Research On RFID Anti Collision Algorithm With High Time And Energy Eifficiencf

Radio frequency identification(RFID)technology is a kind of data transmission technology using radio frequency signal through electromagnetic backscattering or inductive coupling,which is an important part of IoT technology.Compared with the traditional automatic identification system,RFID has the characteristics of long reading distance,strong penetration ability,high processing efficiency,large storage capacity,reusable,and can identify objects in high-speed movement.It is widely used in many fields,such as industry,commercial automation and traffic control management.RFID system can read a large number of tags in time by tag anti-collision algorithm,which is a major advantage of RFID system compared with other non-contact reading systems.In the past,the research on RFID tag anti-collision algorithm often assumes that tags are carried out in a static scene,and the research focuses on how to reduce the number of collision time slots and empty time slots in the reading process and improve the response of a single tag In order to improve the reading efficiency.However,in the actual RFID application scenarios,such as vehicle management,asset management,postal parcel sorting,warehouse management,tags often move with the identified items.The number of RFID tags to be read in the mobile scenario is a dynamic process,and its location distribution in the space presents a certain distribution law with the identified items How to optimize the RFID tag anti-collision process has not been well studied.This paper studies the RFID anti-collision algorithm in the mobile scene,studies how to estimate the spatial distribution position of tags through a small number of time slots or frame interaction,and proposes a dynamic anti-collision algorithm combined with the adaptive adjustment of the reader's transmitting power,so as to realize the high-efficiency and energy-saving RFID tag anti-collision reading in the actual mobile application scene of RFID.Firstly,this paper introduces the relevant standards and working principle of RFID system,and constructs the energy consumption model of anti-collision process based on RFID communication air port protocol,and analyzes and compares the energy consumption of common anti-collision algorithms by simulation.Then,according to the time slot information and energy intensity received by the reader in the mobile RFID reading scene,an estimation algorithm of the distribution mode within the recognition range of the reader is proposed,and the performance of the estimation algorithm is simulated and analyzed.Finally,a tag anti-collision algorithm based on tag distribution estimation and reader power adaptive is proposed,and the energy consumption and time efficiency of the algorithm are simulated and analyzed.Compared with the traditional dynamic frame length Aloha algorithm,the energy consumption efficiency of the algorithm is improved by more than 140%with a small increase in time consumption,and with the increase of the number of tags,the performance of the algorithm is reduced The performance of low energy consumption has been improved.