CN103761548A - Active RFID tag information interaction method - Google Patents
Active RFID tag information interaction method Download PDFInfo
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- CN103761548A CN103761548A CN201310751137.6A CN201310751137A CN103761548A CN 103761548 A CN103761548 A CN 103761548A CN 201310751137 A CN201310751137 A CN 201310751137A CN 103761548 A CN103761548 A CN 103761548A
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Abstract
The invention discloses an active RFID tag information interaction method. The method mainly includes the steps that a fixed active RFID tag sends a broadcast frame periodically after initialization and waits for a reply; a movable active RFID tag analyzes whether the content of the broadcast frame has a communication requirement when receiving the broadcast frame, and if the answer is positive, the reply is sent; if the fixed active RFID tag receives a reply broadcast frame, a point to point (P2P) communication mode is entered; the movable active RFID tag receives a P2P data frame and replies the P2P data frame until communication between the movable active RFID tag and the fixed active RFID tag is finished. According to the method, the broadcast frame is used for building a communication relation and building a data transmission relation with the P2P data frame so that the requirement of a communication protocol can be effectively met and the method can be widely used in other communication protocols.
Description
Technical field
The invention belongs to wireless communication technology field, relate to a kind of active RFID tag information interacting method and system, be specifically a kind ofly applied to the active RFID tag information interacting method of wireless mobile environment and the design of system.
Background technology
RFID(radio-frequency (RF) identification) be a kind of wireless communication system, by two basic devices, formed, read write line (or reader) and a lot of transponder (or label), be aided with antenna, perimeter network, middleware, management system simultaneously, thereby form complete RFID application system.Active RFID, is called again active rfid (Active tag), and one type of the electronic tag of dividing according to the difference of electronic tag power supply mode, is equipped with battery in active RFID tag.
As long as RFID label is placed in, the electromagnetic field of fetch equipment formation is interior just can accurately be read, more be applicable to being used in conjunction with the treatment facility of various robotizations, reduce the cost of even getting rid of because of human resources, Efficiency Decreasing and generation mistake and error correction that manual intervention data acquisition brings simultaneously; RFID can carry out thousands of times reading p.s., can process many labels simultaneously, efficient and pin-point accuracy, thereby make enterprise neither reduce operating efficiency, do not increase again under the prerequisite of handling cost, increase substantially management fineness, allow whole operation process real-time transparent, create huge economic benefit.The recognition of RFID label, need to, with the visual prerequisite that is visible as, because it does not rely on visible ray, thereby not use under the rugged surroundings that can cannot adapt at those barcode technologies, as high dust pollution, field etc., can further expand like this range of application of automatic identification technology.
Read write line in label and its corresponding region in wireless network in a regional extent carries out mutual process and is generally: label enters the signal that returns to a certain frequency behind magnetic field, after read write line reading information decoding, deliver to CIS and carry out relevant data processing.In communication process, read write line can carry out information to label, and control accordingly, as transmit required information or enter sleep state etc., between the two, by communication protocol, undertaken alternately, agreement agreement comprises has made unified regulation to problems such as data layout, the method for synchronization, transfer rate, transfer step, EDC error detect correction mode and control character definition, and communicating pair must be observed jointly.
But existing agreement is not all carried out specific definition for the frame format of active mobile tag specially as ISO/IEC18000-4, ISO/IEC18000-7 etc., once make RFID label position that change occur, cannot carry out good communicating by letter with read write line, more cannot utilize well the active label in moving, greatly limit the usable range of active electronic label.This means that a lot of labels are after coming into operation, can only carry out information until running down of battery in original place, or lose liaison after moving out read write line sensing range, cause the wasting of resources, also make the range of application that can come into operation very limited, cannot be used for as application scenarios such as moving vehicle location.
Summary of the invention
The object of the invention is for solve in prior art active RFID in active RFID tag information interacting method after moving, cause cannot be between label interactive communication shortcoming and a kind of active RFID tag information interacting method being applicable in wireless mobile environment is proposed.
Technical scheme of the present invention is: a kind of active RFID tag information interacting method, specifically comprises:
After S1, fixing active RFID tag initialization, to the mobile active RFID tag in its coverage, periodically send broadcast frame, and wait for the reply of mobile active RFID tag;
After S2, mobile active RFID tag initialization, enter the state of intercepting, when receiving the broadcast frame of fixing active RFID tag transmission, whether the fixing active RFID tag of content judgement of analyzing broadcast frame has communication requirement, if the fixing active RFID tag that sends this broadcast frame is replied, otherwise returns to the state of intercepting;
If the fixing active RFID tag of S3 receives mobile active RFID tag and replys the frame of broadcasting, move active RFID tag with this and enter point-to-point P2P communication pattern, and move active RFID tag transmission P2P Frame to this, otherwise continue periodically to send broadcast frame;
S4, mobile active RFID tag receive P2P Frame, and reply corresponding P2P Frame, until complete with this fixing active RFID label communication.
