BA gateway circuit capable of automatically switching network redundancy

Abstract

The utility model discloses a BA gateway circuit capable of automatically switching network redundancy. The BA gateway circuit comprises a main control module and a network module, the network module comprises an Ethernet circuit, a 4G module circuit and a WIFI 6 circuit. The Ethernet circuit, the 4G module circuit and the WIFI 6 circuit are respectively accessed to the Internet, and the Ethernet circuit is also respectively accessed to the Internet in two different modes, so that high-reliability seamless four-network redundancy is realized; in addition, when one or two circuits go wrong and are disconnected with the Internet, the rest circuits can be connected to the Internet for use, so that the situation of system data loss caused by network problems is avoided, and the network security of the system is improved. Meanwhile, when the system accesses the Internet, the stability and the network speed of each path of network can be judged through the main control module, and the network with the fastest and most stable network speed is automatically switched, so that the operation of the whole system is smoother, the working efficiency of the system is improved, and the performance of the whole system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gateways, and in particular to a BA gateway circuit with automatic switching of network redundancy. Background Art

[0002] The building equipment automation system (BA system) mainly manages and controls various types of equipment in the building efficiently through operating status monitoring and fault monitoring, greatly reducing energy consumption while providing the best comfortable environment and modern management mode.

[0003] The building BA gateway plays a very important role in the entire building equipment automatic control system. The building BA gateway connects the IoT platform and the Internet platform to the north, and connects the terminal equipment and various controllers to the south.

[0004] When traditional building BA gateways access the Internet (operator) in the north, they often only have one or two of Ethernet and 4G networks for redundancy. They have poor adaptability to application scenarios and are prone to data transmission interruption when problems occur on both networks, leading to data loss. This poses a huge security risk and reduces the security of the building equipment automatic control system. At the same time, when the Ethernet and 4G networks are redundant, traditional building BA gateways generally directly use the network that is accessed first. At this time, if the network speed of the first access is slow or unstable, and is not as good as the network accessed later, it will cause bandwidth waste, greatly reduce the work efficiency of the building equipment automatic control system, and affect the customer experience. Utility Model Content

[0005] The utility model provides a BA gateway circuit with automatic network redundancy switching, which solves the problem that when the traditional building BA gateway is connected to the Internet, only one or two of the Ethernet and 4G networks are redundant, and the adaptability to application scenarios is poor. When problems occur in both networks at the same time, data loss will occur, reducing the security of the system; at the same time, when a slow or unstable network is used, bandwidth will be wasted, greatly reducing the work efficiency of the system.

[0006] In order to solve the above-mentioned technical problems, the technical solution adopted by the utility model is to provide a BA gateway circuit with automatic switching of network redundancy, including a main control module and a network module, the main control module is used to detect the stability of the network module, and the network module is used to connect to the Internet; the network module includes an Ethernet circuit, a 4G module circuit and a WIFI6 circuit; the main control module is electrically connected to the Ethernet circuit through the RGMII interface, the main control module is electrically connected to the 4G module circuit through the first USB interface, and the main control module is electrically connected to the WIFI6 circuit through the second USB interface.

[0007] In some embodiments, the WIFI6 circuit includes a WIFI chip, and the USB data positive signal terminal and the USB data negative signal terminal of the WIFI chip are electrically connected to the main control module respectively; the chip enable terminal of the WIFI chip is electrically connected to the collector of the first switching transistor, the emitter of the first switching transistor is grounded, and the base is electrically connected to the main control module; the RF input and output terminals of the WIFI chip are electrically connected to the RF coaxial connector.

[0008] In some embodiments, the 4G module circuit includes a 4G chip, a sleep / wake-up end of the 4G chip is connected to a first DC power supply, and the sleep / wake-up end is also electrically connected to the main control module. A control circuit is arranged between the sleep / wake-up end of the 4G chip and the main control module, and the control circuit includes a second switching transistor, a collector of the second switching transistor is electrically connected to the sleep / wake-up end, an emitter of the second switching transistor is grounded, and a base is electrically connected to the main control module through an IO expansion circuit.

