TWI729551B - Uninterruptible power system and method using Ethernet for power supply - Google Patents

Abstract

An uninterruptible power system using Ethernet for power supply. It has a power supply device that can output a DC voltage to a powered device and an Ethernet switch via a network transmission line. It includes: a network packet switching controller, Contains: a central processing unit that controls the at least one set of DC voltage output of the power supply device, can also stop the DC voltage output of the power supply device, and start an initialization program of the power supply device; a non-volatile memory includes a firmware Physically, the firmware provides a reboot program for the CPU to execute, so that the power supply device can continuously output a DC voltage when the UPS is powered on by the Ethernet when it is rebooted. And provide a first parameter PersistentPoE and a second parameter PPoE_flag to set the power supply status of the Ethernet network.

Description

Uninterruptible power system and method using Ethernet for power supply

An uninterruptible power system, especially an uninterrupted power system and its method using Ethernet for power supply.

In today's market, it is common for Ethernet Switches to be equipped with Power over Ethernet (PoE) functions. PoE is an important power supply method. It is mainly used in places where there is an Ethernet line passing, especially where there is an Ethernet line passing but there is no power supply. PoE has a plug-and-play function, so users do not Need to find another power supply, which is convenient and cost-saving. The main function of PoE is: Power Sourcing Equipment (PSE) provides DC power to the powered device (PD) via the Ethernet line, and when the powered device (PD) receives the power from the power source via the Ethernet line When the power supply device (PSE) is a DC power source, a series of communication will be carried out between the two to ensure that the operation of PoE is safe and sound. The power supply device (PSE) is usually a set of circuits integrated in the Ethernet switch or an external device, and the powered device (PD) is usually: a security IP camera, a small wireless base station (Femtocell), VoIP Phone, Signage/Display, Lighting, Medical Equipment, Vehicle Infotainment, Point of Sales, Wireless Ethernet-connected equipment or devices such as RFID (Radio Frequency Identification, RFID).

With the increasing popularity of PoE, PoE-powered network surveillance cameras are installed in many unmanaged places and areas. These network surveillance cameras play an important role in monitoring, and all monitoring images need to be kept in one second. Recording and transmission, but in the actual environment, the network equipment that connects the network surveillance camera to transmit network packets and directly provides power to the network surveillance camera by means of PoE, such as: Ethernet switch, has Sometimes, the network device will not be able to transmit packets due to a crash. At this time, the network device is usually rebooted. During the reboot process, the network device will not be able to provide power to the network device by PoE for a period of time. The network monitoring camera causes the omission of the monitoring screen of the network monitoring camera, and there is a window of monitoring.

Generally, the reboot of the network device can be divided into "warm boot" and "cold boot". "Warm boot" is a method of rebooting without turning off the power of the network device, while "cold boot" involves shutting down. The power-on method of the network device.

In order to solve the above-mentioned problems, the present invention uses an uninterruptible power supply system and method using Ethernet for power supply, so that during the restarting process of the network equipment, the network equipment can still continue to provide power to the network equipment by means of PoE. The network surveillance camera prevents the network surveillance camera from being affected by the restart of the above-mentioned network equipment, continuously records the surveillance screen, and temporarily stores the surveillance screen image and/or sound recorded during this period on the network The monitoring camera will not send the stored monitoring screen to the network device until the network device is restarted, so that there will be no omissions in the monitoring screen of the network monitoring camera. In detail, the main technical means of an uninterruptible power system using Ethernet for power supply according to the present invention include: A power supply device capable of outputting at least one set of DC voltage to at least one powered device via at least one network transmission line, the power supply device further comprising a reset input terminal; An Ethernet switch, including: A network packet switching controller, including: A central processing unit electrically connected to the power supply device to control the at least one set of DC voltage output of the power supply device, and can also stop the DC voltage output of the power supply device and start the power supply by enabling the reset input terminal An initialization procedure of the device; A non-volatile memory, which contains a firmware, the firmware provides a reboot procedure for the CPU to execute, so that the power supply device when the UPS is powered on by the Ethernet is rebooted The at least one set of DC voltage can be continuously output. The network packet switching controller further includes: A physical layer transceiver includes: multiple output differential signal terminals and multiple input differential signal terminals. A plurality of isolated coil groups, each of which has a first side and a second side. On the first side, each isolated coil group is electrically connected to the plurality of output differential signal terminals and the plurality of input Among the differential signal terminals, its exclusive corresponding output differential signal terminal and input differential signal terminal; A plurality of identical and independent connectors, each of which is on the second side, is coupled and electrically connected to an isolated coil group dedicated to it and its dedicated output differential signal terminal and input differential signal terminal; wherein the multiple Each of the connectors can output a set of DC voltage to one of the at least one powered device via one of the at least one network transmission line as the power source of the powered device; Wherein the power supply device further includes: A digital power controller, electrically connected to the central processing unit, and receiving an instruction from the central processing unit, and outputting a control signal accordingly; An analog power controller includes a plurality of voltage output terminals, wherein each voltage output terminal is electrically connected to a corresponding isolation coil group on the second side, and at the same time, the analog power controller is electrically connected to the The digital power controller receives the control signal from the digital power controller and controls the voltage output state of the plurality of voltage output terminals accordingly. The voltage output state includes a normal output state and a stopped output state.

