CN106909950A - A kind of RFID communication method and system - Google Patents
A kind of RFID communication method and system Download PDFInfo
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- CN106909950A CN106909950A CN201610205753.5A CN201610205753A CN106909950A CN 106909950 A CN106909950 A CN 106909950A CN 201610205753 A CN201610205753 A CN 201610205753A CN 106909950 A CN106909950 A CN 106909950A
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- 238000004891 communication Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000000052 comparative effect Effects 0.000 claims abstract description 20
- 238000005259 measurement Methods 0.000 claims abstract description 20
- 230000008569 process Effects 0.000 claims abstract description 10
- 230000000737 periodic effect Effects 0.000 claims description 8
- 230000000284 resting effect Effects 0.000 claims description 7
- 230000007246 mechanism Effects 0.000 description 4
- 230000003993 interaction Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005059 dormancy Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
- G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisions for transferring data to distant stations, e.g. from a sensing device
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Abstract
The invention discloses a kind of RFID communication method and system, method includes：Read write line sends wake command to label, and the signal intensity that reception is carried in the wake command indicates RSSI thresholdings；The label receives the wake command, measurement receives the RSSI of wake command, and the RSSI carried in RSSI obtained by measuring and the wake command is compared, judged whether to meet default RSSI threshold conditions according to comparative result, and when judging to meet default RSSI threshold conditions, into the label and the order exchange process of read write line.
Description
Technical field
The present invention relates to radio frequency identification (RFID, Radio Frequency Identification) technical field, more particularly to
A kind of RFID communication method and system.
Background technology
RFID is that communication is set up between read write line and electronic tag using radiotechnics, reaches the purpose of information inquiry, is mesh
One of key technology of preceding Internet of Things, is with a wide range of applications.Rfid system is generally made up of label and read write line, label
For recording Item Information, read write line is used to distinguish label.
, it is necessary to limit the communication distance of read write line and label in practical application, and how to limit the communication distance of read write line and label
It is then the technical problem to be solved in the present invention.
The content of the invention
To solve existing technical problem, the embodiment of the present invention is expected to provide a kind of RFID communication method and system.
For achieving the above object, the embodiment of the present invention is realized in the following ways：
A kind of radio frequency discrimination RFID communication means is the embodiment of the invention provides, methods described includes：
Read write line sends wake command to label, and the signal intensity that reception is carried in the wake command indicates RSSI thresholdings；
The label receives the wake command, and measurement receives the RSSI of wake command, and RSSI obtained by measuring with it is described
The RSSI carried in wake command is compared, and judges whether to meet default RSSI threshold conditions according to comparative result, and
When judgement meets default RSSI threshold conditions, into the label and the order exchange process of read write line.
It is described to be judged whether to meet default RSSI threshold conditions according to comparative result in such scheme, including：
When RSSI obtained by measurement is more than or equal to the RSSI thresholdings, judge that comparative result meets default RSSI threshold conditions；
Otherwise, it is determined that comparative result is unsatisfactory for default RSSI threshold conditions.
It is described to be judged whether to meet default RSSI threshold conditions according to comparative result in such scheme, including：
Certain operations are performed to measurement gained RSSI and the RSSI thresholdings respectively, and will measurement gained RSSI and RSSI thresholdings
The result for performing certain operations respectively is compared, and is judged whether to meet default RSSI threshold conditions according to comparative result.
In such scheme, for periodic awakening, the duration of the wake command intercepts state for time with mark more than or equal to label
Sign resting state time sum.
In such scheme, the RSSI thresholdings take up room more than or equal to 1 bit in the data frame structure of the wake command.
The embodiment of the present invention additionally provides a kind of radio frequency discrimination RFID communication system, and the system includes：Read write line and label,
The read write line is used for, and wake command is sent to label, and the signal intensity that reception is carried in the wake command indicates RSSI
Thresholding；
The label is used for, and receives the wake command, and measurement receives the RSSI of wake command, and will measurement gained RSSI
It is compared with the RSSI carried in the wake command, is judged whether to meet default RSSI threshold conditions according to comparative result,
And when judging to meet default RSSI threshold conditions, into the label and the order exchange process of read write line.