[0009] In some embodiments, the reset end of the 4G chip is electrically connected to the collector of the third switching transistor, the emitter of the third switching transistor is grounded, and the base is electrically connected to the IO expansion circuit; the display end of the 4G chip is electrically connected to the cathode of the light-emitting diode, and the anode of the light-emitting diode is connected to the second DC power supply.

[0010] In some embodiments, the Ethernet circuit includes an Ethernet chip RTL8211FS, and the management clock end and management data input and output end of the Ethernet chip RTL8211FS are electrically connected to the main control module respectively; the eight transceiver interfaces of the Ethernet chip RTL8211FS are electrically connected to the corresponding ports of the gigabit network transformer through eight protocol transmission lines, and the gigabit network transformer is also electrically connected to a network interface, and the network interface is used to access the Internet.

[0011] In some embodiments, the first photoelectric conversion pin and the second photoelectric conversion pin of the Ethernet chip RTL8211FS are electrically connected to the input end of the serial deserializer respectively, and the output end of the serial deserializer is electrically connected to the SFP connector, and the SFP connector is used to connect the optical fiber.

[0012] In some embodiments, the main control module includes a main control chip RK3568, the network end of the main control chip RK3568 is electrically connected to the Ethernet circuit through the RGMII interface; the first USB end of the main control chip RK3568 is electrically connected to the 4G module circuit through the first USB interface; the second USB end of the main control chip RK3568 is electrically connected to the WIFI6 circuit through the second USB interface.

[0013] The beneficial effects of the utility model are as follows: the utility model discloses a BA gateway circuit with automatic network redundancy switching, including a main control module and a network module, the main control module is used to detect the stability of the network module, and the network module is used to connect to the Internet; the network module includes an Ethernet circuit, a 4G module circuit and a WIFI6 circuit; the main control module is electrically connected to the Ethernet circuit through an RGMII interface, the main control module is electrically connected to the 4G module circuit through a first USB interface, and the main control module is electrically connected to the WIFI6 circuit through a second USB interface. The utility model accesses the Internet through an Ethernet circuit, a 4G module circuit and a WIFI6 circuit respectively, and the Ethernet circuit also accesses the Internet in two different ways; through the connection relationship between the above circuits and the Internet, the utility model realizes seamless four-network redundancy with high reliability; when any one or two of the circuits have problems and are disconnected from the Internet, the remaining circuits can also be used to access the Internet, avoiding the situation where system data is lost due to network problems, greatly improving the network security of the building equipment automatic control system, and further enhancing the reliability and safety of the entire building equipment automatic control system. At the same time, when accessing the Internet, the utility model can also judge the stability and speed of each network through the main control module, and automatically switch to the fastest and most stable network, so that the entire system runs more smoothly, avoiding the waste of network bandwidth, improving the work efficiency of the entire system, and at the same time improving the performance of the entire building equipment automatic control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a principle block diagram of a BA gateway circuit with automatic network redundancy switching in the utility model;

[0015] Figure 2 It is a schematic diagram of a main control module in a BA gateway circuit with automatic network redundancy switching of the utility model;

[0016] Figure 3 It is a schematic diagram of a WIFI6 circuit in a BA gateway circuit with automatic network redundancy switching of the utility model;

[0017] Figure 4 This is a schematic diagram of a 4G module circuit in a network module in a BA gateway circuit with network redundancy automatic switching in the utility model. Figure 1 ;

[0018] Figure 5 This is a schematic diagram of a 4G module circuit in a network module in a BA gateway circuit with network redundancy automatic switching in the utility model. Figure 2 ;

[0019] Figure 6This is a schematic diagram of a 4G module circuit in a network module in a BA gateway circuit with network redundancy automatic switching in the utility model. Figure 3 ;

[0020] Figure 7 This is a schematic diagram of an Ethernet circuit in a network module in a BA gateway circuit with automatic network redundancy switching of the utility model. Figure 1 ;

