Mobile station, base station, mobile communication system, and communication method

Abstract

A mobile station, a base station, a mobile communication system and a communication method enabling operations associated with simultaneous uplink reception in multiple stations to be simplified are provided. The base station includes a transmission timing determining unit determining a transmission timing based on scheduling conducted upon a data transmission request from a mobile station and notifying the mobile station of the transmission timing, and a receiving unit receiving data in accordance with the transmission timing.

1 . A mobile station comprising:
 a transmitter adapted to transmit a data transmission request;   wherein the transmitter transmits, to a first base station and a second base station, transmission timing transmitted from the first base station; and transmits data to the first base station and the second base station based on the transmission timing; and   
       a receiver adapted to receive the transmission timing. 
     
     
         2 . The mobile station according to  claim 1 , wherein the transmission timing is transmitted via an associated control channel. 
     
     
         3 . The mobile station according to  claim 1 , wherein the transmission timing is transmitted via an associated physical channel commonly used during a handover. 
     
     
         4 . The mobile station according to  claim 1 , wherein the transmission timing and a mobile station identifier is transmitted via a control channel commonly used among multiple mobile stations. 
     
     
         5 . A base station comprising:
 a controller adapted to determine a transmission timing based on scheduling conducted upon a data transmission request from a mobile station,   a transmitter adapted to transmit, to the mobile station, the transmission timing; and   a receiver adapted to receive data from the mobile station in accordance with the transmission timing.   
     
     
         6 . The base station according to  claim 5 , further comprising:
 a selection combination unit adapted to selectively combine data forwarded from another base station.   
     
     
         7 . The base station according to  claim 6 , further comprising:
 a retransmission request notifying unit issuing a retransmission request to the mobile station if an error is detected in the received data and the data is not forwarded from another base station.   
     
     
         8 . A base station comprising:
 a receiver adapted to receive data in accordance with a transmission timing transmitted from a mobile station; and   a packet forwarding unit adapted to forward decoded data to a first base station for the mobile station if no error is detected in the data.   
     
     
         9 . A method for a mobile station comprising:
 transmitting a data transmission request;   transmitting, to a first base station and a second base station, a transmission timing transmitted from the first base station; and   transmitting data to the first base station and the second base station based on the transmission timing.