Further, in described step S1, fixing active RFID tag transmission broadcast frame comprises: protocol number Protocol ID, tag state Tag status, packet length Packet length, fixed labels factory serial number Location tag manufacture ID, fixed labels sequence number Location tag Serial number, command code Command code, command parameter Command arguments, check code CRC.
Further, the broadcast frame that in described step S2, mobile active RFID tag is replied comprises: protocol number Protocol ID, tag state Tag status, packet length Packet length, fixed labels factory serial number Location tag manufacture ID, fixed labels sequence number Location tag Serial number, mobile tag factory serial number Moving tag manufacture ID, mobile tag sequence number Moving tag Serial number, command code Command code, response data Response data, check code CRC.
Further, in described step S3, fix active RFID tag send P2P Frame comprise: protocol number Protocol ID, tag state Tag status, packet length Packet length, mobile tag factory serial number Moving tag manufacture ID, mobile tag sequence number Moving tag Serial number, fixed labels factory serial number Location tag manufacture ID, fixed labels sequence number Location tag Serial number, command code Command code, command parameter Command arguments, check code CRC.
Further, the P2P Frame that in described step S4, mobile active RFID tag is replied comprises: protocol number Protocol ID, tag state Tag status, packet length Packet length, fixed labels factory serial number Location tag manufacture ID, fixed labels sequence number Location tag Serial number, mobile tag factory serial number Moving tag manufacture ID, mobile tag sequence number Moving tag Serial number, command code Command code, response data Response data, check code CRC.
Further, in described step S1, fixing active RFID tag sends the P2P Frame that in the P2P Frame of fixing active RFID tag in the broadcast frame that in broadcast frame, described step S2, mobile active RFID tag is replied, described step S3 and sending, described step S4, mobile active RFID tag is replied and also comprises: identification code Recognition, described identification code is used for identifying sender and recipient's identity.
The invention has the beneficial effects as follows: in a kind of active RFID tag information interacting method of the present invention, fix active RFID tag and mobile active RFID tag is set up correspondence by broadcast frame, set up data transmission relations with P2P Frame, and the broadcast frame that broadcast frame, P2P Frame and mobile active RFID tag that fixing active RFID tag is sent are replied, the form of P2P Frame are defined, not only can effectively must meet the requirement of communication protocol, can also extensively must be applied in the middle of other communication protocols.
Accompanying drawing explanation
Fig. 1 is the FB(flow block) of a kind of active RFID tag information interacting method of the embodiment of the present invention;
Fig. 2 fixes the process flow diagram of active RFID tag in data exchange process in a kind of active RFID tag information interacting method of the embodiment of the present invention;
Fig. 3 is the process flow diagram of mobile active RFID tag in data exchange process in a kind of active RFID tag information interacting method of the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the invention will be further elaborated.
The FB(flow block) that is illustrated in figure 1 a kind of active RFID tag information interacting method of the embodiment of the present invention, it specifically comprises:
After S1, fixing active RFID tag initialization, to the mobile active RFID tag in its coverage, periodically send broadcast frame, and wait for the reply of mobile active RFID tag;
After S2, mobile active RFID tag initialization, enter the state of intercepting, when receiving the broadcast frame of fixing active RFID tag transmission, whether the fixing active RFID tag of content judgement of analyzing broadcast frame has communication requirement, if the fixing active RFID tag that sends this broadcast frame is replied, otherwise returns to the state of intercepting;
If the fixing active RFID tag of S3 receives mobile active RFID tag and replys the frame of broadcasting, move active RFID tag with this and enter point-to-point P2P communication pattern, and move active RFID tag transmission P2P Frame to this, otherwise continue periodically to send broadcast frame;
S4, mobile active RFID tag receive P2P Frame, and reply corresponding P2P Frame, until complete with this fixing active RFID label communication.
Wherein, the form 1 that sends broadcast frame for fixing active RFID tag in described step S1 as shown in table 1, specifically comprises: protocol number Protocol ID, tag state Tag status, packet length Packet length, fixed labels factory serial number Location tag manufacture ID, fixed labels sequence number Location tag Serial number, command code Command code, command parameter Command arguments, check code CRC.
The form 1 of table 1-broadcast frame
Wherein, 1B represents a byte, and certainly, in actual applicable cases, the byte length of each field can be done to adjust to meet communication requirement accordingly.In order further to identify the identity of the fixing active RFID tag of broadcast frame, in the form of broadcast frame, also comprised identification code Recognition, because in actual active RFID communication system, except existing the data interaction of active RFID tag and mobile active RFID tag, also comprise the data interaction between read write line and fixing active RFID tag, read write line and mobile active RFID tag, so in some cases, when a label is received a frame
It can produce and cannot judge is from read write line or label, if which object label cannot distinguish the frame of receiving from, cannot understand content frame by byte.According to this situation, in the present invention program, design increases the field identification code Recognition of 8 bits after protocol fields, and for identifying sender and recipient's identity, form is as follows:
The the 0th to the 3rd bit retains, the the 4th to the 7th bit is with 0, the 1 person's identity that represents sending and receiving successively, approximately be decided to be: 0000 represents that read write line is sent to read write line, 0001 represents that read write line is sent to fixed labels, 0010 represents that read write line is sent to mobile tag, 0011 represents that fixed labels is sent to read write line, 0100 represents that fixed labels is sent to fixed labels, 0101 represents that fixed labels is sent to mobile tag, 0110 represents that mobile tag is sent to read write line, 0111 represents that mobile tag is sent to fixed labels, 1000 represent that mobile tag is sent to mobile tag, 1001 to 1111 temporarily retain.Certainly concrete setting means also can be adjusted according to actual situation, and the form 2 of fixing so active RFID tag transmission broadcast frame is as shown in table 2:
The form 2 of table 2-broadcast frame
As shown in table 3 is the form 1 of the broadcast frame that in described step S2, mobile active RFID tag is replied, specifically comprise: protocol number Protocol ID, tag state Tag status, packet length Packet length, fixed labels factory serial number Location tag manufacture ID, fixed labels sequence number Location tag Serial number, mobile tag factory serial number Moving tag manufacture ID, mobile tag sequence number Moving tag Serial number, command code Command code, response data Response data, check code CRC.
Table 3-moves the form 1 of active RFID tag reply broadcast frame
Same, the form 2 that has increased the broadcast frame that the mobile active RFID tag of identification code replys is as shown in table 4:
Table 4-moves the form 2 of active RFID tag reply broadcast frame
As shown in table 5 is the form 1 of fixing the P2P Frame of active RFID tag transmission in described step S3, specifically comprise: protocol number Protocol ID, tag state Tag status, packet length Packet length, mobile tag factory serial number Moving tag manufacture ID, mobile tag sequence number Moving tag Serial number, fixed labels factory serial number Location tag manufacture ID, fixed labels sequence number Location tag Serial number, command code Command code, command parameter Command arguments, check code CRC.
The form 1 of table 5-P2P Frame
Same, the form 2 of P2P Frame that has increased identification code is as shown in table 6:
The form 2 of table 6-P2P Frame
As shown in table 7 is the form 1 of the P2P Frame that in described step S4, mobile active RFID tag is replied, specifically comprise: protocol number Protocol ID, tag state Tag status, packet length Packet length, fixed labels factory serial number Location tag manufacture ID, fixed labels sequence number Location tag Serial number, mobile tag factory serial number Moving tag manufacture ID, mobile tag sequence number Moving tag Serial number, command code Command code, response data Response data, check code CRC.
Table 7-moves the form 1 of the P2P Frame of active RFID tag reply
Same, the form 2 that has increased the P2P Frame that the mobile active RFID tag of identification code replys is as shown in table 8:
Table 8-moves the form 2 of the P2P Frame of active RFID tag reply
For those skilled in the art can understand and implement technical solution of the present invention, will respectively the course of work of read write line and vehicle-mounted mobile active RFID tag be described in detail below:
Be illustrated in figure 2 the process flow diagram of fixing active RFID tag in data exchange process, for fixing active RFID tag, after initial work, periodically start to send broadcast frame, to detect in its communication range, whether there are other mobile tags to have and send communicating requirement, if do not receive response, continue periodic broadcast, if receive mobile active RFID tag, reply the frame of broadcast, enter point-to-point P2P communication mode, to target, move active RFID tag and send P2P Frame, mobile active RFID tag is replied corresponding P2P format data frame, until communication task completes.
Be illustrated in figure 3 the process flow diagram of mobile active RFID tag in data exchange process, for mobile active RFID tag, after initial work in moving process in the state of intercepting, to detect the broadcast frame that whether has fixed labels to exist in its communication range and sent band order, if do not receive response, continue to intercept, if receive the frame of mobile active RFID tag broadcast, and this broadcast frame is analyzed, if requiring to move active label with this, this broadcast frame communicates, to this fixing active label, reply broadcast frame, after enter and enter point-to-point P2P communication mode, fixed labels can start to send P2P Frame to the active mobile tag of target, mobile active RFID tag is replied corresponding P2P format data frame, until communication task completes.
Those of ordinary skill in the art will appreciate that, embodiment described here is in order to help reader understanding's principle of the present invention, should be understood to that the protection domain of invention is not limited to such special statement and embodiment.Everyly according to foregoing description, make various possible being equal to and replace or change, be all considered to belong to the protection domain of claim of the present invention.
