Optical fiber power supply management circuit, method and fttr device

Abstract

This application provides a fiber optic power supply management circuit, method, and FTTR device, relating to the field of fiber optic power supply technology. In this application, the fiber optic power supply management circuit includes: a power supply module, wherein the positive terminal of the input side of the fiber optic power supply interface module is connected to the positive terminal of the power supply module, and the output side of the fiber optic power supply interface module is connected to a sub-gateway via an optoelectronic composite cable; and a power supply control switch module, wherein the positive terminal of the power supply control switch module is connected to the negative terminal of the input side of the fiber optic power supply interface module, and the negative terminal of the power supply control switch module is connected to the negative terminal of the power supply module. When power needs to be supplied to the sub-gateway, the power supply control switch module controls the positive and negative terminals to conduct, forming a power supply loop; when power is not needed to supply power to the sub-gateway, the power supply control switch module controls the positive and negative terminals to turn off, disconnecting the power supply loop and stopping power supply to the sub-gateway. Based on the above, the relatively low security of fiber optic power supply in the prior art can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical fiber power supply, in particular to an optical fiber power supply management circuit, method and FTTR device. BACKGROUND

[0002] Fiber to The Room (FTTR) technology is an innovative home and small business internal network deployment solution, which uses optical fiber to replace traditional network cables, extends optical fiber to each independent space, and realizes seamless connection with the home master gateway through the deployed optical network terminal device. The corresponding FTTR system mainly includes a master gateway, a slave gateway and a router with similar functions, etc. Components can be connected through optical fiber, or connected flexibly through wired network or wireless connection. Generally, the master gateway is deployed at the user access port position, such as the weak current box, which is connected to the operator optical fiber access port to obtain services; the slave gateway is deployed at the user terminal, such as the bedroom, and is connected to the downlink optical interface of the master gateway through the optical fiber; multiple slave gateways need to be deployed to meet the coverage requirements, so multiple slave gateways need to be connected to the output end of the optical splitter first, and then the input end of the optical splitter is connected to the master gateway. And passive optical splitters can be used to realize optical connection, so all connected slave gateways need to be powered independently.

[0003] In view of some complex application environments and the difficulty of slave gateway power supply, Power Over Fiber (POF) technology has been developed. For the existing POF power supply system, an active optical splitter is generally selected to realize simultaneous power supply and optical fiber signal transmission. The active optical splitter power supply method generally adopts 48V-56V direct current direct power supply or uses a special Power over Ethernet (PSE) chip to realize power supply; a powered device (PD device) is added to the slave gateway device. In this way, for the devices that need PoF power supply, the optical splitter needs to have power supply function, so an active optical splitter, i.e. an active optical splitter, is needed. However, in the active optical splitter, the direct power supply system directly loads the direct current power supply to the Power Over Fiber line, and then directly connects to the slave gateway. Due to the difficulty in effectively controlling the power supply, there is a problem of relatively low safety. SUMMARY

[0004] Therefore, the purpose of the present application is to provide an optical fiber power supply management circuit, method and FTTR device to improve the problem of relatively low safety of optical fiber power supply in the prior art.

[0005] To achieve the above object, the application adopts the following technical scheme:

[0006] An optical fiber power supply management circuit is applied to an FTTR device, the FTTR device comprising a main gateway, an optical splitter, an optical fiber power supply interface module and a sub-gateway, the main gateway providing optical fiber signals for the sub-gateway through the optical splitter and the optical fiber power supply interface module, wherein the optical fiber power supply management circuit comprises:

[0007] a power supply module, wherein the positive pole of the input side of the optical fiber power supply interface module is connected with the positive pole of the power supply module, and the output side of the optical fiber power supply interface module is connected with the sub-gateway through an optical-electrical composite cable to supply power and provide optical fiber signals for the sub-gateway;

[0008] a power supply control switch module, wherein the positive pole of the power supply control switch module is connected with the negative pole of the input side of the optical fiber power supply interface module, and the negative pole of the power supply control switch module is connected with the negative pole of the power supply module;

[0009] wherein when power supply is needed for the sub-gateway, the power supply control switch module controls the positive pole and the negative pole to be turned on, so that the positive pole of the power supply module, the positive pole of the input side of the optical fiber power supply interface module, the positive pole of the output side of the optical fiber power supply interface module, the positive pole of the sub-gateway, the negative pole of the sub-gateway, the negative pole of the output side of the optical fiber power supply interface module, the negative pole of the input side of the optical fiber power supply interface module, the positive pole of the power supply control switch module, the negative pole of the power supply control switch module and the negative pole of the power supply module form a power supply loop;

[0010] when power supply is not needed for the sub-gateway, the power supply control switch module controls the positive pole and the negative pole to be turned off, so that the power supply loop is disconnected and the power supply for the sub-gateway is stopped.

[0011] In the preferred selection of the application, in the above optical fiber power supply management circuit, the optical fiber power supply management circuit further comprises:

[0012] an output overcurrent detection module, wherein the positive pole of the output overcurrent detection module is connected with the negative pole of the power supply control switch module, and the negative pole of the output overcurrent detection module is connected with the negative pole of the power supply module;

[0013] an output overcurrent protection module, wherein the input end of the output overcurrent protection module is connected with the overcurrent detection signal output end of the output overcurrent detection module, and the output end of the output overcurrent protection module is connected with the control end of the power supply control switch module;

[0014] Wherein, when the overcurrent detection signal output at the overcurrent detection signal output end represents that there is an overcurrent situation, the output overcurrent protection module outputs an overcurrent protection signal for controlling the positive and negative electrodes of the power supply control switch module to be turned off in response to the overcurrent detection signal.

[0015] In the preferred selection of the present application, in the above optical fiber power supply management circuit, the optical fiber power supply management circuit further comprises:

[0016] a current detection module, wherein the detection end of the current detection module is connected with the positive electrode of the output overcurrent detection module or the negative electrode of the power supply control switch module;

[0017] a control module, wherein the current detection input end of the control module is connected with the output end of the current detection module, for acquiring the current detected by the current detection module, and outputting a corresponding control signal based on the relationship between the current and a preset determined current control condition;

[0018] a control signal driving module, wherein the input end of the control signal driving module is connected with the output end of the control module, and the output end of the control signal driving module is connected with the control end of the power supply control switch module, for acquiring the control signal output by the control module, and outputting a driving signal to the power supply control switch module based on the control signal, so as to drive the positive and negative electrodes of the power supply control switch module to be in a conducting or turning-off state.

