CN101727565A - Radio frequency identification system using multi-channel transmission to avoid packet collision - Google Patents
Radio frequency identification system using multi-channel transmission to avoid packet collision Download PDFInfo
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- CN101727565A CN101727565A CN200810218771A CN200810218771A CN101727565A CN 101727565 A CN101727565 A CN 101727565A CN 200810218771 A CN200810218771 A CN 200810218771A CN 200810218771 A CN200810218771 A CN 200810218771A CN 101727565 A CN101727565 A CN 101727565A
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Abstract
The invention relates to a radio frequency identification system using the multi-channel transmission to avoid the packet collision. The radio frequency identification system comprises a plurality of radio frequency identification tag groups and at least on radio frequency identification reader. Each radio frequency identification tag group comprises at least one radio frequency identification tag. The radio frequency identification tag(s) in the same radio frequency identification tag group is (are) transmitted in the same transmission band, and the radio frequency identification tags in different radio frequency identification tag groups are transmitted in different transmission bands. When the radio frequency identification reader simultaneously receives the radio signals sent by all the radio frequency identification tags in the radio frequency identification tag groups, the packet collision of the radio frequency identification tags can be avoided because the radio frequency identification tags are transmitted in different transmission bands.
Description
Technical field
The present invention is about a kind of radio frequency identification system of avoiding packet collision, particularly about a kind of radio frequency identification system of avoiding packet collision with the multichannel transmission.
Background technology
Radio frequency identification system (RFID, Radio Frequency Identification), mainly be to utilize the radio wave transmissions data, to reach a kind of advanced technology of automatic identification object, it mainly comprises two parts, wireless radio frequency identification mark (RFID Tag) and radio frequency identification reading device (RFID Reader).
Wireless radio frequency identification mark is assembled through special packaging technology by a chip and an antenna element that contains unique identifier (UID).Usually radio frequency identification can be divided into active according to the energy method of supplying and two kinds of passive types, and its difference is the active battery that has, and passive type does not then have, because label of passive type itself and non-transformer, its electric energy must be through the reading device supply.Radio frequency identification reading device is then by antenna, radio transceiver chip, and data processing module constitutes.Generally speaking, the main interactive relationship of reading device and label comprises:
(1) electromagnetic energy is sent out via antenna by reading device, label is the antenna of utilization itself then, receives from the electromagnetic energy that reading device transmitted, and is converted to the required electric energy of inside chip work;
(2) reading device must receive the data of the identification code of inside being sent out by electronic tag after suitably handling, and carries out identification and handles;
(3) if electronic tag contains writeable internal memory, reading device can be sent to electronic tag with the data data, carries out data input operation.
Passive label because do not contain battery, has advantages such as long service life, volume are little, low price.Because what radio frequency identification stored is numerical data, so application end can utilize and encrypt or manner of decryption reaches secret effect, and is well suited for information flow.Be applied as aviation passenger and luggage administrative system, shelf and pallet management, shipping management, logistics management etc. topmost now.
In some cases, radio frequency identification reading device need read most wireless radio frequency identification marks simultaneously, the label signal that read this moment may have collision problem, if wireless radio frequency identification mark transmits signal one by one, read rate is high naturally, but when most wireless radio frequency identification marks passed through radio frequency identification reading device simultaneously, the technology of handling the collision of label signal was just very important.
The signal collision (Signal Collision) of radio frequency identification system generally can be divided into collision of label signal and reading device signal collision two big classes, the former is meant the signal of receiving a plurality of label simultaneously and being returned with reading device, cause accurately interpretation or erroneous judgement, the latter then is that the order of receiving a plurality of reading device simultaneously and sent with label is so that cause conflict.The signal collision can cause signal transmission failure, run off, even the deciphering of signal mistake forms error in data or the like, the obstruction of formation identification.
The method that solves the collision of wireless radio frequency identification mark transmission generation signal at present in industry adopts TCM transmission process (Time Division Multiple Access mostly, TDMA) technology, control each radio frequency identification reading device carries out the signal transmission in different time points transmission, but this kind processing mode is applicable in the less radio frequency identification system of radio frequency identification reading device number, in case when the radio frequency identification reading device number that cloth is built reaches a ratio, the usefulness of system and fiduciary level will begin to descend thereupon.
