CN110311992B - Function addressing method for unified diagnosis service of automobile Ethernet - Google Patents
Function addressing method for unified diagnosis service of automobile Ethernet Download PDFInfo
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- 238000003745 diagnosis Methods 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004891 communication Methods 0.000 claims abstract description 72
- 238000012360 testing method Methods 0.000 claims abstract description 62
- 238000012545 processing Methods 0.000 claims abstract description 28
- 238000013507 mapping Methods 0.000 claims abstract description 26
- 230000004913 activation Effects 0.000 claims description 15
- 125000000524 functional group Chemical group 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 18
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5069—Address allocation for group communication, multicast communication or broadcast communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5084—Providing for device mobility
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Abstract
The invention discloses a UDS function addressing method based on an automobile Ethernet, which is characterized by comprising the following steps: mapping the function addressing address and the IP multicast address, establishing a mapping table and arranging the mapping table in a node for the Ethernet diagnosis function; according to the mapping table, the control of the server on the access authority of the external test equipment is completed; sending a diagnostic communication of the functional addressing communication mode to a server; and after receiving the function addressing diagnosis message, the server carries out diagnosis processing. By adopting the technical scheme of the invention, when the client processes the function addressing transmission, only one time of processing is needed to transmit one data packet, and the processing time of the external test equipment, the time of the whole communication and the occupation of the system bandwidth are improved well.
Description
Technical Field
The invention belongs to the field of diagnosis and communication of automobile Ethernet, and particularly relates to a UDS (unified Diagnostic service) function addressing method based on the automobile Ethernet.
Background
In automotive ethernet technology, the diagnostic high-level data (UDS) is carried over the doip (diagnostic communication over Internet protocol). In particular, the diagnostic data message carried in the DoIP protocol is carried on the diagnostic data message of the load type 0x 8001. In the current version of the DoIP protocol, a diagnostic packet explicitly indicating 0x8001 is carried over tcp (transmission Control protocol). That is, the DoIP-based diagnostic communication only has the capability of point-to-point communication.
While diagnostic communication actually supports two modes of communication, physical addressing and functional addressing. Physical addressing is point-to-point communication and functional addressing is one-to-many communication. On the basis of the current implementation scheme of the automobile Ethernet diagnosis, if a communication mode of functional addressing is needed, a data packet needs to be sent to each node needing to be communicated independently on a DoIP layer, namely one-to-many communication is completed in a mode of multiple single-point communication.
When the diagnosis communication is implemented on the CAN bus, and when the function addressing is needed, the external test equipment only needs to send a message once, and all corresponding servers CAN receive the message of the corresponding function addressing.
In conventional ethernet, there are also mature solutions for one-to-many communication, i.e. IP-based broadcast and multicast. However, at present, in the initial development stage of the automobile ethernet technology, the process of combining the ethernet technology with the original diagnostic communication requirement is clumsy in the implementation of functional addressing. The method replaces one-to-many communication with a multi-time single-point communication mode, increases the software processing complexity of a diagnosis communication initiator, increases the data packets required to be sent by single-time function addressing communication along with the increase of function addressing objects, and wastes the processing time and the bus bandwidth of response wastefully. The simple and direct use of ethernet multicast/broadcast to transmit function addressing messages is not safe enough for automobile diagnosis services.
Disclosure of Invention
The invention provides a UDS function addressing method based on an automobile Ethernet, thereby effectively reducing the software processing complexity of a communication initiator, and improving the processing time of response and the utilization rate of bus bandwidth.
In accordance with the above object, a functional addressing method for unified diagnostic service based on automotive ethernet according to the present invention is implemented, comprising the steps of:
step S1, establishing a mapping table between the function group address and the IP multicast address;
step S2, completing the control of the server to the access authority of the external test equipment, and adding the server into the IP multicast group according to the mapping table;
step S3, sending a diagnosis message of the function addressing communication mode to a server in the IP multicast group, wherein the diagnosis message comprises an IP multicast address;
step S4, according to the diagnosis message of the function addressing mode, the diagnosis process is carried out;
wherein, the server has a function group address and an IP address, and the IP multicast address is composed of the IP address.
Optionally, the step S2 includes:
step S21, searching the IP address of the server;
step S22, establishing a TCP connection with the server apparatus;
step S23, sending a request message for route activation, wherein the request message contains a logic address of an external test device;
step S24, judging whether the diagnosis communication can be carried out according to the logic address, if the diagnosis communication can be carried out, marking the current TCP connection as activated, and executing step S25; otherwise, go to step S26;
step S25, according to the mapping table, finding out the IP multicast address corresponding to the function group address of the server, adding the server into the IP multicast group, and marking the logic address as activated;
and step S26, disconnecting the current TCP connection, and if the external test equipment and the server have no other connection at the moment, the server quits the IP multicast group.