[0019] In the preferred selection of the present application, in the above optical fiber power supply management circuit, the optical fiber power supply management circuit further comprises:

[0020] a sub-gateway handshake detection module, wherein the input end of the sub-gateway handshake detection module is connected with the positive electrode of the power supply control switch module or the negative electrode of the input side of the optical fiber power supply interface module, and the output end of the sub-gateway handshake detection module is connected with the handshake detection input end of the control module, so that the control module is further used for analyzing the state of the sub-gateway connected with the optical fiber power supply interface module based on the signal output by the sub-gateway handshake detection module in response to the detected handshake detection signal, and driving the positive and negative electrodes of the power supply control switch module to be in a conducting or turning-off state through the control signal driving module based on the state.

[0021] In the preferred selection of the present application, in the above optical fiber power supply management circuit, the optical fiber power supply management circuit further comprises:

[0022] The port protection module, wherein the positive pole of the power supply of the port protection module is connected with the positive pole of the power supply module, the output positive pole of the port protection module is connected with the positive pole of the input side of the fiber power interface module, the output negative pole of the port protection module is connected with the negative pole of the input side of the fiber power interface module, the load end negative pole of the port protection module is connected with the positive pole of the power supply control switch module, when the power supply to the sub-gateway is needed, the direction of the current is: the positive pole of the power supply module, the power supply positive pole of the port protection module, the output positive pole of the port protection module, the positive pole of the input side of the fiber power interface module, the positive pole of the output side of the fiber power interface module, the positive pole of the sub-gateway, the negative pole of the sub-gateway, the negative pole of the output side of the fiber power interface module, the negative pole of the input side of the fiber power interface module, the output negative pole of the port protection module, the load end negative pole of the port protection module, the positive pole of the power supply control switch module, the negative pole of the power supply control switch module, the negative pole of the power supply module;

[0023] When the output side of the fiber power interface module is not connected with the sub-gateway, at least part of the electrical elements inside the sub-gateway handshake detection module, at least part of the electrical elements inside the port protection module and the positive pole and the negative pole of the power supply module form a communication loop, the level of the signal output by the sub-gateway handshake detection module is the first value, so that the control module determines that the output side of the fiber power interface module is not connected with the sub-gateway based on the signal.

[0024] In the preferred selection of the present application, in the above-mentioned fiber power supply management circuit, when the output side of the fiber power interface module is connected with the sub-gateway meeting the Ethernet standard, the characteristic resistance in the sub-gateway, at least part of the electrical elements inside the sub-gateway handshake detection module and the positive pole and the negative pole of the power supply module form a communication loop, the level of the signal output by the sub-gateway handshake detection module is the second value, so that the control module determines that the output side of the fiber power interface module is connected with the sub-gateway meeting the Ethernet standard based on the signal.

[0025] In the preferred selection of the present application, in the above-mentioned fiber power supply management circuit, when the output side of the fiber power interface module is connected with the sub-gateway meeting the Ethernet standard, the characteristic resistance in the sub-gateway, at least part of the electrical elements inside the sub-gateway handshake detection module and the positive pole and the negative pole of the power supply module form a communication loop, the level of the signal output by the sub-gateway handshake detection module is the second value, so that the control module determines that the output side of the fiber power interface module is connected with the sub-gateway meeting the Ethernet standard based on the signal.

[0026] In the preferable selection of the present application, in the above-mentioned optical fiber power supply management circuit, the optical fiber power supply management circuit further comprises:

[0027] an input overcurrent protection module, wherein the positive electrode of the input overcurrent protection module is connected with the negative electrode of the power supply module, and the negative electrode of the input overcurrent protection module is connected with the power supply positive electrode of the port protection module;

[0028] a voltage detection module, wherein the input end of the voltage detection module is connected with the negative electrode of the input overcurrent protection module or the power supply positive electrode of the port protection module, and the output end of the voltage detection module is connected with the voltage detection input end of the control module, and the control module is further used for driving the positive electrode and the negative electrode of the power supply control switch module to be in the on or off state through the control signal driving module based on the voltage detection signal input by the voltage detection input end.

[0029] On the basis of the above, the present application further provides an optical fiber power supply management method applied to the control module comprised in the above-mentioned optical fiber power supply management circuit, wherein the optical fiber power supply management circuit further comprises a power supply module, a voltage detection module, an input overcurrent protection module, a port protection module, a sub-gateway handshake detection module and a control signal driving module, and the optical fiber power supply management method comprises:

[0030] after the power supply module provides the power supply voltage, detecting whether the power supply voltage is in the nominal range through the voltage detection module, and when the power supply voltage is in the nominal range and the input overcurrent protection module does not perform overcurrent protection and the port protection module does not perform lightning surge protection, detecting whether the output side of the optical fiber power supply interface module is connected with a sub-gateway through the sub-gateway handshake detection module;

[0031] when the output side of the optical fiber power supply interface module is connected with a sub-gateway, outputting a driving signal to the power supply control switch module through the control signal driving module to drive the positive electrode and the negative electrode of the power supply control switch module to be in the on state, so as to realize the power supply to the sub-gateway.

[0032] On the basis of the above, the present application further provides an FTTR device comprising a main gateway, an optical splitter, an optical fiber power supply interface module, a sub-gateway and the above-mentioned optical fiber power supply management circuit.

[0033] For the optical fiber power supply management circuit, method and FTTR device provided by the application, the optical fiber power supply management circuit comprises: a power supply module, wherein the positive electrode of the input side of the optical fiber power supply interface module is connected with the positive electrode of the power supply module, and the output side of the optical fiber power supply interface module is connected with the sub-gateway through the optical-electrical composite cable; a power supply control switch module, wherein the positive electrode of the power supply control switch module is connected with the negative electrode of the input side of the optical fiber power supply interface module, and the negative electrode of the power supply control switch module is connected with the negative electrode of the power supply module; wherein when power supply to the sub-gateway is needed, the power supply control switch module controls the positive electrode and the negative electrode to be turned on to form a power supply loop; when power supply to the sub-gateway is not needed, the power supply control switch module controls the positive electrode and the negative electrode to be turned off so that the power supply loop is disconnected and the power supply to the sub-gateway is stopped. Based on the above, since the power supply control switch module is configured, the power supply loop can be formed when power supply to the sub-gateway is needed, and the power supply loop is disconnected when power supply to the sub-gateway is not needed, so that the power supply to the sub-gateway is effectively managed, and the problem that the power supply to the sub-gateway cannot be controlled when a safety accident occurs or the power supply cannot be effectively supplied after the safety accident is avoided, thereby the problem of relatively low safety of optical fiber power supply in the prior art can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to make the above-mentioned purposes, features and advantages of the application more obvious and easy to understand, the following preferred embodiments are specifically described below with reference to the accompanying drawings.

[0035] Figure 1 The structural block diagram of the FTTR device provided by the embodiment of the application.

[0036] Figure 2 The system diagram of the optical splitter with multiple downstream optical ports provided by the embodiment of the application.