Summary of the invention
The technical matters of institute of the present invention desire solution
Yet in known techniques, the signal impacting technology that prevents with the TCM transmission process has the restriction of first the sky, when the radio frequency identification reading device that meaning is promptly built at cloth reaches some, easily cause the too high problem of timesharing frequency in the time cycle, cause the reliability of entire system to reduce.
Edge this, one of the present invention purpose promptly provides and a kind ofly produces frequency displacement to avoid the method for packet collision when wireless radio frequency identification mark loopback label signal, guarantees that wireless radio frequency identification mark is difficult for taking place the signal collision at loopback label information to radio frequency identification reading device device.
The technological means that the present invention deals with problems
The technological means that the present invention is adopted by the problem that solves known techniques is a kind ofly to transmit the radio frequency identification system of avoiding packet collision with multichannel, and it includes several wireless radio frequency identification mark groups and at least one radio frequency identification reading device.Wireless radio frequency identification mark group includes at least one wireless radio frequency identification mark, wireless radio frequency identification mark in the same wireless radio frequency identification mark group carries out wireless transmission with identical transmission band, and the wireless radio frequency identification mark of different wireless radio frequency identification mark groups carries out wireless transmission with different transmission band.Each wireless radio frequency identification mark includes a microprocessor, is connected with an internal storage location, a radio frequency transceiving module respectively, in order to receive and dispatch the wireless signal of predetermined transmission band.Radio frequency identification reading device includes a microprocessor, be connected with an internal storage location and a multi-channel wireless radio-frequency (RF) receiving and transmission module respectively, the multi-channel wireless radio-frequency (RF) receiving and transmission module can also be several several radio frequency transceiving module, in order to the wireless signal of transmitting-receiving corresponding to the transmission band of each wireless radio frequency identification mark group.The wireless radio frequency identification mark of each wireless radio frequency identification mark group is during at the same time with radio frequency identification reading device transmitting/receiving wireless signal, because each wireless radio frequency identification mark group works in the frequency of operation of difference, make between the wireless radio frequency identification mark of each wireless radio frequency identification mark group and avoid taking place packet collision.
The present invention contrasts the effect of prior art
Via the technological means that the present invention adopted, can be so that when the number of wireless radio frequency identification mark increases in radio frequency identification system, utilize simple and easy hardware design means, avoid the situation of signal packet collision effectively, make its integrality that is maintained system reliability and data transmission, reduce the erroneous judgement that causes because of packet collision or the omission of data read.Simultaneously, can also reduce because of cloth and build the required great amount of cost cost of radio frequency identification reading device quantity in the radio frequency identification system, effectively reduce the cost that hardware cloth is built.
Specific embodiment of the present invention will and attachedly be the further explanation of graphic do by following embodiment.
Description of drawings
Fig. 1 shows the synoptic diagram of first embodiment of the invention;
Fig. 2 shows that the system of first embodiment of the invention forms calcspar;
Fig. 3 shows that the wireless signal of the wireless radio frequency identification mark of first embodiment of the invention transmits synoptic diagram;
Fig. 4 shows that the system of second embodiment of the invention forms calcspar.
Embodiment
Fig. 1 shows the synoptic diagram of first embodiment of the invention.As shown in the figure, radio frequency identification system 100 comprises the G1 of several wireless radio frequency identification mark groups, G2, G3, wherein the G1 of wireless radio frequency identification mark group includes wireless radio frequency identification mark 1a, 1b, 1c, the G2 of wireless radio frequency identification mark group includes wireless radio frequency identification mark 2a, 2b, 2c, and the G3 of wireless radio frequency identification mark group includes wireless radio frequency identification mark 3a, 3b, 3c.Wireless radio frequency identification mark in the wherein same wireless radio frequency identification mark group carries out wireless transmission with identical transmission band, and the wireless radio frequency identification mark of different wireless radio frequency identification mark groups carries out wireless transmission with different transmission band, because during wireless transmission, may be because of the factor that intraware wears out or external environment condition is disturbed, and cause signal when transmitting frequency drift thus with the positive and negative interval of a certain frequency as transmission band, in order to avoid omit the reception of signal.Therefore, each G1 of wireless radio frequency identification mark group, G2, G3 can transfer to a radio frequency identification reading device 4 via wireless signal S1, S2, a S3 with different transmission band transmission respectively, and can be with data transmission to one of be connected main control equipment 5 with radio frequency identification reading device 4.Though be example with three wireless radio frequency identification mark groups in the present embodiment, have the knack of this skill person when knowing that the group number of application is not so limited.
Consult Fig. 2, its system that shows first embodiment of the invention forms calcspar.As shown in the figure, this figure explains with the G1 of each wireless radio frequency identification mark group, one of them wireless radio frequency identification mark of G2, G3 among Fig. 1 respectively.Wireless radio frequency identification mark 1a with the G1 of wireless radio frequency identification mark group is an example, and it comprises a microprocessor 11a, is connected with a radio frequency transceiving module 12a, an internal storage location 13a, a supply of electrical energy unit 14a respectively.Wherein internal storage location 13a stores a label information 131a, and label information 131a includes a tag recognition sign indicating number 132a and a tag identification data 133a.
Similarly, the wireless radio frequency identification mark 2a of the G2 of wireless radio frequency identification mark group comprises a microprocessor 21a, is connected with a radio frequency transceiving module 22a, an internal storage location 23a, a supply of electrical energy unit 24a respectively.Wherein internal storage location 23a stores a label information 231a, and label information 231a includes a tag recognition sign indicating number 232a and a tag identification data 233a.
With above-mentioned both similarly, the wireless radio frequency identification mark 3a of the G3 of wireless radio frequency identification mark group comprises a microprocessor 31a, is connected with a radio frequency transceiving module 32a, an internal storage location 33a, a supply of electrical energy unit 34a respectively.Wherein internal storage location 33a stores a label information 331a, and label information 331a includes a tag recognition sign indicating number 332a and a tag identification data 333a.
Radio frequency transceiving module 12a, the 12b of each wireless radio frequency identification mark 1a, 2a, 3a, 12c work in a predetermined transmission band respectively, have this wireless signal S1, S2, S3 in order to transmitting-receiving, and tag recognition sign indicating number 132a, 232a, 332a or tag identification data 133a, 233a, the 333a of each wireless radio frequency identification mark 1a, 2a, 3a can be launched via wireless signal S1, S2, S3 respectively with different transmission band transmission.
Radio frequency identification reading device 4 includes a microprocessor 41, is connected with a multi-channel wireless radio-frequency (RF) receiving and transmission module 42, an internal storage location 43 and a linkage interface 44 respectively.Multi-channel wireless radio-frequency (RF) receiving and transmission module 42 is in order to wireless signal S1, S2, the S3 of transmitting-receiving corresponding to the predetermined different transmission band of the G1 of each wireless radio frequency identification mark group, G2, G3.And linkage interface 44 is in order to connecting main control equipment 5, with the data transmission that will receive to main control equipment 5 storages or carry out data processing.
Consult Fig. 3, its wireless signal that shows the wireless radio frequency identification mark of first embodiment of the invention transmits synoptic diagram.As shown in the figure, owing to the G1 of each wireless radio frequency identification mark group, G2, G3 carry out wireless transmission with different transmission band, so on frequency axis F, represent with Frequency point f1, f2, f3 respectively respectively.In the present embodiment, each G1 of wireless radio frequency identification mark group, wireless radio frequency identification mark 1a, the 1b of G2, G3,1c, 2a, 2b, 2c, 3a, 3b, 3c are the active wireless radio frequency identification label, utilize its supply of electrical energy unit to supply required electric energy, to launch wireless signal S1, S2, S3 on one's own initiative.When radio frequency identification reading device 4 is received from wireless signal S1, S2 that each G1 of wireless radio frequency identification mark group, G2, G3 send, S3, owing to use with different transmission band, and definition has predetermined frequency safe spacing between each transmission band, can make to avoid between each G1 of wireless radio frequency identification mark group, G2, the G3 because of working in same frequency the situation of packet collision taking place.Present embodiment is an example with the active wireless radio frequency identification label only, but those who familiarize themselves with the technology ought know that the passive type wireless radio frequency identification mark also is one of the mode that can implement, does not repeat them here in this field.
Consult Fig. 4, its system that shows second embodiment of the invention forms calcspar.As shown in the figure, present embodiment is identical mostly with system's composition of first embodiment, so identical assembly indicates with same reference numbers, repeats no more.Similarly, the radio frequency identification reading device 4a of present embodiment radio frequency identification system 100 ' includes microprocessor 41, is connected with several radio frequency transceiving module 42a, 42b, 42c, internal storage location 43 and a linkage interface 44 respectively.
Wherein the function of each assembly is identical with first embodiment, the radio frequency identification reading device 4a that main difference part is present embodiment corresponds respectively to the transmission band of each G1 of wireless radio frequency identification mark group, G2, G3 with each radio frequency transceiving module 42a, 42b, 42, and in order to receive and dispatch the G1 of each wireless radio frequency identification mark group, wireless radio frequency identification mark 1a, the 2a of G2, G3, label information 131a, the 231a of 3a, 331a.And avoid the method for packet collision and principle identical between its each each G1 of wireless radio frequency identification mark group, G2, G3, so do not give unnecessary details in the hope of succinctly at this with first embodiment.
By above embodiment as can be known, the value on the true tool industry of radio frequency identification system of avoiding packet collision with the multichannel transmission provided by the present invention was so the present invention had accorded with the important document of patent already.Only above narration only is the present invention's preferred embodiment explanation, allly is skillful in this skill person when doing other all improvement according to above-mentioned explanation, only these change the invention spirit that still belongs to the present invention and below in the claim that defined.
Claims (10)
1. avoid the radio frequency identification system of packet collision with multichannel transmission for one kind, it is characterized in that, comprising:
Several wireless radio frequency identification mark groups, this wireless radio frequency identification mark group includes at least one wireless radio frequency identification mark with label information, wireless radio frequency identification mark in the same wireless radio frequency identification mark group carries out wireless transmission with an identical transmission band, and the wireless radio frequency identification mark of different wireless radio frequency identification mark groups carries out wireless transmission with different transmission band;
At least one radio frequency identification reading device includes a multi-channel wireless radio-frequency (RF) receiving and transmission module, in order to the label information of the wireless radio frequency identification mark of receiving and dispatching this each wireless radio frequency identification mark group.
According to claim 1 avoid the radio frequency identification system of packet collision with multichannel transmission, it is characterized in that this wireless radio frequency identification mark includes a microprocessor, this microprocessor is connected with an internal storage location and a radio frequency transceiving module.
3. as avoiding the radio frequency identification system of packet collision with the multichannel transmission as described in the claim 2, it is characterized in that, the microprocessor of this wireless radio frequency identification mark more is connected with a supply of electrical energy unit, in order to provide this wireless radio frequency identification mark required electric energy.
According to claim 1 avoid the radio frequency identification system of packet collision with multichannel transmission, it is characterized in that, this label information includes a tag recognition sign indicating number and a tag identification data, and this tag identification data includes one of a label dump power information, a label mode information, a firmware version information, a software version information, a transmitting bandwidth information, a transmission power information, a legal information, the affiliated manufacturer's information of a label and the affiliated group information of a label or its combination.
According to claim 1 avoid the radio frequency identification system of packet collision with multichannel transmission, it is characterized in that this radio frequency identification reading device more comprises a linkage interface, in order to connect a main control equipment.
6. avoid the radio frequency identification system of packet collision with multichannel transmission for one kind, it is characterized in that, comprising:
Several wireless radio frequency identification mark groups, this wireless radio frequency identification mark group includes at least one wireless radio frequency identification mark with label information, wireless radio frequency identification mark in the same wireless radio frequency identification mark group carries out wireless transmission with an identical transmission band, and the wireless radio frequency identification mark of different wireless radio frequency identification mark groups carries out wireless transmission with different transmission band;
At least one radio frequency identification reading device, include several radio frequency transceiving module, correspond respectively to the transmission band of this wireless radio frequency identification mark group, in order to the label information of the wireless radio frequency identification mark of receiving and dispatching this each wireless radio frequency identification mark group.
7. as avoiding the radio frequency identification system of packet collision with the multichannel transmission as described in the claim 6, it is characterized in that this wireless radio frequency identification mark includes a microprocessor, this microprocessor is connected with an internal storage location and a radio frequency transceiving module.
