LTE X2 Handover failure reason cause handover-target-not-allowed

Mobility
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1

Hi Experts.

Does any one can explain the further drill down of the LTE X2 Handover failure reason cause handover-target-not-allowed?

Vendor Huawei

2

Maybe for some visited users, some TACs aren’t allowed and after HO to restricted TACs, HO will reject by this cause.

3

So you mean to say that rejection totally based on Core end, not Radio end?

I have checked 3GPP documents but just found this thing Handover Target not Allowed Handover to the indicated target cell is not allowed for the UE in question.

4

Yes usually it’s based on Core.

5

If target cell doesn’t support the service like ENDC or VoLTE, you may get this message.

6

ENDC is not available, and target all cells supporting VoLTE and working fine, 95% failures seen on QCI9.

7

Hello, did you find the reason and solution?