CN103514637A - DSRC-based adjacent channel interference prevention method and device, and application system - Google Patents
DSRC-based adjacent channel interference prevention method and device, and application system Download PDFInfo
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- CN103514637A CN103514637A CN201210199313.5A CN201210199313A CN103514637A CN 103514637 A CN103514637 A CN 103514637A CN 201210199313 A CN201210199313 A CN 201210199313A CN 103514637 A CN103514637 A CN 103514637A
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Abstract
The invention discloses a DSRC-based adjacent channel interference prevention method and device, and an application system. The method comprises the following steps: the signal receiving step, wherein a RSU is used to receive microwave signals sent by OBUs; the positioning step, wherein the RSU is used to acquire the positioning information of the OBUs according to the microwave signals sent by the OBUs; the determining step, wherein the RSU is used to determine whether positions of the OBUs are in a default processing region according to the positioning information of the OBUs; and a processing step, wherein the RSU is used to give out a processing instruction according to a default scheme if the positions of the OBUs are in the default processing region. The method and device of the invention are used to determine whether a vehicle is a vehicle on the present channel or a vehicle on an adjacent channel through the vehicle positioning technology, and process the vehicle on the present channel according to the determination result to make the normal interaction process between the OBU on the vehicle on the present channel and the RSU will not be interfered by the OBU on vehicle on an adjacent channel, so that the vehicle adjacent channel interference problem can be effectively solved, and the probability of error handling can be reduced.
Description
Technical field
The application relates to intelligent transportation (ITS:Intelligent Transportation System) field, relates in particular to a kind of anti-monkey chatter method, device and DSRC application system based on Dedicated Short Range Communications, technology (DSRC:Dedicated Short Range Communications).
Background technology
The employing DSRC key equipment roadside units (RSU:Road Side Unit) such as ETC electric non-stop toll (ETC:Electronic Toll Collection) system and board units (OBU:On-board Units) are charged to vehicle, detect, monitoring or management, there is sometimes monkey chatter problem in these systems: when the OBU on the vehicle in JiRSUYu Zhe track carries out information interaction in operational process, the vehicle in adjacent track may also can enter in the signal coverage areas of this RSU, and by its OBU, to RSU, send information at one time, normal reciprocal process between OBU on the vehicle in Dui Zhe track and RSU produces to be disturbed, for example, in ETC system, these disturb and cause sometimes error in charging, detect the generation of the phenomenons such as mistake, for example some vehicle is repeated to charge, and to the not charge of some vehicle.
In order to ensure the normal operation of DSRC application system, anti-monkey chatter problem urgently to be resolved hurrily.
Summary of the invention
The application provides anti-monkey chatter method, device and the DSRC application system based on DSRC that a kind of interference free performance is good.
According to the application's first aspect, the anti-monkey chatter method of the application's protection based on DSRC, comprises the following steps:
Signal is accepted step: RSU receives the microwave signal that OBU sends;
Positioning step: RSU, according to the microwave signal of described OBU transmission, obtains the locating information of described OBU;
Determining step: RSU is according to described OBU locating information, judges that its position is whether in default processing region;
Treatment step: if described OBU position in default processing region, RSU sends processing instruction by presupposed solution.
In a kind of embodiment, in described treatment step, the concrete mode that RSU sends processing instruction by presupposed solution is: RSU sends charge instruction to described OBU.
In a kind of embodiment, in described judgment processing steps, if judging described OBU position, RSU not in default processing region, do not send processing instruction.
In a kind of embodiment, in described positioning step, the locating information of described OBU comprises the position coordinates of first direction.
In a kind of embodiment, in described positioning step, the locating information of described OBU also comprises the position coordinates of second direction, and wherein, first direction is vertical with second direction.
In a kind of embodiment, described positioning step adopts phase differential localization method.
