Utilization management system of portable telephone

• US 5,991,614 A
• Filed: 12/04/1997
• Issued: 11/23/1999
• Est. Priority Date: 05/30/1997
• Status: Expired due to Fees

• Current Assignee: OKI Electric Industry Company Limited
• Original Assignee: OKI Electric Industry Company Limited
• Inventors: Oura, Hideto
• Primary Examiner(s): Chin, Wellington
• Assistant Examiner(s): Jackson, Blane J.
• Application Number:
  US08/985,188
• Time in Patent Office: 719 Days
• Field of Search: 455/404, 455/410, 455/411, 455/134, 455/456, 340/539, 342/457
• US Class Current: 455/404.1
• CPC Class Codes: H04W 48/04 based on user or terminal location or mobility data, e.g. moving direction, speed

Abstract

The shielded area 3 which is shielded from radio waves is provided at the entrance to the protected area 1, for example, installed with medical equipment. The transmitter 6 in the shielded area 3 transmits the control signal 11 to the portable telephone 5, which returns the response signal 12 in response to the control signal 11. The receiver 7 receives the response signal 12 to notify the alarm 8 that the portable telephone 5 in operation. Thus, the alarm indicative of turning off the portable telephone 5 urges the holder 2 thereof not to carry the portable telephone 5 into the protected area 1.

Claims

1. A utilization management system of portable telephone comprising:

a shielded area shielded from electromagnetic wave, provided at an entrance of a protected area inhibiting use of the portable telephone;

a transmitter, provided in the shielded area, transmitting a given control signal requesting the portable telephone for a response signal;

a receiver receiving the response from the portable telephone; and

an alarm unit raising an alarm to a holder of the portable telephone in response to the response signal.

2. A utilization management system of portable telephone as set forth in claim 1, wherein the transmitter transmits to the portable telephone the control signal indicating an entry into a management area different from an external of the shielded area in the shielded area;

the receiver receives a position registration call that the portable telephone originates in response to the control signal upon entering the different management area; and

the alarm unit raises the alarm to the holder of the portable telephone upon receipt of the position registration call therefrom.

3. A utilization management system of portable telephone comprising:

a shielded area shielded from electromagnetic wave, provided at an entrance of a protected area inhibiting use of the portable telephone;

a transmitter transmitting a given control signal to the portable telephone in the shielded area; and

a power supply cutoff circuit, provided in the portable telephone, cutting off a power supply for operation of the portable telephone in response to the control signal.

4. A utilization management system of portable telephone comprising:

a shielded area shielded from electromagnetic wave, provided at an entrance of a protected area inhibiting use of the portable telephone;

a transmitter transmitting a given control signal to the portable telephone in the shielded area; and

a transmission inhibit circuit, provided in the portable telephone, inhibiting transmission of the portable telephone upon receipt of the control signal.