The present invention provides a connection setup method, the corresponding user equipment, common central control node and communication system. A connection setup method performed by a user device, comprising: acquiring information transmitted by a plurality of cells; determining a plurality of candidate cells according to the information transmitted by the plurality of cells, sending a common connection setup request for the plurality of candidate cells to a common central control node, the common central control node corresponding to each of the plurality of candidate cells; receiving a common connection setup message for a plurality of connecting cells transmitted by the common central control node, the plurality of connecting cells being determined from the plurality of candidate cells by the common central control node, so that the user equipment establishes multiple radio connections through each of the plurality of connecting cells.