Patent ID: 7907906

Claim:
A mobile station which receives a first datum and transmits a first reception result with a first timing when a first notification is received via a channel which notifies that data is to be transmitted, and receives a second datum and transmits a second reception result with a second timing when a second notification with a different timing is received via said channel, said mobile station comprising: a repeat transmission unit which, upon receiving said first notification, transmits said first reception result with said first timing, and repeats transmission of said first reception result with said second timing; and a control unit which performs control such that, upon receiving said first notification, reception processing is performed before completion of repeated transmission of said first reception result with said different timing on said channel which notifies that data is to be transmitted, wherein the control unit determines that a message addressed to the receiving station was transmitted based on the result of the reception processing with regard to a first sub-frame and a second sub-frame in the channel which notifies that data is to be transmitted.