[0037] Figure 3 The application schematic diagram of the optical fiber power supply management circuit provided by the embodiment of the application.

[0038] Figure 4 The schematic diagram of the power supply module provided by the embodiment of the application.

[0039] Figure 5 The schematic diagram of the input overcurrent protection module provided by the embodiment of the application.

[0040] Figure 6 The schematic diagram of the port protection module provided by the embodiment of the application.

[0041] Figure 7 The schematic diagram of the voltage detection module provided by the embodiment of the application.

[0042] Figure 8 The schematic diagram of the sub-gateway handshake detection module provided by the embodiment of the application.

[0043] Figure 9 A schematic diagram of a power supply control switch module provided for an embodiment of the present application.

[0044] Figure 10 A schematic diagram of a control signal driving module provided for an embodiment of the present application.

[0045] Figure 11 A schematic diagram of an output overcurrent protection module provided for an embodiment of the present application.

[0046] Figure 12 A schematic diagram of an output overcurrent detection module provided for an embodiment of the present application.

[0047] Figure 13 A schematic diagram of a current detection module provided for an embodiment of the present application. DETAILED DESCRIPTION

[0048] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application but not all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0050] As shown in Figure 1 The FTTR device can include a main gateway, an optical splitter, a fiber power supply interface module, a sub-gateway, and a fiber power supply management circuit. The main gateway provides an optical fiber signal for the sub-gateway through the optical splitter and the fiber power supply interface module. Specifically, the downlink optical port of the main gateway can be connected with the uplink optical port of the optical splitter, and the downlink optical port of the optical splitter can be connected with the optical fiber end of the fiber power supply interface module. In this way, the main gateway can transmit the optical fiber signal to the fiber power supply interface module, and the output side of the fiber power supply interface module transmits the optical fiber signal to the sub-gateway through the optical fiber cable, thereby further transmitting the optical fiber signal to the sub-gateway.

[0051] And, the power over fiber management circuit can be connected with the positive and negative poles of the input side (for power input) of the power over fiber interface module, so that the sub-gateway can be powered through the power over fiber interface module and the optical-electrical composite cable.

[0052] It can be understood that in some embodiments, the optical splitter can have a plurality of downstream optical ports, such as 4, 8, 16, etc., so that the connection with a plurality of power over fiber interface modules can be realized through a plurality of downstream optical ports, thereby providing optical fiber signals for a plurality of sub-gateways respectively.

[0053] For example, in combination with the above-mentioned Figure 2 It can be seen that the optical splitter can have one cascaded optical port and four downstream optical ports. The one cascaded optical port can be connected to other optical splitters for optical path expansion. The four downstream optical ports can be connected one by one with four power over fiber interface modules, and the four power over fiber interface modules can be connected one by one with four sub-gateways, so that optical fiber signals can be provided for the four sub-gateways respectively.

[0054] In addition, for a plurality of power over fiber interface modules and a plurality of sub-gateways, a plurality of power over fiber management circuits can be configured correspondingly, such as one power over fiber management circuit powering one connected sub-gateway through one connected power over fiber interface module. For example, for the example of Figure 2 When there are four power over fiber interface modules and four sub-gateways, there can be four power over fiber management circuits.

[0055] In addition, it should be noted that when a plurality of power over fiber management circuits are configured, the plurality of power over fiber management circuits can be independent of each other, or part of the electrical elements can be shared. For example, when there is a control module, the control module can be shared, that is, a plurality of power over fiber management circuits share one control module, so that in reducing the cost of the equipment, the unified power management of the control module to the plurality of power over fiber interface modules and the plurality of sub-gateways is also facilitated. Taking four power over fiber interface modules as an example, the unified power management is described as follows:

[0056] The lower optical port 1 needs to guarantee the key service, and needs to preferentially satisfy the power supply and service function guarantee. Under normal circumstances, each sub-gateway is budgeted according to the 15.4W power consumption required by the 802.3 AF standard, and the total power consumption requirement of the four sub-gateways is 61.6W, plus the 1W power consumption required by the optical fiber power supply management circuit itself, the power consumption requirement of the power input is required to be greater than 62.6W. Based on this, if a 36W power supply is selected for power supply. According to the above requirements, it cannot meet the demand of hanging four full-load sub-gateways, and has the guarantee function of power supply priority. By default, the priority of the lower optical port 1 is 1, the priority of the lower optical port 2 is 2, the priority of the lower optical port 3 is 3, and the priority of the lower optical port 4 is 4. The smaller the number, the higher the priority of the corresponding lower optical port.

[0057] When two sub-gateways are connected to the two optical fiber power supply interface modules corresponding to the lower optical port 3 and the lower optical port 4 respectively, the maximum total power consumption of the load is 30.8W, which does not exceed the input power of the 36W power supply. The two sub-gateways corresponding to the lower optical port 3 and the lower optical port 4 are normally powered on and work, and the corresponding priority marks are 3 and 4. When the two optical fiber power supply interface modules corresponding to the lower optical port 1 are connected to the sub-gateway again, at this time, the total power consumption of the three sub-gateways is 46.2W in theory, and the input power supply power consumption does not meet the demand. If the three sub-gateways are forced to be powered on and work, it will cause insufficient input power supply power, abnormality such as system downtime and repeated restart of the input power supply, and abnormal system work.

[0058] Therefore, the priority management function can avoid such situations.

[0059] Specifically, when the third sub-gateway accesses the optical fiber power supply interface module corresponding to the downlink optical port 1, the total power consumption of the connected sub-gateway is counted, and the power consumption of the sub-gateway of the optical fiber power supply interface module corresponding to the downlink optical port 3 and the downlink optical port 4 is 30.8W. If the sub-gateway corresponding to the downlink optical port 1 is directly powered, it will cause the whole system to be down, and the priority strategy intervenes in the work. First, the priority of the downlink optical port corresponding to the sub-gateway that has been powered on is checked and marked, which are 3 and 4 respectively. Then, it is judged that the downlink optical port to be accessed is the downlink optical port 1, and the priority is 1, which is higher than the priority of the downlink optical port 3 and the downlink optical port 4. Therefore, first, the downlink optical port 4 with a priority of 4 can be forced to power off, and the current overall power consumption is counted in real time. At this time, only the sub-gateway corresponding to the downlink optical port 3 is powered on, and the power consumption is 15.4W, while the input power is 36W. It is judged that a new sub-gateway can be accessed. In this way, the downlink optical port can be polled to perform handshaking / detection, and it is found that the downlink optical port 1 and the downlink optical port 4 are ready to be powered on. It is continued to be inquired that the priority of the downlink optical port 1 and the downlink optical port 4 to be powered on is 1 and 4 respectively, and the priority of the downlink optical port 1 is higher than that of the downlink optical port 4. It is judged that the overall power consumption will exceed the power supply input power 36W after the downlink optical port 1 and the downlink optical port 4 are powered on at the same time. Therefore, the power-on of the downlink optical port 4 with a low priority is abandoned. At the same time, the power consumption of the sub-gateway corresponding to the downlink optical port 1 is calculated after being powered on, which does not exceed the power supply input power 36W. The downlink optical port 1 can be safely powered on. Therefore, the optical fiber power supply interface module corresponding to the downlink optical port 1 can be powered, and the power supply is stable. The real-time monitoring of the power consumption of each down-hung sub-gateway is performed to determine whether it is in a normal working state, and the abnormal situation is intervened and processed in time.

