Anti-collision method for contactless electronic module
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United States of America Patent
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May 30, 2006
Grant Date -
Jan 22, 2004
app pub date -
Jun 3, 2003
filing date -
Jun 4, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
An anti-collision method to identify and select contactless electronic modules (MDL) by a terminal is provided. A module may generate a random identification number prior to a communication, and respond to a general or complementary identification request on a time slot that varies according to its identification number. A non-selected module may generate a new random identification number when it receives a complementary identification request. Thus, the time slot of a non-selected module provided in response to a complementary identification request is not statistically the same as its time slot in response to a previous identification request, and it varies according to its identification number (ID).
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