vt_add_sf(&req->Common.TimingInfo,-1);//RRC PDU schedule(if future timing) shall be ahead 1 subframe because of latency between RRC and PDCP
vt_add_sf(&req->Common.TimingInfo,-2);//RRC PDU schedule(if future timing) shall be ahead 2 subframe because of latency between VT_Timer_task --RRC -- PDCP