CN109934943A - The method and apparatus for reducing OBU power consumption - Google Patents
The method and apparatus for reducing OBU power consumption Download PDFInfo
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- CN109934943A CN109934943A CN201711378594.XA CN201711378594A CN109934943A CN 109934943 A CN109934943 A CN 109934943A CN 201711378594 A CN201711378594 A CN 201711378594A CN 109934943 A CN109934943 A CN 109934943A
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Abstract
The present invention provides a kind of method and apparatus for reducing OBU power consumption.This method comprises: control card reading chip reads user's card information；The read functions of the card reading chip are closed in control；Control display shows the cost information generated according to user's card information.Before this method can make display show cost information, MCU is just closed the read functions of card reading chip, therefore, during the entire process of display shows cost information, the card-reading function of card reading chip is in close state, the lower power consumption of card reading chip, so that OBU Overall Power Consumption reduces.
Description
Technical field
The present invention relates to the communication technology more particularly to a kind of method and apparatus for reducing OBU power consumption.
Background technique
Electronic toll collection (Electronic Toll Collection, abbreviation ETC) is more advanced at present
Toll on the road and bridge's mode；The system is the on board unit (On Board Unit, abbreviation OBU) and charge by being installed on vehicle
The microwave special short-range communication stood between the drive test unit (Road Side Unit, abbreviation RSU) set up on the lane ETC, and
Computer Networking and bank carry out the processing mode of backstage clearing, reach vehicle by being not required to parking when toll on the road and bridge station i.e.
The purpose of road and bridge expense can be paid.Currently, OBU adds solar battery to be powered using lithium battery, the service life of battery is that have
Limit, in order to during limited service life, increase the number that OBU completes transaction, the power consumption for reducing OBU is even more important.
In the prior art, OBU shows subscriber card remaining sum after completing transaction, when the display time reaches 1 second, control
OBU complete machine processed enters suspend mode, and then reduces the power consumption of OBU complete machine.
But OBU, during showing subscriber card remaining sum, OBU complete machine is still within working condition, and power consumption is larger.
Summary of the invention
The present invention provides a kind of method and apparatus for reducing OBU power consumption, to reduce OBU Overall Power Consumption.
In a first aspect, the present invention provides a kind of method for reducing OBU power consumption, comprising:
It controls card reading chip and reads user's card information；
The read functions of the card reading chip are closed in control；
Control display shows the cost information generated according to user's card information.
Optionally, it before the cost information generated according to user's card information is shown in above-mentioned control display, also wraps
It includes:
Determine that two-way authentication is completed between OBU and RSU；
Control stops powering to embedded safe control module ESAM.
Optionally, after above-mentioned control stops powering to embedded safe control module ESAM, further includes:
The working frequency of control adjustment micro-control unit MCU, before the corresponding power consumption of working frequency adjusted is less than adjustment
The corresponding power consumption of working frequency.
Optionally, two-way authentication completion includes: between above-mentioned determining OBU and RSU
Receive the encrypted authentication request that the RSU is sent；
It controls ESAM and encryption authentication operation is carried out according to the encrypted authentication request；
The encryption authentication response that ESAM is returned is sent to the RSU, the encryption authentication response is used to indicate OBU and RSU
Between two-way authentication whether complete.
Optionally, above-mentioned subscriber card information includes basic data file, the compound consumption file of networking and stored value card file.
Second aspect, the present invention provide a kind of device for reducing OBU power consumption, comprising:
Control module reads user's card information for controlling card reading chip；
The control module is also used to control the read functions for closing the card reading chip；
The control module is also used to control display and shows the cost information generated according to user's card information.
Optionally, described device further include: determining module；
The determining module is used to show the expense generated according to user's card information in control module control display
Before information, determine that two-way authentication is completed between OBU and RSU；
The control module is also used to control stopping and powers to embedded safe control module ESAM.
Optionally, the control module is also used to stop in control to after ESAM power supply, control adjustment micro-control unit
The working frequency of MCU, the corresponding power consumption of working frequency adjusted is less than adjust before the corresponding power consumption of working frequency.
Optionally, described device further include: receiving module and sending module；
The receiving module is used to receive the encrypted authentication request that the RSU is sent；
The control module is specifically used for control ESAM and carries out encryption authentication operation according to the encrypted authentication request；
The sending module is used to send the encryption authentication response that ESAM is returned, the encryption authentication response to the RSU
It is used to indicate whether the two-way authentication between OBU and RSU is completed.
Optionally, the subscriber card information includes basic data file, the compound consumption file of networking and stored value card file.
The method provided by the invention for reducing OBU power consumption, the MCU in OBU read subscriber card letter by control card reading chip
Breath, then the card-reading function of card reading chip is closed in control, is finally controlled display and is shown the expense generated according to user's card information
Information, so that MCU is just closed the read functions of card reading chip before display shows cost information, therefore, aobvious
During the entire process of showing that device shows cost information, the card-reading function of card reading chip is in close state, the power consumption drop of card reading chip
It is low, so that OBU Overall Power Consumption reduces.
Detailed description of the invention
Fig. 1 is a kind of application scenario diagram of the method provided by the invention for reducing OBU power consumption；
Fig. 2 is another application scenario diagram of the method provided by the invention for reducing OBU power consumption；
Fig. 3 is the flow chart of the embodiment one of the method provided by the invention for reducing OBU power consumption；
Fig. 4 is the flow chart of the embodiment two of the method provided by the invention for reducing OBU power consumption；
Fig. 5 is the flow chart of the embodiment three of the method provided by the invention for reducing OBU power consumption；
Fig. 6 is the flow chart of the example IV of the method provided by the invention for reducing OBU power consumption；
Fig. 7 is the structural schematic diagram of the embodiment one of the device provided by the invention for reducing OBU power consumption.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistented with the present invention.On the contrary, they be only with it is such as appended
The example of device and method being described in detail in claims, some aspects of the invention are consistent.
Noun according to the present invention is explained first:
Electronic toll collection (Electronic Toll Collection, abbreviation ETC): by being mounted on vehicle
OBU on windshield and the microwave special short-range communication between the RSU on the lane charge station ETC, utilize computer networking
Technology and bank carry out backstage settlement process, can pay road and bridge expense to reach vehicle and be not required to parking by toll on the road and bridge station
Purpose.
Embedded safe control module (Embedded Secure Access Module, abbreviation ESAM): dual inline type
Encapsulation technology (Dual Inline-pin Package, abbreviation DIP) or S.O.P. (Standard Operating
Procedur, abbreviation SOP) chip package central processing unit (Central Processing Unit, abbreviation CPU) card chip.
Non-contact IC card: also known as radio-frequency card is made of IC chip and induction antenna, is encapsulated in the polychlorostyrene second an of standard
In alkene (Polyvinyl chloride, abbreviation PVC) card, chip and antenna are without any exposed parts.
Currently, OBU generallys use lithium battery and solar cell for supplying power, the service life of battery is limited, in order to limited
Service life during, increase OBU complete transaction number, the power consumption for reducing OBU, which seems, to be even more important.Pass through in the prior art
Following methods reduce OBU power consumption: after OBU has read user's card information, the balance information in user's card information being shown, is shown
After showing that the time is more than 1s, OBU complete machine is switched into suspend mode immediately, to achieve the purpose that reduce OBU power consumption.But upper
It states during the balance information in user's card information shows, OBU complete machine is still in running order；That is, above-mentioned
In the display time of 1s, OBU is still within high power consumption state；The method for this reduction OBU power consumption that the prior art provides is not
It is ideal.The present invention provides a kind of method and apparatus for reducing OBU power consumption, can be in the balance information in above-mentioned user's card information
During display, OBU Overall Power Consumption is further decreased.
Fig. 1 is a kind of application scenario diagram of the method provided by the invention for reducing OBU power consumption；As shown in Figure 1, vehicle is from height
Fast highway A mouthfuls of the channel ETC enters highway, is driven out to highway from B mouthfuls of the channel ETC；A mouthfuls of corresponding information are entrance
Information, B mouthfuls of corresponding information are outlet information.Optionally, above-mentioned highway is also possible to tunnel and bridge etc., the present embodiment
It does not limit this.
Fig. 2 is another application scenario diagram of the method provided by the invention for reducing OBU power consumption；Scene shown in Fig. 1
Under, as shown in Fig. 2, the ETC system in the channel ETC includes: OBU, RSU and lane computer, wherein OBU passes through microwave wireless chain
Road is communicated with RSU；RSU and lane computer by cable connection with communicate, lane computer is used to calculate vehicle pass-through
Expense and control automatic railing fall and lift etc. operation.
Each embodiment of the subsequent offer of the present invention can be applied in above-mentioned scene.Below with specifically embodiment to this hair
How the technical solution of bright technical solution and the application, which solves above-mentioned technical problem, is described in detail.These have below
The embodiment of body can be combined with each other, and the same or similar concept or process may be repeated no more in certain embodiments.
Below in conjunction with attached drawing, the embodiment of the present invention is described.
Fig. 3 is the flow chart of the embodiment one of the method provided by the invention for reducing OBU power consumption, as shown in figure 3, this implementation
The method of reduction OBU power consumption that example provides may include:
Step 101, control card reading chip read user's card information.
Optionally, before user's vehicle enters highway from the channel ETC of entrance A, subscriber card need to be inserted into the card of OBU
In slot, the micro-control unit (Microcontroller Unit, abbreviation MCU) in OBU, which senses, subscriber card in the card slot of OBU
In the case where insertion, card reading chip can control to read user's card information.
Optionally, above-mentioned user's card information can be basic data file, the compound consumption file of networking and stored value card text
Part etc..
Optionally, when user's vehicle is driven out to highway from the channel ETC of outlet B, lane computer can be according to user's vehicle
The information of entrance A deducts corresponding run cost；Remaining sum can change therewith in subscriber card, and at this moment MUC also can control and read
Card chip reads user's card information.
Wherein, the mountable position that can be communicated with RSU realization any on vehicle OBU can optionally install OBU
On the front windshield of vehicle；Optionally, subscriber card can be non-contact IC card.
Step 102, control close the read functions of the card reading chip.
Wherein, since the card reading chip in OBU is after having read the information on subscriber card, again trigger read operation it
Before, there will not be any operation to subscriber card again；At this point, the read functions of card reading chip are closed in MCU control, card reading chip just will not
It is further continued for reading user's card information；Since the read functions of card reading chip are closed, so that the lower power consumption of card reading chip, thus
So that OBU Overall Power Consumption reduces.
For example, before user's vehicle enters highway by the channel ETC of entrance A, by the card of subscriber card insertion OBU
In slot, in the case that MCU senses the card slot that user's card insertion enters OBU, starts to control card reading chip reading user's card information, read
After card chip has read user's card information, sends to read to MCU and complete message, the reading that MCU is connected to the transmission of card reading chip is complete
After message, the read functions of card reading chip are immediately closed off, optionally, MCU can send the instruction for stopping reading to card reading chip,
So that card reading chip stops executing read operation.Due to being read function immediately after card reading chip has read user's card information
It can be carried out closing, so that the lower power consumption of card reading chip, so that OBU Overall Power Consumption reduces.
For another example, when user's vehicle is driven out to highway from the channel ETC of outlet B, lane computer can be according to user's vehicle
The information of entrance A deducts corresponding run cost；Remaining sum changes therewith in subscriber card, and card reading chip is to updated user
Card information is read out, and after card reading chip has read user's card information, is sent to read to MCU and is completed message, MCU is connected to card reading
After message is completed in the reading that chip is sent, the read functions of card reading chip are immediately closed off, the power consumption of card reading chip can equally dropped
It is low.
Step 103, control display show the cost information generated according to user's card information.
Since card reading chip has been read user's card information in step 101, in order to enable user can know use
Cost information inside the card of family, MCU can generate cost information according to user's card information, and control display and show the cost information
It shows and, the information such as the current balance in subscriber card are known convenient for user.
Optionally, above-mentioned control display show cost information the display time can according to user demand sets itself, by
In this present embodiment before display shows cost information, MCU is just closed the read functions of card reading chip, because
This, during the entire process of display shows cost information, the card-reading function of card reading chip is in close state, card reading chip
Lower power consumption, so that OBU Overall Power Consumption reduces.
The method provided in this embodiment for reducing OBU power consumption, the MCU in OBU read subscriber card by control card reading chip
Information, then the card-reading function of card reading chip is closed in control, is finally controlled display and is shown the expense generated according to user's card information
With information, so that MCU is just closed the read functions of card reading chip before display shows cost information, therefore,
During the entire process of display shows cost information, the card-reading function of card reading chip is in close state, the power consumption of card reading chip
It reduces, so that OBU Overall Power Consumption reduces.
User's vehicle enters highway by entrance A, and when being driven out to highway by exporting B, lane computer is wanted
Corresponding run cost is calculated according to the information of entrance A, in OBU by user's card information of the information comprising entrance A read
It is sent to before RSU, OBU needs to carry out two-way authentication with RSU, and the process of the two-way authentication needs the participation of ESAM, and ESAM
Belong to one of biggish device of power consumption in OBU, the power consumption for controlling ESAM is most important.
Fig. 4 is the flow chart of the embodiment two of the method provided by the invention for reducing OBU power consumption, in order to reduce the function of ESAM
Consumption, and then reduce OBU Overall Power Consumption, on the basis of above-mentioned embodiment illustrated in fig. 3, reduction OBU power consumption provided in this embodiment
Method can also include: before step 103
Step 201 determines that two-way authentication is completed between OBU and RSU.
Wherein, user's vehicle enters highway from entrance A, and when being driven out to highway from outlet B, lane computer is wanted
Corresponding run cost is calculated according to the information of entrance A, in order to guarantee the safety of user's card information, OBU sends user to RSU
Before card information, two-way authentication is carried out between the ESAM and RSU in OBU.Optionally, after two-way authentication is completed, ESAM can
The completed message of two-way authentication is sent to MCU, after MCU receives the message, sends the information comprising entrance A to RSU
User's card information；And then lane computer calculates according to the information of entrance A and deducts corresponding run cost.
Step 202, control stop embedded safe control module ESAM power supply.
Wherein, after the completion of due to two-way authentication between OBU and RSU, the function of ESAM has been completed, and is terminated from this transaction
To before transaction next time, OBU will not operate ESAM, at this point, the MCU control in OBU stops powering to ESAM, optionally, MCU can
After the completed message of two-way authentication for receiving ESAM transmission, stop powering to ESAM immediately.By in this present embodiment
Before display shows cost information, MCU just controls stopping and powers to ESAM, therefore, during display display, ESAM
In off-position, thus the lower power consumption of ESAM, so that OBU Overall Power Consumption reduces.
The method provided in this embodiment for reducing OBU power consumption, implementing principle and technical effect are similar with implementing one, in reality
On the basis of applying example one, by determining, two-way authentication is completed between OBU and RSU；And it controls stopping and controls mould to embedded-type security
Block ESAM power supply, so that ESAM has just been carried out power down process by MCU, therefore, in display before display shows cost information
During the entire process of showing cost information, ESAM is in off-position, thus the lower power consumption of ESAM, so that OBU complete machine
Lower power consumption.
The basic frequency of MCU is higher in OBU, and the speed that MCU handles data is faster, correspondingly, the power consumption of OBU complete machine is bigger,
Rationally control MCU dominant frequency has a major impact to OBU Overall Power Consumption is reduced.
Fig. 5 is the flow chart of the embodiment three of the method provided by the invention for reducing OBU power consumption, in order to further decrease
The power consumption of OBU complete machine, on the basis of above-mentioned embodiment illustrated in fig. 4, the method provided in this embodiment for reducing OBU power consumption,
After step 202, further includes:
The working frequency of step 301, control adjustment micro-control unit MCU, the corresponding small power consumption of working frequency adjusted
The corresponding power consumption of working frequency before adjusting.
