Incoming cell control method and device for mobile communication device

An incoming call control device for a mobile communication device which selects a control channel by scanning a plurality of control channels, sets the mobile communication device to a standby state awaiting an incoming call signal to be transmitted from a base station over the selected control channel, and if an incoming call signal is received from the base station in the standby state, makes incoming call response to the received incoming call signal, thereby establishing a communication channel with the base station on the basis of a communication channel designation signal transmitted from the base station, comprising:

• incoming call responding means for transmitting an incoming call response signal to the base station in response to receiving an incoming call signal from the base station;
• incoming call response failure detecting means for detecting that incoming call response fails if no communication channel designation signal is received from the base station after an incoming call response signal is transmitted to the base station by the incoming call responding means;
• and
• control means for setting the mobile communication device to a predetermined state corresponding to the standby state without scanning the control channels if the incoming call response failure detecting means detects that the incoming call response fails.

A mobile communication device which selects a control channel by scanning a plurality of control channels, sets the mobile communication device to a standby state awaiting an incoming call signal to be transmitted from a base station over the selected control channel, and if an incoming call signal is received from the base station in the standby state, makes incoming call response to the received incoming call signal, thereby establishing a communication channel with the base station on the basis of a communication channel designation signal transmitted from the base station, comprising:

• incoming call responding means for transmitting an incoming call response signal to the base station in response to receiving an incoming call signal from the base station;
• incoming call response failure detecting means for detecting that incoming call response fails if no communication channel designation signal is received from the base station after an incoming call response signal is transmitted to the base station by the incoming call responding means;
• and
• control means for setting the mobile communication device to a predetermined state corresponding to the standby state without scanning the control channels if the incoming call response failure detecting means detects that the incoming call response fails.

A mobile communication device comprising:

• selecting means for selecting a control channel by scanning a plurality of control channels;
• first setting means for setting the mobile communication device to a standby state awaiting an incoming call signal to be transmitted from a base station over the selected control channel;
• receiving means for receiving the incoming call signal;
• transmitting means for transmitting an incoming call response signal in response to the received incoming call signal;
• detecting means for detecting whether a communication channel designation signal is received from the base station for a predetermined time period after the incoming call response signal is transmitted;
• and
• second setting means for setting the mobile communication device to a predetermined state corresponding to the standby state awaiting an incoming call signal to be transmitted from the base station over the selected control channel if the communication designation signal is not received for the predetermined time period.