Optical network unit with power over Ethernet

Abstract

The invention relates to the technical field of communication, in particular to an optical network unit with power over Ethernet, which comprises a main control unit; the photoelectric composite port is connected with the main control unit; the power supply selection unit is connected with the photoelectric composite port and the direct current power supply port; the direct-current voltage converter is connected with the power supply selection unit and the main control unit; the Ethernet power supply equipment is connected with the power supply selection unit and the DC voltage converter; the input end of the converter is connected with the main control unit, the output end of the converter is respectively connected with local area network equipment through a plurality of interfaces, and the local area network equipment is connected with the output end of Ethernet power supply equipment. According to the invention, the POF and the PSE are perfectly matched, the power supply management difficulty of the equipment is simplified, the installation layout construction cost is better simplified, and the equipment is optimized in the aspects of size and heating.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to an optical network unit. Background Art

[0002] With the rapid development of fiber-optic communication industry technology, home networks are now basically connected using fiber-optic communication technology, and are covered by home optical modems. Conventional optical fibers use glass fibers to transmit optical data, and compared to network cable transmission, they cannot provide Ethernet power supply (PoE, Power over Ethernet) capabilities. Access to optical modems requires local power supply with adapters. In centralized power supply management scenarios, such as campus and enterprise coverage solutions, local power supply wiring is required at the optical modem layout point, which increases the difficulty of wiring and fixing the adapter. If the Ethernet PoE centralized power supply mode is adopted, this process can be simplified, and the network can be completed with only one optical fiber line.

[0003] In recent years, along with the pain points of fiber-optic power supply mentioned above, the industry has also upgraded fiber-optic power supply. Currently, there is a fiber-optic power supply interface (PoF, Power on Fiber). Through special interface definitions, traditional optical ports can provide power supply capabilities.

[0004] Conventional power supply switches can provide a certain power supply capacity on the network port and manage the power supply for the downstream devices. This type of equipment with Ethernet port power supply capability (PSE, Power Sourcing Equipment) is responsible for injecting power into the Ethernet line and implementing power planning and management. In order to provide Ethernet power supply capabilities, general switch equipment will have the power module built into the device, so the device is usually larger in size; at the same time, because the power supply is built into the device, the overall heat is also relatively high, affecting the overall product life. Summary of the invention

[0005] In view of the above problems, an object of the present invention is to provide an optical network unit with Power over Ethernet.

[0006] An optical network unit with Ethernet power supply, comprising:

[0007] Main control unit;

[0008] An optoelectronic composite port, connected to the main control unit;

[0009] A power supply selection unit, connected to the photoelectric composite port and a DC power supply port;

[0010] A DC voltage converter, connected to the power supply selection unit and the main control unit;

[0011] An Ethernet power supply device, connected to the power supply selection unit and the DC voltage converter;

[0012] A converter, wherein the input end of the converter is connected to the main control unit, the output end of the converter is connected to a local area network device through multiple interfaces, and the local area network device is connected to the output end of the Ethernet power supply device.

[0013] In the optical network unit with Ethernet power supply of the present invention, the power supply selection unit determines whether to support power supply to the Ethernet power supply device according to whether the optical-electrical composite port or the DC power supply port is used in the incoming call mode.

[0014] The optical network unit with Ethernet power supply described in the present invention also includes:

[0015] A bridge rectifier, wherein a first input end of the bridge rectifier is connected to a first output end of the photoelectric composite port, and a second input end of the bridge rectifier is connected to a second output end of the photoelectric composite port;

[0016] A voltage stabilizer, wherein a first end of the voltage stabilizer is connected to a first output end of the photoelectric composite port, and a second end of the voltage stabilizer is connected to a second output end of the photoelectric composite port.

[0017] In the optical network unit with Ethernet power supply of the present invention, the power supply selection unit includes a power supply device interface controller, and the power supply device interface controller includes:

[0018] a positive power input terminal connected to a first power supply voltage with the first output terminal of the bridge rectifier;

[0019] A negative power input terminal connected to the second output terminal of the bridge rectifier;

[0020] A first resistor is connected between the detection resistor input terminal and the positive power supply input terminal;

[0021] A second resistor is connected between the classification detection terminal and the positive power input terminal;

[0022] Indicates the open-drain output terminal, outputting the PG signal through the third resistor;

[0023] Isolation terminal, connected to the ground terminal;

[0024] A fourth resistor is connected between the grading resistor input terminal and the negative power supply input terminal;

[0025] The adapter detection input terminal is connected to the ground terminal through a fifth resistor, and the adapter detection input terminal is also connected to a first end of a first voltage regulator diode through a sixth resistor, and a second end of the first voltage regulator diode is connected to the second power supply voltage.

