CN102982294B - A kind of collision detection method utilizing magnetic two-way communication - Google Patents
A kind of collision detection method utilizing magnetic two-way communication Download PDFInfo
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- CN102982294B CN102982294B CN201110260404.0A CN201110260404A CN102982294B CN 102982294 B CN102982294 B CN 102982294B CN 201110260404 A CN201110260404 A CN 201110260404A CN 102982294 B CN102982294 B CN 102982294B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10019—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers.
- G06K7/10029—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers. the collision being resolved in the time domain, e.g. using binary tree search or RFID responses allocated to a random time slot
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Abstract
The present invention relates to a kind of collision detection method utilizing magnetic two-way communication, be applied to the near field communication system comprising at least one first magnetic radio-frequency unit and at least one the second magnetic radio-frequency unit, described method comprises the steps: to utilize magnetic channel and a second magnetic radio-frequency unit to carry out magnetic communication access; And first magnetic radio-frequency unit further by magnetic channels transmit collision detection request signal, and according to whether receiving the response signal of collision detection request signal, judged whether that multiple second magnetic radio-frequency unit conflicts mutually.The collision detection method utilizing magnetic two-way communication provided by the invention, the response signal of its collision detection request signal and collision detection request signal is all transmitted by magnetic channel, does not affect the time that radio frequency is mutual, improves communication efficiency to a certain extent.
Description
Technical field
The present invention relates to wireless communication field, be specifically related to a kind of collision detection method utilizing magnetic two-way communication.
Background technology
Along with popularizing of mobile terminal, the demand utilizing mobile terminal to carry out paying by mails becomes very urgent.There is multiple implementation at present, wherein a kind of scheme is realized by integrated 2.4G radio-frequency communication module, magnetic signal magnetic induction module in the smart cards such as SIM cards of mobile phones or SD card, the magnetic communication of this scheme is one-way communication, detect the magnetic signal intensity that is coupled to by being contained in SIM card in mobile phone or SD card and receiving magnetic information, the radio-frequency communication module activated on SIM card or SD card carries out rf data exchange.This rf data switching method has been widely used in that stored value card pays, numerous areas to be swiped the card etc. by public transport subway.
Be in the radio-frequency (RF) communication system of one-way communication in magnetic communication, card reader as the first magnetic radio-frequency unit sends magnetic information, cross as the SIM card being contained in mobile phone of the second magnetic radio-frequency unit or SD cartoon the magnetic signal intensity that detects and be coupled to and receive magnetic information, activate the radio-frequency communication module on SIM card or SD card, to carry out radio frequency access.Whether, after access completes, the first magnetic radio-frequency unit sends collision detection request on magnetic channel, have multiple second magnetic radio-frequency unit to conflict mutually to detect, and periodically in radio-frequency channel inquire-receive whether have conflict response.Suppose now have two the second magnetic radio-frequency unit A to conflict with B phase, wherein the second magnetic radio-frequency unit A completes access with the first magnetic radio-frequency unit, when therefore the second magnetic radio-frequency unit A receives this collision detection request, ignores this collision detection request; And the second magnetic radio-frequency unit B does not connect with the first radio-frequency unit, when therefore the second magnetic radio-frequency unit B receives this collision detection request, think and there occurs conflict, conflict response is replied in radio-frequency channel.
Therefore, be in the radio-frequency (RF) communication system of one-way communication in magnetic communication, the collision detection method adopted, conflict response is replied in radio-frequency channel, first magnetic radio-frequency unit must periodically in radio-frequency channel inquire-receive whether have conflict response, occupy normal radio frequency interaction time, cause the first magnetic radio-frequency unit and the second magnetic radio-frequency unit carry out swiping the card time of concluding the business elongated.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of collision detection method utilizing magnetic two-way communication, the problem that the time that the detection that avoids conflict causes carrying out communicating between the first magnetic radio-frequency unit with the second magnetic radio-frequency unit is elongated.
The present invention is in order to solve the problems of the technologies described above, disclose a kind of collision detection method utilizing magnetic two-way communication, be applied to the near field communication system comprising at least one first magnetic radio-frequency unit and at least one the second magnetic radio-frequency unit, it is characterized in that, described method comprises the steps:
First magnetic radio-frequency unit utilizes magnetic channel and a second magnetic radio-frequency unit to carry out magnetic communication access; And
First magnetic radio-frequency unit further by magnetic channels transmit collision detection request signal, and according to whether receiving the response signal of collision detection request signal, has judged whether that multiple second magnetic radio-frequency unit conflicts mutually.
Further, described first magnetic radio-frequency unit further by magnetic channels transmit collision detection request signal, and according to whether receiving the response signal of collision detection request signal, has judged whether that the afoul method of multiple second magnetic radio-frequency unit comprises the steps:
First magnetic radio-frequency unit by magnetic channels transmit collision detection request signal, and receives the response signal of collision detection request signal in magnetic channel;
If described first magnetic radio-frequency unit does not receive the response signal of collision detection request signal, then judge that it does not exist conflict;
If described first magnetic radio-frequency unit receives the response signal of collision detection request signal, then judge have multiple second magnetic radio-frequency unit to conflict mutually.
Further, described first magnetic radio-frequency unit is by magnetic channels transmit collision detection request signal, and the method receiving the response signal of collision detection request signal in magnetic channel comprises the steps:
Described certain second magnetic radio-frequency unit carrying out magnetic communication access with the first magnetic radio-frequency unit receives magnetic signal information by magnetic channel, and resolve to judge whether this magnetic signal is collision detection request signal to the magnetic signal received, if the magnetic signal received is collision detection request signal, then ignore this collision detection request signal;
Described other the second magnetic radio-frequency units not carrying out magnetic communication access with the first magnetic radio-frequency unit receive magnetic signal information by magnetic channel, and resolve to judge whether this magnetic signal is collision detection request signal to the magnetic signal received, if the magnetic signal received is collision detection request signal, then reply conflict response signal by magnetic channel.
Further, if described first magnetic radio-frequency unit does not receive the response signal of collision detection request signal, when judging that it does not exist conflict, set up radio communication further between described first magnetic radio-frequency unit and the second magnetic radio-frequency unit carrying out magnetic communication access, complete rf data mutual.
Further, if described first magnetic radio-frequency unit receives the response signal of collision detection request signal, when judging have multiple second magnetic radio-frequency unit to conflict mutually, disconnect between described first magnetic radio-frequency unit and the second magnetic radio-frequency unit carrying out magnetic communication access.
The beneficial effect of employing the invention described above technical scheme is: the collision detection between described first magnetic radio-frequency unit and described second magnetic radio-frequency unit, its collision detection request signal and conflict response signal are all transmitted by magnetic channel, whole process does not need radio-frequency module to participate in, do not affect the time that radio frequency is mutual, improve the communication efficiency of the first magnetic radio-frequency unit and the second magnetic radio-frequency unit to a certain extent.
Accompanying drawing explanation
Fig. 1 be utilize the collision detection of magnetic two-way communication in the embodiment of the present invention practice figure;
Fig. 2 is the method flow diagram of the collision detection utilizing magnetic two-way communication in the embodiment of the present invention.
Embodiment
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
One embodiment of the invention discloses a kind of collision detection method utilizing magnetic two-way communication, is applied to the near field communication system comprising at least one first magnetic radio-frequency unit and at least one the second magnetic radio-frequency unit.In this inventive embodiments, described first magnetic radio-frequency unit can be card reader part; Described second magnetic radio-frequency unit can be the SIM card, UIM card, usim card, TF card or the SD card that are placed in mobile terminal or are placed in mobile terminal, wherein, described mobile terminal refers to transportable terminal, can be mobile phone, personal digital assistant PDA or notebook computer etc.
Fig. 1 be utilize the collision detection of magnetic two-way communication in the embodiment of the present invention practice figure, as shown in Figure 1:
In this embodiment, described first magnetic radio-frequency unit 100 launches magnetic information, described second magnetic radio-frequency unit receives magnetic information by detecting the magnetic signal intensity that is coupled to, and send feedback information to the first magnetic radio-frequency unit 100 by magnetic channel after the magnetic information received is resolved, determine that the identity of communicating pair is legal to make the both sides preparing to carry out radio communication utilize field signal to carry out two-way communication before access radio communication.But, because magnetic signal intensity is propagated in space, therefore, if when have accumulated multiple second magnetic radio-frequency unit (200,300) within the scope of the efficient communication of described first magnetic radio-frequency unit 100 simultaneously, will cause judging which the second magnetic radio-frequency unit is sensed by the first magnetic radio-frequency unit 100 and will carry out rf data with it alternately, usual this situation is referred to as conflict; If the second magnetic radio-frequency unit 200 in Fig. 1 and the second magnetic radio-frequency unit 300 are all within the scope of the efficient communication of the first magnetic radio-frequency unit 100, then it is which the second magnetic radio-frequency unit is sensed by the first magnetic radio-frequency unit 100 and will conclude the business with it that two users holding the second magnetic radio-frequency unit 200 and hold the second magnetic radio-frequency unit 300 cannot determine the end.Based on this, the invention provides a kind of collision detection method utilizing magnetic two-way communication, the method utilizes magnetic two-way communication to carry out identity validation between described first magnetic radio-frequency unit and certain the second magnetic radio-frequency unit, completes magnetic communication access; But before access radio communication, according to whether receiving the response signal of collision detection request signal, described first magnetic radio-frequency unit by magnetic channels transmit collision detection request signal, and has judged whether that multiple second magnetic radio-frequency unit conflicts mutually; If the first magnetic radio-frequency unit is after conflict being detected, disconnects with certain the second magnetic radio-frequency unit connected, shut the book, to avoid because user cannot judge it is the sensed and transaction of which the second magnetic radio-frequency unit and the loss that produces.