8. as avoiding the radio frequency identification system of packet collision with the multichannel transmission as described in the claim 7, it is characterized in that, the microprocessor of this wireless radio frequency identification mark more is connected with a supply of electrical energy unit, in order to provide this wireless radio frequency identification mark required electric energy.
9. as avoiding the radio frequency identification system of packet collision with the multichannel transmission as described in the claim 6, it is characterized in that, this label information includes a tag recognition sign indicating number and a tag identification data, and this tag identification data includes one of a label dump power information, a label mode information, a firmware version information, a software version information, a transmitting bandwidth information, a transmission power information, a legal information, the affiliated manufacturer's information of a label and the affiliated group information of a label or its combination.
10. as avoiding the radio frequency identification system of packet collision with the multichannel transmission as described in the claim 6, it is characterized in that this radio frequency identification reading device more comprises a linkage interface, in order to connect a main control equipment.
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| CN2008102187712A CN101727565B (en) | 2008-10-31 | 2008-10-31 | Radio frequency identification system using multi-channel transmission to avoid packet collision |
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| CN2008102187712A CN101727565B (en) | 2008-10-31 | 2008-10-31 | Radio frequency identification system using multi-channel transmission to avoid packet collision |
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| CN101727565A true CN101727565A (en) | 2010-06-09 |
| CN101727565B CN101727565B (en) | 2012-05-30 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102509136A (en) * | 2011-11-16 | 2012-06-20 | 哈尔滨工程大学 | Multi-microcontroller radio frequency identification read-write device and data transmission method thereof |
| CN103729661A (en) * | 2012-10-15 | 2014-04-16 | 成都西谷曙光数字技术有限公司 | System and method for read-write operation of active electronic tags with ultra-low power consumption |
| CN103916966A (en) * | 2012-12-31 | 2014-07-09 | 西门子公司 | RFID system control method and control apparatus |
| CN104036207A (en) * | 2013-03-06 | 2014-09-10 | 南京邮电大学 | Multi-channel RFID tag graded-reading system and operation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1584910A (en) * | 2004-05-28 | 2005-02-23 | 上海轶龙应用软件开发有限公司 | Electronic label reading method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102509136A (en) * | 2011-11-16 | 2012-06-20 | 哈尔滨工程大学 | Multi-microcontroller radio frequency identification read-write device and data transmission method thereof |
| CN102509136B (en) * | 2011-11-16 | 2015-03-11 | 哈尔滨工程大学 | Multi-microcontroller radio frequency identification read-write device and data transmission method thereof |
| CN103729661A (en) * | 2012-10-15 | 2014-04-16 | 成都西谷曙光数字技术有限公司 | System and method for read-write operation of active electronic tags with ultra-low power consumption |
| CN103729661B (en) * | 2012-10-15 | 2017-07-11 | 成都西谷曙光数字技术有限公司 | A kind of super low-power consumption active electronic label read-write system and method |
| CN103916966A (en) * | 2012-12-31 | 2014-07-09 | 西门子公司 | RFID system control method and control apparatus |
| CN103916966B (en) * | 2012-12-31 | 2018-07-27 | 西门子公司 | A kind of RFID system control method and control device |
| CN104036207A (en) * | 2013-03-06 | 2014-09-10 | 南京邮电大学 | Multi-channel RFID tag graded-reading system and operation method thereof |
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| CN101727565B (en) | 2012-05-30 |
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Owner name: HANDA PRECISION ELECTRONIC (KUNSHAN) CO., LTD. Free format text: FORMER OWNER: FOSHAN SHUNDE DISTRICT MITAC PRECISION TECHNOLOGY CO., LTD. Effective date: 20130704 |
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Effective date of registration: 20130704 Address after: 215300 No. second, 269 Avenue, comprehensive bonded area, Jiangsu, Kunshan Patentee after: Mitac Precision Technology (Kunshan) Corp. Address before: 528308 Guangdong Province, Foshan city Shunde District Lunjiao Street Chung Hei Lun Xing Zhong Lu Patentee before: Foshan Shunde District Mitac Precision Technology Co., Ltd. |