CN114143121A

CN114143121A - POE intermediate equipment and electricity taking method

Info

Publication number: CN114143121A
Application number: CN202010923216.0A
Authority: CN
Inventors: 万军桥; 张军; 王苏; 李进波
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-09-04
Filing date: 2020-09-04
Publication date: 2022-03-04

Abstract

The application discloses POE intermediate equipment and a power taking method, and belongs to the technical field of communication. The POE intermediate device comprises: the input interface is used for being connected with power supply end equipment PSE; the output interface is used for being connected with the power receiving end equipment PD; the processing unit is used for processing the data signal; the power supply control unit is respectively connected with the input interface, the output interface and the processing unit and is used for providing a power supply signal provided by the PSE to the processing unit when the PSE is in a power supply stage for the PD; when the PSE is in a non-power supply phase, the processing unit is not powered.

Description

POE intermediate equipment and electricity taking method

Technical Field

The application relates to the technical field of communication, in particular to POE intermediate equipment and a power taking method.

Background

Active Ethernet (POE) refers to a technology for providing a dc Power supply to a network device (such as a network telephone, a wireless lan access point, or a network switch) while transmitting a data signal to the network device through an Ethernet twisted pair. In POE, a Device providing dc Power is called Power Sourcing Equipment (PSE), and the aforementioned network Device is called Power receiving Device (PD).

The limit of the distance for transmitting the data signal by the ethernet twisted pair is 100 meters, and if the distance is exceeded, a POE extender needs to be added between the PSE and the PD to relay the data signal, so as to extend the transmission distance of the data signal. The POE extender comprises: the PSE comprises a PD chip, a voltage converter, a PSE chip and a switching chip, wherein the PD chip is responsible for receiving a power supply provided by the PSE and supplying power to the switching chip through the voltage converter, and the switching chip performs relay processing on a transmitted data signal and then outputs the data signal to the PD; meanwhile, the PSE chip supplies power to the PD based on the power received by the PD chip.

Including PSE chip and PD chip in this POE extender, two chips are with high costs, the volume is great, leads to whole POE extender with high costs, and the consumption is big, and occupation space is big, and the installation of being not convenient for.

Disclosure of Invention

The invention provides POE (power over Ethernet) intermediate equipment and a power taking method.

In a first aspect, at least one embodiment of the present application provides an active ethernet POE middleware, where the POE middleware includes an input interface, an output interface, and a processing unit.

The input interface is used for being connected with power supply end equipment PSE and receiving power supply provided by the PSE; the output interface is used for being connected with the power receiving end equipment PD and can provide power supply for the PD; the processing unit is used as a core device for data processing in the POE intermediate equipment and is used for processing the data signals; in order to supply power to the processing unit, a power supply control unit is respectively connected with the input interface, the output interface and the processing unit, and when the PSE is in a phase of supplying power to the PD, the power supply control unit supplies power supplied by the PSE to the processing unit, and in the phase, the power supply control unit also supplies the power supplied by the PSE to the PD; in order not to disturb the protocol interaction between the PSE and the PD, the processing unit is not powered while the PSE is in a non-powered phase.

In the POE, a POE protocol is operated between the PSE and the PD, and the power supply process between the PSE and the PD is divided into stages of detection, classification, power supply, power failure and the like. When POE intermediate equipment that this application provided is adopted, PSE and PD realize connecting through input interface, power control unit and output interface, and protocol interaction in the middle of PSE and PD can not be influenced to these interface and unit. And the power supply required by the processing unit is obtained by the power supply control unit from the power supply provided by the PSE based on the stage in which the PSE is located. Only when the PSE is in the phase of supplying power to the PD, the processing unit is supplied with power provided by the PSE, and in other phases the processing unit is not supplied with power, so that it is possible to avoid the processing unit interfering with the interaction of the POE protocol between the PSE and the PD, because if the processing unit is supplied with power in the detection classification phase, the PSE can affect the accurate detection and classification of the PD, if the processing unit is supplied with power in the power-off phase, the PD cannot be normally powered off, which causes a safety risk (for example, in the case of a 48V voltage on the RJ45 connector that has been disconnected from the PD), and if the processing unit is supplied with power in the power-on phase, the POE protocol is not affected. Consequently, POE intermediate equipment that this application provided is under the condition that does not use PD chip and PSE chip, through the opportunity of power control unit control electricity getting, avoids influencing PSE and PD normal work, has realized the normal power supply to the processing unit simultaneously, also is guaranteeing under the condition of normal function, has reduced the cost, the consumption and the volume of whole equipment, has realized the miniaturization, the installation of the equipment of being convenient for.

