Control information sending method, base station, and user equipment

A base station comprising:

• a receiver configured to receive first signaling from a first user equipment, wherein the first signaling carries an identifier of the first user equipment and information about a preamble sequence, the identifier to be used for random access between the first user equipment and the base station, and the preamble sequence to be used for random access between the first user equipment and second user equipment;
• a processor configured to obtain information about a user equipment cooperation group, wherein the user equipment cooperation group comprises the first user equipment and the second user equipment;
• and
• a transmitter configured to send second signaling to the first user equipment and the second user equipment, wherein the second signaling carries the information about the user equipment cooperation group.

A first user equipment comprising:

• a transmitter configured to send a first signaling to a base station, wherein the first signaling carries an identifier of the first user equipment and information about a preamble sequence, the identifier to be used for random access between the first user equipment and the base station, and the preamble sequence to be used for random access between the first user equipment and second user equipment;
• and
• a receiver configured to receive second signaling from the base station, wherein the second signaling carries information about a user equipment cooperation group, and wherein the user equipment cooperation group comprises the first user equipment and the second user equipment,
• wherein the transmitter is further configured to send a request for establishing the user equipment cooperation group at the second user equipment.