[0026] The optical network unit with Ethernet power supply described in the present invention includes a voltage converter, and the voltage converter includes:

[0027] An input voltage terminal, connected to the first power supply voltage, the input voltage terminal is also connected to the second power supply voltage through a first diode, and the input voltage terminal is also connected to a ground terminal through a first capacitor;

[0028] An enable terminal connected to the PG signal, the enable terminal is also connected to the input voltage terminal through a seventh resistor, and the enable terminal is also connected to a ground terminal through an eighth resistor;

[0029] A soft start terminal connected to a ground port via a third capacitor, wherein the ground port is connected to the ground terminal;

[0030] An output end, connected to a main system power supply port through a first inductor, the main system power supply port is connected to a ground terminal through a fourth capacitor, and the output end is connected to the ground terminal through a rectifier;

[0031] A feedback voltage terminal is connected to the main system power supply port through a ninth resistor, the feedback voltage terminal is also connected to the ground terminal through a tenth resistor, and a fifth capacitor is connected in parallel to both ends of the ninth resistor;

[0032] A switching frequency selection terminal connected to a ground terminal via an eleventh resistor;

[0033] The bootstrap terminal is connected to the output terminal via a sixth capacitor.

[0034] The optical network unit with Ethernet power supply of the present invention comprises a power interface, a first end of the power interface is connected to a first end of a fuse, a second end of the power interface is connected to a third end, and is connected to the second end of the fuse through a surge protector;

[0035] The second end of the fuse is connected to the power supply end of the Ethernet power supply device through the second diode, and the power supply end of the Ethernet power supply device is connected to the ground end through the seventh capacitor; the second end of the fuse is also connected to the second power supply voltage through the third diode, and a fourth diode is connected in parallel at both ends of the second diode;

[0036] A twelfth resistor, wherein the first end of the twelfth resistor is connected to the second end of the fuse, the second end of the twelfth resistor is connected to the gate of an NMOS tube, the drain of the NMOS tube is connected to the ground terminal, and the source of the NMOS tube is connected to the second end of the surge protector.

[0037] In the optical network unit with Ethernet power supply described in the present invention, the power interface is connected to an external DC power adapter.

[0038] In the optical network unit with Ethernet power supply described in the present invention, an eighth capacitor is further connected between the source and the gate of the NMOS tube;

[0039] A thirteenth resistor is also connected between the source and the gate of the NMOS tube, and is connected in parallel with the eighth capacitor;

[0040] A second voltage stabilizing diode is also connected between the source and the gate of the NMOS tube and is connected in parallel with the eighth capacitor.

[0041] The optical network unit with Ethernet power supply of the present invention, the power supply selection unit supports powering the Ethernet power supply device and powering the main system when the DC power supply port is powered according to the incoming call mode

[0042] Beneficial effects: The present invention perfectly matches the optical fiber port power supply POF and the Ethernet power supply PSE, simplifies the difficulty of equipment power supply management, better simplifies the installation layout and construction costs, and optimizes the equipment in terms of size and heat generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a topological diagram of an optical network unit of the present invention;

[0044] Figure 2 It is a principle block diagram of the optical network unit of the Ethernet power supply interface of the present invention;

[0045] Figure 3 It is a main circuit diagram of the optical network unit of the Ethernet power supply interface of the present invention;

[0046] Figure 4 It is a schematic diagram of the power supply path of the present invention using the photoelectric composite port for power supply;

[0047] Figure 5 It is a schematic diagram of the power supply path of the Ethernet power supply device supported by the present invention. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0050] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0051] Reference Figure 1 , an optical network unit with an Ethernet power supply interface, the DC power adapter is placed outside the main device. Compared with traditional optical network units with integrated power supply, the overall size of the product is smaller, which is more suitable for miniaturized installation scenarios. Powered by an external DC power adapter, the heat generated by the power supply can be effectively kept away from the mainboard, improving system reliability; because it is powered by an external DC power adapter, there is no need to add active heat dissipation design inside, which effectively reduces dust accumulation; maintenance is simplified. If there is a power failure in the equipment, the DC power adapter can be directly replaced without dismantling the entire device. Different DC power adapters can be configured according to the usage scenario. If only four ports are needed for Ethernet power supply, a low-power adapter can be directly selected. If eight ports are needed for Ethernet power supply, only a high-power adapter needs to be replaced. It is more flexible for engineering construction and effectively controls costs.

