CN111654359B - Hot standby redundant communication system and method - Google Patents

Abstract

The invention provides a hot standby redundant communication system and a method, wherein the system comprises the following steps: the first and second network switching devices, the first and second optical convergence devices and the hot standby redundant communication device; the first network switching equipment is respectively connected with the first optical convergence equipment and the second network switching equipment; the second network switching equipment is connected with the second optical convergence equipment; the first light converging device and the second light converging device are respectively connected with the hot standby redundant communication device; the hot standby redundant communication device is respectively connected with the first CAN bus communication link and the second CAN bus communication link to be connected with terminal control equipment; the hot standby redundant communication device is used for switching to an optical fiber standby link to transmit optical signals when the optical fiber main link fails; and is used for switching to the second CAN bus link to transmit bus signals when the first CAN bus link fails; and switching to the corresponding standby interface to transmit the bus signal when any main interface fails. The invention can realize the hot standby redundancy of the communication link and ensure the high stability and the high reliability of data transmission.

Description

Hot standby redundant communication system and method

technical field

The invention relates to the technical field of distributed control systems, in particular to a hot standby redundant communication system and method.

Background technique

At present, the single-light monitoring system used in various airports mainly includes the single-light monitoring system based on power carrier communication and the single-light monitoring system based on optical fiber communication. For the single lamp monitoring system based on power carrier communication, the communication link adopts the existing power line system. Although the construction is simple, the complex environment affects the communication bandwidth and signal-to-noise ratio of the power line, resulting in the reliability and stability of data communication. bad. For a single-light monitoring system based on optical fiber communication, the communication link needs to be laid with optical fiber. The optical fiber communication link has the advantages of strong anti-interference ability and large data communication bandwidth.

However, in the construction process of the single-light monitoring system based on optical fiber communication, it is necessary to ensure the reliability of the optical fiber link and reduce the system construction cost. The design and construction adopt the cold standby redundancy of the optical fiber link. If a single optical fiber link is damaged during operation, maintenance personnel need to adjust the backup optical fiber link on site, and the real-time performance of redundant backup is not high.

For the single-lamp monitoring unit in the single-lamp monitoring system based on optical fiber communication, due to the volume limitation of the isolation transformer bucket in the installation environment, the poor waterproof effect of the optical fiber tail cable and the high price of the optical module, the single-lamp monitoring unit has not realized single node hot standby redundancy. And when installing the fiber optic connector of the single-lamp monitoring unit on site, the waterproof process of the optical interface is difficult and is easily affected by the installation process. It is extremely difficult for the single-lamp monitoring unit to achieve a good waterproof effect. After long-term operation, water vapor may enter due to Optical fiber connectors affect light attenuation. In addition, the price of optical modules and fiber optic pigtail connectors is relatively high, which increases system costs.

Contents of the invention

In view of this, the present invention provides a hot standby redundant communication system and method, so as to realize hot standby redundancy of communication links and ensure high stability and high reliability of data transmission.

In one aspect, the present invention provides a hot standby redundant communication system, including: a first network switching device, a second network switching device, a first optical convergence device, a second optical convergence device, and a hot standby redundant communication device; The hot standby redundant communication device is used for conversion of optical signals and electrical signals, and the hot standby redundant communication device includes a second optical communication interface, a fourth optical communication interface, a first CAN communication interface, a second CAN communication interface, a second CAN communication interface, and a second CAN communication interface. Three CAN communication interfaces and a fourth CAN communication interface; the first network switching device is connected to the first optical convergence device and the second network switching device respectively; the second network switching device is connected to the second optical convergence device; The first optical converging device is connected to the second optical communication interface of the hot standby redundant communication device through the first optical communication interface; the second optical converging device is connected to the hot standby redundant communication device through the third optical communication interface. The fourth optical communication interface of the communication device; the hot standby redundant communication device is directly connected to the first CAN bus communication link through the first CAN communication interface and the second CAN communication interface, and through the third CAN communication interface and the fourth CAN The communication interface is directly connected to the second CAN bus communication link; the first CAN bus communication link and the second CAN bus communication link are used to respectively connect the terminal control equipment; the second optical converging equipment communicates with the fourth optical The communication link between the interfaces is used as the main optical fiber link, and the communication link between the first optical convergence device and the second optical communication interface is used as the optical fiber backup link; the first CAN bus communication link is used as the CAN bus The main link, the second CAN bus standby communication link is used as the CAN bus standby link; the first CAN communication interface is used as the main interface of the CAN bus main link, and the second CAN communication interface is used as the CAN bus main chain The backup interface of the road; the fourth CAN communication interface is used as the main interface of the CAN bus backup link, and the third CAN communication interface is used as the backup interface of the CAN bus backup link; the hot standby redundant communication device is used for When the optical fiber main link fails, switch to the optical fiber backup link to transmit optical signals; and when the CAN bus main link fails, switch to the CAN bus backup link to transmit CAN bus signals; And when any of the main interfaces fails, switch to the corresponding standby interface to transmit the CAN bus signal.

Further, the hot standby redundant communication device is specifically configured to switch to the second optical aggregation device and the fourth optical communication interface when the communication link between the first optical aggregation device and the second optical communication interface fails. The communication link between the optical communication interfaces transmits optical signals, and transmits CAN bus signals to the terminal control device via the first CAN communication interface.

Further, the hot standby redundant communication device is specifically further configured to communicate with the second optical communication device via the first optical aggregation device when the communication link between the fourth optical communication interface and the terminal control device fails. The communication link between the interfaces transmits optical signals, and transmits CAN bus signals to the terminal control device via the fourth CAN communication interface.

Further, the hot standby redundant communication device is also specifically configured to communicate with the fourth optical communication device via the second optical aggregation device when the communication link between the first optical aggregation device and the terminal control device fails. The communication link between the interfaces transmits optical signals, and transmits CAN bus signals to the terminal control device via the fourth CAN communication interface.

Further, the hot standby redundant communication system further includes: a first optical module, a first PYH/switch chip, a first controller, a first isolation chip, a first CAN transceiver, a first protection circuit, a second Isolation chip, second CAN transceiver, second protection circuit; second optical module, second PYH/switch chip, second controller, third isolation chip, third CAN transceiver, third protection circuit, fourth isolation chip, the fourth CAN transceiver and the fourth protection circuit; the first optical module, the first PYH/switching chip, the first controller, the first isolation chip, the first CAN transceiver and the first protection circuit are connected in sequence, The first optical module is also connected to the second optical communication interface, and the first protection circuit is also directly connected to the first CAN bus communication link through the first CAN communication interface; the second isolation chip, the second The CAN transceiver and the second protection circuit are connected sequentially, the second isolation chip is also connected to the first controller, and the second protection circuit is also directly connected to the first CAN bus through the second CAN communication interface (B4) Communication link; the second optical module, the second PYH/switching chip, the second controller, the third isolation chip, the third CAN transceiver and the third protection circuit are connected in sequence, and the second optical module is also connected to the The fourth optical communication interface, the third protection circuit is also directly connected to the first CAN bus communication link through the fourth CAN communication interface; the fourth isolation chip, the fourth CAN transceiver and the fourth protection circuit in turn The fourth isolation chip is also connected to the second controller, and the fourth protection circuit is also directly connected to the second CAN bus communication link through the third CAN communication interface.

Further, the terminal control device includes an MCU controller, a main isolation chip, a backup isolation chip, a main CAN transceiver, a backup CAN transceiver, a main protection circuit and a backup protection circuit; the main isolation chip, the main CAN transceiver, and the main The protection circuit is connected sequentially, the main isolation chip is also connected with the MCU controller, the main protection circuit is connected to the first CAN bus communication link; the backup isolation chip, the backup CAN transceiver and the backup protection circuit are connected in sequence, The standby isolation chip is also connected to the MCU controller, and the standby protection circuit is connected to the second CAN bus communication link.

Further, there are multiple terminal control devices, and the MCU controller of each terminal control device is correspondingly connected to one airport lamp.

On the other hand, the present invention also provides a hot standby redundancy method, which is applied to the system, and the method includes:

When the optical fiber main link, the CAN bus main link and the main interface of the CAN bus main link are all working normally, the optical fiber main link transmits optical signals, and the conversion of optical signals and electrical signals is performed through the hot standby redundant communication device , transmitting electrical signals to the CAN bus main link via the main interface of the CAN bus main link and the electrical signal; when the optical fiber main link fails, the hot standby redundant communication device switches to the optical fiber backup link transmit optical signals; and when the main link of the CAN bus fails, switch to the backup link of the CAN bus to transmit the CAN bus signal; and when any main interface fails, switch to the corresponding standby interface to transmit the CAN bus signal .

Further, the hot standby redundant communication method further includes: when the communication link between the first optical convergence device and the second optical communication interface fails, the hot standby redundant communication device switches to The communication link between the second optical convergence device (104) and the fourth optical communication interface transmits optical signals, and transmits CAN bus signals to the terminal control device via the first CAN communication interface.

Further, the hot standby redundant communication method further includes: when the communication link between the fourth optical communication interface and the terminal control device fails, the hot standby redundant communication device sends The communication link between an optical convergence device and the second optical communication interface transmits optical signals, and transmits CAN bus signals to the terminal control device via the fourth CAN communication interface; and, at the first optical convergence device When the communication link with the terminal control device fails, the optical signal is transmitted through the communication link between the second optical convergence device and the fourth optical communication interface, and the CAN bus signal is transmitted through the fourth CAN communication interface. signal to the terminal control device.

