Cooperative anti-collision algorithm based on relay sensor in RFID system

To the RFID system,Multiple reader and transponders deployed to meet the diversity applications, heterogeneous networks, diversity of service application system, lead to the decline of recognition, data transmission delay and signal integrity performance problems. Collaborative anti-collision algorithm suitable for multi-reader and transponder system based on relay sensor is studied. Firstly, proposed an effective scheme of relay sensor structure by combining with the impact of the data and the weight of effect, then, design the suitable peripheral circuits; finally, presents the collaborative anti-collision algorithm based on the relay sensor of the system covers the signal area of three kinds of radiation element convergence. The test results show that the proposed algorithm is superior to the traditional ALOHA algorithm in the read time slot and transmission delay, etc. Introduction In the RFID system[1],the important factors affecting the integrity of the data transmission is more than one transponder compete the wireless channel at the same time, then leads to the reader can't confirm the data source, and occur the data collision [2].Thus, in the reader detection range, the multiple transponders need to eliminate other signal interference by identifying the correct signal, and establish the right, stable and reliable communication between the reader and transponder [3], become the key issues in application of RFID system. During the multiple reader session,Fyhn. K and others [4] improved the reliability of marking probability estimation based on the actual tree anti-collision protocol integration and reliable markers algorithm. The literature [5] combined with the key factor affecting the recognition rate of the RFID system. The Document [6] optimized the search efficiency to reduce the system idle rate. The literature [7] proposed the tire embedded uhf passive RFID system power transmission model. According to solve the multi class applications, diversity of service application problems of the multiple reader colliding with data in the RFID system, a collaborative anti-collision mechanism based on relay sensor is studied in this paper for a suitable for RFID system. The main work is as follows:(1)Design a relay sensor that can avoid data collision;(2) Design the sensor peripheral circuits in RFID system relay sensor collaboration;(3)Based on the signal of heterogeneous radiation element in system working area,through relay sensor converge, then put forward a collaborative anti-collision algorithm based on. Relay sensor of the RFID system The traditional RFID system including the transponder, reader and diversity of high-level application. For the diversity of complex applications often appear in the data communication between reader and responder. The data collision problems is serious, which results in a decline in the efficiency and accuracy of identification of the transponder. Assuming that the RFID system, the data collision probability is Pt, which can be divided into the following three kinds of situations: The data collision between the same transponder and multiple reader, the probability is 3rd International Conference on Materials Engineering, Manufacturing Technology and Control (ICMEMTC 2016) © 2016. The authors Published by Atlantis Press 1730 denoted as 1 c P ; The data collision between the same reader and multiple transponder, the probability is denoted as 2 c P ; the data collision between n readers and m transponders, the probability is denoted as 3 c P .As a result, from the perspective of probability distribution, the data collisions in the RFID system is shown in formula (1).