[0052] Reference Figure 2 , an optical network unit with Ethernet power supply, comprising,

[0053] Main control unit 1;

[0054] Optoelectronic composite port SC, connected to the main control unit 1;

[0055] A power supply selection unit C, connected to the photoelectric composite port SC and a DC power supply port B;

[0056] A direct current voltage converter (DC-DC) D, connected to the power supply selection unit C and the main control unit 1;

[0057] Ethernet power supply equipment (PSE) E, connected to the power supply selection unit C and the DC voltage converter D;

[0058] Converter 2, the input end of the converter 2 is connected to the main control unit 1, the output end of the converter 2 is connected to a LAN device through multiple MDI interfaces, the LAN device is connected to the output end of the Ethernet power supply device E, and the LAN device is connected to the external device of the optical network unit through the RJ-45 port; if eight LAN devices are included, LAN1 to LAN8 are connected to the Ethernet power supply device E.

[0059] The present invention is based on the consideration of the safety of the photoelectric composite cable. Generally, the maximum power supply load capacity of the photoelectric composite cable is 1.3A. If it is to support Ethernet power supply, it may cause the cable to be overloaded. In some usage scenarios where the downlink power supply is not required, it is more convenient to use the photoelectric composite cable to centrally manage the power supply. At the same time, the photoelectric composite power supply method is adopted. In order to ensure the reliability of the system, the power supply device interface controller is cooperated to ensure that the power size of the photoelectric composite port is the power supply standard of the composite standard 802.3af / at standard PoE, which effectively ensures the safety of the equipment on the receiving side. If there is a scenario where local power supply is required, it is necessary to match the local DC power adapter and directly power the system from the DC power supply port B. At this time, the power supply selection unit C will determine that the external DC power adapter is powered. Even if the photoelectric composite port SC is also powered, the power supply of the DC power supply port will be used to power it, avoiding the power supply risk of the photoelectric composite port SC. In addition, according to the load size required for Ethernet power supply, different adapters can be matched, which can effectively reduce costs and increase efficiency.

[0060] Reference Figure 3 , a preferred embodiment of the present invention further comprises:

[0061] A bridge rectifier D34, wherein a first input end of the bridge rectifier D34 is connected to a first output end of the optoelectronic composite port SC, and a second input end of the bridge rectifier D34 is connected to a second output end of the optoelectronic composite port SC;

[0062] A voltage stabilizer D33, wherein a first end of the voltage stabilizer D33 is connected to a first output end of the optoelectronic composite port SC, and a second end of the voltage stabilizer D33 is connected to a second output end of the optoelectronic composite port SC.

[0063] A preferred embodiment of the present invention further includes:

[0064] The power supply selection unit C includes a power supply device interface controller U20, and the power supply device interface controller U20 includes:

[0065] A positive power input terminal VDD and a first output terminal of the bridge rectifier D34 are connected to a first power voltage VDD_48V;

[0066] A negative power input terminal VSS is connected to the second output terminal of the bridge rectifier D34;

[0067] A first resistor R163 is connected between the detection resistor input terminal DET and the positive power input terminal VDD;

[0068] A second resistor R160 is connected between the classification detection terminal 2EC and the positive power input terminal VDD;

[0069] Indicates the open-drain output terminal PG, outputting the PG signal through the third resistor R165;

[0070] The isolation terminal RTN is connected to the ground terminal;

[0071] A fourth resistor R164 is connected between the grading resistor input terminal CLS and the negative power input terminal VSS;

[0072] an adapter detection input terminal WAD, the adapter detection input terminal WAD is connected to the ground terminal through a fifth resistor R171, the adapter detection input terminal WAD is also connected to a first end of a first voltage zener diode PD1 through a sixth resistor R170, and a second end of the first voltage zener diode PD1 is connected to the second power supply voltage VIN_48V;

[0073] The EP terminal of the power supply device interface controller U20 is connected to the ground terminal.

[0074] A preferred embodiment of the present invention includes a voltage converter PU4, wherein the voltage converter PU4 includes:

[0075] An input voltage terminal IN is connected to the first power supply voltage VDD_48V. The input voltage terminal IN is also connected to the second power supply voltage VIN_48V via a first diode D35. The input voltage terminal IN is also connected to a ground terminal via a first capacitor C252.

