Hi, I have many modems in the same area, they do continuous hand over due to the fact that they are. How can I instruct the module via AT Command to talk only with a specified one Cell ID, or a preferred list of cells?
AT+CGREG?
+CGREG: 2,1,“FFFE”,“0EA4710E”,7
AT+CCELL?
ERROR
Best regards,
MatthewB
I don’t quite see any AT command for this..
BTW, are you using the old SLQS SDK?
I saw there is API SLQSNASSwiSetChannelLock(), it might help on your situation.
Modems are many(100+) in the same area, same TAC, covered by 7 or 10 B20 LTE cells of the same ISP and they are not working great just because there are too many similar signal reflections in the same band, the upgrade in this case can not be done remote. The only thing I can do now is a fast AT Command to fast stop handovers.
10Q!
you need to check whether you can lock to some cell by limiting the LTE band (AT!BAND)and manual network operator setting (AT+COPS)
You might also see if there is any improvement for locking to LTE only by AT!SELRAT command
Already done!
AT+COPS=1,2,“22601”
AT^SYSCONFIG=16,3,0,4
AT!SELRAT=06
IntraFreq: PCI RSRQ RSRP RSSI RXLV
29 -8.5 -76.3 -50.7 –
45 -13.6 -80.8 -58.1 –
80 -15.5 -83.8 -58.7 –
RSRP fluctuation due to LTE usage go up and down and all modems do handover instead to stay on a cell until the signal is lost from that cell. Modems are not mobile are fixed assets.
how about setting AT!BAND to single LTE band?
The issue is for LTE B20 0000000000080000 Locked modems. They are all locked in B20.
Example:
Serving: EARFCN
6250
IntraFreq: PCI RSRQ RSRP RSSI RXLV
372 -11.9 -105.6 -76.4 –
374 -17.1 -110.3 -84.4 –
152 -14.9 -108.7 -84.3 –
29 -18.5 -112.8 -84.9 –
4 -20.0 -116.7 -86.9 –
149 -20.0 -117.8 -87.0 –
307 -20.0 -115.6 -88.5 –
42 -19.5 -117.9 -85.4 –
then i don’t have any idea unless to use the above old SLQS SDK.
Can you please tell me what this emergency mean?
emerg con_sdk: Active Band Class :122
at that moment latency go to: icmp_seq=19 ttl=61 time=3681 ms
while the signal is about like this
!GSTATUS:
Current Time: 1008 Temperature: 39
Reset Counter: 1 Mode: ONLINE
System mode: LTE PS state: Attached
LTE band: B20 LTE bw: 10 MHz
LTE Rx chan: 6250 LTE Tx chan: 24250
LTE CA state: NOT ASSIGNED
EMM state: Registered Normal Service
RRC state: RRC Connected
IMS reg state: No Srv
PCC RxM RSSI: -60 RSRP (dBm): -92
PCC RxD RSSI: -97 RSRP (dBm): -140
Tx Power: 17 TAC: A839 (43065)
RSRQ (dB): -12.5 Cell ID: 00C8910F (13144335)
SINR (dB): 0.4
and the emergency log it crashes the linux
Where did you get this wording???
user.info kernel: usb 1-1: GobiSerial converter now attached to ttyUSB2
user.info kernel: GobiSerial: 2015-08-27/SWI_2.25:GobiSerial
GobiNet: 2015-12-08/SWI_2.36
syslogd -C256 -L -R
What do you mean? I don’t see the emergency log
I do not understand what 122 means in LTE Bands and why this report from module is an emergent one.
That 122 is not coming out from module ..
the log appear when the modem handover from a cell ID to another cell ID, and instead to send its traffic to destination it is loosing time to hand over, this is happening nonstop while the linux system crush because consdk goes to 100% use of cpu… → end of remote access until power off/on.
ISP solution so far, is to put me to install a concrete high wall to obturate the signal from other cells.
Probably you need to check which application is printing the log 122
Hi,
Please try below AT command for cell lock.
AT!CELLLOCK=?
!CELLLOCK= mode, [ arfcn , [ pci ]]
mode:
‘0’ = Disable cell lock
‘1’ = Lock UMTS cell
‘2’ = Lock LTE cell
arfcn: DL ARFCN
pci: Only for LTE cell locking
OK
AT!CELLLOCK=0
OK
example 1:
//Lock UMTS cell
AT!CELLLOCK=1,10700
OK
AT!RESET //The setting ONLY effect after RESET
OK
AT!GSTATUS?
