We are using the EM7511 with the Generic profile in order to connect to a private CBRS Network.
The CBRS network is running on center frequency 3690MHz with a 20MHz channel size. The issue is that eutran-43 (deprecated) and eutran-48 to be selected in order to connect. Although the old B43 does overlap in frequency with B48, it would be expected that in order to connect to a network that is fully within the B48 rules (3550-3700 MHz) it would only be required to selected eutran-48 in the band mask.
Additional information can be provided upon request.
Thanks for raising the ticket
I went through your description but I cannot find any questions, can you please description clearly concerns/problems you have on EM7511 CBRS network and what is your expectation then we can start analyzing
The issue is that we would expect to be able to connect to CBRS when eutran-48 only is selected. That is not the case, it requires selecting eutran-43 and eutran-48.
Hi @jbroderick1 ,
According to your previous comment, I understand that your EM7511 module cannot register band 48 when you set only band 48, but can register band 48 when you set band 43 and band 48 , Please confirm.
If yes, please share with me output of commands in below two cases:
After successfully register band 48 when you set band 43 and band 48
You are correct, that is exactly what is happening.
Successfully Registering with Band 48 and Band 43
ati9
Manufacturer: Sierra Wireless, Incorporated
Model: EM7511
Revision: SWI9X50C_01.07.02.00 6c91bc jenkins 2018/06/13 23:08:16
IMEI: 353587100145068
IMEI SV: 7
FSN: YT909271280415
+GCAP: +CGSM
OK
at!gstatus?
!GSTATUS:
Current Time: 594753 Temperature: 53
Reset Counter: 1 Mode: ONLINE
System mode: LTE PS state: Attached
LTE band: B48 LTE bw: 20 MHz
LTE Rx chan: 55990 LTE Tx chan: 55990
LTE SSC1 state:NOT ASSIGNED
LTE SSC2 state:NOT ASSIGNED
LTE SSC3 state:NOT ASSIGNED
LTE SSC4 state:NOT ASSIGNED
EMM state: Registered Normal Service
RRC state: RRC Idle
IMS reg state: No Srv
PCC RxM RSSI: -51 PCC RxM RSRP: -77
PCC RxD RSSI: -53 PCC RxD RSRP: -80
Tx Power: -- TAC: 0001 (1)
RSRQ (dB): -6.2 Cell ID: 00000105 (261)
SINR (dB): 30.0
OK
at+cereg?
+CEREG: 0,1
OK
at+cops?
+cops: 0,0,"Council Rock Test Networ CRock",7
at!band=?
Index, Name, GW Band Mask L Band Mask 1 L Band Mask 2 TDS Band Mask L Band Mask 3 L Band Mask 4
00, All bands 100600000EC00000 0000A700B20E39DF 0000000000000002 0000000000000000 0000000000000000 0000000000000000
01, Europe 3G 0002000000400000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
02, North America 3G 0000000004800000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
03, CBRS 0000000000000000 0000800000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
06, Europe 0002000000400000 00000000000801C5 0000000000000000 0000000000000000 0000000000000000 0000000000000000
07, North America 0000000004800000 000001000200385A 0000000000000002 0000000000000000 0000000000000000 0000000000000000
08, WCDMA ALL 100600000EC00000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
09, LTE ALL 0000000000000000 0000A700B20E39DF 0000000000000002 0000000000000000 0000000000000000 0000000000000000
0000000000000002 - B66
0000800000000000 - B48
0000200000000000 - B46
0000040000000000 - B43
0000020000000000 - B42
0000010000000000 - B41
0000000080000000 - B32
0000000020000000 - B30
0000000010000000 - B29
0000000002000000 - B26
0000000000080000 - B20
0000000000040000 - B19
0000000000020000 - B18
0000000000002000 - B14
0000000000001000 - B13
0000000000000800 - B12
0000000000000100 - B9
0000000000000080 - B8
0000000000000040 - B7
0000000000000010 - B5
0000000000000008 - B4
0000000000000004 - B3
0000000000000002 - B2
0000000000000001 - B1
1000000000000000 - B19 (850)
0004000000000000 - B9 (1700)
0002000000000000 - B8 (900)
0000000008000000 - B6 (800)
0000000004000000 - B5 (850)
0000000002000000 - B4 (1700)
0000000000800000 - B2 (1900)
0000000000400000 - B1 (2100)
OK
at!band?
Unknown band mask. Use AT!BAND to set band.
0000000000000000 0000840000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
Unsuccessfully register with only band 48
ati9
Manufacturer: Sierra Wireless, Incorporated
Model: EM7511
Revision: SWI9X50C_01.07.02.00 6c91bc jenkins 2018/06/13 23:08:16
IMEI: 353587100145068
IMEI SV: 7
FSN: YT909271280415
+GCAP: +CGSM
OK
a!gstats
!GSTATUS:
Current Time: 595305 Temperature: 53
Reset Counter: 1 Mode: ONLINE
System mode: Unknown PS state: Not attached
OK
at+ee?
+CEREG: 2,0
OK
at+cops?
+COPS: 0
OK
tbn?
Index, Name, GW Band Mask L Band Mask 1 TDS Band Mask L Band Mask 2 L Band Mask 3 L Band Mask 4
03, CBRS 0000000000000000 0000800000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
OK
As a side note, we are running this network on a private network so I have access to the mme logs and I do not see any attach requests after changing the band to eutran-48 only. And the device will immediately register after adding eutran-43 back.