Method and apparatus for anti-collision tag in radio frequency identification (RFID) system
AssigneeSamsung Electronics Co., Ltd.
InventorHyun-Kuk Choi
Life of this patent
Estimating the term…
Abstract
A method and an apparatus for preventing tag collision in a Radio Frequency IDentification (RFID) system are provided. A method of a reader for preventing the tag collision in the RFID system includes modifying variables such that every tag responds in the same slot, measuring a power of tags received in the same slot, allocating slots by predicting the number of the tags based on the measured power, and reading the tags in the allocated slots.
Claims10
A method of a reader for preventing a tag collision in a Radio Frequency IDentification (RFID) system, the method comprising:
- modifying variables in a signal from the reader such that every tag that receives the signal responds in a same slot comprising a regular time interval such that all the received RFID tags collide in the slot;
- measuring a total power of the tags received in the same slot;
- predicting a number of the tags based on the measured power;
- allocating slots according to the predicted number;
- and
- reading the tags in the allocated slots.
An apparatus of a reader for preventing a tag collision in a Radio Frequency IDentification (RFID) system, the apparatus comprising:
- a controller for modifying variables in a signal from the reader such that every tag that receives the signal responds in a same slot comprising a regular time interval such that all the received RFID tags collide in the slot, for controlling to measure a total power of the received tags, for predicting a number of the tags based on the measured power, and for allocating slots according to the predicted number;
- and
- a power measurer for measuring the power of the received tags responding in the same slot.
Dependencies are inferred from the claim text.