Terminal device, base station apparatus, and integrated circuit

Abstract

A terminal device acquires a parameter indispensable in canceling or suppressing an interference signal, cancels or suppresses interference with high precision, and reduces a degradation in reception performance due to the interference. There is provided a first terminal device that communicates with a base station apparatus, including: a higher layer processing unit that determines NAICS information indicating whether or not NAICS has to be used; a reception unit that receives downlink control information which is transmitted from the base station apparatus; and a control unit that changes interpretation of the downlink control information based on a configuration that is determined by the higher layer processing unit, in which, in a case where a result of determining the NAICS information that is determined in the higher layer processing unit indicates that the NAICS has to be used, the control unit interprets the second MCS field as information indicating a modulation scheme of a second terminal device, among a first MCS field for a transport block 1 and a second MCS field for a transport block 2 , which are included in the downlink control information.

1 . A first terminal device that communicates with a base station apparatus, comprising:
 a higher layer processing unit that determines NAICS information indicating whether or not NAICS has to be used;   a reception unit that receives downlink control information which is transmitted from the base station apparatus; and   a control unit that changes interpretation of the downlink control information based on a configuration that is determined by the higher layer processing unit,   wherein, in a case where a result of determining the NAICS information that is determined in the higher layer processing unit indicates that the NAICS has to be used, the control unit interprets the second MCS field as information indicating a modulation scheme of a second terminal device, among a first MCS field for a transport block  1  and a second MCS field for a transport block  2 , which are included in the downlink control information.   
     
     
         2 . The first terminal device according to  claim 1 ,
 wherein the second MCS field includes information indicating modulation schemes of one or more of the second terminal devices.   
     
     
         3 . The first terminal device according to  claim 1 ,
 wherein interference due to communication in the second terminal device is canceled or suppressed using the second MCS field.   
     
     
         4 . The first terminal device according to  claim 1 ,
 wherein the second MCS field is a parameter relating to a terminal device that the base station apparatus multiplexes at the same time along with the first terminal device.   
     
     
         5 . The first terminal device according to  claim 1 ,
 wherein the second MCS field is a parameter relating to a terminal device that makes a connection to a base station apparatus other than the base station apparatus.   
     
     
         6 . A base station apparatus that communicates with a first terminal device, comprising:
 a higher layer processing unit that configures NAICS information indicating whether or not the first terminal device is instructed to use NAICS;   a control unit that changes a parameter of downlink control information based on whether or not the NAICS information indicates that the NAICS has to be used; and   a transmission unit that transmits the downlink control information,   wherein, in a case where the NAICS information indicates that the NAICS has to be used, information indicating a modulation scheme of a second terminal device is configured to be in the second MCS field, among a first MCS field for a transport block  1  and a second MCS field for a transport block  2 , which are included in the downlink control information, and the first MCS field and the second MCS field are transmitted to the first terminal device.   
     
     
         7 . An integrated circuit that is mounted into a first terminal device that communicates with a base station apparatus, comprising:
 a determination unit that determines NAICS information indicating whether or not NAICS has to be used; and   an interpretation unit that interprets a second MCS field as information indicating a modulation scheme of a second terminal device, among a first MCS field for a transport block  1  and the second MCS field for a transport block  2 , which are included in downlink control information, in a case where a result of determining the NAICS information indicates that the NAICS has to be used.   
     
     
         8 . (canceled)