello Silvia,

Forcing it to 5G only didn’t change the situation.
I tried another band (n28), same behaviour.

I modified the PLMN on both the sim and on my 5G network, it seems a bit better: the serving cell is detected, but still no PRACH.
at+qeng=“servingcell”
+QENG: “servingcell”,“LIMSRV”,“NR5G-SA”,“FDD”, 208,44,1234501,1,64,156970,28,1,-72,-11,39,0,7488
AT+COPS=0
+CME ERROR: SIM failure

This SIM works with other UE in 5GSA on this same network.
Any idea how to move forward?

Best regards,
Bastien