CN104468784A - System and method for achieving vehicle-mounted unit software upgrade through DSRC interface - Google Patents
System and method for achieving vehicle-mounted unit software upgrade through DSRC interface Download PDFInfo
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- CN104468784A CN104468784A CN201410742011.7A CN201410742011A CN104468784A CN 104468784 A CN104468784 A CN 104468784A CN 201410742011 A CN201410742011 A CN 201410742011A CN 104468784 A CN104468784 A CN 104468784A
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F8/00—Arrangements for software engineering
- G06F8/60—Software deployment
- G06F8/65—Updates
Abstract
The invention relates to a system and method for achieving vehicle-mounted unit software upgrade through a DSRC interface. The method includes the steps that an upgrade terminal sends an upgrade query command to a vehicle-mounted unit through the DSRC interface; the vehicle-mount unit feeds the current version information of the vehicle-mounted unit back to the upgrade terminal; the upgrade terminal receives the feedback version information through the DSRC interface and judges whether the vehicle-mounted needs to be upgraded or not; the upgrade terminal determines whether to send the upgrade command and an upgrade data package to the vehicle-mounted unit or not according to the judgment result; the vehicle-mounted unit receives the upgrade command and the upgrade data package through the DSRC interface, and software upgrade is conducted. By means of the system and method, the unified upgrade interface can be provided for vehicle-mounted units of different models, and the safety of upgrade operation is guaranteed.
Description
Technical field
The present invention relates to ITS (Intelligent Transport System, intelligent transportation system) technical field, particularly relate to a kind of system and method by the software upgrading of DSRC Interface realization board units.
Background technology
Highway ETC (Electronic Toll Collection, electric non-stop toll) system adopts the mode of Dedicated Short Range Communications, (Dedicated Short Range Communication, be called for short DSRC) agreement to realize vehicle not stop by the noncash automatic fare collection system of freeway toll station.The traction equipment of ETC system mainly comprises vehicle carried electronic label (or board units, On-Board Unit, is installed on vehicle), roadside unit (Road Side Unit is called for short RSU, is positioned at above the lane in which the drivers should pay fees).When vehicle sails ETC track into, the antenna of roadside unit carries out DSRC with the board units being arranged on windshield and communicates, and completes billing operation according to result of communication, and controls track railing action.Whole process completes in a short period of time automatically, and vehicle can complete charge transaction without the need to stopping.
ETC system board units is installed to vehicle to be paid after user uses, and if there is situations such as design deficiency of product, ETC system upgradings, sometimes needs to upgrade to the software program of board units.Software program upgrading can reduce product cost, avoids product recall to bring time and cost allowance to user and equipment vendor, operator.The upgrading of China existing ETC board units there is no unified upgrading mode and data-interface, and lacks validation and the handling safety guarantee of upgrade data.Specifically, first, the special upgrade equipment that each board units manufacturer adopts is different, wired data interface is mostly adopted to upgrade, the structure of special upgrade equipment, the cable data hardware interface disunity of upgrading, the communication protocol that upgrading uses also is not quite similar, and thereby produces the great wasting of resources.Secondly, the use of each special upgrade equipment needs to carry out a large amount of staff trainings, brings larger burden to upgrade job.Finally, there is user in existing board units escalation process shortage data security pledge system or manufacturer is privately upgraded by wired data interface and changes the risk of board units software program.Along with ETC popularizing in the whole nation, existing ETC board units software program upgrading mode also cannot adapt to large-scale board units staging business demand.
Summary of the invention
Solve board units upgrading in prior art loaded down with trivial details, lose time, with the problem of human cost, to provide a kind of system and method by the software upgrading of DSRC Interface realization board units.
A kind of system by the software upgrading of DSRC Interface realization ETC board units that the embodiment of the present invention provides, comprises,
Board units, upgrading terminals;
Described upgrading terminals sends upgrading query statement by DSRC interface to described board units;
Described board units by this board units current version information feed back to upgrading terminals;
The version information of described upgrading terminals by feeding back described in DSRC interface, and judge that described board units is the need of upgrading;
Described upgrading terminals determines whether send upgrade command and upgrading data packet to described board units according to judged result;
Described board units, by upgrade command and upgrading data packet described in DSRC interface, carries out software upgrading.
An a kind of further aspect by DSRC Interface realization ETC board units software update system according to the embodiment of the present invention, described board units comprises processor, memory block, DSRC module and secure access module, wherein,
Described processor, for carrying out Digital Signal Processing and control;
Described DSRC module, for carrying out DSRC signal transmitting and receiving;
Described secure access module, carries out encryption and decryption calculating for storage key data;
Described memory block, comprises upgrading and controls resident element, application program unit and buffer area, and wherein said upgrading controls resident element and controls upgrading flow process according to upgrade command; Described application program unit performs described board units and carries out ETC transaction; Described buffer area is for storing the upgrading data packet received.Wherein, upgrading control resident element, application program unit and buffer area is all arranged in same memory chip.