Optionally, the power control unit comprises a switching subunit and a control subunit.

The switch subunit is connected between the processing unit and the input interface, so that the electrical connection relationship between the processing unit and the input interface can be switched on or off, and the timing of taking electricity by the processing unit can be controlled; the control of the switch subunit is realized by a control subunit, the control subunit is respectively connected with the input interface, the output interface and the switch subunit, and the switch subunit is controlled to be conducted when the PSE is in a power supply stage for the PD; and controlling the switching sub-unit to be disconnected when the PSE is in a non-power supply stage.

The switching subunit is adopted to connect the processing unit and the input interface, and then the control subunit is used to control the switching subunit, so that the processing unit can be ensured to be powered on only when the PSE is in the stage of powering the PD, and the switching subunit is disconnected in other stages, so that the processing unit can not interfere with protocol interaction between the PSE and the PD.

Optionally, the control subunit comprises a control circuit.

The control circuit is connected with the power supply line pair between the input interface and the output interface and the switch subunit respectively, and is used for controlling the on-off of the switch subunit based on the voltage information of the power supply line pair between the input interface and the output interface, and the voltage information of the power supply line pair between the input interface and the output interface is used for indicating the stage where the PSE is located.

Here, the voltage information of the power supply line pair between the input interface and the output interface may be voltage information on one of the power supply lines, or may be voltage information between two power supply lines (that is, voltage information between the power supply line pair and the positive electrode and the negative electrode). Two cases are described below:

in one possible implementation, the control subunit further includes a detection resistor.

Wherein the detection resistor is connected to one of the pair of supply lines; the control circuit is connected with two ends of the detection resistor, can determine voltage information of the two ends of the detection resistor and controls the on-off of the switch subunit based on the voltage information. The voltage information of the two ends of the detection resistor belongs to the voltage information of one power supply line in the foregoing description, and is one implementation of the voltage information of the power supply line pair.

Because the control subunit needs to control the on-off of the switch subunit based on the stage where the PSE is located, the control subunit needs to be able to determine the stage where the PSE is located. In order to achieve the purpose, a detection resistor is arranged between an input interface and an output interface, voltage information at two ends of the detection resistor can indicate a stage where the PSE is located, and a control circuit controls a switch subunit by acquiring the voltage information at two ends of the detection resistor.

In another possible implementation, the control subunit does not include a sense resistor.

The control circuit is respectively connected with the two power supply lines in the power supply line pair and used for controlling the on-off of the switch subunit based on the voltage information between the two power supply lines. The voltage information between the two power supply lines is related to the voltage information between the two power supply lines in the foregoing, and is another implementation of the voltage information of the power supply line pair.

The voltage information between the two power supply lines can also indicate the phase of the PSE, and the control circuit controls the switch subunit by acquiring the voltage information between the two power supply lines.

In the embodiment of the present application, the voltage information may have at least two implementation manners: one, the voltage information includes a voltage value, such as a voltage value across a detection resistor or a voltage value between two power supply lines; alternatively, the voltage information comprises a voltage slope, for example a voltage slope across a sensing resistor or a voltage slope between two supply lines.

In the former implementation manner, the control circuit is configured to control the switching subunit to be turned on when the voltage value is greater than a voltage threshold, and control the switching subunit to be turned off when the voltage value is not greater than the voltage threshold.

At different stages of POE, the electric current size difference between PSE and PD leads to at different stages of POE, and the magnitude of the voltage value of detecting resistance both ends or the voltage value between two power supply lines is different, through detecting above-mentioned voltage value, can confirm the present stage that is located of PSE.

In the latter implementation manner, the control circuit is configured to control the switch subunit to be turned on when the voltage slope is greater than a first slope threshold, and control the switch subunit to be turned off when the voltage slope is less than a second slope threshold, where the voltage slope is a slope of a time-varying curve of the voltage, and the second slope threshold is less than the first slope threshold.

When POE switches in different stages, the current between PSE and PD can change, leads to when POE switches in different stages, and the voltage of detecting resistance both ends or the voltage between two power supply lines can change, through the slope of the detection voltage curve that changes with time, can confirm the current stage that PSE is located.

