A communications device used for control, comprising: a judging unit, configured to determine whether a communication node to which a target cell belongs needs to send data to user equipment or receive data from the user equipment; and a first indicating unit, configured to: when the judging unit determines that the communication node to which the target cell belongs needs to send the data to the user equipment or receive the data from the user equipment, indicate first information to the communication node to which the target cell belongs, wherein the first information is used to instruct the communication node to which the target cell belongs to send the data to the user equipment or receive the data from the user equipment by using a radio resource configuration of a first connection; wherein, the data comprises control plane signaling data of the user equipment or user plane service data of the user equipment, the first connection is a radio communication link that is used to carry the data and is established by the user equipment and a communication node to which a source cell belongs, and the target cell and the source cell are neighboring cells; wherein, the radio resource configuration of the first connection comprises a configuration of an RRC layer, a configuration of a PDCP layer, a configuration of an RLC layer, a configuration of a MAC layer, or a configuration of a physical layer; wherein, a fifth indicating unit is configured to instruct the user equipment to keep a packet data convergence protocol, PDCP, entity, an radio link control, RLC, entity, or a medium access control, MAC, entity of the first connection, wherein the PDCP entity, the RLC entity, or the MAC entity of the first connection is used by the user equipment to receive the data from the communication node to which the target cell belongs or send the data to the communication node to which the target cell belongs; wherein, a re-establishment of the physical layer, the MAC layer, the RLC layer, and the PDCP layer at the user equipment is not caused when a handover of the user equipment from the source cell to the target cell is performed. a judging unit, configured to determine whether a communication node to which a target cell belongs needs to send data to user equipment or receive data from the user equipment; and a first indicating unit, configured to: when the judging unit determines that the communication node to which the target cell belongs needs to send the data to the user equipment or receive the data from the user equipment, indicate first information to the communication node to which the target cell belongs, wherein the first information is used to instruct the communication node to which the target cell belongs to send the data to the user equipment or receive the data from the user equipment by using a radio resource configuration of a first connection; wherein, the data comprises control plane signaling data of the user equipment or user plane service data of the user equipment, the first connection is a radio communication link that is used to carry the data and is established by the user equipment and a communication node to which a source cell belongs, and the target cell and the source cell are neighboring cells; wherein, the radio resource configuration of the first connection comprises a configuration of an RRC layer, a configuration of a PDCP layer, a configuration of an RLC layer, a configuration of a MAC layer, or a configuration of a physical layer; wherein, a fifth indicating unit is configured to instruct the user equipment to keep a packet data convergence protocol, PDCP, entity, an radio link control, RLC, entity, or a medium access control, MAC, entity of the first connection, wherein the PDCP entity, the RLC entity, or the MAC entity of the first connection is used by the user equipment to receive the data from the communication node to which the target cell belongs or send the data to the communication node to which the target cell belongs; wherein, a re-establishment of the physical layer, the MAC layer, the RLC layer, and the PDCP layer at the user equipment is not caused when a handover of the user equipment from the source cell to the target cell is performed.