CN115460037A - CAN network management method, device, management equipment, vehicle and storage medium - Google Patents
CAN network management method, device, management equipment, vehicle and storage medium Download PDFInfo
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
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Abstract
A CAN network management method, a device, a management device, a vehicle and a storage medium relate to the technical field of routing header address processing. In the management equipment, the management equipment comprises a central gateway, a primary link, an electric control unit and a secondary link, wherein the central gateway is connected with a plurality of electric control units based on a plurality of primary links, and the electric control units are respectively connected with the matched secondary links. The central gateway is matched with the electric control unit to realize dormancy of the electric control unit, the connecting network and the like which are not in function operation until the corresponding awakening source awakens the electric control unit and guides the electric control unit to enter the function operation, so that the function idleness caused by the fact that the central gateway node, the primary communication network, the gateway node and the private network are always kept in an operation state is reduced, and the operation efficiency of the electric control unit and the central gateway is improved. Furthermore, the invention can realize the functions of initializing ECU resources and coordinating each network node to respectively enter awakening or sleeping and the like, thereby reducing the cost on the wiring harness and reducing the energy consumption of the storage battery.
Description
Technical Field
The invention belongs to the technical field of header address processing for routing, and particularly relates to a CAN network management method, a device, a management equipment vehicle and a storage medium.
Background
With the rapid development of the automobile industry, the application of new energy technology to automobiles is increasing, and new requirements and new functions of automobiles are increasing, the number of ECU control units in automobiles is also increasing synchronously, but with the increase of ECUs, new challenges are brought inevitably: data forwarding, wiring harness increasing, storage battery energy consumption control and function realization reliability, and a network architecture of the central gateway gradually replaces a distributed network architecture.
CN210081576U discloses a central gateway controller for optimizing a vehicle network CAN bus, comprising: the first CAN communication module is used for connecting a CAN bus to carry out CAN communication; the second CAN communication module is used for connecting the CAN bus so as to awaken the central gateway controller through the CAN bus; the LIN communication module is used for connecting the LIN bus to perform LIN communication; and the control module is respectively and electrically connected with the first CAN communication module, the second CAN communication module and the LIN communication module and is used for controlling the first CAN communication module, the second CAN communication module and the LIN communication module to work. Although the central gateway is used for network management, the invention does not relate to how to optimize the management of respectively waking up or sleeping each network node, which undoubtedly causes the energy consumption of the storage battery to be always in a high level and increases the aging rate of the battery.
Disclosure of Invention
The purpose of the invention is: aims to provide a CAN network management method, a device, a management device and a storage medium for solving the problem
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
a CAN network management method is applied to management equipment, the management equipment comprises a central gateway, a primary link, electric control units and secondary links, the central gateway is connected with a plurality of the electric control units based on the primary links, the electric control units are respectively connected with the matched secondary links, the method comprises the following steps,
s1: when a wake-up event occurs, waking up the electronic control unit based on the central gateway and/or the secondary link;
s2: when the electronic control unit self-checks to obtain a communication demand result, managing the central gateway, the primary link and the secondary link to complete functions or keep silent;
s3: and after the electric control unit judges that the network segment has no network request, managing the central gateway, the primary link and the secondary link to enter dormancy.
With reference to the first aspect, in some optional embodiments, the wake-up event includes a remote wake-up and a local wake-up, the remote wake-up is to send a message to the electronic control unit based on the primary link by the central gateway, and the local wake-up is to send a message to the electronic control unit based on the secondary link.
With reference to the first aspect, in some optional embodiments, after the electronic control unit that wakes up first determines that the wake-up event has a communication requirement, the electronic control unit sends a network management packet to the central gateway based on the primary link, and the central gateway makes a target wake-up decision of the primary link based on an analysis structure of the network management packet.
With reference to the first aspect, in some optional embodiments, when the electronic control unit that wakes up first determines that there is no communication demand for the wake-up event, the electronic control unit keeps silent.
With reference to the first aspect, in some optional embodiments, the dormancy is that the electronic control unit stops sending the network management packet to the central gateway after determining that the network of the network segment is requested, the central gateway stops sending a packet to the target network segment from the corresponding primary link when not receiving the network management packet, stops transmitting a packet to the secondary link when not receiving the packet, and enters the dormancy when all the primary links have no packet transmission.