The present invention is an uninterrupted power system and method using Ethernet for power supply. The main technical means of the present invention further includes an uninterrupted power method using Ethernet for power supply, which includes the following contents.

Use an uninterrupted power system powered by Ethernet to provide DC power. The uninterrupted power system powered by Ethernet includes an Ethernet switch and a power supply device, as a first parameter PersistentPoE When enabled, the uninterrupted power system powered by Ethernet can provide at least DC power to at least one powered device connected to it, otherwise, the uninterrupted power system powered by Ethernet will stop providing The DC power supply, when a second parameter PPoE_flag is true, the uninterruptible power supply system powered by the Ethernet can continuously provide the at least DC power supply to the at least one powered device connected to it when it is restarted, Otherwise, the uninterruptible power system using Ethernet power supply stops providing the DC power when it is restarted. The method of uninterruptible power supply using Ethernet power supply further includes the following steps: S0: The uninterruptible power system powered by Ethernet receives a system restart signal; S1: If the system restart signal is a firmware update signal or a software reset command, skip to S8; if the system restart signal is a hardware reset signal, go to the next step; S2: Execute a system initialization program to restart the Ethernet switch; S3: If the first parameter PersistentPoE is not enabled, skip to S6, otherwise, go to the next step; S4: If the second parameter PPoE_flag is false, skip to S6, otherwise, go to the next step; S5: Set the second parameter PPoE_flag to false, store it in a firmware, and end the process; S6: Enable a reset input terminal of the power supply device to start a power supply device initialization procedure, and stop power supply to the connected at least one powered device; S7: After the power supply device executes the initialization program of the power supply device, the process ends; S8: If the first parameter PersistentPoE is not enabled, skip to S10, otherwise, go to the next step; S9: Set the second parameter PPoE_flag to true and store it in the firmware, skip to S2; S10: Set the second parameter PPoE_flag to false, store it in the firmware, and skip to S2.

Therefore, an uninterrupted power system using Ethernet power supply and the method of the present invention can enable the uninterrupted power system using Ethernet power supply to continuously supply DC voltage to connected powered devices when restarting. (PD), can achieve the purpose of the present invention.