[0021] Figure 8 This is a schematic diagram of an Ethernet circuit in a network module in a BA gateway circuit with automatic network redundancy switching of the utility model. Figure 2 ;

[0022] Fig. 9 This is a schematic diagram of an Ethernet circuit in a network module in a BA gateway circuit with automatic network redundancy switching of the utility model. Figure 3 ;

[0023] Fig.10 This is a schematic diagram of an Ethernet circuit in a network module in a BA gateway circuit with automatic network redundancy switching of the utility model. Figure 4 . DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0025] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0026] In order to facilitate the understanding of the present application, some terms that may be involved in the embodiments of the present application are first explained as follows:

[0027] Building equipment automatic control system (BA system for short): It is an integrated general term for the building's cold and heat source system, air conditioning and ventilation system, fan disk system, lighting system, elevator system, water supply and drainage system and other systems. It is widely used in offices, hotels, hospitals, shopping malls and other buildings.

[0028] BA Gateway: Building Equipment Automation System Gateway. Gateway is also called network connector or protocol converter. It realizes network interconnection above the network layer and is a complex network interconnection device.

[0029] Combine the following Figures 1 to 10 As shown, the present application is described in detail with specific embodiments.

[0030] like Figure 1 As shown, the utility model provides a BA gateway circuit with automatic network redundancy switching, including a main control module 1 and a network module. The main control module 1 is used to detect the stability of the network module, and the network module is used to connect to the Internet.

[0031] The network module includes an Ethernet circuit 2, a 4G module circuit 3 and a WIFI6 circuit 4; the main control module 1 is electrically connected to the Ethernet circuit 2 through the RGMII interface, the main control module 1 is electrically connected to the 4G module circuit 3 through the first USB interface, and the main control module 1 is electrically connected to the WIFI6 circuit 4 through the second USB interface.

[0032] The utility model accesses the Internet through Ethernet circuit 2, 4G module circuit 3 and WIFI6 circuit 4 respectively, and Ethernet circuit 2 also accesses the Internet in two different ways; through the connection relationship between the above circuits and the Internet, the utility model realizes seamless four-network redundancy with high reliability; when any one or two circuits have problems and are disconnected from the Internet, the remaining circuits can also be used to access the Internet, avoiding the situation where system data is lost due to network problems, greatly improving the network security of the building equipment automatic control system, and further enhancing the reliability and safety of the entire building equipment automatic control system. At the same time, when the utility model is connected to the Internet, it can also judge the stability and speed of each network through the main control module 1, and automatically switch to the network with the fastest and most stable speed, so that the entire system runs more smoothly, avoiding the waste of network bandwidth, improving the work efficiency of the entire system, and at the same time improving the performance of the entire building equipment automatic control system.

[0033] Further, combined with Figure 1 , Figure 2 As shown, the main control module 1 includes a main control chip RK3568. The network end PCIe3.0 / PCIe2.1 of the main control chip RK3568 is electrically connected to the Ethernet circuit 2 through the RGMII interface; the first USB end USB2.0HOST2 of the main control chip RK3568 is electrically connected to the 4G module circuit 3 through the first USB interface; the second USB end USB2.0HOST3 of the main control chip RK3568 is electrically connected to the WIFI6 circuit 4 through the second USB interface.

[0034] Further, such as Figure 3 As shown, the WIFI6 circuit 4 includes a WIFI chip. In this embodiment, the model of the WIFI chip is SKI.WB800DU2.7.

[0035] Specifically, the USB data positive signal terminal USB_DP of the WIFI chip is electrically connected to a resistor R233 and then connected to Figure 2 The second USB terminal USB2.0HOST3 of the central control chip RK3568 is electrically connected; the USB data negative signal terminal USB_DM of the WIFI chip is electrically connected to a resistor R234 and then electrically connected to the second USB terminal USB2.0HOST3 of the main control chip RK3568.