The hot standby redundant communication system and method of the present invention adopts optical fiber communication technology for long-distance transmission and trunk communication of large-capacity data; and uses CAN (Controller AreaNetwork) communication technology for short-distance transmission and branch communication of small-capacity data, Not only has the advantages of long-distance transmission of the single-lamp monitoring system based on optical fiber communication, but also uses CAN communication technology to replace the optical module on the single-lamp monitoring unit with a CAN transceiver, which can reduce the cost of the single-lamp monitoring unit and integrate the monitoring unit The optical fiber waterproof pigtail cable is replaced by a cable connector, which can reduce the waterproof complexity of the single-lamp monitoring unit, which greatly facilitates the maintenance of on-site workers; it can also realize the hot standby redundancy of the communication link of the single-lamp monitoring system, and improve the original optical fiber communication link. road reliability.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. Those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of a hot standby redundant communication system according to an exemplary first embodiment of the present invention;

2 is a schematic structural diagram of a hot standby redundant communication device in a hot standby redundant communication system according to a second exemplary embodiment of the present invention;

3 is a schematic structural diagram of a terminal control device in a hot standby redundant communication system according to a third exemplary embodiment of the present invention;

FIG. 4 is a flowchart of a hot standby redundant communication method according to an exemplary fourth embodiment of the present invention;

5 is a flowchart of a hot standby redundant communication method according to an exemplary fifth embodiment of the present invention;

Fig. 6 is a flowchart of a hot standby redundant communication method according to an exemplary sixth embodiment of the present invention.

Detailed ways

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

It should be noted that, in the case of no conflict, the following embodiments and the features in the embodiments can be combined with each other; and, based on the embodiments in the present disclosure, those of ordinary skill in the art obtained without creative work All other embodiments belong to the protection scope of the present disclosure.

It is noted that the following describes various aspects of the embodiments that are within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is illustrative only. Based on the present disclosure one skilled in the art should appreciate that an aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, any number of the aspects set forth herein can be used to implement an apparatus and/or practice a method. In addition, such an apparatus may be implemented and/or such a method practiced using other structure and/or functionality than one or more of the aspects set forth herein.

As shown in FIG. 1 , a hot standby redundant communication system of the present invention is explained by taking the terminal control device as a single-light monitoring unit in the field of navigation lighting as an example, and multiple lamps are also shown for easy understanding. It should be noted that the hot standby redundant communication system of the present invention can also be applied to other types of terminal control devices, and should not be construed as limiting. The hot standby redundant communication system includes: network switching equipment (main) 101, network switching equipment (standby) 102, optical convergence equipment (main) 103, optical convergence equipment (standby) 104, hot standby redundant communication device 105, single A lamp monitoring unit (1) 106, a single lamp monitoring unit (n) 107, a lamp (1) 108 and a lamp (n) 109.

One port of the network switching device (main) 101 is directly connected to the optical aggregation device (main) 103 through an Ethernet network cable, and the other port is connected to the Ethernet switching device (standby) 102 . The network switching device (master) 101 can be an industrial switch, and is used for data forwarding and switching of the main communication link, or data forwarding and switching of the network switching device (standby) 102 . One port of the network switching device (standby) 102 is directly connected to the optical aggregation device (standby) 104 through an Ethernet network cable, and the other port is connected to the Ethernet switching device (main) 101 for conversion and forwarding of optical data and electrical data , the data forwarding and switching of the standby communication link, or the data forwarding and switching of the network switching device (master) 101, an industrial grade switch can be selected during design. The optical aggregation device (main) 103 is connected with the network switching device (main) 101 through the Ethernet interface, and connected with the optical communication interface B1 of the hot standby redundant communication device 105 through the optical communication interface A1, and is used for optical communication on the main communication link. Signal and electrical signal conversion, to realize the reception and forwarding of upper-layer electrical data and lower-layer optical data, OLT (Optical Line Terminal, optical line terminal equipment) equipment or optical switch can be selected during design.

The optical aggregation device (preparation) 104 is connected to the network switching device (preparation) 102 through the Ethernet port, and is connected to the optical communication interface B2 of the hot standby redundant communication device 105 through the optical communication interface A2, and is used for optical communication on the standby communication link. Signal and electrical signal conversion, realize the reception and forwarding of upper layer electrical data and lower layer optical data, OLT equipment or optical switch can be selected during design. The hot standby redundant communication device 105 is used for converting optical data and CAN data, and provides a hot standby redundant function. When the main communication link on one side fails, switch to the backup communication link through the hot standby redundant communication device. Each single lamp monitoring unit is used for exchanging the data of the hot standby redundant communication device 105, and can realize the monitoring and control functions of the respective connected lamps.

