User terminal, radio base station and radio communication method

Abstract

A user terminal configured to communicate with a radio base station includes a processor that configures a number of resource blocks used in a format for an uplink control signal; and a transmitter that transmits to the radio base station the uplink control signal using the format comprising the configured number of resource blocks.

What is claimed is: 
     
         1 . A user terminal configured to communicate with a radio base station, comprising:
 a processor that configures a number of resource blocks used in a format for an uplink control signal; and   a transmitter that transmits to the radio base station the uplink control signal using the format comprising the configured number of resource blocks.   
     
     
         2 . The user terminal according to  claim 1 , wherein the processor configures as the number of resource blocks a number of resource blocks designated based on higher layer signaling. 
     
     
         3 . The user terminal according to  claim 1 , wherein the processor maps uplink control information (UCI) in order from a first Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol in the configured number of resource blocks. 
     
     
         4 . The user terminal according to  claim 2 , wherein the processor maps UCI in order from a first SC-FDMA symbol in the configured number of resource blocks. 
     
     
         5 . The user terminal according to  claim 1 , wherein a spreading factor of the format is smaller than that of PUCCH format 3. 
     
     
         6 . The user terminal according to  claim 2 , wherein a spreading factor of the format is smaller than that of PUCCH format 3. 
     
     
         7 . The user terminal according to  claim 3 , wherein a spreading factor of the format is smaller than that of PUCCH format 3. 
     
     
         8 . The user terminal according to  claim 4 , wherein a spreading factor of the format is smaller than that of PUCCH format 3. 
     
     
         9 . The user terminal according to  claim 1 , wherein UCI is modulated by Quadrature Phase Shift Keying (QPSK) in the format. 
     
     
         10 . The user terminal according to  claim 1 , wherein the processor performs rate matching of UCI so as to coincide with a number of bits determined based on the configured number of resource blocks. 
     
     
         11 . A radio base station configured to communicate with a user terminal, comprising:
 a processor that configures a number of resource blocks used in a format for an uplink control signal; and   a receiver that receives from the user terminal the uplink control signal using the format comprising the configured number of resource blocks.   
     
     
         12 . A radio communication method in a user terminal configured to communicate with a radio base station, the radio communication method comprising:
 configuring a number of resource blocks used in a format for an uplink control signal; and   transmitting to the radio base station the uplink control signal using the format comprising the configured number of resource blocks.