[0036] The chip enable terminal CHIP_EN of the WIFI chip is electrically connected to the collector of the first switch transistor Q25, the emitter of the first switch transistor Q25 is grounded, the base is electrically connected to a resistor R1264 and then electrically connected to the main control chip RK3568; a resistor R1262 is also electrically connected to the electrical connection between the chip enable terminal CHIP_EN of the WIFI chip and the first switch transistor Q25, and then connected to the third DC power supply V33_WIFI_BT, and a resistor R1263 is also electrically connected to the electrical connection between the chip enable terminal CHIP_EN of the WIFI chip and the resistor R1262, and then grounded; a capacitor C993 is also electrically connected to the electrical connection between the first switch transistor Q25 and the resistor R1264, and then grounded.

[0037] The RF input and output terminal WLAN_BT_ANT of the WIFI chip is electrically connected to a resistor R1261 and then electrically connected to the first end of the RF coaxial connector J9, and the second end of the RF coaxial connector J9 is grounded; a capacitor C1006 is also electrically connected to the electrical connection between the RF input and output terminal WLAN_BT_ANT of the WIFI chip and the resistor R1261 and then grounded; a capacitor C1005 is also electrically connected to the electrical connection between the resistor R1261 and the RF coaxial connector J9 and then grounded.

[0038] The power terminal VBAT of the WIFI chip is connected to the third DC power supply V33_WIFI_BT; three capacitors C161, C1007, and C1008 are electrically connected to the electrical connection between the power terminal VBAT of the WIFI chip and the third DC power supply V33_WIFI_BT and then grounded.

[0039] Further, such as Figures 4 to 6 As shown, the 4G module circuit 3 includes a 4G chip. In this embodiment, the model of the 4G chip is C-91304-52-052R2.

[0040] Specifically, the sleep wake-up terminal WAKEUP_IN of the 4G chip is electrically connected to the resistor R63 and the resistor R60 and then connected to the first DC power supply V33_9555; a resistor R66 is also electrically connected to the electrical connection between the resistor R63 and the resistor R60 and then grounded; Figure 5 The collector of the second switch transistor Q13 is also electrically connected to the electrical connection between the resistor R63 and the resistor R60. The emitter of the second switch transistor Q13 is grounded, and the base is electrically connected to the resistor R91 and connected to the IO expansion circuit. Figure 2 The first USB terminal of the main control chip RK3568 is electrically connected to USB2.0 HOST2, and a resistor R89 ​​is electrically connected to the electrical connection between the resistor R91 and the IO expansion circuit and then connected to the first DC power supply V33_9555. A resistor R97 is also electrically connected to the electrical connection between the resistor R91 and the IO expansion circuit and then grounded. The end of the resistor R91 connected to the resistor R89 ​​is also electrically connected to a capacitor C98 and then grounded.

[0041] Combination Figure 6 The reset terminal RESIN_N of the 4G chip is electrically connected to a resistor R70 and then electrically connected to the collector of the third switch transistor Q14. The emitter of the third switch transistor Q14 is grounded, and the base is electrically connected to the resistor R96 and then electrically connected to the IO expansion circuit. A resistor R90 is electrically connected at the electrical connection between the resistor R96 and the IO expansion circuit and then connected to the first DC power supply V33_9555. A resistor R99 is also electrically connected at the electrical connection between the resistor R96 and the IO expansion circuit and then grounded. The end of the resistor R96 connected to the resistor R90 is also electrically connected to a capacitor C99 and then grounded.

[0042] Continue to refer Figure 4 The display terminal LED_WWA of the 4G chip is electrically connected to a resistor R81, and then electrically connected to the cathode of the light-emitting diode LED1. The anode of the light-emitting diode LED1 is connected to the second DC power supply V38. A capacitor C85 is also electrically connected to the electrical connection between the resistor R81 and the light-emitting diode LED1 and then grounded.

[0043] Further, such as Figures 7 to 10 As shown, the Ethernet circuit 2 includes an Ethernet chip. In this embodiment, the model of the Ethernet chip is RTL8211FS.

