Inter FREQ VoLTE Handover

Hello guys,
since HO acceleration/deceleration in E// is about impacting parameters A1A2SearchthresholdRSRP/RSRQ and InterfreqMeastype (chosing which IFREQ event to be responsible for HO execution) and if interfreqmeastype is A5 then A5threshold1RSRP and A5threshold1RSRQ values to be chosen: the problem is that these parameters do not separate VoLTE from DATA! I was wondering if there is a way to just accelerate Inter Freq HO for QCI1 (VoLTE)?
Many thanks in advance engineers ;)