In a second aspect, an embodiment of the present application provides a CAN network management apparatus, which is applied to a management device, where the management device includes a central gateway, a primary link, an electronic control unit, and a secondary link, where the central gateway is connected to a plurality of electronic control units based on the primary link, and the electronic control units are respectively connected to the matched secondary links, and the apparatus includes:
the wake-up unit is used for waking up the electronic control unit based on the central gateway and/or the secondary link when a wake-up event occurs;
an action unit: when the electronic control unit self-checks to obtain a communication demand result, managing the central gateway, the primary link and the secondary link to complete functions or keep silent;
a sleep unit: and after the electric control unit judges that the network segment of the electric control unit has no network request, managing the central gateway, the primary link and the secondary link to enter dormancy.
With reference to the second aspect, in some optional embodiments, the wake-up unit, the active unit and the sleep unit are respectively coupled to the electronic control unit.
In a third aspect, an embodiment of the present application provides a management device, where the management device includes a central gateway, a primary link, an electronic control unit, a secondary link, and a storage module, where the central gateway is connected to a plurality of the electronic control units based on the primary link, the electronic control units are respectively connected to matching secondary links, and the storage module stores a computer program, and when the computer program is executed by the electronic control units, the control device is caused to perform the method according to any one of claims.
In a fourth aspect, embodiments of the present application provide a vehicle, where the vehicle includes a vehicle body and the management apparatus according to the claims, where the management apparatus is disposed on the vehicle.
In a fifth aspect, the present application provides a computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, and when the computer program runs on a computer, the computer is caused to execute the method according to any one of the claims.
The invention adopting the technical scheme has the advantages that:
in the scheme, the central gateway is matched with the electric control unit to realize the dormancy of the electric control unit, the connecting network and the like which are not in the function operation until the corresponding awakening source awakens the electric control unit and the connecting network and guides the electric control unit to enter the function operation, so that the function idle caused by the fact that the central gateway node, the primary communication network, the gateway node and the private network are always kept in the operation state is reduced, and the operation efficiency of the electric control unit and the central gateway is improved. Furthermore, the invention improves the security of network communication, can realize the functions of initializing ECU resources, starting the network, detecting, processing and informing the states of the network and the nodes, coordinating each network node to respectively enter the functions of awakening or sleeping and the like, reduces the cost on the wiring harness, and reduces the energy consumption of the storage battery by the design mode of partial dormancy awakening.
Drawings
The invention is further illustrated by the non-limiting examples given in the accompanying drawings;
fig. 1 is a diagram of a network management architecture of an embodiment of a management device of the present invention;
fig. 2 is a schematic diagram of node and network hierarchy division according to an embodiment of the management apparatus of the present invention.
The main component symbols are as follows:
100: a central gateway; 200: a first link; 300: an electronic control unit; 400: a secondary link; 500: a wake-up unit; 600: an action unit; 700: and a sleep unit.
Detailed Description
The present invention will be described in detail with reference to the drawings and specific embodiments, wherein like reference numerals are used for similar or identical parts in the drawings or the description, and implementations not shown or described in the drawings are known to those of ordinary skill in the art. In addition, directional terms, such as "upper", "lower", "top", "bottom", "left", "right", "front", "rear", and the like, used in the embodiments are only directions referring to the drawings, and are not intended to limit the scope of the present invention.
As shown in fig. 1, an embodiment of the present application provides a management device. The management device includes a central gateway 100, a primary link 200, an electronic control unit 300, a secondary link 400, and a storage module. The central gateway 200 is connected to a plurality of electronic control units 300 based on a plurality of primary links 200. The electronic control units 300 are respectively connected with the corresponding matched secondary links 400.
The primary link 200 of this embodiment is preferably a CANFD line. The central gateway 100 communicates with a plurality of electronic control units 300 through a plurality of CANFD lines. The electronic control unit 300 is preferably an ECU (on-board computer). The different electronic control units 300 are respectively connected to the control devices (such as bluetooth, remote control, switch, etc.) needing communication control through the corresponding matched secondary links 400. The secondary link 400 may be distinguished as a LIN line, a CAN line, a hard line, an ethernet, etc. depending on the kind of a connected control device.
In the embodiment, the management device is mainly deployed on the vehicle for identifying and positioning the wake-up reason of the vehicle, but the invention can also be arranged on devices needing network communication, such as a computer, a switching device and a processor. The main purpose is to ensure the safety and reliability of network communication, realize the functions of initializing single control unit resources, starting the network, detecting, processing and informing the states of the network and the nodes, coordinating each network node to respectively enter the functions of awakening or sleeping and the like, reduce the cost on the wire harness, and reduce the energy consumption of the storage battery by partial dormancy awakening.
The management device only supports data transmission of a CAN (CAN FD) network segment, wherein LIN and hard-line communication requirements serve as local wake-up and sleep conditions of the ECU (details are shown below), and the management device CAN be divided according to the following contents based on node hierarchy division: the central gateway 100 is divided into central gateway nodes with network request cause analysis and target wake-up segment decision functions; the electronic control unit 300 directly connected to the central gateway 100 based on the primary link 200 is divided into primary nodes or gateway nodes. And (3) grading the whole vehicle network: dividing the set of primary links 200 for the connection of the central gateway 100 and the electronic control unit 300 into a primary communication network; the set of parts of the gateway node responsible for dormancy wakeup is divided into private networks.
The memory module stores therein a computer program which, when executed by the electronic control unit 300 or the central gateway, enables the management device to perform the corresponding steps of the CAN network management method described below.
Referring to fig. 2, an embodiment of the present application provides a method for managing a CAN network. The CAN network management method comprises the following steps:
s1: upon the occurrence of a wake-up event, waking up the electronic control unit 300 based on the central gateway 100 and/or the secondary link 400;
s2: when the electronic control unit 300 self-checks the communication demand result, managing the central gateway 100, the primary link 200 and the secondary link 400 to complete the function or keep silent;
s3: after the electronic control unit 300 determines that there is no network request in its own network segment, it manages the central gateway 100, the primary link 200, and the secondary link 400 to enter into sleep.
In step S1, when a wake-up event occurs, the electronic control unit 300 is woken up based on the central gateway 100 and/or the secondary link 400. The wake-up event may also be referred to as a wake-up source, and the electronic control unit 300 is woken up by the wake-up source and then participates in network management of the corresponding network segment, thereby recovering the message transceiving capability. The wake-up source of the electronic control unit 400 may be divided into local wake-up and remote wake-up according to the type of the wake-up source. The local wake-up comprises:
1. the electronic control unit 300 which takes the KL15 electricity as a wake-up source receives the KL15 electricity and then is awakened completely, and enters a working state;
2. the electronic control unit 300 is awakened by a local hard-wired wake-up source, such as switches and sensors;
3. the electronic control unit 300 is awakened in a wireless network scene, such as remote control, bluetooth, NFC, and the like;
4. the electronic control unit 300 itself has a self-wake-up function (timing or reaching a specific condition), such as T-BOX scheduled charging, etc.;
in the lin network, the electronic control unit 300 (gateway node) is awakened from the node; in ethernet, the controller is woken up by the ethernet.
Remote wakeup: the ecu 300 is awakened by network management messages on the primary link 200.
In step S2, when the electronic control unit 300 self-checks the communication requirement result, the central gateway 100, the primary link 200, and the secondary link 400 are managed to complete the function or keep silent. After the single or a plurality of electric control units 300 are awakened, whether the communication requirement exists is self-checked, if the communication requirement exists, a network management message is sent to the primary link 200, and the electric control units 300 with the network management function are awakened to complete the function realization; when there is no communication demand, it is prohibited to send any message to the primary link 200. The minimum granularity of network management in this application is a network segment, and the central gateway 100 serving as a central gateway node is required to support respective awakening of the electronic control unit 300 on the node of the drop-off gateway node. Specifically, as follows, the following description will be given,
s210: the electronic control unit 300 on the gateway node which is awakened (locally awakened) first identifies the awakening source, and after judging the communication requirement, sends an NM message on the primary communication network, and awakens the primary communication network at a position 1 corresponding to the network request reason of the message content;
s220: the central gateway node receives the network management message of the electronic control unit 300 on the gateway node which is awakened first, and after being awakened, the central gateway node performs network request reason analysis and target awakening network segment decision function;
s230: the central gateway node selects a corresponding first-level link 200 to send a network management message to wake up the target electronic control unit 300;
s240: the electric control unit 300 on the gateway node is awakened after receiving the network management message sent by the central gateway node, and then decides private network awakening according to the application message signal.
During network management design, the electric control units 300 participating in network management are combed, a source address ID is distributed to each electric control unit 300, and a network management message format Byte0 is referred to; secondly, analyzing all scenes which are possibly awakened after the vehicle is dormant, and combing out the network request reason of each controller, wherein each bit of the Byte 1-Byte 3 in the network management message format represents a network request reason, when the controller requests the network to work, the controller is set to be 0 at the position 1 corresponding to the corresponding reason, otherwise, the controller is set to be 0.