[0044] Specifically, Figure 7 As shown in Figure 1, the RXC / PHYAD1 pin, RXCTL / PHYAD2 pin, RXD0 / RXDLY pin, RXD1 / CFG_MODE0 pin, RXD3 / CFG_MODE2 pin and RXD2 / CFG_MODE1 pin of the Ethernet chip are connected to the external PHY configuration circuit. The management clock terminal MDC and the management data input and output terminal MDIO of the Ethernet chip are respectively connected to Figure 2The network end PCIe3.0 / PCIe2.1 of the central control chip RK3568 is electrically connected. The reset end PHYRSTB of the Ethernet chip is electrically connected to the PHY reset circuit.

[0045] The eight transceiver interfaces of the Ethernet chip, MDI[O]+, MDI[O]-, MDI[1]+, MDI[1]-, MDI[2]+, MDI[2]-, MDI[3]+ and MDI[3]-, are connected to the Ethernet chip through eight protocol transmission lines. Fig. 9 The corresponding port of the gigabit network transformer G2401CE is electrically connected, and the gigabit network transformer G2401CE is also electrically connected to the network interface J10, and the network interface J10 is used to access the Internet.

[0046] Combination Figure 7 , Figure 8 The first photoelectric conversion pin HSON and the second photoelectric conversion pin HSOP of the Ethernet chip are electrically connected to the input end of the serial deserializer respectively, and the two output ends of the serial deserializer are electrically connected to the TD+ pin and TD- pin of the SFP connector U46 respectively. The RD+ pin and RD- pin of the SFP connector U46 are electrically connected to the HSIN pin and HSIP pin of the Ethernet chip respectively through the CAP circuit. The SFP connector U46 is used to connect to the optical fiber and access the Internet.

[0047] Combination Figure 7 , Fig.10 The oscillation output terminal XTAL_OUT / EXT_CLK of the Ethernet chip is electrically connected to a resistor R534 and then electrically connected to the third pin of the crystal oscillator Y5. The oscillation input terminal XTAL_IN of the Ethernet chip is electrically connected to the first pin of the crystal oscillator Y5, and the second and fourth pins of the crystal oscillator Y5 are grounded. The electrical connection point between the resistor R534 and the third pin of the crystal oscillator Y5 is also electrically connected to a capacitor C356 and then grounded. The electrical connection point between the oscillation input terminal XTAL_IN of the Ethernet chip and the first pin of the crystal oscillator Y5 is also electrically connected to a capacitor C357 and then grounded.

[0048] In summary, the BA gateway circuit of the utility model is applied to the building equipment automatic control system, and accesses the Internet through the Ethernet circuit 2, 4G module circuit 3 and WIFI6 circuit 4 in the network module respectively. At the same time, the Ethernet circuit 2 also accesses the Internet in two different ways (optical port and electrical port). Through the connection relationship between the above circuits and the Internet, the utility model realizes high-reliability seamless four-network redundancy; when any one or two of the circuits have problems and are disconnected from the Internet, the remaining circuits can also be used to access the Internet, avoiding the loss of system data due to network problems, greatly improving the network security of the building equipment automatic control system, and further enhancing the reliability and safety of the entire building equipment automatic control system. At the same time, the Ethernet circuit 2, 4G module circuit 3 and WIFI6 circuit 4 of the utility model are also electrically connected to the main control module 1 respectively. When accessing the Internet, the stability of each network and the speed of the network can be judged through the main control module 1, and automatically switch to the fastest and most stable network, so that the whole system runs more smoothly, avoids the waste of network bandwidth, improves the work efficiency of the whole system, and at the same time improves the performance of the whole building equipment automatic control system.

