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Method, device and system for realizing power over Ethernet (POE)

An implementation method, Ethernet technology, applied in the implementation field of Power over Ethernet POE, can solve the problems of reducing the stability of the system operation, failing to realize redundant backup and load balancing, affecting the normal operation of powered equipment, etc., to improve stability Effect

Active Publication Date: 2009-12-02
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing POE power supply implementation scheme, single-port power supply cannot realize the functions of load balancing and redundant backup; even if dual-port power supply is adopted, since the two ports cannot realize current-balanced power supply, the functions of redundant backup and load balancing cannot be realized
When the power supply port fails, the function of redundant backup and load balancing cannot be realized, and the power supply will be interrupted, which will affect the normal operation of the powered equipment and reduce the stability of the system operation

Method used

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  • Method, device and system for realizing power over Ethernet (POE)
  • Method, device and system for realizing power over Ethernet (POE)
  • Method, device and system for realizing power over Ethernet (POE)

Examples

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Embodiment 1

[0037] In the first application embodiment, the dual-port power supply is taken as an example to describe the POE implementation solution provided by the embodiment of the present invention in detail. image 3 The schematic diagram of the circuit structure for implementing Embodiment 1 of the present invention is shown, wherein, the PSE side uses two RJ45 interfaces to supply power, and the powered equipment side uses two RJ45 interfaces to receive the DC power from the PSE side. When the data line pair is used for power supply, on the PD side, the circuit corresponding to each interface needs to be equipped with a transformer that supports POE ( image 3 not shown in ); when the idle line pair is used for power supply, there is no need to set a transformer on the PD side. Therefore, in the specific circuit structure, in order to support two power supply modes, each interface is connected to its corresponding PD control through a diode bridge. and a DC-DC converter, each DC-DC...

Embodiment 2

[0046] In the second application embodiment, the dual-port power supply is taken as an example to describe the POE implementation solution provided by the embodiment of the present invention in detail. Figure 5 The schematic diagram of the circuit structure for realizing the second embodiment of the present invention is shown, wherein, the PSE side uses two RJ45 interfaces to supply power, and the powered equipment side uses two RJ45 interfaces to receive the DC power on the PSE side, and are respectively connected to their respective corresponding terminals through diode bridges. PD controller and load balancing controller, PD controller is connected to DC-DC converter through MOSFET or Darlington tube or power transistor. Wherein, the control output terminal of the load balance controller controls the MOSFET or Darlington tube or the power triode to work in the linear range through the linear adjustment circuit, which is used to compensate the current difference caused by th...

Embodiment 3

[0055] There are many ways to realize the load balancing controller. The application embodiment of the present invention takes the load sharing controller chip, such as UC3907, as an example, and introduces in detail the way to realize load balancing through the load sharing controller chip:

[0056] The load sharing controller chip is composed of high input impedance voltage amplifier, ground amplifier, differential current amplifier and adjustment amplifier. Wherein, the impedance voltage amplifier is a buffer with constant gain, and provides a +0.25V offset to complete the detection of the negative Sense (voltage detection negative terminal), and the output result of the ground amplifier is added with an approximately 1.75V The offset forms the bandgap reference voltage.

[0057] The circuit connection relationship and working process of the load sharing controller chip are as follows:

[0058] The negative input terminal of the adjustment amplifier is connected to the dif...

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Abstract

The invention discloses a method for realizing power over Ethernet (POE), which comprises the steps of: receiving direct current power supplies provided by power supply equipment (PSE) through at least two ports at a PD side of power receiving equipment; performing load balancing processing on a plurality of the direct current power supplies which enter from the at least two ports; and outputting the direct current power supplies which are subjected to load balancing processing to loads. The embodiment of the invention also provides a POE control device and a POE system. The direct current power supplies are received through multiple ports at a power receiving equipment side; and a plurality of the direct current power supplies are subjected to load balancing processing, so that the functions of load balancing and redundancy backup of the POE are realized, and the stability of system operation is improved.

Description

technical field [0001] Embodiments of the present invention relate to the field of network communication technologies, and in particular, to a method, device and system for implementing Power over Ethernet (POE). Background technique [0002] POE (Power Over Ethernet) is a technology that transmits DC power to powered devices through Ethernet cables while transmitting data using standard Ethernet cables. Two POE power supply methods are currently defined: one is to transmit power through (1, 2,; 3, 6) data line pairs, and the other is to transmit power through (4, 5; 7, 8) idle line pairs The way. [0003] POE technology is developing towards high power. In order to meet the power demand of high-power equipment, there is a dual-port POE power supply implementation scheme. Such as figure 1 As shown, in this technical solution, adapter circuit (Adapter Circuitry) 12 receives power from two ports (Port) of 18,20 of PSE (Power Supply Equipment, power supply equipment) 11 thro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/10H02J1/00
Inventor 成灵安潘厚源饶俊阳张晋博
Owner HUAWEI TECH CO LTD
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