CN108964927B

CN108964927B - Power over Ethernet (PoE) self-adaption method and device

Info

Publication number: CN108964927B
Application number: CN201810586261.4A
Authority: CN
Inventors: 汲哲; 宁保涛
Original assignee: Hangzhou H3C Technologies Co Ltd
Current assignee: Hangzhou H3C Technologies Co Ltd
Priority date: 2018-06-08
Filing date: 2018-06-08
Publication date: 2021-04-27
Anticipated expiration: 2038-06-08
Also published as: CN108964927A; WO2019233409A1

Abstract

The application provides a power over Ethernet (PoE) self-adaptive method and a device. In the application, the PSE does not directly supply power to the in-place PD, but the PSE controller adaptively selects a matched matching voltage for the in-place PD from different voltages output by the voltage output module according to the detected PD information, and then supplies power to the in-place PD according to the selected matching voltage, so that the PSE controller adaptively selects a matched matching voltage for the in-place PD to supply power according to different voltages output by the voltage output module according to the detected PD information regardless of whether the in-place PD is a standard PD or a non-standard PD, the purpose of supplying power to the standard PD and the non-standard PD in an adaptive manner is achieved, and the purpose of mixing the standard PD and the non-standard PD is also achieved.

Description

Power over Ethernet (PoE) self-adaption method and device

Technical Field

The present application relates to internet of things, and in particular, to a Power over Ethernet (PoE) adaptive method and apparatus.

Background

POE, called Power Over LAN (POL) or Active Ethernet (Active Ethernet), sometimes referred to as Ethernet Power over, is a technology that can provide dc Power for some IP-based terminals (such as IP phones, wireless LAN access points AP, network cameras, etc.) while transmitting data signals for such devices without any modification of the existing Ethernet cat.5 wiring infrastructure.

In a PoE system, there are two important components, one of which is called Power Sourcing Equipment (PSE) for providing Power and the other of which is called Powered Device (PD) for consuming Power.

At present, the PoE system only supports standard PDs, and the standard PDs in place can be directly supplied with standard voltage for power supply. The standard PD herein is a PD conforming to the 802.3af, 802.3at, UPOE standard, etc. Non-standard quasi-PDs are PDs that do not conform to the 802.3af, 802.3at, UPOE standard, etc. The main difference between the standard PD and the non-standard PD is that the supply voltage is different and the characteristic impedance is different. The PSE provides a standard voltage for a standard PD. The standard voltage refers to a voltage conforming to a standard such as 48 volts (V) or the like.

In an actual networking, there is often a requirement for sharing a standard PD and a non-standard PD, and based on this, it is a technical problem to be solved at present to adaptively implement PoE to meet the requirement for sharing the standard PD and the non-standard PD.

Disclosure of Invention

The application provides a power over Ethernet (PoE) self-adaptive method and a device, which are used for realizing power supply for a standard PD and a non-standard PD in a self-adaptive manner.

The technical scheme provided by the application comprises the following steps:

a power over Ethernet (PoE) self-adaptive device is applied to Power Supply Equipment (PSE), and comprises:

the voltage output module is used for outputting at least two different voltages;

the PSE detection circuit is used for detecting PD information of the on-site powered device PD;

and the PSE controller is used for selecting a matching voltage matched with the on-site PD from various different voltages output by the voltage output module according to the PD information detected by the PSE detection circuit, and controlling the matching voltage to be input to the on-site PD so as to supply power to the on-site PD.

A power over Ethernet (PoE) self-adaptive method is applied to Power Supply Equipment (PSE) and comprises the following steps:

detecting PD information of an on-position powered device PD;

selecting a matching voltage matched with the in-place PD from different voltages output by the PSE according to the detected PD information;

controlling the matching voltage input to the on-bit PD to power the on-bit PD.