[0060] Based on this, after the power consumption management and power supply priority processing described above, it can be ensured that the down-hung sub-gateway can be in a stable and reliable working state.

[0061] In combination Figure 3 , the embodiment of the present application also provides an optical fiber power supply management circuit applicable to the FTTR device. The optical fiber power supply management circuit can include a power supply module and a power supply control switch module.

[0062] In detail, the positive electrode of the input side of the optical fiber power supply interface module is connected with the positive electrode of the power supply module, and the output side of the optical fiber power supply interface module is connected with the sub-gateway through an optical-electrical composite cable to supply power and provide optical fiber signals to the sub-gateway. The positive electrode of the power supply control switch module is connected with the negative electrode of the input side of the optical fiber power supply interface module, and the negative electrode of the power supply control switch module is connected with the negative electrode of the power supply module.

[0063] Based on the above, when power needs to be supplied to the sub-gateway, the power supply control switch module controls the positive and negative electrodes to be turned on, so that the positive electrode of the power supply module, the positive electrode of the input side of the fiber power supply interface module, the positive electrode of the output side of the fiber power supply interface module, the positive electrode of the sub-gateway, the negative electrode of the sub-gateway, the negative electrode of the output side of the fiber power supply interface module, the negative electrode of the input side of the fiber power supply interface module, the positive electrode of the power supply control switch module, the negative electrode of the power supply control switch module, and the negative electrode of the power supply module form a power supply loop. When power does not need to be supplied to the sub-gateway, the power supply control switch module controls the positive and negative electrodes to be turned off, so that the power supply loop is disconnected and the power supply to the sub-gateway is stopped.

[0064] Based on the above, since the power supply control switch module is configured, the power supply loop can be formed when power needs to be supplied to the sub-gateway, and the power supply loop can be disconnected when power does not need to be supplied to the sub-gateway, thereby effectively managing the power supply of the sub-gateway and avoiding the problem that the power supply to the sub-gateway cannot be controlled in the event of a safety accident or the power supply cannot be effectively supplied after a safety accident. Therefore, the problem of relatively low safety of fiber power supply in the prior art can be improved.

[0065] It can be understood that, in an alternative embodiment, in order to be able to implement overcurrent protection of the sub-gateway during power supply to the sub-gateway, the above-mentioned fiber power supply management circuit can further include an output overcurrent detection module and an output overcurrent protection module.

[0066] In detail, the positive electrode of the output overcurrent detection module is connected to the negative electrode of the power supply control switch module, and the negative electrode of the output overcurrent detection module is connected to the negative electrode of the power supply module. The input end of the output overcurrent protection module is connected to the overcurrent detection signal output end of the output overcurrent detection module, and the output end of the output overcurrent protection module is connected to the control end of the power supply control switch module.

[0067] Based on this, when the overcurrent detection signal output from the overcurrent detection signal output end indicates that there is an overcurrent situation, the output overcurrent protection module outputs an overcurrent protection signal for controlling the positive and negative electrodes of the power supply control switch module to be turned off in response to the overcurrent detection signal. In this way, after the positive and negative electrodes of the power supply switch module are turned off, the power supply loop in which the sub-gateway is located is disconnected, thereby stopping the power supply to the sub-gateway, avoiding the problem that excessive current causes damage to the sub-gateway, and effectively improving the operation safety of the equipment.

[0068] It can be understood that, in an alternative embodiment, in order to be able to implement current protection with higher reliability for the sub-gateway, the fiber power supply management circuit can further include a current detection module, a control module, and a control signal driving module.

[0069] In detail, the detection end of the current detection module is connected with the positive pole of the output overcurrent detection module or the negative pole of the power supply control switch module. The current detection input end of the control module is connected with the output end of the current detection module, for obtaining the current detected by the current detection module, and outputting a corresponding control signal based on the relationship between the current and a preset determined current control condition. The input end of the control signal driving module is connected with the output end of the control module, and the output end of the control signal driving module is connected with the control end of the power supply control switch module, for obtaining the control signal output by the control module, and outputting a driving signal to the power supply control switch module based on the control signal, so as to drive the positive pole and the negative pole of the power supply control switch module to be in a conduction or off state. For example, when the current is too large, the positive pole and the negative pole of the power supply control switch module are driven to be in an off state.

[0070] It can be understood that, in an alternative embodiment, in order to be able to realize the handshake detection of the sub-gateway, so as to effectively control the access of the sub-gateway, the optical fiber power supply management circuit can further include a sub-gateway handshake detection module.

[0071] In detail, the input end of the sub-gateway handshake detection module is connected with the positive pole of the power supply control switch module or the negative pole of the input side of the optical fiber power supply interface module, and the output end of the sub-gateway handshake detection module is connected with the handshake detection input end of the control module, so that the control module is further used for analyzing the state of the sub-gateway connected with the optical fiber power supply interface module based on the signal output by the sub-gateway handshake detection module in response to the detected handshake detection signal, and driving the positive pole and the negative pole of the power supply control switch module to be in a conduction or off state through the control signal driving module based on the state. For example, when it is analyzed that the optical fiber power supply interface module is connected with a sub-gateway, the positive pole and the negative pole of the power supply control switch module can be driven to be in a conduction state, so as to supply power for the sub-gateway.

[0072] It can be understood that, in an alternative embodiment, in order to be able to realize the lightning surge protection of the power supply, and facilitate the sub-gateway handshake detection module to effectively detect the access of the sub-gateway, the optical fiber power supply management circuit can further include a port protection module.