!GSTATUS:
Current Time: 26 Temperature: 29
Bootup Time: 5 Mode: ONLINE
System mode: WCDMA PS state: Not attached
WCDMA band: WCDMA 2100
WCDMA channel: 10700
GMM (PS) state:DEREGISTERED NO SERVICE
MM (CS) state: IDLE NO SERVICE
WCDMA L1 state:L1M_DEEP_SLEEP LAC: 0000 (0)
RRC state: DISCONNECTED Cell ID: 00000000 (0)
RxM RSSI C0: — RxD RSSI C0: —
RxM RSSI C1: — RxD RSSI C1: —
OK
Example 2:
//Lock LTE Cell
AT!CELLLOCK=2,1700
OK
AT!RESET
OK
AT!GSTATUS?
!GSTATUS:
Current Time: 19 Temperature: 29
Bootup Time: 6 Mode: ONLINE
System mode: LTE PS state: Not attached
LTE band: No band LTE bw: Unknown
LTE Rx chan: 65535 LTE Tx chan: 65535
EMM state: Deregistered No Cell
RRC state: RRC Idle
IMS reg state: No Srv
RSSI (dBm): 0 Tx Power: 0
RSRP (dBm): 0 TAC: 0000 (0)
RSRQ (dB): 0 Cell ID: 00000000 (0)
SINR (dB): -20.0
OK
AT!CELLLOCK=2,1650,120
OK
AT!RESET
OK
AT!GSTATUS?
!GSTATUS:
Current Time: 74 Temperature: 28
Bootup Time: 6 Mode: ONLINE
System mode: LTE PS state: Not attached
LTE band: No band LTE bw: Unknown
LTE Rx chan: 65535 LTE Tx chan: 65535
EMM state: Deregistered No Cell
RRC state: RRC Idle
IMS reg state: No Srv
RSSI (dBm): 0 Tx Power: 0
RSRP (dBm): 0 TAC: 0000 (0)
RSRQ (dB): 0 Cell ID: 00000000 (0)
SINR (dB): -20.0
OK
AT!CELLLOCK=2,1650
OK
AT!RESET
OK
AT!GSTATUS?
!GSTATUS:
Current Time: 38 Temperature: 30
Bootup Time: 5 Mode: ONLINE
System mode: LTE PS state: Attached
LTE band: B3 LTE bw: 20 MHz
LTE Rx chan: 1650 LTE Tx chan: 19650
EMM state: Registered Normal Service
RRC state: RRC Idle
IMS reg state: No Srv
RSSI (dBm): -53 Tx Power: 0
RSRP (dBm): -80 TAC: 252A (9514)
RSRQ (dB): -7 Cell ID: 06ABE402 (111928322)
SINR (dB): 7.8
OK
AT!CELLLOCK=0
OK
AT!GSTATUS?
!GSTATUS:
Current Time: 50 Temperature: 29
Bootup Time: 5 Mode: ONLINE
System mode: LTE PS state: Attached
LTE band: B3 LTE bw: 20 MHz
LTE Rx chan: 1650 LTE Tx chan: 19650
EMM state: Registered Normal Service
RRC state: RRC Idle
IMS reg state: No Srv
RSSI (dBm): -54 Tx Power: 0
RSRP (dBm): -81 TAC: 252A (9514)
RSRQ (dB): -8 Cell ID: 06ABE402 (111928322)
SINR (dB): 6.0
OK
Example 3:
//Unsupported band or PCI by MC7304
AT!CELLLOCK=1,50000
ERROR
AT!CELLOCK=1,10700,120
ERROR
AT!CELLOCK=2,16000
ERROR
AT!CELLLOCK=2,1650,510
ERROR
(post deleted by author)
Hi, this is what I need, but is not available as I can see
MODEM MC7304 DAPN QMI
usb 1-1: Product: MC7304
Model Id :MC7304
Manufacture :Sierra Wireless, Incorporated
AT!PRIID?
PRI Part Number: 9903554
Revision: 05.02
AT!GOBIIMPREF?
!GOBIIMPREF:
preferred fw version: 05.05.16.02
preferred carrier name: GENEU-4G
preferred config name: GENEU-4G_005.006_001
current fw version: 05.05.16.02
current carrier name: GENEU-4G
current config name: GENEU-4G_005.006_001
AT!CELLLOCK=?
ERROR