CN104463993B - A kind of method solving etc monkey chatter - Google Patents
A kind of method solving etc monkey chatter Download PDFInfo
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- CN104463993B CN104463993B CN201410768002.5A CN201410768002A CN104463993B CN 104463993 B CN104463993 B CN 104463993B CN 201410768002 A CN201410768002 A CN 201410768002A CN 104463993 B CN104463993 B CN 104463993B
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- rsu
- neighboring trace
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- bst
- transaction
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
- G07B15/00—Arrangements or apparatus for collecting fares, tolls or entrance fees at one or more control points
- G07B15/06—Arrangements for road pricing or congestion charging of vehicles or vehicle users, e.g. automatic toll systems
- G07B15/063—Arrangements for road pricing or congestion charging of vehicles or vehicle users, e.g. automatic toll systems using wireless information transmission between the vehicle and a fixed station
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The present invention provides a kind of method solving etc monkey chatter, the linkage between adjacent roadside unit RSU is realized by some semaphores, this road RSU is initialized as broadcast state, the semaphore sent according to the neighboring trace RSU received determines whether to open broadcast intervalometer, when only receiving the semaphore being in transaction that neighboring trace RSU sends, this road RSU could send BST；When this road RSU sends BST, send semaphore simultaneously and trigger the neighboring trace RSU transmission signal as interference；When this road RSU receives OBU response entrance stateful transaction, send semaphore simultaneously and trigger the BST transmission of neighboring trace RSU；When this road RSU and neighboring trace RSU enters stateful transaction, separate between RSU, it is independent of each other.The present invention has the advantage that with good effect: solve neighboring trace transaction and neighboring trace forward direction interference problem by mistake, and method realizes simple.
Description
Technical field
The invention belongs to etc signal identification and processing technology field, especially relate to a kind of solution etc adjacent
The method of road interference.
Background technology
In highway toll collection system (ETC system), " monkey chatter " exists always,
Affect the large-scale application of ETC system.
So-called " monkey chatter ", comprises two kinds of interference phenomenons:
(1) neighboring trace by mistake transaction: refer to that roadside unit RSU on a track is except can be with this track
The OBU transaction of the vehicle passed through, additionally it is possible to hand over the OBU of the vehicle passed through on adjacent lane
Easily, thus cause " deducting fees " by mistake, have influence on the current of vehicle.Such as OBU vehicle goes out from MTC track
Entrance is concluded the business by ETC track through out-of-date, or OBU vehicle normally travels Shi Beifu road ETC from major trunk roads
Charge slip of the tongue transaction, or OBU enter this ETC track after waken up up by the RSU in adjacent ETC track and hand over
Easily, neighboring trace transaction interference by mistake is broadly fallen into, as shown in Figure 1.
(2) neighboring trace forward direction interference: this track OBU is in process of exchange, if receiving adjacent lane
The BST order that RSU launches, OBU meeting link re-establishment, Bu Yuzhe road RSU has continued exchange, transaction
Flow process is interfered, and causes Fail Transaction.As shown in Figure 2.
At present, the method solving monkey chatter specifically includes that
(1) accurately control the coverage of RSU, make the signal of RSU only cover this track, it is to avoid be adjacent
The misoperation of road OBU.Due to the characteristic of radiofrequency signal, the method technical difficulty is high, is difficult to accomplish accurately
Cover.And OBU accepts the difference of sensitivity, it is difficult to take into account covering and transaction success rate.
(2) additional RSU is installed, uses additional RSU that OBU is positioned, so that it is determined that OBU institute
In track, it is to avoid monkey chatter.This kind of method needs the cooperation of additional RSU, is greatly increased the one-tenth of system
This, simultaneously need to central control unit, increase complexity.
(3) use multibeam antenna, utilize beam forming technique, adjust the efficient communication of ETC transaction
Region, in real time the OBU exact position in detection ETC track is, and according to the position adjustment of electronic tag with send out
Penetrate orientation downlink wave beam, realize in the way of space division multiplexing and the concurrent communication of multiple vehicle carried electronic labels.
This technical difficulty is big, and antenna and RF hardware are complicated, improve the cost of RSU.
Summary of the invention
For the problems referred to above, it is an object of the invention to provide a kind of method solving etc monkey chatter.
The core concept of the present invention is: by the simple linkage between RSU, utilize the noise receiving signal
Monkey chatter problem is solved than principle.