The format of the network management message is as follows in table 1:
table 1 network management message format
And S3, after the electric control unit (300) judges that the network segment has no network request, managing the central gateway (100), the primary link (200) and the secondary link (400) to enter dormancy. Specifically, the whole vehicle network dormancy step is as follows:
s310: after the electronic control unit 300 on the primary node judges that the network segment has no network request, the NM message is stopped sending, and the reason of the network request is set to be 0;
s320: after receiving the changed network management message, the central gateway 100 on the central gateway node judges that the target network segment has no network reason request, stops sending the network management message in the target network segment, and enters the dormancy of the corresponding primary link 200;
s330: when the corresponding electronic control unit 300 judges that the corresponding primary link 200 of the primary communication network has no network management message, the private network is dormant;
s340: when all the primary communication networks are dormant, the central gateway node enters dormancy;
s350: and the whole vehicle network enters the dormancy.
The embodiment provides a CAN network management device, which includes at least one software functional module stored in a storage module in the form of software or Firmware (Firmware) or solidified in an Operating System (OS) in a management device. The central gateway 100 and the electronic control unit 300 are used to execute executable modules stored in the storage module, such as software function modules and computer program modules included in the CAN network management device.
The CAN network management apparatus includes a wakeup unit 500, an active unit 600, and a sleep unit 700. The wake-up unit 500, the active unit 600, and the sleep unit 700 may be respectively coupled to the electronic control unit 300. The functions that each unit has may be as follows:
a wake-up unit 500 for waking up the electronic control unit 300 based on the central gateway 100 and/or the secondary link 400 when a wake-up event occurs;
the action unit 600: when the electronic control unit 300 self-checks the communication demand result, managing the central gateway 100, the primary link 200 and the secondary link 400 to complete the function or keep silent;
the sleep unit 700: after the electronic control unit 300 determines that there is no network request in its own network segment, it manages the central gateway 100, the primary link 200, and the secondary link 400 to enter into sleep.
In this embodiment, the storage module may be, but is not limited to, a random access memory, a read only memory, a programmable read only memory, an erasable programmable read only memory, an electrically erasable programmable read only memory, and the like. In this embodiment, the storage module can be used to store messages, algorithms, data, etc. on the electronic control unit 300 and the central gateway 100. Of course, the storage module may also be used to store a program, and the processing module executes the program after receiving the execution instruction.
It is understood that the structure of the management device shown in fig. 1 is only a schematic structure, and the management device may further include more components than those shown in fig. 1. The components shown in fig. 1 may be implemented in hardware, software, or a combination thereof.
It should be noted that, as will be clear to those skilled in the art, for convenience and brevity of description, the above-described wake-up process, action process and sleep process of the electronic control unit 300 may refer to the corresponding processes of the foregoing steps of the method, and will not be described in detail herein.
Embodiments of the present application also provide a vehicle including a vehicle body and the above-mentioned management apparatus disposed on the vehicle. The management equipment can be used for ensuring the safety and reliability of network communication, can realize the functions of initializing single control unit resources, starting the network, detecting, processing and informing the states of the network and the nodes, coordinating each network node to respectively enter the functions of awakening or sleeping and the like, reduces the cost on a wire harness, and reduces the energy consumption of a storage battery by partial dormancy awakening.
The embodiment of the application also provides a computer readable storage medium. The computer-readable storage medium has stored therein a computer program that, when run on a computer, causes the computer to execute the CAN network management method as described in the above embodiments.
From the above description of the embodiments, it is clear to those skilled in the art that the present application can be implemented by hardware, or by software plus a necessary general hardware platform, and based on such understanding, the technical solution of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a usb disk, a removable hard disk, etc.), and includes several instructions to enable a computer device (which can be a personal computer, a management device, or a network device, etc.) to execute the method described in the embodiments of the present application.
The invention aims to: a new network management architecture is defined, the identification of the awakening reason of the vehicle is realized, and the awakening network segment can be accurately positioned; defining a network management architecture of a central gateway, wherein the network management architecture is used for identifying a network communication path, a network communication mode and a network node; defining a node hierarchy partition, the node hierarchy partition being used for explaining the hierarchy relationship of each node; defining a whole vehicle network hierarchical division, wherein the whole vehicle network hierarchical division aims to explain the hierarchical relation of each communication network segment; in the network awakening process, a network management message is included and used for awakening a target network segment and describing the reason of network awakening, so that a central gateway node can conveniently judge the reason of awakening and decide the awakening of the target network segment; a network dormancy method is provided for realizing the dormancy of network segments.