Optionally, MCU controls card reading chip and closes card-reading function, and mutual authentication process is completed between OBU and RSU,
Control stops that the working frequency of MCU 2MHZ can be reduced to after ESAM power supply；Since the basic frequency of MCU in OBU is lower, OBU
The power consumption of complete machine decreases.By before display shows cost information, working frequency is just down to by MCU in this present embodiment
Preset value, therefore, during display display, the working frequency of MCU is in lower value, so that OBU Overall Power Consumption drops
It is low.
The method provided in this embodiment for reducing OBU power consumption, implementing principle and technical effect are similar with implementing two, in reality
On the basis of applying example two, by control adjustment micro-control unit MCU working frequency so that display show cost information it
Before, MCU just reduces working frequency, therefore, during the entire process of display shows cost information, at the working frequency of MCU
In lower value, so that OBU Overall Power Consumption reduces.
Fig. 6 is the flow chart of the example IV of the method provided by the invention for reducing OBU power consumption, and Fig. 6 is reality shown in Fig. 4
On the basis of applying example, further to a kind of description of possible implementation of the step 201 in Fig. 4, as shown in fig. 6, this
The method of reduction OBU power consumption that embodiment provides may include:
Step 401 receives the encrypted authentication request that the RSU is sent；
Optionally, a connection password can be preset in RSU, then sends encrypted authentication request, encryption certification to OBU
Request is for requesting OBU to input above-mentioned connection password.
Step 402, control ESAM carry out encryption authentication operation according to the encrypted authentication request；
Optionally, after the MCU in OBU receives above-mentioned encrypted authentication request, control ESAM is asked according to encryption certification
It asks and carries out encryption authentication operation, is i.e. input connection password.
Step 403, Xiang Suoshu RSU send the encryption authentication response that ESAM is returned, and the encryption authentication response is used to indicate
Whether the two-way authentication between OBU and RSU is completed.
Wherein, if ESAM has input correct connection password, MCU returns to encryption authentication response to RSU, and encryption certification is rung
Two-way authentication should be carried and complete message, after RSU receives the response, send subscriber card information acquisition request to MCU；MCU will include
User's card information of the information of entrance A is sent to RSU, and lane computer can be calculated according to the information for the entrance A that RSU is received
With the corresponding run cost of deduction；If the connection password mistake of ESAM input, MCU is into the encryption authentication response that RSU is returned
The message of authentification failure is carried, lane computer just can not carry out operation of deducting fees, and user need to be transferred to manual toll collection lane and pass through.
The method provided in this embodiment for reducing OBU power consumption, implementing principle and technical effect are similar with embodiment two,
On the basis of embodiment two, then the encrypted authentication request sent by receiving the RSU controls ESAM and is recognized according to the encryption
Card request carries out encryption authentication operation；And then encryption authentication response is sent to the RSU, so that OBU is sending subscriber card to RSU
Before information, two-way authentication is carried out between elder generation and RSU, ensure that the safety of user's card information.
Fig. 7 is the structural schematic diagram of the embodiment one of the device provided by the invention for reducing OBU power consumption, as shown in fig. 7, this
The device for the reduction OBU power consumption that embodiment provides, comprising: control module 10.
The control module 10 reads user's card information for controlling card reading chip；
The control module 10 is also used to control the read functions for closing the card reading chip；
The control module 10 is also used to control display and shows the cost information generated according to user's card information.
Wherein, the subscriber card information includes basic data file, the compound consumption file of networking and stored value card file.
Control module 10 provided in this embodiment can be used for executing the technical solution of embodiment of the method shown in Fig. 3 as a result,
That the realization principle and technical effect are similar is similar for it, and details are not described herein again.
In order to reduce the power consumption of ESAM, and then OBU Overall Power Consumption is reduced, the dress provided in this embodiment for reducing OBU power consumption
It sets, further includes: determining module 11；
The determining module 11 is used to control display in control module 10 and show according to user's card information generation
Before cost information, determine that two-way authentication is completed between OBU and RSU；
The control module 10 is also used to control stopping and powers to embedded safe control module ESAM.
