EPC communication improvement method based on CRFID tag

Abstract

The invention relates to a method for optimizing an EPC radio frequency communication protocol, in particular to an EPC communication improvement method based on a CRFID tag. The method comprises an improvement method of a downlink in a physical layer, an improvement method of an inventory stage in an MAC layer and an improvement method of an access stage; the improvement method of the downlink inthe physical layer comprises: adding a DC component to the signal of the downlink, and adopting a POW carrier method for the signal; the improvement method of the inventory stage in the MAC layer comprises: sampling a power supply module in a microprocessor, directly mapping the sampled voltage value to a time slot, and transmitting data to a reader according to the time slot via the tag; and theimprovement method of the access stage in the MAC layer comprises: using the CRC as a sentence handle to send read to the tag by the reader, transmitting data with a suitable length to the reader bythe tag after receiving the read, and reducing the data size of wrong retransmission by adopting a method combining data and address. The EPC radio frequency communication protocol improved by the method has a downlink with higher energy, energy management with high efficiency and a simple access command.

Description

technical field [0001] The invention relates to an optimization method of the EPC radio frequency communication protocol, in particular to a method for improving the EPC protocol based on a CRFID tag. Background technique [0002] Active and semi-passive tags have a power supply and a processor, which can perform a certain degree of calculation. However, regular maintenance and replacement of the power supply is required, and the hardware cost is high, so it has not been widely used. Passive tags work by collecting the carrier signal emitted by the reader, and do not need to replace the battery, so they are widely used in item counting, transportation, tracking, and other application scenarios such as medical and anti-theft fields. CRFID tags have the dual advantages of source tag computing power and passive tag passivity, and also integrate sensors, which have broad application prospects and have become a research hotspot in academia. Passive computable CRFID tags follow t...

AI Technical Summary

Problems solved by technology

Passive computable CRFID tags follow the EPC radio frequency communication protocol, and the EPC radio frequency communication protocol is applied to passive sensing platforms such as WISP, which can provide good communication energy for computable RFID tags and improve throughput, but the energy problem is passive computable The bottleneck of CRFID tag development is that its communication distance is far inferior to that of traditional RFID tags, and the increase in energy consumption causes CRFID tags to switch frequently between waking and sleeping, and the effective throughput of communication will also decrease accordingly.

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