Communication apparatus and communication method
By introducing a controller into the communication device to detect the voltage difference and control the switching device to turn on or off, combined with protection circuits and over-temperature detection, the problem of short circuit to ground caused by RTN being reverse-connected to -48V is solved, achieving protection against short circuit to ground and overcurrent protection, and avoiding carbonization or burnout of components.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- HUAWEI TECH CO LTD
- Filing Date
- 2025-11-07
- Publication Date
- 2026-05-21
AI Technical Summary
Existing communication devices are prone to short circuits to ground when the RTN and -48V of the power distribution system are reversed, which can lead to carbonization or burnout of components such as boards, cables, and devices.
By introducing a controller into the communication device to detect the voltage difference of the switching device, and controlling the switching device to turn on or off according to the voltage difference, combined with protection circuits, over-temperature detection devices, and decoupling circuits, protection against ground short circuits and overcurrent protection can be achieved.
This effectively avoids carbonization or burnout of components such as circuit boards, cables, and devices caused by short circuits to ground, thus improving the safety and reliability of communication devices.
Smart Images
Figure CN2025133533_21052026_PF_FP_ABST
Abstract
Description
A communication device and a communication method
[0001] This application claims priority to Chinese Patent Application No. 202411638896.6, filed on November 15, 2024, entitled "A Communication Device and Communication Method", the entire contents of which are incorporated herein by reference. Technical Field
[0002] This application relates to the field of communications, and more specifically, to a communication device and a communication method. Background Technology
[0003] Currently, common DC-C equipment in the industry typically uses the power return conductor (RTN) for direct grounding or grounding through fuses or inductors, and the equipment lacks reverse connection protection. When the RTN of the power distribution system is reverse-connected to the -48V of the DC-C equipment, it will cause a short circuit to ground. If there is no fuse (or air protection switch) configured in the upstream stage, or if the configured fuse is too large, a large current to ground may occur. In severe cases, it may cause overcurrent to melt, carbonize, or even cause fires in the cables, connectors, circuit boards, devices, and other components in the power distribution system. Summary of the Invention
[0004] This application provides a communication device that can solve the problem of short circuit to ground caused by reverse connection of RTN in the power distribution system and -48V of the communication device, thereby avoiding carbonization or burnout of components such as single boards, cables, and devices caused by short circuit to ground.
[0005] In a first aspect, a communication device is provided, comprising a positive input terminal, a negative input terminal, a pre-stage circuit device, and a post-stage circuit device. One end of the post-stage circuit device is connected to the output terminal of the pre-stage circuit device, and the other end of the post-stage circuit device is connected to the negative input terminal. The pre-stage circuit device includes a controller and a switching device. The positive input terminal is connected to a first end of the switching device, a second end of the switching device is connected to the controller, and a third end of the switching device is connected to a ground wire. The controller is configured to: detect the voltage difference between the first and third ends of the switching device; and control the switching device to turn on or off based on the voltage difference.
[0006] It should be noted that in this embodiment, the positive input terminal can be referred to as RTN, or the cable between the positive input terminal and the first terminal of the switching device can be referred to as RTN. For simplicity, this will not be elaborated further below.
[0007] In the technical solution of this application, the controller detects the voltage difference between the first and third terminals of the switching device and controls the switching device to turn on and off based on the voltage difference. When the controller detects that the RTN of the power distribution system and the -48V of the communication device are reverse connected, it controls the switching device to disconnect, thereby solving the problem of short circuit to ground caused by the RTN of the power distribution system and the -48V of the communication device being reverse connected. This avoids the carbonization or burnout of components such as boards, cables, and devices caused by short circuit to ground.
[0008] It should be noted that the circuit containing the switching device and the controller can be collectively referred to as the anti-reverse circuit.
[0009] In conjunction with the first aspect, in some implementations of the first aspect, controlling the switching device to turn on or off based on the voltage difference includes: controlling the switching device to turn off when the voltage difference is greater than or equal to a first threshold; or controlling the switching device to turn on when the voltage difference is less than the first threshold. Based on the above technical problem, the problem of short circuit to ground caused by reverse connection of the RTN in the power distribution system and the -48V of the communication device can be solved, thereby avoiding the carbonization or burnout of components such as boards, cables, and devices caused by short circuit to ground.
[0010] In conjunction with the first aspect, some implementations of the first aspect further include a first protection circuit. The two ends of the first protection circuit are connected in parallel with the first and third ends of the switching device, respectively. When the voltage difference between the first and third ends of the switching device is greater than or equal to a second threshold, the first protection circuit is turned on; or, when the voltage difference between the first and third ends of the switch is less than the second threshold, the first protection circuit is turned off. Based on the above technical solution, by connecting the first protection circuit in parallel across the two ends of the switching device, residual voltage discharge at the front end can be achieved, further protecting the reverse protection circuit.
