A base station, comprising: a transceiving unit, configured to send first information to a second base station, or receive the first information sent by the second base station, wherein the first information is used for indicating that the second base station is to serve user equipment; and a first sending unit, configured to send second information to the user equipment, wherein the second information is used for instructing the user equipment to operate on a carrier corresponding to the second base station, for enabling the user equipment to operate on the carrier corresponding to the second base station after the user equipment receives the second information; wherein the base station is configured to interact with the user equipment by means of a carrier which is different from a carrier used by the second base station, and the base station is configured with a division of labor for the user equipment which is different from a division of labor for the user equipment of the second base station, wherein the base station is configured to be responsible for the control signaling of the user equipment and to be not responsible for the data signaling of the user equipment which is processed by the second base station; and the base station further comprises a second sending unit, configured to send third information to the user equipment, wherein the third information is used for instructing the user equipment to operate on a carrier corresponding to the base station, for enabling the user equipment to continue to operate on the carrier corresponding to the base station after the user equipment has operated on the carrier corresponding to the base station on a particular sub-frame and has detected the third information; and a fourth sending unit, configured to send information used for indicating the particular sub-frame to the second base station, for enabling the second base station not to send data to the user equipment on the particular sub-frame according to the information used for indicating the particular sub-frame. a transceiving unit, configured to send first information to a second base station, or receive the first information sent by the second base station, wherein the first information is used for indicating that the second base station is to serve user equipment; and a first sending unit, configured to send second information to the user equipment, wherein the second information is used for instructing the user equipment to operate on a carrier corresponding to the second base station, for enabling the user equipment to operate on the carrier corresponding to the second base station after the user equipment receives the second information; wherein the base station is configured to interact with the user equipment by means of a carrier which is different from a carrier used by the second base station, and the base station is configured with a division of labor for the user equipment which is different from a division of labor for the user equipment of the second base station, wherein the base station is configured to be responsible for the control signaling of the user equipment and to be not responsible for the data signaling of the user equipment which is processed by the second base station; and the base station further comprises a second sending unit, configured to send third information to the user equipment, wherein the third information is used for instructing the user equipment to operate on a carrier corresponding to the base station, for enabling the user equipment to continue to operate on the carrier corresponding to the base station after the user equipment has operated on the carrier corresponding to the base station on a particular sub-frame and has detected the third information; and a fourth sending unit, configured to send information used for indicating the particular sub-frame to the second base station, for enabling the second base station not to send data to the user equipment on the particular sub-frame according to the information used for indicating the particular sub-frame.