Mobile communication method and radio base station

Abstract

Transmission/reception timing of a data signal and a control signal through a Uu interface and transmission/reception timing of the data signal through a Ud interface are properly adjusted. A mobile communication method according to the present invention includes: a step A in which a radio base station eNB notifies a mobile station UE# 1 and a mobile station UE# 2 that an opportunity to transmit and receive the data signal through the Ud interface is allocated through a PDCCH in which an X-RNTI is used; and a step B in which the radio base station eNB transmit “direction information”, for notifying of a direction in which the data signal should be transmitted in the opportunity, to the mobile station UE# 1 and the mobile station UE# 2.

1 . A mobile communication method for transmitting and receiving a data signal and a control signal through a radio base station interface between a first mobile station and a second mobile station and a radio base station, and for transmitting and receiving the data signal through an inter-mobile station interface between the first mobile station and the second mobile station, the mobile communication method comprising:
 a step A in which the radio base station notifies the first mobile station and the second mobile station that an opportunity to transmit and receive the data signal through the inter-mobile station interface is allocated through a physical downlink control channel in which common identification information is used; and   a step B in which the radio base station transmits transmission direction information through RRC signaling, for notifying of a direction in which the data signal should be transmitted in the opportunity, to the first mobile station and the second mobile station.   
     
     
         2 . A radio base station that is used in a mobile communication system configured to be able to transmit and receive a data signal and a control signal through a radio base station interface between a first mobile station and a second mobile station and a radio base station, and to transmit and receive the data signal through an inter-mobile station interface between the first mobile station and the second mobile station,
 the radio base station comprising a transmission unit configured to notify the first mobile station and the second mobile station that an opportunity to transmit and receive the data signal through the inter-mobile station interface is allocated through a physical downlink control channel in which common identification information is used,   wherein the transmission unit is configured to transmit transmission direction information through RRC signaling, for notifying of a direction in which the data signal should be transmitted in the opportunity, to the first mobile station and the second mobile station.   
     
     
         3 . The radio base station according to  claim 2 , wherein the transmission direction information is tied to a periodic time resource and frequency resource. 
     
     
         4 . The radio base station according to  claim 2 , wherein the transmission unit is configured to notify of a frequency, at which the data signal should be transmitted and received through the inter-mobile station interface, through the physical downlink control channel. 
     
     
         5 . The radio base station according to  claim 2 , wherein the transmission unit is configured to notify of a frequency, at which the data signal should be transmitted and received through the inter-mobile station interface, through RRC signaling. 
     
     
         6 . The radio base station according to  claim 2 , wherein the transmission unit is configured to notify of a subframe, to which the data signal should be transmitted and received through the inter-mobile station interface, through the physical downlink control channel. 
     
     
         7 . The radio base station according to  claim 2 , wherein the transmission unit is configured to transmit time-division information necessary to transmit and receive the data signal and the control signal through the radio base station interface and transmit and receive the data signal through the inter-mobile station interface in a time-division manner, through RRC signaling. 
     
     
         8 . The radio base station according to  claim 2 , wherein the transmission unit is configured such that a format of the physical downlink control channel, for notifying that the opportunity to transmit and receive the data signal through the radio base station interface is allocated, is different from a format of physical downlink control channel, for notifying that the opportunity to transmit and receive the data signal through the inter-mobile station interface is allocated.