According to the technical scheme, the PSE does not directly supply power to the on-site PD, the PSE controller adaptively selects a matched matching voltage for the on-site PD according to different voltages output by the voltage output module according to detected PD information, and then supplies power to the on-site PD according to the selected matching voltage, so that the PSE controller adaptively selects a matched matching voltage for the on-site PD according to different voltages output by the voltage output module according to the detected PD information to supply power to the standard PD and the non-standard PD, the purpose of adaptively supplying power to the standard PD and the non-standard PD is achieved, and the purpose of mixing the standard PD and the non-standard PD is also achieved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a block diagram of an embodiment of a PoE adaptive device provided in the present application;

FIG. 2 is a block diagram of an exemplary device provided herein;

fig. 3 is a flow chart of a method provided by the present application.

Detailed Description

For the purposes of promoting an understanding of the present application, reference will now be made to the following descriptions taken in conjunction with the accompanying drawings and examples:

referring to fig. 1, fig. 1 is a block diagram of an embodiment of a PoE adaptive device provided by the present application. As one embodiment, the apparatus provided herein is applied to a PSE.

As shown in fig. 1, the apparatus may include: a voltage output module 101, a PSE detection circuit 102, and a PSE controller 103.

In the present application, the voltage output module 101 can output at least two different voltages at the same time. As an embodiment, the voltage output by the voltage output module 101 at least includes: standard supply voltage, non-standard supply voltage. The standard supply voltage here is a voltage that conforms to a standard such as the 802.3af, 802.3at, UPOE standard, etc. Correspondingly, the non-standard supply voltage here is a voltage that does not comply with standards such as 802.3af, 802.3at, UPOE standards, etc.

A PSE detection circuit 102 configured to detect PD information of a PD in place;

the PSE controller 103 is configured to select a matching voltage matched with the in-place PD from different voltages output by the voltage output module 101 according to the detected PD information, control the matching voltage to be input to the in-place PD to supply power to the in-place PD, and finally control a path of voltage to be input to the in-place PD at the same time to supply power to the in-place PD.

Thus, the description of the structure of the apparatus shown in fig. 1 is completed.

As can be seen from the apparatus shown in fig. 1, in the present application, the PSE does not directly supply power to the incumbent PD, but the PSE controller 103 adaptively selects a matching voltage for the incumbent PD from different voltages output by the voltage output module 101 according to the detected PD information, and then supplies power to the incumbent PD according to the selected matching voltage, so that regardless of whether the incumbent PD is a standard PD or a non-standard PD, the PSE controller 104 adaptively selects a matching voltage for the incumbent PD from different voltages output by the voltage output module 101 according to the detected PD information to supply power, and the purpose of adaptively supplying power to the standard PD and the non-standard PD and the purpose of mixing the standard PD and the non-standard PD are also achieved.

In the present application, the voltages output by the voltage output module 101 include: the PSE power supply system comprises a standard power supply voltage supported by the PSE and a non-standard power supply voltage supported by the PSE, wherein impedance intervals corresponding to the standard power supply voltage and the non-standard power supply voltage are different. The following is specifically described:

as an embodiment, the present application may configure the impedance interval supported by the PSE in advance in the PSE according to requirements. Wherein, the impedance interval supported by the PSE may include: standard impedance interval, non-standard impedance interval. Here, the standard impedance interval is set according to the impedance of the standard PD. Taking the dc voltage with the standard voltage of 48V as an example, the input dc impedance tested by the PD ethernet port is 23.75 kohms to 26.25 kohms, and the standard impedance interval can be set to 23.75 kohms to 26.25 kohms. Here, the non-standard impedance interval is set according to the impedance of the non-standard PD. Taking the dc voltage with 24V as an example, the input dc impedance measured from the PD ethernet port is between 8 kilohms and 12 kilohms, and the non-standard impedance interval can be set to be between 8 kilohms and 12 kilohms.

