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RFID+ Exam Cram by Robert Sabella, Eva Zeisel, Mark Brown

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Interrogation Zone Considerations

Special considerations should be addressed when setting up an RFID system with multiple interrogators that have overlapping interrogation zones. You can deal with these types of situations in several ways, such as using dense interrogator mode, interrogator synchronization, arbitration, and anticollision protocols. Some of these features are only available with Generation 2 devices.

Dense Interrogator Mode

Dense interrogator mode, also called dense reader mode, provides each interrogator the capability to operate at a slightly different frequency, which helps reduce the radio interference between interrogators. Other techniques are used as well, such as Listen Before Talk (LBT), frequency hopping, or a combination ...

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