wherein {TAIL ~ the base station apparatus} comprises a receiver which receives {HEAD ~ an uplink reference signal} transmitted from the user apparatus using the determined second sequence identifier 
wherein { TAIL ~ the base station apparatus } comprises a receiver which receives { HEAD ~ an uplink reference signal } transmitted from the user apparatus using the determined second sequence identifier
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH