CN102082587A - Data communication method and system of vehicle-mounted unit - Google Patents
Data communication method and system of vehicle-mounted unit Download PDFInfo
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- CN102082587A CN102082587A CN2009101885478A CN200910188547A CN102082587A CN 102082587 A CN102082587 A CN 102082587A CN 2009101885478 A CN2009101885478 A CN 2009101885478A CN 200910188547 A CN200910188547 A CN 200910188547A CN 102082587 A CN102082587 A CN 102082587A
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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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Abstract
The invention discloses a data communication method of a vehicle-mounted unit, comprising the following concrete steps: the vehicle-mounted unit receives wake-up frequency signals; the vehicle-mounted unit judges whether the wake-up frequency signals and the preset response frequency of the vehicle-mounted unit are matched; and when the response frequency of the vehicle-mounted unit and the wake-up frequency signals are matched, the vehicle-mounted unit establishes data communication with a road side unit. In the invention, the vehicle-mounted unit establishes data communication with the road side unit only when the received wake-up frequency signals and the set response frequency are matched, so that other communication data signals and undesirable wake-up frequency signals can not activate a controller to establish data communication with the road side unit, thereby greatly lowering the wake-up error rate of the vehicle-mounted unit, reducing unnecessary power consumption and prolonging the service life of the vehicle-mounted unit.
Description
Technical field
The present invention relates to the junction service field, be specifically related to a kind of no-stop charging system (Electronic Toll Collection, ETC) and corresponding board units and board units data processing method.
Background technology
Along with the development of short-range communication technology, in order to improve the current efficient of expressway tol lcollection, (Electronic Toll Collection ETC) obtains more and more widely utilization to no-stop charging system.
The national standard of non-parking charge (ETC), be in Ministry of Communications's networked fee collection technical standard about the part of equipment code, be to be applied to the technical standard that expressway tol lcollection is realized non-parking charge.Standard mainly stipulated board units (On Board Unit, OBU) and roadside unit (Road SideUnit, RSU) two equipment codes have been stipulated short-range communication protocol (DSRC).Wherein roadside unit is arranged on the lane in which the drivers should pay fees.Board units then is installed in vehicle interior, adopts IC-card to add the double-disk label scheme of controller (CPU), and wherein, this IC-card is used for depositing information such as account number, remaining sum, transaction record and gateway numbering; This controller is used for information such as vehicle physical parameter such as bicycle parking master, vehicle, for board units and roadside unit provide communication support.
The roadside unit and the board units of existing no-stop charging system all are provided with antenna oscillator, and board units can initiatively be communicated by letter with roadside unit, is modulated and receives by board units from the frequency signal that roadside unit sends.Board units all needs equipped with battery in the case.How not influencing under board units and the roadside unit communication service capabilities prerequisite, the power consumption that reduces board units is the problem of present technique area research always.
Summary of the invention
Main purpose of the present invention is: a kind of no-stop charging system and corresponding board units and board units data processing method that realizes low-power consumption and improve useful life is provided.
Technical problem of the present invention is solved by the following technical programs: a kind of data communications method of board units specifically may further comprise the steps: board units receives the wakeup frequency signal; Board units judges whether wakeup frequency signal and the predefined response frequency of board units mate; When the response frequency of board units and wakeup frequency Signal Matching, this board units and roadside unit are set up data communication.
In order to reduce power consumption, the controller of board units adopts low dominant frequency when coupling wakeup frequency signal.
Simultaneously, for the ease of calculating the cycle of wakeup frequency signal, the low dominant frequency that is used to calculate the timer clock source of wakeup frequency signal and controller during coupling is identical.
In order further to reduce power consumption, this controller is in low-power consumption mode when nontransaction; Controller adopts low dominant frequency when coupling wakeup frequency signal; Controller adopts high primary frequency when setting up the data communication transaction with roadside unit, thereby further reduces power consumption on the overall work pattern.
In the embodiments of the present invention, the scope of this response frequency is set at the 12-16 KHz.The controller of board units detects and the cycle of calculating the wakeup frequency signal, and when the wakeup frequency cycle of calculating dropped in the periodic regime of setting response frequency, the match is successful.