According to the application's second aspect, the application has also protected a kind of anti-monkey chatter device based on DSRC, comprises RSU, and described RSU comprises:
Signal is accepted module: the microwave signal sending for receiving OBU;
Locating module: for the microwave signal sending according to described OBU, obtain the locating information of described OBU;
Judge module: for according to the locating information of described OBU, judge that described OBU position is whether in default processing region;
Processing module, when judging that when described judge module described OBU position is in default processing region, sends processing instruction by presupposed solution.
In a kind of embodiment, described processing module is transaction modules, for sending charge instruction to described OBU.
According to the application's the third aspect, the application has also protected a kind of DSRC application system, comprises the above-described anti-monkey chatter device based on DSRC.
In a kind of embodiment, described special-purpose short distance communication applications system is bicycle road band barrier machine ETC system, multilane band barrier machine ETC system, bicycle road Free-flow system or multilane Free-flow system, described signal receiving module is arranged on the corresponding track of described bicycle road band barrier machine ETC system, multilane band barrier machine ETC system or bicycle road Free-flow system, or is arranged at least one the Free-flow section in multilane Free-flow system.
In a kind of embodiment, described special-purpose short distance communication applications system comprises at least one in vehicle detecting system, vehicle speed measuring system, model recognition system, image identification system, video capture system.
The application's beneficial effect is: the application is applied to highway communication field, utilize vehicle positioning technology to judge whether OBU is positioned at default process range, if OBU is in default process range, RSU thinks the vehicle Wei Zhe road vehicle with this OBU, according to presupposed solution, send processing instruction, to charging or other forms of processing with the vehicle of this OBU, if OBU is not in default process range, RSU thinks that the vehicle with this OBU is neighboring trace vehicle, it is not processed, therefore the application can effectively judge that vehicle belongs to this road vehicle or neighboring trace vehicle, and to its differentiating and processing, OBU on can't Dui Zhe road vehicle of OBU on neighboring trace vehicle and the normal reciprocal process between RSU are produced to be disturbed, thereby effectively solved vehicle monkey chatter problem, guaranteed the normal operation of DSRC application system.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of OBU signal processing method of the anti-monkey chatter of a kind of embodiment of the application;
Fig. 2 is the side view that the vehicle of a kind of embodiment of the application is positioned at RSU signal coverage areas;
Fig. 3 is the receiving antenna layout of the localization method of a kind of embodiment of the application;
Fig. 4 is the structured flowchart of OBU signal processing apparatus of the anti-monkey chatter of a kind of embodiment of the application.
Embodiment
Below by embodiment, by reference to the accompanying drawings the application is described in further detail.
In the application's embodiment, RSU utilizes location technology to determine the locating information of carrying out the OBU on mutual vehicle with RSU, thereby determine GaiOBU position, RSU judges whether GaiOBU position is positioned at default processing region again, if so, think with the vehicle Wei Zhe road vehicle of this OBU, it is charged or other forms of processing, otherwise can think that this vehicle is neighboring trace vehicle, does not process it.
Embodiment mono-:
The information interaction of the anti-monkey chatter method of present embodiment based between RSU and OBU.Wherein, RSU comprises outdoor unit and indoor unit, RSU outdoor unit has dual-mode antenna, for sending microwave signal to OBU and receiving the microwave signal from OBU, RSU outdoor unit is arranged on road top or sidepiece conventionally, and RSU indoor unit is processed for the information of RSU outdoor unit being controlled and RSU outdoor unit is received and sent; OBU also has antenna, and for sending microwave signal to RSU and receiving the microwave signal from RSU, OBU is arranged in vehicle conventionally, for example, be fixed on the front windshield of vehicle.Please refer to Fig. 1 and Fig. 2, the method for the present embodiment mainly comprises with step:
S101: after in the first vehicle enters the RSU signal coverage areas shown in dotted line, the wake-up signal wakes that the OBU1 installing on this vehicle is periodically sent by RSU, thus OBU1 sends between answer signal and RSU and sets up communication link to RSU.
