发明授权
US06377791B2 Method and system for identifying an illegal terminal in a cellular radio system
有权
用于识别蜂窝无线电系统中的非法终端的方法和系统
- 专利标题： Method and system for identifying an illegal terminal in a cellular radio system
- 专利标题（中）： 用于识别蜂窝无线电系统中的非法终端的方法和系统
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申请号： US09167460申请日： 1998-10-06
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公开(公告)号： US06377791B2公开(公告)日： 2002-04-23
- 发明人: Hannu Pirilä
- 申请人： Hannu Pirilä
- 优先权： FI973909 19971008
- 主分类号： H04M166
- IPC分类号： H04M166
摘要：
A cellular radio system comprises terminals (401, 402) arranged to transmit a specific message of a predetermined form at least two times (408, 409; 413, 414), so that there is a predetermined time-out between the two successive messages of said form. A message of said form, which is received from a terminal, is attached (503, 507, 509) to a code representing the terminal in order to identify an illegal terminal. Such a terminal is regarded as identified (513, 514) for which the time between the reception of the two successive messages of said form attached to the code representing the terminal is shorter than said time-out.