Uplink resource allocation for transmitting information indicating an ack/nack for downlink data in a mobile communication system

Abstract

A mobile communication system and a communication method are provided in which, a base station apparatus can efficiently allocate, to a mobile station apparatus, an uplink resource for transmitting information indicating an ACK/NACK for downlink data. The mobile station apparatus that communicates with the base station apparatus, comprising: a scheduling unit configured to determine two physical uplink control channel resources for a transmission using a physical downlink shared channel in a case that a downlink transmission mode that supports the transmission of up to two downlink transport blocks using the physical downlink shared channel is configured for the secondary cell, and a physical downlink control channel that indicates the transmission using the physical downlink shared channel on the secondary cell is detected on the secondary cell.

1 . A mobile station apparatus configured to communicate with a base station apparatus using a plurality of serving cells including a primary cell and a secondary cell, the mobile station apparatus comprising:
 circuitry configured to detect on the primary cell, a physical downlink control channel that instructs transmission of a physical downlink shared channel on the primary cell;   circuitry configured to detect on the secondary cell, a physical downlink control channel that instructs transmission of a physical downlink shared channel on the secondary cell; and   circuitry configured to
 determine two physical uplink control channel resources for the transmission of the physical downlink shared channel on the primary cell in a case that a downlink transmission mode that supports transmission of up to two downlink transport blocks is configured for the primary cell, and 
 determine two physical uplink control channel resources for the transmission of the physical downlink shared channel on the secondary cell in a case that a downlink transmission mode that supports transmission of up to two downlink transport blocks is configured for the secondary cell, wherein 
   the two physical uplink control channel resources for the transmission of the physical downlink shared channel on the primary cell are determined using a number of a first control channel element used for the transmission of the physical downlink control channel detected on the primary cell, and   the two physical uplink control channel resources for the transmission of the physical downlink shared channel on the secondary cell are determined according to a value set to a downlink control information field transmitted using the physical downlink control channel detected on the secondary cell.   
     
     
         2 . The mobile station apparatus according to  claim 1 , wherein
 one of the two physical uplink control channel resources for the transmission of the physical downlink shared channel on the primary cell corresponds to a number of the first control channel element used for the transmission of the physical downlink control channel detected on the primary cell, and   the other one of the two physical uplink control channel resources for the transmission of the physical downlink shared channel on the primary cell corresponds to a number defined by adding one to the number of the first control channel element used for the transmission of the physical downlink control channel detected on the primary cell.   
     
     
         3 . The mobile station apparatus according to  claim 1 , further comprising:
 circuitry configured to transmit to the base station apparatus, information indicative of a positive acknowledgment or a negative acknowledgment for the downlink transport blocks, using a physical uplink control channel resource selected from a plurality of physical uplink control channel resources including the two physical uplink control channel resources for the transmission of the physical downlink shared channel on the primary cell.   
     
     
         4 . A base station apparatus configured to communicate with a mobile station apparatus using a plurality of serving cells including a primary cell and a secondary cell, the base station apparatus comprising:
 circuitry configured to transmit on the primary cell, a physical downlink control channel that instructs transmission of a physical downlink shared channel on the primary cell;   circuitry configured to transmit on the secondary cell, a physical downlink control channel that instructs transmission of a physical downlink shared channel on the secondary cell; and   circuitry configured to
 determine two physical uplink control channel resources for the transmission of the physical downlink shared channel on the primary cell in a case that a downlink transmission mode that supports transmission of up to two downlink transport blocks is configured for the primary cell, and 
 determine two physical uplink control channel resources for the transmission of the physical downlink shared channel on the secondary cell in a case that a downlink transmission mode that supports transmission of up to two downlink transport blocks is configured for the secondary cell, wherein 
   the two physical uplink control channel resources for the transmission of the physical downlink shared channel on the primary cell are determined using a number of a first control channel element used for the transmission of the physical downlink control channel detected on the primary cell, and   the two physical uplink control channel resources for the transmission of the physical downlink shared channel on the secondary cell are determined according to a value set to a downlink control information field transmitted using the physical downlink control channel detected on the secondary cell.   
     
     
         5 . The base station apparatus according to  claim 4 , wherein
 one of the two physical uplink control channel resources for the transmission of the physical downlink shared channel on the primary cell corresponds to a number of the first control channel element used for the transmission of the physical downlink control channel detected on the primary cell, and   the other one of the two physical uplink control channel resources for the transmission of the physical downlink shared channel on the primary cell corresponds to a number defined by adding one to the number of the first control channel element used for the transmission of the physical downlink control channel detected on the primary cell.   
     
     
         6 . A communication method for a mobile station apparatus configured to communicate with a base station apparatus using a plurality of serving cells including a primary cell and a secondary cell, the communication method comprising:
 detecting on the primary cell, a physical downlink control channel that instructs transmission of a physical downlink shared channel on the primary cell:   detecting on the secondary cell, a physical downlink control channel that instructs transmission of a physical downlink shared channel on the secondary cell;   determining two physical uplink control channel resources for the transmission of the physical downlink shared channel on the primary cell in a case that a downlink transmission mode that supports transmission of up to two downlink transport blocks is configured for the primary cell, and   determining two physical uplink control channel resources for the transmission of the physical downlink shared channel on the secondary cell in a case that a downlink transmission mode that supports transmission of up to two downlink transport blocks is configured for the secondary cell, wherein   the two physical uplink control channel resources for the transmission of the physical downlink shared channel on the primary cell are determined using a number of a first control channel element used for the transmission of the physical downlink control channel detected on the primary cell, and   the two physical uplink control channel resources for the transmission of the physical downlink shared channel on the secondary cell are determined according to a value set to a downlink control information field transmitted using the physical downlink control channel detected on the secondary cell.   
     
     
         7 . A communication method for a base station apparatus configured to communicate with a mobile station apparatus using a plurality of serving cells including a primary cell and a secondary cell, the communication method comprising:
 transmitting on the primary cell, a physical downlink control channel that instructs transmission of a physical downlink shared channel on the primary cell;   transmitting on the secondary cell, a physical downlink control channel that instructs transmission of a physical downlink shared channel on the secondary cell;   determining two physical uplink control channel resources for the transmission of the physical downlink shared channel on the primary cell in a case that a downlink transmission mode that supports transmission of up to two downlink transport blocks is configured for the primary cell; and   determining two physical uplink control channel resources for the transmission of the physical downlink shared channel on the secondary cell in a case that a downlink transmission mode that supports transmission of up to two downlink transport blocks is configured for the secondary cell, wherein   the two physical uplink control channel resources for the transmission of the physical downlink shared channel on the primary cell are determined using a number of a first control channel element used for the transmission of the physical downlink control channel detected on the primary cell, and   the two physical uplink control channel resources for the transmission of the physical downlink shared channel on the secondary cell are determined according to a value set to a downlink control information field transmitted using the physical downlink control channel detected on the secondary cell.