Radio communication device for restricting specific function and method for restricting the function
First Claim
1. A radio communication system comprising:
- a function control signal transmitting device, responsive to a call signal from a base station, for transmitting a function control signal having the same frequency as that of said call signal; and
a radio communication device for receiving said call signal and said function control signal, wherein said function control signal causes an error in said received call signal to control a predetermined function of said radio communication device.
2 Assignments
0 Petitions
Accused Products
Abstract
A radio communication device 7 existing in a function control area 3 receives both a call signal 4 from a base station and a function control signal 5 transmitted from a function control signal transmitting device 2. The call signal 4 and the function control signal 5 have the same frequency. The call signal 4 received is converted into a predetermined block format and constitutes predetermined frames during which data errors occurred in the predetermined block is counted. After the counting, the number of data errors occurred in the predetermined block is compared with a predetermined value. On the basis of the result of comparison, it is determined whether or not the radio communication device 7 exists in a function control area 3. When it is determined that the radio communication device 7 exists in the function control area 3, the function of the radio communication device 7 is controlled and restricted.
33 Citations
32 Claims
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1. A radio communication system comprising:
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a function control signal transmitting device, responsive to a call signal from a base station, for transmitting a function control signal having the same frequency as that of said call signal; and a radio communication device for receiving said call signal and said function control signal, wherein said function control signal causes an error in said received call signal to control a predetermined function of said radio communication device. - View Dependent Claims (2, 3, 8, 9, 10, 11, 12, 13, 14, 15)
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4. A radio communication system comprising:
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a function control signal transmitting device, responsive to a call signal from a base station, for transmitting a function control signal having the same frequency as that of said call signal; and a radio communication device for receiving said call signal and said function control signal, said radio communication device comprising a function control area determination means responsive to said call signal and said function control signal, for determining whether or not said radio communication device exists in function control area, wherein said function control area determination means comprises means for determining whether or not said radio communication device in said function control area on the basis of the number of data errors occurred in a predetermined block of said call signal. - View Dependent Claims (5, 6, 7)
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16. A radio communication system comprising:
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a function control signal transmitting device, responsive to a call signal from a base station, for transmitting a function control signal having the same frequency as that of said call signal; and a radio communication device for receiving said call signal and said function control signal, said radio communication device comprising; function control area determination means responsive to said call signal and said function control signal, for determining whether or not said radio communication device exists in function control area; and function control means for controlling a predetermined function of said radio communication device when said function control area determination means determines that said radio communication device exists in said function control area, wherein said function control area determination means comprises means for determining whether or not said radio communication device is in the function control area according to the number of data errors occurred in a predetermined codeword of said call signal. - View Dependent Claims (17, 18)
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19. A radio communication device comprising:
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receiving means for receiving a call signal from a base station and a function control signal transmitted from a function control signal transmitting device, said function control signal having the same frequency as that of said call signal; and control means for controlling a predetermined function of said radio communication device in correspondence with an error in the reception of said call signal generated by said function control signal. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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26. A control method for controlling a predetermined function of a radio communication device, the method comprising the steps of:
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receiving a call signal from a base station; receiving a judge block in said call signal; receiving another block in said call signal; and determining whether or not said radio communication device exists in a function control area, by receiving said judge block and said another block. - View Dependent Claims (27)
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28. A control method for controlling a predetermined function of a radio communication device, the method comprising the steps of:
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receiving a call signal from a base station; receiving a judge block in said call signal; counting data errors occurred in said judge block; receiving another block in said call signal; counting data errors occurred in said another block; and controlling a function of a radio communication device on the basis of the number of data errors occurred in said judge block and the number of data errors occurred in said another block. - View Dependent Claims (29)
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30. A control method for controlling a predetermined function of a radio communication device, the method comprising the steps of:
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receiving a call signal from a base station; determining whether it is a timing of a frame of said call signal to be received; synchronizing the frame by a sync code in said call signal; receiving a judge block in said call signal; counting data errors occurred in the judge block in said call signal; receiving another block of said call signal; counting data errors occurred in said another block in said call signal; comparing the number of data errors occurred in said judge block with a first predetermined value; comparing the number of data errors occurred in said another block with a second predetermined value; and controlling a function of a radio communication device on the basis of a result of the comparison.
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31. A radio communication system comprising:
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a function control signal transmitting device, responsive to a call signal from a base station, for transmitting a function control signal having the same frequency as that of said call signal; and a radio communication device comprising an alerting means for alerting a user of said call signal, said radio communication device receiving said call signal and said function control signal, said function control signal for generating intentional error in said received call signal, wherein when said radio communication device detects said intentional error said alerting means is disabled. - View Dependent Claims (32)
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Specification