Please refer to FIG. 1. In one embodiment, the uninterruptible power system 1 using Ethernet for power supply of the present invention is essentially an Ethernet switch and has the function of PoE, which can provide power to the connection. When the uninterruptible power system 1 powered by the Ethernet is rebooted, it can continue to supply power to the connected powered device (PD). The uninterruptible power system 1 powered by Ethernet has a network packet switching controller 2, a digital power controller 3, an analog power controller 4, a first isolation coil set 7, and a second isolation coil Group 8, a first connector 9 and a second connector 10. Both the first connector 9 and the second connector 10 have 8 external contacts, which can be connected to 4 pairs of transmission lines respectively. The network packet switching controller 2 includes: a central processing unit (CPU) 21, a media access control (MAC) 22, a physical layer transceiver (PHY) 23, and a non-volatile memory storage A firmware (Firmware) 24, wherein the physical layer transceiver 23 has first to fourth pairs of output differential signal terminals (TX1+, TX1-), (TX2+, TX2-), (TX3+, TX3-), ( TX4+, TX4-) and the first to fourth pairs of input differential signal terminals (RX1+, RX1-), (RX2+, RX2-), (RX3+, RX3-), (RX4+, RX4-), of which, the first to the fourth The two pairs of output differential signal terminals are spaced apart from the first to second pairs of input differential signal terminals and are coupled to the first connector 9 via a first isolation coil set 7, so that the 8 external contacts of the first connector 9 are from the left To the right correspond to the differential signal terminals TX1+, TX1-, RX1+, TX2+, TX2-, RX1-, RX2+, RX2- respectively; the third to fourth pairs of output differential signal terminals and the third to fourth pairs of input differential signals The terminals are arranged at intervals and are coupled to the second connector 10 via the second isolation coil set 8, so that the 8 contacts of the second connector 10 respectively correspond to the differential signal terminals TX3+, TX3-, R3X+, TX4+ from left to right. , TX4-, RX3-, RX4+, RX4-, where the first connector 9 and the second connector 10 are both RJ45 connectors for Ethernet, and the first connector 9 and the second connector 10 can respectively pass through an Ethernet The network transmission line of the network, such as the CAT5 Ethernet network transmission line, is connected to other network devices. The first isolation coil group 7 and the second isolation coil group 8 each have four identical and independent coupling coils, and each coupling coil includes two independent and coupled first-side inductance coils and a second side. Inductance coil, each coupling coil can bidirectionally electrically couple a pair of AC signals on the first and second side inductance coils to a pair of AC signals on the second and first side inductance coils. At the same time, each inductance The coils can conduct DC current independently and will not be short-circuited with other inductance coils.

The digital power controller 3 further has an I ² C interface 31 and an interrupt signal terminal 32, and is ^{electrically connected to the network packet switching controller 2 via the I 2} C interface 31 and the interrupt signal terminal 32. The above-mentioned digital power controller 3 is electrically connected to the analog power controller 4, and can control the DC voltage source output of the analog power controller 4. The analog power controller 4 is used to provide DC voltage to the 8 connections of the first connector 9. Point and the 8 contacts of the second connector 10. Among them, the digital power controller 3 is a mixed-mode circuit, used to communicate between the analog power controller 4 and the network packet switching controller 2, and at the same time digital power control The device 3 can completely isolate the analog high voltage of the analog power controller 4 to protect other circuits that use lower voltages in the uninterruptible power system 1 powered by the Ethernet network of the present invention, such as the network packet switching controller 2, etc. . The analog power controller 4 has first to sixth voltage output terminals 41 to 46, wherein the first and third voltage output terminals 41, 43 are respectively electrically connected and output a DC low voltage V- to correspond to (TX1+, TX1-), (RX2+, RX2-) of the two coupled induction coils in the first isolation coil group 7, the fourth and sixth voltage output terminals 44, 46 are respectively electrically connected and output a DC low voltage V- to the corresponding (TX3+, TX3- ), (RX4+, RX4-) two coupled induction coils in the second isolation coil group 8, the second voltage output terminal 42 is electrically connected at the same time and outputs a high DC voltage V+ to correspond to (RX1+, RX1-), ( The two coupled induction coils in the first isolation coil group 7 of TX2+, TX2-), the fifth voltage output terminal 45 is electrically connected at the same time and outputs the DC high voltage V+ to correspond to (RX3+, RX3-), (TX4+, TX4 -) Two coupled induction coils in the second isolation coil group 8.

Please refer to Figures 1 and 2, so the first voltage output terminal 41 outputs the DC low voltage V- to a pair of transmission lines corresponding to the first pair of output differential signal terminals (TX1+, TX1-) to provide the DC low voltage V- to the first network surveillance camera (PD1) connected to the first connector 9, and the remaining second to third voltage output terminals 42~43 respectively output their DC voltages to the transmission lines of the corresponding differential signal terminals, To provide a DC voltage source to the first network surveillance camera (PD1) connected to the first connector 9. Similarly, the remaining fourth to sixth voltage output terminals 44~46 output their DC voltages to the corresponding The transmission line of the differential signal end provides a DC voltage source to the second network surveillance camera (PD2) connected to the second connector 10. It can be seen from the above that the combination of the digital power controller 3 and the analog power controller 4 is the above-mentioned power supply device (PSE), and the first and second network surveillance cameras (PD1) connected to the first connector 9 and the second connector 10 , PD2) is the above-mentioned powered device (PD).

