Terminal device, base station device, communication system, and communication method

Abstract

A transmission device that generates control information including 3-bit information and transmits a physical downlink shared channel, a reference signal for demodulation of the physical downlink shared channel, and the control information, wherein, in a case that all codewords which are mapped to the physical downlink shared channel are enabled, among a first value to an eighth value indicated by the 3-bit information, the third value to the eighth value indicate that the number of layers is from 3 to 8 respectively, and the first value and the second value indicate that the number of layers is equal to 2, and the first value indicates that the scrambling identity for the reference signal is equal to 0 and the second value indicates that the scrambling identity is equal to 1.

1 . A terminal device configured to communicate with a base station device, the terminal device comprising:
 reception circuitry configured to receive, from the base station device, a physical downlink shared channel, a reference signal for demodulation of the physical downlink shared channel, and control information,   wherein, the control information includes at least a first information, 5-bit modulation and coding scheme (MCS) information for a first codeword, 1-bit new data indicator (NDI) information for the first codeword, 2-bit redundancy version (RV) information for the first codeword, 5-bit MCS information for a second codeword, 1-bit NDI information for the second codeword, and 2-bit RV information for the second codeword, and   the first information indicates a number of code division multiplexing and antenna port(s).   
     
     
         2 . A base station device configured to communicate with a terminal device, the base station device comprising:
 transmission circuitry configured to transmit, to the terminal device, a physical downlink shared channel, a reference signal for demodulation of the physical downlink shared channel, and control information,   wherein, the control information includes at least a first information, 5-bit modulation and coding scheme (MCS) information for a first codeword, 1-bit new data indicator (NDI) information for the first codeword, 2-bit redundancy version (RV) information for the first codeword, 5-bit MCS information for a second codeword, 1-bit NDI information for the second codeword, and 2-bit RV information for the second codeword, and   the first information indicates a number of code division multiplexing and antenna port(s).   
     
     
         3 . A communication method performed by a terminal device configured to communicate with a base station device, the communication method comprising:
 receiving, from the base station device, a physical downlink shared channel, a reference signal for demodulation of the physical downlink shared channel, and control information,   wherein, the control information includes at least a first information, 5-bit modulation and coding scheme (MCS) information for a first codeword, 1-bit new data indicator (NDI) information for the first codeword, 2-bit redundancy version (RV) information for the first codeword, 5-bit MCS information for a second codeword, 1-bit NDI information for the second codeword, and 2-bit RV information for the second codeword, and   the first information indicates a number of code division multiplexing and antenna port(s).   
     
     
         4 . A communication method performed by a base station device configured to communicate with a terminal device, the communication method comprising:
 transmitting, to the terminal device, a physical downlink shared channel, a reference signal for demodulation of the physical downlink shared channel, and control information,   wherein, the control information includes at least a first information, 5-bit modulation and coding scheme (MCS) information for a first codeword, 1-bit new data indicator (NDI) information for the first codeword, 2-bit redundancy version (RV) information for the first codeword, 5-bit MCS information for a second codeword, 1-bit NDI information for the second codeword, and 2-bit RV information for the second codeword, and   the first information indicates a number of code division multiplexing and antenna port(s).