S102:RSU sends microwave signal to OBU1, in this microwave signal, carry request data frame, the particular content of this request data frame is determined as required, be generally used for asking OBU1 to return to certain information to RSU, such as the request data frame of the present embodiment, be used for asking information of vehicles (comprise the information such as license plate number, vehicle model, vehicle color one or more).
S103:OBU1 receives after the microwave signal of RSU, it is resolved, then by internal calculation, obtain the information of vehicles that RSU asks and be packaged into reply data frame, then to RSU, sending microwave signal, the information such as ID that this microwave signal comprises reply data frame and OBU1.
S104: signal receiving step, RSU receives the microwave signal B that OBU 1 returns to RSU.
S105: positioning step: RSU obtains reply data frame after microwave signal B is resolved, and the locating information of utilizing this microwave signal B to obtain OBU1 is the locating information of the first vehicle.In the present embodiment, RSU carries out the location of both direction and obtains the locating information that comprises two-dimensional coordinate OBU, the locating information that is OBU 1 comprises that this OBU 1 is at the position coordinates y1 of first direction and the position coordinates x1 of second direction, wherein second direction is interior and mutually vertical with first direction Dou road surface plane, first direction is parallel with road bearing of trend, and second direction is vertical with road bearing of trend.The method that obtains the locating information of OBU 1 comprises multiple, for example phase differential localization method or signal intensity localization method, the former utilizes in RSU corresponding phase difference value when different receiving antennas receive same microwave signal to position OBU 1, and the latter utilizes in RSU corresponding signal intensity size when receiving antenna receives microwave signal to position OBU 1.
For example a kind of phase differential localization method of microwave signal is specially:
Please refer to Fig. 3, utilize receiving antenna 1, receiving antenna 2, the receiving antenna 3 of on same straight line, arranging to form antenna sets and receive the microwave signal that same OBU sends, the distance d between receiving antenna 1 and receiving antenna 2<sub TranNum="98">12</sub><λ, the distance d between receiving antenna 1 and receiving antenna 3<sub TranNum="99">13</sub>>N λ, arrival bearing and the angle between aerial array normal of the microwave signal that OBU sends are θ, i.e. the deflection of microwave signal.When microwave signal arrives respectively three receiving antennas, because distance between microwave signal and receiving antenna is distant, belong to receiving antenna far-field region, therefore be equivalent to each receiving antenna of the parallel arrival of microwave signal, the phase place of the microwave signal that the microwave signal that receiving antenna 2 receives receives than receiving antenna 1 lags behind<img TranNum="100" file="BDA00001773599500041.GIF" he="37" img-content="drawing" img-format="GIF" inline="yes" orientation="portrait" wi="80"/>being receiving antenna 2 with respect to the phase differential of receiving antenna 1 is<img TranNum="101" file="BDA00001773599500042.GIF" he="37" img-content="drawing" img-format="GIF" inline="yes" orientation="portrait" wi="110"/>the phase place of the microwave signal that the microwave signal that receiving antenna 3 receives receives than receiving antenna 1 lags behind<img TranNum="102" file="BDA00001773599500043.GIF" he="38" img-content="drawing" img-format="GIF" inline="yes" orientation="portrait" wi="79"/>being receiving antenna 3 with respect to the phase differential of receiving antenna 1 is<img TranNum="103" file="BDA00001773599500044.GIF" he="38" img-content="drawing" img-format="GIF" inline="yes" orientation="portrait" wi="110"/>
?
(formula one)
?
(formula two)
Wherein,
for obtaining phase differential by phase bit comparison
time the actual number of degrees, due to
therefore this numerical value has uniqueness.
In order to determine N value, can utilize following formula:
In above formula, d
12and d
13it is known,
can obtain actual read number by phase bit comparison, and
can calculate according to formula three.