In such scheme, the label is further used for, and when RSSI obtained by measurement is more than or equal to the RSSI thresholdings, judges
Comparative result meets default RSSI threshold conditions；Otherwise, it is determined that comparative result is unsatisfactory for default RSSI threshold conditions.
In such scheme, the label is further used for, and performs specific fortune to measurement gained RSSI and the RSSI thresholdings respectively
Calculate, and gained RSSI and RSSI thresholdings will be measured perform the result of certain operations respectively and be compared, judged according to comparative result
Whether default RSSI threshold condition is met.
In such scheme, for periodic awakening, the duration of the wake command intercepts state for time with mark more than or equal to label
Sign resting state time sum.
In such scheme, the RSSI thresholdings take up room more than or equal to 1 bit in the data frame structure of the wake command.
A kind of RFID communication method and system that the embodiment of the present invention is provided, for the rfid system with wake-up mechanism in,
When rfid interrogator wakes up label, label is limited by the RSSI threshold values carried in wake command and only receives RSSI more than this
The wake command of RSSI threshold values, so as to reach the method for limiting communication distance.Using the embodiment of the present invention, because read write line is called out
Wake up and directly carry RSSI thresholdings in order, and label does not store RSSI thresholdings, so as to simplify limited by RSSI communicate away from
From method, and increased communication efficiency.
Brief description of the drawings
Fig. 1 is the RFID communication schematic diagram one of the embodiment of the present invention；
Fig. 2 is the RFID communication schematic diagram two of the embodiment of the present invention.
Specific embodiment
The technical solution of the present invention is further elaborated with specific embodiment below in conjunction with the accompanying drawings.
Wake-up mechanism is relatively more in the application of RFID fields, and read write line is needed when being communicated with label, it will usually first transmission one or
Several wake commands, working condition is switched to by label, makes the subsequent commands of its response read write line.
The main purpose of the embodiment of the present invention is to provide a kind of signal intensity by receiving to indicate (RSSI, Received Signal
Strength Indication) thresholding limit RFI D read write lines and label communication distance method, simplify distance and limit mechanism,
And improve its flexibility.Its general principle is：When read write line wakes up label, RSSI thresholdings ginseng is carried in the wake command for sending
Number, label is carried out the actual measurement RSSI of wake command with the RSSI thresholdings of carrying in wake command after wake command is received
Compare, the actual measurement RSSI value of only wake command meets RSSI threshold conditions, and label can just enter the subsequent commands with read write line
Interaction, the purpose of communication distance is limited so as to reach by RSSI thresholdings.
Label, can be directly to RSSI when the actual measurement RSSI of relatively wake command is with the RSSI thresholdings of carrying in wake command
Value compares size, it is also possible to RSSI is carried out specific computing (specific computing includes any computing or conversion to RSSI,
RSSI is for example multiplied by after a fixed number number for adding another fixation) after, then it is compared size.
Read write line wakes up label by carrying the wake command of RSSI thresholdings, and enters process such as Fig. 1 institutes that line command is exchanged with label
Show.
Below again by taking the rfid system of periodic wakeup as an example, the embodiment of the present invention is illustrated.
Periodic awakening refer to label periodically in state and resting state alternation procedure is intercepted, in state of intercepting, label can be intercepted
The wake command of read write line, in resting state, label will not receive any order in low power consumpting state.Guarantee to call out
Awake label, read write line needs persistently to send wake command, and the duration is more than or equal to " label intercepts state for time+label dormancy shape
The state time ".Label exits periodic " intercepting-dormancy " process after qualified wake command is received, into
Read write line command interaction process.
