Base station apparatus, mobile terminal apparatus and communication control method

Abstract

To provide a base station apparatus, mobile terminal apparatus and communication control method for enabling control adapted to interference inside a Heterogeneous network to be performed to support the next-generation mobile communication system, a base station apparatus ( 20 ) shares at least a part of the frequency band with another base station apparatus ( 40 ) that covers a macro-cell, covers a pico-cell (C 1 ), is capable of transmitting a downlink transmission frame at transmission timing different from the another base station apparatus ( 40 ), and is configured to set resources, in which the downlink transmission frame undergoes interference from another downlink transmission frame including a blank period transmitted from the another base station apparatus ( 40 ), as blank resources, and assign user data to the downlink transmission frame while avoiding the blank resources.

1 . A base station apparatus which shares at least a part of a frequency band with another base station apparatus that covers a large-scale cell, covers a small-scale cell, and is capable of transmitting a downlink transmission frame at transmission timing different from the another base station apparatus, comprising:
 a blank resource setting section configured to set resources, in which the downlink transmission frame undergoes interference from another downlink transmission frame including a blank period transmitted from the another base station apparatus, as blank resources;   a user data assigning section configured to assign user data to the downlink transmission frame while avoiding the blank resources; and   a transmission section configured to transmit the downlink transmission frame assigned the user data to a mobile terminal apparatus.   
     
     
         2 . The base station apparatus according to  claim 1 , wherein the blank resource setting section sets the blank resources based on a shift amount of transmission timing of the downlink transmission frame with respect to the another downlink transmission frame. 
     
     
         3 . The base station apparatus according to  claim 2 , wherein the blank resource setting section sets the blank resources based on a set position of the blank period acquired from the another base station apparatus, in addition to the shift amount. 
     
     
         4 . A mobile terminal apparatus connected to a base station apparatus which shares at least a part of a frequency band with another base station apparatus that covers a large-scale cell, covers a small-scale cell, and is capable of transmitting a downlink transmission frame at transmission timing different from the another base station apparatus, comprising:
 a blank resource information acquiring section configured to acquire blank resource information to identify resources in which the downlink transmission frame transmitted from the base station apparatus undergoes interference by another downlink transmission frame including a blank period transmitted from the another base station apparatus, as blank resources set in the base station apparatus; and   a user data demodulation section configured to demodulate user data received from the base station apparatus while avoiding the blank resources, based on the blank resource information.   
     
     
         5 . The mobile terminal apparatus according to  claim 4 , wherein the blank resource information is a shift amount of transmission timing of the downlink transmission frame with respect to the another downlink transmission frame acquired from the base station apparatus. 
     
     
         6 . A communication control method in a base station apparatus which shares at least a part of a frequency band with another base station apparatus that covers a large-scale cell, covers a small-scale cell, and is capable of transmitting a downlink transmission frame at transmission timing different from the another base station apparatus, comprising:
 setting resources, in which the downlink transmission frame undergoes interference from another downlink transmission frame including a blank period transmitted from the another base station apparatus, as blank resources;   assigning user data to the downlink transmission frame while avoiding the blank resources; and   transmitting the downlink transmission frame assigned the user data to a mobile terminal apparatus.   
     
     
         7 .- 10 . (canceled)