For solving above-mentioned technical problem, the technical solution used in the present invention is:
A kind of method solving etc monkey chatter, realizes adjacent roadside unit RSU by some semaphores
Between linkage,
This road RSU is initialized as broadcast state, determines according to the semaphore that the neighboring trace RSU received sends is
No unlatching broadcasts intervalometer, when only receiving the semaphore being in transaction that neighboring trace RSU sends, and this road
RSU could send BST；
When this road RSU sends BST, send semaphore simultaneously and trigger neighboring trace RSU transmission as interference
Signal；
When this road RSU receives OBU response entrance stateful transaction, send semaphore simultaneously and trigger neighboring trace RSU
BST send；
When this road RSU and neighboring trace RSU enters stateful transaction, separate between RSU, the most not shadow
Ring.
Preferably, according to definition channel rejection ratio and distance factor using the signal of neighboring trace RSU as this road
The interference signal of RSU.
Preferably, by definition broadcast intervalometer, send BST by broadcast intervalometer on time and trigger letter
Number amount.
Preferably, the status signal amount of definition RSU, distinguish broadcast state and etc stateful transaction.
The present invention has the advantage that with good effect:
Solve neighboring trace transaction and neighboring trace forward direction interference problem by mistake, and method realizes simple.
Accompanying drawing explanation
Fig. 1 is neighboring trace transaction schematic diagram by mistake；
Fig. 2 is that neighboring trace forward direction disturbs schematic diagram；
Fig. 3 is that three RSU dispose schematic diagram；
Fig. 4 is that RSU of the present invention initializes flow process；
Fig. 5 be neighboring trace RSU of the present invention send ETC eat dishes without rice or wine instruction time, this road RSU links handling process；
When Fig. 6 is neighboring trace RSU state of the present invention change, this road RSU links handling process；
Fig. 7 is this road of present invention RSU broadcast and stateful transaction hand-off process flow process.
Detailed description of the invention
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is elaborated.
A kind of method solving etc monkey chatter, realizes adjacent roadside unit RSU by some semaphores
Between linkage, according to definition channel rejection ratio and distance factor using the signal of neighboring trace RSU as this road
The interference signal of RSU；
This road RSU is initialized as broadcast state, initializes broadcast intervalometer, according to the neighboring trace RSU received
The semaphore of the instruction state sent determines whether to open broadcast intervalometer, only receives neighboring trace RSU and sends out
During the semaphore being in transaction sent, this road RSU could send BST；
When this road RSU sends BST, send semaphore simultaneously and trigger neighboring trace RSU transmission PN9 as dry
Disturb signal；
When this road RSU receives OBU response entrance stateful transaction, send semaphore simultaneously and trigger neighboring trace RSU
BST send；
When this road RSU and neighboring trace RSU enters stateful transaction, separate between RSU, the most not shadow
Ring.
The linkage between adjacent R SU is realized by 7 semaphores between embodiment of the present invention adjacent R SU；
By semaphore G1 (G1 ') output, the output when this road RSU sends BST or transaction frame
Start pulse signal amount G1, triggers neighboring trace RSU and sends PN9 or BST；
Exported by semaphore G2, this road RSU state is indicated to two neighboring trace RSU, according to obtaining
The Vs quantity of state taken correspond to 0 or 1；Wherein quantity of state Vs self status, 0 represents
Broadcast state, i.e. interval send BST；1 represents stateful transaction, i.e. with the success of OBU link setup, enters
Row transaction；
By semaphore G3 (G3 ') input, it is connected with the G1 of neighboring trace RSU (G1 '), root
According to self and the state of adjacent R SU, trigger PN9 or BST and send；
By semaphore G4 (G4 ') input, receive state Vs of neighboring trace RSU, when state is sent out
During changing, this road RSU makes respective handling；
Broadcast intervalometer of the present invention is BST transmission timer, and the present invention is defined as intervalometer Tbst,
Time-out sends BST, and exports triggering signal, triggers the linkage flow process of neighboring trace RSU.
Fig. 4 is that RSU initializes flow process, and this road RSU is initialized as broadcast state, as shown in Figure 4, just
Beginningization BST transmission timer, determines whether to open BST transmission timer according to neighboring trace RSU state.
Tu5Wei Zhe road RSU receives the linkage flow process triggered when neighboring trace RSU sends broadcast or BST, when
When a certain neighboring trace RSU sends BST or transaction signaling, this road RSU is according to oneself state and adjacent two neighbours
The state of road RSU processes；Wherein PN9 does not the most produce impact for broadcast and transaction, so sending
PN9 Shi Zhe road RSU does not trigger the handling process of neighboring trace RSU；When sending BST, if two neighboring trace RSU
All in stateful transaction, then may causing forward direction monkey chatter, sending out so needing to trigger another neighboring trace RSU
Send PN9.
Fig. 6 is to trigger RSU linkage flow process in this road during the change of neighboring trace RSU state, and when this road, RSU state is
During transaction, it is not affected by the state of neighboring trace RSU；When this road RSU state is for broadcast, as long as certain
One neighboring trace RSU is in stateful transaction, and the transmission of BST or PN9 of this road RSU is just triggered by neighboring trace RSU.
Fig. 7 is RSU broadcast and stateful transaction switching, when, after OBU response VST, RSU state sets
It is set to transaction, triggers two neighboring trace RSU and perform linkage flow process as shown in Figure 6；When after closing the transaction,
RSU state is set to broadcast state, arranges broadcast timer state according to two neighboring trace RSU states,
Trigger another neighboring trace RSU simultaneously and perform linkage flow process as shown in Figure 6.
The principle that the present invention solves monkey chatter is as follows:
(1) for neighboring trace transaction by mistake, linked by semaphore between adjacent R SU, as this road RSU
When (calling RSU2 in the following text) sends arm's length dealing signal, neighboring trace RSU (calling RSU1 in the following text) sends corresponding " interference "
Signal.For this road RSU buying signals, neighboring trace " disturbs " signal to be equivalent to noise, due to logical
The channel rejection ratio specified in letter agreement and distance factor, neighboring trace signal intensity is much smaller than this road signal intensity,
The signal to noise ratio that OBU accepts signal is higher, accepts signal according to the noise robustness principle of digital signal
Signal to noise ratio more high bit-error is the lowest, and therefore OBU can correctly accept this road RSU buying signals, neighboring trace RSU
Noise do not interfere with the arm's length dealing of this road RSU, thus solve neighboring trace transaction issues by mistake.Equally, right
In neighboring trace, the signal that RSU2 sends is equivalent to noise, if neighboring trace exists OBU, then OBU can not resolve
The signal of RSU2 is without producing neighboring trace transaction by mistake.
(2) neighboring trace forward direction is disturbed, linked by adjacent R SU, a certain RSU Yu OBU link setup
After success, the BST of adjacent R SU sends and is controlled by link setup success RSU.Such as, RSU2 Yu OBU link setup
After success, the BST of RSU1 sends by RSU2 control, only when RSU2 sends transaction signaling, and RSU1
BST could be sent, as it was previously stated, the BST that now RSU1 is sent is next for the transaction signaling of RSU2
Say and be equivalent to noise, do not interfere with the transaction of RSU2 Yu OBU；Meanwhile, permit in RSU2 process of exchange
Permitted RSU1 transmission BST will the trading efficiency of RSU1 and the impact of success rate be preferably minimized.
If now, after RSU1 sends BST, track 1 has OBU with RSU1 foundation to be connected, due to ETC
In signaling, only BST can interrupt transaction flow, so after RSU1 link setup, the transmission of subsequent transaction signaling
Independently carry out, do not controlled by adjacent R SU.To sum up 2 point, solves neighboring trace forward direction interference problem.
It should be noted that for sake of convenience, the present invention, when illustrating principle, uses only two
The situation that RSU is adjacent, but the method for the invention can be generalized to 3 situations adjacent for RSU, as
Shown in Fig. 3, when multiple RSU are deployed in same cross section successively, each RSU only with two adjacent RSU
Monkey chatter occurs, and the most each RSU constitutes unit as shown in Figure 3 with adjacent two RSU,
So the present invention is applicable to the ordinary circumstance that many RSU dispose.It is embodied as the illustrated flow process of chapters and sections, is all
Illustrate by ordinary circumstance.
Explanation of nouns in the present invention:
OBU i.e. board units OBU (On Board Unit, be called for short OBU), be also called electronic tag,
Mobile unit, is a kind of mobile identification equipment with microwave communication function and information storage function, installs
At vehicle interior (on windshield or instrument desk) and support by DSRC and roadside device
The equipment of the information of carrying out exchange.
RSU i.e. roadside unit (Road-Side Units is called for short RSU), is also called electronic label read-write
It is arranged on the lane in which the drivers should pay fees door frame or on toll island column, for carrying out with the mobile unit on vehicular traffic
Communication and data interaction.
BST (Beacon Service Table) beacon service table.
VST (Vehicle Service Table) vehicle service table.
Above embodiments of the invention are described in detail, but described content has been only the preferable of the present invention
Embodiment, it is impossible to be considered the practical range for limiting the present invention.All made according to the present patent application scope
Impartial change and improvement etc., within all should still belonging to the patent covering scope of the present invention.
Claims (4)
1. the method solving etc monkey chatter, it is characterised in that: realized by some semaphores
Linkage between adjacent roadside unit RSU,
This road RSU is initialized as broadcast state, determines according to the semaphore that the neighboring trace RSU received sends is
No unlatching broadcasts intervalometer, when only receiving the semaphore being in transaction that neighboring trace RSU sends, and this road
RSU could send BST；
When this road RSU sends BST, send semaphore simultaneously and trigger neighboring trace RSU transmission as interference
Signal；
When this road RSU receives OBU response entrance stateful transaction, send semaphore simultaneously and trigger neighboring trace RSU
BST send；
When this road RSU and neighboring trace RSU enters stateful transaction, separate between RSU, the most not shadow
Ring.
The method of solution etc monkey chatter the most according to claim 1, it is characterised in that: root
According to the channel rejection ratio of definition and distance factor using the signal of neighboring trace RSU as the interference signal of this road RSU.
The method of solution etc monkey chatter the most according to claim 1, it is characterised in that: logical
Cross definition broadcast intervalometer, send BST by broadcast intervalometer on time and trigger semaphore.
The method of solution etc monkey chatter the most according to claim 1, it is characterised in that: fixed
The status signal amount of justice RSU, distinguishes broadcast state and etc stateful transaction.
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| CN201410768002.5A CN104463993B (en) | 2014-12-11 | 2014-12-11 | A kind of method solving etc monkey chatter |
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| CN201410768002.5A CN104463993B (en) | 2014-12-11 | 2014-12-11 | A kind of method solving etc monkey chatter |
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| CN104463993A CN104463993A (en) | 2015-03-25 |
| CN104463993B true CN104463993B (en) | 2017-01-04 |
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| CN111882680A (en) * | 2017-07-27 | 2020-11-03 | 周兴伍 | Vehicle equipment for electronic toll collection without stopping vehicle |
| CN111292532A (en) * | 2020-02-07 | 2020-06-16 | 北京易路行技术有限公司 | Device, communication system and method for detecting vehicle-mounted label on expressway |
| CN112654000A (en) * | 2020-12-23 | 2021-04-13 | 北京聚利科技有限公司 | Data transmission method and device |
| CN113313847B (en) * | 2021-04-23 | 2023-01-10 | 北京万集科技股份有限公司 | Electronic transaction method, roadside transaction terminal and vehicle-mounted transaction terminal |
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| JP2008167139A (en) * | 2006-12-28 | 2008-07-17 | Denso Corp | Road machine group system and road machine |
| FR2927185B1 (en) * | 2008-02-06 | 2013-12-20 | Cs Systemes D Information | SYSTEM AND METHOD FOR TELEPOWER WITHOUT DIRECTIONAL BEACON BARRIERS |
| CN102542620B (en) * | 2011-12-27 | 2014-03-26 | 北京握奇数据系统有限公司 | Method, equipment and system for controlling signal transmission time sequence of road side equipment |
| JP6071550B2 (en) * | 2012-12-28 | 2017-02-01 | 三菱重工メカトロシステムズ株式会社 | Vehicle communication system, vehicle-mounted device, program, and communication method |
| JP5957391B2 (en) * | 2013-02-15 | 2016-07-27 | 株式会社東芝 | Toll collection system |
| CN103745503B (en) * | 2013-03-27 | 2016-05-04 | 深圳市金溢科技股份有限公司 | Roadside device down link signal sequential control method and roadside device and system |
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Address after: Room 401, building 12, east area, airport business park, No. 80, Huanhe North Road, free trade zone (Airport Economic Zone), Binhai New Area, Tianjin 300000 Patentee after: Gaoxing Zhilian Technology Co.,Ltd. Address before: 300308, Zhongxing Industrial base, 2 East seven, Airport Economic Zone, Tianjin Binhai New Area Patentee before: ZTE INTELLIGENT IOT TECHNOLOGY Co.,Ltd. |
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Address after: Room 401, building 12, East Airport Business Park, 80 Huanhe North Road, Tianjin Binhai New Area pilot free trade zone (Airport Economic Zone) Patentee after: Zte Intelligent Iot Technology Co.,Ltd. Address before: Room 401, building 12, East Airport Business Park, 80 Huanhe North Road, Tianjin Binhai New Area pilot free trade zone (Airport Economic Zone) Patentee before: Gaoxing Zhilian Technology Co.,Ltd. |