Terminal apparatus and communication method thereof

摘要

This invention is directed to a terminal apparatus capable of preventing the degradation of reception quality of control information even in a case of employing SU-MIMO transmission system. A terminal (200), which uses a plurality of different layers to transmit two code words in which control information is placed, comprises: a resource amount determining unit (204) that determines, based on a lower one of the encoding rates of the two code words or based on the average value of the reciprocals of the encoding rates of the two code words, resource amounts of control information in the respective ones of the plurality of layers; and a transport signal forming unit (205) that places, in the two code words, the control information modulated by use of the resource amounts, thereby forming a transport signal.

主权项

1. A terminal apparatus that transmits control information in a plurality of layers, the apparatus comprising:
a determining section that determines an amount of resource of the control information in the plurality of layers; and a transmission section that transmits the control information based on the amount of the resource of the control information, wherein the amount of the resource QCW#0+CW#1 of the control information is determined by equation 1:⁢(Equation⁢⁢1)QCW⁢#0+CW⁢#1=⌈(O+P)·LCW⁢#0+LCW⁢#1∑r=0CCW⁢#0-1⁢KrCW⁢#0MCW⁢#0scPUSCH-initial·NCW⁢#0symbPUSCH-initial×LCW⁢#0+∑r=0CCW⁢#1-1⁢KrCW⁢#1MCW⁢#1⁢scPUSCH-initial·NCW⁢#1⁢symbPUSCH-initial×LCW⁢#1·βoffsetPUSCHL⌉ where O indicates the number of bits in the control information, P indicates the number of error correction bits added to the control information, βoffsetPUSCH indicates an amount of offset, L indicates the number of the plurality of layers, LCW#0 and LCW#1 each indicate the number of layers assigned to a corresponding one of code words #0 and #1, MCW#0SCPUSCH-initial and MCW#1SCPUSCH-initial indicate physical uplink shared channel (PUSCH) transmission bandwidths for the code words #0 and #1, respectively, NCW#0symbPUSCH-initial and NCW#1symbPUSCH-initial each indicate the number of transmission symbols for a corresponding one of the code words #0 and #1, KrCW#0 and KrCW#1 each indicate the number of bits in each code block r for a corresponding one of the code words #0 and #1, and CCW#0 and CCW#1 each indicate the number of code blocks into which a data signal in a corresponding one of the code words #0 and #1 is divided.