[0011] In conjunction with the first aspect, some implementations of the first aspect further include an over-temperature detection device, which is used to: detect the temperature of the switching device; and indicate a circuit malfunction when the temperature of the switching device exceeds a third threshold. Based on the above technical solution, by adding an over-temperature detection device near the anti-reverse circuit, over-temperature detection in anti-reverse circuit fault scenarios can be achieved. When the over-temperature detection device detects an abnormal over-temperature, it indicates a circuit malfunction, so that the central processing unit (CPU) or main controller can reduce the current in the circuit by actively reducing the load, thereby preventing the circuit board from overheating, carbonizing, or burning out.
[0012] In conjunction with the first aspect, some implementations of the first aspect also include a decoupling circuit. This decoupling circuit reduces the voltage difference between the first and third terminals of the switching device. One end of the decoupling circuit is connected to the positive input terminal, and the other end is connected to the first terminal of the switching device. Based on the above technical solution, overvoltage and overcurrent protection for the reverse protection circuit can be achieved under lightning strike and surge scenarios.
[0013] In conjunction with the first aspect, in some implementations of the first aspect, the decoupling circuit includes at least one of the following: a lightning protection inductor and a lightning protection resistor.
[0014] In conjunction with the first aspect, some implementations of the first aspect further include a second protection circuit. This second protection circuit reduces the voltage difference between the first and third terminals of the switching device. One end of the second protection circuit is connected to the positive input terminal, and the other end is connected to the ground wire. Based on the above technical solution, overvoltage and overcurrent protection for the reverse protection circuit can be achieved under lightning strike and surge scenarios.
[0015] In conjunction with the first aspect, in some implementations of the first aspect, the first protection circuit or the second protection circuit includes at least one of the following: a gas discharge tube, a varistor, a transient suppression diode, and a capacitor.
[0016] In conjunction with the first aspect, some implementations of the first aspect also include an anti-carbonization fuse and an overcurrent detection fuse. One end of the anti-carbonization fuse is connected to the third terminal of the switching device and one end of the overcurrent detection fuse, respectively. The other end of the anti-carbonization fuse is connected to the ground wire. When the current flowing through the anti-carbonization fuse exceeds a fourth threshold, the anti-carbonization fuse automatically melts, and the current flowing through the anti-carbonization fuse flows from one end of the overcurrent detection fuse to the other end. Based on the above technical solution, the problem of burnout of components such as boards, cables, and devices caused by abnormal backflow due to unconnected RTN cables in tower-mounted equipment can be solved.
[0017] In conjunction with the first aspect, some implementations of the first aspect also include a fuse failure detection device, one end of which is connected to the other end of the overcurrent detection fuse. Based on the above technical solution, the problem of reporting an indication after a carbonized fuse burns out due to abnormal backflow caused by a disconnected RTN cable in a shared tower device can be solved.
[0018] In conjunction with the first aspect, in some implementations of the first aspect, the switching device includes at least one of the following: a MOSFET, a diode, and a switching element.
[0019] Secondly, a communication method is provided, the communication method being executed by a communication device, the communication device including a positive input terminal, a negative input terminal, a pre-stage circuit device, and a post-stage circuit device, one end of the post-stage circuit device being connected to the output terminal of the pre-stage circuit device, and the other end of the post-stage circuit device being connected to the negative input terminal, wherein the pre-stage circuit device includes: a controller, a switching device, the positive input terminal being connected to a first terminal of the switching device, a second terminal of the switching device being connected to the controller, and a third terminal of the switching device being connected to a ground wire, the method including: the controller detecting the voltage difference between the first terminal and the third terminal of the switching device; the controller controlling the switching device to turn on or off according to the voltage difference.
[0020] In conjunction with the second aspect, in some implementations of the second aspect, the controller controls the switching device to be turned on or off based on the voltage difference, including: when the voltage difference is greater than or equal to a first threshold, the controller controls the switching device to be turned off; or, when the voltage difference is less than the first threshold, the controller controls the switching device to be turned on.
[0021] In conjunction with the second aspect, in some implementations of the second aspect, the communication device further includes a first protection circuit, the two ends of which are respectively connected in parallel to the first and third ends of the switching device. The method further includes: turning on the first protection circuit when the voltage difference between the first and third ends of the switching device is greater than or equal to a second threshold; or turning off the first protection circuit when the voltage difference between the first and third ends of the switch is less than the second threshold.
