Apparatus and method for transmitting control information for continuous mbms service

A method for transmitting control information for continuity of a multimedia broadcast multicast service (MBMS) service by a user equipment (UE), which performs handover from a source base station (BS) to a target BS, the method comprising:

• generating a measurement report regarding a source cell and a target cell;
• transmitting the measurement report to the source BS;
• receiving a radio resource control (RRC) connection reconfiguration message from the source BS;
• reconfiguring an RRC connection on the basis of the RRC connection reconfiguration message;
• generating an RRC connection reconfiguration complete message including at least one of a flag indicating whether an MBMS service is received and active MBMS service information indicating a type of the MBMS service;
• and
• transmitting the RRC connection reconfiguration complete message to the target BS.

A target base station (BS) to provide continuity of a multimedia broadcast multicast service (MBMS) service with respect to user equipment (UE), the target BS comprising:

• a target processor configured to generate an MBMS information request message for requesting at least one of information regarding whether the UE receives an MBMS service, information regarding a type of the MBMS service, and information regarding a cell in which the MBMS service is transmitted, from the UE, and to generate an MBMS point-to-multipoint radio bearer (MRB) initiation message indicating that the MBMS service is provided to the UE through an MRB as a bearer for an MBMS;
• a target transmission unit configured to transmit the MBMS information request message or the MRB initiation message to the UE;
• and
• a target reception unit configured to receive an MBMS information response message including at least one of information regarding whether the UE receives an MBMS service, information regarding a type of the MBMS service, and information regarding a cell in which the MBMS service is transmitted, from the UE, as a response with respect to the MBMS information request message.

A method for providing continuity of a multimedia broadcast multicast service (MBMS) service by a target base station (BS) with respect to a user equipment (UE), the method comprising:

• transmitting, to the UE, an MBMS information request message for requesting at least one of information regarding whether the UE receives an MBMS service, information regarding a type of the MBMS service, and information regarding a cell in which the MBMS service is transmitted from the UE;
• receiving an MBMS information response message including at least one of information regarding whether the UE receives an MBMS service, information regarding a type of the MBMS service, and information regarding a cell in which the MBMS service is transmitted, from the UE, as a response with respect to the MBMS information request message;
• and
• transmitting an MBMS point-to-multipoint radio bearer (MRB) initiation message indicating that the MBMS service is provided to the UE through an MRB as a bearer for an MBMS.