[0073] In detail, the power supply positive pole of the port protection module is connected with the positive pole of the power supply module, the output positive pole of the port protection module is connected with the positive pole of the input side of the fiber power supply interface module, the output negative pole of the port protection module is connected with the negative pole of the input side of the fiber power supply interface module, and the load end negative pole of the port protection module is connected with the positive pole of the power supply control switch module. When power supply is needed for the sub-gateway, the direction of the current is as follows: the positive pole of the power supply module, the power supply positive pole of the port protection module, the output positive pole of the port protection module, the positive pole of the input side of the fiber power supply interface module, the positive pole of the output side of the fiber power supply interface module, the positive pole of the sub-gateway, the negative pole of the sub-gateway, the negative pole of the output side of the fiber power supply interface module, the negative pole of the input side of the fiber power supply interface module, the output negative pole of the port protection module, the load end negative pole of the port protection module, the positive pole of the power supply control switch module, the negative pole of the power supply control switch module, and the negative pole of the power supply module.

[0074] Based on this, when the output side of the fiber power supply interface module is not connected with the sub-gateway, at least part of the electrical elements inside the sub-gateway handshake detection module, at least part of the electrical elements inside the port protection module, and the positive pole and the negative pole of the power supply module form a communication loop. The level of the signal output by the sub-gateway handshake detection module is a first value, so that the control module determines that the output side of the fiber power supply interface module is not connected with the sub-gateway based on the signal.

[0075] In addition, when the output side of the fiber power supply interface module is connected with a sub-gateway satisfying the Ethernet standard, the characteristic resistance in the sub-gateway, at least part of the electrical elements inside the sub-gateway handshake detection module, and the positive pole and the negative pole of the power supply module form a communication loop. The level of the signal output by the sub-gateway handshake detection module is a second value, so that the control module determines that the output side of the fiber power supply interface module is connected with a sub-gateway and satisfies the Ethernet standard based on the signal.

[0076] In addition, when the output side of the fiber power supply interface module is connected with a sub-gateway and the sub-gateway does not satisfy the Ethernet standard, the characteristic resistance in the sub-gateway, at least part of the electrical elements inside the sub-gateway handshake detection module, and the positive pole and the negative pole of the power supply module form a communication loop. The level of the signal output by the sub-gateway handshake detection module is a third value, so that the control module determines that the output side of the fiber power supply interface module is connected with a sub-gateway and does not satisfy the Ethernet standard based on the signal.

[0077] It can be understood that, in an alternative embodiment, in order to further protect the equipment from current and voltage, and improve the operation safety of the equipment, the optical fiber power supply management circuit can further include an input overcurrent protection module and a voltage detection module.

[0078] In detail, the positive electrode of the input overcurrent protection module is connected to the negative electrode of the power supply module, and the negative electrode of the input overcurrent protection module is connected to the power supply positive electrode of the port protection module. The input end of the voltage detection module is connected to the negative electrode of the input overcurrent protection module or the power supply positive electrode of the port protection module, and the output end of the voltage detection module is connected to the voltage detection input end of the control module. The control module is further configured to drive the positive electrode and the negative electrode of the power supply control switch module to be in a conduction or off state through the control signal driving module based on the voltage detection signal input by the voltage detection input end.

[0079] In order to better understand the optical fiber power supply management circuit described above, on the basis of the above embodiment, the optical fiber power supply management circuit is further described in detail in combination with the specific structure and specific functions of each module in the optical fiber power supply management circuit. For details, please refer to the contents shown in Figures 4-13

[0080] The system power supply is input through the power supply module. The pin 2 of the ferrite bead element FB4 in the power supply module is connected to the pin 2 of the fuse F3 in the input overcurrent protection module. The pin 1 of the fuse F3 in the overcurrent protection module is connected to the power supply positive electrode PoF+ of the port protection module. The pin 1 of the fuse F3 in the overcurrent protection module is connected to the pin 1 of the resistor R41 in the voltage detection module. The ground of the voltage detection module is connected to the negative electrode of the power supply module. The pin 2 of the output resistor R52 of the voltage detection module outputs the power supply detection signal P1 to the pin P1 of the control module, and detects the input power supply voltage in real time.

[0081] The output positive electrode PoF+ of the port protection module is connected to the positive electrode PoF+ of the input side of the optical fiber power supply interface module, and the output negative electrode PoF- of the port protection module is connected to the negative electrode PoF- of the input side of the optical fiber power supply interface module. The optical fiber port of the optical fiber power supply interface module is connected to the downstream optical port 1 of the optical splitter. The optical fiber power supply interface module aggregates the optical fiber signal and the power supply, and then is connected to the sub-gateway through the optical and electrical composite cable to supply power to the sub-gateway and connect the optical path.

[0082] ​The load end negative pole PoF- of the port protection module is connected to the pin 3 (i.e. the drain) of the switching device Q9 of the power supply control switch module through the anti-reverse diode D11, and the load end negative pole PoF- is connected to the pin 1 of the resistance R36 of the sub-gateway handshake detection module, so that the accessed sub-gateway is detected and reported. The pin 1 of the capacitor C37 of the sub-gateway handshake detection module outputs the handshake detection signal F1 to the handshake detection pin F1 of the control module.

[0083] The pin 1 (i.e. the gate) of the switching device Q9 of the power supply control switch module is respectively connected to the pin of the switching device Q10 in the control signal driving module, and the pin 3 of the switching device Q11 in the output overcurrent protection module.

[0084] The pin 1 of the resistance R54 of the control signal driving module is connected to the control output pin S1 (i.e. the output end) of the control module.

[0085] The pin 2 of the switching device Q9 in the power supply control switch module is respectively connected to the pin 2 of the resistance R48 in the output overcurrent detection module and the pin 1 of the resistance R46 in the current detection module.

[0086] The ground end of the output overcurrent detection module is connected to the negative pole of the power supply module.

[0087] The pin 2 of the resistance R46 in the output overcurrent detection module is connected to the pin L1 of the control module, so as to detect the power supply current of the sub-gateway in real time.

[0088] The control module is a general microcontroller unit (MCU) or other central processing unit (CPU) unit. In the embodiment of the present application, when the 1:4 optical power splitter scheme is adopted, since there are four optical fiber power interface modules, the control module needs to have four groups of independent control signals.

[0089] The embodiment of the present application takes a group of downlink optical port 1 as an example to describe the signal requirements:

[0090] 1. P1: power supply voltage detection signal;

[0091] 2. F1: load detection handshake signal;

[0092] 3. S1: power supply switch control signal;

[0093] 4. L1: load current detection signal;

[0094] Since the power supply voltage is shared in the system, only the P1 power supply voltage signal detection is required in the embodiment of the application, and the remaining unmarked lower link optical ports 2, 3 and 4 can not be separately connected with the P1 signal and can directly use the detected power supply voltage P1.

[0095] Meanwhile, since the P1, S1 and L1 signals are analog detection signals, the corresponding pins P1, S1 and L1 of the control module need to have an analog / digital converter (ADC) function, and the collected P1, S1 and L1 analog signals are converted into corresponding digital signals for processing.