A kind of another further aspect by DSRC Interface realization ETC board units software update system according to the embodiment of the present invention, it is read-only storage chip that described upgrading controls resident element.
A kind of another further aspect by DSRC Interface realization ETC board units software update system according to the embodiment of the present invention, described upgrading terminals comprises, processor, memory block, DSRC module and secure access module, wherein,
Described processor, for Digital Signal Processing and control;
Described DSRC module, for carrying out DSRC signal transmitting and receiving;
Described secure access module, carries out key data calculating for storage key data;
Described memory block comprises further, and upgrading control unit, for the control of updating operation; Data storage area, for storing upgrading data packet.
A kind of another further aspect by DSRC Interface realization ETC board units software update system according to the embodiment of the present invention, described upgrading terminals comprises, processor, memory block, DSRC module and wireless communication module, wherein,
Described processor, for Digital Signal Processing and control;
Described DSRC module, for carrying out DSRC signal transmitting and receiving;
Described wireless communication module, for communicating with background server, obtains upgrading data packet and encryption and decryption result of calculation;
Described memory block comprises further, and upgrading control unit, for the control of updating operation; Data storage area, for storing upgrading data packet.
The embodiment of the present invention additionally provides a kind of by DSRC Interface realization ETC board units method for upgrading software,
Upgrading terminals sends upgrading query statement by DSRC interface to board units;
Described board units by this board units current version information feed back to upgrading terminals;
The version information of described upgrading terminals by feeding back described in DSRC interface, and judge that described board units is the need of upgrading;
Described upgrading terminals determines whether send upgrade command and upgrading data packet to described board units according to judged result;
Described board units, by upgrade command and upgrading data packet described in DSRC interface, carries out software upgrading.
An a kind of further aspect by DSRC Interface realization ETC board units method for upgrading software according to the embodiment of the present invention, described board units carries out encryption and decryption to described upgrading query statement, upgrade command and upgrading data packet and calculates with the Information Security verifying described upgrading query statement, upgrade command and upgrading data packet.
A kind of another further aspect by DSRC Interface realization ETC board units method for upgrading software according to the embodiment of the present invention, controls resident element by the upgrading controlling upgrading flow process in board units and is positioned in read-only storage chip.
A kind of another further aspect by DSRC Interface realization ETC board units method for upgrading software according to the embodiment of the present invention, the comparative result of described upgrading terminals to upgrading data packet and described board units feedback carries out encryption and decryption calculating with the Information Security verifying described upgrading data packet and described comparative result.
A kind of another further aspect by DSRC Interface realization ETC board units method for upgrading software according to the embodiment of the present invention, described upgrading terminals and background server obtain upgrading data packet and encryption and decryption result of calculation.
By the method and system of the embodiment of the present invention, adopt DSRC interface as the unified interface of board units software upgrading, reduce upgrade cost; Updating operation is carried out, compatible all board units models by special DSRC command format; The legitimate verification of upgrading advance driving carrier unit and upgrading terminals equipment, ensures the safety of upgrade data and escalation process.
In the present invention, after upgrade software packet is audited by ETC system operator, be placed in the background system of upgrading terminals or ETC operator, the key that upgrade validation needs is controlled by ETC system operator, thus the data security in the integrality of guarantee upgrading data packet, legitimacy and escalation process.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below.In the accompanying drawings:
Fig. 1 is that the functional module of board units forms schematic diagram;
Fig. 2 is that the functional module of upgrading terminals equipment forms schematic diagram;
Fig. 3 is the flow chart by the upgrading of DSRC Interface realization ETC board units software program safety;
Fig. 4 is that the functional module of the upgrading terminals equipment of another kind of form forms schematic diagram;
Figure 5 shows that a kind of structural representation by DSRC Interface realization ETC board units software update system that the embodiment of the present invention provides;
Figure 6 shows that a kind of flow chart by DSRC Interface realization ETC board units method for upgrading software of the embodiment of the present invention.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly understand, below in conjunction with accompanying drawing, the embodiment of the present invention is described in further details.At this, schematic description and description of the present invention is for explaining the present invention, but not as a limitation of the invention.
Be illustrated in figure 5 a kind of structural representation by DSRC Interface realization ETC board units software update system that the embodiment of the present invention provides, comprise board units 501, upgrading terminals 502;
Described upgrading terminals sends upgrading query statement by DSRC interface to described board units;
Described board units by this board units current version information feed back to upgrading terminals;
The version information of described upgrading terminals by feeding back described in DSRC interface, and judge that described board units is the need of upgrading;
Described upgrading terminals determines whether send upgrade command and upgrading data packet to described board units according to judged result;
Described board units, by upgrade command and upgrading data packet described in DSRC interface, carries out software upgrading.