In the above control scheme, the voltage value or the voltage slope is detected differently, and the threshold value used may be different. For example, the detected voltage value is a voltage value across the detection resistor, and the detected voltage value is a voltage value between the two power supply lines, and in both cases, the voltage threshold may have different values. Of course, the voltage value or the voltage gradient to be detected is different from one another, and the threshold value to be used may be the same.

Besides controlling the on-off of the switch subunit only by depending on the voltage information, the on-off of the switch subunit can be controlled by combining the voltage information and the data signal.

Illustratively, the output interface is connected with the processing unit; the control subunit includes: the control circuit is respectively connected with the power supply line pair between the input interface and the output interface, the switch subunit and the processing unit and is used for controlling whether the switch subunit is conducted or not based on voltage information of the power supply line pair between the input interface and the output interface when the PSE is in a non-power supply stage, and the voltage information of the power supply line pair between the input interface and the output interface is used for indicating a stage where the PSE is located; when the PSE is in a phase of supplying power to the PD, whether the switch subunit is disconnected or not is controlled based on the data signal link state between the output interface and the PD indicated by the processing unit.

In the non-power supply stage, the control circuit controls whether the switch subunit is turned on according to the voltage information of the power supply line pair, and the manner of judging whether the switch subunit is turned on can be the same as the two manners described above. In the power supply phase, whether the switch subunit is disconnected or not may be controlled based on a data signal link state between the output interface and the PD indicated by the processing unit. For example, the data signal link state is normal, which indicates that the PD is not disconnected from the output interface, and the PSE is still in the power supply stage, and at this time, the switch subunit is not turned on; if the data signal link state is disconnection, the PD is disconnected with the output interface, the PSE is switched from the power supply stage to the power-off stage, and at the moment, the switch subunit is disconnected.

Optionally, the power control unit further includes a voltage conversion subunit, where the voltage conversion subunit is connected between the switch subunit and the processing unit, and is configured to perform voltage conversion on the power supply and provide the converted power supply to the processing unit.

The voltage of the power supply provided by the PSE is usually 48V, while the operating voltage of the processing unit is usually small, for example 5V or 3.3V, so that the power supply provided by the PSE needs to be voltage-converted by the voltage conversion sub-unit to meet the power consumption requirement of the processing unit.

Optionally, the POE intermediate device further includes a rectifying unit, and the rectifying unit is connected between the input interface and the power control unit.

A rectifying unit is arranged between the input interface and the power control unit, and the rectifying unit is used for converting the input interface into a PSE + and PSE-power supply line pair to be connected to the output interface no matter whether the input interface carries out power input through a plurality of line pairs.

In the embodiment of the present application, the input interface may input only the power supply, or may input both the power supply and the data signal. That is, the power supply and the data signal can be input by the same interface or by two interfaces.

In a possible implementation, the input interface is further configured to input the data signal.

In this implementation, the input interface includes an electrical interface; or, the input interface comprises an optical-electrical-integration interface.

In another possible implementation manner, the input interface does not input a data signal, and the POE intermediate device further includes: and the signal input interface is used for inputting the data signal.

In this implementation, the input interface includes an electrical interface, and the signal input interface includes an optical signal interface, a wireless interface, or an electrical interface.

Optionally, the output interface comprises an electrical interface or an optical-electrical-unification interface; or, the output interface comprises an electrical interface and an optical signal interface; or, the output interface comprises an electrical interface and a wireless interface; alternatively, the output interface comprises a first electrical interface and a second electrical interface.

Illustratively, the output interface may include an RJ45 interface, and an RJ45 interface is adopted as the output interface, so that the connection with the PD can be facilitated.

For example, an RJ45 plug may be used as an output interface, so that the POE intermediate device is designed as a plug-type intermediate device, which facilitates connection of PDs.

Optionally, the POE intermediate device is a POE extender, and the processing unit includes an ethernet switching chip;

or, the POE intermediate device is a network measurement device, and the processing unit includes a network processor.

The POE intermediate device provided by the application can be applied to a POE extender, and at the moment, the processing unit is realized by adopting an Ethernet switching chip and is used for relaying and processing the data signal; the POE intermediate equipment that this application provided can be applied to in the network measurement equipment, and at this moment, processing unit adopts network processor to realize for carry out data signal's measurement processing.

Optionally, the POE intermediate device is an optical network unit ONU, and the processing unit includes a passive optical network PON chip;

or, the POE intermediate device is an optical fiber transceiver, and the processing unit includes an optical fiber transceiver chip.

