directed signalling connection re-establishment), no NAS release

[zeggarinabil]

Hi Expert,


I am encountering the numbers of failure issues of voice Call (MO CS Call Dropped) for the drive test of CS with the cause as follows:


Drop_Cause_WCDMA : CCCH RRC Release (directed signalling connection re-establishment), no NAS release


Anyone could advise on the possible cause of this issue,


Many Thanks in Advance

[gerchase]

Looks like you are in the border of the coverage, you should check EcNo values to verify