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leopardus2
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Chateau LTE12 starts with 3CA but becomes 2CA after a while

Wed Jul 15, 2020 8:54 pm

I noticed this recurring issue - running 7.0beta8 and modem firmware EG12EAPAR01A06M4G.
When LTE connection is set up, I initially see that the router aggregates 3 bands across the available ones : B1,B3,B7
After some time it goes into 2CA mode and it never reverts back to 3CA unless I close and reopen the LTE connection (disable/enable).

Is this a known issue? I understand that B7 is very weak signal, but when it uses it, it actually works fine and gives me 20 mbit/s more....

Thanks
Rick

       primary-band: B1@10Mhz earfcn: 150 phy-cellid: 81
            ca-band: B3@20Mhz earfcn: 1650 phy-cellid: 81


Columns: PHY-CELLID, BAND, EARFCN, RSRP, RSRQ, RSSI, AGE
  PHY  BA  EARF  RSRP     RSRQ   RSSI    AG
   81  B1   150  -95dBm   -9dB   -69dBm  2s
   81  B3  1650  -94dBm   -12dB  -72dBm  2s
  273  B7  3350  -117dBm  -15dB  -93dBm  2s
  280  B7  3350  -111dBm  -11dB  -91dBm  2s
  399  B1   150  -106dBm  -20dB  -72dBm  2s
  399  B3  1650  -104dBm  -19dB  -75dBm  2s
  400  B1   150  -104dBm  -12dB  -83dBm  5s
  400  B3  1650  -100dBm  -15dB  -75dBm  2s
 
leopardus2
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Re: Chateau LTE12 starts with 3CA but becomes 2CA after a while

Wed Jul 15, 2020 8:58 pm

After a disable/enable:
       primary-band: B1@10Mhz earfcn: 150 phy-cellid: 81
            ca-band: B7@20Mhz earfcn: 3350 phy-cellid: 280,B3@20Mhz earfcn: 1650 phy-cellid: 81
 
leopardus2
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Re: Chateau LTE12 starts with 3CA but becomes 2CA after a while

Fri Jul 31, 2020 8:23 pm

I fixed this by locking B7 (the weakest band) as primary, this way it works as I would like it to :-)
 
haj3s29a
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Re: Chateau LTE12 starts with 3CA but becomes 2CA after a while

Sun Aug 02, 2020 5:48 pm

I always have three bands in CA (very good signal).

In your case, it simply disconnect poor connection but you can lock in bands you want as you already did.
 
leopardus2
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Re: Chateau LTE12 starts with 3CA but becomes 2CA after a while

Mon Aug 03, 2020 12:42 am

I always have three bands in CA (very good signal).

In your case, it simply disconnect poor connection but you can lock in bands you want as you already did.
Unfortunately it seems I can only lock primary band. I wish I could also lock the CA ones.
 
haj3s29a
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Re: Chateau LTE12 starts with 3CA but becomes 2CA after a while

Mon Aug 03, 2020 6:55 am

Try cell lock but guys say CA is automatically determined by cell tower.

viewtopic.php?f=13&t=159889#p798970
 
leopardus2
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Re: Chateau LTE12 starts with 3CA but becomes 2CA after a while

Mon Aug 03, 2020 11:59 am

Try cell lock but guys say CA is automatically determined by cell tower.

viewtopic.php?f=13&t=159889#p798970
That's true, but I would like to be able to tell the modem to prefer B3 to B1 for CA, for example...
 
haj3s29a
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Re: Chateau LTE12 starts with 3CA but becomes 2CA after a while

Mon Aug 03, 2020 12:26 pm

I have sent a command for locking primary & CA. It seems to work. You have to try, it is all down to ISP.

I have an issue with two cell towers 2km apart and my modem often use the wrong/weak one.
 
leopardus2
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Re: Chateau LTE12 starts with 3CA but becomes 2CA after a while

Mon Aug 03, 2020 5:41 pm

I have sent a command for locking primary & CA. It seems to work. You have to try, it is all down to ISP.

I have an issue with two cell towers 2km apart and my modem often use the wrong/weak one.
what command would that be? the only command I know only locks primary band (yes you can specify more than one cell but it's for the purpose of primary band still . it uses best one from the list)
 
haj3s29a
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Re: Chateau LTE12 starts with 3CA but becomes 2CA after a while

Mon Aug 03, 2020 6:58 pm

already linked, check out post #6 ;-)
 
leopardus2
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Re: Chateau LTE12 starts with 3CA but becomes 2CA after a while

Tue Aug 04, 2020 12:20 am

That command only locks primary band (one or more cells can be specified but these are all primaries)

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