CN101685492A - RFID communication model air interface parameter testing method - Google Patents
RFID communication model air interface parameter testing method Download PDFInfo
- Publication number
- CN101685492A CN101685492A CN200810198912A CN200810198912A CN101685492A CN 101685492 A CN101685492 A CN 101685492A CN 200810198912 A CN200810198912 A CN 200810198912A CN 200810198912 A CN200810198912 A CN 200810198912A CN 101685492 A CN101685492 A CN 101685492A
- Authority
- CN
- China
- Prior art keywords
- rfid
- label
- air interface
- testing
- write line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Monitoring And Testing Of Transmission In General (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
A radio frequency identification (RFID) communication model air interface parameter testing method of the invention relates to the RFID, a current radar model air interface parameter definition and atesting method, and the invention mainly pays attention to parameters like wave forms, time, radar sections and the like. The invention provides two communication models of RFID writing and reading (the reading model is shown in the figure) and pays attention to related system device capacity. The method comprises parameter definitions and testing methods like sensitivity of label writing and reading, transmitted power, transceiving gain, receiving sensitivity of a reader and degree of symmetry of uplink and downlink channels. The invention provides a quoted auxiliary radio frequency identification, which is a method for determining the detected radio frequency identification and the reader parameter through reckoning by parameter testing. The invention is applicable to the RFID air interface working in far-field electromagnetic field, comprising quality assessment of products in each frequency range of UHF and MW, design improvement and application engineering design.
Description
Technical field
The invention belongs to automatic identification field, be in particular UHF and more in the research, design, production of high band radio-frequency (RF) identification (RFID) air interface, the quality examination of product air interface parameters is done to detect and check is used.
Background technology
Radio-frequency (RF) identification (RFID) technology is gone through decades and is fermented, and its working frequency range to high frequency, arrives ultrahigh frequency and microwave by low frequency again.In recent years, low frequency has become ripe to high frequency.Begin to welcome extensive widespread use.UHF and more high band be in the technology growth phase, no matter be the device design technology, the system applies technology, and even metric system is established a capital also among development.
Radio-frequency (RF) identification (RFID) promptly will form a big industry.UHF reaches more, and high band RFID will expand the application of RFID greatly because its operating distance is far away.
Have the air interface communication parameter and standard ISO/IEC18000-6 of UHF radio-frequency (RF) identification (RFID) system etc. in the world now, and corresponding conformance test method standard ISO/IEC 18047-6 etc. has been arranged.But the parameter-definition of these standards and method of testing all are to be derived from radar mockup.In radar mockup, think that electronic tag only is an object that is detected that radio signal is played reflection (or claiming back scattering) effect.This realizes radio signal reception, demodulation to having, calls that data are modulated and the electronic tag of emission function and should carry out wireless writing again, carries out the rfid system groundwork mechanism of reading of data again and misfits.Therefore its application is limited to.For example, stipulate clearly among the ISO 18000-6 that this standard only is applicable to passive electronic label, read write line is said situation earlier.In fact, also fail to comprise for the write operation function of passive electronic label.
Because existing UHF RFID air interface communication parameter and standard comes from radar mockup, its parameter of paying close attention to is a waveform parameter, modulating characteristic parameter, signal time of return and RCS etc.Complete and general radar detection matches.
It is considered herein that by physical Concept Analysis, UHF and more high band RFID air interface should set up the communication test parameter with traffic model.Can help estimating label and read-write equipment quality like this, improve the product technology design, help engineering and use.System that these are important and device parameter comprise the read signal receiving sensitivity of electronic tag to read write line, write signal receiving sensitivity, emissive power, rf gain, read write line receiving sensitivity, forward and reverse junction device ability symmetry etc.Defined these of the present invention come from the parameter and the method for testing of traffic model, are applicable to all kinds of electronic tags (or be called for short label), and all kinds of read write lines, read write line say earlier, and label such as says earlier at various situations; Be applicable to the rfid system of far zone field environmental work, comprise VHF, UHF, each frequency range of MW.
