The base station includes a sequence identifier determining unit which performs scheduling to allocate a frequency based on an uplink channel reception state of the user apparatus, and which determines a second sequence identifier for {TAIL ~ use} by 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 the user apparatus can transmit, and {HEAD ~ a frequency bandwidth} allocated to the user apparatus 
The base station includes a sequence identifier determining unit which performs scheduling to allocate a frequency based on an uplink channel reception state of the user apparatus , and which determines a second sequence identifier for { TAIL ~ use } by 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 the user apparatus can transmit , and { HEAD ~ a frequency bandwidth } allocated to the user apparatus
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