User terminal, radio base station and radio communication method

Abstract

The present invention is designed to reduce the decrease of uplink throughput in the event a user terminal connects with a plurality of radio base stations. A user terminal (20) according to an example of the present invention provides a user terminal that connects with a plurality of radio base stations (10) including a first radio base station and a second radio base station, and this user terminal has a transmission section (203) that transmits uplink signals of a plurality of types to each radio base station, and a control section (401) that controls the transmission power of the uplink signals based on the priorities of the uplink signals for each radio base station, and, every time there are uplink signals of the same type, the control section configures the priority for the first radio base station higher than the priority for the second radio base station.

1 . A user terminal that communicates by using a first cell group (CG) and a second CG, the user terminal comprising:
 a transmission section that transmits uplink signals of a plurality of types in each CG; and   a control section that allocates power to an uplink signal of a given type to transmit in the first CG more preferentially than the uplink signal of the given type to transmit in the second CG.   
     
     
         2 . The user terminal according to  claim 1 , wherein the control section preferentially allocates power to the uplink signals to transmit in each CG, in an order of a PRACH, a channel including UCI, a PUSCH not including UCI and an SRS. 
     
     
         3 . The user terminal according to  claim 2 , wherein the control section preferentially allocates power in an order of a PRACH of the first CG, a PRACH of the second CG, a channel of the first CG including UCI, a channel of the second CG including UCI, a PUSCH of the first CG not including UCI, a PUSCH of the second CG not including UCI, an SRS of the first CG and an SRS of the second CG. 
     
     
         4 . The user terminal according to  claim 1 , wherein, when the user terminal supports asynchronous dual connectivity, the control section does not change, in a middle of a subframe, power of a signal that is being transmitted. 
     
     
         5 . The user terminal according to  claim 4 , wherein the transmission section transmits user terminal capability information to represent whether or not asynchronous dual connectivity can be supported. 
     
     
         6 . The user terminal according to  claim 1 , further comprising a PH reporting generating section that calculates a PH (Power Headroom) for each CG based on maximum uplink signal transmission power and uplink signal transmission power that is demanded by the CG, and generates a PH report. 
     
     
         7 . A radio base station that communicates with a user terminal by using a predetermined cell group, the user terminal communicating by using a first cell group (CG) and a second CG, the radio base station comprising:
 a transmission section that transmits control signals for controlling transmission power of uplink signals; and   a receiving section that receives the uplink signals, the transmission power of which is controlled based on the control signals,   wherein the uplink signals are controlled so that power is more preferentially allocated to an uplink signal of a given type to transmit in the first CG than the uplink signal of the given type to transmit in the second CG.   
     
     
         8 . A radio communication method for a user terminal that communicates by using a first cell group (CG) and a second CG, the radio communication method comprising:
 transmitting uplink signals of a plurality of types in each CG; and   allocating power to an uplink signal of a given type to transmit in the first CG more preferentially than the uplink signal of the given type to transmit in the second CG.   
     
     
         9 . (canceled) 
     
     
         10 . The user terminal according to  claim 2 , wherein, when the user terminal supports asynchronous dual connectivity, the control section does not change, in a middle of a subframe, power of a signal that is being transmitted. 
     
     
         11 . The user terminal according to  claim 3 , wherein, when the user terminal supports asynchronous dual connectivity, the control section does not change, in a middle of a subframe, power of a signal that is being transmitted.