Patent ID: 7561880

Claim:
A radio controller of a mobile communications system performing broadcasting or multicasting that transmits same information to a plurality of cells, the radio controller comprising: a control information comparison part configured to compare control information of a first one of the cells and control information of a second one of the cells adjacent to the first one of the cells; a control information creation part configured to create adjacent cell control information corresponding to the second one of the cells by determining part of the control information of the second one of the cells which part is different from the control information of the first one of the cells as the adjacent cell control information; and an identifier assignment part configured to form one or more cell groups, each of one or more of the cells equal in control information thereof and to assign the cell groups respective identifiers, wherein the control information creation part creates the adjacent cell control information for the second one of the cells when one of the identifiers assigned to the first one of the cells is different from one of the identifiers assigned to the second one of the cells, the control information comprises Multimedia Broadcast Multicast Service (MBMS) Radio Bearer Information, the MBMS Radio Bearer Information comprises setting information of MBMS Traffic Channel, and the setting information of the MBMS Traffic Channel comprises a space time transmission diversity indicator, a spreading factor in a physical layer, a spreading code number in the physical layer, a transport format combination set, and a transport format set.