UE not following reselection priorities

Then this is it. IMMCI last for 3 hours :slight_smile:

Till T320.

In NR T320 is always 180 minutes. Don’t know for LTE.

We can configure t320 for dedicated priority.

It’s 60 minutes.
And in both case it is configurable.

Sorry in NR t320 is 120 minutes, in LTE it is always 180 minutes.
It is vendor dependent.
For Huawei (the case here), NR T320 is 120 minutes and in LTE T320 it is always 180 minutes.

Dear @Umar_Mir, if above given behaviour observed in logs also, then there is no issue at all.

So finally we found the explanation: it is due to IMMCI.

Yes, I think.

Yes, it stays on L900.
But I have few queries regarding IMMCI.
Why it overrides SIB5 and does it depends on UE capability? Like in my other handset it is following SIB5.

This IMMCI is based on subscriberprofile ID from HSS. SPID can have up to 256 profiles, each UE is given one profile.

If UE is given dedicated prio in RRC release, then standard says that SIB5 will not be followed till T320.
Otherwise UE follows SIB5.

Apart from this, idle mode load balancing also give IMMCI.

But why UE is given dedicated prio in RRC release and why other handset not following this?
Can we remove this?
I mean, I am thinking of possible solution for that handset…

So I can try turn IMLB OFF and check?

Yes, but why you want to make it OFF?
IMLB ensures proper load balancing among carriers in idle mode.

No, I mean how do I fix issue for such handsets which are causing this issue?
Also point is why only one handset is showing this behaviour?

This is non problematic handset showing L1800 higher priority while camped on L1800 and later also stays on L1800:

This is problematic handset showing L900 higher priority and camped on L900 and after this message still camp on L900:

You have to distinguish where the issue come from: either for IMLB or from SPID from HSS.

That’s one point.
But also need to find out why only few handsets facing this issue.

Yes, right.
Just try to disable IMLB first, as it is easier.
If issue still there then it’s SPID issue.