[0076] An enable terminal EN, connected to the PG signal, the enable terminal EN is also connected to the input voltage terminal IN through a seventh resistor R143, and the enable terminal EN is also connected to the ground terminal through an eighth resistor R153;

[0077] The soft start terminal SS is connected to the ground port GND through a third capacitor C261, and the ground port GND is connected to the ground terminal;

[0078] The output terminal SW is connected to the main system power supply port P12V through the first inductor PL3, the main system power supply port P12V is connected to the ground terminal through the fourth capacitor C256, and the output terminal SW is connected to the ground terminal through the rectifier D21;

[0079] A feedback voltage terminal FB is connected to the main system power supply port P12V through a ninth resistor R142, and the feedback voltage terminal FB is also connected to the ground terminal through a tenth resistor R154, and a fifth capacitor C246 is connected in parallel to both ends of the ninth resistor R142;

[0080] The switching frequency selection terminal RT is connected to the ground terminal through the eleventh resistor R155;

[0081] The bootstrap terminal BS is connected to the output terminal SW via a sixth capacitor C245;

[0082] EP terminal is connected to the ground terminal.

[0083] Reference Figure 4 The red arrow is a schematic diagram of the main system power supply in the PoF power supply mode. The photoelectric composite cable is used to power the main system from the photoelectric composite port SC. The power selection unit C, specifically the power supply device interface controller U20, determines the incoming call mode, whether the photoelectric composite cable or the DC power supply port is used, and then determines the working mode of the product, whether it supports the Ethernet power supply function externally.

[0084] A preferred embodiment of the present invention further includes:

[0085] A power interface J1, wherein a first end of the power interface J1 is connected to a first end of a fuse RF3, a second end of the power interface J1 is connected to a third end, and is connected to a second end of the fuse RF3 via a surge protector D32, and the power interface J1 is connected to an external DC power adapter;

[0086] The second end of the fuse RF3 is connected to the power supply end VPSE of the Ethernet power supply device through the second diode D31, and the power supply end VPSE of the Ethernet power supply device is connected to the ground end through the seventh capacitor C247; the second end of the fuse RF3 is also connected to the second power supply voltage VIN_48V through the third diode D1, and a fourth diode D36 is connected in parallel at both ends of the second diode D31.

[0087] a twelfth resistor R144, wherein a first end of the twelfth resistor R144 is connected to a second end of the fuse RF3, a second end of the twelfth resistor R144 is connected to a gate of an NMOS tube Q5, a drain of the NMOS tube Q5 is connected to a ground terminal, and a source of the NMOS tube Q5 is connected to a second end of the surge protector D32;

[0088] An eighth capacitor C253 is also connected between the source S and the gate G of the NMOS transistor Q5;

[0089] A thirteenth resistor R156 is also connected between the source S and the gate G of the NMOS transistor Q5, and is connected in parallel with the eighth capacitor C253;

[0090] A second voltage stabilizing diode PD4 is also connected between the source S and the gate G of the NMOS transistor Q5 and is connected in parallel with the eighth capacitor C253.

[0091] Reference Figure 5 , the red arrow shows that the present invention is locally powered, and can also support external Ethernet power supply and power supply to the main system.

[0092] The present invention provides an optical network unit (ONU) with Ethernet power supply capability, which perfectly matches the optical fiber port power supply POF and the Ethernet power supply PSE, simplifies the difficulty of equipment power supply management, better simplifies the installation layout construction cost, and optimizes the size and heat generation of the equipment.

[0093] Through the description and drawings, typical embodiments of the specific structures of the specific implementation methods are given, and other transformations can be made based on the spirit of the present invention. Although the above invention proposes the existing preferred embodiments, these contents are not intended to be limiting.

[0094] For those skilled in the art, various changes and modifications will undoubtedly be obvious after reading the above description. Therefore, the attached claims should be regarded as covering all changes and modifications of the true intent and scope of the present invention. Any and all equivalent ranges and contents within the scope of the claims should be considered to still be within the intent and scope of the present invention.

Claims

1. An optical network unit with Ethernet power supply, characterized in that: include, Main control unit; An optoelectronic composite port, connected to the main control unit; A power supply selection unit, connected to the photoelectric composite port and a DC power supply port; A DC voltage converter, connected to the power supply selection unit and the main control unit; An Ethernet power supply device, connected to the power supply selection unit and the DC voltage converter; A converter, wherein the input end of the converter is connected to the main control unit, the output end of the converter is connected to a local area network device through multiple interfaces, and the local area network device is connected to the output end of the Ethernet power supply device.

