Transmitting method, receiving method, relay device, base station and mobile station

A relay device comprising:

• a receiving unit configured to receive grant information for inter-device transmission and a transmitting device identification and a receiving device identification corresponding to the grant information;
• a processor configured to generate first control information according to the grant information, the transmitting device identification and the receiving device identification;
• and
• a transmitting unit configured to transmit the first control information to terminal devices performing the inter-device transmission,
• wherein the relay device is different from the terminal devices performing the inter-device transmission, and
• the receiving unit is further configured to receive scheduling information,
• the transmitting unit transmits the first control information according to the scheduling information, and wherein
• the relay device discards a not-transmitted part of the first control information when the entire first control information cannot be transmitted within a predetermined time period.