The present invention has provided definition of radio-frequency (RF) identification (RFID) traffic model air interface parameters and method of testing.
Summary of the invention
Application demand of the present invention come from UHF and more in high band radio-frequency (RF) identification (RFID) air interface system, equipment research, design, the production to the detection and the check of its parameter.
1. the present invention has provided radio-frequency (RF) identification (RFID) traffic model air interface test parameter: the relevant parameter-definition with read write line of the radio-frequency (RF) identification that the present invention provides (RFID) electronic tag (abbreviation label).
2. the present invention proposes a kind of method of testing, promptly introduce special-purpose auxiliary electron label, by loss test to backward channel, and systematic parameter such as contact system loss, through calculating, determine the relevant radio frequency parameter of tested electronic tag with read write line.
3. the present invention has provided and has been the test of RFID traffic model air interface parameters used auxiliary electron label and the main technical requirements of testing read write line.
4. the present invention has provided the main technical requirements for the used rfid interrogator of radio-frequency (RF) identification (RFID) traffic model air interface parameters test.
Traffic model and corresponding air interface parameters are estimated RFID air interface equipment performance, and the value that technological improvement and engineering are used is as follows:
1) is convenient to estimate read write line and electronic tag level.As the read write line receiving sensitivity, electronic tag writes and reads receiving sensitivity and electronic tag emissive power, after the symmetry index of up-downgoing path, just can distinguish and estimate the technology status of each link in the air interface system.
2) be convenient to improve the electronic tag design.After the parameter system that traffic model sets up has been arranged, be convenient to designer's analytical electron label technique situation, find the direction of technological improvement.
3) be convenient to predict the air interface applies effect.After the parameter system that traffic model sets up has been arranged, be operated in the situation of far zone field,, just can predict the result of use under the actual service conditions more easily according to the system equipment ability based on the RFID air interface.Adapt to the design of change request Adjustment System when using technical thought is provided for the scene.
4) the defined parameter of RFID traffic model of the present invention has universality for the RFID air interface, so applied widely.Comprise all kinds electronic tag, comprise passively, active that half passive, asynchronous synchronously, combination, intelligent label and other type of electrical subtab, all kinds read write line comprises portable, and is fixed, vehicular, integral type and split type read write line.The different modes of saying earlier comprises that the read write line label of making peace earlier says earlier.
5) since relevant RFID traffic model proposed by the invention based on the far zone field notion, so the given parameter-definition of the present invention, method of testing is applicable to VHF (very high frequency(VHF)), UHF (ultrahigh frequency) and MW (microwave).
Description of drawings
Fig. 1 is the synoptic diagram of the traffic model of the wireless write operation of RFID of the present invention;
The ablation process that the figure shows RFID is to send write command by read write line, arrives the electronic tag end by wireless channel.After electronic tag is received instruction, finish write operation automatically.It is a communication process of realizing unidirectional control function.
Fig. 2 is the synoptic diagram of the traffic model of RFID read operation of the present invention.
This figure has provided the RFID read data functions and has realized.This is the communication process of a bidirectional data transfers.Be the forward communication of read write line inquiry electronic tag and two subprocess of reverse link communication that electronic tag is replied read write line.Electronic tag has the reception modulated signal, demodulation, and recognition instruction extracts data, the complete transceiver func-tions of modulation and transmission modulation signal.The realization of once reading, what finish is the overall process of two-way communication.
Fig. 3 is a RFID air interface parameters test macro block diagram of the present invention.
Comprise tested label in the system, auxiliary electron label, test read write line and be used for the spectrum analyzer (or be called for short frequency spectrograph) of measured signal level.
Embodiment
1. traffic model key concept
The RFID air interface that is applicable to the far zone field environment has two kinds of working methods, wireless writing mode and read mode.Therefore, exist two kinds of traffic models.RFID is wireless to write model (as Fig. 1), and RFID reads model (as Fig. 2).
