Patent ID: 8526964

Claim:
A method of providing system information in a communication system supporting carrier aggregation, comprising: generating, when there is a change in system information of the communication system, first information which comprises information indicating that there is a change in system information; determining a first cell of a user equipment involved in the change in system information, wherein the first cell is one of cells to which the user equipment is connected and corresponds to a component carrier which is being used by the user equipment and is kept in connection with a base station of the communication system; and transmitting the first information to the user equipment via the first cell, wherein the change in system information comprises adding a component carrier for the user equipment, the first information further comprises system information associated with the component carrier to be added, and transmitting the first information to the user equipment via the first cell comprises encapsulating the first information in a second dedicated signaling and transmitting the second dedicated signaling to the user equipment via the first cell, the first information further comprises system information comprising configuration information on transmission bandwidth and information indicating frequency bands associated with the component carrier to be added, and when the component carrier to be added is for downlink transmission, the system information further comprises configuration information for downlink channels of the component carrier to be added.