Reference picture 2, the specific embodiment of the invention includes three below step：
Step one, according to use RFID protocol and apply needs, it is determined that the data frame structure of the wake command with RSSI thresholdings；
A kind of typical wake command data frame structure with RSSI thresholdings is as shown in table 1：
| Lead code | Synchronous code | Data length | Frame option | Command code | RSSI thresholdings | Check code |
| X bytes | X bytes | X bytes | X bytes | X bytes | 1 byte | X bytes |
Table 1
RSSI thresholdings are related with practical service environment to the corresponding relation for limiting distance, it is necessary to through repeatedly survey in practical service environment
After examination, RSSI thresholdings are set up according to test result and the corresponding table of distance is limited.
Step 2, read write line persistently sends wake command, and as shown in table 1, order duration computing formula is as follows for command format：
Wake command duration >=label intercepts state for time+label resting state time
Step 3, after the state of intercepting receives read write line wake command frame, each field in frame structure differentiates that this frame is to label
It is no correct, if correct wake command, then obtain the RSSI value of this wake command signal, with the RSSI in wake command
Thresholding field value is compared, if it find that the RSSI value of wake command signal is bigger than RSSI threshold value, then exits the state of intercepting,
Into the order exchange process with read write line, the RSSI if not correct wake command, or wake command signal is unsatisfactory for
RSSI thresholdings, then abandon this frame, reenters periodic " intercepting-dormancy " process.
In sum, the embodiment of the present invention is used in the rfid system with wake-up mechanism, when rfid interrogator wakes up label, passes through
The RSSI threshold values limitation label carried in wake command only receives wake commands of the RSSI more than this RSSI threshold value, so as to reach
Method to communication distance is limited.Using the method, due to directly carrying RSSI thresholdings in read write line wake command, and label is not
Storage RSSI thresholdings, so as to simplify the method that communication distance is limited by RSSI, and increased communication efficiency.It is of the invention real
The wake command for applying example refers to all wireless signals for making label into command interaction state.
The above, specific embodiment only of the invention, but protection scope of the present invention is not limited thereto, and it is any to be familiar with sheet
Those skilled in the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all cover in this hair
Within bright protection domain.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of radio frequency discrimination RFID communication means, it is characterised in that methods described includes：
Read write line sends wake command to label, and the signal intensity that reception is carried in the wake command indicates RSSI thresholdings；
The label receives the wake command, and measurement receives the RSSI of wake command, and RSSI obtained by measuring with it is described
The RSSI carried in wake command is compared, and judges whether to meet default RSSI threshold conditions according to comparative result, and
When judgement meets default RSSI threshold conditions, into the label and the order exchange process of read write line.
2. RFID communication method according to claim 1, it is characterised in that described to be judged whether to meet according to comparative result
Default RSSI threshold conditions, including：
When RSSI obtained by measurement is more than or equal to the RSSI thresholdings, judge that comparative result meets default RSSI threshold conditions；
Otherwise, it is determined that comparative result is unsatisfactory for default RSSI threshold conditions.
3. RFID communication method according to claim 1, it is characterised in that described to be judged whether to meet according to comparative result
Default RSSI threshold conditions, including：
Certain operations are performed to measurement gained RSSI and the RSSI thresholdings respectively, and will measurement gained RSSI and RSSI thresholdings
The result for performing certain operations respectively is compared, and is judged whether to meet default RSSI threshold conditions according to comparative result.
4. the RFID communication method according to claim 1,2 or 3, it is characterised in that for periodic awakening, the wake-up
The duration of order intercepts state for time and label resting state time sum more than or equal to label.
5. the RFID communication method according to claim 1,2 or 3, it is characterised in that the RSSI thresholdings are called out described
Taken up room more than or equal to 1 bit in the data frame structure of awake order.
6. a kind of radio frequency discrimination RFID communication system, it is characterised in that the system includes：Read write line and label,
The read write line is used for, and wake command is sent to label, and the signal intensity that reception is carried in the wake command indicates RSSI
Thresholding；
The label is used for, and receives the wake command, and measurement receives the RSSI of wake command, and will RSSI obtained by measurement and
The RSSI carried in the wake command is compared, and is judged whether to meet default RSSI threshold conditions according to comparative result,
And when judging to meet default RSSI threshold conditions, into the label and the order exchange process of read write line.
7. RFID communication system according to claim 6, it is characterised in that the label is further used for, in measurement institute
When obtaining RSSI more than or equal to the RSSI thresholdings, judge that comparative result meets default RSSI threshold conditions；Otherwise, it is determined that than
Relatively result is unsatisfactory for default RSSI threshold conditions.
8. RFID communication system according to claim 6, it is characterised in that the label is further used for, respectively to surveying
Amount gained RSSI and the RSSI thresholdings perform certain operations, and measurement gained RSSI and RSSI thresholdings are performed respectively specific
The result of computing is compared, and is judged whether to meet default RSSI threshold conditions according to comparative result.
9. the RFID communication system according to claim 6,7 or 8, it is characterised in that for periodic awakening, the wake-up
The duration of order intercepts state for time and label resting state time sum more than or equal to label.
10. the RFID communication system according to claim 6,7 or 8, it is characterised in that the RSSI thresholdings are called out described
Taken up room more than or equal to 1 bit in the data frame structure of awake order.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2015110341666 | 2015-12-23 | ||
| CN201511034166 | 2015-12-23 |
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| CN106909950A true CN106909950A (en) | 2017-06-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108537080A (en) * | 2018-03-27 | 2018-09-14 | 顺丰科技有限公司 | A kind of logistics electronic label and its awakening method |
| CN114266263A (en) * | 2021-12-08 | 2022-04-01 | 北京合瑞华思科技有限公司 | Directional awakening method for wireless PTL electronic picking tag |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030104848A1 (en) * | 2001-11-30 | 2003-06-05 | Raj Brideglall | RFID device, system and method of operation including a hybrid backscatter-based RFID tag protocol compatible with RFID, bluetooth and/or IEEE 802.11x infrastructure |
| CN101236611A (en) * | 2007-02-02 | 2008-08-06 | 成都西谷曙光数字技术有限公司 | Intelligent electronic label system |
| WO2010035345A1 (en) * | 2008-09-29 | 2010-04-01 | 富士通株式会社 | Rfid tag, rfid system, signal intensity measuring method, and measurement program |
| CN104680100A (en) * | 2013-12-03 | 2015-06-03 | 北京中电华大电子设计有限责任公司 | Active RFID (Radio Frequency Identification Device) low power consumption period awakening method |
-
2016
- 2016-04-05 CN CN201610205753.5A patent/CN106909950A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030104848A1 (en) * | 2001-11-30 | 2003-06-05 | Raj Brideglall | RFID device, system and method of operation including a hybrid backscatter-based RFID tag protocol compatible with RFID, bluetooth and/or IEEE 802.11x infrastructure |
| CN101236611A (en) * | 2007-02-02 | 2008-08-06 | 成都西谷曙光数字技术有限公司 | Intelligent electronic label system |
| WO2010035345A1 (en) * | 2008-09-29 | 2010-04-01 | 富士通株式会社 | Rfid tag, rfid system, signal intensity measuring method, and measurement program |
| CN104680100A (en) * | 2013-12-03 | 2015-06-03 | 北京中电华大电子设计有限责任公司 | Active RFID (Radio Frequency Identification Device) low power consumption period awakening method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108537080A (en) * | 2018-03-27 | 2018-09-14 | 顺丰科技有限公司 | A kind of logistics electronic label and its awakening method |
| CN114266263A (en) * | 2021-12-08 | 2022-04-01 | 北京合瑞华思科技有限公司 | Directional awakening method for wireless PTL electronic picking tag |
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Effective date of registration: 20190905 Address after: 610015 China (Sichuan) Free Trade Pilot Zone, Chengdu City, Sichuan Province Applicant after: Sichuan Huada Hengxin Technology Co., Ltd. Address before: Room 305, Block Y1, 112 Liangxiu Road, Pudong New Area, Shanghai, 201203 Applicant before: HUADA SEMICONDUCTOR CO., LTD. |
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Application publication date: 20170630 |