Patent ID: 8880029

Claim:
A wireless communication system comprising: a wireless base station which communicates with a mobile communication terminal; a core network apparatus which comprises a higher-level apparatus of the wireless base station; a gateway which relays between the wireless base station and the core network apparatus; and an SMS mail server which is connected to the core network apparatus, wherein the wireless base station comprises: a call transmission and reception number acquiring unit that acquires call transmission and reception number information from a call setting request signal sent from the core network apparatus after detecting a voice call reception to the mobile communication terminal within a communication service area or a voice call transmission from the mobile communication terminal within the communication service area; a determination unit that determines whether to stop voice call reception processing or voice call transmission processing with reference to determination information; and a signal processing unit that informs the core network apparatus of a message including a determination result when the determination unit determines to stop the processing, the signal processing unit sends a control signal including the call transmission and reception number acquired by the call transmission and reception number acquiring unit to the SMS mail server through the core network apparatus, and the SMS mail server performs at least one of a receiver side SMS delivery control and a caller side SMS delivery control based on the control signal, the receiver side SMS delivery control being a control in which the SMS mail server informs the mobile communication terminal having received an incoming call of a stop of the voice call reception processing, the caller side SMS delivery control being a control in which the SMS mail server informs a terminal of a caller of a stop of the voice call transmission processing.