Mobile communication system, base station apparatus, user apparatus and method

Abstract

A communication apparatus in a mobile communication system includes a first control information generation unit configured to generate first control information including retransmission information on a previously received data channel, a second control information generation unit configured to generate second control information including scheduling information on radio resources and a transmission signal generation unit configured to generate a transmission signal including a lower layer control channel including at least one of the first control information and the second control information. The transmission signal generation unit generates the transmission signal to transmit the first control information in any of subframes arriving at a first cycle and to transmit the second control information in any of subframes arriving at a second cycle longer than the first cycle.

1 .- 8 . (canceled) 
     
     
         9 . A base station apparatus in a mobile communication system, comprising:
 a first control information generation unit configured to generate first control information including retransmission information on a previously received uplink data channel;   a second control information generation unit configured to generate second control information including scheduling information on radio resources; and   a multiplexing unit configured to multiplex a downlink lower layer control channel and a downlink data channel to generate a downlink transmission signal, the downlink lower layer control channel including at least one of the first control information and the second control information,   wherein the multiplexing unit generates the downlink transmission signal to transmit the first control information in any of subframes arriving at a first cycle and to transmit the second control information in any of subframes arriving at a second cycle longer than the first cycle.   
     
     
         10 .- 12 . (canceled) 
     
     
         13 . A mobile communication system including a base station apparatus and a user apparatus,
 the base station apparatus comprising:   a first control information generation unit configured to generate first control information including retransmission information on an uplink data channel; and   a multiplexing unit configured to multiplex a downlink lower layer control channel and a downlink data channel to generate a downlink transmission signal, wherein the downlink lower layer control channel includes at least one of the first control information and second control information including scheduling information on radio resources,   the user apparatus comprising:   a first control information extraction unit configured to, if the user apparatus has previously transmitted an uplink data channel, extract the first control information from a received downlink lower layer control channel;   a second control information extraction unit configured to extract the second control information from the downlink lower layer control channel or other downlink lower layer control channel; and   an uplink transmission signal transmitting unit configured to transmit an uplink transmission signal in accordance with the first control information, wherein the uplink transmission signal has not been transmitted or is to be retransmitted,   wherein the multiplexing unit generates the downlink transmission signal to transmit the first control information in any of subframes arriving at a first cycle and to transmit the second control information in any of subframes arriving at a second cycle longer than the first cycle.   
     
     
         14 . (canceled)