Solution for RRC failures due to no reply by UE

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1

Hi Experts,
Anyone had experience with RRC failures due to no reply by UE?
Vendor is Huawei.
How did you deal with it?

2

Yes, it is due to overshooting or very agressive qrxlevmin.
Anyway, don’t work too hard, you will never manage to reduce it to zero samples.

3

Srborbsch switch on or uplinktimeralignment sf 10240 or infinity or harqmaxtxnumber to 6 or qrxlevelmin decrease a bit or smart preallocation enabled.
Apart from alarm check and vswr.
Srbprbsch.

1 Like
4

Reason of no reply :Week coverage ,channel interference, Ue faulty

drive test to check coverage , spectrum analyst to check interference

1 Like
5

I found for some of the cells , I had uppts interference.

I the other cells i have taken the suggestions, i will see how it goes after changes.

6

NoReply is one of the mysterious failures ever. Everything system doesn’t really know what went wrong goes to NoReply. As was mentioned already here, most common reason is interference (high RTWP) or coverage (i.e. overshooting). But can be as well due to some hardware problems or even TX issues.