RFID reader and method for recognizing RFID tags

US10095892B2 · kind B2 · utility

Assignees

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE
• FRIEDRICH-ALEXANDER-UNIVERSITÄT ERLANGEN-NÜRNBERG · DE

Inventors

• Hazem Elsaid Ibrahim · Erlangen, DE
• Hamed Kenawy · Erlangen, DE
• Joerg Robert · Vreden, DE
• Albert Heuberger · Erlangen, DE
• Wolfram Strauss · Nuremberg, DE

Key dates

• Filing date: Feb 10, 2017
• Grant date: Oct 9, 2018
• Expiry date: Feb 10, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G06K7/10128
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

An RFID reader includes a transmitter, a receiver, and an evaluator. The receiver receives signals from RFID tags within a given number of slots of a time frame with a given frame size and provides a number of successful slots and a number of collided slots. The evaluator sets a modified frame size based on an estimated number of RFID tags which is determined based on the frame size, the number of successful slots, and the number of collided slots. The invention also refers to a corresponding method.