[0049] It can be seen that the utility model discloses a BA gateway circuit with automatic network redundancy switching, including a main control module and a network module, the main control module is used to detect the stability of the network module, and the network module is used to connect to the Internet; the network module includes an Ethernet circuit, a 4G module circuit and a WIFI6 circuit; the main control module is electrically connected to the Ethernet circuit through an RGMII interface, the main control module is electrically connected to the 4G module circuit through a first USB interface, and the main control module is electrically connected to the WIFI6 circuit through a second USB interface. The utility model accesses the Internet through an Ethernet circuit, a 4G module circuit and a WIFI6 circuit respectively, and the Ethernet circuit also accesses the Internet in two different ways; through the connection relationship between the above circuits and the Internet, the utility model realizes seamless four-network redundancy with high reliability; when any one or two of the circuits have problems and are disconnected from the Internet, the remaining circuits can also be used to access the Internet, avoiding the situation where system data is lost due to network problems, greatly improving the network security of the building equipment automatic control system, and further enhancing the reliability and safety of the entire building equipment automatic control system. At the same time, when accessing the Internet, the utility model can also judge the stability and speed of each network through the main control module, and automatically switch to the fastest and most stable network, so that the entire system runs more smoothly, avoiding the waste of network bandwidth, improving the work efficiency of the entire system, and at the same time improving the performance of the entire building equipment automatic control system.

[0050] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A BA gateway circuit with automatic network redundancy switching, characterized in that: It includes a main control module and a network module, wherein the main control module is used to detect the stability of the network module, and the network module is used to connect to the Internet; The network module includes an Ethernet circuit, a 4G module circuit and a WIFI 6 circuit; the main control module is electrically connected to the Ethernet circuit through an RGMII interface, the main control module is electrically connected to the 4G module circuit through a first USB interface, and the main control module is electrically connected to the WIFI 6 circuit through a second USB interface.

2. The BA gateway circuit according to claim 1, characterized in that: The WIFI 6 circuit includes a WIFI chip, and the USB data positive signal end and the USB data negative signal end of the WIFI chip are electrically connected to the main control module respectively; the chip enable end of the WIFI chip is electrically connected to the collector of the first switching transistor, the emitter of the first switching transistor is grounded, and the base is electrically connected to the main control module; the RF input and output ends of the WIFI chip are electrically connected to the RF coaxial connector.

3. The BA gateway circuit according to claim 1, characterized in that: The 4G module circuit includes a 4G chip, a sleep and wake-up end of the 4G chip is connected to a first DC power supply, and the sleep and wake-up end is also electrically connected to the main control module. A control circuit is arranged between the sleep and wake-up end of the 4G chip and the main control module, and the control circuit includes a second switching transistor, a collector of the second switching transistor is electrically connected to the sleep and wake-up end, an emitter of the second switching transistor is grounded, and a base is electrically connected to the main control module through an IO expansion circuit.

4. The BA gateway circuit according to claim 3, characterized in that: The reset end of the 4G chip is electrically connected to the collector of the third switching transistor, the emitter of the third switching transistor is grounded, and the base is electrically connected to the IO expansion circuit; the display end of the 4G chip is electrically connected to the cathode of the light-emitting diode, and the anode of the light-emitting diode is connected to the second DC power supply.

5. The BA gateway circuit according to claim 1, characterized in that: The Ethernet circuit includes an Ethernet chip RTL8211 FS, a management clock terminal and a management data input and output terminal of the Ethernet chip RTL8211 FS are electrically connected to the main control module respectively; eight transceiver interfaces of the Ethernet chip RTL8211 FS are electrically connected to corresponding ports of the gigabit network transformer through eight protocol transmission lines, and the gigabit network transformer is also electrically connected to a network interface, and the network interface is used to access the Internet.

6. The BA gateway circuit according to claim 5, characterized in that: The first photoelectric conversion pin and the second photoelectric conversion pin of the Ethernet chip RTL8211 FS are electrically connected to the input end of the serial deserializer respectively, and the output end of the serial deserializer is electrically connected to the SFP connector, and the SFP connector is used to connect the optical fiber.

7. The BA gateway circuit according to any one of claims 1 to 6, characterized in that: The main control module includes a main control chip RK3568, the network end of the main control chip RK3568 is electrically connected to the Ethernet circuit through the RGMII interface; the first USB end of the main control chip RK3568 is electrically connected to the 4G module circuit through the first USB interface; the second USB end of the main control chip RK3568 is electrically connected to the WIFI 6 circuit through the second USB interface.

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