The POE intermediate equipment that this application provided can be applied to in the ONU, and at this moment, processing unit adopts the PON chip to realize, and the POE intermediate equipment that this application provided can be applied to in the fiber transceiver, and at this moment, processing unit adopts the fiber transceiver chip to realize, and PON chip and fiber transceiver chip are used for carrying on data signal's processing such as photoelectric conversion.

Optionally, the non-powered phase comprises at least one of a detection, classification and power-down phase.

In a second aspect, at least one embodiment of the present application provides a power taking method, including:

when the PSE is in a power supply stage for the PD, the POE intermediate equipment receives power supply provided by the PSE, and the power supply is used for supporting the POE intermediate equipment to process data signals;

when the PSE is in a non-power supply stage, the POE intermediate device does not receive power supply provided by the PSE.

Optionally, voltage information of a supply line pair between the PSE and the PD is used to indicate the phase in which the PSE is located. Wherein the voltage information of a power supply line pair between the PSE and the PD can be represented by voltage information across a detection resistor located on the power supply line pair.

Optionally, the voltage information comprises a voltage value of a power supply line pair between the PSE and the PD, the PSE being in a powered phase to the PD when the voltage value is greater than a voltage threshold, the PSE being in a non-powered phase when the voltage value is not greater than the voltage threshold.

Optionally, the voltage information comprises a voltage slope of a power supply line pair between the PSE and the PD, the PSE being in a powered phase to the PD when the voltage slope is greater than a first slope threshold, the PSE being in a non-powered phase when the voltage slope is less than a second slope threshold, the voltage slope being a slope of a voltage versus time curve of the power supply line pair between the PSE and the PD, the second slope threshold being less than the first slope threshold.

Drawings

Fig. 1 shows a schematic structural diagram of a POE intermediate device according to an embodiment of the present application;

fig. 2 shows a schematic structural diagram of a POE intermediate device according to an embodiment of the present application;

fig. 3 shows a schematic structural diagram of a POE intermediate device according to an embodiment of the present application;

fig. 4 shows a schematic structural diagram of a POE intermediate device according to an embodiment of the present application;

fig. 5 shows a schematic structural diagram of a POE intermediate device according to an embodiment of the present application;

fig. 6 shows a schematic structural diagram of a POE intermediate device according to an embodiment of the present application;

fig. 7 shows a schematic structural diagram of a POE intermediate device according to an embodiment of the present application;

fig. 8 shows a flowchart of a power taking method according to an embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Fig. 1 shows a schematic structural diagram of a POE intermediate device according to an embodiment of the present application. Referring to fig. 1, the POE middleware 100 includes an input interface 101, an output interface 102, a processing unit 103, and a power control unit 104.

Wherein input interface 101 is used for connecting with PSE 200; the output interface 102 is used for connecting with the PD 300; the processing unit 103 is configured to process the data signal; the power control unit 104 is respectively connected to the input interface 101, the output interface 102 and the processing unit 103, and is configured to provide the power provided by the PSE 200 to the processing unit 103 when the PSE 200 is in a phase of supplying power to the PD; processing unit 103 is not powered while PSE 200 is in the unpowered phase.

In the POE, a POE protocol is operated between the PSE and the PD, and the power supply process between the PSE and the PD is divided into stages of detection, classification, power supply, power failure and the like. When POE intermediate equipment that this application provided is adopted, PSE and PD realize connecting through input interface, power control unit and output interface, and these interfaces and unit are not the consumer, can not influence the agreement interaction between PSE and the PD. And the power supply required by the processing unit is obtained by the power supply control unit from the power supply provided by the PSE based on the stage in which the PSE is located. Only when the PSE is in the phase of supplying power to the PD, the processing unit is provided with the power that the PSE provided, and in other phases, the processing unit is not supplied with power, so, it can be avoided that the processing unit interferes with the POE protocol interaction between the PSE and the PD, because if the processing unit is supplied with power in the detection classification phase, the PSE can influence the accurate detection and classification of the PD, if the processing unit is supplied with power in the power-off phase, the power can result in the unable normal power-off, cause the security risk (for example, the situation that there is 48V voltage on the RJ45 connector that has been disconnected with the PD), and the processing unit is supplied with power in the power-supply phase, the POE protocol can not be influenced. Consequently, POE intermediate equipment that this application provided is under the condition that does not use PD chip and PSE chip, through the opportunity of power control unit control electricity getting, avoids influencing PSE and PD normal work, has realized the normal power supply to the processing unit simultaneously, also is guaranteeing under the condition of normal function, has reduced the cost, the consumption and the volume of whole equipment, has realized the miniaturization, the installation of the equipment of being convenient for.