Wherein, the software and hardware version match checking of board units 501 and upgrading terminals 502 first two-way legitimate verification and board units 501 when upgrading; After being verified, upgrading terminals 502 sends to board units 501 by needing the encryption of the upgrade data of transmission; Board units 501 is decrypted after receiving upgrade data, completeness check, and updating operation; After having upgraded, board units 501 returns updating result confirmation response to upgrading terminals 502.
The functional module of the board units shown in Fig. 1 forms in schematic diagram, wherein memory block 102, and this part comprises upgrading and controls resident element 1021, application program unit 1022 and buffer area 1023, wherein,
Upgrading controls mode of operation and the operating state that resident element 1021 is responsible for judging according to upgrade command current vehicle-mounted end member.If ETC transaction or board units distribution instruction, then give application program unit 1022 by control, carry out corresponding ETC transaction or board units distribution work; If upgrade command, then carry out corresponding updating operation.When board units starts, first processor is accessed upgrading and is controlled resident element 1021 by its assigned operation content.
Application program unit 1022 is that board units carries out ETC transaction and the critical component of other non-cash transactions, and the application program of program upgrade mainly in application programs unit is upgraded;
Buffer area 1023 is data buffer storage spaces of board units region of memory, for storing the upgrading data packet or other application datas of buffer memory that receive.
The upgrading of board units controls resident element 1021, and application program unit 1022 and buffer area 1023 can be placed in same memory chip, or upgrading control resident element 1021 is placed in ROM chip separately.Upgrading controls resident element 1021 once write board units, and solidification is not allowed amendment as read-only zones; Application program unit 1022 region is that control is read-write, and buffer area 1023 is read-write regions.
The secure access module 104 of board units is made up of independently chip, vehicle information data and secure key data is write by ETC operator when board units installs distribution, this module is also referred to as ESAM (Embedded Security AccessModule, be called for short security module) module, there is key data and is responsible for encryption and decryption calculating.
The functional module of the upgrading terminals equipment shown in Fig. 2 forms in schematic diagram, comprise processor 201, memory block 202, DSRC module 203, secure access module 204, wherein memory block 202, this part comprises upgrading control unit 2021, realize the control flow of application program updating operation, comprise that the two-way legitimate verification of upgrading terminals equipment and board units, board units product type and software and hardware version confirm, upgrade data is encrypted and the function such as transmission; Data storage area 2022, data cached with other for storing packet to be upgraded.
Insert PSAM card in secure access module 204, PSAM card remains with root key data, can carry out encryption and decryption calculating to the board units of different model.
Be illustrated in figure 6 a kind of flow chart by DSRC Interface realization ETC board units method for upgrading software of the embodiment of the present invention.
Comprise step 601, upgrading terminals sends upgrading query statement by DSRC interface to board units.
Step 602, described board units by this board units current version information feed back to upgrading terminals.
Step 603, the version information of described upgrading terminals by feeding back described in DSRC interface, and judge that described board units is the need of upgrading.
Step 604, described upgrading terminals determines whether send upgrade command and upgrading data packet to described board units according to judged result.
Step 605, described board units, by upgrade command and upgrading data packet described in DSRC interface, carries out software upgrading.
Fig. 3 gives the flow chart by the upgrading of DSRC Interface realization ETC board units software program safety, and step is as follows:
Step 300, upgrade data loads.Upgrading data packet is supplied to ETC system operator by board units equipment vendor, and packet to be upgraded is stored in the data storage area of upgrading terminals equipment by ETC system operator, every a board units model correspondence upgrading data packet needing upgrading;
Step 301, upgrading terminals sends the downlink command waking board units up.Wake-up signal BST (Beacon Service Table, the beacon service table) form that this command format and ETC track roadside unit or issuing equipment wake board units up is consistent;
Step 302, board units returns self relevant information, be VST (Vehicle ServiceTable in DSRC agreement, vehicle service table), the key message (as information such as board units contract sequence number, physical address, issuing dates) of board units should be comprised in VST;
Step 303, upgrading terminals sends upgrading query statement to board units.
Upgrading terminals sends upgrading query statement to board units, after board units receives upgrade command, returns software version and hardware revision information.Upgrading terminals equipment is to board units product type and software and hardware version, and the contract sequence number of board units that returns in VST of step 302 judges its production batch and the need of upgrading.If need upgrading, then enter step 304 and upgrade; Otherwise enter step 310, release communication link, board units enters resting state;
Step 304, upgrading terminals equipment and board units carry out two-way legitimate verification.