The reboot of a general network device can be divided into "warm boot" and "cold boot". A "warm boot" is a method of rebooting without turning off the power of the network device, and a "cold boot" involves turning off the device. The power-on method of network equipment. In this embodiment, the uninterruptible power supply system 1 using Ethernet power supply of the present invention provides the power supply device (PSE), and the uninterruptible power supply method using Ethernet power supply of the present invention provides an In the case of "boot", the PoE power supply is realized without interruption, as detailed below.

The present invention uses the uninterrupted power method of Ethernet power supply to provide a first parameter PersistentPoE and a second parameter PPoE_flag to set the state of PoE power supply. When the first parameter PersistentPoE is enabled/disabled, Its value is 1/0. When the second parameter PPoE_flag is true/false, its value is 1/0. The second parameter PPoE_flag is stored in the firmware 24, where the firmware ( The Firmware 24 may be a flash memory (FLASH Memory). When the first parameter PersistentPoE is enabled, the power supply device (PSE) can provide DC power to the powered device (PD) connected to the uninterruptible power system 1 powered by Ethernet, otherwise, the The power supply device (PSE) stops providing the DC power. When a second parameter PPoE_flag is true, the uninterruptible power system 1 powered by the Ethernet will continue to provide DC power to the Ethernet when it is restarted. The powered device (PD) connected to the uninterrupted power system 1 powered by the network, otherwise, the uninterrupted power system 1 powered by the Ethernet will stop supplying the DC power when it is restarted. In addition, the digital power controller 3 in the power supply device (PSE) also has a reset (RESET) input terminal 33, when the reset (RESET) input terminal 33 is enabled, the digital power controller 3 will be turned off All outputs of the analog power controller 4, at this time, the PoE power supply of the uninterruptible power system 1 powered by the Ethernet network will be turned off to stop the power supply to the connected powered device (PD). The restart of the uninterruptible power system 1 powered by Ethernet can be divided into two parts, namely the Ethernet switch (that is, the uninterrupted power system 1 powered by Ethernet subtracts the power supply device ( PSE)) and the power supply device (PSE). In the uninterruptible power supply method of the present invention, a system initialization program 81 and a power supply device (PSE) initialization program 82 respectively correspond to The restart of the Ethernet switch and the restart of the power supply unit (PSE).

When the uninterruptible power system 1 powered by Ethernet receives a system restart signal 61, it will first determine whether the system restart signal 61 belongs to a hardware reset signal 62 or a firmware update signal 63 Or a software reset command 64. When the system restart signal 61 is the hardware reset signal 62, the uninterruptible power system 1 powered by Ethernet will first execute the system initialization program 81 to restart the Ethernet switch. And concurrently, the uninterruptible power system 1 powered by Ethernet will confirm whether the first parameter PersistentPoE is enabled, if the first parameter PersistentPoE is enabled and the second parameter PPoE_flag is true Then, set the second parameter PPoE_flag to false (PPoE_flag=0) and store it in the firmware 24.

In addition, if the first parameter PersistentPoE is not enabled, or the first parameter PersistentPoE is enabled but the second parameter PPoE_flag is false, the uninterruptible power system 1 powered by Ethernet will cause The reset (RESET) input 33 of the digital power controller 3, at this time, the PoE power supply of the uninterruptible power system 1 powered by Ethernet will be turned off to stop the power supply to the connected powered device (PD), at the same time, the power supply device (PSE) initialization program 82 is also started to initialize the digital power supply controller 3 and the analog power supply controller 4 (ie, the power supply device (PSE)).

In addition, when the system restart signal 61 is the firmware update signal 63 or the software reset command 64, the uninterruptible power system 1 powered by Ethernet will first confirm whether the first parameter PersistentPoE is enabled If the first parameter PersistentPoE is enabled, set the second parameter PPoE_flag to true (PPoE_flag=1), otherwise, set the second parameter PPoE_flag to false (PPoE_flag=0), and then execute the system initialization procedure described above 81 And subsequent actions.

