Patent ID: 7716208
Filing Date: 2010-05-11
Classification: G06K,Y10S

Abstract:
1. A method for operating an RFID reader comprising: transmitting a query command to a tag being powered by the RFID reader; receiving first handshake data including a first number from the tag, the first number being a random number that is being generated by the tag in response to the query command; in response to the receiving, extracting the first number from the first handshake data, transmitting a handshake command following the query command, the handshake command having second handshake data including the first number from the first handshake data sent in response to the preceding query command to the tag; and receiving tag identification data from the tag as a reply to the handshake command that follows the query command, wherein the method is configured to reduce time of tag inventorying while the tag is being powered and to reduce collisions between tags within a range of the RFID reader.