In acceptable error range, if hypothesis:
Can obtain following formula to determine N in conjunction with formula three:
Consider
in include the error that in signal receiving path, every processing causes, by formula three, calculated
error numerical value be
error numerical value
therefore by formula three and formula two, calculate
approximately equal only, cannot be completely equal, as long as calculate
error in tolerance interval, just can determine θ with obtaining following formula in conjunction with formula two and formula four:
(formula five)
In above derivation, from formula two,
numerical value and the difference between default be
n value is larger,
error amount less, yet the excessive d of N value
13larger, the total length that causes positioning antenna increases and layout is difficult, so can choose 3≤N≤10, can either guarantee certain positioning precision, again convenient antenna layout.Finally, according to the numerical value of θ, in conjunction with setting height(from bottom) and the angle of each receiving antenna, calculate the locating information of OBU, it is at the concrete coordinate of overlay area, RSU antenna vertical projection point the place ahead.
According to carrying out one dimension location to OBU with upper type, if increase again one group of antenna sets vertical with above antenna sets, adopt same processing mode to carry out two-dimensional localization to OBU.
S106: determining step: RSU is according to the locating information of OBU 1, judge that the position of this OBU 1 is whether in default processing region, judgment mode has a variety of, for example a kind of mode can prestore in processing region all location points at the position coordinates of first direction and second direction, if OBU 1 is identical with the position coordinates of a certain location point prestoring with the position coordinates x1 of second direction at the position coordinates y1 of first direction, show that the position of OBU 1 is in the processing region prestoring, otherwise the position that shows OBU 1 is not in the processing region prestoring; The predeterminable processing region of another kind of mode is at the interval range of first direction and second direction, if OBU 1 at the position coordinates y1 of first direction and the position coordinates x1 of second direction all in default interval range, show that the position of OBU 1 is in the processing region prestoring, otherwise the position that shows OBU 1 is not in the processing region prestoring.
S107: if the position of RSU judgement OBU 1 is in default processing region, look the first vehicle Wei Zhe road vehicle, RSU sends processing instruction according to presupposed solution to OBU 1, for example processing instruction can be charge instruction, preparation is to the processing of charging of the first vehicle, certainly, according to specific needs, RSU also can send according to presupposed solution other processing instruction, such as processing instruction, can be and detect instruction, monitored instruction, photographing instruction etc., be respectively used to other forms of processing such as the first vehicle detect, monitors, takes pictures.
For the second vehicle, be similar to step S101 to step S105, the microwave signal A that RSU sends according to the OBU 2 installing on this vehicle obtains the locating information of this OBU 2, comprise that OBU 2 is at the position coordinates y2 of first direction and the position coordinates x2 of second direction, similar and step S106 are to step S107, if RSU judges that the position of this OBU 2 is not in default processing region, depending on the second vehicle, be neighboring trace vehicle, it is not dealt with, or in some embodiment, also after can handling this road vehicle, neighboring trace vehicle is delayed to processing, for example RSU can preferentially send processing instruction to OBU 1, to OBU 2, send same processing instruction again.
In practical application, information interaction between RSU and each OBU may have repeatedly, the microwave signal that OBU sends to RSU correspondingly also has a plurality of, these microwave signals all comprise No. ID of OBU, in order to reach the object of location, in the microwave signal that OBU sends to RSU, at least should there is a microwave signal for location.
Embodiment bis-:
What the present embodiment was different from a upper embodiment is, in the process that RSU positions OBU, only realized the location of a direction, especially realized OBU be parallel to road bearing of trend first direction location and obtain the locating information that comprises a dimension coordinate, particularly, the present embodiment is in the positioning step of OBU 1, the locating information that obtains OBU 1 comprises that OBU 1 is at the position coordinates y1 of first direction, in determining step, judgment mode has a variety of, for example a kind of mode can prestore in processing region all location points at the position coordinates of first direction, if the position coordinates y1 at first direction of OBU 1 is identical with the position coordinates of a certain location point prestoring, show that the position of OBU 1 is in the processing region prestoring, otherwise show that the position of OBU 1 is not in the processing region prestoring, the predeterminable processing region of another kind of mode is at the interval range of first direction, if the position coordinates y1 at first direction of OBU 1 is in default interval range, show that the position of OBU 1 is in the processing region prestoring, otherwise the position that shows OBU 1 is not in the processing region prestoring.