[0022] In conjunction with the second aspect, in some implementations of the second aspect, the communication device further includes an over-temperature detection device, and the method further includes: the over-temperature detection device detecting the temperature of the switching device; and the over-temperature detection device indicating a circuit malfunction when the temperature of the switching device exceeds a third threshold.
[0023] In conjunction with the second aspect, in some implementations of the second aspect, the communication device further includes a decoupling circuit for reducing the voltage difference between the first and third terminals of the switching device, wherein one end of the decoupling circuit is connected to the positive input terminal, and the other end of the decoupling circuit is connected to the first terminal of the switching device.
[0024] In conjunction with the second aspect, in some implementations of the second aspect, the communication device further includes a second protection circuit for reducing the voltage difference between the first and third terminals of the switching device, wherein one end of the second protection circuit is connected to the positive input terminal and the other end of the second protection circuit is connected to the ground wire.
[0025] In conjunction with the second aspect, in some implementations of the second aspect, the first protection circuit or the second protection circuit includes at least one of the following: a gas discharge tube, a varistor, a transient suppression diode, and a capacitor.
[0026] In conjunction with the second aspect, in some implementations of the second aspect, the communication device further includes an anti-carbonation fuse and an overcurrent detection fuse. One end of the anti-carbonation fuse is connected to the third terminal of the switching device and one end of the overcurrent detection fuse, respectively. The other end of the anti-carbonation fuse is connected to the ground wire. The method further includes: when the current value flowing through the anti-carbonation fuse is greater than a fourth threshold, the anti-carbonation fuse automatically melts, and the current flowing through the anti-carbonation fuse flows from one end of the overcurrent detection fuse to the other end of the overcurrent detection fuse.
[0027] In conjunction with the second aspect, in some implementations of the second aspect, the communication device further includes a fuse failure detection device, one end of which is connected to the other end of the overcurrent detection fuse.
[0028] Thirdly, a power supply system is provided, which includes a power supply device and the communication device described above.
[0029] For a detailed description and technical effect of the second and third aspects, please refer to the detailed description and technical effect of the first aspect above. Attached Figure Description
[0030] Figure 1 is a diagram of the application scenarios applicable to the embodiments of this application.
[0031] Figure 2 is a schematic structural diagram of a communication device 300 provided in an embodiment of this application.
[0032] Figure 3 is a schematic structural diagram of a communication device 300 provided in an embodiment of this application.
[0033] Figure 4 is a schematic structural diagram of a communication device 300 provided in an embodiment of this application.
[0034] Figure 5 is a schematic structural diagram of a communication device 300 provided in an embodiment of this application.
[0035] Figure 6 is a schematic structural diagram of a communication device 300 provided in an embodiment of this application.
[0036] Figure 7 is a schematic flowchart of a communication method 700 provided in an embodiment of this application. Detailed Implementation
[0037] The technical solutions in this application will now be described with reference to the accompanying drawings.
[0038] Before introducing the embodiments of this application, for ease of understanding, the technical terms involved in this application will be briefly explained first.
[0039] DC-return conductor (RTN): Equipment in communication equipment rooms generally uses DC power. The 48V power output line of the alternating current (AC) / DC power equipment is connected to the equipment. To protect the grounding grid buried in the soil under the building from corrosion, the grounding of the 48V power system in the equipment room is grounded at the positive terminal of the power supply, thus forming a -48V power supply system in the equipment room. The positive terminal of the -48V power supply system is defined as the return conductor of the power supply, usually called RTN.
[0040] It should be noted in advance that, in the embodiments of this application, the positive output terminal (or positive pole) of the power distribution system can be referred to as RTN, and the positive input terminal of the communication device (e.g., DC-C device) can be referred to as RTN.
[0041] Reverse connection protection circuit: The circuit design ensures that the circuit board is not damaged when the positive and negative terminals of the power supply are reversed.
[0042] Figure 1 is a schematic structural diagram of a power supply system 100 provided in an embodiment of this application. As shown in Figure 1, the power supply system includes a power supply device 200 and a communication device 300.
[0043] The power supply device is used to convert the first voltage into a second voltage and output it to the communication device. One input terminal of the power supply device is connected to the positive input terminal of the communication device, and the other input terminal of the power supply device is connected to the negative input terminal of the communication device.
[0044] For example, the power supply device can be a power distribution system, such as a power distribution cabinet, which converts the 220V voltage to -48V and outputs it to the communication device.
[0045] It should be noted that the communication device mentioned above can be understood as a direct current-return common (DC-C) power supply device. It should be understood that the DC-C device can be understood as a DC power supply system in which the RTN is connected to the bonding network (BN) in the computer room at multiple points.
