Patent ID: 8825068

Claim:
An electronic device for use in a communication system supporting carrier aggregation, comprising: circuitry configured to generate first information in response to a change in system information of the communication system; determine a first cell of a user equipment involved in the change in system information, wherein the first cell is one cell 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 transmit the first information to the user equipment via the first cell, wherein the change in system information comprises different system information for another component carrier of a second cell that also communicates with the user equipment while the first cell is communicating with the user equipment to increase the communication channel capacity to the user equipment, the first information comprises system information associated with the another component carrier, the first information further comprises system information comprising configuration information on downlink transmission bandwidth and information indicating downlink carrier frequency associated with the another component carrier.