[0096] In the embodiment of the application, the 1:4 optical-electric splitter system uses four groups of relatively independent lower link interfaces, and therefore the control module needs a total of nine independent pins with an analog / digital converter (ADC) function to process the signals detected by the four groups of lower links respectively.

[0097] Input power supply voltage abnormality detection:

[0098] The system power supply is input from the power supply module, connected to the pin 1 of the resistor R41 in the voltage detection module after passing through the input overcurrent protection module, and the power supply voltage is connected to the pin 1 of the resistor R53 through the pin 2 of the resistor R41, and the pin 2 of the resistor R53 is connected to the negative electrode of the power supply module. The input power supply is divided by the resistors R41 and R53, and the output power supply voltage detection signal P1 is connected to the pin P1 of the control module through the pin 2 of the resistor R52, and the input power supply voltage is sampled and processed. The control module detects the voltage division signal of the resistors R41 and R53, and outputs a detection voltage signal Vp1 after voltage division detection, and the calculation formula of Vp1 is: Vp1=Power supply* (R41 / (R41+R53)). According to the values of the resistors R41 and R53 set, when the Vp1 detection voltage belongs to the range of [2.485V ~ 2.65V], it is confirmed that the power supply voltage is normal, when it is lower than the range, the control module determines that the power supply voltage is too low, which is an abnormal condition; when it is higher than the range, the control module determines that the power supply voltage is too high, which is an abnormal condition. In these two abnormal conditions, the control module outputs a switch control signal to forcibly close the power supply control switch module, forcibly closes the power supply circuit of the optical fiber power supply interface module and the sub-gateway, protects the sub-gateway, outputs an alarm signal, and enters the next round of power supply voltage detection action. When the detection voltage signal satisfies the range of [2.485V ~ 2.65V], the control module determines that the power supply voltage meets the specification requirements, and enters the next handshake / detection workflow.

[0099] Input power supply current abnormality detection:

[0100] In the embodiment of the application, four sub-gateways can be hung down. Taking the maximum working power consumption of each sub-gateway meeting the 802.3 AF (15.4W) standard as an example, the total power consumption of the four sub-gateways is 61.6W, plus the working power consumption of the optical fiber power supply management circuit itself 1W, and plus the margin, when the working power consumption is greater than 63.5W, it is determined to be over-power, at this time, the fuse (safety wire) used in the input over-current protection module works, and the input power supply is disconnected, thereby protecting the optical fiber power supply management circuit and the sub-gateway, when the working power consumption is less than 63.5W, the self-restoring fuse used in the input over-current protection module works normally.

[0101] Sub-gateway handshake / detection working procedure:

[0102] Handshake detection when not accessing the sub-gateway:

[0103] When it is detected that the power supply voltage meets the specification requirements and the power supply current meets the design requirements, the sub-gateway handshake detection module detects whether the optical fiber power supply interface module has a sub-gateway access, when the optical fiber power supply interface module has no sub-gateway access, the sub-gateway handshake detection module forms a loop through the resistance R38, the diode D10 in the port protection module and the resistance R36, the resistance R65 and the resistance R66 in the sub-gateway handshake detection module, at this time, the handshake / detection signal F1 output by the sub-gateway handshake detection module is about 2.185V, the handshake / detection signal F1 of the sub-gateway handshake detection module is input to the control module, it is determined that the optical fiber power supply interface module has no sub-gateway access, and the handshake detection phase is continued.

[0104] When accessing the sub-gateway meeting the 802.3 AF standard:

[0105] When the fiber power supply interface module accesses the sub-gateway meeting the 802.3 AF standard, the sub-gateway meeting the 802.3 AF standard provides a characteristic resistance Rpd with a resistance of about 24.9K, and the specification requires that the Rpd range is [16K ~ 26.5K], at this time, the characteristic resistance Rpd and the resistance R36, the resistance R65, the resistance R66 in the sub-gateway handshake detection module form a loop. The Vp1 detection voltage is about [2.5V ~ 2.6V] this time, the Vp1 detection voltage is input to the control module, at this time, it is determined that the fiber power supply interface module has a sub-gateway access, and the accessed sub-gateway device meets the 802.3 AF standard, and the sub-gateway is powered. The control module outputs the control signal S1 to the control signal driving module, and the control signal driving module outputs the control signal S1 Ctrl to the power supply control switch module, so as to control the power supply control switch module to open, so as to turn on the pin 3 (drain) and the pin 2 (source) of the switching device Q9 of the power supply control switch module, so as to connect to the negative electrode of the power supply module through the output overcurrent detection module, so as to form a power supply loop for the fiber power supply interface module and the sub-gateway, and the sub-gateway is powered on.

[0106] When the sub-gateway not meeting the 802.3 AF standard is accessed-A:

[0107] When the fiber power supply interface module accesses the sub-gateway not meeting the 802.3 AF standard, at this time, the sub-gateway also provides a characteristic resistance Rpd with a resistance of non-24.9K, at this time, the characteristic resistance Rpd and the resistance R36, the resistance R65, the resistance R66 in the sub-gateway handshake detection module form a loop. In order to be compatible with more non-standard sub-gateways, the judgment range of the characteristic resistance Rpd is set to 【12K ~ 39K】, so that the standard sub-gateway and the non-standard sub-gateway can be compatible at the same time, at this time, the Vp1 detection voltage is 【2.48V ~ 2.63V】, and the Vp1 detection voltage is output to the control module. When the Vp1 detection voltage meets 【2.48 ~ 2.63V】, at this time, it is determined that there is a sub-gateway access, and the accessed sub-gateway is powered. The control module outputs the control signal S1 to the control signal driving module, and the control signal driving module outputs the control signal S1 Ctrl to the power supply control switch module, so as to control the power supply control switch module to open, so as to turn on the pin 3 and the pin 2 of the switching device Q9 of the power supply control switch module, so as to connect to the negative electrode of the power supply module through the output overcurrent detection module, so as to form a power supply loop for the fiber power supply interface module and the sub-gateway, and the fiber power supply interface module powers on the sub-gateway.

[0108] When the sub-gateway not meeting the 802.3 AF standard is accessed-B:

[0109] When the fiber power supply interface module accesses a sub-gateway that does not meet the 802.3 AF standard, the sub-gateway also provides a characteristic resistance Rpd with a resistance value other than 24.9K at this time, and the characteristic resistance Rpd forms a loop with the resistance R36, the resistance R65, and the resistance R66 in the sub-gateway handshake detection module. In order to be compatible with more non-standard sub-gateways, the Rpd judgment range is set to 【12K~39K】, so that the standard sub-gateway and the non-standard sub-gateway can be compatible at the same time, and the Vp1 detection voltage is 【2.48V ~2.63V】 at this time. The Vp1 detection voltage is output to the control module. When the Vp1 detection voltage does not meet 【2.48V~2.63V】 after accessing the sub-gateway, it is determined that the accessed device is a non-standard sub-gateway, and the accessed sub-gateway can also not be powered. The control module outputs a control signal S1 to the control signal driving module, and the control signal driving module outputs a control signal S1_Ctrl to the power supply control switch module, so as to control the power supply control switch module to forcibly close, ensure that the pin 3 and the pin 2 of the switching device Q9 of the power supply control switch module are not conductive, the power supply loop of the fiber power supply interface module and the sub-gateway cannot be formed, and the fiber power supply interface module does not power on the sub-gateway.