[0046] It should also be noted that in some implementations, the aforementioned DC-C power supply equipment can typically be applied to outdoor towers, such as outdoor units of base station equipment (remote radio units, RRUs, etc.) and outdoor access units (OAUs), full outdoor (FOs), and outdoor units (ODUs) of microwave products. Optionally, in other implementations, the aforementioned DC-C power supply equipment can also be applied to communication equipment with an indoor unit (IDU) DC-C architecture. It should be understood that this application does not impose any limitations on this.
[0047] As described in the background section, since DC-C devices currently lack reverse connection protection, a short circuit to ground may occur when the RTN of the power distribution system is reverse-connected to the -48V of the DC-C device. This can lead to carbonization or burnout of cables, components, and other parts of the circuit. Therefore, this application aims to provide a communication device that can solve the problem of short circuit to ground caused by a reverse connection between the RTN of the power distribution system and the -48V of the DC-C device, thereby avoiding carbonization or burnout of circuit boards, cables, components, and other parts caused by a short circuit to ground.
[0048] It should be noted that in this application, the RTN of the power distribution system is reversed with the -48V of the DC-C device, which means that the RTN of the DC-C device is reversed with the -48V of the power distribution system.
[0049] It should be noted that the "connection" described in this application refers to a direct or indirect connection. For example, the connection between A and B can be a direct connection between A and B, or an indirect connection between A and B through one or more other electrical components. For example, A can be directly connected to C, and C can be directly connected to B, thus enabling a connection between A and B through C.
[0050] The communication device 300 provided in the embodiments of this application will be described in detail below with reference to the specific accompanying drawings.
[0051] Figure 2 is a schematic structural diagram of a communication device 300 provided in an embodiment of this application.
[0052] As shown in Figure 2, the communication device includes a positive input terminal, a negative input terminal, a pre-stage circuit device, and a post-stage circuit device. One end of the post-stage circuit device is connected to the output terminal of the pre-stage circuit device, and the other end of the post-stage circuit device is connected to the negative input terminal.
[0053] The pre-amplifier circuit includes a controller and a switching device. The positive input terminal of the pre-amplifier circuit is connected to the first terminal of the switching device. In this case, the positive input terminal of the pre-amplifier circuit can be referred to as RTN, or the cable between the positive input terminal of the pre-amplifier circuit and the switching device can also be referred to as RTN. For simplicity, this will not be elaborated further below. The second terminal of the switching device is connected to the controller, and the third terminal of the switching device is connected to the ground wire.
[0054] Furthermore, in this embodiment of the application, the controller is used to detect the voltage difference between the first terminal and the third terminal of the switching device, and control the switching device to be turned on or off according to the voltage difference between the first terminal and the third terminal of the switching device.
[0055] Alternatively, in one possible implementation, the controller controls the switching device to open when the voltage difference between the first and third terminals of the switching device is greater than or equal to a first threshold.
[0056] Alternatively, in one possible implementation, the controller controls the switching device to turn on when the voltage difference between the first and third terminals of the switching device is less than a first threshold.
[0057] It should be noted that the first threshold is a pre-set voltage threshold. For example, the first threshold can be a negative voltage value or a positive voltage value. It should be understood that the specific value of the first threshold can be determined according to the production technology requirements, and this application does not impose any restrictions on it.
[0058] It should also be noted that, in the embodiments of this application, the switching device may be a metal-oxide-semiconductor field-effect transistor (MOSFET, or MOS transistor for short), or it may be a diode, or it may be a switching element, such as a single-pole single-throw switch, etc. It should be understood that the embodiments of this application do not limit this.
[0059] It should also be noted that the controller mentioned above can also be a control chip, etc., and this application does not limit it.
[0060] Optionally, the communication device may further include a first protection circuit, the two ends of which are connected in parallel to the first and third terminals of the switching device, respectively. That is, one end of the first protection circuit is connected to the first terminal of the switching device, and the other end of the first protection circuit is connected to the third terminal of the switching device.
[0061] Specifically, in one possible implementation, the first protection circuit is turned on when the voltage difference between the first and third terminals of the switching device is greater than or equal to the second threshold. In this implementation, the first protection circuit can be considered to be working.
[0062] In another possible implementation, the first protection circuit is disconnected when the voltage difference between the first and third terminals of the switching device is less than the second threshold. In this implementation, the first protection circuit can be considered to be non-functional.
[0063] It should be noted that the first protection circuit mentioned above can be a transient suppression diode, a varistor, a gas discharge tube, or a capacitor. It should be understood that this application does not limit it in this regard.
[0064] Taking a capacitor as an example in the first protection circuit, a capacitor can provide a discharge path for instantaneous overvoltage and instantaneous overcurrent. It can play a role in voltage or current discharge during surges and lightning strikes, which are caused by large current impacts. Therefore, a capacitor can be used as a protection circuit.
