摘要 |
The invention discloses a method of identifying a plurality of transponders (1, 2, 3) in an interrogation comprising transmitting an interrogation signal to the transponders (1, 2, 3) and receiving at a reader (10) response signals from the transponders (1, 2, 3). Each transponder (1, 2, 3) is capable of transmitting the response signal at any time during a waiting period and may alter the maximum length of the waiting period during the interrogation process.
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