2. The optical network unit with Power over Ethernet according to claim 1, characterized in that: The power supply selection unit determines whether to support power supply to the Ethernet power supply device by using the optoelectronic composite port or the DC power supply port according to the incoming call mode.

3. The optical network unit with Power over Ethernet according to claim 1, characterized in that: Also includes: A bridge rectifier, wherein a first input end of the bridge rectifier is connected to a first output end of the photoelectric composite port, and a second input end of the bridge rectifier is connected to a second output end of the photoelectric composite port; A voltage stabilizer, wherein a first end of the voltage stabilizer is connected to a first output end of the photoelectric composite port, and a second end of the voltage stabilizer is connected to a second output end of the photoelectric composite port.

4. The optical network unit with Power over Ethernet according to claim 3, characterized in that: The power supply selection unit includes a power supply device interface controller, and the power supply device interface controller includes: a positive power input terminal connected to a first power supply voltage with the first output terminal of the bridge rectifier; A negative power input terminal connected to the second output terminal of the bridge rectifier; A first resistor is connected between the detection resistor input terminal and the positive power supply input terminal; A second resistor is connected between the classification detection terminal and the positive power input terminal; Indicates the open-drain output terminal, outputting the PG signal through the third resistor; Isolation terminal, connected to the ground terminal; A fourth resistor is connected between the grading resistor input terminal and the negative power supply input terminal; The adapter detection input terminal is connected to the ground terminal through a fifth resistor, and the adapter detection input terminal is also connected to a first end of a first voltage regulator diode through a sixth resistor, and a second end of the first voltage regulator diode is connected to the second power supply voltage.

5. The optical network unit with Power over Ethernet according to claim 4, characterized in that: A voltage converter is included, the voltage converter comprising: An input voltage terminal, connected to the first power supply voltage, the input voltage terminal is also connected to the second power supply voltage through a first diode, and the input voltage terminal is also connected to a ground terminal through a first capacitor; An enable terminal connected to the PG signal, the enable terminal is also connected to the input voltage terminal through a seventh resistor, and the enable terminal is also connected to a ground terminal through an eighth resistor; A soft start terminal connected to a ground port via a third capacitor, wherein the ground port is connected to the ground terminal; An output end, connected to a main system power supply port through a first inductor, the main system power supply port is connected to a ground terminal through a fourth capacitor, and the output end is connected to the ground terminal through a rectifier; A feedback voltage terminal is connected to the main system power supply port through a ninth resistor, the feedback voltage terminal is also connected to the ground terminal through a tenth resistor, and a fifth capacitor is connected in parallel to both ends of the ninth resistor; A switching frequency selection terminal connected to a ground terminal via an eleventh resistor; The bootstrap terminal is connected to the output terminal via a sixth capacitor.

6. The optical network unit with Power over Ethernet according to claim 4, characterized in that: A power interface is included, wherein a first end of the power interface is connected to a first end of a fuse, a second end of the power interface is connected to a third end, and is connected to a second end of the fuse via a surge protector; The second end of the fuse is connected to the power supply end of the Ethernet power supply device through the second diode, and the power supply end of the Ethernet power supply device is connected to the ground end through the seventh capacitor; the second end of the fuse is also connected to the second power supply voltage through the third diode, and a fourth diode is connected in parallel at both ends of the second diode; A twelfth resistor, wherein the first end of the twelfth resistor is connected to the second end of the fuse, the second end of the twelfth resistor is connected to the gate of an NMOS tube, the drain of the NMOS tube is connected to the ground terminal, and the source of the NMOS tube is connected to the second end of the surge protector.

7. The optical network unit with Power over Ethernet according to claim 6, characterized in that: The power interface is connected to an external DC power adapter.

8. The optical network unit with Power over Ethernet according to claim 6, characterized in that: An eighth capacitor is also connected between the source and the gate of the NMOS tube; A thirteenth resistor is also connected between the source and the gate of the NMOS tube, and is connected in parallel with the eighth capacitor; A second voltage stabilizing diode is also connected between the source and the gate of the NMOS tube and is connected in parallel with the eighth capacitor.

9. The optical network unit with Power over Ethernet according to claim 1, characterized in that: The power supply selection unit supports powering the Ethernet power supply device and the main system when the DC power supply port supplies power according to the incoming call mode.

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