[0110] Sub-gateway device overcurrent protection

[0111] When the power supply fiber power supply interface module normally powers on the accessed sub-gateway, the current detection module detects the real-time working current of the accessed sub-gateway. The current detection module detects the output current, and the current detection module is connected to the detection pin L1 of the control module through the pin 2 of the resistance R46. The maximum power consumption of the sub-gateway is 15.4W of the 802.3 AF standard, the working current of the sub-gateway is detected in real time, and the real-time power consumption of the sub-gateway is calculated by combining the power supply voltage detected by the voltage detection module in the control module.

[0112] When the power consumption of the sub-gateway exceeds 15.4W of the 802.3 AF standard, it is determined that the sub-gateway appears abnormal or short circuit, and two methods can be used to respond and process at the same time.

[0113] Method one: when the power consumption of the sub-gateway exceeds 15.4W of the 802.3 AF standard, the control module outputs a control signal S1 to the control signal driving module, and the control signal driving module outputs a control signal S1_Ctrl to the power supply control switch module, so as to control the power supply control switch module to forcibly close, ensure that the pin 3 and the pin 2 of the switching device Q9 of the power supply control switch module are not conductive, the power supply loop of the sub-gateway cannot be formed, and the sub-gateway is forcibly powered off to protect the sub-gateway. Method one is a method of actively monitoring the working power consumption of the sub-gateway, which can monitor the working power consumption of the sub-gateway in real time, respond in time when the power consumption of the sub-gateway is abnormal, and stop powering the sub-gateway, so as to protect the sub-gateway.

[0114] Method two: the pin 2 of the resistor R45 in the output over-current protection module detects the load current detection signal of the pin 2 of the resistor R48 in the output over-current detection module, when the power consumption of the sub-gateway exceeds 15.4W of the 802.3 AF standard, the load current detection signal is output to the negative pole of the power supply module through the pin 2 of the resistor R51 in the output over-current protection module, thereby forming a power supply loop, and the over-current detection voltage Vp is automatically generated at the pin 2 of the resistor R51, when the power consumption of the sub-gateway exceeds 15.4W limited by the 802.3 AF standard, the detection voltage Vp automatically generated reaches the Vbe on opening point required by the triode Q11 in the output over-current protection module, the triode Q11 is immediately turned on, the pin 3 (collector) of the triode is turned on with the pin 2 (emitter), thereby automatically providing the driving signal S_Ctrl to the power supply control switch module, thereby controlling the power supply control switch module to forcibly close the power supply, ensuring that the pin 3 of the switch device Q9 of the power supply control switch module is not turned on with the pin 2, the power supply loop of the sub-gateway cannot be formed, and the sub-gateway is forcibly powered off, thereby protecting the sub-gateway.

[0115] The embodiment of the present application further provides an optical fiber power supply management method which can be applied to the optical fiber power supply management circuit, and the optical fiber power supply management method can include the following steps:

[0116] After the power supply module provides the input voltage, the voltage detection module detects whether the input voltage is in the nominal range, and when the input voltage is in the nominal range and the input over-current protection module does not perform over-current protection and the port protection module does not perform lightning surge protection, the sub-gateway handshake detection module detects whether the output side of the optical fiber power supply interface module is connected with the sub-gateway; when the output side of the optical fiber power supply interface module is connected with the sub-gateway, the control signal driving module outputs the driving signal to the power supply control switch module to drive the anode and the cathode of the power supply control switch module to be in the conduction state, thereby realizing the power supply to the sub-gateway.

[0117] The specific content of each step can be referred to the related explanation and description of the optical fiber power supply management circuit in the foregoing, and will not be repeated here.

[0118] To sum up, for the optical fiber power supply management circuit, method and FTTR device provided in the application, the optical fiber power supply management circuit comprises: a power supply module, wherein the positive electrode of the input side of the optical fiber power supply interface module is connected with the positive electrode of the power supply module, and the output side of the optical fiber power supply interface module is connected with the sub-gateway through the optical-electrical composite cable; and a power supply control switch module, wherein the positive electrode of the power supply control switch module is connected with the negative electrode of the input side of the optical fiber power supply interface module, and the negative electrode of the power supply control switch module is connected with the negative electrode of the power supply module; wherein when power supply to the sub-gateway is needed, the power supply control switch module controls the positive electrode and the negative electrode to be turned on to form a power supply loop; and when power supply to the sub-gateway is not needed, the power supply control switch module controls the positive electrode and the negative electrode to be turned off so that the power supply loop is disconnected and the power supply to the sub-gateway is stopped. Based on the above, since the power supply control switch module is configured, the power supply loop can be formed when power supply to the sub-gateway is needed, and the power supply loop can be disconnected when power supply to the sub-gateway is not needed, so that the power supply to the sub-gateway is effectively managed, and the problem that the power supply to the sub-gateway cannot be controlled when a safety accident occurs or the power supply cannot be effectively restored after the safety accident is avoided, and therefore the problem that the safety of optical fiber power supply in the prior art is relatively low can be improved.

