The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 10, 2000
Filed:
Nov. 03, 1997
Shinichiro Iwata, Tokyo, JP;
NEC Corporation, Tokyo, JP;
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.