The POE intermediate equipment that this application provided does not influence POE agreement between PSE and the PD and is mutual, consequently, as long as PSE and PD satisfy POE's standard specification between the upper and lower reaches, just can use this POE intermediate equipment, and this POE intermediate equipment possesses the universality.

In the embodiment of the present application, the PSE may be a PSE device that only provides power, or may be a data device with PSE function that provides both power and data signals.

Wherein the non-powered phase includes at least one of a detection, classification, and power-down phase. For example, the non-powered phases include detection, classification, and power-down phases.

In the POE middleware, the processing unit 100 performs processing on the data signal, including but not limited to relay processing, photoelectric conversion processing, signal measurement processing, and the like.

The relay processing means that the first data signal is received first to obtain information carried therein; then, based on this information, a second data signal is generated and transmitted, by which means an extension of the data signal transmission distance is achieved. The photoelectric conversion processing refers to converting a received optical signal into an ethernet signal, and the signal measurement processing may refer to measuring parameters of a data signal, such as deep packet inspection processing, which may detect data traffic, distinguish data types, and the like, where distinguishing data types may refer to distinguishing data belonging to different types such as games, internet access, and the like.

Fig. 2 shows a schematic structural diagram of a POE intermediate device according to an embodiment of the present application. Referring to fig. 2, a detailed structure of the power control unit 104 is shown in fig. 2 compared to fig. 1, and referring to fig. 2, the power control unit 104 includes a switching subunit 141 and a control subunit 142.

Wherein, the switch subunit 141 is connected between the processing unit 103 and the input interface 101; the control subunit 142 is connected to the input interface 101, the output interface 102, and the switch subunit 141, respectively, and is configured to control the switch subunit 141 to be turned on when the PSE 200 is in a power supply phase for the PD; when PSE 200 is in the non-powered phase, switch subunit 141 is controlled to open.

The switching subunit is adopted to connect the processing unit and the input interface, and then the control subunit is utilized to control the switching subunit, so that the processing unit can be ensured to be powered on only when the PSE is in a power supply stage for the PD, and the switching subunit is disconnected in other stages, so that the processing unit can not interfere protocol interaction between the PSE and the PD.

Illustratively, the switch subunit 141 may be implemented by a Transistor, such as a Metal Oxide Semiconductor Field Effect Transistor (MOSFET) or a Thin Film Transistor (TFT).

When a MOSFET is used as the switching subunit 141, the gate of the MOSFET is connected to the control subunit 142, the source of the MOSFET is connected to the input interface 101, and the drain of the MOSFET is connected to the processing unit 103.

The control subunit 141 controls the on/off of the thin film transistor by controlling the level of the control signal output to the gate of the MOSFET. For example, when the control subunit 141 outputs a high-level control signal to the MOSFET, the MOSFET is in a conducting state, and when the control subunit 141 outputs a low-level control signal to the MOSFET, the MOSFET is in a high-resistance state, that is, the MOSFET is turned off.

In the embodiment of the present application, the control subunit 142 needs to know the phase of the PSE 200 to control the switching subunit 141, and the phase of the PSE 200 can be indicated by using the voltage information of the power supply line pair between the input interface 102 and the output interface 103.

In the POE intermediate device provided in the embodiment of the present application, power transmission is performed between the input interface 102 and the output interface 103 through a pair of power supply lines, that is, the aforementioned pair of power supply lines, and two power supply lines in the pair of power supply lines may be referred to as PSE + and PSE-.

Here, the voltage information of the power supply line pair between the input interface 101 and the output interface 103 may be voltage information on one of the power supply lines or voltage information between two power supply lines. The POE intermediate devices provided in fig. 2 and fig. 3 respectively correspond to these two cases. These two cases are described below with reference to fig. 2 and 3, respectively.

Referring to fig. 2 and 3, in both cases, the control subunit 142 includes a control circuit 1421, and the control circuit 1421 is connected to the power supply line pair between the input interface 101 and the output interface 102 and the switch subunit 141 respectively, and is configured to control on and off of the switch subunit 141 based on voltage information of the power supply line pair between the input interface 101 and the output interface 102.