[0119] The above only describes the preferred embodiments of the application and is not used to limit the application. The application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A power over fiber management circuit, comprising: The application is applied to an FTTR device, the FTTR device comprises a main gateway, an optical splitter, a fiber power supply interface module and a sub-gateway, the main gateway provides an optical fiber signal for the sub-gateway through the optical splitter and the fiber power supply interface module, wherein the fiber power supply management circuit comprises: a power supply module, wherein the positive pole of the input side of the fiber power supply interface module is connected with the positive pole of the power supply module, and the output side of the fiber power supply interface module is connected with the sub-gateway through an optical-electrical composite cable to supply power and provide an optical fiber signal for the sub-gateway; a power supply control switch module, wherein the positive pole of the power supply control switch module is connected with the negative pole of the input side of the fiber power supply interface module, and the negative pole of the power supply control switch module is connected with the negative pole of the power supply module; wherein when power supply is needed for the sub-gateway, the power supply control switch module controls the positive pole and the negative pole to be turned on, so that the positive pole of the power supply module, the positive pole of the input side of the fiber power supply interface module, the positive pole of the output side of the fiber power supply interface module, the positive pole of the sub-gateway, the negative pole of the sub-gateway, the negative pole of the output side of the fiber power supply interface module, the negative pole of the input side of the fiber power supply interface module, the positive pole of the power supply control switch module, the negative pole of the power supply control switch module and the negative pole of the power supply module form a power supply loop; when power supply is not needed for the sub-gateway, the power supply control switch module controls the positive pole and the negative pole to be turned off, so that the power supply loop is disconnected and the power supply for the sub-gateway is stopped; the fiber power supply management circuit further comprises: an output overcurrent detection module, wherein the positive pole of the output overcurrent detection module is connected with the negative pole of the power supply control switch module, and the negative pole of the output overcurrent detection module is connected with the negative pole of the power supply module; an output overcurrent protection module, wherein the input end of the output overcurrent protection module is connected with the overcurrent detection signal output end of the output overcurrent detection module, and the output end of the output overcurrent protection module is connected with the control end of the power supply control switch module; wherein when the overcurrent detection signal output from the overcurrent detection signal output end represents that there is an overcurrent condition, the output overcurrent protection module outputs an overcurrent protection signal for controlling the positive pole and the negative pole of the power supply control switch module to be turned off in response to the overcurrent detection signal; the fiber power supply management circuit further comprises: a current detection module, wherein the detection end of the current detection module is connected with the positive pole of the output overcurrent detection module or the negative pole of the power supply control switch module; a control module, wherein the current detection input end of the control module is connected with the output end of the current detection module, for acquiring the current detected by the current detection module, and outputting a corresponding control signal based on the relationship between the current and a preset determined current control condition; A control signal driving module, wherein an input end of the control signal driving module is connected with an output end of the control module, and an output end of the control signal driving module is connected with a control end of the power supply control switch module, for obtaining a control signal output by the control module, and outputting a driving signal to the power supply control switch module based on the control signal, so as to drive the positive pole and the negative pole of the power supply control switch module to be in a conducting or off state; The power over fiber management circuit further comprises: A sub-gateway handshake detection module, wherein an input end of the sub-gateway handshake detection module is connected with the positive pole of the power supply control switch module or the negative pole of the input side of the power over fiber interface module, and an output end of the sub-gateway handshake detection module is connected with a handshake detection input end of the control module, so that the control module is further used for analyzing a state of a sub-gateway connected with the power over fiber interface module based on a signal output by the sub-gateway handshake detection module in response to a detected handshake detection signal, and driving the positive pole and the negative pole of the power supply control switch module to be in a conducting or off state based on the state through the control signal driving module.

2. The power over fiber management circuit of claim 1, wherein, The power over fiber management circuit further comprises: A port protection module, wherein a power supply positive pole of the port protection module is connected with the positive pole of the power supply module, an output positive pole of the port protection module is connected with the positive pole of the input side of the power over fiber interface module, an output negative pole of the port protection module is connected with the negative pole of the input side of the power over fiber interface module, and a load end negative pole of the port protection module is connected with the positive pole of the power supply control switch module, so that when power supply to the sub-gateway is needed, the direction of current is the positive pole of the power supply module, the power supply positive pole of the port protection module, the output positive pole of the port protection module, the positive pole of the input side of the power over fiber interface module, the positive pole of the output side of the power over fiber interface module, the positive pole of the sub-gateway, the negative pole of the sub-gateway, the negative pole of the output side of the power over fiber interface module, the negative pole of the input side of the power over fiber interface module, the output negative pole of the port protection module, the load end negative pole of the port protection module, the positive pole of the power supply control switch module, the negative pole of the power supply control switch module, and the negative pole of the power supply module. When the output side of the power over fiber interface module is not connected with the sub-gateway, at least part of electrical elements in the sub-gateway handshake detection module, at least part of electrical elements in the port protection module, and the positive pole and the negative pole of the power supply module form a communication loop, and the level of the signal output by the sub-gateway handshake detection module is a first value, so that the control module determines that the output side of the power over fiber interface module is not connected with the sub-gateway based on the signal.

3. The fiber powered management circuit of claim 2, wherein, When a sub-gateway meeting the Ethernet standard is connected to the output side of the power over fiber interface module, the characteristic resistance in the sub-gateway, at least part of the electrical elements inside the sub-gateway handshake detection module and the positive and negative poles of the power module form a communication loop, the level of the signal output by the sub-gateway handshake detection module is the second value, so that the control module determines that the output side of the power over fiber interface module is connected to the sub-gateway meeting the Ethernet standard based on the signal.

4. The fiber powered management circuit of claim 2, wherein, When a sub-gateway meeting the Ethernet standard is connected to the output side of the power over fiber interface module, the characteristic resistance in the sub-gateway, at least part of the electrical elements inside the sub-gateway handshake detection module and the positive and negative poles of the power module form a communication loop, the level of the signal output by the sub-gateway handshake detection module is the third value, so that the control module determines that the output side of the power over fiber interface module is connected to the sub-gateway not meeting the Ethernet standard based on the signal.

5. The fiber powered management circuit of claim 2, wherein, The power over fiber management circuit further comprises: an input overcurrent protection module, wherein the positive pole of the input overcurrent protection module is connected to the negative pole of the power module, and the negative pole of the input overcurrent protection module is connected to the power supply positive pole of the port protection module; a voltage detection module, wherein the input end of the voltage detection module is connected to the negative pole of the input overcurrent protection module or the power supply positive pole of the port protection module, the output end of the voltage detection module is connected to the voltage detection input end of the control module, and the control module is further configured to drive the positive and negative poles of the power supply control switch module to be in the on or off state by the control signal driving module based on the voltage detection signal input by the voltage detection input end.

6. A power over optical fiber management method, characterized by, The power over fiber management circuit applied to the control module of any one of claims 1-5 further comprises a power module, a voltage detection module, an input overcurrent protection module, a port protection module, a sub-gateway handshake detection module and a control signal driving module, wherein the power over fiber management method comprises: after the power module provides a power supply voltage, detecting whether the power supply voltage is within a nominal range by the voltage detection module, and when the power supply voltage is within the nominal range and the input overcurrent protection module does not perform overcurrent protection and the port protection module does not perform lightning surge protection, detecting whether the output side of the power over fiber interface module is connected to a sub-gateway by the sub-gateway handshake detection module; when the output side of the power over fiber interface module is connected to a sub-gateway, outputting a driving signal to the power supply control switch module by the control signal driving module to drive the positive and negative poles of the power supply control switch module to be in the on state, thereby realizing power supply to the sub-gateway.

7. An FTTR device, characterized by, The power over fiber management circuit comprises a main gateway, an optical splitter, a power over fiber interface module, a sub-gateway and any one of claims 1-5.

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