A method of receiving a random access response, the method comprising: a user equipment transmits a random access preamble to a base station (Node-B) (S430; S930); the user equipment receives the random access response corresponding to the random access preamble from the base station (Node-B) (S450; S950), the received random access response including information of a transmission time when the random access preamble is transmitted, the user equipment determines whether or not the received random access response is the response to the transmitted random access preamble, characterized in that the method further comprises: the user equipment stores a subframe number for transmitting the random access preamble; the information of the transmission time when the random access preamble is transmitted includes a number indicating the transmission time of the random access preamble, the number being a number allocated to a subframe, in which a random access channel, RACH, slot is present, the user equipment checks whether the number included in the received random access response is identical to the subframe number of the transmitted random access preamble stored by the user equipment (S460; S960), the user equipment determines that the received random access response is the response to the transmitted random access preamble, if the number included in the received random access response is identical to the subframe number of the transmitted random access preamble stored by the user equipment (S460; S960), and the user equipment receives the random access response within a predetermined time span including a predetermined time point after a transmission time when the random access preamble is transmitted, and the predetermined time point is obtained by adding an offset time to the random access preamble transmission time. a user equipment transmits a random access preamble to a base station (Node-B) (S430; S930); the user equipment receives the random access response corresponding to the random access preamble from the base station (Node-B) (S450; S950), the received random access response including information of a transmission time when the random access preamble is transmitted, the user equipment determines whether or not the received random access response is the response to the transmitted random access preamble, the user equipment stores a subframe number for transmitting the random access preamble; the information of the transmission time when the random access preamble is transmitted includes a number indicating the transmission time of the random access preamble, the number being a number allocated to a subframe, in which a random access channel, RACH, slot is present, the user equipment checks whether the number included in the received random access response is identical to the subframe number of the transmitted random access preamble stored by the user equipment (S460; S960), the user equipment determines that the received random access response is the response to the transmitted random access preamble, if the number included in the received random access response is identical to the subframe number of the transmitted random access preamble stored by the user equipment (S460; S960), and the user equipment receives the random access response within a predetermined time span including a predetermined time point after a transmission time when the random access preamble is transmitted, and the predetermined time point is obtained by adding an offset time to the random access preamble transmission time.