Referring to fig. 2, in one possible implementation, the control subunit 142 further includes a detection resistor 1422.

Wherein, the detection resistance 1422 is connected to one of the power supply lines in the power supply line pair, as shown in fig. 2, the detection resistance 1422 is connected to the power supply line PSE-; in other implementations, sense resistor 1422 may also be connected to PSE +.

Illustratively, sense resistor 1422 is located on the power supply line between input interface 101 and output interface 102.

The control circuit 1421 is connected to two ends of the detection resistor 1422, and is configured to control on/off of the switch subunit 141 based on voltage information at two ends of the detection resistor 1422. In one implementation of the voltage information across the sense resistor, i.e., the voltage information of the power supply line pair, the voltage information across the sense resistor 1422 can be used to indicate the stage of the PSE 200.

Illustratively, to avoid the influence of sense resistor 1422 on PSE 200 to power PD 300, the value of sense resistor 1422 is usually set to be small, for example, the value of sense resistor 1422 may be 0.1 ohm.

Referring to fig. 3, in another possible implementation, the control subunit 142 does not include a sense resistor.

The control circuit 142 is connected to each of the two power supply lines in the pair of power supply lines, and controls on/off of the switch subunit 142 based on voltage information between the two power supply lines. In another implementation of the voltage information between two power supply lines, namely the voltage information of the power supply line pair, the voltage information between two power supply lines can be used to indicate the phase in which the PSE 200 is located.

In the above implementation, the control circuit 1421 needs to have the following functions: firstly, the voltage information can be acquired, and secondly, control signals with different levels can be output to the switch subunit based on different detected voltage information, so that the on-off of the switch subunit is controlled. The control Circuit 1421 may include a comparator, which may compare the voltage information with a threshold value and then output a high-low level control signal, where the control signal is used to control the on/off of the switch subunit, and the control Circuit 1421 may be implemented by an Integrated Circuit (Integrated Circuit) or a discrete component.

In this application, the voltage information may include a voltage value, for example, a voltage value across the detection resistor or a voltage value between two power supply lines, and in different stages of POE, the current between the PSE and the PD is different, which results in that in different stages of POE, the voltage value across the detection resistor or the voltage value between two power supply lines is different, and by detecting the voltage value, the stage where the PSE is currently located can be determined. The voltage information may also include a slope of a voltage, or referred to as a slope of a change of a voltage across the detection resistor, where the slope of the voltage is a slope of a time-varying curve of the voltage across the detection resistor, for example, a slope of a voltage across the detection resistor or a slope of a voltage between two power supply lines, when the POE switches in different phases, a current between the PSE and the PD may vary, so that when the POE switches in different phases, the voltage across the detection resistor or the voltage between two power supply lines may vary, and the phase where the PSE is currently located may be determined by the slope of the time-varying curve of the voltage.

Illustratively, the control circuit 1421 is configured to control the switch subunit 141 to be turned on when the voltage value is greater than the voltage threshold, and to control the switch subunit 141 to be turned off when the voltage value is not greater than the voltage threshold.

Wherein the voltage threshold may be determined based on the resistance of the portion to be detected and the supply phase current. For example, based on the magnitude of the resistor of the detection resistor and the magnitude of the current provided by PSE 200 to the PD during the power supply phase, the voltage value across the detection resistor during the power supply phase can be determined, while in other phases the voltage value across the detection resistor is much smaller than this, and therefore, a voltage value smaller than the voltage across the detection resistor during the power supply phase can be used as the voltage threshold.

It should be noted that different PDs 300 have different power ratings, such as 15W, 30W, 60W, etc., and the power supplied by PSE 200 is different for PDs 300 with different powers, so the voltage threshold can be set based on the PD 300 with the smallest power.

Illustratively, the control circuit 1421 is configured to control the switch subunit 141 to be turned on when the voltage slope is greater than a first slope threshold, and to control the switch subunit 141 to be turned off when the voltage slope is less than a second slope threshold, where the voltage slope is a slope of a voltage time-varying curve, and the second slope threshold is less than the first slope threshold.

