Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Patent
1997-11-03
2000-10-10
Hunter, Daniel S.
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
455 311, 455 312, 34082544, H04B 140
Patent
active
06131045&
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.
REFERENCES:
patent: 4904992 (1990-02-01), Grothause
patent: 5224150 (1993-06-01), Neustein
patent: 5513241 (1996-04-01), Dimitiadis et al.
patent: 5805077 (1998-09-01), Fawcett
European Office Action.
Gantt Alan T.
Hunter Daniel S.
NEC Corporation
Woods, LLP McGuire
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