Label anti-collision method and active radio frequency identifying label

Abstract

The application discloses a label anti-collision method and an active radio frequency identifying label. The method is applied to the active radio frequency identifying label. The label anti-collision includes steps of S11, sending data information; waiting to receive an answer signal responding to the data information; if the answer signal is not received, entering step S12; S12m detecting a carrier wave; if the carrier wave is detected, entering step S13; S13, delaying the preset time, and detecting the carrier wave again; S14, if the carrier wave is not detected, entering step S11; if the carrier wave is detected, entering the step S13. By comparing with the traditional ALOHA algorithm that the data information is sent after delaying the preset time, it is obvious that the label anti-collision method further reduces the collision ratio of the ALOHA algorithm and improves the communication efficiency since the carrier wave is detected after delaying the preset time, and the data information of the next time is sent under the condition of no carrier wave detected.

Description

technical field [0001] The invention relates to the technical field of electronic information, in particular to a tag anti-collision method and an active radio frequency identification tag. Background technique [0002] Radio Frequency Identification (RFID) technology is a new automatic identification technology developed in the 1980s. As one of the core technologies of the Internet of Things world, its biggest advantage is non-contact identification, which can read and write information in target tags through obstacles such as ice, fog, and dust paint. Compared with passive RFID tags, active RFID tags have long recognition distance, fast reading and writing speed, and large information storage capacity. They have great application potential in long-distance identification fields such as smart hospitals, smart parking lots, smart transportation, and smart cities. [0003] At present, most of the researches on active RFID systems focus on anti-collision algorithms and applic...

AI Technical Summary

Problems solved by technology

This algorithm is simple, but the throughput rate is low,

[0008] The main reason for the low efficiency of the algorithm is that the collision occurs at random times, including: when a tag is in the process of communicating with the reader, it may be destroyed by the sudden response of other tags, that is, there is a partial collision problem

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