Optionally, in step S3, according to the IP multicast address in the diagnostic message, the external test device sends the diagnostic message of the function addressing communication mode to a server in the IP multicast group, where a data packet of the IP multicast address is encapsulated according to a user data packet protocol.
Optionally, the step S4 includes:
step S41, detecting whether the logic address of the external test equipment is activated, if yes, executing the next step; otherwise, sending a failure response code to the external test equipment, and closing the current TCP connection;
step S42, judging whether the server supports the function group address corresponding to the IP multicast address in the diagnosis message, if yes, executing the next step; otherwise, sending a failure response code to the external test equipment and discarding the diagnosis message;
and step S43, sending a success response code to the external test equipment, reporting the diagnosis message to a diagnosis processing module in the server, and starting diagnosis processing.
In accordance with the above purposes, an external test device embodying the present invention, for functional addressing of unified diagnostic services over automotive ethernet, is characterized in that,
the external test equipment sends a request message of route activation to the server, the server is added into the IP multicast group according to a mapping table between the functional group address and the IP multicast address after the route activation, and a diagnosis message of a functional addressing communication mode is sent to the server in the IP multicast group for diagnosis processing during diagnosis communication;
the server has a function group address and an IP address, and the diagnosis message contains an IP multicast address.
Optionally, the request message includes logical address information of the external test device, and is used for the server to determine whether the external test device has the right to perform diagnostic communication.
In accordance with the above purposes, a vehicle network system implementing the present invention, for the functional addressing of a unified diagnostic service on a car ethernet, comprising a gateway for diagnostic communication based on an IP network and a server, is characterized in that,
the gateway is used for establishing TCP connection between external test equipment and a server, and a mapping table between a function group address and an IP multicast address is arranged in a node which is related to a diagnosis function in the gateway;
the server receives a request message of route activation sent by external test equipment and judges whether the external test equipment has the authority to carry out diagnosis communication; and receiving the diagnosis message of the function addressing communication mode during diagnosis communication and performing diagnosis processing.
Optionally, the request message includes logical address information of the external test device, and the server determines whether the external test device has permission to perform diagnostic communication according to the logical address information.
Optionally, the server includes a diagnosis processing module inside, and can perform diagnosis processing according to the diagnosis message.
Optionally, the communication connection mode between the external test device and the server includes wireless communication and wired communication;
the wireless communication includes but is not limited to Wifi, 4G, 5G, bluetooth.
By adopting the technical scheme of the invention, aiming at the defects of the prior art, the improved multicast mode is adopted by adopting the functional address and IP address mapping table, utilizing the limited authority access mechanism of TCP and route activation and the improved Ethernet multicast mechanism, and when the client processes the functional addressing transmission, only one time is needed to be processed, and only one data packet is transmitted, so that the processing time of the external test equipment, the time of the whole communication and the occupation of the system bandwidth are improved.
Drawings
FIG. 1 is a schematic diagram of: a flow chart of functional addressing mode access control;
FIG. 2 is a diagram of: a structure diagram of the unicast mode diagnosis message in a functional addressing mode;
FIG. 3 is a diagram of: the structure diagram of the multicast mode diagnosis message under the functional addressing mode;
FIG. 4 is a diagram of: a schematic structure diagram of an IP data load;
FIG. 5 is a diagram of: a schematic diagram of a TCP data payload;
FIG. 6 is a diagram of: a schematic structure diagram of a UDP header;
FIG. 7 is a diagram of: a schematic diagram of a unicast mode;
FIG. 8 is a diagram of: a schematic diagram of a multicast mode;
FIG. 9 is a schematic diagram of: a flow chart of diagnostic message reception processing in functional addressing mode.
Detailed Description
The technical scheme of the invention is further explained by combining the drawings and the embodiment. The invention relates to a UDS function addressing method based on an automobile Ethernet, which comprises the following specific implementation steps:
firstly, a mapping table is established between the functional addressing address and the IP multicast address.
According to the DoIP protocol standard, the functional addressing addresses are specified as follows:
TABLE 1 functional addressing group Address definition
And the IP protocol uses IP addresses between 224.0.0.0 and 239.255.255.255 as IP multicast addresses, wherein 224.0.2.0 to 238.255.255.255 are multicast addresses available for users.
When the automobile Ethernet diagnosis system is actually used, firstly, the function group address (function addressing address) and the IP multicast address are mapped one by one, and the mapping table is arranged in the relevant nodes of the automobile Ethernet diagnosis function.
In one embodiment, the mapping table of the function group address and the IP multicast address may be as follows:
| function group address | IP multicast address |
| 0xE000 | 225.1.224.0 |
| 0xE000…0xE3FF | 225.1.224.0…225.1.227.255 |
| 0xE400…0xEFFF | 225.1.228.0…225.1.239.255 |
Table 2 function group address and IP multicast mapping table
It should be noted that the mapping table is necessary for the car ethernet diagnostic service function addressing scheme to be carried on the IP multicast scheme, but the contents of the mapping table are not limited to the range shown in table 2.
Secondly, adapting the IP multicast by adopting a restricted authority access mechanism activated by TCP and route, and finishing the control and management of the server in the functional addressing mode on the access authority of the external test equipment.
As shown in fig. 2, the main steps are as follows:
(a) the external test equipment initiates a DoIP equipment discovery process to find equipment information of a server (ECU), such as an IP address;
(b) the external test equipment initiatively initiates and successfully establishes a TCP connection to a server (ECU);
(c) the external test equipment initiates a route activation request on the established TCP channel, and a request message carries the logic address information of the external test equipment;
(d) the server (ECU) judges whether the external test equipment has the authority to carry out subsequent diagnostic communication according to the logical address information of the external test equipment;
(e) if the server (ECU) judges that the external test equipment is authorized to carry out subsequent diagnosis communication, the TCP connection of the current communication is marked as valid; at the same time, according to the own function group address of the server (ECU), searching a function group address and an IP multicast mapping table, and adding the server (ECU) into a corresponding IP multicast group; the server (ECU) marks the logic address of the external test equipment as activated and binds the current TCP connection;
(f) if the server (ECU) judges that the external test equipment is not authorized to carry out subsequent diagnosis communication, the current TCP connection is disconnected, and if no external test equipment is connected to the server (ECU) at the moment, the server (ECU) exits the IP multicast group.
The logical address may be information such as an IP address, an identification number (ID) or other marks of the external test equipment, and may be predefined and set in the server (ECU).
The invention adds the flow of adapting multicast communication on the original DoIP route activation mechanism, and under the condition of successful activation, the server needs to add the corresponding IP multicast group after searching the function group address mapping table (namely table 2) under the condition of knowing the self function group address. And under the condition of failed activation, if all the clients are confirmed to be disconnected, the server needs to quit the corresponding IP multicast group.
And secondly, the external test equipment sends the diagnosis message of the function addressing communication mode to the server.
When the external test equipment needs to initiate the functional addressing mode diagnostic communication, a built-in functional group address mapping table (namely table 2) is inquired, and a target functional group address in the diagnostic message is converted into an IP multicast address.
In one embodiment, the agreed upon functional addressing communication mode uses a port number of 13401.
As shown in fig. 2 and 3, after the functional addressing mode is adopted to implement the IP multicast mode, the format of the data packet remains unchanged from the original TCP mode at the upper layer of the DoIP, in order to implement the multicast mode, the transport layer is carried on the UDP, and the target IP address of the IP layer is the IP multicast address. The upper layer diagnosis processing logic is kept unchanged, and the original processing mechanism is maximally compatible.
The IP Header (IP Header) is typically 20 bytes, and in special cases there may also be an Option (Option) field, followed by an IP data payload (data). Fig. 4 is a schematic structural diagram of an IP data load, in which a Destination Address (Destination Address) is used to fill in an IP Address of a server (ECU) when TCP is used to perform single-point one-to-one communication; when using UDP multicast, inquiring function group address and IP multicast mapping table, filling in multicast IP address corresponding to function group address of server (ECU). The other IP header fields are filled in the same way in both communication modes.
The TCP Header (TCP Header) part field is generally composed of 20 bytes, and in a special case, there may be an optional (Option) field, and the TCP Header is followed by a TCP data payload (data), as shown in fig. 5, which is a schematic structural diagram of the TCP data payload. In the DoIP protocol agreement, both single-point one-to-one communication and one-to-many communication are performed by using the TCP scheme.
The UDP Header (UDP Header) consists of fixed 8 bytes, and its structure is shown in fig. 6. The TCP protocol is designed for one-to-one communication and does not support a multicast mode; while UDP supports multicast. Therefore, when performing one-to-many communication using the multicast method, it is necessary to encapsulate a packet in accordance with the format of the UDP header using UDP.
After the IP layer external test equipment mode is changed from unicast to multicast, when the client end processes the function addressing transmission, only one time of processing is needed, only one data packet is transmitted, and when the unicast mode is not needed, one data packet is transmitted to each target node. As shown in fig. 7 and 8, after the multicast mode is adopted, the processing time of the external test device, the overall communication time, and the occupation of the system bandwidth are all improved.
And finally, after receiving the function addressing diagnosis message, the server carries out diagnosis processing.
As shown in fig. 9, the processing mechanism after the server receives the function addressing diagnosis message is as follows:
(a) the server (ECU) determines whether the logical address information of the external test device in the diagnostic message is registered, and the registration process is shown in fig. 1. If not, the server (ECU) returns a failure response code to the external test equipment, and then closes the current TCP connection; if there is a registration, the next step is entered.
(b) The server (ECU) judges whether the address of the function group in the diagnosis message is self-supported, the function address group to which the server belongs is preset, and the specific server only receives the message of the function address group to which the specific server belongs. If the function group address is unknown, the server (ECU) returns a failure response code to the external test equipment; if the functional group address is known, the next step is entered.
(c) And the server side (ECU) returns a successful response code to the external test equipment, and sends the diagnostic related data to the corresponding diagnostic processing module for the next processing.
Wherein the client logical address is registered first in the access right authentication (route activation) procedure. Only the multicast packet of the functional addressing mode sent by the client obtaining the access authority of the server can be received by the server.
The function address group to which the server belongs is preset, and the specific server only receives the message of the function address group to which the specific server belongs.
Abbreviations in the specification are mainly as follows:
TABLE 3 abbreviations
The invention uses the multicast and broadcast mode of the Ethernet IP layer/MAC layer to realize the functional addressing mode of the automobile diagnosis communication. The invention adopts a multicast mode by adopting a functional address and IP address mapping table, utilizing a limited authority access mechanism of TCP and route activation and an improved Ethernet multicast mechanism, not only meeting the safety requirement of automobile diagnosis service, but also realizing a one-to-many communication mode of an automobile Ethernet functional addressing mode, and well improving the processing time of external test equipment, the time of integral communication and the occupation of system bandwidth.
Claims (10)
1. A function addressing method of unified diagnosis service based on automobile Ethernet is characterized by comprising the following steps:
step S1, establishing a mapping table between the function group address and the IP multicast address;
step S2, completing the control of the server to the access authority of the external test equipment, and adding the server into the IP multicast group according to the mapping table;
step S3, sending a diagnosis message of the function addressing communication mode to a server in the IP multicast group, wherein the diagnosis message comprises an IP multicast address;
step S4, according to the diagnosis message of the function addressing mode, the diagnosis process is carried out;
wherein the server has a functional group address and an IP address, and the IP multicast address includes an IP address.
2. The functional addressing method for unified diagnostic service based on automotive ethernet according to claim 1, wherein said step S2 comprises:
step S21, searching the IP address of the server;
step S22, establishing a TCP connection with the server apparatus;
step S23, sending a request message for route activation, wherein the request message contains a logic address of an external test device;
step S24, judging whether the diagnosis communication can be carried out according to the logic address, if the diagnosis communication can be carried out, marking the current TCP connection as activated, and executing step S25; otherwise, go to step S26;
step S25, according to the mapping table, finding out the IP multicast address corresponding to the function group address of the server, adding the server into the IP multicast group, and marking the logic address as activated;
and step S26, disconnecting the current TCP connection, and if the external test equipment and the server have no other connection at the moment, the server quits the IP multicast group.
3. The functional addressing method of the unified diagnosis service based on the automotive ethernet according to claim 1, wherein in step S3, according to the IP multicast address in the diagnosis message, the external testing device sends the diagnosis message of the functional addressing communication mode to the server in the IP multicast group, wherein the data packet of the IP multicast address is encapsulated according to the user data packet protocol.
4. The functional addressing method for unified diagnostic service based on automotive ethernet according to claim 2, wherein said step S4 comprises:
step S41, detecting whether the logic address of the external test equipment is activated, if yes, executing the next step; otherwise, sending a failure response code to the external test equipment, and closing the current TCP connection;
step S42, judging whether the server supports the function group address corresponding to the IP multicast address in the diagnosis message, if yes, executing the next step; otherwise, sending a failure response code to the external test equipment and discarding the diagnosis message;
and step S43, sending a success response code to the external test equipment, reporting the diagnosis message to a diagnosis processing module in the server, and starting diagnosis processing.