In the present application, the adapted voltage is also configured for the PSE configured impedance interval. Taking the standard impedance interval of 23.75 kilo-ohms to 26.25 kilo-ohms as an example, the standard impedance interval of 23.75 kilo-ohms to 26.25 kilo-ohms can be configured with a direct current voltage with the adaptive voltage of 48V; and taking the non-standard impedance interval as an example of 8 kilo-ohms to 12 kilo-ohms, the adaptive direct-current voltage with the voltage of 24V can be configured for the non-standard impedance interval of 8 kilo-ohms to 12 kilo-ohms.

Based on the above configuration, the PD information detected by the PSE detection circuit 102 may be the impedance of the PD in place in this application as an example.

The selecting, by the PSE controller 103 according to the PD information detected by the PSE detection circuit 102, one matching voltage matching the in-place PD from the different voltages output by the voltage output module 101 may specifically include:

searching an impedance interval where the impedance of the bit PD is located from various impedance intervals supported by the PSE;

selecting a voltage corresponding to an impedance section where the impedance of the bit PD is located from the voltages output by the voltage output module 101;

and determining a voltage corresponding to an impedance interval where the impedance of the bit PD is located as a matching voltage matched with the bit PD.

Thus, the PSE controller 103 can select a matching voltage matched with the in-place PD from different voltages output by the voltage output module 101 according to the PD information detected by the PSE detection circuit 102.

It should be noted that, in the present application, based on the time sequence curve of the at-site PD, it can be known that the selection of a matching voltage matched with the at-site PD by the PSE controller 103 from the different voltages output by the voltage output module 101 according to the PD information detected by the PSE detection circuit 102 is performed at a fixed time, such as 500 ms.

And once the PSE controller 103 has not successfully selected a matching voltage matching the on-bit PD from the various voltages output from the voltage output module 101 according to the detected PD information at the end of the specified time, the PSE controller 103 is further configured to control the PSE detection circuit to stop performing classification detection and power-up on the on-bit PD. The hierarchical detection and power-up are similar to the prior art and are not described in detail.

Here, if the PSE controller 103 has not successfully selected a matching voltage matching the bit PD from among the different voltages output from the voltage output module 101 according to the detected PD information at the end of the specified time, the PSE controller may be caused by the fact that the impedance of the bit PD is not within any impedance section supported by the PSE. The present application is not particularly limited and will not be described herein.

In order to facilitate the PSE controller to control the voltage, in the present application, as an embodiment, a switch may be respectively set for each voltage output by the voltage output module 101, and the PSE controller achieves the purpose of controlling the voltage by indirectly controlling the switch.

Based on this, as shown in fig. 1, the apparatus may further include: a switch 104.

Here, the switch 104 may include N switches, where N is the number of voltages output by the voltage output module 101. In the present application, each of the different voltages output by the voltage output module 101 is respectively passed through a corresponding switch.

Each of the switches 104 is used to control the on/off of the voltage passing therethrough. As an embodiment, the switch is a MOS transistor or other device having a switching function.

Based on this, the above PSE controller 103 specifically configured to control the matching voltage input to the on-bit PD may include:

PSE controller 103 enables the switch through which the match voltage is passed so that the switch through which the match voltage is passed allows the match voltage to pass through and be input to the incumbent PD. It is finally achieved that the PSE controller 103 controls the matching voltage input to the on-bit PD.

The present application is described below by way of a specific example:

referring to fig. 2, fig. 2 is a block diagram of an exemplary apparatus provided in the present application. As shown in fig. 2, the voltage output module 201 outputs the standard voltage 48V and the non-standard voltage 24V, respectively. As an embodiment, the 24V may be a voltage required by the internet of things equipment in the internet of things which is rapidly developed at present. It should be noted that the standard voltage 48V and the non-standard voltage 24V are only an example and are not limiting.

In fig. 2, the standard voltage 48V and the non-standard voltage 24V output by the voltage output module 201 are respectively passed through corresponding switches. The switch shown in fig. 2 is a MOS transistor as an example. If the switch corresponding to the standard voltage 48V outputted by the voltage output module 201 is denoted as the switch 202a, the switch corresponding to the non-standard voltage 24V is denoted as the switch 202 b.

