| 摘要 |
A method and processor-readable storage medium for performing the method of identifying RF cards in a card reader's field. Polling requests (90) are sent to cards in a card reader's field. Where a clear response from the sent command is received from a responding card (100) , the response is saved (104) , the responding card moved to an Active state (106) , and the timeslot number incremented if possible (108) and the above steps repeated until no clear response is received. Where no clear response is received (100) , a determination of whether a collision has occurred is made (110) . If no collision occurred, the timeslot number is incremented (108) ; if a collision did occur, another polling request is sent (86) . Discovered cards are returned when no cards or collisions are detected after every timeslot is polled (122) .
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