Claims (6)
1. an active RFID tag information interacting method, is characterized in that, specifically comprises:
After S1, fixing active RFID tag initialization, to the mobile active RFID tag in its coverage, periodically send broadcast frame, and wait for the reply of mobile active RFID tag;
After S2, mobile active RFID tag initialization, enter the state of intercepting, when receiving the broadcast frame of fixing active RFID tag transmission, whether the fixing active RFID tag of content judgement of analyzing broadcast frame has communication requirement, if the fixing active RFID tag that sends this broadcast frame is replied, otherwise returns to the state of intercepting;
If the fixing active RFID tag of S3 receives mobile active RFID tag and replys the frame of broadcasting, move active RFID tag with this and enter point-to-point P2P communication pattern, and move active RFID tag transmission P2P Frame to this, otherwise continue periodically to send broadcast frame;
S4, mobile active RFID tag receive P2P Frame, and reply corresponding P2P Frame, until complete with this fixing active RFID label communication.
2. a kind of active RFID tag information interacting method as claimed in claim 1, it is characterized in that, in described step S1, fix active RFID tag transmission broadcast frame and comprise: protocol number Protocol ID, tag state Tag status, packet length Packet length, fixed labels factory serial number Location tag manufacture ID, fixed labels sequence number Location tag Serial number, command code Command code, command parameter Command arguments, check code CRC.
3. a kind of active RFID tag information interacting method as claimed in claim 1, it is characterized in that, the broadcast frame that in described step S2, mobile active RFID tag is replied comprises: protocol number Protocol ID, tag state Tag status, packet length Packet length, fixed labels factory serial number Location tag manufacture ID, fixed labels sequence number Location tag Serial number, mobile tag factory serial number Moving tag manufacture ID, mobile tag sequence number Moving tag Serial number, command code Command code, response data Response data, check code CRC.
4. a kind of active RFID tag information interacting method as claimed in claim 1, it is characterized in that, the P2P Frame of fixing active RFID tag transmission in described step S3 comprises: protocol number Protocol ID, tag state Tag status, packet length Packet length, mobile tag factory serial number Moving tag manufacture ID, mobile tag sequence number Moving tag Serial number, fixed labels factory serial number Location tag manufacture ID, fixed labels sequence number Location tag Serial number, command code Command code, command parameter Command arguments, check code CRC.
5. a kind of active RFID tag information interacting method as claimed in claim 1, it is characterized in that, the P2P Frame that in described step S4, mobile active RFID tag is replied comprises: protocol number Protocol ID, tag state Tag status, packet length Packet length, fixed labels factory serial number Location tag manufacture ID, fixed labels sequence number Location tag Serial number, mobile tag factory serial number Moving tag manufacture ID, mobile tag sequence number Moving tag Serial number, command code Command code, response data Response data, check code CRC.
6. a kind of active RFID tag information interacting method as described in claim 2 to 5 any one, it is characterized in that, in described step S1, fixing active RFID tag sends the P2P Frame that in the P2P Frame of fixing active RFID tag in the broadcast frame that in broadcast frame, described step S2, mobile active RFID tag is replied, described step S3 and sending, described step S4, mobile active RFID tag is replied and also comprises: identification code Recognition, described identification code is used for identifying sender and recipient's identity.
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| CN101794369A (en) * | 2009-02-02 | 2010-08-04 | 釜山国立大学校产学协力园 | Active RFID system for port logistics using multi-hop communication and communication method of the same |
| CN102393896A (en) * | 2011-07-11 | 2012-03-28 | 成都西谷曙光数字技术有限公司 | Simple and accurate radio frequency positioning system and method |
| CN103093170A (en) * | 2013-01-16 | 2013-05-08 | 深圳市中兴长天信息技术有限公司 | Electronic tag fast recognition method and device |
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2013
- 2013-12-31 CN CN201310751137.6A patent/CN103761548B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5686902A (en) * | 1990-06-15 | 1997-11-11 | Texas Instruments Incorporated | Communication system for communicating with tags |
| CN101051356A (en) * | 2007-05-16 | 2007-10-10 | 上海华龙信息技术开发中心 | Novel active radio frequency identifying system and its operationn method |
| US20100182128A1 (en) * | 2008-01-04 | 2010-07-22 | Chung-Ang University Industry-Academic Cooperation Foundation | Tag identification method, tag anticollision method, rfid tag |
| CN101794369A (en) * | 2009-02-02 | 2010-08-04 | 釜山国立大学校产学协力园 | Active RFID system for port logistics using multi-hop communication and communication method of the same |
| CN102393896A (en) * | 2011-07-11 | 2012-03-28 | 成都西谷曙光数字技术有限公司 | Simple and accurate radio frequency positioning system and method |
| CN103093170A (en) * | 2013-01-16 | 2013-05-08 | 深圳市中兴长天信息技术有限公司 | Electronic tag fast recognition method and device |
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