In traffic model, no matter be write operation, or read operation, not that electronic tag is considered as pure backscatterer, so do not re-use the notion of RCS.For write operation, think that electronic tag is a terminal node on the communication link.It is a transceiver equipment completely.Therefore, it should have receiving sensitivity, emissive power.For read operation, we are considered as a repeated link inquiring and replying overall process, then electronic tag can be regarded as a forwarding node again, and the emissive power of label should be regarded as a link-label rf gain of system transmissions gain (or loss) to the ratio of receiving sensitivity.This value may be for just under the active label situation, may be for negative or be approximately zero dB under the passive label situation.
According to the Communication System Design notion, it has been generally acknowledged that forward link and reverse link should be symmetric channel, loss should equate, therefore, in the system design, should guarantee that forward and reverse link system equipment ability equates.So the systematic parameter based on traffic model should comprise that forward and reverse junction device ability symmetry detects.
2. parameter-definition
The present invention has provided the parameter-definition based on radio frequency discrimination RFID traffic model air interface:
1) read write line receiving sensitivity: the minimum received power level that can correctly discern electronic tag return data information when read write line is realized read operation.
2) electronic tag write signal receiving sensitivity: label correct execution read write line writes the minimum received power level that write operation is finished in instruction.
3) electronic tag reads signal receiving sensitivity: label correct execution read write line reading command is finished the minimum received power level of read operation.
4) reflective power of label receiving sensitivity working point: read under the minimum received signal power level of the signal situation emissive power of label what read write line was sent.
5) label rf gain: promptly the label emissive power is to the ratio of its received power level.
6) forward path capacity of equipment: by read write line available gain of all devices to the label signal transfer path summation of (comprising loss) as negative gain.
7) reverse path capacity of equipment: by label available gain of all devices to the read write line signal transmission path summation of (comprising loss) as negative gain.
8) forward and reverse junction device ability symmetry: by read write line to label with by the ratio of label to the total capacity of equipment of read write line two paths.
The unit of the above power level is dBm, and the above gain (comprising the loss as negative gain) is all by dB.As use other unit, should do corresponding conversion in the calculating.The above emissive power (EIRP) and receiving sensitivity all comprise its used antenna gain, as using the definition of transmitter power (ERP) and receiver sensitivity, then do not comprise its used antenna gain.
3. test macro signal flow
The present invention proposes RFID traffic model air interface parameters method of testing, its basic ideas are to introduce special-purpose auxiliary electron label, by the loss test to channel, and after getting in touch tested label connecting system, system's relevant parameter is determined defined every air interface parameters value.
RFID traffic model air interface parameters test macro basic functional principle frame such as Fig. 3.The air interface basic parameter is pressed signal flow and is arranged as follows:
P
IT(P
ITMIN)→L
S→P
SR(P
TR)→H
S(H
T)→P
ST(P
TT)→L
S→P
IR(P
IRMIN)
P
IT: the read write line emissive power
P
ST: the assisted tag emissive power
P
IR: the read write line received power level
P
SR: the assisted tag received power level
P
IRMIN: the read write line receiving sensitivity
P
STMIN: the assisted tag emissive power of corresponding read write line receiving sensitivity working point
P
TT: tested label emissive power
P
TR: the received power level of tested label
P
TRMIN: tested label receiving sensitivity
P '
TT: tested label is in receiving sensitivity working point emissive power
L
S: air interface one way path loss
H
S: the assisted tag rf gain.
H
S=assisted tag emissive power P
STMIN-assisted tag received power level P
TRMIN
H
T: tested label rf gain
H
T=tested label emissive power P
ST-tested label receiving sensitivity P
TRMIN
G
A: forward (or claiming descending) radio equipment ability
The gain that read write line all devices to the tag path provides (if loss, by negative gain) sum.Represent the maximum transmitted ability of forward channel.