Embodiment tri-:
As shown in Figure 4, the present embodiment comprises RSU for realizing the anti-monkey chatter device based on DSRC of embodiment mono-or embodiment bis-, and RSU mainly comprises signal receiving module 10, locating module 20, judge module 30 and processing module 40.
Wherein, signal is accepted module 10 and is arranged on RSU outdoor unit, and it comprises antenna, the microwave signal sending for receiving OBU.
The microwave signal of locating module 20 for sending according to OBU, the locating information of acquisition OBU.According to the difference of locator meams, locating module 20 can carry out the location of a direction and obtain the locating information that comprises a dimension coordinate OBU, also can carry out the location of both direction and obtain the locating information that comprises two-dimensional coordinate.
The anti-monkey chatter method of the above embodiment of the application can be widely used in all kinds of DSRC application systems, such as bicycle road band barrier machine ETC system, multilane band barrier machine ETC system, bicycle road Free-flow system, multilane Free-flow system and for vehicle being monitored in real time or the various types of vehicles supervisory system such as the vehicle speed measuring system of inspection in violation of rules and regulations, model recognition system, image identification system, video capture system.Wherein, signal receiving module is arranged on bicycle road band barrier machine electronics ETC system, on the corresponding track of multilane band barrier machine ETC system or bicycle road Free-flow system, or be arranged at least one the Free-flow section in multilane Free-flow system, can accurately identify this road vehicle and neighboring trace vehicle, Bing Duizhe road vehicle is accurately realized non-parking charge, and neighboring trace vehicle is not charged, avoiding normal reciprocal process between OBU on neighboring trace vehicle Dui Zhe road vehicle and RSU to produce disturbs, thereby avoided error in charging, detect the generation of the phenomenons such as mistake, guarantee normally carrying out of charge.Above embodiment bis-can be used for bicycle road DSRC application system, and the structure of RSU is more relative with information processing side simple, and cost is lower, and embodiment mono-can be used for bicycle road or multilane DSRC application system, and judged result more accurately, reliably.
The application judges it according to the particular location of vehicle, and whether Zhe road travels, in actual application, interference free performance is good, greatly reduce the wrong probability of processing, and the application is without existing equipment structure being made to larger change or being increased any utility appliance, therefore can not increase equipment cost.
Above content is the further description of the application being done in conjunction with concrete embodiment, can not assert that the application's concrete enforcement is confined to these explanations.For the application person of an ordinary skill in the technical field, not departing under the prerequisite of the application's design, can also make some simple deduction or replace.
Claims (10)
1. the anti-monkey chatter method based on Dedicated Short Range Communications,, is characterized in that, comprises the following steps:
Signal is accepted step: roadside unit receives the microwave signal that board units sends;
Positioning step: roadside unit, according to the microwave signal of described board units transmission, obtains the locating information of described board units;
Determining step: roadside unit is according to the locating information of described board units, judges that its position is whether in default processing region;
Treatment step: if the position of described board units in default processing region, roadside unit sends processing instruction by presupposed solution.
2. the method for claim 1, is characterized in that, in described treatment step, the concrete mode that roadside unit sends processing instruction by presupposed solution is: roadside unit sends charge instruction to described board units.
3. the method for claim 1, is characterized in that, in described judgment processing steps, if roadside unit judges the position of described board units, not in default processing region, does not send processing instruction.
4. the method for claim 1, is characterized in that, in described positioning step, the locating information of described board units comprises the position coordinates of first direction.
5. method as claimed in claim 4, is characterized in that, in described positioning step, the locating information of described board units also comprises the position coordinates of second direction, and wherein, first direction is vertical with second direction.