5. An external test device for functional addressing for implementing a unified diagnostic service over automotive Ethernet,
the external test equipment sends a request message of route activation to the server, the server is added into the IP multicast group according to a mapping table between the functional group address and the IP multicast address after the route activation, and a diagnosis message of a functional addressing communication mode is sent to the server in the IP multicast group for diagnosis processing during diagnosis communication;
the server has a function group address and an IP address, and the diagnosis message contains an IP multicast address.
6. An external test device according to claim 5,
the request message contains the logic address information of the external test equipment and is used for the server to judge whether the external test equipment has the authority to carry out diagnosis communication.
7. An in-vehicle network system for functional addressing for implementing a unified diagnostic service over automotive Ethernet, comprising a gateway for diagnostic communication over an IP network and a server,
the gateway is used for establishing TCP connection between external test equipment and a server, and a mapping table between a function group address and an IP multicast address is arranged in a node which is related to a diagnosis function in the gateway;
the server receives a request message of route activation sent by external test equipment and judges whether the external test equipment has the authority to carry out diagnosis communication; and receiving the diagnosis message of the function addressing communication mode during diagnosis communication and performing diagnosis processing.
8. The vehicle network system according to claim 7,
the request message contains the logic address information of the external test equipment, and the server judges whether the external test equipment has the authority to carry out diagnosis communication according to the logic address information.
9. The vehicle network system according to claim 7,
the server comprises a diagnosis processing module inside, and can perform diagnosis processing according to the diagnosis message.
10. The vehicle network system of claim 7, wherein the external test device is communicatively connected to the server by wireless communication or wired communication;
the wireless communication at least comprises one of Wifi, 4G, 5G and Bluetooth.
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| CN201910468802.8A CN110311992B (en) | 2019-05-31 | 2019-05-31 | Function addressing method for unified diagnosis service of automobile Ethernet |
| PCT/CN2020/075781 WO2020238291A1 (en) | 2019-05-31 | 2020-02-18 | Automobile ethernet-based unified diagnostic service functional addressing method |
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| CN110311992B (en) * | 2019-05-31 | 2020-07-03 | 上海赫千电子科技有限公司 | Function addressing method for unified diagnosis service of automobile Ethernet |
| CN110913006B (en) * | 2019-11-29 | 2022-08-19 | 深圳市元征科技股份有限公司 | Remote diagnosis method and system |
| CN111404794B (en) * | 2020-03-12 | 2021-11-16 | 超越科技股份有限公司 | CAN bus network sharing system and method based on virtualization |
| CN111367746A (en) * | 2020-03-16 | 2020-07-03 | 纳瓦电子（上海）有限公司 | Test method of wireless complete machine |
| CN111474878B (en) * | 2020-04-07 | 2021-07-13 | 张根兵 | Electric drive vehicle control delay optimization method based on traversal cycle and electronic equipment |
| CN113821534A (en) * | 2020-06-19 | 2021-12-21 | 北京新能源汽车股份有限公司 | Vehicle information query method and device and diagnostic instrument |
| CN112783549A (en) * | 2021-01-08 | 2021-05-11 | 东风汽车股份有限公司 | Method for upgrading data version number of automobile electric control element |
| CN112764410B (en) * | 2021-01-19 | 2023-03-31 | 广州橙行智动汽车科技有限公司 | Vehicle-mounted controller testing device, system and method |
| CN113179195A (en) * | 2021-04-28 | 2021-07-27 | 重庆长安汽车股份有限公司 | CAN message embedded point detection method, system, device and computer readable storage medium |
| CN113485920B (en) * | 2021-07-01 | 2024-02-02 | 中瓴智行(成都)科技有限公司 | Method and device for realizing DoIP entity, readable storage medium and electronic equipment |
| CN114397871B (en) * | 2021-12-24 | 2023-10-20 | 中车大连电力牵引研发中心有限公司 | Train network communication test system based on 5G |
| CN114756585A (en) * | 2022-03-23 | 2022-07-15 | 深圳市元征科技股份有限公司 | Vehicle data acquisition method and device, electronic equipment and storage medium |
| CN115065699B (en) * | 2022-06-08 | 2024-06-07 | 深圳市元征科技股份有限公司 | Routing activation method, device, equipment and medium based on remote diagnosis |
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