G
B: reverse (or deserving to be called row) radio equipment ability
The gain that label all devices to the read write line path provides (if loss, by negative gain) sum.Represent the maximum transmitted ability of backward channel.
Δ G: forward and reverse radio equipment ability symmetry
Forward channel capacity of equipment G
AWith backward channel capacity of equipment G
BPoor,
ΔG＝G
A-G
B。
4. test macro pacing items
1) precondition
The read write line receiver sensitivity is far above the receiving sensitivity of electronic tag;
Read write line is equal to or greater than 10 times of wavelength to the distance of label, or by the specified index of system design;
Test macro is under no multipath and the no fade condition;
Emissive power during incoming level detects, should take in by actual conditions in numerical value is handled the antenna gain and the feeder loss factor.
All antenna polarizations are in full accord.
2) test macro is to the requirement of assisted tag
Has the self-powered ability, to guarantee that assisted tag may provide the emissive power bigger than tested label, higher receiving sensitivity.
The assisted tag antenna is external, can test the transmitting-receiving level at antenna feed point;
Assisted tag is identical with the modulation parameter of tested label;
Assisted tag is used standard symmetrical dipole antenna or other antenna.Should count antenna gain by situation.
3) test macro is to the requirement of read write line
Test read write line output power is adjustable, or it is adjustable to add attenuator realization output power between read write line transceiver and its antenna.
Can survey at the feeding point place of transceiver and antenna and to send and received power level, or detection power level externally.
5. detection method for example
1) label write signal receiving sensitivity:
With progressively reducing or progressively increasing the read write line emissive power, repeat to write and read process, can correctly distinguish the minimum emissive power P of the data that write until searching out read write line
IT
Read write line is with power P
ITEmission is by the testing tool tags detected incoming level value P ' that is placed in the identical or suitable position of tested label
TRWMIN, be tested label write signal receiving sensitivity.
2) forward path propagation loss
Read write line transmission power value P
ITAnd the write signal receiving sensitivity P ' of tested electronic tag
TRWMIN, can calculate the forward path propagation loss.
3) read write line receiving sensitivity
Utilize auxiliary electron label adjustable transmission power ability, find the normal lowest power level value that receives of read write line.By the spectrum analyzer that inserts the reading and writing device antenna feeding point, read the read write line received power level value of this moment, i.e. the receiving sensitivity P of read write line
IRMIN
4) reverse path loss by one path
Emissive power by the assisted tag of detected read write line receiving sensitivity and read write line receiving sensitivity working point can calculate the reverse path propagation loss.
5) tested electronic tag reads signal receiving sensitivity
A. passive label
The reception of passive label directly is connected on the switching device of antenna port with emission, and the insertion loss of switching device is near 0dB.So can think the transmitted power level that signal receiving sensitivity just equals tested electronic tag that reads of tested electronic tag.
After the use assisted tag is finished the read write line sensitivity test, put in the assisted tag position or quite position of tested label, read write line sends and reads signal, because assisted tag sensitivity is usually above tested label, generalized case, read write line can not correctly be distinguished, and progressively increases read write line emissive power P this moment
TT, correctly distinguish the label return data up to read write line, if the read write line emissive power of this moment is P '
TTKeep same emissive power emission,, detect incoming level P in identical with tested electronic tag or suitable position
IRThe minimum received power level that is tested electronic tag is P '
IRMIN
B. active label
The reception of active label all is made of active device with emission.Receiving sensitivity height, emissive power are also big.And can detect, in fact active label can be equal to the assisted tag in this test macro.Therefore, test is the same with the detection of common radio transceiver simple.
Allow active label with bigger power emission, promptly guarantee under the condition of backward channel reliable transmission, detection is sent by read write line, and returns the signal that reads of read write line receiving end through tested label, finds read write line can correctly distinguish the read write line lowest transmit power of return data.The label incoming level of this moment is the signal receiving sensitivity that reads of tested electronic tag.
