Hi Experts.
We did a bandwidth expansion in LTE carrier in band 28.
We increased from 10 MHz to 15MHz.
The operation was successful in the whole network but not in two cells * in which the ibler increased, causing a drop in degradation.
Has anyone of you experienced this issue before and have you solved it?
I already checked the inteference, I did a FTT scan and counters. No changes.
Are they sites with larger coverage areas?
Suburban area.
Are these parameters OK in the site?
dlChannelBandwidth
The downlink channel bandwidth in the cell.
Valid values: 1400, 3000, 5000, 10000, 15000, 20000
ulChannelBandwidth
The uplink channel bandwidth in the cell.
Valid values: 1400, 3000, 5000, 10000, 15000, 20000
I had the same issue some years ago…
The problem was the Radio / Antenna connectors… they have to change jumpers and connectors and problem solved.
If it is Ericsson try mfar command to spot any problems at TX/RX branches.
Still a good idea is to move people to the site and perform an audit of the state of the antenna / connectors and jumpers.
Try to spot if there is no swap feeders.
I hope it helps… Cheers!
Yes, they both are ok, the third cell was also changed but it was not affected.
Thank you so much Dear.