In fig. 2, as an embodiment, the PSE detection circuit 203 detects that the impedance of the bit PD is 24.9 kilo-ohms, and the PSE controller 204 checks that the impedance of the bit PD 24.9 kilo-ohms is just in the standard impedance interval 23.75 kilo-ohms to 26.25 kilo-ohms supported by the PSE, and the PSE controller 204 obtains the voltage corresponding to the standard impedance interval 23.75 kilo-ohms to 26.25 kilo-ohms. Here, the standard impedance range 23.75 kilo-ohms to 26.25 kilo-ohms obtained by the PSE controller 204 corresponds to a voltage of 48V.

PSE controller 204 controls switch 202a to allow a 48V input to the on-bit PD. So far, the supply voltage provided for the on-site PD is 48V, and the nonstandard voltage 24V output by the voltage output module 201 is not allowed to supply power for the on-site PD, and only one voltage can be selected to supply power for the on-site PD at the same time.

In fig. 2, as another embodiment, the PSE detection circuit 203 detects that the impedance of the bit PD is 10 kilo-ohms, the PSE controller 204 checks that the impedance 10 kilo-ohms of the bit PD is just in the non-standard impedance range supported by the PSE, which is 8 kilo-ohms to 12 kilo-ohms, and the PSE controller 204 obtains the voltage corresponding to the non-standard impedance range which is 8 kilo-ohms to 12 kilo-ohms. Here, the voltage corresponding to the nonstandard impedance range of 8 kilo-ohms to 12 kilo-ohms acquired by the PSE controller 204 is 24V.

PSE controller 204 controls switch 202b to allow a 24V input to the on-bit PD. So far, the supply voltage provided for the on-site PD is 24V, and the standard voltage 48V output by the voltage output module 201 is not allowed to supply power for the on-site PD, and only one voltage can be selected to supply power for the on-site PD at the same time.

In fig. 2, as another embodiment, the PSE detection circuit 203 detects that the impedance of the bit PD is 20 kilo-ohms, then the PSE controller 204 checks that the impedance of the bit PD is 20 kilo-ohms and is not in any impedance section (including a standard impedance section and a non-standard impedance section) supported by the PSE, then the PSE controller 204 controls the PSE detection circuit 203 to stop performing classification detection and power-on the bit PD, where the classification detection and power-on are similar to the prior art and are not described again.

Thus, the description of the embodiments is completed.

Corresponding to the device, the application also provides a flow chart of the PoE self-adaptive method. Referring to fig. 3, fig. 3 is a flow chart of a method provided by the present application. The method is applied to PSE. As shown in fig. 3, the process may include the following steps:

in step 301, PD information of the bit PD is detected.

In step 302, a matching voltage matching the PD in place is selected from the different voltages output by the PSE according to the detected PD information.

As an embodiment, the PD information is an impedance at the bit PD.

Based on this, in step 302, selecting a matching voltage matching the PD in place from the different voltages output by the PSE according to the detected PD information may include:

searching an impedance interval where the impedance of the bit PD is located from each impedance interval supported by the PSE;

selecting a voltage corresponding to an impedance section where the impedance of the bit PD is located from all voltages output by the PSE;

It should be noted that, in the present application, the respective voltages output by the PSE may include: the PSE comprises a standard power supply voltage supported by the PSE and a non-standard power supply voltage supported by the PSE, wherein impedance intervals corresponding to the standard power supply voltage and the non-standard power supply voltage are different.

Step 303, controlling the matching voltage to be input to the on-site PD to supply power to the on-site PD.

As an embodiment, here, a control matching voltage is input to the bit PD:

enabling the switch through which the matching voltage passes to control the switch through which the matching voltage passes to allow the matching voltage to pass and input to the on-bit PD.