Specifically, the B1 optical communication interface on the upper end of the hot standby redundant communication device 105 is connected to the optical aggregation device 103 on the main communication link, and the B2 optical communication interface on the upper end is connected to the optical aggregation device (standby) 104 on the standby communication link, The B3CAN communication interface at the lower end is directly connected to the CAN bus main communication link, and the B4CAN communication interface is also directly connected to the CAN bus main communication link for data transmission on the CAN bus main communication link to realize the CAN bus main communication link The CAN interface of the road is hot standby redundant. When the B3CAN communication interface fails, it will automatically switch to the B4CAN communication interface to continue data transmission; the B5CAN communication interface at the lower end is directly connected to the CAN bus standby communication link, and the B6CAN communication interface is also directly Connected to the CAN bus standby communication link, used for data transmission of the CAN bus standby communication link, realizing the hot standby redundancy of the CAN interface on the CAN bus standby communication link, when the B5CAN communication interface fails, it will automatically switch to the B6CAN Communication Interface. Thus, the hot standby redundant communication device realizes the conversion of light data and CAN data and the hot standby redundancy of the communication link of the single lamp monitoring system. The single lamp monitoring unit (1) 106 is connected to the CAN bus main communication link through the C1CAN communication interface, and is connected to the CAN bus standby communication link through the C2CAN communication interface, and is used for the single lamp monitoring unit (1) 106 to receive and send data, to realize For the monitoring and control of lamps, when the C1CAN communication interface or the CAN bus main communication link fails, the monitoring and control of lamps can be realized through the C2CAN communication interface. The single-lamp monitoring unit (n) 107 has the same hardware structure as the single-lamp monitoring unit (1) 106, and is connected to the CAN bus standby communication link through the Cn+1CAN communication interface, and is connected to the CAN bus standby communication link through the Cn+2CAN communication interface connected to the road for the single lamp monitoring unit (n) 107 to receive and send data. When the Cn+1CAN communication interface or CAN bus main communication link fails, the monitoring and control of lamps can be realized through the Cn+2CAN communication interface. Each lamp can be directly connected to the corresponding single lamp monitoring unit through a secondary cable, and is used to provide visual navigation aid function for the airport flight area at night or in low visibility conditions.

This embodiment adopts optical fiber communication technology for long-distance transmission and trunk communication of large-capacity data; for short-distance transmission and branch communication of small-capacity data, CAN communication technology is used, which not only has a long-distance single-lamp monitoring system based on optical fiber communication The advantages of transmission, while using CAN communication technology, can replace the optical module on the single-light monitoring unit with a CAN transceiver, which can reduce the cost of the single-light monitoring unit, and replace the optical fiber waterproof tail cable on the monitoring unit with a cable connector, which can reduce The single-light monitoring unit is waterproof and complex, which greatly facilitates the maintenance of on-site workers; it can also realize the hot backup redundancy of the communication link of the single-light monitoring system, and improve the reliability of the original optical fiber communication link.

FIG. 2 provides a schematic structural view of a hot standby redundant communication device in a hot standby redundant communication system according to an exemplary second embodiment of the present invention. As shown in FIG. 2 , the hot standby redundant communication device includes: an optical module (main) 200 , PYH/switch chip (main) 202 (PHY, namely Physical, port physical layer), MCU1 controller (main) 204, isolation chip A1 (main) 206, CAN transceiver A1 (main) 207, protection circuit A1 (main) ) 208, isolation chip A2 (preparation) 209, CAN transceiver A2 (preparation) 210, protection circuit A2 (preparation) 211; optical module (preparation) 201, PYH/switching chip (preparation) 203, MCU2 controller (preparation) 205, isolation chip B1 (main) 212, CAN transceiver B1 (main) 213, protection circuit B1 (main) 214, isolation chip B2 (backup) 215, CAN transceiver B2 (backup) 216 and protection circuit B2 (backup) 217.

Among them, one end of the optical module (main) 200 is directly connected to the optical aggregation device (main) 103 through an optical fiber, and the other end is directly connected to the PHY/switch chip (main) 202 through an electrical port, which is used for the conversion of optical signals and electrical signals. For the long-distance transmission of backbone data on the communication link, the optical module of single-mode communication can be selected during design. One end of the optical module (preparation) 201 is directly connected to the optical convergence device (preparation) 104 through the optical fiber, and the other end is directly connected to the PHY/switching chip (preparation) 203 through the electrical port, which is used for the conversion of optical signals and electrical signals. For the long-distance transmission of backbone data on the standby communication link, the optical module of single-mode communication can be selected during design. The analog interface on one side of the PHY/switching chip (main) 202 is connected to the optical module (main) 200, and the digital interface MII or RMII interface on the other side is connected to the MCU1 controller (main) 204 for the conversion of digital signals and analog signals to realize For data exchange between the physical layer and the data link layer, PYH chips or switching chips can be selected during design. The analog interface on one side of the PHY/switching chip (preparation) 203 is connected to the optical module (preparation) 201, and the digital interface MII or RMII interface on the other side is connected to the MCU1 controller (main) 205 for conversion of digital signals and analog signals To realize the data exchange between the physical layer and the data link layer, the PYH chip or the switching chip can be selected during design. MCU1 controller (main) 204 can be embedded chip, and this chip can have network interface, CAN interface, UART interface and SPI interface etc., is used for the conversion of upper end and lower end data, realizes the data transmission of main communication link, and backup The communication link exchanges data.

The RMII/MII interface of the MCU1 controller (main) 204 is connected with the PHY/switching chip (main) 202, the CAN1 interface is connected with the isolation chip A1 (main) 206, the CAN2 interface is connected with the isolation chip A2 (preparation) 209, and the SPI It is connected with UART interface and MCU2 controller (backup) 205, used for receiving and forwarding of upper layer network data, and simultaneously used for receiving and forwarding of lower layer CAN communication data, realizing network data and CAN data conversion, using UART and SPI interface to exchange data , can obtain the running state of the MCU2 controller (standby), and realize the hot standby redundancy of the communication link.

The RMII/MII interface of the MCU2 controller (preparation) 205 is connected with the PHY/exchange chip (preparation) 203, the CAN1 interface is connected with the isolation chip B1 (main) 212, the CAN2 interface is connected with the isolation chip B2 (preparation) 215, and the SPI It is connected with UART interface and MCU1 controller (main) 204, used for receiving and forwarding of upper layer network data, and simultaneously used for receiving and forwarding of lower layer CAN communication data, realizes network data and CAN data conversion, and uses UART and SPI interface to exchange data , can interact with the running status of the MCU1 controller (master), and realize the hot backup redundancy of the communication link. The embedded chip with CAN, UART, SPI and RMII/MII interfaces can be selected during design.

One port of the isolation chip A1 (main) 206 is connected with the MCU1 controller (main) 204, and the other port is connected with the CAN transceiver A1 (main) 207, which can realize the MCU1 controller (main) 204 and the CAN transceiver A1 ( Main) Digital isolation between 207, digital isolation chip can be selected during design. One port of the isolation chip A2 (preparation) 209 is connected with the MCU1 controller (main) 204, and the other port is connected with the CAN transceiver A1 (main) 209, which can realize the MCU1 controller (main) 204 and the CAN transceiver A2 ( For digital isolation between 209, digital isolation chips can be selected during design.

The CAN transceiver A1 (main) 207 can be a CAN communication chip, the digital port of the CAN1 transceiver A1 (main) 207 is connected with the isolation chip A1 (main) 206, and the analog port is connected with the protection circuit A1 (main) 208 for The analog-to-digital conversion of CAN signal realizes CAN communication data transmission. The digital port of the CAN2 transceiver A2 (preparation) 210 is connected with the isolation chip A2 (preparation) 209, and the analog port is connected with the protection circuit A2 (preparation) 211, which is used for analog conversion of CAN signals and realizes CAN communication data transmission.

The protection circuit A1 (main) 208 is connected with the CAN transceiver A1 (main) 207 to protect the CAN communication interface and ensure the stable and reliable transmission of CAN data. TVS tubes, sub-sensitive resistors, and gas detonator can be selected during design and other devices. The protection circuit A2 (preparation) 211 is connected to the CAN transceiver A2 (preparation) 210 to protect the CAN communication interface and ensure the stable and reliable transmission of CAN data. TVS tubes, sub-sensitive resistors, gas detonator tubes, etc. are selected during design device. One port of the isolation chip B1 (main) 212 is connected with the MCU2 controller (preparation) 205, and the other port is connected with the CAN transceiver B1 (main) 213, which can realize the MCU2 controller (preparation) 205 and the CAN transceiver A1 ( Main) Digital isolation between 213, the digital isolation chip is selected during design. One port of the isolation chip B2 (preparation) 215 is connected with the MCU2 controller (preparation) 205, and the other port is connected with the CAN transceiver B2 (preparation) 216, which can realize the MCU2 controller (preparation) 205 and the CAN transceiver A2 ( For digital isolation between 216, digital isolation chips can be selected during design. The digital port of the CAN1 transceiver B1 (main) 213 is connected to the isolation chip B1 (main) 212, and the analog port is connected to the protection circuit B1 (main) 214, which is used for analog-to-digital conversion of CAN signals and realizes CAN communication data transmission. The digital port of the CAN2 transceiver B2 (preparation) 216 is connected with the isolation chip B2 (preparation) 209, and the analog port is connected with the protection circuit B2 (preparation) 217, which is used for analog conversion of CAN signals and realizes CAN communication data transmission. The protection circuit B1 (main) 214 is connected with the CAN transceiver B1 (main) 213 to protect the CAN communication interface and realize the stable and reliable transmission of CAN data. TVS tubes, sub-sensitive resistors, gas detonator tubes, etc. are selected during design device. The protection circuit B2 (preparation) 217 is connected with the CAN transceiver B2 (preparation) 216, which is used to protect the CAN communication interface and realize the stable and reliable transmission of CAN data. TVS tubes, sub-sensitive resistors, gas detonator tubes, etc. are selected during design device.

As shown in FIG. 3 , it is a schematic structural diagram of a terminal control device in a hot standby redundant communication system according to an exemplary third embodiment of the present invention. This embodiment takes a single lamp monitoring unit as an example for explanation. The single-lamp monitoring unit (1) 106 has the same hardware structure and software structure as the single-lamp monitoring unit (n). The single lamp monitoring unit includes: MCU controller 300, isolation chip (main) 301, isolation chip (backup) 302, CAN transceiver (main) 303, CAN transceiver (backup) 304, protection circuit (main) 305 and protection circuit (preparation) 306. Each single-lamp monitoring unit is directly connected to the CAN bus main communication link through the CAN1 interface, and directly connected to the CAN bus standby communication link through the CAN2 interface, so as to realize the monitoring and control function of the single-lamp monitoring unit.