It should be noted that in addition, it is reciprocity to described second magnetic radio-frequency unit 200 in structure, resource with described second magnetic radio-frequency unit 300, can think two identical devices of function, and just respective possessor is different.
Fig. 2 is the method flow diagram of the collision detection utilizing magnetic two-way communication in the embodiment of the present invention, as shown in Figure 2, magnetic two-way communication is utilized to carry out identity validation between described first magnetic radio-frequency unit and certain the second magnetic radio-frequency unit, complete magnetic communication access, but before access radio communication, described first magnetic radio-frequency unit is by magnetic channels transmit collision detection request signal, and judged whether that multiple second magnetic radio-frequency unit conflicts mutually according to whether receiving the response signal of collision detection request signal, describedly judge that the method for conflict comprises the steps:
Step S201: the first magnetic radio-frequency unit by magnetic channels transmit collision detection request signal, and receives the response signal of collision detection request signal in magnetic channel;
In the present embodiment, described certain second magnetic radio-frequency unit completing access with the first magnetic radio-frequency unit receives magnetic signal information by magnetic channel, and resolve to judge whether this magnetic signal is collision detection request signal to the magnetic signal received, if the magnetic signal received is collision detection request signal, then ignore this collision detection request signal; And do not complete with the first magnetic radio-frequency unit access but other the second magnetic radio-frequency units also in its communication range also receive magnetic signal information by magnetic channel, and resolve to judge whether this magnetic signal is collision detection request signal to the magnetic signal information received, if the magnetic signal received is collision detection request signal, then reply conflict response signal to the first magnetic radio-frequency unit by magnetic channel.
Step S202: if described first magnetic radio-frequency unit does not receive the response signal of collision detection request signal, then judge that it does not exist conflict;
When described first magnetic radio-frequency unit judges that it does not exist conflict, then the first magnetic radio-frequency unit and complete between certain second magnetic radio-frequency unit that magnetic communication accesses and set up radio communication further, has continued rf data mutual.
Step S203: if described first magnetic radio-frequency unit receives the response signal of collision detection request signal, then judge have multiple second magnetic radio-frequency unit to conflict mutually.
When described first magnetic radio-frequency unit judges have multiple second magnetic radio-frequency unit to conflict mutually, then the first magnetic radio-frequency unit and completing between certain second magnetic radio-frequency unit that magnetic communication accesses disconnects, do not conclude the business with it, but periodically on magnetic channel, send collision detection request signal, and repeat above-mentioned steps and judge.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. utilize a collision detection method for magnetic two-way communication, be applied to the near field communication system comprising at least one first magnetic radio-frequency unit and at least one the second magnetic radio-frequency unit, it is characterized in that, described method comprises the steps:
First magnetic radio-frequency unit utilizes magnetic channel and a second magnetic radio-frequency unit to carry out magnetic communication access; And
First magnetic radio-frequency unit by magnetic channels transmit collision detection request signal, and receives the response signal of collision detection request signal in magnetic channel; Be specially, the the second magnetic radio-frequency unit carrying out magnetic communication access with the first magnetic radio-frequency unit receives magnetic signal by magnetic channel, and resolve to judge whether this magnetic signal is collision detection request signal to the magnetic signal received, if the magnetic signal received is collision detection request signal, then ignore this collision detection request signal; Other the second magnetic radio-frequency unit not carrying out magnetic communication access with the first magnetic radio-frequency unit receives magnetic signal by magnetic channel, and resolve to judge whether this magnetic signal is collision detection request signal to the magnetic signal received, if the magnetic signal received is collision detection request signal, then reply conflict response signal by magnetic channel;
First magnetic radio-frequency unit, according to the response signal whether receiving collision detection request signal, has judged whether that multiple second magnetic radio-frequency unit conflicts mutually.
2. method according to claim 1, is characterized in that, described first magnetic radio-frequency unit, according to the response signal whether receiving collision detection request signal, has judged whether that the afoul method of multiple second magnetic radio-frequency unit comprises the steps:
If described first magnetic radio-frequency unit does not receive the response signal of collision detection request signal, then judge that it does not exist conflict;
If described first magnetic radio-frequency unit receives the response signal of collision detection request signal, then judge have multiple second magnetic radio-frequency unit to conflict mutually.
3. method according to claim 1, it is characterized in that, if described first magnetic radio-frequency unit does not receive the response signal of collision detection request signal, when judging that it does not exist conflict, set up radio communication further between described first magnetic radio-frequency unit and the second magnetic radio-frequency unit carrying out magnetic communication access, complete rf data mutual.
4. method according to claim 1, it is characterized in that, if described first magnetic radio-frequency unit receives the response signal of collision detection request signal, when judging have multiple second magnetic radio-frequency unit to conflict mutually, disconnect between described first magnetic radio-frequency unit and the second magnetic radio-frequency unit carrying out magnetic communication access.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110260404.0A CN102982294B (en) | 2011-09-05 | 2011-09-05 | A kind of collision detection method utilizing magnetic two-way communication |
| PCT/CN2012/077204 WO2013034011A1 (en) | 2011-09-05 | 2012-06-20 | Collision detection method, magnetic radio frequency device and communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110260404.0A CN102982294B (en) | 2011-09-05 | 2011-09-05 | A kind of collision detection method utilizing magnetic two-way communication |
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| Publication Number | Publication Date |
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| CN102982294A CN102982294A (en) | 2013-03-20 |
| CN102982294B true CN102982294B (en) | 2015-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110260404.0A Active CN102982294B (en) | 2011-09-05 | 2011-09-05 | A kind of collision detection method utilizing magnetic two-way communication |
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| CN (1) | CN102982294B (en) |
| WO (1) | WO2013034011A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104424450A (en) * | 2013-08-19 | 2015-03-18 | 福建升腾资讯有限公司 | Magnetic-card decoding method based on ADC pin sampling |
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| CN1868176A (en) * | 2003-10-15 | 2006-11-22 | 皇家飞利浦电子股份有限公司 | Communication system and anti-collision method |
| CN101023434A (en) * | 2004-07-15 | 2007-08-22 | 万事达卡国际股份有限公司 | Collision detection and avoidance scheme for contactless card payment systems |
| CN101257328A (en) * | 2008-03-07 | 2008-09-03 | 薛松生 | Sensor and electric product and communication apparatus using the same |
| CN102142868A (en) * | 2010-01-29 | 2011-08-03 | 国民技术股份有限公司 | Near field communication method and system |
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| US20060214772A1 (en) * | 2005-03-24 | 2006-09-28 | Beedar Technology Inc. | Anti-Collision Scheme for Active and Passive RFID Tag System |
| KR100610358B1 (en) * | 2005-04-18 | 2006-08-09 | 삼성전자주식회사 | Rfid reader and tag and system and method for identifying tag using bit synchronize signal |
| CN100511261C (en) * | 2006-09-27 | 2009-07-08 | 中兴通讯股份有限公司 | Multiple labels data collision detection method used for radio frequency recognizing |
| KR101014795B1 (en) * | 2008-12-04 | 2011-02-16 | 인하대학교 산학협력단 | Method for preventing collision of reader, driving method of rfid reader having the method and rfid reader for performing the method |
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2011
- 2011-09-05 CN CN201110260404.0A patent/CN102982294B/en active Active
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- 2012-06-20 WO PCT/CN2012/077204 patent/WO2013034011A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1868176A (en) * | 2003-10-15 | 2006-11-22 | 皇家飞利浦电子股份有限公司 | Communication system and anti-collision method |
| CN101023434A (en) * | 2004-07-15 | 2007-08-22 | 万事达卡国际股份有限公司 | Collision detection and avoidance scheme for contactless card payment systems |
| CN101257328A (en) * | 2008-03-07 | 2008-09-03 | 薛松生 | Sensor and electric product and communication apparatus using the same |
| CN102142868A (en) * | 2010-01-29 | 2011-08-03 | 国民技术股份有限公司 | Near field communication method and system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104424450A (en) * | 2013-08-19 | 2015-03-18 | 福建升腾资讯有限公司 | Magnetic-card decoding method based on ADC pin sampling |
| CN104424450B (en) * | 2013-08-19 | 2017-05-17 | 福建升腾资讯有限公司 | Magnetic-card decoding method based on ADC pin sampling |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102982294A (en) | 2013-03-20 |
| WO2013034011A1 (en) | 2013-03-14 |
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