The flow shown in fig. 3 is completed.

As can be seen from the flow shown in fig. 3, in the present application, the PSE does not directly supply power to the in-place PD, but first adaptively selects a matching voltage for the in-place PD from different voltages output by the PSE according to the detected PD information, and then supplies power to the in-place PD according to the selected matching voltage, so that regardless of whether the in-place PD is a standard PD or a non-standard PD, the PSE can adaptively select a matching voltage for the in-place PD from different voltages output according to the detected PD information to supply power, which achieves the purpose of adaptively supplying power to the standard PD and the non-standard PD, and also achieves the purpose of mixing the standard PD and the non-standard PD.

It should be noted that, in the present application, the step 302 is performed within a specified time, such as 500ms, to select a matching voltage matching the bit PD from the different voltages output by the PSE according to the detected PD information;

if it is not successful to select a matching voltage matching the present PD from the different voltages output by the PSE according to the detected PD information when the specified time is over, for example, 500ms, the present application may further include:

control stops performing classification detection and power-up on the in-place PD. Here, the hierarchical detection and power-up are similar to the existing manner and are not described in detail.

Thus, the description of the method provided in the present application is completed.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A power over Ethernet (PoE) self-adaptive device is applied to Power Sourcing Equipment (PSE), and comprises the following components:

the voltage output module is used for outputting at least two different voltages; the voltages output by the voltage output module comprise: a standard supply voltage supported by the PSE, a non-standard supply voltage supported by the PSE;

the PSE controller is used for selecting a matching voltage matched with an on-site PD from different voltages output by the voltage output module according to the PD information detected by the PSE detection circuit within a specified time, and controlling the matching voltage to be input to the on-site PD to supply power to the on-site PD; and if the selection of a matching voltage matched with the on-site PD from the different voltages output by the voltage output module according to the detected PD information is not successful at the end of the specified time, controlling the PSE detection circuit to stop performing classification detection and power-on the on-site PD.

2. The apparatus of claim 1, wherein the PD information is an impedance of the PD in place;

the PSE controller selects a matching voltage matched with the in-place PD from different voltages output by the voltage output module according to the PD information detected by the PSE detection circuit, and the matching voltage comprises:

selecting a voltage corresponding to an impedance section where the impedance of the bit PD is located from the voltages output by the voltage output module;

3. The apparatus of claim 2, wherein the impedance intervals corresponding to the standard supply voltage and the non-standard supply voltage are different.

4. The apparatus of claim 1, further comprising:

at least two switches for controlling the on-off of the voltage passing through; the number of the switches is equal to the number of the voltages output by the voltage output module;

the PSE controller is specifically configured to control the matching voltage input to the on-bit PD:

the PSE controller enables the switch through which the matching voltage passes such that the switch through which the matching voltage passes allows the matching voltage to pass through and be input to the incumbent PD.

5. A power over Ethernet (PoE) self-adaption method is applied to Power Sourcing Equipment (PSE), and comprises the following steps:

detecting PD information of an on-position powered device PD;

selecting a matching voltage matched with the in-place PD from different voltages output by the PSE according to the detected PD information in a specified time; each voltage output by the PSE includes: the PSE comprises standard power supply voltage supported by the PSE and non-standard power supply voltage supported by the PSE; if the matching voltage matched with the on-site PD is not successfully selected from different voltages output by the voltage output module according to the detected PD information at the end of the designated time, stopping performing classification detection and electrification on the on-site PD;

controlling the matching voltage input to the on-bit PD to power the on-bit PD.

6. The method of claim 5, wherein the PD information is an impedance of the PD in place;

the selecting a matching voltage matched with the bit PD from different voltages output by the PSE according to the detected PD information comprises:

7. The method of claim 6, wherein the standard supply voltage and the non-standard supply voltage have different impedance intervals.

8. The method of claim 5, wherein the controlling the match voltage input to the in-bit PD comprises: