Vehicle-mounted communication protection system and method based on PON (Passive Optical Network)

Abstract

The invention provides a PON network-based vehicle-mounted communication protection system and method, the system comprises an optical line terminal and a plurality of optical network units, the optical line terminal comprises a first switching module and a plurality of first passive optical network ports, and the first switching module is connected with the corresponding optical network unit through the first passive optical network ports; the optical line terminal obtains the vehicle-mounted communication data uploaded by the optical network unit through the first switching module, and is used for sending the vehicle-mounted communication data to the vehicle-mounted main control equipment through the corresponding switching port; and the optical network unit comprises a second switching module which is used for acquiring the vehicle-mounted communication data and sending the vehicle-mounted communication data to the corresponding first passive optical network port through the second passive optical network port based on the preset communication channel. According to the invention, the overall performance and reliability of the vehicle-mounted communication system are improved.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a vehicle-mounted communication protection system and method based on a PON network. Background Art

[0002] In the current automotive communication network, the Controller Area Network (CAN) bus and the Local Interconnect Network (LIN) bus are the most widely used technologies.

[0003] In the face of the growing demand for data transmission, although existing CAN and LIN bus technologies have tried to alleviate bandwidth pressure through some methods to support higher data transmission rates and larger data packet capacities, these improvements are still difficult to fully meet the needs of smart driving cars for high-bandwidth, low-latency communications.

[0004] Therefore, there is an urgent need for a PON network-based vehicle communication protection system and method to solve the above problems. Summary of the invention

[0005] In view of the problems existing in the prior art, the present invention provides a vehicle-mounted communication protection system and method based on a PON network.

[0006] The present invention provides a vehicle-mounted communication protection system based on a PON network, comprising an optical line terminal and a plurality of optical network units, wherein: The optical line terminal includes a first switching module and a plurality of first passive optical network ports, the first switching module is connected to the corresponding optical network unit through the first passive optical network port, and the switching port between the first switching module and the vehicle-mounted main control device is configured based on the vehicle-mounted network type; The optical line terminal obtains the vehicle-mounted communication data uploaded by the optical network unit through the first switching module, and is used to send the vehicle-mounted communication data to the vehicle-mounted main control device through the corresponding switching port according to the vehicle-mounted network type of the vehicle-mounted communication data; The optical network unit includes a second switching module, which is used to obtain the on-board communication data uploaded by the on-board data node, and based on a preset communication channel, send the on-board communication data to the corresponding first passive optical network port through a second passive optical network port on the second switching module, wherein the preset communication channel is a communication channel between the second passive optical network port and the corresponding first passive optical network port established based on the on-board network type of the on-board communication data.

[0007] According to a PON network-based vehicle communication protection system provided by the present invention, the first passive optical network port is communicatively connected with the corresponding one or more optical network units through an optical splitter; the optical network unit includes a plurality of the second passive optical network ports, and the vehicle network type of the vehicle communication data received or sent by the plurality of the second passive optical network ports in the same optical network unit is the same; The optical network unit is further used to construct a corresponding virtual local area network number according to the vehicle network type of the vehicle communication data, and send a target message generated by the virtual local area network number, the message sequence number label and the vehicle communication data to the optical line terminal through the corresponding preset communication channel; The optical line terminal is further used to remove the virtual local area network number and the message sequence number label in the received target message, and send the removed target message to the vehicle-mounted main control device.

[0008] According to a PON network-based vehicle-mounted communication protection system provided by the present invention, the optical network unit is also used to send the firstly received master control data as the target master control data to the corresponding vehicle-mounted data node through the second switching module when multiple second passive optical network ports receive the same master control data sent by the vehicle-mounted master control device.

[0009] According to a PON network-based vehicle communication protection system provided by the present invention, the optical line terminal is also used to send the first received vehicle communication data as the target vehicle communication data to the vehicle main control device through the first switching module when the optical network unit uploads the same vehicle communication data to the corresponding multiple first passive optical network ports.

[0010] According to a PON network-based vehicle communication protection system provided by the present invention, the MAC address learning functions corresponding to the optical line terminal and the optical network unit are in a closed state.

[0011] According to a PON network-based vehicle communication protection system provided by the present invention, the second switching module is also used to use the messages with the same MAC address and the same message sequence number received within a preset aging time as copies of the corresponding target messages.

