发明名称 |
Enhanced identification system |
摘要 |
A method and an identification system us for communicating between a reader and a plurality of transponders. The reader has a transmitter for transmitting a signal and each transponder includes a receiver for receiving the reader signal and a transmitter for generating a transponder signal. When the reader recognises a transponder signal from one of the transponders it immediately issues a mute instruction, muting all other active transponders and passing control to the said transponder, without the need for a specifically timed acknowledgement to the said controlling transponder. The reader may issue a single disable/wakeup instruction which disables the controlling transponder returning control to the reader and reactivated all muted (but not disabled) transponders.
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申请公布号 |
US6661336(B1) |
申请公布日期 |
2003.12.09 |
申请号 |
US19990415234 |
申请日期 |
1999.10.12 |
申请人 |
BTG INTERNATIONAL LIMITED |
发明人 |
ATKINS RAYMOND CATHERALL;MARAIS MARIO ALPHONSO;SMIT HENDRIK VAN ZYL |
分类号 |
G06K19/07;G06K7/00;G06K7/08;G06K7/10;G06K17/00;H04B1/59;H04B5/02;(IPC1-7):H04Q5/22 |
主分类号 |
G06K19/07 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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