Method and apparatus for transmitting/receiving control information for additional broadcast information in a wireless communication system

A method for transmitting control information for an additional broadcast message by a base station (BS) of a wireless communication system, the method comprising:

• transmitting, by the BS to a user equipment (UE), control information, the control information including a system configuration descriptor (SCD) count indicating version information of a system configuration to be applied for the UE;
• and
• transmitting, by the BS to the UE, the additional broadcast message, the additional broadcast message including a system configuration information and a configuration change count indicating version information of the system configuration information,
• wherein the additional broadcast message is an Advanced Air Interface System Configuration Descriptor (AAI_SCD) message,
• wherein the SCD count included in the transmitted control information is the same as the configuration change count included in the transmitted additional broadcast message,
• wherein the BS applies the system configuration information included in the additional broadcast message,
• wherein, if the SCD count included in the transmitted control information is different from a previous SCD count saved lastly at the UE and if the SCD count has not been applied yet in the UE, the UE applies a system configuration information associated with the previous SCD count saved lastly at the UE, and
• wherein, if the SCD count included in the transmitted control information is different from the previous SCD count saved lastly at the UE and if the SCD count has been applied in the UE, the UE applies the system configuration information included in the transmitted additional broadcast message.

A user equipment of a wireless communication system for receiving control information for an additional broadcast message, the user equipment comprising:

• a receiver;
• and
• a processor operatively connected to the receiver and configured to:
• receive, from a base station (BS), control information, the control information including a system configuration descriptor (SCD) count indicating version information of a system configuration to be applied for the user equipment;
• and
• receive, from the BS, the additional broadcast message, the additional broadcast message including a system configuration information and a configuration change count indicating version information of the system configuration information,
• wherein the additional broadcast message is an Advanced Air Interface System Configuration Descriptor (AAI_SCD) message,
• wherein the SCD count included in the received control information is the same as the configuration change count included in the received additional broadcast message,
• wherein the BS applies the system configuration information included in the additional broadcast message,
• wherein, if the SCD count included in the received control information is different from a previous SCD count saved lastly at the user equipment and if the SCD count has not been applied yet in the user equipment, the user equipment applies a system configuration information associated with the previous SCD count saved lastly at the user equipment, and
• wherein, if the SCD count included in the received control information is different from the previous SCD count saved lastly at the user equipment and if the SCD count has been applied in the user equipment, the user equipment applies the system configuration information included in the received additional broadcast message.

A base station of a wireless communication system for transmitting control information for an additional broadcast message, the base station comprising:

• a transmitter;
• and
• a processor operatively connected to the transmitter and configured to:
• transmit, to a user equipment (UE), control information, the control information including a system configuration descriptor (SCD) count indicating version information of a system configuration to be applied for the UE;
• and
• transmit, to the UE, the additional broadcast message, the additional broadcast message including a system configuration information and a configuration change count indicating version information of the system configuration information,
• wherein the additional broadcast message is an Advanced Air Interface System Configuration Descriptor (AAI_SCD) message,
• wherein the SCD count included in the transmitted control information is the same as the configuration change count included in the transmitted additional broadcast message,
• wherein the base station applies the system configuration information included in the additional broadcast message,
• wherein, if the SCD count included in the transmitted control information is different from a previous SCD count saved lastly at the UE and if the SCD count has not been applied yet in the UE, the UE applies a system configuration information associated with the previous SCD count saved lastly at the UE, and
• wherein, if the SCD count included in the transmitted control information is different from the previous SCD count saved lastly at the UE and if the SCD count has been applied in the UE, the UE applies the system configuration information included in the transmitted additional broadcast message.