Upgrading terminals sends the random data produced to board units, board units is to the unique encryption data returning response after its encryption, such as by the sequence number of car-mounted terminal, described random data is encrypted, upgrading terminals is encrypted checking according to the sequence number information of board units to it, after being verified, complete the unidirectional legitimate verification of upgrading terminals equipment to board units; Subsequently, board units returns random number to upgrading terminals, board units is handed down to after upgrading terminals encryption, such as by the sequence number of upgrading terminals, random number is encrypted, board units is encrypted checking by the sequence number of described upgrading terminals to described random data, after being verified, complete the legitimate verification of board units to upgrading terminals equipment.
After two-way legitimate verification passes through, upgrading terminals equipment enters step 305, carries out upgrading subsequent operation; Otherwise enter step 310, release communication link, board units enters resting state;
Step 305, upgrade data transmits.Upgrading data packet is by one or more of DSRC burst data transmission to board units, and each DSRC transmission all carries out frame completeness check, and verification can adopt CRC (Cyclic Redundancy Check, cyclic redundancy check (CRC) code) to verify.After every frame DSRC transfer of data, board units all returns the up responsive data frame finished receiving, if middle a certain frame data fail to receive correctly, then returns the uplink data frames receiving mistake, upgrading terminals retransmits downlink data frame again, until all data are all transmitted.
The data of upgrading data packet can be plaintext transmission, or encrypted transmission, by upgrading terminals equipment given transmission mode.If adopt ciphertext transmission upgrading data packet, there are two kinds of optional manner:
Cipher mode 1: the key of data encrypting and deciphering can adopt the ETC application encipher key that is pre-stored in the secure access module of board units or formulate other keys as application authorization key etc. by upgrading terminals equipment.This key data has write ETC security module when board units installs distribution, uses by special instruction;
Cipher mode 2: when at every turn upgrading, produces encryption key by upgrading terminals temporarily, before transmission upgrading data packet, is handed down to board units by special DSRC instruction, and the upgrading resident control program of board units is preserved and is decrypted after receiving packet.
The upgrading data packet that board units equipment vendor is supplied to ETC system operator can be expressly, is supplied to ETC operator after also can carrying out superencipher by board units equipment vendor.
Step 306, upgrading data packet integrity verification.After upgrade data is transmitted, the upgrading of board units controls TSR unit and carries out integrity verification to the data of the upgrading data packet in buffer area, returns the information that checking is correct after being verified.
Step 307, upgrade applications.The upgrading of board units controls TSR unit and is upgraded by the ROMPaq bag of buffer area, and upgrading has two kinds of modes: program substitute mode and program change method.
Program substitute mode is that upgrading data packet program is replaced original erasing application area, and original application program no longer exists.
Program change method is another memory space data of the upgrading data packet of data buffer area being put into application storage region, and by ETC trading function by the application program controlling of upgrading, original application program is as backup application, when the advantage of this method is to upgrade failed, original application program can be switched to and carry out ETC transaction, ensure the reliability of product.
Step 308, updating result responds.Board units returns updating result response to upgrading terminals equipment, if upgraded successfully, then enters step 310, release communication link, and board units enters resting state; Upgrade else if failure, then board units returns the failed type information of upgrading, makes mistakes, enter step 309 as data packet length is not inconsistent, decipher unsuccessfully or upgrades, and is again upgraded or stop upgrading by the decision of upgrading terminals equipment.
Step 309, upgrading terminals subsequent treatment.The Fail Type information that upgrading terminals equipment returns according to board units, determines again to upgrade or stop upgrading.If determine to stop upgrading, then enter step 310, release communication link, record upgrade information, board units enters resting state; If determine again to upgrade, then enter step 301, again upgrade, after repeatedly upgrading unsuccessfully, failure information will be recorded repeatedly and stop upgrading.
Step 310, upgrading terminals equipment issues release link instructions, and upgrading terminates.
Fig. 4 provides another kind of upgrading terminals apparatus-form of the present invention, in the diagram, upgrading data packet and safety compute are provided by ETC system backstage, upgrading terminals equipment only provides transmission channel, the data received by wireless communication module are sent to board units by DSRC interface, and the integrity verification of data and encryption and decryption complete between ETC background system and car-mounted terminal.The upgrading terminals equipment of Fig. 4 can adopt independently special equipment, or adopt smart mobile phone to add the mode of DSRC module, the latter by the application program in smart mobile phone as upgrading control unit, the wireless communication module of smart mobile phone and ETC system background communication obtain upgrade data, also processor can be realized by miscellaneous equipment in other embodiments, the effect of memory block (comprising data upgrading control unit wherein and data storage area) and wireless communication unit, such as panel computer, or the equipment such as the PDA of band communication function, the function of described upgrading terminals is realized by USB or micro USB interface or bluetooth approach and DSRC model calling.Upgrading flow process is identical with Fig. 3, does not repeat them here.
In order to clearer description implementation of the present invention, provide two embodiments of the present invention below.The upgrading terminals equipment built-in security module of first embodiment, as shown in Figure 2, transfer of data adopts clear-text way to structure.The upgrading terminals equipment of second embodiment adopts smart mobile phone to add the mode of DSRC module, and upgrade data is provided by ETC background system, adopts the mode expressly adding identifying code to transmit upgrade data.
embodiment 1:
Step 300, upgrade data loads.Upgrading data packet is pre-stored in the memory block of upgrading terminals equipment.
Step 301, upgrading terminals equipment sends the descending DSRC instruction of upgrading, and command format is BST signal.
Step 302, board units returns vehicle service table signal (VST), should comprise the key message (as board units contract sequence number, physical address, issuing date etc.) of board units in VST instruction.
Step 303, upgrading terminals sends upgrading query statement to board units, and this instruction adopts Transferchannel.rq command format, after board units receives upgrade command, returns Transferchannel.rs response.
TransferChannel.rq data frame format and implication example thereof are as following table:
In upper table, " 00D6810004 " is the instruction of reading model and version information." 0102 " is software version information to be upgraded, and " 0100 " is hardware revision information.
Board units contrasts software version to be upgraded and the software version of self, if version to be upgraded is up-to-date, then returns the reply that can upgrade, and the TransferChannel.rs data frame format returned and implication example thereof are as following table:
In upper table, the current version of board units is " 0100 ", and version to be upgraded is comparatively new, can upgrade, therefore return the information of " 9000 ".If version to be downloaded is not up-to-date, represent that board units is upgraded, need not upgrade, return information is " 6985 " again.
Or upgrading terminals according to information such as the board units product type, software version and the hardware versions that receive, can judge that current version is the need of upgrading, if need upgrading, then entering step 304 verifies; Otherwise enter step 310, release communication link, board units enters resting state;
Step 304, upgrading terminals equipment and board units carry out two-way legitimate verification.
Checking instruction adopts getSecure.rq and TransferChannel.rq instruction.Upgrading terminals equipment issues checking random number (RandRSUForAuthen) to board units in getSecure.rq instruction, return result of calculation (i.e. authentication code Authenticator) to upgrading terminals by getSecure.rs instruction after board units carries out safety compute, board units returns the random number of 8 bytes to upgrading terminals simultaneously.After upgrading terminals carries out verification computation to the authentication code returned, if correctly, then complete the unidirectional legitimate verification of upgrading terminals to board units; Subsequently, upgrading terminals is handed down to board units by TransferChannel.rq instruction after being encrypted the 8 byte random numbers that board units returns, after board units is verified, complete the legitimate verification of board units to upgrading terminals, return TransferChannel.rs response.The data verification of board units is calculated by ESAM module, and the data verification of upgrading terminals equipment is calculated by PSAM module.
After two-way legitimate verification passes through, upgrading terminals equipment enters step 305, carries out upgrading subsequent operation; Otherwise enter step 310, release communication link, board units enters resting state;
Step 305, upgrade data transmits.Upgrading data packet is by one or more of TransferChannel.rq command to board units, and existing DSRC data frame transfer all adopts CRC check, and check code is 2 bytes.After every frame DSRC transfer of data, reception and verification situation are all returned to upgrading terminals by TransferChannel.rs Frame by board units.If middle a certain frame data fail to receive correctly, then board units returns reception error message, and upgrading terminals retransmits downlink data frame again, until all data are all transmitted.
In the present embodiment, the data acquisition plaintext transmission mode of upgrading data packet.Whether the upgrading data packet that board units business is supplied to ETC system operator carries out superencipher, does not affect the validity of upgrading flow process.Be necessary to protect its upgrade data if board units equipment vendor is thought, then the built-in superencipher key when board units dispatches from the factory, for being decrypted upgrading data packet.
The TransferChannel.rq frame format of upgrade data transmission and implication example thereof are as following table:
In upper table, " 00D6810120 " is upgrading transfer instruction, and " 20 " represent the upgrade data length that this DSRC Frame is follow-up, and unit is byte.
After board units finishes receiving, return corresponding data frame, the TransferChannel.rs data frame format returned and implication example thereof are as following table:
In upper table, board units returns " 9000 " after completing reception, if taken defeat, returns " 6985 ", if other mistakes then return other numerical value.
Step 306, upgrading data packet integrity verification.After upgrade data is transmitted, upgrading terminals sends the TransferChannel.rq instruction that terminates of packet, and this data frame packet is containing the CRC check code of upgrade data END instruction, upgrading data packet length information and upgrading data packet.After board units receives, its upgrading controls TSR and carries out integrity verification to the upgrade data packet length in buffer area and CRC check code, and return the information that checking is correct after being verified, authentication failed then returns authentication failed information.If board units authentication failed, then enter step 305 and again transmit upgrade data, if accumulative 3 bust thiss, then stop upgrading, enter step 310, upgrading terminals man-machine interface display corresponding information.
The TransferChannel.rq frame format of upgrading data packet integrity verification and implication example thereof are as following table:
In upper table, " 00B08101 " is the instruction of upgrading data packet integrity verification, and the packet data length of this upgrading of 6, the end byte representation of this instruction, unit is byte.
After board units finishes receiving, calculate and compare the data packet length of upgrading, the TransferChannel.rs data frame format returned and implication example thereof are as following table:
In upper table, it is identical that the data packet length and instruction that board units receives issues, and returns " 9000 ", otherwise return other numerical value.
Step 307, upgrade applications.The upgrading of board units controls TSR and is upgraded by the ROMPaq bag of data buffer area.
In the present embodiment, board units adopts program substitute mode to upgrade, and original application program is deleted, and enables new ROMPaq.
Step 308, updating result responds.Board units returns updating result response to upgrading terminals, if upgraded successfully, then enters step 310 after upgrading terminals record upgrade information, release communication link, and board units enters resting state; Upgrade else if failure, then board units returns the failed type information of upgrading, makes mistakes, enter step 309 as data packet length is not inconsistent, decipher unsuccessfully or upgrades, and is again upgraded or stop upgrading by the decision of upgrading terminals equipment.
Step 309, upgrading terminals subsequent treatment.The Fail Type information that upgrading terminals returns according to board units, determines again to upgrade or stop upgrading.If determine to stop upgrading, then enter step 310, release communication link, board units enters resting state; Otherwise if determine again to upgrade, then enter step 301, again upgrade, after adding up to upgrade unsuccessfully 3 times, stopping upgraded, upgrading terminals preserves upgrading record, and at its man-machine interface display corresponding information.
Step 310, upgrading terminals issues release link instructions (Event-Report), and this sign off, board units enters resting state.
embodiment 2:
Step 300, upgrade data loads.Upgrading data packet is pre-stored in ETC system background server, and this upgrading data packet is supplied to ETC system operator by the board units manufacturer of respective model.
Step 301, in the present embodiment, upgrading terminals is made up of smart mobile phone and DSRC module, and the application program on smart mobile phone is as the program controlling upgrading flow process, connect ETC system background server after starting, and send BST signal to board units to be upgraded by DSRC.The application program performing smart mobile phone needs the identity information of ETC background system verification operation personnel.
Step 302, board units returns vehicle service table signal (VST), the key message (as board units contract sequence number etc.) of board units should be comprised in VST instruction, smart mobile phone by DSRC interface VST information, and is transferred to ETC background system by wireless communication interface.
Step 303, the application program in smart mobile phone sends upgrading query statement to board units, and this instruction adopts Transferchannel.rq command format, after board units receives upgrade command, returns Transferchannel.rs response.
In the present embodiment, the product type of all board units, software version and hardware version, upgrading record etc. are by ETC background system record.The product software and hardware version information that board units returns is transmitted to ETC background system by smart mobile phone, ETC background system is according to the contract sequence number of board units, and distribution and upgrading record judge whether to need upgrading, if need upgrading, then enter step 305 and upgrade; Otherwise ETC background system sends release link instructions by smart mobile phone to board units, enters step 310, and stop upgrading, board units enters resting state.
Director data frame format in the present embodiment is identical with embodiment 1.
Step 304, two-way legitimate verification.
In the present embodiment, smart mobile phone is as transmission channel, and two-way legitimate verification carries out between ETC background system and board units.ETC background system produces certification random number (RandRSUForAuthen), in getSecure.rq instruction, board units is handed down to by DSRC module after smart mobile phone receives, result of calculation (i.e. authentication code Authenticator) is returned to smart mobile phone by getSecure.rs instruction after board units carries out safety compute, smart mobile phone is transmitted to ETC background system again, board units returns the random number of 8 bytes simultaneously, is transferred to ETC background system through smart mobile phone.After ETC background system carries out verification computation to the authentication code returned, if correctly, then complete the unidirectional legitimate verification of ETC background system to board units; Subsequently, ETC background system is handed down to board units through smart mobile phone by TransferChannel.rq instruction after being encrypted the 8 byte random numbers that board units returns, after board units is verified, complete the legitimate verification of board units to ETC background system, return TransferChannel.rs response.The data verification of board units is calculated by ESAM module, and the encryption and decryption of ETC background system is calculated by encryption equipment.