Specifically, the MCU controller 300 is directly connected to the isolation chip (master) 301 through the CAN1 interface, and is used to receive and forward CAN data, realize data exchange with the hot standby redundant communication device, and simultaneously realize the monitoring and control of the navigation aid lamps, The embedded chip with CAN communication interface is selected during design. The isolation chip (main) 301 can be a digital isolation chip, one end is connected with the MCU controller 300, and the other end is connected with the CAN transceiver (main) 303, for isolating the signal between the MCU controller 300 and the CAN transceiver (main) 303 isolation. The isolation chip (preparation) 302 can be a digital isolation chip, one end is connected with the MCU controller 300, and the other end is connected with the CAN transceiver (preparation) 304, for isolating the signal between the MCU controller 300 and the CAN transceiver (preparation) 304 isolation. The CAN transceiver (main) 303 may be a CAN communication chip for transmitting and receiving CAN bus data; the CAN transceiver (standby) 304 may be a CAN communication chip for transmitting and receiving CAN bus data.

Specifically, the inner side of the protection circuit (main) 305 is connected to the CAN transceiver (main) 303, and the outer side is connected to the CAN bus main communication link, which is used for CAN communication interface protection and realizes stable and reliable transmission of CAN bus data. TVS tube, subsensitizer, gas detonator and other devices. The inside of the protection circuit (preparation) 306 is connected to the CAN transceiver (preparation) 304, and the outside is connected to the CAN bus communication link, which is used for CAN communication interface protection and realizes the stable and reliable transmission of CAN bus data. When designing, TVS tubes, Subsensitizer, gas detonator and other devices;

Each single lamp monitoring unit is used to exchange the data of the hot standby redundant communication device, which can realize the monitoring and control functions of the corresponding lamps. Each lamp can be a navigation aid lamp, which is used to provide a Visual navigation aid function. In specific operation, each lamp can be directly connected to the corresponding single lamp monitoring unit through the secondary cable.

FIG. 4 is a flow chart of a hot standby redundant communication method according to an exemplary fourth embodiment of the present invention. The method is specifically applied in the hot standby redundant communication system shown in FIG. 1-FIG. 3, FIG. 1-FIG. 3 The explanations of can be applied to this embodiment. As shown in Figure 4, the method includes:

Step 401, when the main interface of the optical fiber main link, the CAN bus main link and the CAN bus main link all work normally, the optical fiber main link transmits an optical signal, and the optical signal is transmitted via the hot standby redundant communication device (105). The conversion of signals and electrical signals, through the main interface of the CAN bus main link and the electrical signal to the CAN bus main link to transmit the electrical signal;

Step 402, the hot standby redundant communication device (105) switches to the optical fiber backup link to transmit optical signals when the main optical fiber link fails; and when the CAN bus main link fails, Switching to the CAN bus backup link to transmit the CAN bus signal; and switching to the corresponding backup interface to transmit the CAN bus signal when any main interface fails.

This embodiment is applied to a hot standby redundant communication system based on optical fiber combined with CAN communication, not only adopts optical fiber communication technology, but also adopts CAN bus communication technology, the hot standby redundant communication system can be applied to a single lamp monitoring unit, through CAN communication chain Connect the single-light monitoring unit to realize the replacement of CAN communication twisted-pair cable connectors with optical fiber tail cable connectors, which can reduce the difficulty of waterproofing, reduce the use of system optical modules and optical fiber tail cable connectors, and reduce system costs. Through hot standby in this embodiment The execution process of the redundant communication device realizes the hot standby redundancy of the communication link of the system. stability and high reliability.

As shown in FIG. 5, the flow chart of the hot standby redundant communication method of the exemplary fifth embodiment of the present invention is mainly used to explain the control method during normal startup, and specifically includes:

S10: The hot standby redundant communication system is started, and enters self-inspection and status reporting;

S11: When starting normally, enter the normal state, the default communication data link: A1–B1-①-B3–C1-……-Cn+1;

S12: If an abnormality is detected in part of the communication link A1–B1 during normal operation, it will enter the abnormal state and automatically communicate the data link to: A2–B2-③-B3–C1-……-Cn+1;

S13: If an abnormality is detected in part of the communication link B2–Cn+1 during normal operation, it will enter into an abnormal state, and automatically communicate the data link to: A1–B1-④-B4–C2-……-Cn+2;

S14: If an abnormality is detected in part of the communication link A1–Cn+1 during normal operation, it will enter the abnormal state, and automatically communicate the data link to: A1–B1-④-B4–C2-……-Cn+2;

S15: After reporting the abnormal state in S13, S14, and S15, the system automatically forwards data through the redundant backup link, waits for the abnormal link to return to normal, then automatically switches back to the default communication link, and re-enters the normal state S11.