Please refer to FIG. 3, after sorting the above methods, the uninterrupted power method flow of the present invention using Ethernet power supply can be obtained, which includes the following steps: Step 0 (S0): The uninterruptible power system 1 powered by Ethernet receives a system restart signal 61. Step 1 (S1): If the system restart signal 61 belongs to the firmware update signal 63 or the software reset command 64, skip to step 8 (S8); if the system restart signal 61 belongs to the hardware reset Signal 62, go to the next step. Step 2 (S2): execute the system initialization program 81 to restart the Ethernet switch. Step 3 (S3): If the first parameter PersistentPoE is not enabled, skip to step 6 (S6), otherwise, go to the next step. Step 4 (S4): If the second parameter PPoE_flag is false, skip to step 6 (S6), otherwise, go to the next step. Step 5 (S5): Set the second parameter PPoE_flag to false (PPoE_flag=0), and store it in the firmware 24, then end the process. Step 6 (S6): Enable the reset (RESET) input 33 of the digital power controller 3 to start the power supply device (PSE) initialization program 82, and stop power supply to the connected powered device (PD) . Step 7 (S7): After the power supply device (PSE) executes the power supply device initialization program 82, the process ends. Step 8 (S8): If the first parameter PersistentPoE is not enabled, skip to step 10 (S10), otherwise, go to the next step. Step 9 (S9): Set the second parameter PPoE_flag to true (PPoE_flag=1), and store it in the firmware 24, skip to step 2 (S2). Step 10 (S10): Set the second parameter PPoE_flag to false (PPoE_flag=0), and store it in the firmware 24, skip to step 2 (S2).

In summary, the uninterruptible power supply method for Ethernet power supply of the present invention can be used in the uninterruptible power supply system that uses Ethernet power under the condition of the firmware update or the "warm boot" of the software reset. When starting up, the PoE power supply can be realized without interruption, so the invention objective of the present invention can be achieved.

1…Uninterruptible power system powered by Ethernet 2…Network packet switching controller 3…Digital power controller 4…Analog power controller 5…Interface circuit 6…State setting switch group 7…First isolation coil group 8...Second isolation coil set 9~10...First and second connectors 21...Cpu 22...Media access control 23...Physical layer transceiver 24...Firmware 31, 51...I ² C interface 32 , 52...Interrupt signal terminal 33...Reset input terminal 41~46...First to sixth voltage output terminal 61...System restart signal 62...Hardware reset signal 63...Firmware update signal 64...Software reset command 81... System initialization program 82... Power supply device (PSE) initialization program I ² C... A serial communication bus (Inter-Integrated Circuit) PD1, PD2... The first and second network surveillance cameras PSE... The power supply device PD... Device RJ45...a universal connector CAT5 for Ethernet...a network transmission line for Ethernet TX1+, TX1-...the first pair of output differential signal terminals TX2+, TX2-...the second pair of output differential signal terminals TX3+, TX3- …The third pair of output differential signal terminals TX4+, TX4-…The fourth pair of output differential signal terminals RX1+, RX1-…The first pair of input differential signal terminals RX2+, RX2-…The second pair of input differential signal terminals RX3+, RX3-... Three pairs of input differential signal terminals RX4+, RX4-…The fourth pair of input differential signal terminals V+, V-…DC high and low voltage

Fig. 1 is a main circuit diagram of an uninterruptible power system using Ethernet for power supply according to the present invention. Figure 2 is a circuit diagram of an uninterruptible power system using Ethernet for power supply and a network surveillance camera connected to the present invention. FIG. 3 is a flowchart of an embodiment of an uninterruptible power supply method using Ethernet for power supply according to the present invention.

24... Firmware 33...Reset input 61...System restart signal 62...Hardware reset signal 63... Firmware update signal 64...software reset command 81...System initialization program 82... Power supply unit (PSE) initialization program PSE...power supply unit

Claims (7)