[0012] The present invention also provides a vehicle-mounted communication protection method based on a PON network, comprising: Based on the optical line terminal, the vehicle communication data uploaded by the optical network unit is obtained through the first switching module, and according to the vehicle network type of the vehicle communication data, the vehicle communication data is sent to the vehicle main control device through the corresponding switching port between the first switching module and the vehicle main control device; Based on the optical network unit, the on-vehicle communication data uploaded by the on-vehicle data node is obtained, and based on a preset communication channel, the on-vehicle communication data is sent to the corresponding first passive optical network port on the optical line terminal through the second passive optical network port of the second switching module on the optical network unit, wherein the preset communication channel is a communication channel between the second passive optical network port and the corresponding first passive optical network port established based on the on-vehicle network type of the on-vehicle communication data.

[0013] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the vehicle-mounted communication protection method based on the PON network as described above is implemented.

[0014] The present invention also provides a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the vehicle-mounted communication protection method based on the PON network as described in any one of the above is implemented.

[0015] The present invention also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the computer program implements any of the above-mentioned vehicle-mounted communication protection methods based on the PON network.

[0016] The PON network-based vehicle communication protection system and method provided by the present invention apply the PON network to vehicle-mounted communications, realize high-bandwidth, low-latency data transmission, and ensure that data of different vehicle-mounted network types can be accurately and efficiently transmitted to the vehicle-mounted main control device through flexible switching modules and preset communication channels, thereby improving the overall performance and reliability of the vehicle-mounted communication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of a PON network-based vehicle communication protection system provided by the present invention; Figure 2 A schematic diagram of a process flow of a PON network-based vehicle communication protection method provided by the present invention; Figure 3 This is a schematic structural diagram of an electronic device provided by the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] With the rapid development of intelligent driving technology, the amount of data that needs to be transmitted by the vehicle network is increasing. For example, lidar data, camera video data, etc. The bandwidth of existing buses such as CAN and LIN can no longer meet the needs of intelligent driving vehicles. A high-bandwidth, high-reliability vehicle network is needed to meet the needs of data communication.

[0021] Figure 1 The structural diagram of the vehicle communication protection system based on the PON network provided by the present invention is as follows: Figure 1 As shown, the present invention provides a vehicle-mounted communication protection system based on a PON network, comprising an optical line terminal 101 and a plurality of optical network units 102, wherein: The optical line terminal 101 includes a first switching module 1011 and a plurality of first passive optical network ports 1012, the first switching module 1011 is connected to the corresponding optical network unit 102 through the first passive optical network port 1012, and the switching port between the first switching module 1011 and the vehicle-mounted main control device 103 is configured based on the vehicle-mounted network type; The optical line terminal 101 obtains the vehicle communication data uploaded by the optical network unit 102 through the first switching module 1011, and is used to send the vehicle communication data to the vehicle main control device 103 through the corresponding switching port according to the vehicle network type of the vehicle communication data; The optical network unit 102 includes a second switching module 1021, which is used to obtain the on-board communication data uploaded by the on-board data node 104, and based on a preset communication channel, send the on-board communication data to the corresponding first passive optical network port 1012 through the second passive optical network port 1022 on the second switching module 1021, wherein the preset communication channel is a communication channel between the second passive optical network port 1022 and the corresponding first passive optical network port 1012 established based on the on-board network type of the on-board communication data.

[0022] Passive Optical Network (PON) supports high bandwidth, for example, XGSPON can reach 10Gbps. The present invention constructs a vehicle-mounted communication protection system through a PON network, using optical fiber connection, which can avoid electromagnetic interference problems of high-speed electrical signals during wiring; at the same time, the PON network adopts a tree structure, so that each ONU communication node is isolated from each other, avoiding carrier sensing and conflict detection of each communication node of the Ethernet, and improving safety and efficiency. Optionally, in order to further improve the reliability requirements of the automotive communication network, the present invention enhances the corresponding characteristics on the basis of the standard PON network, for example, to achieve thermal protection of the communication data link.

[0023] Specifically, in the present invention, an efficient and reliable data communication protection system is constructed in a vehicle-mounted environment through PON technology, which is mainly composed of an optical line terminal 101 and multiple optical network units 102, and data distribution and aggregation are realized through an optical splitter. The present invention is designed for a vehicle-mounted environment and can process data from different vehicle-mounted data nodes 104 (such as cameras, laser radars, and safety sensors, etc.) and transmit it to a vehicle-mounted main control device 103.

[0024] The first switching module 1011 is the core component of the optical line terminal 101, and is responsible for processing all data exchanges from the ONU. The module has multiple first passive optical network ports 1012, each of which can independently communicate with one or more ONUs. In the present invention, the first switching module 1011 can also forward data to the vehicle-mounted main control device 103 through a pre-configured switching port according to the network type of the vehicle-mounted communication data (such as security data, video data, sensor data, etc.).

[0025] In the present invention, the connection between the optical line terminal 101 and the vehicle-mounted main control device 103 adopts an Ethernet data interface, and the configuration of the switching port is based on the vehicle-mounted network type, so that when receiving different types of vehicle-mounted data, the optical line terminal 101 can select the most appropriate port for transmission, thereby ensuring the efficiency and accuracy of data transmission.

[0026] In the present invention, each optical network unit 102 is equipped with a second switching module 1021 for receiving data from an on-board data node 104 (such as a camera, a laser radar, a safety sensor, etc.). These data are transmitted from the data node to the corresponding optical network unit 102 through an Ethernet interface, and are preliminarily processed in the second switching module 1021. Furthermore, the optical network unit 102 establishes a connection with the first passive optical network port 1012 of the optical line terminal 101 through the second passive optical network port 1022. In addition, based on the network type of the on-board communication data, a preset communication channel is established to ensure that the data can be transmitted to the optical network unit 102 along the correct path, so that the system can flexibly respond to the transmission requirements of different data types, while ensuring the reliability and efficiency of data transmission.

[0027] The PON network-based vehicle communication protection system provided by the present invention applies the PON network to vehicle-mounted communications, realizes high-bandwidth, low-latency data transmission, and ensures that data of different vehicle-mounted network types can be accurately and efficiently transmitted to the vehicle-mounted main control device through flexible switching modules and preset communication channels, thereby improving the overall performance and reliability of the vehicle-mounted communication system.

[0028] On the basis of the above embodiment, the first passive optical network port is communicatively connected with the corresponding one or more optical network units through an optical splitter; the optical network unit includes a plurality of the second passive optical network ports, and the vehicle network type of the vehicle communication data received or sent by the plurality of the second passive optical network ports in the same optical network unit is the same; The optical network unit is further used to construct a corresponding virtual local area network number according to the vehicle network type of the vehicle communication data, and send a target message generated by the virtual local area network number, the message sequence number label and the vehicle communication data to the optical line terminal through the corresponding preset communication channel; The optical line terminal is further used to remove the virtual local area network number and the message sequence number label in the received target message, and send the removed target message to the vehicle-mounted main control device.

[0029] In the present invention, the first passive optical network port is located on the optical line terminal and is the interface for communication between the optical line terminal and the optical network unit. Each first passive optical network port is connected to one or more corresponding optical network units through an optical splitter (a distribution and aggregation device for optical signals in a PON network) to realize a tree-shaped network structure between the optical line terminal and multiple optical network units.

[0030] Furthermore, each optical network unit is equipped with multiple second passive optical network ports (which can be configured according to actual needs, and the present invention has configured 2 ports for illustration), which are used to upload data from different vehicle-mounted data nodes (such as cameras, laser radars, safety sensors, etc.) to the optical line terminal through the PON network. In the present invention, the vehicle-mounted communication data received or sent by multiple second passive optical network ports in the same ONU have the same vehicle-mounted network type to improve the efficiency and reliability of data transmission.

[0031] Furthermore, when the optical network unit receives communication data from the vehicle data node, it will construct a corresponding virtual local area network number (VLAN ID) according to the vehicle network type of the data (such as security data, video data, etc.). The introduction of VLAN ID enables the system to distinguish different types of data and effectively isolate and manage them. For example, security sensor data is assigned to VLAN 3.

[0032] In the present invention, in addition to the VLAN ID, the optical network unit also adds a sequence number tag to the message to identify the order of the message so as to perform deduplication and sorting in the subsequent processing. In particular, in the scenario of dual-link backup, the sequence number tag can help the optical line terminal determine which message arrives first, thereby avoiding duplicate processing of data.

[0033] After the VLAN ID and message sequence number tags are added, the optical network unit sends the target message generated by these tags and the vehicle communication data to the optical line terminal through the preset communication channel (i.e., the communication path between the second passive optical network port and the first passive optical network port based on the vehicle network type established previously). When the optical line terminal receives the target message from the optical network unit, the switching module of the optical line terminal will first identify the VLANID and message sequence number tags in the message; then, according to the system configuration and strategy, these tags are removed to restore the original vehicle communication data. The specific Ethernet message format carrying VLAN tags and sequence number tags can be found in Table 1: Table 1 Ethernet message format of VLAN tag and sequence number tag

[0034] As shown in Table 1, the standard Ethernet message source MAC field is followed by two bytes 0x8100 to indicate that the message carries a VLAN. The VLAN ID is represented by 12 bits after 0x8100. A Sequence Number tag 0xA123 is added after the VLAN ID, followed by 16 bits to identify the message sequence number, where the message sequence number is accumulated.

[0035] After removing the VLAN ID and message sequence number tags, the optical line terminal forwards the processed target message (i.e., the original vehicle communication data) to the vehicle main control device. In the present invention, the optical line terminal determines which message arrives first according to the message sequence number tag, and only forwards the first message to the main control device, while the later message will be discarded, thereby ensuring the uniqueness and orderliness of the data. If only one link works normally, the optical line terminal will directly forward the message on the link to the main control device.

[0036] Based on the above embodiment, the optical network unit is also used to send the first received master control data as the target master control data to the corresponding on-board data node through the second switching module when multiple second passive optical network ports receive the same master control data sent by the on-board master control device.

[0037] In the present invention, for the vehicle-mounted communication system, in order to enhance the reliability and redundancy of data transmission, the vehicle-mounted master control device can send the same master control data to the optical network unit through different paths (i.e., different PON links). These different paths correspond to multiple second passive optical network ports (i.e., PON ports) on the optical network unit, and each PON port is connected to an independent optical fiber link. The second switching module in the optical network unit processes the data received from the multiple second passive optical network ports, and then sorts the data according to the arrival time. According to the principle of "first arrival", the first arrived master control data is regarded as the target master control data, and is prepared to be forwarded to the downstream vehicle-mounted data node, thereby ensuring the timeliness and consistency of the data and avoiding potential problems caused by data duplication or conflict.

[0038] After determining the target master control data, the second switching module will forward it to the corresponding vehicle data node, which can be various sensors, controllers or other devices on the vehicle that need to receive master control instructions. In this way, the master control device can effectively control and manage various devices and systems on the vehicle to ensure the normal operation and safety of the vehicle. If a PON link fails or is interrupted, other links can still ensure the normal transmission of the master control data, so that the system can automatically adapt to network changes and ensure the continuity and integrity of the data.

[0039] Based on the above embodiment, the optical line terminal is also used to send the first received vehicle communication data as the target vehicle communication data to the vehicle main control device through the first switching module when the optical network unit uploads the same vehicle communication data to the corresponding multiple first passive optical network ports.

[0040] In the present invention, the switching module of the optical line terminal receives two messages with the same VLAN number (such as the data uploaded by the sensor, the corresponding VLAN number is VLAN 3) and sequence number tags, wherein the VLAN 3 tag is used to identify that these messages belong to the same virtual local area network, and the sequence number tag is used to ensure the order and deduplication of the messages. When the switching module of the optical line terminal receives these two messages, since they have the same VLAN number and sequence number tag, the switching module can recognize that they are duplicates.

[0041] Furthermore, the first message to arrive will be marked as valid and forwarded to the upstream master device. The master device is the central control point of the network, responsible for processing and managing the data flow in the network. The messages that arrive later will be discarded by the switching module because they are considered to be duplicates to avoid network congestion and data redundancy. If only one link is normal, in this case, the switching module of the optical line terminal will only receive a message with VLAN 3 and a sequence number tag. Since there are no duplicate messages to be processed, the switching module will process this message according to the normal processing flow, so there is no need to check whether the message is duplicated. This message will be forwarded directly to the upstream master device.

[0042] Based on the above embodiment, the MAC address learning functions corresponding to the optical line terminal and the optical network unit are respectively in a closed state.

[0043] The PON network is usually designed so that the broadcast domains are distinguished by VLANs, and each optical network unit is added to one or more broadcast domains through a specific VLAN identifier. In the present invention, the MAC address learning function of the switch modules of the optical network unit and the optical line terminal is turned off to ensure that the data message can be broadcast in a predetermined manner, rather than forwarded based on a dynamically learned MAC address table.

[0044] After turning off the MAC address learning function, the switching module will broadcast the received data frames to all ports belonging to the same VLAN, instead of forwarding them to specific ports based on the MAC address table, so that all optical network units in the same VLAN can receive the broadcast data and meet the needs of network services.

[0045] On the basis of the above embodiment, the second switching module is further used to use the messages with the same MAC address and the same message sequence number received within a preset aging time as the copies of the corresponding target messages.

[0046] In the present invention, in the vehicle-mounted communication protection system based on the PON network, the switching modules in the optical network unit and the optical line terminal process messages with serial number labels. Such serial number labels are used to uniquely identify a message instance so as to distinguish different messages or multiple copies of messages in the network.

[0047] When the switching module receives a message with a sequence number tag, it will record the source MAC address and sequence number tag of the message. If the switching module receives a message with the same source MAC address and the same message sequence number again within the preset aging time, it will regard these messages as copies of the target message received previously. The aging time defines the time window for the switching module to identify message copies. If the source MAC and sequence number tags of two messages are the same, but the time interval between their arrival exceeds the aging time, the switching module will not regard them as copies of the same message. In the present invention, the aging time can be set according to the actual situation and needs of the network. By detecting and discarding unnecessary message copies, network congestion and delay can be reduced, and the overall performance of the network can be improved.

[0048] In one embodiment, the vehicle-mounted communication protection system based on the PON network provided by the present invention is generally described as follows: In the embodiment, the PON network is composed of an OLT, an ONU and a connected optical splitter, wherein the OLT has multiple PON ports (ie, first passive optical network ports), each PON port is connected to multiple ONUs via an optical splitter, and a tree structure is adopted.

[0049] ONU connects to data nodes (i.e., on-board data nodes), such as cameras, lidars, and safety sensors, and ONU communicates with these data nodes using Ethernet data interfaces. At the same time, the data interface between OLT and the main control device is also Ethernet.

[0050] In this embodiment, in order to distinguish various vehicle communication data, the network can be divided by VLAN, for example, VLAN 3 is used for safety sensors and VLAN 4 is used for laser radar. When the safety sensor data needs to be transmitted through the PON network, the ONU side adds VLAN 3 to the received sensor data through Ethernet messages and transmits it uplink to the OLT. After the OLT strips VLAN 3, it transfers it to the main control device.

[0051] In this embodiment, in order to protect communication data, each ONU can be registered at two PON ports of the OLT at the same time. Taking the sensor node as an example, when the sensor data enters the ONU, the switching module of the ONU (i.e., the second switching module) tags the received message as follows: including VLAN 3 and the message sequence number tag, and forwards it to the two PON ports respectively (the switch module ports corresponding to the two PON ports are added to VLAN 3). If both links are normal, the switching module of the OLT (i.e., the first switching module) will receive two identical messages carrying VLAN 3 and sequence number tags, among which the first received message is forwarded to the upstream master device, and the later one is discarded. If only one link is normal, the switching module of the OLT will receive a message carrying VLAN 3 and the sequence number tag, and the message is directly forwarded to the upstream master device.

[0052] As for the data sent from the master device, it is tagged with VLAN 3 and the message sequence number through the OLT switch module and forwarded to the two corresponding PON ports (the switch module ports corresponding to these two PON ports are added to VLAN 3). If both links are normal, the ONU switch module will receive two identical messages with VLAN 3 and sequence number tags. Similarly, the ONU will forward the first received message to the downstream sensor node, and the later one will be discarded. If only one link is normal, the ONU switch module will receive a message with VLAN 3 and sequence number tags, and the message will be directly forwarded to the downstream sensor node.

[0053] It should be noted that, in this embodiment, the MAC address learning function has been disabled in the switch modules of the ONU and OLT, so that data packets can be forwarded to all ports in the same broadcast domain, rather than only to the ports recorded in the MAC address table. In this embodiment, the same broadcast domain is distinguished by VLAN, and when the switch module port joins a VLAN, it is in this broadcast domain.

[0054] Figure 2 The flowchart of the vehicle communication protection method based on the PON network provided by the present invention is as follows: Figure 2 As shown, the present invention provides a vehicle-mounted communication protection method based on a PON network, comprising: Step 201, based on the optical line terminal, obtain the vehicle communication data uploaded by the optical network unit through the first switching module, and send the vehicle communication data to the vehicle main control device through the corresponding switching port between the first switching module and the vehicle main control device according to the vehicle network type of the vehicle communication data; Step 202: Based on the optical network unit, the on-vehicle communication data uploaded by the on-vehicle data node is obtained, and based on a preset communication channel, the on-vehicle communication data is sent to the corresponding first passive optical network port on the optical line terminal through the second passive optical network port of the second switching module on the optical network unit, wherein the preset communication channel is a communication channel between the second passive optical network port and the corresponding first passive optical network port established based on the on-vehicle network type of the on-vehicle communication data.

[0055] OLT is the core device of PON network, located on the network side, responsible for controlling and managing the entire network. In the present invention, OLT is used to receive and distribute vehicle communication data. OLT receives vehicle communication data uploaded from ONU through its first switching module. These data include various types such as vehicle operation status, sensor information and passenger information, which are transmitted from the data node in the vehicle to ONU through the optical fiber link, and then uploaded to OLT by ONU.

[0056] In the present invention, the ONU obtains vehicle communication data from vehicle data nodes (such as sensors, ECUs, etc.), and these data can be transmitted to the ONU via a wired or wireless network inside the vehicle (such as an in-vehicle local area network).

[0057] After the ONU obtains the data, it will send the vehicle communication data to the corresponding first passive optical network port on the OLT through the second passive optical network port (one or more PON ports) of the second switching module according to the preset communication channel. In the present invention, the preset communication channel is dynamically established based on the vehicle network type of the vehicle communication data, ensuring that the data can be accurately transmitted to the OLT through the PON network.

[0058] After receiving the data, the OLT uses the first switching module to send the data to the vehicle-mounted main control device through specific switching ports (these ports correspond to different types of vehicle-mounted communication data).

[0059] The PON network-based vehicle communication protection method provided by the present invention applies the PON network to vehicle-mounted communications, realizes high-bandwidth, low-latency data transmission, and ensures that data of different vehicle-mounted network types can be accurately and efficiently transmitted to the vehicle-mounted main control device through flexible switching modules and preset communication channels, thereby improving the overall performance and reliability of the vehicle-mounted communication system.

[0060] Figure 3 A schematic diagram of the structure of an electronic device provided by the present invention, such as Figure 3As shown, the electronic device may include: a processor (Processor) 301, a communication interface (Communications Interface) 302, a memory (Memory) 303 and a communication bus 304, wherein the processor 301, the communication interface 302, and the memory 303 communicate with each other through the communication bus 304. The processor 301 can call the logic instructions in the memory 303 to execute the vehicle-mounted communication protection method based on the PON network, which includes: based on the optical line terminal, obtaining the vehicle-mounted communication data uploaded by the optical network unit through the first switching module, and according to the vehicle-mounted network type of the vehicle-mounted communication data, sending the vehicle-mounted communication data to the vehicle-mounted main control device through the corresponding switching port between the first switching module and the vehicle-mounted main control device; based on the optical network unit, obtaining the vehicle-mounted communication data uploaded by the vehicle-mounted data node, and based on the preset communication channel, sending the vehicle-mounted communication data to the corresponding first passive optical network port on the optical line terminal through the second passive optical network port of the second switching module on the optical network unit, wherein the preset communication channel is a communication channel between the second passive optical network port and the corresponding first passive optical network port established based on the vehicle network type of the vehicle-mounted communication data.

[0061] In addition, the logic instructions in the above-mentioned memory 303 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0062] On the other hand, the present invention also provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute the vehicle-mounted communication protection method based on the PON network provided by the above methods, the method comprising: based on the optical line terminal, obtaining the vehicle-mounted communication data uploaded by the optical network unit through the first switching module, and according to the vehicle-mounted network type of the vehicle-mounted communication data, sending the vehicle-mounted communication data to the vehicle-mounted main control device through the corresponding switching port between the first switching module and the vehicle-mounted main control device; based on the optical network unit, obtaining the vehicle-mounted communication data uploaded by the vehicle-mounted data node, and based on the preset communication channel, sending the vehicle-mounted communication data to the corresponding first passive optical network port on the optical line terminal through the second passive optical network port of the second switching module on the optical network unit, wherein the preset communication channel is a communication channel between the second passive optical network port and the corresponding first passive optical network port established based on the vehicle-mounted network type of the vehicle-mounted communication data.

[0063] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which is implemented when the computer program is executed by the processor to execute the vehicle-mounted communication protection method based on the PON network provided in the above-mentioned embodiments, the method comprising: based on the optical line terminal, obtaining the vehicle-mounted communication data uploaded by the optical network unit through the first switching module, and according to the vehicle-mounted network type of the vehicle-mounted communication data, sending the vehicle-mounted communication data to the vehicle-mounted main control device through the corresponding switching port between the first switching module and the vehicle-mounted main control device; based on the optical network unit, obtaining the vehicle-mounted communication data uploaded by the vehicle-mounted data node, and based on the preset communication channel, sending the vehicle-mounted communication data to the corresponding first passive optical network port on the optical line terminal through the second passive optical network port of the second switching module on the optical network unit, wherein the preset communication channel is a communication channel between the second passive optical network port and the corresponding first passive optical network port established based on the vehicle-mounted network type of the vehicle-mounted communication data.

[0064] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0065] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vehicle communication protection system based on a PON network, characterized in that: It includes an optical line terminal and multiple optical network units, wherein: The optical line terminal includes a first switching module and a plurality of first passive optical network ports, the first switching module is connected to the corresponding optical network unit through the first passive optical network port, and the switching port between the first switching module and the vehicle-mounted main control device is configured based on the vehicle-mounted network type; The optical line terminal obtains the vehicle-mounted communication data uploaded by the optical network unit through the first switching module, and is used to send the vehicle-mounted communication data to the vehicle-mounted main control device through the corresponding switching port according to the vehicle-mounted network type of the vehicle-mounted communication data; The optical network unit includes a second switching module, which is used to obtain the on-board communication data uploaded by the on-board data node, and based on a preset communication channel, send the on-board communication data to the corresponding first passive optical network port through a second passive optical network port on the second switching module, wherein the preset communication channel is a communication channel between the second passive optical network port and the corresponding first passive optical network port established based on the on-board network type of the on-board communication data.

2. The vehicle-mounted communication protection system based on the PON network according to claim 1, characterized in that: The first passive optical network port is communicatively connected with the corresponding one or more optical network units through an optical splitter; the optical network unit includes a plurality of the second passive optical network ports, and the vehicle network type of the vehicle communication data received or sent by the plurality of the second passive optical network ports in the same optical network unit is the same; The optical network unit is further used to construct a corresponding virtual local area network number according to the vehicle network type of the vehicle communication data, and send a target message generated by the virtual local area network number, the message sequence number label and the vehicle communication data to the optical line terminal through the corresponding preset communication channel; The optical line terminal is further used to remove the virtual local area network number and the message sequence number label in the received target message, and send the removed target message to the vehicle-mounted main control device.

3. The vehicle-mounted communication protection system based on the PON network according to claim 2 is characterized in that: The optical network unit is also used to send the first received master control data as the target master control data to the corresponding on-board data node through the second switching module when multiple second passive optical network ports receive the same master control data sent by the on-board master control device.

4. The vehicle-mounted communication protection system based on the PON network according to claim 2, characterized in that: The optical line terminal is also used to send the first received vehicle communication data as the target vehicle communication data to the vehicle main control device through the first switching module when the optical network unit uploads the same vehicle communication data to the corresponding multiple first passive optical network ports.

5. The vehicle-mounted communication protection system based on the PON network according to claim 1, characterized in that: The MAC address learning functions corresponding to the optical line terminal and the optical network unit are in a closed state.

6. The vehicle-mounted communication protection system based on the PON network according to claim 2, characterized in that: The second switching module is further configured to use the messages with the same MAC address and the same message sequence number received within a preset aging time as the copies of the corresponding target messages.

7. A vehicle communication protection method based on a PON network, characterized in that: include: Based on the optical line terminal, the vehicle communication data uploaded by the optical network unit is obtained through the first switching module, and according to the vehicle network type of the vehicle communication data, the vehicle communication data is sent to the vehicle main control device through the corresponding switching port between the first switching module and the vehicle main control device; Based on the optical network unit, the on-vehicle communication data uploaded by the on-vehicle data node is obtained, and based on a preset communication channel, the on-vehicle communication data is sent to the corresponding first passive optical network port on the optical line terminal through the second passive optical network port of the second switching module on the optical network unit, wherein the preset communication channel is a communication channel between the second passive optical network port and the corresponding first passive optical network port established based on the on-vehicle network type of the on-vehicle communication data.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the vehicle-mounted communication protection method based on the PON network as claimed in claim 7 is implemented.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor, the vehicle-mounted communication protection method based on the PON network as claimed in claim 7 is implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by the processor, the vehicle-mounted communication protection method based on the PON network as claimed in claim 7 is implemented.

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