After two-way legitimate verification passes through, upgrading terminals equipment enters step 305, carries out upgrading subsequent operation; Otherwise authentication failed stops upgrading, enters step 310, smart mobile phone sends release link instructions to board units, and board units enters resting state;
Step 305, upgrade data transmits.Upgrading data packet passes through one or more of TransferChannel.rq command to board units by ETC background system through smart mobile phone, and existing DSRC transmission all adopts CRC check, and check code is 2 bytes.After every frame DSRC transfer of data, reception and verification situation are all returned to smart mobile phone by TransferChannel.rs Frame by board units.The DSRC Frame that smart mobile phone retains current transmission is used as error retransmission, and current DSRC Frame is correctly received, then smart mobile phone no longer preserves current DSRC Frame; Current data frame fails to receive correctly else if, then board units returns reception error message, and smart mobile phone retransmits descending DSRC Frame again.
In the present embodiment, the data acquisition of upgrading data packet expressly adds the transmission means of mac authentication code, upgrading data packet is divided into multiple DSRC Frame by ETC background system, is transferred to board units through smart mobile phone, and the key of checking adopts the ETC application encipher key of board units.Whether the upgrading data packet that board units equipment vendor is supplied to ETC system operator carries out superencipher, does not affect the validity of upgrading flow process.Be necessary to protect its upgrade data if board units equipment vendor is thought, then the built-in superencipher key when board units dispatches from the factory, for being decrypted upgrading data packet.
The TransferChannel.rq frame format of upgrade data transmission and implication example thereof are as following table:
In upper table, " 04D6810124 " is upgrading transfer instruction, and " 24 " represent that the follow-up upgrade data of this DSRC Frame adds the length (24 of 16 systems represent 36 bytes) of mac authentication code, and unit is byte.
After board units finishes receiving, verify, and returned by the result, the TransferChannel.rs data frame format returned and implication example thereof are as following table:
In upper table, board units returns " 9000 " after completing reception, if taken defeat, returns " 6985 ", if other mistakes then return other numerical value.
Step 306, upgrading data packet integrity verification.After upgrade data is transmitted, ETC background system sends the TransferChannel.rq instruction that terminates of packet, and this data frame packet is containing the CRC check code of upgrade data END instruction, upgrading data packet length information and upgrading data packet.After board units receives END instruction via smart mobile phone, its upgrading controls TSR and carries out integrity verification to the upgrade data packet length in buffer area and CRC check code, return the information that checking is correct after being verified, authentication failed then returns authentication failed information.If board units authentication failed, then enter step 305 and again transmit upgrade data, if accumulative 3 transmission are all failed, then stop upgrading, enter step 310 and discharge link, smart mobile phone Application Program Interface display corresponding information.
The upgrading data packet integrity verification instruction of the present embodiment is identical with embodiment 1 with return data frame format.
Step 307, upgrade applications.The upgrading of board units controls TSR and is upgraded by the ROMPaq bag of data buffer area.
In the present embodiment, board units adopts program change method to upgrade, retain original application program and newly downloaded ROMPaq simultaneously, new ROMPaq packet is stored in the memory block of board units after the ETC application encipher secret key decryption of board units, and is designated current application program.
Step 308, updating result responds.Board units returns updating result response to smart mobile phone, if upgraded successfully, then and smart mobile phone record upgrade information enter step 310 after being uploaded to ETC background system, release communication link, board units enters resting state; Upgrade else if failure, then board units returns the failed type information of upgrading, makes mistakes, enter step 309 as data packet length is not inconsistent, decipher unsuccessfully or upgrades, and is again upgraded or stop upgrading by the decision of ETC background system.
Step 309, upgrading terminals subsequent treatment.In the present embodiment, the Fail Type information that smart mobile phone returns according to board units, determines again to upgrade or stop upgrading.If determine to stop upgrading, then enter step 310, release communication link, record upgrade information, board units enters resting state; If determine again to upgrade, then enter step 301, smart mobile phone is upgraded again to the application of ETC background system, after adding up to upgrade unsuccessfully 3 times, smart mobile phone record upgrading failure information is also uploaded to ETC background system, stops this upgrading, the man-machine interface display corresponding information of smart mobile phone.
Step 310, upgrading terminals equipment issues release link instructions (Event-Report), and the communication connection of release and board units, board units enters resting state.
In the embodiment of the present invention, for the data encrypting and deciphering algorithm of legitimate verification except the DES/3DES algorithm of ETC system national Specification, the cryptographic algorithm that AES, MD5 and SHA1 etc. are conventional can also be adopted.