6. the method as described in any one in claim 1 to 5, is characterized in that, described positioning step adopts phase differential localization method.
7. the anti-monkey chatter device based on Dedicated Short Range Communications,, is characterized in that, comprise roadside unit, described roadside unit comprises:
Signal is accepted module: the microwave signal sending for receiving board units;
Locating module: for the microwave signal sending according to described board units, obtain the locating information of described board units;
Judge module: for according to the locating information of described board units, judge that the position of described board units is whether in default processing region;
Processing module: when the position that judges described board units when described judge module is in default processing region, send processing instruction by presupposed solution.
8. device as claimed in claim 7, is characterized in that, described processing module is transaction modules, for sending charge instruction to described board units.
9. a special-purpose short distance communication applications system, is characterized in that, comprises the anti-monkey chatter device described in claim 7 or 8.
10. system as claimed in claim 9, it is characterized in that, described special-purpose short distance communication applications system is bicycle road band barrier machine electronic charging system without parking, bicycle road Free-flow system or multilane Free-flow system, described signal receiving module is arranged on the corresponding track of described bicycle road band barrier machine electronic charging system without parking or bicycle road Free-flow system, or is arranged at least one the Free-flow section in multilane Free-flow system.
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| CN104569911A (en) * | 2014-10-29 | 2015-04-29 | 深圳市金溢科技股份有限公司 | OBU positioning method, RSU and ETC system |
| CN105118098A (en) * | 2015-06-26 | 2015-12-02 | 深圳市金溢科技股份有限公司 | Method and system for preventing car following or adjacent lane interference, vehicle-mounted unit and road side unit |
| WO2018058375A1 (en) * | 2016-09-28 | 2018-04-05 | 华为技术有限公司 | Communication method and terminal |
| CN109658532A (en) * | 2019-02-20 | 2019-04-19 | 深圳成谷科技有限公司 | A kind of ETC charging method and system based on multibeam antenna |
| CN109831764A (en) * | 2019-02-20 | 2019-05-31 | 北京云星宇交通科技股份有限公司 | A kind of method and system that the anti-monkey chatter suitable for OBU electronic tag is traded |
| CN110012453A (en) * | 2019-04-11 | 2019-07-12 | 深圳成有科技有限公司 | Communication system, communication means and storage medium |
| CN110278042A (en) * | 2019-06-25 | 2019-09-24 | 江西省高速公路联网管理中心 | Anti- monkey chatter method and apparatus based on satellite difference positioning |
| CN112037345A (en) * | 2020-07-21 | 2020-12-04 | 深圳成谷智能科技有限公司 | Method and device for preventing ETC portal system from mischarging and electronic equipment |
| CN114202817A (en) * | 2021-11-30 | 2022-03-18 | 广州市凌特电子有限公司 | ETC radio environment monitoring guarantee method, system, equipment and medium |
| CN114694271A (en) * | 2020-12-29 | 2022-07-01 | 北京万集科技股份有限公司 | Resource allocation method, device, system, computer equipment and medium |
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| CN109831764A (en) * | 2019-02-20 | 2019-05-31 | 北京云星宇交通科技股份有限公司 | A kind of method and system that the anti-monkey chatter suitable for OBU electronic tag is traded |
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| CN110278042A (en) * | 2019-06-25 | 2019-09-24 | 江西省高速公路联网管理中心 | Anti- monkey chatter method and apparatus based on satellite difference positioning |
| CN112037345A (en) * | 2020-07-21 | 2020-12-04 | 深圳成谷智能科技有限公司 | Method and device for preventing ETC portal system from mischarging and electronic equipment |
| CN114694271A (en) * | 2020-12-29 | 2022-07-01 | 北京万集科技股份有限公司 | Resource allocation method, device, system, computer equipment and medium |
| CN114202817A (en) * | 2021-11-30 | 2022-03-18 | 广州市凌特电子有限公司 | ETC radio environment monitoring guarantee method, system, equipment and medium |
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