6) tested electronic tag reads signal receiving sensitivity working point emissive power
Passive label can think tested electronic tag to read the minimum received power level that signal receiving sensitivity working point emissive power equals label be P '
IRMIN
Active label should be a controllable parameter.Available General Instrument directly detects its ability to work scope.
7) label rf gain
Can calculate acquisition according to having recorded relevant data more than the definition utilization.
8) forward and reverse junction device ability symmetry
Can calculate acquisition according to having recorded relevant data more than the definition utilization.
Above-described embodiment of the present invention does not constitute the qualification to protection domain of the present invention.Any modification of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within the claim protection domain of the present invention.
Claims (10)
1. what the present invention proposed writes traffic model and reads that traffic model defines the method for air interface parameters and to the detection method of institute's defined parameters with RFID is wireless.
2. based on claim 1, the electronic tag write signal receiving sensitivity of setting up for electronic tag in rfid system defines and method of testing.
3. based on claim 1, introduce special-purpose auxiliary electron label,,, determine the method for RFID traffic model air interface parameters by calculating by to radio equipment and systematic parameter test.
4. based on claim 1, the electronic tag of setting up for electronic tag reads signal receiving sensitivity (and receiver sensitivity), emissive power, rf gain definition and method of testing.
5. based on claim 1, the read write line receiving sensitivity of setting up for radio-frequency (RF) identification (RFID) read write line (and receiver sensitivity) defines and method of testing.
6. based on claim 1, the present invention is applicable to passive label, half passive label, active label, sync tag, asynchronous label, combination tag and intelligent label etc.
7. based on claim 1, what the present invention provided is definition and the method for testing that rfid system engineering Application Design demand is introduced the forward and reverse junction device ability of RFID traffic model air interface symmetry.
The RFID traffic model air interface parameters definition that provides of the present invention and method of testing be applicable to portable, fixed, vehicular, integral type and type read write line such as split type.
9. based on claim 1, relevant RFID traffic model proposed by the invention, parameter-definition, method of testing are applicable to UHF (ultrahigh frequency) and MW (microwave), and the RFID air interface of all far zone field environment operations.
10. based on claim 1, relevant RFID traffic model proposed by the invention, parameter-definition, method of testing are applicable to the rfid system of read write line making peace earlier label saying earlier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810198912.9A CN101685492B (en) | 2008-09-28 | 2008-09-28 | RFID traffic model air interface parameter testing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810198912.9A CN101685492B (en) | 2008-09-28 | 2008-09-28 | RFID traffic model air interface parameter testing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101685492A true CN101685492A (en) | 2010-03-31 |
| CN101685492B CN101685492B (en) | 2016-05-11 |
Family
ID=42048648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810198912.9A Active CN101685492B (en) | 2008-09-28 | 2008-09-28 | RFID traffic model air interface parameter testing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101685492B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101794370A (en) * | 2010-04-09 | 2010-08-04 | 深圳市远望谷信息技术股份有限公司 | Method and device for remotely testing receiver sensitivity of radio frequency identification reader |
| CN101980254A (en) * | 2010-10-27 | 2011-02-23 | 北京邮电大学 | Method for testing sensitivity and read-write distance of ultra-high frequency radio frequency identification (UHF RFID) label by using giaga-hertz transverse electromagnetic (GTEM) cell |
| CN102880884A (en) * | 2011-07-14 | 2013-01-16 | 航天信息股份有限公司 | Testing system and testing method of passive tags |