[0065] Transient suppression diodes can also be called instantaneous suppression diodes, etc., and it should be understood that this application does not limit them.
[0066] Optionally, referring to Figure 2, the communication device may also include an over-temperature detection device, specifically used to detect the temperature of the switching device.
[0067] Alternatively, in one possible implementation, if the over-temperature detection device detects that the temperature of the switching device is less than the third threshold, the over-temperature detection device considers the temperature of the switching device to be normal. At this time, the circuit operates normally, and the over-temperature detection device will not report an abnormality.
[0068] Alternatively, in one possible implementation, if the over-temperature detection device detects that the temperature of the switching device is greater than or equal to a third threshold, the over-temperature detection device indicates that the circuit is abnormal.
[0069] Specifically, the over-temperature detection device can indicate abnormal circuit temperature to the central processing unit (CPU).
[0070] Alternatively, in one possible implementation, after receiving an indication from the over-temperature detection device indicating an abnormal temperature, the CPU controls a portion of the load in the control circuit to de-energize, thereby actively reducing the load and thus reducing the current in the current-carrying circuit.
[0071] It should be understood that the third threshold mentioned above is a pre-set temperature threshold, and the specific value of the third threshold is related to the product's process technology requirements. This application's embodiments do not impose any limitations on this.
[0072] It should also be understood that the over-temperature detection device described above can also be called a temperature detection device, detection device, etc., and this application does not limit it in this way.
[0073] The following describes the communication device provided in the embodiment of this application in detail, taking an NMOS transistor as the switching device and a transient suppression diode as the first protection circuit as an example, with reference to Figure 3.
[0074] As shown in Figure 3, the positive input terminal is connected to the source (S) of the NMOS transistor, the gate (G) of the NMOS transistor is connected to the controller, and the drain (D) of the NMOS transistor is connected to the ground.
[0075] Optionally, in some examples, if the switching device is a PMOS transistor, the positive input terminal is connected to the drain (D) of the PMOS transistor, the gate (G) of the PMOS transistor is connected to the controller, and the source (S) of the PMOS transistor is connected to ground.
[0076] In this embodiment, the controller detects the voltage difference between the drain and source of the MOSFET and controls the MOSFET to turn on or off based on the voltage difference between the drain and source.
[0077] Alternatively, in one possible implementation, the controller disconnects the MOSFET when it detects that the voltage difference between the drain and source of the MOSFET is greater than or equal to a first threshold.
[0078] Alternatively, in one possible implementation, the controller turns on the MOSFET when it detects that the voltage difference between the drain and source of the MOSFET is less than a first threshold.
[0079] It should be noted that the relevant description of the first threshold can be found in the previous text, and will not be repeated here.
[0080] Furthermore, as shown in Figure 3, a transient suppression diode can be connected in parallel between the drain and source of the MOSFET.
[0081] Alternatively, in one possible implementation, when the voltage difference between the source and drain of the MOSFET is greater than or equal to the second threshold, the transient suppression diode is turned on. At this time, the transient suppression diode can realize the discharge of residual voltage in the front-end protection, further protecting the MOSFET.
[0082] Alternatively, in one possible implementation, the transient suppression diode is turned off when the voltage difference between the source and drain of the MOSFET is less than a second threshold.
[0083] It should be noted that the relevant description of the second threshold can be found in the previous text, and will not be repeated here. An example is given with the second threshold set to 90V.
[0084] For example, in one possible implementation, when the voltage difference between the source and drain of the MOSFET is greater than or equal to 90V, the transient suppression diode is turned on. At this time, the transient suppression diode can realize the discharge of residual voltage in the front-end protection, further protecting the MOSFET.
[0085] For example, in another possible implementation, the transient suppression diode is turned off when the voltage difference between the source and drain of the MOSFET is less than 90V. It is understood that in this case, the MOSFET can withstand voltages below 90V, and the transient suppression diode is not required to achieve front-end protection and residual voltage discharge.
[0086] Furthermore, as shown in Figure 3, the communication device also includes an over-temperature detection device. This over-temperature detection device is used to detect the temperature of the MOSFET and report a circuit temperature anomaly if the temperature of the MOSFET is greater than or equal to a third threshold. A description of the over-temperature detection device can be found above and will not be repeated here.
[0087] As mentioned above, since the communication device provided in this application embodiment can be applied to outdoor towers, it may face high-level surge and lightning strike risks. Therefore, this application embodiment also provides a communication device capable of providing lightning and surge protection for the anti-reverse circuit in outdoor scenarios. The anti-reverse circuit can be understood as the circuit composed of the aforementioned switching device, controller, and first protection circuit.
[0088] Figure 4 is a schematic structural diagram of a communication device according to another embodiment of this application. It should be noted in advance that, for ease of understanding, the following description only introduces the additions or differences compared with the embodiment shown in Figure 2 above.
[0089] As shown in Figure 4, the communication device may further include a decoupling circuit for reducing the voltage difference between the first and third terminals of the switching device. One end of the decoupling circuit is connected to the positive input terminal, and the other end is connected to the first terminal of the switching device. In this case, the positive input terminal can be referred to as RTN, or the cable connecting the positive input terminal and one end of the decoupling circuit can also be referred to as RTN.
[0090] It should be noted that, in the embodiments of this application, the decoupling circuit includes at least one of the following: a surge protection inductor and a surge protection resistor. It should be understood that the above are merely illustrative examples and are not intended to limit the scope of the application.
[0091] Optionally, continuing to refer to Figure 4, in one possible implementation, the communication device may further include a second protection circuit for reducing the voltage difference between the first and third terminals of the switching device. One end of the second protection circuit is connected to the positive input terminal, and the other end is connected to ground.
[0092] It should be noted that the second protection circuit can be a transient suppression diode, a varistor, a gas discharge tube, or a capacitor. It should be understood that this application does not limit it in this regard.
[0093] Transient suppression diodes can also be called instantaneous suppression diodes, etc., and it should be understood that this application does not limit them.
[0094] The following describes in detail another embodiment of the communication device provided in this application, taking the decoupling circuit as an RTN surge protector inductor and the second protection circuit as an RTN surge protector gas discharge tube as an example, in conjunction with Figure 5. It should be noted that the relevant descriptions of the other components in Figure 5 can be found in Figure 3 above, and will not be repeated here.
[0095] As shown in Figure 5, one end of the RTN surge protector is connected to the positive input terminal, and the other end of the RTN surge protector is connected to the drain of the MOSFET. The function of the RTN surge protector is to reduce the voltage difference between the source and drain of the MOSFET.
[0096] Optionally, referring to Figure 5, an RTN surge protector gas discharge tube is also connected between the positive input terminal and the ground line. For example, one end of the RTN surge protector gas discharge tube is connected to the positive input terminal, and the other end of the RTN surge protector gas discharge tube is connected to the ground line. The function of the RTN surge protector gas discharge tube is to reduce the voltage difference between the source and drain of the MOSFET.
[0097] As mentioned above, the communication device provided in this application embodiment is a DC-C device. The DC-C device is multi-point grounded and installed on an outdoor tower. When the engineering installation is not standardized, the RTN return ground wire of other devices on the outdoor tower, except for the OAU, is not installed. Other devices will return through the RTN cable of the OAU, which may cause a large current to return through the OAU board and cable in extreme scenarios, thereby causing the anti-reverse circuit and lightning protection circuit mentioned above to carbonize or burn out.
[0098] Based on this, this application aims to provide a communication device that can protect the anti-reverse circuit and the lightning protection circuit from being burned out and carbonized under extreme high current scenarios.
[0099] The communication device provided in this application will now be described in detail with reference to Figure 6. It should be noted in advance that, for ease of understanding, the following description only covers the additions or differences compared to the embodiment shown in Figure 4 above.
[0100] As shown in Figure 6, the communication device may also include a carbonization protection fuse and an overcurrent detection fuse. One end of the carbonization protection fuse is connected to the third terminal of the switching device and one end of the overcurrent detection fuse, respectively, and the other end of the carbonization protection fuse is connected to the ground wire.
[0101] Specifically, when the current flowing through the anti-carbonation fuse exceeds the fourth threshold, the anti-carbonation fuse will automatically blow. At this time, the current flowing through the anti-carbonation fuse will flow from one end of the overcurrent detection fuse to the other end of the overcurrent detection fuse.
[0102] Alternatively, in one possible implementation, the communication device may also include a fuse failure detection device.
[0103] One end of the fuse failure detection device is connected to the other end of the overcurrent detection fuse. When the anti-carbonization fuse blows due to overcurrent, the current will flow through the overcurrent detection fuse. The overcurrent detection fuse has a weaker current carrying capacity, so it will also blow soon after. At this time, the fuse failure detection device will indicate an abnormal current after detecting that the overcurrent detection fuse has blown.
[0104] According to the above technical solution, the problem of short circuit to ground caused by reverse connection of RTN in power distribution system and -48V in communication device can be solved, thereby avoiding carbonization or burnout of components such as single board, cable, and device caused by short circuit to ground.
[0105] The communication method provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings.
[0106] Figure 7 is a schematic flowchart of a communication method provided in an embodiment of this application. As shown in Figure 7, the method may include at least the following steps.
[0107] S710, the controller detects the voltage difference between the first and third terminals of the switching device.
[0108] S720, the controller controls the switching device to turn on and off based on the voltage difference between the first and third terminals of the switching device.
[0109] Alternatively, in one possible implementation, the controller controls the switching device to open when the voltage difference between the first and third terminals of the switching device is greater than or equal to a first threshold.
[0110] Alternatively, in one possible implementation, the controller controls the switching device to turn on when the voltage difference between the first and third terminals of the switching device is less than a first threshold.
[0111] It should be noted that the first threshold is a pre-set voltage threshold. For example, the first threshold can be a negative voltage value or a positive voltage value. It should be understood that the specific value of the first threshold can be determined according to the production technology requirements, and this application does not impose any restrictions on it.
[0112] It should also be noted that, in the embodiments of this application, the switching device may be a metal-oxide-semiconductor field-effect transistor (MOSFET, or MOS transistor for short), or it may be a diode, or it may be a switching element, such as a single-pole single-throw switch, etc. It should be understood that the embodiments of this application do not limit this.
[0113] It should also be noted that the controller mentioned above can also be a control chip, etc., and this application does not limit it.
[0114] Optionally, the method may further include:
[0115] S730, the over-temperature detection device detects the temperature of the switching device.
[0116] S740: If the temperature of the switching device is greater than or equal to a third threshold, the over-temperature detection device indicates a circuit malfunction. For example, the over-temperature detection device can indicate an abnormal circuit temperature to the CPU.
[0117] Alternatively, in one possible implementation, if the over-temperature detection device detects that the temperature of the switching device is less than the third threshold, the over-temperature detection device considers the temperature of the switching device to be normal. At this time, the circuit operates normally, and the over-temperature detection device will not report an abnormality.
[0118] It should be understood that the third threshold mentioned above is a pre-set temperature threshold, and the specific value of the third threshold is related to the product's process technology requirements. This application's embodiments do not impose any limitations on this.
[0119] It should also be understood that the over-temperature detection device described above can also be called a temperature detection device, detection device, etc., and this application does not limit it in this way.
[0120] Optionally, the method may further include:
[0121] S750, the fuse failure detection device indicates an abnormal current.
[0122] Specifically, when the anti-carbonization fuse blows due to overcurrent, the current will flow through the overcurrent detection fuse. The overcurrent detection fuse has a weaker current-carrying capacity, so it will also blow soon after. At this time, the fuse failure detection device will indicate an abnormal current after detecting that the overcurrent detection fuse has blown.
[0123] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.
[0124] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.
[0125] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.
[0126] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.
[0127] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.
[0128] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.
[0129] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A communication device, characterized in that, It includes a positive input terminal, a negative input terminal, a pre-stage circuit device, and a power stage circuit device. One end of the power stage circuit device is connected to the output terminal of the pre-stage circuit device, and the other end of the power stage circuit device is connected to the negative input terminal. The front-end circuit device includes: a controller and a switching device. The positive input terminal is connected to the first terminal of the switching device, the second terminal of the switching device is connected to the controller, and the third terminal of the switching device is connected to the ground wire. The controller is used for: Detect the voltage difference between the first and third terminals of the switching device; The switching device is controlled to turn on or off based on the voltage difference.
2. The apparatus according to claim 1, characterized in that, The step of controlling the switching device to turn on or off based on the voltage difference includes: If the voltage difference is greater than or equal to a first threshold, the switching device is controlled to open; or, When the voltage difference is less than the first threshold, the switching device is controlled to turn on.
3. The apparatus according to claim 1 or 2, characterized in that, It also includes a first protection circuit. The two ends of the first protection circuit are connected in parallel to the first and third ends of the switching device, respectively. When the voltage difference between the first and third terminals of the switching device is greater than or equal to the second threshold, the first protection circuit is activated; or... The first protection circuit is turned off when the voltage difference between the first and third terminals of the switch is less than the second threshold.
4. The apparatus according to any one of claims 1 to 3, characterized in that, It also includes an over-temperature detection device. The over-temperature detection device is used for: Detect the temperature of the switching device; If the temperature of the switching device exceeds the third threshold, the indicator circuit is faulty.
5. The apparatus according to any one of claims 1 to 4, characterized in that, It also includes decoupling circuits, The decoupling circuit is used to reduce the voltage difference between the first and third terminals of the switching device. One end of the decoupling circuit is connected to the positive input terminal, and the other end of the decoupling circuit is connected to the first terminal of the switching device.
6. The apparatus according to claim 5, characterized in that, The decoupling circuit includes at least one of the following: Lightning protection inductors and resistors.
7. The apparatus according to any one of claims 1 to 6, characterized in that, Also includes: Second protection circuit, The second protection circuit is used to reduce the voltage difference between the first and third terminals of the switching device. One end of the second protection circuit is connected to the positive input terminal, and the other end of the second protection circuit is connected to the ground wire.
8. The apparatus according to any one of claims 3 to 7, characterized in that, The first protection circuit or the second protection circuit includes at least one of the following: Gas discharge tube, varistor, transient suppression diode, capacitor.
9. The apparatus according to any one of claims 1 to 8, characterized in that, It also includes anti-carbonation fuses and overcurrent detection fuses. One end of the anti-carbonization fuse is connected to the third terminal of the switching device and one end of the overcurrent detection fuse, and the other end of the anti-carbonization fuse is connected to the ground wire. When the current flowing through the anti-carbonation fuse exceeds the fourth threshold, the anti-carbonation fuse automatically blows, and the current flowing through the anti-carbonation fuse flows from one end of the overcurrent detection fuse to the other end of the overcurrent detection fuse.
10. The apparatus according to claim 9, characterized in that, It also includes a fuse failure detection device, one end of which is connected to the other end of the overcurrent detection fuse.
11. The apparatus according to any one of claims 1 to 10, characterized in that, The switching device includes at least one of the following: Metal-oxide-semiconductor field-effect transistors (MOS transistors), diodes, and switching elements.
12. A communication method, characterized in that, The communication method is executed by a communication device, which includes a positive input terminal, a negative input terminal, a pre-stage circuit device, and a post-stage circuit device. One end of the post-stage circuit device is connected to the output terminal of the pre-stage circuit device, and the other end of the post-stage circuit device is connected to the negative input terminal. The front-end circuit device includes: a controller and a switching device. The positive input terminal is connected to the first terminal of the switching device, the second terminal of the switching device is connected to the controller, and the third terminal of the switching device is connected to the ground wire. The method includes: The controller detects the voltage difference between the first and third terminals of the switching device; The controller controls the switching device to turn on or off based on the voltage difference.
13. The method according to claim 12, characterized in that, The controller controls the switching device to turn on or off based on the voltage difference, including: If the voltage difference is greater than or equal to a first threshold, the controller controls the switching device to open; or, When the voltage difference is less than the first threshold, the controller controls the switching device to turn on.
14. The method according to claim 12 or 13, characterized in that, The communication device further includes a first protection circuit, the two ends of which are connected in parallel to the first and third ends of the switching device, respectively. The method further includes: When the voltage difference between the first and third terminals of the switching device is greater than or equal to the second threshold, the first protection circuit is activated; or... The first protection circuit is turned off when the voltage difference between the first and third terminals of the switch is less than the second threshold.
15. The method according to any one of claims 12 to 14, characterized in that, The communication device further includes an over-temperature detection device, and the method further includes: The over-temperature detection device detects the temperature of the switching device; If the temperature of the switching device exceeds the third threshold, the over-temperature detection device indicates that the circuit is malfunctioning.
16. The method according to any one of claims 12 to 15, characterized in that, The communication device further includes a decoupling circuit for reducing the voltage difference between the first and third terminals of the switching device. One end of the decoupling circuit is connected to the positive input terminal, and the other end of the decoupling circuit is connected to the first terminal of the switching device.
17. The method according to any one of claims 12 to 16, characterized in that, The communication device further includes a second protection circuit, which is used to reduce the voltage difference between the first and third terminals of the switching device. One end of the second protection circuit is connected to the positive input terminal, and the other end of the second protection circuit is connected to the ground wire.
18. The method according to any one of claims 14 to 17, characterized in that, The first protection circuit or the second protection circuit includes at least one of the following: Gas discharge tube, varistor, transient suppression diode, capacitor.
19. The method according to any one of claims 12 to 18, characterized in that, The communication device also includes an anti-carbonation fuse and an overcurrent detection fuse. One end of the anti-carbonation fuse is connected to the third terminal of the switching device and one end of the overcurrent detection fuse, respectively, and the other end of the anti-carbonation fuse is connected to the ground wire. The method further includes: When the current flowing through the anti-carbonation fuse exceeds the fourth threshold, the anti-carbonation fuse automatically blows, and the current flowing through the anti-carbonation fuse flows from one end of the overcurrent detection fuse to the other end of the overcurrent detection fuse.
20. The method according to claim 19, characterized in that, The communication device also includes a fuse failure detection device, one end of which is connected to the other end of the overcurrent detection fuse.