An uninterrupted power system using Ethernet for power supply, comprising: a power supply device capable of outputting at least one set of DC voltage to at least one powered device via at least one network transmission line, the power supply device including a reset input terminal; The Ethernet switch includes: a network packet switching controller, including: a central processing unit electrically connected to the power supply device to control the at least one set of DC voltage output of the power supply device, and the power supply device can be enabled The reset input terminal of the power supply device stops the DC voltage output of the power supply device and starts an initialization procedure of the power supply device; a non-volatile memory, which contains a firmware, and the firmware provides a restart procedure for the The central processing unit executes, so that the power supply device can continuously output the at least one set of DC voltage when the uninterruptible power system using Ethernet power supply is restarted. The uninterruptible power system using Ethernet power supply as described in claim 1, wherein the network packet switching controller further includes: a physical layer transceiver including: a plurality of output differential signal terminals; a plurality of input differentials Signal terminal. The uninterruptible power supply system using Ethernet power supply as described in claim 2, further comprising: a plurality of isolated coil groups, wherein each isolated coil group has a first side and a second side, and the first side On the other hand, each isolated coil group is electrically connected to the multiple output differential signal terminals, the output differential signal terminal and the input differential signal terminal of the multiple input differential signal terminals, respectively; multiple identical and independent connectors, wherein Each connector is on the second side, coupled and electrically connected to its exclusive corresponding isolation coil group and its exclusive corresponding output differential signal terminal and input differential signal terminal. The uninterruptible power system using Ethernet power supply as described in claim 3, wherein the power supply device further comprises: a digital power controller electrically connected to the central processing unit and receiving a command from the central processing unit , And output a control signal accordingly; an analog power controller includes a plurality of voltage output terminals, wherein each voltage output terminal is electrically connected to its corresponding isolation coil group on the second side, and at the same time, The analog power controller is electrically connected to the digital power controller, and receives the control signal from the digital power controller, and accordingly controls the voltage output state of the plurality of voltage output terminals. The voltage output state includes a normal output state and One stop output state. The uninterruptible power system using Ethernet power supply as described in claim 3, wherein each of the multiple connectors can output a set of DC voltage to the at least one network transmission line through one of the at least one network transmission line One of the powered devices serves as the power source of the powered device. An uninterrupted power method using Ethernet for power supply uses an uninterrupted power system powered by Ethernet to provide DC power. The uninterrupted power system powered by Ethernet includes an Ethernet network The switch and a power supply device. When a first parameter PersistentPoE is enabled, the uninterruptible power system powered by Ethernet can provide at least DC power to at least one powered device connected to it. Otherwise, the The uninterrupted power system powered by Ethernet stops providing the DC power. When a second parameter PPoE_flag is true, the uninterrupted power system powered by Ethernet can continue to provide the at least DC power when restarting The power is supplied to the at least one powered device connected to it. Otherwise, the uninterrupted power system using Ethernet power supply stops providing the DC power when it is restarted. The method of using the uninterruptible power supply using Ethernet power It further includes the following steps: S0: the uninterruptible power system powered by Ethernet receives a system restart signal; S1: if the system restart signal is a firmware update signal or a software reset command, skip to S8 ; If the system restart signal is a hardware reset signal, go to the next step; S2: Execute a system initialization procedure to restart the Ethernet switch; S3: If the first parameter PersistentPoE is not enabled, skip to S6, otherwise, go to the next step; S4: If the second parameter is PersistentPoE If the parameter PPoE_flag is false, skip to S6, otherwise, go to the next step; S5: set the second parameter PPoE_flag to false, and store it in a firmware to end the process; S6: enable a reset of the power device Input terminal to start a power device initialization program and stop power supply to the connected at least one powered device; S7: the power device executes the power device initialization program, and ends the process; S8: if the first parameter PersistentPoE is not If enabled, skip to S10, otherwise, go to the next step; S9: Set the second parameter PPoE_flag to true and store it in the firmware, skip to S2; S10: Set the second parameter PPoE_flag to False, and store it in the firmware, skip to S2. A network monitoring camera that provides power through an uninterrupted power system powered by Ethernet as in claim 1. When the uninterrupted power system powered by Ethernet is restarted, the Ethernet network should be used The uninterrupted power system of the power supply can continuously supply power to the network surveillance camera, so that the network surveillance camera can continuously record the monitoring picture or the monitoring picture and sound, and the monitoring picture recorded during the restart period Or images and sounds are temporarily stored in the network surveillance camera until the uninterruptible power system powered by Ethernet is restarted, and then the stored surveillance screen images or images and sounds are sent to the user Uninterruptible power system powered by Ethernet.

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