Transmission restricting device radio communication terminal equipment and transmission restricting system using these

• US 6,122,486 A
• Filed: 05/21/1998
• Issued: 09/19/2000
• Est. Priority Date: 05/21/1997
• Status: Expired due to Fees

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Tanaka, Masahiko, Okita, Kenji
• Primary Examiner(s): Bost, Dwayne D.
• Assistant Examiner(s): CONTEE, JOY KIMBERLY
• Application Number:
  US09/082,556
• Time in Patent Office: 852 Days
• Field of Search: 455/67.7, 455/68, 455/565, 455/550, 455/414, 455/424, 455/425, 455/433, 455/435, 455/410, 455/411, 455/456, 455/63, 455/88, 340/541, 340/547, 340/551, 340/573.1, 340/506, 342/457
• US Class Current: 455/68
• CPC Class Codes: H04B 1/38 Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
• CPC Class Codes: H04B 1/44 Transmit/receive switching
• CPC Class Codes: H04M 1/6041 Portable telephones adapted for handsfree use
• CPC Class Codes: H04M 1/66 with means for preventing unauthorised or fraudulent calling verifying user identity or authority in secret or secure digital communications H04L9/32
• CPC Class Codes: H04M 1/72457 according to geographic location
• CPC Class Codes: H04W 48/04 based on user or terminal location or mobility data, e.g. moving direction, speed

Abstract

Disclosed is a transmission restricting system which has a transmission interruption controlling means for generating and radiating a magnetic field pattern including a command code to command the transmission interruption to a radio communication terminal equipment in a radio-wave transmission-prohibited area, the transmission interruption controlling means being disposed at the entrance or exit of the radio-wave transmission-prohibited area; a transmission interruption releasing means for generating and radiating a magnetic field pattern including a command code to command the releasing of transmission interruption to the radio communication terminal equipment in the radio-wave transmission-prohibited area, the transmission interruption releasing means being disposed at the entrance or exit of the radio-wave transmission-prohibited area; and a radio communication terminal equipment comprising means for detecting a magnetic field pattern including a command code to command the transmission interruption or the releasing of transmission interruption, and means for controlling the process of the transmission interruption or the releasing of transmission interruption according to the result of the detection of the detecting means.

Claims

1. A transmission restricting device, comprising:

a transmission interruption controlling means for generating and radiating a magnetic field pattern including a command code to command the transmission interruption to a radio communication terminal equipment which normally can transmit radio-wave transmissions to prevent the transmission of radio-wave transmissions in a radio-wave transmission-prohibited area; and

a transmission interruption releasing means for generating and radiating a magnetic field pattern including a command code to command the releasing of transmission interruption to said radio communication terminal equipment to allow the transmission of radio-wave transmissions by the radio communication terminal equipment.

2. A transmission restricting device, according to claim 1, wherein:

said magnetic field pattern is generated according to a predetermined pattern to be stored in advance.

3. A radio communication terminal equipment, comprising:

means for detecting a magnetic field pattern including a command code to command the transmission interruption, to prevent the transmission of radio-wave transmissions by the radio communication terminal equipment, or the releasing of transmission interruption to allow the transmission of radio-wave transmissions by the radio communication equipment and

means for controlling the radio communication terminal equipment in the transmission interruption to prevent the transmission of radio-wave transmissions or the releasing of transmission interruption to allow the transmission of radio-wave transmissions according to the result of the detection of said detecting means.

4. A radio communication terminal equipment, according to claim 3, wherein:

said detecting means outputs the detection of the magnetic field pattern when said magnetic field pattern corresponds to a predetermined magnetic field pattern.

5. A radio communication terminal equipment, according to claim 3, wherein:

said detecting means is allowed to detect said magnetic field pattern even when the power source of said radio communication terminal equipment is turned off.

6. A radio communication terminal equipment, according to claim 4, wherein:

said detecting means is allowed to detect said magnetic field pattern even when the power source of said radio communication terminal equipment is turned off.

7. A transmission restricting system, comprising:

a transmission interruption controlling means for generating and radiating a magnetic field pattern including a command code to command the transmission interruption to a radio communication terminal equipment which normally can transmit radio-wave transmissions to prevent the transmission of radio-wave transmissions in a radio-wave transmission-prohibited area, said transmission interruption controlling means being disposed at the entrance or exit of said radio-wave transmission-prohibited area; and

a transmission interruption releasing means for generating and radiating a magnetic field pattern including a command code to command the releasing of transmission interruption to said radio communication terminal equipment to allow the transmission of radio-wave transmissions by the radio communication terminal equipment, said transmission interruption releasing means being disposed at the entrance or exit of said radio-wave transmission-prohibited area; and

a radio communication terminal equipment comprising means for detecting a magnetic field pattern including a command code to command the transmission interruption, to prevent the transmission of radio-wave transmissions by the radio communication terminal equipment, or the releasing of transmission interruption to allow the transmission of radio-wave transmissions by the radio communication terminal equipment and

means for controlling the radio communication terminal equipment in the transmission interruption to prevent the transmission of radio-wave transmissions or the releasing of transmission interruption to allow the transmission of radio-wave transmissions according to the result of the detection of said detecting means.

8. A transmission restricting system, according to claim 7, wherein:

said radio-wave transmission-prohibited area is the inside of a hospital or a vehicle.

9. A transmission restricting system, according to claim 7, wherein:

said transmission interruption releasing means has part to radiate the magnetic field pattern closer to said entrance or exit than that of said transmission interruption controlling means.

10. A transmission restricting system, according to claim 8, wherein:

said transmission interruption releasing means has part to radiate the magnetic field pattern closer to said entrance or exit than that of said transmission interruption controlling means.

11. A transmission restricting system, according to claim 7, further comprising means for monitoring the state of vehicle engine, wherein:

said radio-wave transmission-prohibited area is the inside of a vehicle, and said transmission interruption controlling means and said transmission interruption releasing means operates according to the result of the monitoring.

12. A transmission restricting system, according to claim 11, further comprising means for detecting the speed of said vehicle, wherein:

said transmission interruption controlling means and said transmission interruption releasing means operates according to the result of the detection of the vehicle speed.