Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for Stable Reverse Link Data Rate of Radio Frequency Identification Tag Chip

A radio frequency identification tag and reverse link technology, applied in the field of stable reverse link data rate of radio frequency identification tag chips, to achieve the effect of low system power consumption

Active Publication Date: 2016-06-29
SHANGHAI QUANRAY ELECTRONICS +1
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that in the prior art, the two goals of reducing the reverse link data rate error and reducing system power consumption are mutually restrictive

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for Stable Reverse Link Data Rate of Radio Frequency Identification Tag Chip
  • Method for Stable Reverse Link Data Rate of Radio Frequency Identification Tag Chip
  • Method for Stable Reverse Link Data Rate of Radio Frequency Identification Tag Chip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0028] In this embodiment, there are 4 clock oscillators on the ISO protocol tag chip. During the power-on stage of the chip, the 4 oscillators start to oscillate and output 4 different oscillation frequencies, which are f1=0.9MHz, f2=0.98MHz, f3=1.04MHz, f4=1.12MHz. At the initial stage of a communication, the reader sends a Query command to the tag chip, which contains link parameters DR=8, TRcal=25us. Expected value of reverse link data rate according to ISO protocol At this frequency point, the protocol allows the upper and lower limits of the error of the actual returned data rate to be ±10%.

[0029] After the tag chip confirms the two parameters of DR and TRcal, the division operation is performed first. In the hardware implementation of this embodiment, the division operation is completed by sampling, that is, four clocks f1 to f4 are used to sample the time length of TRcal respectively, and four sampling times are obtained: Q1=22, Q2=24, Q3= 26, Q4=28. Divide the n...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for stabilizing the reverse link data rate of an ISO / IEC18000-6C radio frequency identification tag chip, comprising: introducing more than two low-frequency clock oscillators with different frequencies into the radio frequency identification tag chip ; Select the optimal clock oscillator: After the tag chip receives the first Query command sent by the reader, according to the DR and TR of the first Query command cal Two link parameters, select a clock oscillator that can minimize the error between the actual reverse link data rate and the expected value as the main clock of the system, and turn off the other oscillators to reduce system power consumption. The invention can reduce the minimum clock frequency allowed by the system and reduce the power consumption of the chip.

Description

technical field [0001] The invention relates to an integrated circuit, in particular to a method for stabilizing the reverse link data rate of a radio frequency identification tag chip conforming to the ISO / IEC18000-6C protocol. Background technique [0002] Radio frequency identification technology is one of the hot spots in the development of consumer electronics products in recent years. It has broad application prospects in the fields of identification, logistics management, warehousing, retail and anti-counterfeiting. The ISO / IEC18000-6C protocol (hereinafter referred to as "ISO protocol") is an international general standard for radio frequency identification technology in the UHF frequency band, and has been widely recognized by chip manufacturers, equipment suppliers and end users. [0003] One of the difficulties in the design of ISO protocol tag chips is how to achieve a small reverse link data rate (BLF: BackscatterLink Frequency) error under extremely strict powe...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G06K7/00
Inventor 车文毅杨晓飞
Owner SHANGHAI QUANRAY ELECTRONICS