A Tag Prediction Algorithm using Upper Bit in RFID systems

In RFID (Radio Frequency IDentification) system, the reader needs the anti collision algorithm for fast identifying all of the tags in the interrogation zone. This paper proposes the tree based Tag Prediction Algorithm using Upper Bit (TPAUB) to arbitrate the tag collision. A TPAUB can identify tags without identifying all the bits in the tag ID. The reader uses the upper bit which is added to the tag ID and if there are two collided bits or multiple collided bits, it checks the upper bit and grasps the number the number of identified dasia1psilas. A TPAUB can reduce the number of the requests transmitted from the reader, thus it shortens the time of identifying all of the tags in the interrogation zone.