In summary, the embodiments of the present application provide a cooling control method, a cooling control device, a cooling apparatus, a vehicle, and a storage medium. In the scheme, the central gateway 100 is matched with the electronic control unit 300 to realize the dormancy of the electronic control unit 300 which is not in the function operation until the corresponding awakening source awakens the electronic control unit 300 and guides the electronic control unit to enter the function operation, so that the energy loss and function idling caused by the fact that the central gateway node, the primary communication network, the gateway node and the private network are always kept in the operation state are reduced, and the operation efficiency of the electronic control unit 300 and the central gateway 100 is improved.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus, system, and method may be implemented in other ways. The apparatus, system, and method embodiments described above are illustrative only, as the flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions. In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A CAN network management method applied to a management device, wherein the management device comprises a central gateway (100), a primary link (200), electric control units (300) and a secondary link (400), the central gateway (100) is connected with a plurality of electric control units (300) based on the primary link (200), the electric control units (300) are respectively connected with matched secondary links (400), the method comprises the following steps,
s1: upon the occurrence of a wake-up event, waking up the electronic control unit (300) based on the central gateway (100) and/or the secondary link (400);
s2: when the electronic control unit (300) self-checks a communication demand result, managing the central gateway (100), the primary link (200) and the secondary link (400) to complete functions or keep silent;
s3: and after the electric control unit (300) judges that no network request exists in the network segment, managing the central gateway (100), the primary link (200) and the secondary link (400) to enter the dormancy state.
2. The network management method according to claim 1, wherein the wake-up event comprises a remote wake-up consisting in the central gateway (100) sending a message to the electronic control unit (300) based on the primary link (200) and a local wake-up consisting in the sending of a message to the electronic control unit (300) based on the secondary link (400).
3. The method according to claim 1, wherein the ecu (300) that wakes up first sends a network management packet to the central gateway (100) based on the primary link (200) after determining that the wake-up event has a communication requirement, and the central gateway (100) makes a target primary link (200) wake-up decision based on an analysis structure of the network management packet.
4. The network management method according to claim 3, characterized in that the electronic control unit (300) waking up at the first time keeps silent when it determines that there is no communication demand for the wake-up event.
5. The network management method according to claim 3, wherein the dormancy step comprises stopping sending the network management message to the central gateway (100) after the electronic control unit (300) determines that it has a network segment physical network request, stopping sending a message to the corresponding primary link (200) to a target network segment by the central gateway (100) when the network management message is not received, stopping sending a message to the secondary link (400) when the electronic control unit (300) does not receive the message, and entering dormancy when there is no message transmission on all primary links (200).
6. A CAN network management apparatus applied to a management device including a central gateway (100), a primary link (200), an electronic control unit (300), and a secondary link (400), wherein the central gateway (100) is connected to a plurality of the electronic control units (300) based on the primary link (200), and the electronic control units (300) are respectively connected to the matched secondary links (400), the apparatus comprising:
a wake-up unit (500) for waking up the electronic control unit (300) based on the central gateway (100) and/or the secondary link (400) upon a wake-up event;
action unit (600): when the electronic control unit (300) self-checks a communication demand result, managing the central gateway (100), the primary link (200) and the secondary link (400) to complete functions or keep silent;
sleep unit (700): and after the electric control unit (300) judges that no network request exists in the network segment, managing the central gateway (100), the primary link (200) and the secondary link (400) to enter the dormancy state.
7. The CAN network management device of claim 6, wherein the wake-up unit (500), the active unit (600) and the sleep unit (700) are each coupled to the electronic control unit (300).
8. A management device, characterized in that it comprises a central gateway (100), a primary link (200), an electronic control unit (300), a secondary link (400) and a storage module, said central gateway (100) being connected to a plurality of said electronic control units (300) on the basis of said primary link (200), said electronic control units (300) being respectively connected to matching secondary links (400), said storage module having stored therein a computer program which, when executed by said electronic control unit (300), causes said control device to carry out the method according to any one of claims 1 to 5.
9. A vehicle characterized by comprising a vehicle body and the management apparatus according to claim 8, the management apparatus being provided on the vehicle.
10. A computer-readable storage medium, in which a computer program is stored which, when run on a computer, causes the computer to perform the method of any one of claims 1-5.
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Application publication date: 20221209 |