| CN106295430A (en) * | 2016-07-22 | 2017-01-04 | 工业和信息化部电子工业标准化研究院 | Radio-frequency identification reader/writer receiving sensitivity measures system, method and test equipment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008114175A2 (en) * | 2007-03-22 | 2008-09-25 | Nxp B.V. | Rfid device, rfid system and equalization process in rfid systems |
| CN100559393C (en) * | 2008-03-25 | 2009-11-11 | 华南理工大学 | RFID label and reader thereof, reading system and safety certifying method |
-
2008
- 2008-09-28 CN CN200810198912.9A patent/CN101685492B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101794370A (en) * | 2010-04-09 | 2010-08-04 | 深圳市远望谷信息技术股份有限公司 | Method and device for remotely testing receiver sensitivity of radio frequency identification reader |
| CN101794370B (en) * | 2010-04-09 | 2012-01-11 | 深圳市远望谷信息技术股份有限公司 | Method and device for remotely testing receiver sensitivity of radio frequency identification reader |
| CN101980254A (en) * | 2010-10-27 | 2011-02-23 | 北京邮电大学 | Method for testing sensitivity and read-write distance of ultra-high frequency radio frequency identification (UHF RFID) label by using giaga-hertz transverse electromagnetic (GTEM) cell |
| CN102880884A (en) * | 2011-07-14 | 2013-01-16 | 航天信息股份有限公司 | Testing system and testing method of passive tags |
| CN102880884B (en) * | 2011-07-14 | 2015-12-09 | 航天信息股份有限公司 | A kind of test macro of passive label and method of testing |
| CN106295430A (en) * | 2016-07-22 | 2017-01-04 | 工业和信息化部电子工业标准化研究院 | Radio-frequency identification reader/writer receiving sensitivity measures system, method and test equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101685492B (en) | 2016-05-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102221663B (en) | Passive radio frequency tag reversed modulating performance testing method and apparatus thereof | |
| CN101112008B (en) | Radio frequency recognizing communication control method and radio frequency recognition system using the same | |
| CN103020562B (en) | Ultrahigh frequency radio frequency identification device (RFID) self-adaptive antenna impedance matching method | |
| CN101706863B (en) | Method and device for testing receiving sensitivity of RFID reader and reader thereof | |
| CN102565582B (en) | Test device of radio frequency identification equipment | |
| CN101706862B (en) | Method and device for testing receiving sensitivity of RFID reader | |
| CN103297157A (en) | Antenna detecting method for multi-antenna ultrahigh-frequency radiofrequencyidentification reader-writer | |
| CN103053118B (en) | Hybrid architecture for radio frequency identification and packet radio communication | |
| CN101499118A (en) | Method and apparatus for providing energy to passive label in radio frequency recognition system | |
| Jung et al. | A novel carrier leakage suppression front-end for UHF RFID reader | |
| EP1845630B1 (en) | Rfid carrier sense method and rfid system using the same | |
| CN101329399A (en) | System and method for implementing reliable short-range communication by detector array | |
| CN110751000A (en) | Verification test method and device for ultrahigh frequency RFID (radio frequency identification) tag | |
| CN101685492A (en) | RFID communication model air interface parameter testing method | |
| CN104299028A (en) | Ultrahigh-frequency radio frequency identification tag chip | |
| CN101299644B (en) | Antenna channel detection method based on six-port circuit | |
| CN102054152A (en) | Radio frequency identification (RFID) tag as well as radio-frequency gain control method and device thereof | |
| CN104036305B (en) | RFID reader-writer and method for carrying out self-detection and self-adjustment on transmitting power | |
| CN106339731A (en) | Automatically adjustable radio frequency carrier cancellation RFID reader-writer | |
| US20110241840A1 (en) | Method and device for improving communication distance accuracy of a transaction system via temperature compensation | |
| CN210347850U (en) | Ultrahigh frequency passive chip performance test system and loss measurement device thereof | |
| CN110197088B (en) | Device and method for improving receiving sensitivity of RFID multi-path reader-writer | |
| CN206224527U (en) | Can adjust automatically radio-frequency carrier offset rfid interrogator | |
| CN105929387B (en) | Self application distance measuring method is identified based on RFID power emission shelves in tunnel | |
| US20210158120A1 (en) | Method of monitoring and controlling a level of power transmitted by an antenna of a contactless communication device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |