CN101517595A - Method and system for devices to communicate wirelessly using RFID air protocols - Google Patents
Method and system for devices to communicate wirelessly using RFID air protocols Download PDFInfo
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- CN101517595A CN101517595A CNA2007800359900A CN200780035990A CN101517595A CN 101517595 A CN101517595 A CN 101517595A CN A2007800359900 A CNA2007800359900 A CN A2007800359900A CN 200780035990 A CN200780035990 A CN 200780035990A CN 101517595 A CN101517595 A CN 101517595A
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Abstract
The invention provides a method and system for exchanging data between one or more RFID readers and one or more non-tag devices in an RFID system using RFID air interface protocol. An RFID system includes one or more non-tag devices in data communication with one or more RFID readers over an interrogation zone. Non-tag devices utilize RFID air interface protocol to transmit and receive wireless data signals to and from the RFID readers, obviating the need to implement a separate communication infrastructure. The RFID readers may forward the data to an RFID backscatter enabled host computer for processing the received signals. Non-tag devices acting as readpoints communicate with other non-tag devices to establish a parent/child readpoint hierarchy. One or more multiplexers may facilitate the data exchange between RFID readers and the non-tag devices in order to provide an even more robust communication network.
Description
Technical field
The present invention relates to radio-frequency (RF) identification (" RFID ") communication, and relate to a kind of RFID network that uses the device of a kind of air interface protocol support except the RFID label particularly.
Background technology
Rfid system is used for a lot of different application (comprising for example in retail environment) and obtains the relevant information of object of having made label of the RFID recognizer.For example, can with RFID label attaching or be incorporated into product or the packing of product in.Utilize RFID interrogator (also being referred to as " RFID reader ") (this interrogator can be a device that fix, portable or hand-held) at this, the RFID label that is arranged in the interrogation zone of interrogator can be activated and provide (for example, product descriptor, sequence number, position, or the like) for information about of the object that is associated with this RFID label.These RFID labels receive and in response to radio frequency (" RF ") signal so that for example attached with this RFID label relevant information of product to be provided.This is that the air interface protocol (for example electronic product code (" EPC ") radio-frequency (RF) identification agreement) that typically utilizes a kind of standard is realized.This category information can comprise with shelf on object or the relevant inventory information of the object in the warehouse.Usually, the modulator in these RFID labels can utilize transmitter to send back a signal or a signal returned and penetrate back the RFID reader.This emission/reflection signal be called as backscatter signal.In addition, utilize the RFID scrambler information can be sent to these RFID labels (for example coded message).Therefore, rfid system typically be used to monitor the product stock list in the retail environment and utilize the RFID label or transponder with storage and the data of telereference the identification of product is provided.
In addition, some RFID uses and uses a reader to come to be connected to a plurality of antennas by multiplexer (" MUX ").For example using rfid system to follow the tracks of in the retail environment of stock list, knownly providing many and read a little, each reads and comprises that a little a plurality of RF multiplexers of use and numerous cable read a little to be connected to each.In this case, this MUX carries out the routing of RFID signal (for example RF signal) to a plurality of antennas based on a plurality of Digital Logic inputs from a controller.This MUX and the these antenna that is connected to this MUX typically are used to expand the scope of reader, comprise replying and/or the backscatter signal of data from these labels so that order and/or data can be sent to a plurality of labels and can receive.
An example is a kind of RFID network, and the object with attaching RFID label in this network places on the shelf with a plurality of antennas, and all these antennas are connected to a central reader.This network provides the long term inventory of object on the shelf.Yet, in this network with a plurality of antennas, a lot of electric wire and cables must be connected to that MUX goes up so that carry out routing for the necessary control signal of network function degree and RF signal and ac/dc (AC/DC) power.Equally, being connected to a plurality of MUX with a kind of nested arrangement can cause relation between these MUX and these antenna to become complicated rapidly with a plurality of MUX of the scope of extended RFID reader and be difficult to the situation of following the tracks of and understanding.People wish to have a kind of method and system, and this method and system easily allows the relation between these MUX is shone upon and obtained understanding.
The cost of these rfid systems and complicacy are very high usually.Further, for example, when heavy cable sub-argument folder etc. must be installed, time and complexity that these parts are installed were also very high.In this type systematic, use a plurality of RFID interrogators so that increased the cost of installation and maintenance system further at different position monitoring RFID labels.The result is that RFID user drops into substantial contribution is mainly used in inventory management with installation and maintenance RFID network system.
These identical users also have other communication requirements.For example, the user who has the rfid system that is used for inventory management may also have security personnel's monitoring system, perhaps has a kind of demand to this system at least.This typically require to install camera, light-infrared detector, sensor, or the like, they must carry out line so that communicate by wireless communication system and monitoring station or alarm boards.This communication infrastructure separates with the foundation structure that is used for rfid system.People wish to have a kind of method and system, and this method and system allows to share the communication purposes of RFID foundation structure for use in no RFID label.
Summary of the invention
The present invention has advantageously provided a kind of method and system of communicating by letter between one or more RFID readers and the one or more no label apparatus in a kind of RFID network that uses the RFID interface protocol.Method and system disclosed here uses the frequency spectrum and the RFID communication protocol of radio frequency, to allow the data communication between a RFID reader and one or more no RFID label apparatus.The object of no label (for example as multiplexer, camera, shelf reader, alarm device or computing machine) shows as the RFID label to this RFID reader, although the data that exchanged are not the data relevant with label.Therefore, can network service take place and need not extra installation process and/or recurrent cost between a plurality of RFID readers and no label object.
A kind of method of using rfid system support and no label apparatus data communication is provided in one embodiment.This method comprises uses a kind of RFID air interface protocol and one or more no label apparatus to communicate.
A kind of rfid system is provided in another embodiment.This system comprises the one or more RFID readers that carry out data communication with one or more no label apparatus, and wherein each RFID reader has a communication range.These one or more RFID readers are communicated by letter by the no label apparatus of RFID air interface protocol and these.
In another embodiment, the invention provides a kind of RFID multiplexer.This RFID multiplexer comprises a processing unit of the operation of controlling this multiplexer.Thereby this processing unit operation obtains data to inquire one or more no label apparatus.The data that cell stores is relevant with these no label apparatus.
Description of drawings
Consider that in conjunction with the drawings the also following detailed description of reference will be easier to understand the more complete understanding to the present invention and subsidiary advantage and characteristics, identical in the accompanying drawings reference marker refers to similar element, and in the accompanying drawings:
Fig. 1 is the block diagram of a constructed system of principle according to the present invention;
Fig. 2 is the block diagram of a constructed RFID multiplexer of principle according to the present invention;
Fig. 3 is the block diagram of an alternate embodiment of the present invention; And
Fig. 4 is a block diagram of showing that a kind of level that reads point apparatus according to the present invention is arranged.
Embodiment
With reference now to accompanying drawing,, wherein similarly Reference numeral refers to similar elements, figure 1 illustrates according to an example system of principles of construction of the present invention and generally it is designated as " 10 ".System 10 comprises one or more readers 12 of communicating by letter with a principal computer 14.Reader 12 carries out exchanges data with computing machine 14 as required, for example carries out stock list control.In this case, principal computer 14 comprises the database that is used to follow the tracks of and safeguard this stock list.As described below, principal computer 14 also comprise in the tracker 10 other the device between communication and those parts of hierarchical relationship, as storer, CPU, I/O, display etc., other devices in the system for example are a plurality of MUX, label, no label apparatus and similarly install.How interconnective this just allows operating personnel to understand these parts is and allows to use a plurality of system units with selectivity, for example upgrade the price on the shelf reader visual displays that is associated with the object of particular category, even when a particular sensor is triggered, receive view data from a specific camera.
Notice that although Fig. 1 illustrates all devices and reader 12 all is in direct or indirect radio communication, the present invention is not limited to this.It is contemplated that in a kind of wired mode one or more devices (for example MUX 16) are connected on the reader 12.
The present invention advantageously allows wirelessly to send different data by expanding existing RFID air interface protocol (for example electronic product code (" EPC ") radio-frequency (RF) identification agreement).Method and system of the present invention uses and is emitted to RFID interrogator 12 (note, can use term " reader " and " interrogator " interchangeably at this) or from the wireless frequency spectrum of its emission and the agreement media as network service.These communicators use the standard agreement emission, receive and coding RFID bag, but the data in these bags might not only be data and the orders relevant with control with tag recognition.In other words, these MUX 16 and no label apparatus 20 pairs of RFID readers, transmitter and receivers show as label 18, although data relevant with MUX 16 and no label apparatus 20 and/or to order be not the data of being correlated with label.This has just expanded conventional tag recognition/write/read to allow carrying out more firm communicating by letter with the no label apparatus 20 of these RFID multiplexers 16 and other.This also advantageously eliminates or has reduced and is used for that RFID reads a little and the cost that interconnects common desired wiring and installation of other devices (moving detector, EAS system, camera, door alarm device, intrusion alarm unit).
According to the present invention, a plurality of no label apparatus 20 can be any devices of requirement connected network communication.For example, a plurality of no label apparatus 20 can include but not limited to camera, shelf reader, computing machine, PIR, alarm, vision or audio alert device and system, controller, or the like.More specifically, no label apparatus 20c can be a camera of catching view data, and does not have label apparatus 20b and need to receive, handle and show this view data and/or control a computing machine of this camera operation.Originally be equipped with the ability of supporting RFID communication (being back scattering) if there is label apparatus 20, so can be with a separative element (be shown in Fig. 3 and will in following discussion) as the interface between the antenna 22 of this no label apparatus 20 and support RFID backscatter communications described herein in this consideration.For example, this separative element can use USB or other serials or parallel communicating to connect so that be connected with no label apparatus 20 interfaces.So this separative element can be created with these data blocks of store/buffer and in response to the RFID interrogating signal.
According to another aspect, a MUX 16 who is used for a plurality of labels 18 are carried out stock taking in its interrogation zone may need to store and send back principal computer 14 by 12 pairs of these inventory information of reader.In such circumstances, MUX 16 comprises that needs are used as an element that reads point (the no label apparatus 20 that should note other can comprise that also reader components is to read a little as RFID) so that the information of storing and transmitting label or not having label apparatus.
For example, MUX 16c can be used in its interrogation zone, detecting and reading from the label data of a plurality of labels 18 with no label apparatus 20 (for example label 18d and no label apparatus 20e).Data corresponding to label 18d are stored among the MUX 16c.Conversely, MUX16c shows as a label to MUX 16a.When its zone of MUX 16a inquiry when discerning a plurality of label 18, MUX 16c shows as label, and the inventory list of its label in its interrogation zone of storing and other devices can be used as that one or more data blocks send to MUX 16a and by its storage.Finally, when each device in its interrogation zone of main reader 12 inquiries, MUX 16a shows as a label.When further inquiry, main reader 12 is not only learnt MUX 16a and any label in its interrogation zone and is not had label apparatus, but also learns MUX 16c and any label (for example label 18d) in its interrogation zone and do not have label apparatus (for example not having label apparatus 20e).Like this, reader 12 can provide data for principal computer 14, these data can be used to make up the logical relation between these MUX 16, so that understand this network and be how to arrange and understand what device (for example, camera, alarm unit, shelf reader, or the like) and can communicate by letter with each MUX 16.
Fig. 2 is the block diagram of an exemplary MUX 16 of constructed according to principles of the present invention, and it can be used for supporting function described here.MUX 16 comprises the microcontroller 24 of the operation that is used to control MUX 16.Storage unit 26, RF detecting device 28, radio frequency modulator 30 and switching device 32 and microcontroller 24 electric connections.The sampling thief that may need and coupling device 34 and one or more detecting device 28 electric connections.When operation, MUX operation code and data storage are in storer 26, and this storer can comprise volatibility and/or nonvolatile storage.Modulator 30 is used for via switching device 32 baseband signal being modulated to a RF carrier wave that is used to transmit.The 34 common operations of a plurality of detecting devices 28 and sampler/coupling device are so that detect and extract baseband signal and order and data block from the RF signal (signal that for example meets the EPC air-interface standard) of a reception.Microcontroller 24 control switching element 32 are to switch to this input on one of outlet line.Note,, considered that at this switching device 32 can be controlled by a not too intelligentized logical circuit although Fig. 2 shows the MUX 16 of a microprocessor controls.
Refer again to Fig. 1,, and do not require that all communications between multiple arrangement (for example not having label apparatus 20) are all undertaken by a MUX 16 although Fig. 1 comprises a plurality of MUX 16.Considered that at this reader 12 can play the communications bridge beam action between the multiple arrangement (for example not having label apparatus 20a and no label apparatus 20b).
Referring to Fig. 3, there is shown an alternate embodiment of the present invention.Be not equipped with the ability of supporting RFID communication (being back scattering) if there is label apparatus 20, then one is separated the interface that RFID communication module 36 is provided between no label apparatus 20 and the antenna 22, so that support the RFID backscatter communications.RFID communication module 36 can communicate to connect by a USB or other serial or parallels no label apparatus 20 is connected with reader 12.RFID communication module 36 has foundation, storage and/or buffering from the data block of no label apparatus 20 receptions and in response to the ability of RFID interrogating signal.
As one first non-limiting example, system and method for the present invention can be assisted the transmission of view data from camera to a principal computer.This is useful in a camera (as no label apparatus 20) and situation that a security system is used in combination, and this security system is disposed in the environment of same support rfid system, as warehouse, retail shop etc.In this case, two backscatter devices (camera and receive the principal computer of view data) can be shared view data by a RFID interrogator (reader 12 or via one or more MUX 16) is used as an access point.For example, one has started video data block of backward scattered camera encapsulation.Then, RFID reader 12 utilizes this RFID air interface protocol to read this data block.In other words, this camera only shows as another label to the RFID reader, and this RFID reader is to read the backscatter signal with data from camera like this.
Then, this RFID reader will write one from the data block that video camera receives and start on the backward scattered principal computer of RFID, and this principal computer can be taked further action to video data, for example show or memory image.Therefore, in this case, RFID reader 12 (perhaps MUX 16) plays the effect of a Network Access Point that is used for this video camera and principal computer.
Another exemplary implementation of the present invention is relevant with a shelf reader system.In this implementation, the wireless system of a plurality of independent shelf reader of acting (for example battery powered shelf reader) can be formed network, inventory data and other data, for example state and event data are collected and transmitted to these readers.In addition, this commodity shelf system can comprise and utilize this RFID air interface protocol that data are offered the ability of multiple arrangement, to upgrade and to show price data.
In the present embodiment, view data can be read point (promptly from video camera) from one and be sent to mainframe computer system as described above.In addition, event data can be sent to mainframe computer system, mobile alarm event data for example, this data be collected from and come from and in each shelf reads point (having started the communicator of RFID) scope, started backward scattered (having started the RFID air interface protocol) device or read a little ownly.Single shelf read a little and can collect, store their inventory data and send it to a central host by this RFID network.This allows reading a little of distant place by the RFID over-the-air protocol data to be sent on the central host.This main frame can download to these shelf with price, sales promotion information, ad content etc. and read a little, is used to be shown to the client who is positioned on the shelf location that adopts the RFID air interface protocol.
Considered also that at this this client can be in the inquiry or the search of the enterprising shop stock list of doing business of a calculation element (for example, terminal, personal computer, hand-held computing device, or the like).This information can be sent to a principal computer, this principal computer and then information downloaded on the shelf that adopt this RFID air interface protocol read a little.This information can comprise some instructions, so that these shelf read and a little open visual, that can hear or other indicators and allow client's desired object of discovery fast on shop shelf.
The invention provides a kind of method with serial form (for example XML) encapsulation of data item.The present invention also provides and a plurality of RFID in the certain limit has been read a little and a kind of method that backscatter devices (for example a master reads a little and the subordinate backscatter devices) is associated.According to an aspect of the present invention, a plurality of reading a little arranged with the master/slave level tab sequencial that reads a little.Another aspect of the present invention provide use a master to read a little to read from a plurality of subordinates collect data, store these data, then network to a kind of method of more senior these data of transmission.
The present invention also provides and has been used for mainframe computer system data block is write reading a little and a kind of method of backscatter devices in the network.Fig. 4 provides the diagram of one embodiment of the invention, and a plurality of no label apparatus 20 and MUX 16 are arranged in a kind of principal and subordinate's level form.The invention provides and be used to a kind of method of finding to be positioned at all back scattering of a desirable physical location and reading point apparatus, even outside the scope that much is positioned at the RFID reader that is attached on the principal computer in these devices.For example, in Fig. 4, a plurality of no label apparatus 20 are communicated by letter with other no label apparatus 20 and/or MUX 16.Each communicates to connect represents a master-slave relationship, make thus a device (no label apparatus 20 or MUX 16) can with communicate by letter " chain " in more another device of eminence communicate.This hierarchical relationship makes some no label apparatus 20 (being usually located at the outside of the interrogation zone of a RFID reader 12) receive RFID inquiry instruction from a RFID reader.The present invention also provides a kind of method that is used for distributing and being provided with by principal computer 14 master slave relation for example shown in Figure 4 in network 10.
It will be appreciated by those of skill in the art that, the invention is not restricted to the content that above institute specifically illustrates and describes.In addition, unless opposite description is arranged, should notice that all accompanying drawings do not draw in proportion.Under the prerequisite that does not depart from scope and spirit of the present invention, can carry out various modifications and variations according to above-mentioned teachings, scope and spirit of the present invention only are subjected to the restriction of following claims.
Claims (25)
1. communication means, this method comprises:
Use a kind of RFID air interface protocol and one or more no label apparatus to communicate.
2. the method for claim 1 comprises that further data are sent to one from these one or more no label apparatus has started the backward scattered principal computer of RFID.
3. the method for claim 1, this method further provides the one or more RFID readers with these one or more no label apparatus data communication, these one or more RFID readers have a corresponding interrogation zone separately, and wherein these one or more no label apparatus show as the RFID label to these one or more RFID readers.
4. method as claimed in claim 3 further comprises providing one or more multiplexers to assist the data communication between these one or more RFID readers and this one or more no label apparatus.
5. method as claimed in claim 4, wherein these one or more multiplexers comprise a plurality of data interrogation elements that are used to read from the data of these one or more no label apparatus receptions.
6. method as claimed in claim 3 further comprises providing a RFID communication module to communicate by letter with the RFID air interface protocol between these one or more RFID readers to aid in these no label apparatus.
7. method as claimed in claim 2, wherein at least one in these one or more no label apparatus is that a master reads point apparatus, and this method comprises that further utilizing this RFID air interface protocol to start the backward scattered principal computer of RFID from this reads point apparatus with information transmission to this master.
8. method as claimed in claim 7 further comprises providing a subordinate to read point apparatus, and this master reads point apparatus and reads point apparatus from this subordinate and collect data and be used for further data transmission to create a kind of master/slave level arrangement of reading point apparatus.
9. method as claimed in claim 8 is wherein arranged according to this level, and this principal computer writes these with data and reads point apparatus.
10. method as claimed in claim 8, wherein at least one to read point apparatus be the outside that is positioned at the interrogation zone of these one or more RFID readers.
11. method as claimed in claim 2, wherein at least one no label apparatus is a camera.
12. method as claimed in claim 11 further comprises:
Catch piece image;
This image is stored as a data block, and
Utilize this air interface protocol to detect backscatter signal, these backscatter signal comprise this data block.
13. method as claimed in claim 12 comprises that further this data block is write this has started the backward scattered principal computer of RFID.
14. a rfid system comprises:
With one or more RFID readers of one or more no label apparatus data communication, each RFID reader has an interrogation zone, and wherein these one or more RFID readers communicate via a RFID air interface protocol and these no label apparatus.
15. system as claimed in claim 14 comprises that further of communicating by letter with these one or more RFID reader data has started the backward scattered principal computer of RFID.
16. system as claimed in claim 14 comprises that further one or more multiplexers are to aid in the data communication between these one or more RFID readers and this one or more no label apparatus.
17. system as claimed in claim 16, wherein these one or more multiplexers comprise a plurality of data interrogation elements that are used to read from the data of these one or more no label apparatus receptions.
18. system as claimed in claim 14 comprises that further a RFID communication module communicates by letter with the RFID air interface protocol between these one or more RFID readers to aid in these no label apparatus.
19. system as claimed in claim 15, wherein at least one in these one or more no label apparatus is that a master reads point apparatus, and this master reads point apparatus and can utilize this RFID air interface protocol to receive information from this principal computer.
20. system as claimed in claim 19, comprise that further one or more subordinates read point apparatus, this master reads point apparatus and collects data and create a kind of master/slave level arrangement of reading point apparatus and be used for further data transmission from these one or more point apparatus that read.
21. system as claimed in claim 20 wherein arranges according to this level, this principal computer writes in this rfid system these with data and reads point apparatus.
22. system as claimed in claim 20, wherein at least one to read point apparatus be the outside that is positioned at the interrogation zone of these one or more RFID readers.
23. system as claimed in claim 15, wherein at least one no label apparatus is a camera.
24. system as claimed in claim 23, wherein this camera is caught piece image and this image is stored as a data block, and wherein this RFID reader utilizes this air interface protocol to detect backscatter signal from this camera data block, and these backscatter signal comprise this data block.
25. a RFID multiplexer comprises:
Control a processing unit of this multiplexer operation, the operation of this processing unit inquires that one or more no label apparatus are to obtain data; And
Be used to store a storage unit of the data relevant with these no label apparatus.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US84812706P | 2006-09-29 | 2006-09-29 | |
| US60/848,127 | 2006-09-29 | ||
| US11/801,232 | 2007-05-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101517595A true CN101517595A (en) | 2009-08-26 |
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ID=40225179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007800359900A Pending CN101517595A (en) | 2006-09-29 | 2007-10-01 | Method and system for devices to communicate wirelessly using RFID air protocols |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101517595A (en) |
| AR (1) | AR063085A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102025763A (en) * | 2009-09-23 | 2011-04-20 | 广州盛华信息技术有限公司 | System for realizing shared internet surfing |
| CN103843040A (en) * | 2011-06-28 | 2014-06-04 | 泰坦公司 | Computing systems and methods for electronically indicating the acceptability of a product |
| CN114174771A (en) * | 2019-06-05 | 2022-03-11 | 唐纳森公司 | Multi-region filter monitoring system and method |
| US12136299B2 (en) | 2018-09-18 | 2024-11-05 | Donaldson Company, Inc. | Filtration systems with multitiered data exchange capabilities |
| US12357936B2 (en) | 2017-08-16 | 2025-07-15 | Donaldson Company, Inc. | Filter systems, elements and methods with short-range wireless tracking features |
-
2007
- 2007-10-01 CN CNA2007800359900A patent/CN101517595A/en active Pending
- 2007-10-01 AR ARP070104346A patent/AR063085A1/en unknown
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102025763A (en) * | 2009-09-23 | 2011-04-20 | 广州盛华信息技术有限公司 | System for realizing shared internet surfing |
| CN103843040A (en) * | 2011-06-28 | 2014-06-04 | 泰坦公司 | Computing systems and methods for electronically indicating the acceptability of a product |
| CN103843040B (en) * | 2011-06-28 | 2017-05-03 | 泰坦公司 | Computing systems and methods for electronically indicating the acceptability of a product |
| US12357936B2 (en) | 2017-08-16 | 2025-07-15 | Donaldson Company, Inc. | Filter systems, elements and methods with short-range wireless tracking features |
| US12136299B2 (en) | 2018-09-18 | 2024-11-05 | Donaldson Company, Inc. | Filtration systems with multitiered data exchange capabilities |
| CN114174771A (en) * | 2019-06-05 | 2022-03-11 | 唐纳森公司 | Multi-region filter monitoring system and method |
| US12039854B2 (en) | 2019-06-05 | 2024-07-16 | Donaldson Company, Inc. | Multi-zone filtration monitoring systems and methods |
Also Published As
| Publication number | Publication date |
|---|---|
| AR063085A1 (en) | 2008-12-23 |
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