determine a second sequence identifier for use by {TAIL ~ the user apparatus} based on a first sequence identifier in a length of a reference signal sequence for transmitting in a maximum bandwidth in which {HEAD ~ the user apparatus} can transmit, and a frequency bandwidth allocated to the user apparatus, 
determine a second sequence identifier for use by { TAIL ~ the user apparatus } based on a first sequence identifier in a length of a reference signal sequence for transmitting in a maximum bandwidth in which { HEAD ~ the user apparatus } can transmit , and a frequency bandwidth allocated to the user apparatus ,
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH