CN106156682B - Radio frequency identification monkey chatter suppressing method and system - Google Patents
Radio frequency identification monkey chatter suppressing method and system Download PDFInfo
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- CN106156682B CN106156682B CN201610570936.7A CN201610570936A CN106156682B CN 106156682 B CN106156682 B CN 106156682B CN 201610570936 A CN201610570936 A CN 201610570936A CN 106156682 B CN106156682 B CN 106156682B
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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
- G06K7/10316—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 using at least one antenna particularly designed for interrogating the wireless record carriers
- G06K7/10356—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 using at least one antenna particularly designed for interrogating the wireless record carriers using a plurality of antennas, e.g. configurations including means to resolve interference between the plurality of antennas
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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.
- G06K7/10079—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 spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions
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Abstract
The present invention provides a kind of radio frequency identification monkey chatter suppressing method and system, and wherein method includes the following steps: to receive the first radio-frequency antenna triggering command, opens the receiving channel of first radio-frequency antenna to receive radiofrequency signal；Monitor the radiofrequency signal RSSI value and busy channel that radio-frequency antenna leaks around first radio-frequency antenna；Judge whether the radiofrequency signal RSSI value is greater than predetermined RSSI threshold value；When the radiofrequency signal RSSI value is less than the predetermined RSSI threshold value, particular channel is distributed for first radio-frequency antenna and starts radio frequency identification；When the radiofrequency signal RSSI value is greater than the predetermined RSSI threshold value, the working method of the first radio-frequency antenna radio frequency identification is determined according to the interaction mode in the busy channel.Present invention inhibits the influences of radio frequency identification monkey chatter, ensure that the efficiency and accuracy of radio frequency identification.
Description
Technical field
The present invention relates to technical field of RFID more particularly to a kind of radio frequency identification monkey chatter suppressing method and it is
System.
Background technique
Radio Frequency Identification Technology is a kind of contactless automatic identification technology, is believed by rfid device transceiving radio frequency
Number, the related data in radio frequency recognizing electronic label is obtained, the fields such as Internet of Things are widely used in, is especially led in intelligent transportation
Domain realizes that automatic identification management has been increasingly becoming the development trend of mainstream to vehicle by Radio Frequency Identification Technology.Such as Fig. 1 institute
Show, portal frame is set in the designated position of road, rfid device and the radio frequency with number of track-lines cooperation are installed on portal frame
Antenna, each radio-frequency antenna are responsible for the radiofrequency signal transmitting-receiving in lane all the way, travel the front windshield peace of the vehicle on road
Equipped with radio frequency recognizing electronic label, it is stored with the essential information of vehicle in radio frequency recognizing electronic label, cooperates rfid device
Carry out vehicle identification.However, the lobe width of radio-frequency antenna transmitting is difficult and lane width during guaranteeing long-range identification
It is adapted, adjacent lane can be usually covered, simultaneously as the characteristic of radio-frequency antenna itself is inevitably also accompanied by secondary lobe
Generation, the problem of causing the efficiency degradation of radio frequency identification, produce monkey chatter.
The generation main cause of monkey chatter includes: the interference between 1, radio-frequency antenna, and rfid device passes through radio frequency
The secondary lobe of antenna leaks out the interference signal of certain power, and neighbouring rfid device is received by the secondary lobe of its radio-frequency antenna
To interference signal.In addition, radio-frequency antenna transmitting radiofrequency signal after the reflection of space environment, into disturbed radio frequency identification
Device influences the normal work of rfid device；2, radio frequency recognizing electronic label is influenced by multiple radio-frequency antennas, when
Radio frequency recognizing electronic label is within the scope of the lobe of the radiofrequency signal of multiple radio-frequency antennas sending, i.e. radio frequency recognizing electronic label
Overlapping region in radio-frequency receiving-transmitting, radio frequency recognizing electronic label have then been superimposed the carrier wave and life that multiple rfid devices issue
It enables, will cause situations such as radio frequency recognizing electronic label is without response, state disorder.At this point, rfid device can not receive just
The data that true radio frequency recognizing electronic label returns, rfid device then cannot to the accurate exhaustives of vehicle realization normally
Identification management.
Summary of the invention
The purpose of the present invention is to provide a kind of radio frequency identification monkey chatter suppressing method and systems, solve the prior art
Middle adjacent radio frequency identification device interferes with each other, the technical problem for causing radio frequency recognizing electronic label recognition efficiency low.
In order to solve the above-mentioned technical problem, a kind of radio frequency identification monkey chatter suppressing method of the invention, including walk as follows
It is rapid:
The first radio-frequency antenna triggering command is received, opens the receiving channel of first radio-frequency antenna to receive radio frequency letter
Number；
Monitor the radiofrequency signal RSSI(Received Signal that radio-frequency antenna leaks around first radio-frequency antenna
Strength Indication, the instruction of received signal intensity) value and busy channel；
Judge whether the radiofrequency signal RSSI value is greater than predetermined RSSI threshold value；
When the radiofrequency signal RSSI value is less than the predetermined RSSI threshold value, distributed for first radio-frequency antenna specific
Channel starts radio frequency identification；When the radiofrequency signal RSSI value is greater than the predetermined RSSI threshold value, according to the busy channel
In interaction mode determine the working method of the first radio-frequency antenna radio frequency identification.
As the further improvement of the above-mentioned radio frequency identification monkey chatter suppressing method of the present invention, the particular channel with it is described
The interval of busy channel is greater than predetermined channel interval threshold.
As the further improvement of the above-mentioned radio frequency identification monkey chatter suppressing method of the present invention, according in the busy channel
Interaction mode determine that the working method of the first radio-frequency antenna radio frequency identification specifically includes: do not supervised in the busy channel
When measuring the returned data of radio frequency recognizing electronic label, particular channel is distributed for first radio-frequency antenna and starts radio frequency identification；
When monitoring the returned data of radio frequency recognizing electronic label in the busy channel, the interaction knot in the busy channel is waited
The distribution particular channel of first radio-frequency antenna described in Shu Zaiwei starts radio frequency identification.
As the further improvement of the above-mentioned radio frequency identification monkey chatter suppressing method of the present invention, according in the busy channel
Interaction mode determine that the working method of the first radio-frequency antenna radio frequency identification specifically includes: do not supervised in the busy channel
When measuring the returned data of radio frequency recognizing electronic label, particular channel is distributed for first radio-frequency antenna and starts radio frequency identification；
The returned data of radio frequency recognizing electronic label and the returned data of radio frequency recognizing electronic label are monitored in the busy channel
When in the predetermined initial interaction stage, particular channel is distributed for first radio-frequency antenna and reduces transmission power to predetermined compatibility
Mode power starts radio frequency identification；The returned data of radio frequency recognizing electronic label is monitored in the busy channel and radio frequency is known
When the returned data of other electronic tag is more than the predetermined initial interaction stage, the interaction in the busy channel is waited to terminate to be again institute
It states the first radio-frequency antenna distribution particular channel and starts radio frequency identification.
As the further improvement of the above-mentioned radio frequency identification monkey chatter suppressing method of the present invention, first radio frequency is being opened
Before the receiving channel of antenna is to receive radiofrequency signal, whether the method also includes: inquiry first radio-frequency antennas can be with
The radio-frequency antenna of adjacent lane triggers simultaneously, and straight for first radio-frequency antenna distribution particular channel when that can not trigger simultaneously
Connect beginning radio frequency identification.
In order to solve the above-mentioned technical problem, a kind of radio frequency identification monkey chatter of the invention inhibits system, comprising:
Initial cell opens the receiving channel of first radio-frequency antenna for receiving the first radio-frequency antenna triggering command
To receive radiofrequency signal；
Monitoring unit, for monitoring the radiofrequency signal RSSI value and account for that radio-frequency antenna leaks around first radio-frequency antenna
Use channel；
Judging unit, for judging whether the radiofrequency signal RSSI value is greater than predetermined RSSI threshold value；
Execution unit, for being penetrated for described first when the radiofrequency signal RSSI value is less than the predetermined RSSI threshold value
Frequency antenna assignment particular channel starts radio frequency identification；When the radiofrequency signal RSSI value is greater than the predetermined RSSI threshold value, root
The working method of the first radio-frequency antenna radio frequency identification is determined according to the interaction mode in the busy channel.
Inhibit the further improvement of system as the above-mentioned radio frequency identification monkey chatter of the present invention, the particular channel with it is described
The interval of busy channel is greater than predetermined channel interval threshold.
Inhibit the further improvement of system, basis in the execution unit as the above-mentioned radio frequency identification monkey chatter of the present invention
Interaction mode in the busy channel determines that the working method of the first radio-frequency antenna radio frequency identification specifically includes: described
When not monitoring the returned data of radio frequency recognizing electronic label in busy channel, particular channel is distributed for first radio-frequency antenna
Start radio frequency identification；When monitoring the returned data of radio frequency recognizing electronic label in the busy channel, the occupancy is waited
Interaction in channel terminates to start radio frequency identification again for first radio-frequency antenna distribution particular channel.
Inhibit the further improvement of system, basis in the execution unit as the above-mentioned radio frequency identification monkey chatter of the present invention
Interaction mode in the busy channel determines that the working method of the first radio-frequency antenna radio frequency identification specifically includes: described
When not monitoring the returned data of radio frequency recognizing electronic label in busy channel, particular channel is distributed for first radio-frequency antenna
Start radio frequency identification；The returned data of radio frequency recognizing electronic label and frequency identification electronic mark are monitored in the busy channel
When the returned data of label is in the predetermined initial interaction stage, particular channel is distributed for first radio-frequency antenna and reduces transmitting function
Rate to predetermined compatibility mode power starts radio frequency identification；The return of radio frequency recognizing electronic label is monitored in the busy channel
When data and the returned data of radio frequency recognizing electronic label are more than the predetermined initially interaction stage, the friendship in the busy channel is waited
Mutually terminate to start radio frequency identification again for first radio-frequency antenna distribution particular channel.
Inhibit the further improvement of system as the above-mentioned radio frequency identification monkey chatter of the present invention, the system also includes inquiries
Unit, for inquiring first radio frequency before the receiving channel for opening first radio-frequency antenna is to receive radiofrequency signal
Whether antenna can trigger simultaneously with the radio-frequency antenna of adjacent lane, and be first radio-frequency antenna point when that can not trigger simultaneously
Directly start radio frequency identification with particular channel.
Compared with prior art, the present invention analyzes adjacent radio frequency identification device by way of monitoring leakage equivalent power
Working condition does not need additional wiring between rfid device and rfid device, reduce the difficulty of engineering construction
And cost, coordinate to cooperate with each other between each rfid device according to the working condition of adjacent radio frequency identification device,
Guarantee to avoid monkey chatter in the case where radio frequency identification efficiency, improves the accuracy of radio frequency identification.Present invention inhibits penetrate
Frequency identifies the influence of monkey chatter, ensure that the efficiency and accuracy of radio frequency identification.
After the detailed description of embodiment of the present invention is read in conjunction with the figure, the other features and advantages of the invention will become more
Add clear.
Detailed description of the invention
In order to illustrate more clearly of embodiment of the present invention or the technical solution of the prior art, below will to embodiment or
Attached drawing needed to be used in the description of the prior art is briefly described, it is therefore apparent that the accompanying drawings in the following description is only this
The some embodiments recorded in invention, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is radio frequency identification monkey chatter schematic diagram.
Fig. 2 is radio frequency identification monkey chatter suppressing method flow chart in an embodiment of the present invention.
Fig. 3 is radio frequency identification schematic diagram in an embodiment of the present invention.
Fig. 4 is radio frequency identification schematic diagram in an embodiment of the present invention.
Fig. 5 is radio frequency identification schematic diagram in an embodiment of the present invention.
Fig. 6 is that radiofrequency signal RSSI value flow chart is monitored in an embodiment of the present invention.
Fig. 7 is adjacent lane while radio frequency identification working method flow chart in an embodiment of the present invention.
Fig. 8 is that radio frequency identification monkey chatter inhibits system schematic in an embodiment of the present invention.
Specific embodiment
Hereinafter, the present invention will be described in detail with reference to various embodiments shown in the accompanying drawings.But these embodiments are not
The limitation present invention, structure that those skilled in the art are made according to these embodiments, method or change functionally
It changes and is included within the scope of protection of the present invention.
Radio Frequency Identification Technology is a kind of contactless automatic identification technology, and rfid device is by radiofrequency signal to penetrating
Related data in frequency identification electronic tag is written and read.Vehicle identification management in, by Radio Frequency Identification Technology to vehicle into
The long-range identification management of row, preferably uses passive ultra-high frequency Radio Frequency Identification Technology, working frequency can be 840MHz-845MHz
Or 920MHz-925MHz.The vehicle electron identifying standard dominated with the Ministry of Public Security drafts formulation iterative method, is applied to vehicle
Management radio frequency identification, in more embodiments, using the relevant air interface met in vehicle electron identifying standard
Agreement etc..
It should be noted that in various embodiments, identical label or label may be used, but these not generations
Table structure or absolute connection relationship functionally.Also, " first ", " second ", " third " being previously mentioned in each embodiment
Not representative structure or absolute differentiation relationship functionally, these are merely for convenience of description.
As shown in Fig. 2, radio frequency identification monkey chatter suppressing method flow chart in an embodiment of the present invention.A kind of radio frequency knowledge
Other monkey chatter suppressing method includes step S1, step S2, step S3, step S4, and above-mentioned steps are in radio-frequency antenna and radio frequency day
During alternately switching between line, carry out to periodic cycle.Rfid device is by sending the to specified radio-frequency antenna
One radio-frequency antenna triggering command, which is realized, alternately to be switched, and specified radio-frequency antenna is started to work as the first radio-frequency antenna.More
In embodiment, when rfid device control connects one and only one radio-frequency antenna, then do not need alternately to switch, it is only necessary to
Sending the first radio-frequency antenna triggering command to the radio-frequency antenna notifies the radio-frequency antenna to start to work.Rfid device is each
It needs the work such as to complete initialization first and be locally configured when booting.
In step sl, receive the first radio-frequency antenna triggering command, open the receiving channel of first radio-frequency antenna with
Receive radiofrequency signal.On the road of vehicle identification, corresponding each lane is both provided with radio-frequency antenna, the radio frequency day in each lane
Line is responsible for the identification of a lane vehicle, and rfid device and radio-frequency antenna are cooperatively connected, and rfid device passes through radio frequency
The radiofrequency signal lobe of antenna transceiving radio frequency signal, the transmitting of each radio-frequency antenna is covered within the scope of corresponding lane, usually
In the case of, in order to guarantee that radio frequency recognizing electronic label can be identified to more at a distance, improve radio frequency recognizing electronic label
Identify sensitivity, lobe can correspondingly can may also be covered on adjacent lane by expansion appropriate.As shown in figure 3, in this reality
Tetra- tunnel mode Zhong Wei and runway are applied, including the first rfid device 110, the second rfid device 210, radio frequency day
Line 111, radio-frequency antenna 112, radio-frequency antenna 213, radio-frequency antenna 214, the first rfid device 110 control connection radio-frequency antenna
111, radio-frequency antenna 112, the second rfid device 210 control connection radio-frequency antenna 213, radio-frequency antenna 214.Specific real
It applies in mode, the radio-frequency antenna being connected on same rfid device is worked by the way of time-division repeating query, such as radio frequency day
Only one radio-frequency antenna is working simultaneously in line 111 and radio-frequency antenna 112.They are by periodic receipt triggering command come real
It now works alternatively, such as radio-frequency antenna 111 receives the first radio-frequency antenna triggering command as the first radio-frequency antenna, indicates first
Rfid device 110 is switched to radio-frequency antenna 111 and works, and can emit within the scheduled time cycle to specific lane
Radiofrequency signal.The lobe size of radiofrequency signal can be adjusted by transmission power, and transmission power is bigger, the area of lobe covering
Domain is also bigger.As shown in figure 3, the transmission power of radio-frequency antenna 213 is larger, therefore compared with the radio frequency identification electricity on remote vehicle
Subtab can also be identified to, and the transmission power of radio-frequency antenna 111 is smaller, therefore the distance of radio frequency identification has certain limit
System, but the width of lobe also narrows, and can't cover the region of adjacent lane.
Because of the consistency of radio frequency recognizing electronic label installation site on automobile, the especially rule of vehicle electron identifying standard
Fixed, radio frequency recognizing electronic label is all mounted on the front windshield of automobile, and the direction of illumination of radio-frequency antenna is consistent, base
Be not on this any two rfid device mutually to penetrating the case where, so present embodiment only need to analyze it is same disconnected
Interfering with each other for radio-frequency antenna can between the adjacent lane of face.As described above, the transmitting of the radio-frequency antenna when adjacent lane
When power is all normal big, generating lobe overlapped can cause monkey chatter, and adjacent lane refers to being located next to herein
Two lanes, if the radio-frequency antenna of adjacent lane emits signal simultaneously and will necessarily reduce the identification effect of radio frequency recognizing electronic label
Rate.By taking Fig. 3 as an example, the corresponding first lane of radio-frequency antenna 111 respectively with the corresponding second lane of radio-frequency antenna 112, radio frequency day
The corresponding third lane of line 213 is adjacent lane, however second lane and third lane are not adjacent lane, according to theoretical calculation
And practical engineering experience is combined to find, the radio-frequency antenna of first lane and third lane holds very much because of the reason of radio-frequency antenna 111
It is also easy to produce influence, and is limited by the reasons such as the mounting height of radio-frequency antenna, the directionality of radio-frequency antenna and Sidelobe Suppression, the second vehicle
It there is no influence between road and the radio-frequency antenna of third lane, can be ignored, because two lanes are apart from each other, penetrate
The radiofrequency signal that frequency antenna 112 and radio-frequency antenna 213 emit will not influence each other, i.e., radio-frequency antenna 112 does not interfere with third
Radio frequency recognizing electronic label on lane, radio-frequency antenna 213 do not interfere with the radio frequency recognizing electronic label on second lane.
Therefore, when reception triggering command is switched to this specified lane radio-frequency antenna, it is necessary to assure adjacent lane
Radio-frequency antenna not in the case where emitting radiofrequency signal, then emit the radiofrequency signal of this lane radio-frequency antenna, just may be used in this way
To guarantee that monkey chatter will not be generated, in the present embodiment, after receiving the first radio-frequency antenna triggering command, it is logical to close transmitting
Road, opens the receiving channel of the first radio-frequency antenna only to receive radiofrequency signal, main purpose be exactly influence in order to prevent it is adjacent
The transmitting-receiving of the radiofrequency signal in lane.
In a preferred embodiment, it as shown in figure 4, on the parallel road of six-lane, is filled using two radio frequency identifications
It sets and is separately connected three radio-frequency antennas, be the first rfid device 120 control connection radio-frequency antenna 124, radio-frequency antenna respectively
125, radio-frequency antenna 126, the second rfid device 220 control connection radio-frequency antenna 221, radio-frequency antenna 222, radio-frequency antenna
223, the radio-frequency antenna while only one radio frequency day that are connected to same rfid device on similar with above embodiment
Line is working, and radio-frequency antenna alternates switching by receiving the first radio-frequency antenna triggering command.It is first with radio-frequency antenna 125
For radio-frequency antenna, whether when receiving the first radio-frequency antenna triggering command, can inquire radio-frequency antenna 125 can be with adjacent vehicle
The radio-frequency antenna in road triggers simultaneously, because radio-frequency antenna 125 adjacent lane, two radio-frequency antennas are radio-frequency antenna 126 respectively, penetrate
Frequency antenna 124, and radio-frequency antenna 126, radio-frequency antenna 124 and radio-frequency antenna 125 are all to be connected to the first rfid device 120
On, so can not trigger simultaneously, also there is no need to worry that radio-frequency antenna 125 emits radiofrequency signal when influence whether adjacent lane
Radio frequency recognizing electronic label, it is preferable that directly distribute particular channel for radio-frequency antenna 125 and directly start radio frequency identification, that is, emit
Radiofrequency signal is interacted with the vehicle on corresponding lane.By taking radio-frequency antenna 221 is the first radio-frequency antenna as an example, because of radio frequency day
The radio-frequency antenna of 221 adjacent lane of line includes radio-frequency antenna 124, radio-frequency antenna 222, and radio-frequency antenna 222 can not be with radio-frequency antenna
221 triggerings simultaneously are so without the concern for and radio-frequency antenna 221 and radio-frequency antenna 124 are to belong to different radio frequency identification dresses
It sets, therefore two radio-frequency antennas are possible to occur simultaneously the case where working.The corresponding lane of radio-frequency antenna 221 and radio frequency day
The corresponding lane of line 124 can be referred to as sensitive lane, because they have two conditions: 1) two lanes are adjacent, 2) two
The corresponding radio-frequency antenna in lane belongs to different rfid devices.So radio-frequency antenna 221 is receiving triggering command
When, it just must first know the working condition of radio-frequency antenna 124.In the present embodiment, when radio-frequency antenna is in non-sensitive vehicle
When road, receives triggering command and just directly start radio frequency identification, skip step S2, step S3, step S4；When radio-frequency antenna is in
Receiving channel is only opened after receiving triggering command in sensitive lane, then executes according to step S2, step S3, step S4.It needs
It is noted that be not excluded for particularly being arranged under conditions of not meeting above-mentioned sensitive lane in more embodiments,
The radio-frequency antenna of two adjacent lanes can also work at the same time, it is preferable that the inquiry mode of use can be by pre-stored each
The inquiry table of a radio-frequency antenna situation realizes inquiry, knows whether two radio-frequency antennas of adjacent lane can trigger simultaneously, then
It is carried out according still further to above-mentioned process.
In step s 2, the radiofrequency signal RSSI value and occupancy of radio-frequency antenna leakage around first radio-frequency antenna are monitored
Channel.How to judge the radio-frequency antenna of adjacent lane either with or without working, in the present embodiment, using monitoring RSSI value, such as
Upper described, the self-characteristic of radio-frequency antenna can leak certain radiofrequency signal by secondary lobe.Therefore, the first radio-frequency antenna receives
To after trigger signal, the transmitting situation of receiving channel monitoring surrounding radio-frequency antenna is first opened, including radio-frequency antenna around
The channel for which specific frequency point that radiofrequency signal RSSI value and radiofrequency signal occupy, by taking 920MHz-925MHz as an example, occupied bandwidth
For 250kHz, available frequency is counted 16, by monitoring it is known that specific working frequency is how many, is distributing specific letter in this way
The busy channel of these frequency points can be avoided when road.The distribution of radio-frequency antenna channel can realize by way of frequency hopping, but
Frequency point is fixed in one recognition cycle, therefore the channel that the surrounding's radio-frequency antenna monitored occupies is in period regular hour
Inside it is no variation in.As shown in fig. 6, in the step s 21, be monitored by the channel of the specific frequency point of fast frequency-hopped determination,
In step S22, judge whether the channel of specific frequency point is occupied, if it is not, it is fast frequency-hopped to next to continue to be transferred to step S21
A frequency point carries out channel monitoring, if entering step S23, stationary phase answers frequency point channel, in step s 24, monitors busy channel
Radiofrequency signal RSSI value.
In more embodiments, as shown in figure 5, including three rfid devices on the parallel road of six-lane
With corresponding six radio-frequency antennas, the first rfid device 130, which controls, connects radio-frequency antenna 131, radio-frequency antenna 132, and second
The control connection of rfid device 230 radio-frequency antenna 233, radio-frequency antenna 234, the control connection of third rfid device 330 are penetrated
Frequency antenna 335, radio-frequency antenna 336.By taking radio-frequency antenna 132 is the first radio-frequency antenna as an example, the triggering of the first radio-frequency antenna is received
Instruction opens receiving channel and monitors surrounding radio-frequency antenna busy channel situation, and radio-frequency antenna 233, radio-frequency antenna 336 all exist at this time
Emit radiofrequency signal, in order to monitor the channel of all occupancy, after the monitoring that step S23 completes a busy channel, after
It is continuous to be recycled to step S21, and so on, until all frequency points as defined in agreement stop monitoring after the completion of being all traversed, into step
Rapid S3.Preferably, count value is set, is decided whether to stop monitoring, such as the most only two-way radio frequency days of surrounding according to count value
Line is in transmitting signal, when later the radiofrequency signal RSSI value for monitoring two busy channels just stops monitoring.
In step s3, judge whether the radiofrequency signal RSSI value is greater than predetermined RSSI threshold value.By by above-mentioned steps
The radiofrequency signal RSSI value monitored is compared with predetermined RSSI threshold value, can determine which radio frequency day is radiofrequency signal be from
What line leaked out.Because multiple radio-frequency antennas are to be arranged on the same section, and radiofrequency signal RSSI value indicates radio frequency day
The equivalent power of line leakage is monitored that radiofrequency signal RSSI value is smaller and is meant that the radio frequency day due to the loss of Distance Transmission
Line is remoter with a distance from the first radio-frequency antenna.Predetermined RSSI threshold value is by theoretical calculation and engineering practice preset one
A value, when radiofrequency signal RSSI value be greater than predetermined RSSI threshold value, illustrate leakage radiofrequency signal be from the radio frequency day of adjacent lane
What line emitted.
It in step s 4, is first radio frequency when the radiofrequency signal RSSI value is less than the predetermined RSSI threshold value
Antenna assignment particular channel starts radio frequency identification；When the radiofrequency signal RSSI value is greater than the predetermined RSSI threshold value, according to
Interaction mode in the busy channel determines the working method of the first radio-frequency antenna radio frequency identification.As radiofrequency signal RSSI
When value is less than predetermined RSSI threshold value, illustrate all no transmitting radiofrequency signal of the radio-frequency antenna of the first radio-frequency antenna adjacent lane, this
When the first radio-frequency antenna transmitting radiofrequency signal the possibility for interfering with other radio-frequency antennas is just not present, so be the first radio-frequency antenna
Distribution particular channel starts radio frequency identification.And when radiofrequency signal RSSI value is greater than predetermined RSSI threshold value, illustrate the first radio frequency day
Line adjacent lane has radio-frequency antenna that certainly will influence whether in transmitting signal if the first radio-frequency antenna directly emits radiofrequency signal
The radio frequency identification of the radio frequency recognizing electronic label of adjacent lane.It should determine that first penetrates according to the interaction mode in busy channel at this time
The working method of frequency antenna rf identification.By taking Fig. 5 as an example, radio-frequency antenna 132 monitors that two channels are occupied, because of radio frequency day
Line 233 and radio-frequency antenna 336 may determine which is radio-frequency antenna according to radiofrequency signal RSSI value all in transmitting radiofrequency signal
233 sendings, which is that radio-frequency antenna 336 issues, because the corresponding lane of radio-frequency antenna 336 is right from radio-frequency antenna 132
The lane answered is separated by three lanes, so the radiofrequency signal RSSI value received is less than predetermined RSSI threshold value, once monitoring is not
The radiofrequency signal of the radio-frequency antenna leakage of adjacent lane, so that it may not have to consider whether radio-frequency antenna 132 generates interference to it.And
The radiofrequency signal RSSI value that radio-frequency antenna 233 leaks is greater than predetermined RSSI threshold value, determines that the radio-frequency antenna of adjacent lane is being sent out
Radiofrequency signal is penetrated, so radio-frequency antenna 132 cannot directly carry out radio frequency identification work.It should be noted that same section is multiple
Radio-frequency antenna at work, as long as soon as have a busy channel radiofrequency signal RSSI value be greater than predetermined RSSI threshold value, say
The radio-frequency antenna of bright adjacent lane is working, so just having to carry out in step S4 according to the interaction mode in the busy channel
Determine the working method of the first radio-frequency antenna radio frequency identification.
In a particular embodiment, when the radiofrequency signal RSSI value monitored is greater than predetermined RSSI threshold value, such as Fig. 7 institute
Show, implementation steps S41, continues to monitor the interaction mode in busy channel, the interaction mode in busy channel refers to radio frequency identification
The reiving/transmitting state of the radiofrequency signal carried out between device and radio frequency recognizing electronic label, for the initial of mutual radio communication
Change, certification and data are transmitted.Known in order to ensure the safety of data interaction in radio frequency according to radio frequency identification air interface protocol
Other device identifies the interaction for having a series of order and response before radio frequency recognizing electronic label data between the two, radio frequency
Identification electronic tag can be responded according to rfid device by the series of orders that radio-frequency antenna issues, and convert itself
State.This interactive process can be detected by monitoring busy channel, to judge whether the first radio-frequency antenna can send life
It enables.
In step S42, judge whether busy channel has the returned data of radio frequency recognizing electronic label, in busy channel
When not monitoring the returned data of radio frequency recognizing electronic label, illustrate that the data of radio frequency recognizing electronic label have interacted completion,
Therefore particular channel is distributed for the first radio-frequency antenna and start radio frequency identification, the radio frequency identification of adjacent lane will not be generated at this time dry
It disturbs；When monitoring the returned data of radio frequency recognizing electronic label in the busy channel, illustrate the radio-frequency antenna of adjacent lane
It also is used to carry out radio frequency identification to radio frequency recognizing electronic label in transmitting radiofrequency signal, the first radio-frequency antenna emits letter immediately at this time
It number may influence whether the radio frequency identification of adjacent lane, so entering step S43, parse interaction mode, wait busy channel
In interaction terminate again for the first radio-frequency antenna distribute particular channel start radio frequency identification.
Preferably, in step S44, judge whether to close to an end, i.e. setting one predetermined initial interaction stage, at interaction
Illustrate interaction just in the predetermined initial interaction stage, it is also necessary to which the long period could terminate, and interaction alreadys exceed predetermined initial
The interaction stage illustrates that interaction closes to an end.Make a reservation for the initial interaction stage according to the rule of specific radio frequency identification air interface protocol
Fixed, reasonably setting makes a reservation for the node in initial interaction stage.
Interaction mode in busy channel closes to an end, that is, has been more than the predetermined initial interaction stage, has entered step S451,
Monitoring interaction terminates, that is, waits until that the interaction in busy channel terminates, enter step S46, distributes specific letter for the first radio-frequency antenna
Road enters step S47, starts radio frequency identification.
Interaction mode in busy channel closes to an end not yet, i.e., at the returned data of radio frequency recognizing electronic label
In the predetermined initial interaction stage, S452 is entered step, reduces the transmission power of the first radio-frequency antenna to predetermined compatibility mode power,
As in Figure 3-5, by taking the radio-frequency antenna 111 in Fig. 3 as an example, the radio-frequency antenna 213 of the adjacent lane of radio-frequency antenna 111 is emitting
Radiofrequency signal, by the judgement of step S44, interaction reduces hair also in the predetermined initial interaction stage for radio-frequency antenna 111
Power is penetrated, the radiofrequency signal coverage area that radio-frequency antenna 111 emits at this time becomes smaller, the radio frequency that will not emit with radio-frequency antenna 213
Signal cover generates overlapping, and radio signal transmission may be implemented extremely by reduction transmission power can produce apart from farther away place
Raw biggish decaying, so that local radio frequency recognizing electronic label incudes less than the radiofrequency signal being emitted to farther out.Such as Fig. 3 institute
Show, the radiofrequency signal that radio-frequency antenna 111 emits just has decayed to the corresponding lane of radio-frequency antenna 213 down to the trigger gate of label
It limits.Wherein, predetermined compatibility mode power refers to that the first radio-frequency antenna emits radio frequency in the radio-frequency antenna with adjacent lane simultaneously
When signal, the preset value for reducing the first radio-frequency antenna power reduces the transmission power of radio-frequency antenna 111 in Fig. 3,
It is can to guarantee that two adjacent lane radio-frequency antennas do not influence each other according to theoretical calculation and engineering practice verifying setting one
Performance number, compatibility mode is that two adjacent lane radio-frequency antennas are compatible while radio frequency identification, while also ensuring and penetrating
Effective overlay area of frequency signal, reduces the probability of skip.It is the by reducing the processing of power subsequently into step S46
One radio-frequency antenna distributes particular channel, is that radio-frequency antenna 111 distributes particular channel in Fig. 3.You need to add is that in this reality
Applying step S452 and step S46 in mode is a series of movement, can overturn sequence or carry out simultaneously.In step S47
In, the first radio-frequency antenna starts radio frequency identification.
It should be noted that the particular channel of above-mentioned meaning refers to the available channel of frequency point other than busy channel, in order to protect
It demonstrate,proves between channel and channel mutually without interruption, is the particular channel and occupancy of the distribution of the first radio-frequency antenna by way of frequency hopping
The interval of channel is greater than predetermined channel interval threshold, and predetermined channel interval threshold is set in advance according to theoretical calculation and engineering practice
A fixed value guarantees that the frequency point of channel and channel has reasonable interval.
As shown in figure 8, radio frequency identification monkey chatter inhibits system schematic in an embodiment of the present invention.Radio frequency identification is adjacent
Road Interference Suppression System includes initial cell 81, monitoring unit 82, judging unit 83, execution unit 84.
Initial cell 81 opens the receiving channel of first radio-frequency antenna for receiving the first radio-frequency antenna triggering command
To receive radiofrequency signal.Wherein, when the radio-frequency antenna of the first radio-frequency antenna adjacent lane will not be opened simultaneously with the first radio-frequency antenna
Begin identification when, such as the first radio-frequency antenna corresponds to the left-lane and the corresponding radio-frequency antenna of right lane and the first radio-frequency antenna in lane
The same rfid device is connected, rfid device is by the way of more radio-frequency antenna repeating queries, then It is not necessary to judge week
Enclose the radiofrequency signal RSSI value of radio-frequency antenna leakage.For simple flow, the efficiency of raising radio frequency identification, radio frequency identification neighboring trace is dry
Disturbing inhibition system further includes query unit, for the receiving channel for opening first radio-frequency antenna with receive radiofrequency signal it
Before, inquire whether first radio-frequency antenna can trigger simultaneously with the radio-frequency antenna of adjacent lane, and when that can not trigger simultaneously
Particular channel, which is distributed, for first radio-frequency antenna directly starts radio frequency identification.