The invention still further relates to a kind of board units, comprise signal receiving unit, be used to receive the wakeup frequency signal; The Data Receiving link is used for setting up data communication with roadside unit; Controller, response frequency with setting, this controller is connected with the Data Receiving link with signal receiving unit respectively, this controller is used to judge whether the predefined response frequency of wakeup frequency signal and this board units mates, when response frequency and wakeup frequency Signal Matching, control this Data Receiving link and roadside unit and set up data communication.
The circuit cloth of this board units is made as: this controller and Data Receiving link are connected with the radio-frequency power supply switch between connecting, and this controller is controlled the radio-frequency power supply switch connection when response frequency and wakeup frequency Signal Matching, otherwise control radio-frequency power supply switch disconnects.
The no-stop charging system of the reduction power consumption that the invention further relates to comprises board units and roadside unit, this board units when the response frequency coupling of wakeup frequency signal that receives and setting and roadside unit set up data communication.
The present invention's beneficial effect compared with prior art is: 1) data communications method of board units of the present invention and system, its prerequisite are the strict response frequencies that limits of the controller of board units; The controller of this board units is just set up data communication with roadside unit when the response frequency coupling of wakeup frequency signal that receives and setting, therefore, other communication data signal and undesirable wakeup frequency signal all can't active controller and roadside unit set up data communication, greatly reduced the false wake-up rate of board units, reduce unnecessary power consumption, increased the useful life of board units; 2) data communications method of board units of the present invention and system, this controller adopts low dominant frequency (1 megahertz) when matching module coupling wakeup frequency signal, this matching module is when coupling wakeup frequency signal, the low dominant frequency of the clock source of timer and 1 megahertz of controller is identical, the power consumption of controller when therefore, matching module also is operated under the low dominant frequency with further reduction coupling; 3) data communications method of board units of the present invention and system, this controller is in low-power consumption mode when nontransaction, this controller with roadside unit set up data communication when transaction adopt operate as normal than high primary frequency (16 megahertz), thereby on the mode of operation of board units integral body, further reduce power consumption; 4) data communications method of board units of the present invention and system, matching module is when coupling wakeup frequency signal, the clock source of its timer is identical with the low dominant frequency of controller, has reduced power consumption on the one hand, the also convenient on the other hand square-wave cycle of calculating and judging the frequency signal that receives; 5) data communications method of board units of the present invention and system, matching module detects at least two square-wave cycle of wakeup frequency signal, thereby realizes the square-wave cycle of the wakeup frequency signal that accurate Calculation detects.
Description of drawings
Figure 1 shows that the hardware block diagram of the board units of present embodiment;
Fig. 2 has described the board units false wake-up matching process of present embodiment.
Embodiment
In conjunction with the accompanying drawings execution mode is described in further detail below by embodiment.
After deliberation, in the middle of the actual use of board units, main electric quantity consumption is not in arm's length dealing, but the false wake-up of board units, battery discharge variation under various conditions or the like reason.Wherein false wake-up is the one of the main reasons of battery power consumption.
According to national standard, board units adopts passive receiving mode, so waking up of board units must allow can both be waken up under a plurality of frequencies that GB requires.After waking up, the data of the roadside unit that the board units basis receives are judged the different frequent points in the roadside unit setting of adjacent lane, thereby avoid co-channel interference.Because waking up of board units is that wideband wakes up,, probably cause the false wake-up of board units therefore in theory in the more intense place of wireless communication signals.
In breadboard test, constantly adjust the signal strength signal intensity that sends signal by using signal source, detect board units at 900MHz, 800MHz, around the 2.4GHz frequency, can both be by false wake-up, at the frequency near the scope of 5GHz, then board units is easier of false wake-up.Find out the board units for broadband reception thus, the false wake-up phenomenon is comparatively general in using for a long time.The power consumption of the board units during therefore, by the reduction false wake-up can increase the useful life of board units.
The no-stop charging system of the reduction false wake-up that the present invention relates to comprises board units (OBU) and roadside unit (RSU).This board units comprises signal receiving unit, controller 10 and Data Receiving link 30.Signal receiving unit is that antenna 50 is used to receive the wakeup frequency signal in this example; Data Receiving link 30 after board units is waken up, by controller 10 be provided with the beginning and roadside unit carry out data communication; Controller 10 has the response frequency of setting, this controller 10 is connected with Data Receiving link 30 with signal receiving unit respectively, this controller 10 is used to judge whether the predefined response frequency of wakeup frequency signal and this board units mates, when this response frequency and wakeup frequency Signal Matching, control this Data Receiving link 30 and set up data communication with roadside unit.
Please refer to Fig. 1, the board units that the present invention relates to comprises IC chip (sign), controller 10 and as the antenna 50 of signal receiving unit.The controller of this board units is set response frequency.Wherein, the circuit cloth of this board units is made as: controller 10 with wake link 20 up and be connected, this controller 10 is connected with Data Receiving link 30 simultaneously, and the radio-frequency power supply switch 40 that is controlled by controller 10 is set on this Data Receiving link 30.This controller 10 is judging that the wakeup frequency signal is the modulation signal of 14 KHz square waves, that is when mate with setpoint frequency, controls this radio-frequency power supply switch 40 and connect, otherwise control this radio-frequency power supply switch 40 disconnections.This controller 10 is opened radio-frequency power supply switch 40 when the modulation signal coupling of 14 KHz square waves of the wakeup frequency signal of judging reception and GB requirement, set up data communication with roadside unit.
In the present embodiment, this response frequency scope is that 12 KHz are to 16 KHz.
In this example, the vehicle that carries board units is away from the charge station of installing roadside unit the time, and board units is in low-power consumption mode.Vehicle ground the line of induction that starts roadside unit transmission wakeup frequency signal and data-signal near charge station the time.Roadside unit sends wakeup frequency signal and data-signal, and board units detects earlier and coupling wakeup frequency signal.
According to the specification requirement of national ETC non-parking charge, board units can be waken up by the data-signal that the modulation signal of the square wave of 14 KHz wakes also radio communication that can be by modulation up.In order to satisfy the wakeup frequency signal modulation requirement of board units to receiving, the square-wave modulation signal of this 14 KHz requires to be 15-17 square-wave cycle.
If board units is strict with the square wave wakeup frequency signal of 14 KHz that can only be modulated and is waken up, and when the wakeup frequency Signal Matching of modulation 14 KHz, reduce the purpose that power just can realize reducing the false wake-up power consumption as far as possible.
This controller 10 adopts low dominant frequency (1 megahertz) when matching module coupling wakeup frequency signal, this matching module is when coupling wakeup frequency signal, the low dominant frequency of the clock source of controller timer internal and 1 megahertz of controller is identical, and it is more easy to be arranged so that like this when calculating wakes square-wave cycle up.The power consumption of controller when therefore, matching module also is operated under the low dominant frequency with further reduction coupling.Simultaneously, the clock source of the timer of matching module is identical with the low dominant frequency of controller 10, has reduced power consumption on the one hand, the also convenient on the other hand square-wave cycle of calculating and judging the frequency signal that receives.
Reach the purpose that reduces the false wake-up rate and reduce power consumption, at first on hardware designs, guarantee that 14 KHz wakeup frequency signals can controlled device, that is single-chip microcomputer receives.In the present embodiment, controller can be realized the single-chip microcomputer that low-power consumption mode and normal mode switch.The quantity of the wakeup frequency signal that controller receives should reach some, so that controller can be modulated if having time, mates and handle.In this example, the circuit design of board units is to wake the coupling link up to separate design with the Data Receiving link, is linked on the controller respectively.Needing enough soon waking response up of controller is so that can in time receive the wakeup frequency signal.Controller in this example does not need other devices to cooperate except that controller fully, thereby has reduced power consumption when waking coupling up.
Based on the hardware designs of above-mentioned board units, board units depends primarily on the power consumption of waking coupling up in the power consumption of waking up.When whether the method matching judgment of using single-chip microcomputer by software was 14 KHz wakeup frequency signals, the single-chip microcomputer power consumption was exactly the whole power consumptions of board units when waking up.In this example, the whole power consumptions when waking up comprise the power consumption of waking link up and the power consumption of single-chip microcomputer (that is controller).The power consumption of waking link up is very low, is negligible.Usually power consumption and its work dominant frequency of single-chip microcomputer are proportional, therefore allow single-chip microcomputer be operated in the extremely low frequency that satisfies 14 KHz wakeup frequency Signal Matching, just can reach the purpose that reduces power consumption.
Experiment showed, at controller 10 to be operated under the situation that dominant frequency is 1 megahertz, is the coupling that can finish 14 KHz wakeup frequency signals.Usually power consumption is greatly about hundred micromicroampere ranks under the dominant frequency of 1 megahertz for controller 10, and power consumption is lower, the battery consumption in the time of can reducing false wake-up greatly.Coupling for 14 KHz wakeup frequency signals, can also select lower dominant frequency, but consider the adding that wakes coupling up, can not influence actual transaction, promptly after adding the wakeup frequency Signal Matching, can not make the scope of transaction be restricted, still will keep original trading range constant.Have certain fluctuation when therefore receiving owing to wireless signal, on the scope of mating, that just can not limit is very strict.And the too low meeting of dominant frequency causes coupling too strict, and therefore through practical proof, the dominant frequency of 1 megahertz is comparatively suitable.
In this example, this controller 10 nontransaction (that is, board units is not near period of roadside unit, this moment, board units was in resting state) time be in low-power consumption mode (Low Power Mode3, LPM3), this controller with roadside unit set up data communication when transaction adopt operate as normal than high primary frequency (16 megahertz), thereby on the mode of operation of board units integral body, further reduce power consumption.
The data communications method of the board units that relates in this example roughly may further comprise the steps:
The controller of board units is set response frequency;
The controller of this board units when the response frequency coupling of wakeup frequency signal that receives and setting and roadside unit set up data communication.
The data communications method of board units in this example, its prerequisite are the controller 10 strict response frequencies that limit of board units; The controller 10 of this board units is just set up data communication with roadside unit when the response frequency coupling of wakeup frequency signal that receives and setting.Therefore, other communication data signal and undesirable wakeup frequency signal all can't active controller and roadside unit set up data communication, greatly reduced the false wake-up rate of board units, reduced unnecessary power consumption.
The coupling thinking of this 14 KHz wakeup frequency signal is the clock width by the square-wave cycle of number wakeup frequency signal, thereby calculates the square-wave cycle of wakeup frequency signal.Because the wakeup frequency signal when the match responding frequency, does not have the phase place difference because it is a square wave itself, promptly begin all should be 14 KHz one number time from that saltus step, therefore just fairly simple on the judgement coupling.
Realize that emphasis is mainly as follows:
1) wakes the matching precision problem of square wave up about 14 KHz.For more accurate coupling, be set in and mated two complete all after dates and get timer counting, divided by 2 square-wave cycle that are detected wakeup frequency signal.If counting satisfies the time conditions that two 14 KHz are waken square wave up, whether the square-wave cycle numerical value that draws the wakeup frequency signal after promptly timer calculates is around 73 microseconds.If the wakeup frequency signal satisfies 14 KHz response frequency conditions of match settings, in this example, satisfy in the scope of 63 microseconds to 83 microseconds.
2), illustrate to detect continuous two square-wave cycle if number of transitions reaches 4 times.
3) after board units is waken up, controller 10 begins the wakeup frequency signal that will receive and the predefined response frequency of controller of board units is mated.Because signal is through airborne spread and radio frequency link demodulation, and problem such as other device precision, can make the square wave frequency that wakes up that obtains have some errors.Be to judge whether the wakeup frequency signal drops within the scope of setting response frequency 12-16 KHz in this example.
4) wake when coupling in cycle of square wave up when 14 KHz of receiving, controller 10 at first is set to be operated under the low dominant frequency, this example is 1 megahertz, saved the power consumption of controller so as much as possible, actual in the complicated and simple dominant frequency that is provided with of software algorithm, so that do not influence the sensitivity that wakes up of board units, thereby can not influence the real work of board units because this function introduces.The timer clock source is set then, and the clock source of this timer is operation clock 1 megahertz of controller, and promptly the dominant frequency with controller is identical.Then begin the square wave coupling of wakeup frequency signal.
5) about the setting of time-out time in matching process.Because 14 KHz square wave times of match-on criterion approximately are 73 microseconds, so time-out time is set to hundred microseconds and gets final product.
The specific implementation process please refer to Fig. 2, and the idiographic flow of matching module is as follows:
The signal receiving unit of board units, antenna 50 receives the wakeup frequency signal, and sends into controller 10 by waking link 20 up.
Step S201. controller 10 receives that the wakeup frequency signal is waken up, that is board units is waken up, and controller 10 enters the activated state operation.Have only controller 10 to be in power-up state this moment, and other circuit still keep closing electricity condition.Controller 10 being set operating in low dominant frequency mode of operation, is 1 megahertz in this example.