Determining module 11 and control module 10 provided in this embodiment can be used for executing the implementation of method shown in Fig. 4 as a result,
The technical solution of example, it is similar that the realization principle and technical effect are similar, and details are not described herein again.
In order to further decrease the power consumption of OBU complete machine, control module 10 provided in this embodiment, it may also be used for control adjustment
The working frequency of micro-control unit MCU, the corresponding power consumption of working frequency adjusted is less than adjust before the corresponding function of working frequency
Consumption.
Control module 10 provided in this embodiment can be used for executing the technical solution of embodiment of the method shown in Fig. 5 as a result,
That the realization principle and technical effect are similar is similar for it, and details are not described herein again.
In order to improve the safety of user's card information, the device provided in this embodiment for reducing OBU power consumption may also include and connect
Receive module 12 and sending module 13；
The receiving module 12 is used to receive the encrypted authentication request that the RSU is sent；
The control module 10 is specifically used for control ESAM and carries out encryption authentication operation according to the encrypted authentication request；
The sending module 13 is used to send the encryption authentication response that ESAM is returned to the RSU, and the encryption certification is rung
Whether completed applied to the two-way authentication between instruction OBU and RSU.
Sending module 13 provided in this embodiment, receiving module 12 and control module 10 can be used for executing Fig. 6 institute as a result,
Show the technical solution of embodiment of the method, it is similar that the realization principle and technical effect are similar, and details are not described herein again.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to of the invention its
Its embodiment.The present invention is directed to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are wanted by right
Book is asked to point out.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is only limited by appended claims
System.
Claims (10)
1. a kind of method for reducing OBU power consumption characterized by comprising
It controls card reading chip and reads user's card information；
The read functions of the card reading chip are closed in control；
Control display shows the cost information generated according to user's card information.
2. the method according to claim 1, wherein the control display is shown according to user's card information
Before the cost information of generation, further includes:
Determine that two-way authentication is completed between on board unit OBU and drive test unit R SU；
Control stops powering to embedded safe control module ESAM.
3. according to the method described in claim 2, it is characterized in that, the control stops to embedded safe control module ESAM
After power supply, further includes:
The working frequency of control adjustment micro-control unit MCU, the corresponding power consumption of working frequency adjusted are less than work before adjustment
The corresponding power consumption of frequency.
4. according to the method described in claim 2, it is characterized in that, between the determining on board unit OBU and drive test unit R SU
Two-way authentication is completed
Receive the encrypted authentication request that the RSU is sent；
It controls ESAM and encryption authentication operation is carried out according to the encrypted authentication request；
The encryption authentication response that ESAM is returned is sent to the RSU, the encryption authentication response is used to indicate between OBU and RSU
Two-way authentication whether complete.
5. method according to claim 1-4, which is characterized in that the subscriber card information includes master data text
Part, the compound consumption file of networking and stored value card file.
6. a kind of device for reducing OBU power consumption characterized by comprising
Control module reads user's card information for controlling card reading chip；
The control module is also used to control the read functions for closing the card reading chip；
The control module is also used to control display and shows the cost information generated according to user's card information.
7. device according to claim 6, which is characterized in that further include: determining module；
The determining module is used to show the cost information generated according to user's card information in control module control display
Before, determine that two-way authentication is completed between OBU and RSU；
The control module is also used to control stopping and powers to embedded safe control module ESAM.
8. device according to claim 7, which is characterized in that
The control module is also used to stop in control to after ESAM power supply, the work frequency of control adjustment micro-control unit MCU
Rate, the corresponding power consumption of working frequency adjusted is less than adjust before the corresponding power consumption of working frequency.
9. device according to claim 7, which is characterized in that further include: receiving module and sending module；
The receiving module is used to receive the encrypted authentication request that the RSU is sent；
The control module is specifically used for control ESAM and carries out encryption authentication operation according to the encrypted authentication request；
The sending module is used to send the encryption authentication response that ESAM is returned to the RSU, and the encryption authentication response is used for
Indicate whether the two-way authentication between OBU and RSU is completed.
10. according to the described in any item devices of claim 6-9, which is characterized in that the subscriber card information includes master data
File, the compound consumption file of networking and stored value card file.
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