An MBMS coordination entity (110, 410, 810), MCE, providing a broadcast service in a mobile communication system, comprising: a communication unit configured to transmit and receive a signal; and a controller configured to control: transmitting a terminal counting request message to at least one base station (121-125, 420, 820, 1200) in a multicast broadcast single frequency network, MBSFN, area, receiving a counting result message including information on the number of terminals receiving a multimedia broadcast multicast service, MBMS, session for each cell of the at least one base station from the at least one base station, and determining MBMS resource allocation for each cell in the MBSFN area, wherein the determining comprises: determining MBMS resource allocation for each cell in the MBSFN area based on the counting result message, and determining whether to use a resource, which is not allocated in the determined MBMS resource allocation, for unicast transmission or not to use it for transmission, based on interference information between each cell in the MBSFN area. a communication unit configured to transmit and receive a signal; and a controller configured to control: transmitting a terminal counting request message to at least one base station (121-125, 420, 820, 1200) in a multicast broadcast single frequency network, MBSFN, area, receiving a counting result message including information on the number of terminals receiving a multimedia broadcast multicast service, MBMS, session for each cell of the at least one base station from the at least one base station, and determining MBMS resource allocation for each cell in the MBSFN area, wherein the determining comprises: determining MBMS resource allocation for each cell in the MBSFN area based on the counting result message, and determining whether to use a resource, which is not allocated in the determined MBMS resource allocation, for unicast transmission or not to use it for transmission, based on interference information between each cell in the MBSFN area. transmitting a terminal counting request message to at least one base station (121-125, 420, 820, 1200) in a multicast broadcast single frequency network, MBSFN, area, receiving a counting result message including information on the number of terminals receiving a multimedia broadcast multicast service, MBMS, session for each cell of the at least one base station from the at least one base station, and determining MBMS resource allocation for each cell in the MBSFN area, wherein the determining comprises: determining MBMS resource allocation for each cell in the MBSFN area based on the counting result message, and determining whether to use a resource, which is not allocated in the determined MBMS resource allocation, for unicast transmission or not to use it for transmission, based on interference information between each cell in the MBSFN area. determining MBMS resource allocation for each cell in the MBSFN area based on the counting result message, and determining whether to use a resource, which is not allocated in the determined MBMS resource allocation, for unicast transmission or not to use it for transmission, based on interference information between each cell in the MBSFN area.