Step S202. circular test controller 10 with wake link-attached signal pin level up whether saltus step arranged, judge whether overtime when beginning to count transition times when saltus step is arranged or not having saltus step.And in the overtime process of matching well that withdraws from.Because 14 KHz square wave times of match-on criterion approximately are 73 microseconds, so time-out time is set to hundred microseconds and gets final product.
When (1) detecting saltus step, promptly forward step S203 to.
(2) when at the appointed time (this example is 200 microseconds) all do not detect saltus step, and promptly explanation is a false wake-up, forwards step S207 to.
If step S203. has saltus step, then zero clearing timer when detecting saltus step for the first time, and opening entry number of transitions.Change step S204 over to.
The saltus step of step S204. continuous detecting is also counted., arrives counting step S205 if reaching 4 times.Otherwise, get back to step S202.
The 14 KHz response frequencies that the square-wave cycle of continuous two the wakeup frequency signals of step S205. and controller are set have been mated.Illustrate that what receive is the correct square wave that wakes up, program running is to step S206.Otherwise think that it fails to match, enter step S207.
Step S206. is provided with the frequency that controller 10 enters operate as normal, this example is 16 megahertzes, be provided with each pin input/output state and initial output level, the timer clock source is set and opens and open the radio frequency link power supply by radio-frequency power supply switch 40.The beginning operate as normal.
Step S207. thinks that board units is a false wake-up, enters resting state for energy-conservation energy consumption is provided with controller 10 at once, changes low-power consumption mode over to.
In the present embodiment, two places that have superiority are arranged:
On the one hand be to wake Data Receiving link and board units up the link branch on the hardware circuit design to be arranged, this realizes the wake-up signal coupling of 14 KHz for software condition is provided under the prerequisite of only waking link work up, only in this way just can play purpose of power saving, because the higher needs of Data Receiving link performance power up operation, just log-on data receives after determining correctly to be waken up, can avoid powering up because of false wake-up this part power consumption of operation fully.
Be software on the other hand in realizing 14 KHz matching processs, used low dominant frequency, 1 megahertz of present embodiment has further reduced the power consumption of board units.
Above content be in conjunction with concrete execution mode to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. the data communications method of a board units is characterized in that comprising:
Board units receives the wakeup frequency signal;
Board units judges whether wakeup frequency signal and the predefined response frequency of board units mate;
When the response frequency of described board units and wakeup frequency Signal Matching, described board units and roadside unit are set up data communication.
2. the data communications method of board units according to claim 1, it is characterized in that: described board units comprises controller, described controller adopts low-power consumption mode when nontransaction, described controller adopts low dominant frequency when coupling wakeup frequency signal, described controller is converted to high primary frequency when setting up the data communication transaction with roadside unit.
3. the data communications method of board units according to claim 2 is characterized in that: described controller is when coupling wakeup frequency signal, and the dominant frequency that is used to calculate the clock source of timer of wakeup frequency signal period and controller is identical.
4. the data communications method of board units according to claim 3, it is characterized in that: the scope of described response frequency is set at the 12-16 KHz, the controller of board units detects and the cycle of calculating the wakeup frequency signal, when the wakeup frequency cycle of calculating dropped in the periodic regime of setting response frequency, the match is successful.
5. board units is characterized in that comprising:
Signal receiving unit is used to receive the wakeup frequency signal;
The Data Receiving link is used for setting up data communication with roadside unit;
Controller, described controller is connected with the Data Receiving link with signal receiving unit respectively, described controller is used to judge whether the predefined response frequency of wakeup frequency signal and described board units mates, when described response frequency and wakeup frequency Signal Matching, control described Data Receiving link and roadside unit and set up data communication.
6. board units according to claim 5, it is characterized in that: be connected with the radio-frequency power supply switch between described controller and the Data Receiving link, described controller is controlled described radio-frequency power supply switch connection when response frequency and wakeup frequency Signal Matching, disconnect otherwise control described radio-frequency power supply switch.
7. according to claim 5 or 6 described board units, it is characterized in that: adopt the controller of low-power consumption mode when coupling wakeup frequency signal, to adopt low dominant frequency when nontransaction, when setting up the data communication transaction, adopt high primary frequency with roadside unit.
8. board units according to claim 7 is characterized in that: described controller is when coupling wakeup frequency signal, and the dominant frequency that is used to calculate the clock source of timer of wakeup frequency signal period and controller is identical.
9. board units according to claim 8, it is characterized in that: described controller is used to detect at least two square-wave cycle of wakeup frequency signal, described controller also is used to calculate the cycle of wakeup frequency signal, the scope of described response frequency is set at the 12-16 KHz, when the wakeup frequency cycle of calculating dropped in the periodic regime of setting response frequency, the match is successful.
10. no-stop charging system that reduces power consumption, comprise as each described board units and roadside unit in the claim 5 to 9, described board units when the response frequency coupling of wakeup frequency signal that receives and setting and roadside unit set up data communication.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910188547.8A CN102082587B (en) | 2009-12-01 | 2009-12-01 | Data communication method and system of vehicle-mounted unit |
| EP10834174.4A EP2503710B1 (en) | 2009-12-01 | 2010-06-21 | Electronic toll collection system, on-board unit and data communication method for on-board unit |
| PCT/CN2010/074179 WO2011066741A1 (en) | 2009-12-01 | 2010-06-21 | Electronic toll collection system, on-board unit and data communication method for on-board unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910188547.8A CN102082587B (en) | 2009-12-01 | 2009-12-01 | Data communication method and system of vehicle-mounted unit |
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| Publication Number | Publication Date |
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| CN102082587A true CN102082587A (en) | 2011-06-01 |
| CN102082587B CN102082587B (en) | 2015-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910188547.8A Expired - Fee Related CN102082587B (en) | 2009-12-01 | 2009-12-01 | Data communication method and system of vehicle-mounted unit |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2503710B1 (en) |
| CN (1) | CN102082587B (en) |
| WO (1) | WO2011066741A1 (en) |
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| CN103793944A (en) * | 2012-10-30 | 2014-05-14 | 山东搜宇信息科技有限公司 | On board unit wake-up circuit and wake-up method thereof |
| WO2014075548A1 (en) * | 2012-11-15 | 2014-05-22 | 电信科学技术研究院 | Method and device for data broadcast control and data broadcast in vehicle network |
| CN104217229A (en) * | 2013-06-04 | 2014-12-17 | 深圳市金溢科技股份有限公司 | High arousal sensitivity card, OBU, OBU component and communication method |
| CN104217229B (en) * | 2013-06-04 | 2017-06-16 | 深圳市金溢科技股份有限公司 | Height wakes up sensitivity card, OBU, OBU component and communication means |
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| CN104348482A (en) * | 2013-08-05 | 2015-02-11 | 博通集成电路（上海）有限公司 | Circuit, device and method of circuit |
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| CN108038924A (en) * | 2017-12-08 | 2018-05-15 | 北京云星宇交通科技股份有限公司 | A kind of method and system for preventing compound visa card by false wake-up |
| CN109934943A (en) * | 2017-12-19 | 2019-06-25 | 北京聚利科技股份有限公司 | The method and apparatus for reducing OBU power consumption |
| CN108711197A (en) * | 2018-05-24 | 2018-10-26 | 北京握奇智能科技有限公司 | The method and apparatus that a kind of power to board units is adaptively adjusted |
| CN108711197B (en) * | 2018-05-24 | 2021-09-17 | 北京握奇智能科技有限公司 | Method and equipment for adaptively adjusting power of vehicle-mounted unit |
| CN111417095A (en) * | 2020-03-27 | 2020-07-14 | 深圳复芯微科技有限公司 | Low-power-consumption communication method, device and equipment |
| CN112738768A (en) * | 2020-12-22 | 2021-04-30 | 北京万集科技股份有限公司 | Vehicle-mounted system and communication method thereof |
| CN112738768B (en) * | 2020-12-22 | 2024-01-12 | 三川在线(杭州)信息技术有限公司 | Vehicle-mounted system and communication method thereof |
| CN113365224A (en) * | 2021-06-03 | 2021-09-07 | 星觅(上海)科技有限公司 | Method, device and equipment for detecting vehicle passing abnormity and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2503710B1 (en) | 2018-09-05 |
| EP2503710A4 (en) | 2014-12-31 |
| CN102082587B (en) | 2015-05-20 |
| WO2011066741A1 (en) | 2011-06-09 |
| EP2503710A1 (en) | 2012-09-26 |
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