By the method and system of the embodiment of the present invention, adopt DSRC interface as the unified interface of board units software upgrading, reduce upgrade cost; Updating operation is carried out, compatible all board units models by special DSRC command format; The legitimate verification of upgrading advance driving carrier unit and upgrading terminals, ensures the safety of upgrade data and escalation process.
For the detailed explanation of the respective embodiments described above, its object is only to make an explanation to the present invention, so that the present invention can be understood better, but, it is limitation of the present invention that these descriptions can not become with any explanation, particularly, each feature described in various embodiments also can combination in any mutually, thus form other execution modes, except there being clearly contrary description, these features should be understood to can be applied in any one execution mode, and are also not only confined to described execution mode.
Claims (10)
1., by a system for DSRC Interface realization board units software upgrading, it is characterized in that comprising, board units, upgrading terminals;
Described upgrading terminals sends upgrading query statement by DSRC interface to described board units;
Described board units by this board units current version information feed back to upgrading terminals;
The version information of described upgrading terminals by feeding back described in DSRC interface, and judge that described board units is the need of upgrading;
Described upgrading terminals determines whether send upgrade command and upgrading data packet to described board units according to judged result;
Described board units, by upgrade command and upgrading data packet described in DSRC interface, carries out software upgrading.
2. a kind of system by the software upgrading of DSRC Interface realization board units according to claim 1, it is characterized in that, described board units comprises processor, memory block, DSRC module and secure access module, wherein,
Described processor, for carrying out Digital Signal Processing and control;
Described DSRC module, for carrying out DSRC signal transmitting and receiving;
Described secure access module, carries out encryption and decryption calculating for storage key data;
Described memory block, comprises upgrading and controls resident element, application program unit and buffer area, and wherein said upgrading controls resident element and controls upgrading flow process according to upgrade command; Described application program unit performs described board units and carries out ETC transaction; Described buffer area is for storing the upgrading data packet received.
3. a kind of system by the software upgrading of DSRC Interface realization board units according to claim 2, it is characterized in that, it is read-only storage chip that described upgrading controls resident element.
4. a kind of system by the software upgrading of DSRC Interface realization board units according to claim 1, it is characterized in that, described upgrading terminals comprises, processor, memory block, DSRC module and secure access module, wherein,
Described processor, for Digital Signal Processing and control;
Described DSRC module, for carrying out DSRC signal transmitting and receiving;
Described secure access module, carries out key data calculating for storage key data;
Described memory block comprises further, and upgrading control unit, for the control of updating operation; Data storage area, for storing upgrading data packet.
5. a kind of system by the software upgrading of DSRC Interface realization board units according to claim 1, it is characterized in that, described upgrading terminals comprises, processor, memory block, DSRC module and wireless communication module, wherein,
Described processor, for Digital Signal Processing and control;
Described DSRC module, for carrying out DSRC signal transmitting and receiving;
Described wireless communication module, for communicating with background server, obtains upgrading data packet and encryption and decryption result of calculation;
Described memory block comprises further, and upgrading control unit, for the control of updating operation; Data storage area, for storing upgrading data packet.
6., by a method for DSRC Interface realization board units software upgrading, it is characterized in that,
Upgrading terminals sends upgrading query statement by DSRC interface to board units;
Described board units by this board units current version information feed back to upgrading terminals;
The version information of described upgrading terminals by feeding back described in DSRC interface, and judge that described board units is the need of upgrading;
Described upgrading terminals determines whether send upgrade command and upgrading data packet to described board units according to judged result;
Described board units, by upgrade command and upgrading data packet described in DSRC interface, carries out software upgrading.
7. a kind of method by the software upgrading of DSRC Interface realization board units according to claim 6, it is characterized in that, described board units carries out encryption and decryption by upgrade described in the key be preset in secure access module or the double secret key received when described board units and upgrading terminals connect query statement, upgrade command and upgrading data packet and calculates Information Security to verify described upgrading query statement, upgrade command and upgrading data packet.
8. a kind of method by the software upgrading of DSRC Interface realization board units according to claim 7, is characterized in that, the upgrading controlling upgrading flow process is controlled resident element be positioned in read-only storage chip in board units.
9. a kind of method by the software upgrading of DSRC Interface realization board units according to claim 6, it is characterized in that, the comparative result of described upgrading terminals to upgrading data packet and described board units feedback carries out encryption and decryption calculating with the Information Security verifying described upgrading data packet and described comparative result.
10. a kind of method by the software upgrading of DSRC Interface realization board units according to claim 6, it is characterized in that, described upgrading terminals and background server obtain upgrading data packet and encryption and decryption result of calculation.
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