This embodiment is based on a hot standby redundant communication system using optical fiber communication technology and CAN communication technology, which can reduce the usage of optical modules and optical fiber tail cable connectors, thereby reducing costs; the optical fiber tail cable connectors are replaced with cable connectors to improve the performance of single lamps. The waterproof ability of the monitoring unit; when the main communication link fails, the system will automatically realize data interaction through the backup communication link. The active and standby communication links of the communication system realize the hot standby redundancy of the communication system.

As shown in FIG. 6, the flow chart of the hot standby redundant communication method according to the exemplary sixth embodiment of the present invention is mainly used to explain the control method during abnormal startup, and specifically includes:

S0: The hot standby redundant communication system starts, enters self-check and status report;

S1: If during the self-inspection process, some abnormalities in the communication links of A1–B1 are detected, it enters the abnormal state, and the communication data link is automatically switched to: A2–B2-③-B3–C1-……-Cn+1;

S2: If during the self-inspection process, an abnormal condition of the communication link of B2–Cn+1 is detected, it enters the abnormal state, and the communication data link is automatically switched to: A1–B1-④-B4–C2-……-Cn+2 ;

S3: If during the self-inspection process, some abnormalities in the communication link of A1-Cn+1 are detected, enter the abnormal state, and automatically switch the communication data link to: A2–B2-②-B4–C2-……-Cn+2 ;

S4: Report the abnormal status of steps S1, S2, and S3, and the system automatically forwards data through redundant backup links;

S5: After the abnormal communication link returns to normal, enter the normal state, the default communication data link: A1–B1-①-B3–C1-……-Cn+1, if some communication links are detected to be abnormal during normal operation , automatically judge the abnormal state according to the abnormal point, and enter the abnormal state in steps S1, S2, S3.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. All should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (10)

1. A hot standby redundant communication system is characterized in that, comprising: a first network switching device (101), a second network switching device (102), a first optical aggregation device (103), a second optical aggregation device ( 104) and a hot standby redundant communication device (105); the hot standby redundant communication device (105) is used for converting optical signals and electrical signals, and the hot standby redundant communication device (105) includes a second optical communication Interface (B1), fourth optical communication interface (B2), first CAN communication interface (B3), second CAN communication interface (B4), third CAN communication interface (B5) and fourth CAN communication interface (B6); The first network switching device (101) is connected to the first optical converging device (103) and the second network switching device (102) respectively; the second network switching device (102) is connected to the second optical converging device ( 104) connected; the first optical converging device (103) is connected to the second optical communication interface (B1) of the hot standby redundant communication device (105) through the first optical communication interface (A1); the second The optical converging device (104) communicates with the fourth optical communication interface (B2) of the hot standby redundant communication device (105) through the third optical communication interface (A2); The hot standby redundant communication device (105) is directly connected to the first CAN bus communication link through the first CAN communication interface (B3) and the second CAN communication interface (B4), and through the third CAN communication interface (B5) and The fourth CAN communication interface (B6) is directly connected to the second CAN bus communication link; the first CAN bus communication link and the second CAN bus communication link are used to connect the terminal control equipment respectively; The communication link between the second optical converging device (104) and the fourth optical communication interface (B2) is used as an optical fiber backup link, and the first optical converging device (103) and the second optical communication interface (B1) The communication link between is as the optical fiber main link; The first CAN bus communication link is used as the CAN bus main link, and the second CAN bus standby communication link is used as the CAN bus backup link; the first CAN bus communication link is used as the CAN bus standby link; The communication interface (B3) is used as the main interface of the CAN bus main link, and the second CAN communication interface (B4) is used as the standby interface of the CAN bus main link; the fourth CAN communication interface (B6) is used as the CAN bus standby chain The main interface of road, described the 3rd CAN communication interface (B5) as the backup interface of CAN bus backup link; The hot standby redundant communication device (105) is used to switch to the optical fiber backup link to transmit optical signals when the main optical fiber link fails; and is used for when the CAN bus main link fails, Switching to the CAN bus backup link to transmit CAN bus signals; and switching to the corresponding backup interface to transmit CAN bus signals when any of the main interfaces fails. 2. The hot standby redundant communication system according to claim 1, characterized in that, the hot standby redundant communication device (105) is specifically used for communicating between the first optical converging device (103) and the second optical When the communication link between the interfaces (B1) fails, switch to the communication link between the second optical aggregation device (104) and the fourth optical communication interface (B2) to transmit optical signals, and transmit optical signals via the first CAN The communication interface (B3) transmits CAN bus signals to the terminal control device. 3. The hot-standby redundant communication system according to claim 2, characterized in that, the hot-standby redundant communication device (105) is specifically also used to communicate between the fourth optical communication interface (B2) and the terminal control device When the communication link between fails, the optical signal is transmitted via the communication link between the first optical convergence device (103) and the second optical communication interface (B1), and the optical signal is transmitted via the fourth CAN communication interface ( B6) Transmitting the CAN bus signal to the terminal control device. 4. The hot standby redundant communication system according to claim 3, characterized in that, the hot standby redundant communication device (105) is also specifically used to communicate between the first optical converging device (103) and the terminal control device When the communication link between fails, the optical signal is transmitted via the communication link between the second optical aggregation device (104) and the fourth optical communication interface (B2), and the optical signal is transmitted via the fourth CAN communication interface ( B6) Transmitting the CAN bus signal to the terminal control device. 5. The hot standby redundant communication system according to any one of claims 1-4, further comprising: a first optical module (200), a first PYH/switch chip (202), a first control device (204), first isolation chip (206), first CAN transceiver (207), first protection circuit (208), second isolation chip (209), second CAN transceiver (210), second protection circuit Circuit (211); second optical module (201), second PYH/switching chip (203), second controller (205), third isolation chip (212), third CAN transceiver (213), third A protection circuit (214), a fourth isolation chip (215), a fourth CAN transceiver (216) and a fourth protection circuit (217); The first optical module (200), the first PYH/switch chip (202), the first controller (204), the first isolation chip (206), the first CAN transceiver (207) and the first protection circuit ( 208) connected sequentially, the first optical module (200) is also connected to the second optical communication interface (B1), and the first protection circuit (208) is also directly connected to the first CAN communication interface (B3) A first CAN bus communication link; The second isolation chip (209), the second CAN transceiver (210) and the second protection circuit (211) are connected in sequence, and the second isolation chip (209) is also connected to the first controller (204), The second protection circuit (211) is also directly connected to the first CAN bus communication link through the second CAN communication interface (B4); the second optical module (201), the second PYH/exchange chip (203) , the second controller (205), the third isolation chip (212), the third CAN transceiver (213) and the third protection circuit (214) are connected sequentially, and the second optical module (201) is also connected to the first Four-light communication interface (B2), the third protection circuit (214) is also directly connected to the first CAN bus communication link through the fourth CAN communication interface (B6); The fourth isolation chip (215), the fourth CAN transceiver (216) and the fourth protection circuit (217) are connected in sequence, and the fourth isolation chip (215) is also connected to the second controller (205), The fourth protection circuit (217) is also directly connected to the second CAN bus communication link through the third CAN communication interface (B5). 6. The hot standby redundant communication system according to claim 5, characterized in that, said terminal control device comprises an MCU controller (300), a main isolation chip (301), a standby isolation chip (302), a main CAN transceiver Device (303), standby CAN transceiver (304), main protection circuit (305) and standby protection circuit (306); Main isolation chip (301), main CAN transceiver (303), and main protection circuit (305) are connected sequentially, and described main isolation chip (301) is also connected with described MCU controller (300), and described main protection circuit (305) Connecting the first CAN bus communication link; Standby isolation chip (302), standby CAN transceiver (304) and standby protection circuit (306) are connected successively, and described standby isolation chip (302) is also connected with described MCU controller (300), and described standby protection circuit ( 306) Connect the second CAN bus communication link. 7. The hot standby redundant communication system according to claim 6, characterized in that the number of said terminal control devices is multiple, and the MCU controller (300) of each said terminal control device is correspondingly connected to an airport lamp . 8. A hot standby redundant communication method, characterized in that it is applied to the system according to any one of claims 1-7, said method comprising: When the optical fiber main link, the CAN bus main link and the main interface of the CAN bus main link are all working normally, the optical fiber main link transmits optical signals, and the optical signal and electrical communication are carried out via the hot standby redundant communication device (105). Signal conversion, through the main interface of the CAN bus main link and the electrical signal to the CAN bus main link to transmit the electrical signal; The hot standby redundant communication device (105) switches to the optical fiber backup link to transmit optical signals when the optical fiber main link fails; and switches to the optical fiber backup link when the CAN bus main link fails. The CAN bus backup link transmits the CAN bus signal; and when any main interface fails, switch to the corresponding backup interface to transmit the CAN bus signal. 9. The hot standby redundant communication method according to claim 8, further comprising: The hot standby redundant communication device (105) switches to the second optical aggregation device when the communication link between the first optical aggregation device (103) and the second optical communication interface (B1) fails (104) The communication link between the fourth optical communication interface (B2) transmits optical signals, and transmits CAN bus signals to the terminal control device via the first CAN communication interface (B3). 10. The hot standby redundant communication method according to claim 9, further comprising: When the communication link between the fourth optical communication interface (B2) and the terminal control device fails, the hot standby redundant communication device (105) communicates with the second The communication link between the optical communication interfaces (B1) transmits optical signals, and transmits CAN bus signals to the terminal control device via the fourth CAN communication interface (B6); as well as, When the communication link between the first optical aggregation device (103) and the terminal control device fails, via the communication link between the second optical aggregation device (104) and the fourth optical communication interface (B2) The optical signal is transmitted through the fourth CAN communication interface (B6), and the CAN bus signal is transmitted to the terminal control device through the fourth CAN communication interface (B6).