Monitoring unit 82 be used to monitor the radiofrequency signal RSSI value that radio-frequency antenna around first radio-frequency antenna leaks and
Busy channel.Judging unit 83 is for judging whether the radiofrequency signal RSSI value is greater than predetermined RSSI threshold value.
Execution unit 84 is used to penetrate when the radiofrequency signal RSSI value is less than the predetermined RSSI threshold value for described first
Frequency antenna assignment particular channel starts radio frequency identification；When the radiofrequency signal RSSI value is greater than the predetermined RSSI threshold value, root
The working method of the first radio-frequency antenna radio frequency identification is determined according to the interaction mode in the busy channel.Wherein, specific letter
The interval of road and busy channel is greater than predetermined channel interval threshold, in order to guarantee between rfid device and rfid device
Because being interfered with each other caused by channel is too close.
Preferably, determine that first radio-frequency antenna is penetrated according to the interaction mode in the busy channel in execution unit 84
The working method of frequency identification specifically includes: not monitoring the returned data of radio frequency recognizing electronic label in the busy channel
When, particular channel, which is distributed, for first radio-frequency antenna starts radio frequency identification；Radio frequency identification is monitored in the busy channel
When the returned data of electronic tag, the interaction in the busy channel is waited to terminate again specific for first radio-frequency antenna distribution
Channel starts radio frequency identification.It monitors specifically also to wrap when the returned data of radio frequency recognizing electronic label in the busy channel
It includes: being in the predetermined initial interaction stage in the returned data of radio frequency recognizing electronic label, it is special for first radio-frequency antenna distribution
Determine channel and reduce transmission power to predetermined compatibility mode power to start radio frequency identification.Related embodiment is referred to radio frequency knowledge
The specific embodiment of other monkey chatter suppressing method.
In conjunction with method and technology scheme disclosed in the present application, hardware can be embodied directly in, by the soft of control unit execution
Part module or both combination, i.e. one or more steps and/or one or more steps combination, both can correspond to computer journey
Each software module of sequence process can also correspond to each hardware module, such as ASIC(Application Specific
Integrated Circuit, specific integrated circuit), FPGA(Field-Programmable Gate Array, scene can compile
Journey gate array) or other programmable logic device, discrete gate or transistor logic, discrete hardware components or it is any suitable
Work as combination.For convenience of description, it is divided into various modules when description above-mentioned apparatus with function to describe respectively, certainly, is implementing this
The function of each module can be realized in the same or multiple software and or hardware when application.
As seen through the above description of the embodiments, those skilled in the art can be understood that the application can
It realizes by means of software and necessary general hardware platform.Based on this understanding, the technical solution essence of the application
On in other words the part that contributes to existing technology can be embodied in the form of software products.The software is by microcontroller list
Member executes, and depends on required configuration, may include any kind of one or more micro-control units, including but not limited to
Micro-control unit, microcontroller, DSP(Digital Signal Processor, Digital Signals unit) or its any group
It closes.The software is stored in memory, for example, volatile memory (such as random-access memory etc.), nonvolatile memory
(for example, read-only memory, flash memory etc.) or any combination thereof.
In conclusion the present invention analyzes the work shape of adjacent radio frequency identification device by way of monitoring leakage equivalent power
State does not need additional wiring between rfid device and rfid device, reduce the difficulty and cost of engineering construction,
Coordinate to cooperate with each other between each rfid device according to the working condition of adjacent radio frequency identification device, is guaranteeing radio frequency
Monkey chatter is avoided in the case where recognition efficiency, improves the accuracy of radio frequency identification.Present invention inhibits radio frequency identification neighbours
The influence of road interference, ensure that the efficiency and accuracy of radio frequency identification.
It should be appreciated that although this specification is described in terms of embodiments, but not each embodiment only includes one
A independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should will say
As a whole, the technical solution in each embodiment may also be suitably combined to form those skilled in the art can for bright book
With the other embodiments of understanding.
The series of detailed descriptions listed above only for feasible embodiment of the invention specifically
Protection scope bright, that they are not intended to limit the invention, it is all without departing from equivalent implementations made by technical spirit of the present invention
Or change should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of radio frequency identification monkey chatter suppressing method, which comprises the steps of:
The first radio-frequency antenna triggering command is received, opens the receiving channel of first radio-frequency antenna to receive radiofrequency signal；
Monitor the radiofrequency signal RSSI value and busy channel that radio-frequency antenna leaks around first radio-frequency antenna；
Judge whether the radiofrequency signal RSSI value is greater than predetermined RSSI threshold value；
When the radiofrequency signal RSSI value is less than the predetermined RSSI threshold value, particular channel is distributed for first radio-frequency antenna
Start radio frequency identification；When the radiofrequency signal RSSI value is greater than the predetermined RSSI threshold value, according in the busy channel
Interaction mode determines the working method of the first radio-frequency antenna radio frequency identification.
2. radio frequency identification monkey chatter suppressing method according to claim 1, which is characterized in that the particular channel and institute
The interval for stating busy channel is greater than predetermined channel interval threshold.
3. radio frequency identification monkey chatter suppressing method according to claim 1, which is characterized in that according to the busy channel
In interaction mode determine that the working method of the first radio-frequency antenna radio frequency identification specifically includes: in the busy channel not
When monitoring the returned data of radio frequency recognizing electronic label, particular channel is distributed for first radio-frequency antenna and starts radio frequency knowledge
Not；When monitoring the returned data of radio frequency recognizing electronic label in the busy channel, the friendship in the busy channel is waited
Mutually terminate to start radio frequency identification again for first radio-frequency antenna distribution particular channel.
4. radio frequency identification monkey chatter suppressing method according to claim 1, which is characterized in that according to the busy channel
In interaction mode determine that the working method of the first radio-frequency antenna radio frequency identification specifically includes: in the busy channel not
When monitoring the returned data of radio frequency recognizing electronic label, particular channel is distributed for first radio-frequency antenna and starts radio frequency knowledge
Not；The return number of the returned data of radio frequency recognizing electronic label and radio frequency recognizing electronic label is monitored in the busy channel
When according in the predetermined initial interaction stage, particular channel is distributed for first radio-frequency antenna and to reduce transmission power simultaneous to making a reservation for
Hold mode power and starts radio frequency identification；The returned data and radio frequency of radio frequency recognizing electronic label are monitored in the busy channel
When identifying that the returned data of electronic tag is more than the predetermined initial interaction stage, wait the interaction in the busy channel terminate be again
The first radio-frequency antenna distribution particular channel starts radio frequency identification.
5. radio frequency identification monkey chatter suppressing method according to claim 1, which is characterized in that penetrated opening described first
Before the receiving channel of frequency antenna is to receive radiofrequency signal, the method also includes: whether inquiry first radio-frequency antenna may be used
It is triggered simultaneously with the radio-frequency antenna of adjacent lane, and distributes particular channel when that can not trigger simultaneously for first radio-frequency antenna
Directly start radio frequency identification.
6. a kind of radio frequency identification monkey chatter inhibits system characterized by comprising
Initial cell opens the receiving channel of first radio-frequency antenna for receiving the first radio-frequency antenna triggering command to connect
Receive radiofrequency signal；
Monitoring unit, for monitoring the radiofrequency signal RSSI value and occupy letter that radio-frequency antenna leaks around first radio-frequency antenna
Road；
Judging unit, for judging whether the radiofrequency signal RSSI value is greater than predetermined RSSI threshold value；
Execution unit, for being first radio frequency day when the radiofrequency signal RSSI value is less than the predetermined RSSI threshold value
Line distribution particular channel starts radio frequency identification；When the radiofrequency signal RSSI value is greater than the predetermined RSSI threshold value, according to institute
State the working method that the interaction mode in busy channel determines the first radio-frequency antenna radio frequency identification.
7. radio frequency identification monkey chatter according to claim 6 inhibits system, which is characterized in that the particular channel and institute
The interval for stating busy channel is greater than predetermined channel interval threshold.
8. radio frequency identification monkey chatter according to claim 6 inhibits system, which is characterized in that root in the execution unit
Determine that the working method of the first radio-frequency antenna radio frequency identification specifically includes according to the interaction mode in the busy channel: in institute
When stating the returned data for not monitoring radio frequency recognizing electronic label in busy channel, specific letter is distributed for first radio-frequency antenna
Road starts radio frequency identification；When monitoring the returned data of radio frequency recognizing electronic label in the busy channel, accounted for described in waiting
Terminated to start radio frequency identification again for first radio-frequency antenna distribution particular channel with the interaction in channel.
9. radio frequency identification monkey chatter according to claim 6 inhibits system, which is characterized in that root in the execution unit
Determine that the working method of the first radio-frequency antenna radio frequency identification specifically includes according to the interaction mode in the busy channel: in institute
When stating the returned data for not monitoring radio frequency recognizing electronic label in busy channel, specific letter is distributed for first radio-frequency antenna
Road starts radio frequency identification；The returned data and frequency identification electronic of radio frequency recognizing electronic label are monitored in the busy channel
When the returned data of label is in the predetermined initial interaction stage, particular channel is distributed for first radio-frequency antenna and reduces transmitting
Power to predetermined compatibility mode power starts radio frequency identification；Returning for radio frequency recognizing electronic label is monitored in the busy channel
The returned data for returning data and radio frequency recognizing electronic label is more than when making a reservation for the initial interaction stage, to wait in the busy channel
Interaction terminates to start radio frequency identification again for first radio-frequency antenna distribution particular channel.
10. radio frequency identification monkey chatter according to claim 6 inhibits system, which is characterized in that the system also includes
Query unit, for inquiring described first before the receiving channel for opening first radio-frequency antenna is to receive radiofrequency signal
Whether radio-frequency antenna can trigger simultaneously with the radio-frequency antenna of adjacent lane, and be first radio frequency day when that can not trigger simultaneously
Line distribution particular channel directly starts radio frequency identification.
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| CN106778420B (en) * | 2016-12-22 | 2020-11-03 | 江苏本能科技有限公司 | Multi-channel radio frequency identification device linkage method and system |
| CN106874815A (en) * | 2017-02-10 | 2017-06-20 | 天津中兴智联科技有限公司 | A kind of implementation method that many reader monkey chatters are detected based on RSSI |
| CN107733472B (en) * | 2017-10-26 | 2021-07-23 | 江苏本能科技有限公司 | Radio frequency identification frequency point self-adaptive setting method and system and control device |
| US20190387410A1 (en) * | 2018-06-13 | 2019-12-19 | GM Global Technology Operations LLC | Sensor interference mitigation using geo-location based transmission resource allocation for vehicle sensors |
| CN109800829B (en) * | 2018-12-04 | 2022-02-18 | 北京千方科技股份有限公司 | Signal time-sharing sending method, device and system for vehicle identification |
| CN111398678B (en) * | 2020-04-22 | 2022-04-05 | 航天恒星科技有限公司 | Method and device for testing carrier crosstalk inhibition index of satellite-borne phased-array antenna |
| CN112261687A (en) * | 2020-10-22 | 2021-01-22 | 北京计算机技术及应用研究所 | Air interface signal interference detection method for ultrahigh frequency RFID system |
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