Taking the voltage change at the two ends of the detection resistor as an example, since the voltage at the two ends of the detection resistor 1422 continuously rises from the end of the classification stage to the beginning of the power supply stage, the voltage slope is positive at this time, and is larger than the voltage slope at other stages, it can be determined whether the PSE enters the power supply stage through the first slope threshold; from the end of the power supply phase to the power off phase, the voltage across the detection resistor 1422 continuously decreases, and the voltage slope is negative at this time, and is smaller than the voltage slopes of other phases, so that it can be determined whether the PSE leaves the power supply phase or not through the second slope threshold, and the PSE enters the power off phase. When the voltage slope between the two power supply lines is detected, the change situation is the same as the voltage change situation at the two ends of the detection resistor, and the description is omitted here.

Besides controlling the on-off of the switch subunit only by depending on the voltage information, the on-off of the switch subunit can be controlled by combining the voltage information and the data signal. Fig. 4 shows a schematic structural diagram of a POE middleware provided in an embodiment of the present application, in which, compared to the POE middleware of fig. 3, the control circuit 1421 is further connected to the processing unit 103.

In fig. 4, the output interface 102 is connected to the processing unit 103; control circuit 1421 is configured to control whether switch subunit 141 is turned on or not based on voltage information of a power supply line pair between input interface 101 and output interface 102 when PSE 200 is in a non-power supply stage; when PSE 200 is in the phase of powering a PD, it is controlled whether switch subunit 141 is open or not based on the state of the data signal link between output interface 102 and PD 300 as indicated by processing unit 103.

In the non-power-supply stage, the control circuit 1421 controls whether the switch subunit is turned on or not according to the voltage information of the power supply line pair, and the manner of determining whether the switch subunit is turned on or not may be the same as the two manners described above, for example, the implementation manner corresponding to fig. 2 or fig. 3, the circuit structure in fig. 3 is adopted as the partial circuit structure for determining the voltage information in fig. 4, and in other implementation manners, the circuit structure in fig. 2 may also be adopted (that is, the manner of arranging the detection resistor).

In the power supply phase, whether the switch subunit 141 is disconnected or not may be controlled based on the data signal link status between the output interface 102 and the PD 300 indicated by the processing unit 103. For example, the data signal link status is normal, which indicates that the PD 300 is not disconnected from the output interface 102, and the PSE 200 is still in the power supply phase, and the switch subunit 141 is not turned on; if the data signal link state is off, it indicates that the PD 300 is disconnected from the output interface 102, and the PSE 200 shifts from the power supply phase to the power off phase, at which time the switch subunit 141 is disconnected.

In this implementation, processing unit 103 may detect the aforementioned data signal link status and provide an indication signal to control circuitry 1121 based on the data signal link status. When the indication signal indicates that the data signal link status is off, the control circuit 1121 controls the switch subunit 141 to be off.

Referring again to fig. 2, 3 and 4, the power control unit 104 further includes a voltage conversion subunit 143.

The voltage conversion subunit 143 is connected between the switching subunit 141 and the processing unit 103; the voltage conversion subunit 143 is configured to perform voltage conversion on the power supply and provide the converted power supply to the processing unit 103.

Illustratively, the voltage converting subunit 143 may have 2 inputs, one of which is connected to one supply line (e.g., PSE-) of a supply line pair via the switching subunit 141 and the other of which is connected to the other supply line (e.g., PSE +) of the supply line pair.

The power class of the power source provided by the PSE is usually divided into 15W, 30W or 60W gears, and the aforementioned 15W, 30W or 60W is the maximum power of each gear respectively. The PSE selects a proper gear to output power based on the classification of the PD, the rated power of the PD is usually smaller than the maximum power of the gear selected by the PSE, and under the condition that the power of the power needed by the processing unit is smaller (for example, about 3W), the power provided by the PSE on the selected gear can meet the power consumption requirements of the PD and the processing unit at the same time, so that when the PSE is in the stage of supplying power to the PD, power is taken from the power provided by the PSE and supplied to the processing unit, and the normal work of the PD cannot be influenced. If extreme conditions occur, the power supply power provided by the PSE is not enough to support the operation of the PD and the processing unit at the same time, and the power level of the output power supply of the PSE can be increased, so that the normal operation of the PD and the processing unit is ensured.

Although the power is taken from the power supply provided by the PSE and supplied to the processing unit, the normal operation of the PD is not affected, but the voltage of the power supply provided by the PSE (the voltage between the PSE + and the PSE-) is generally 48V, and the operating voltage of the processing unit is generally smaller, for example, 5V or 3.3V, so that the power supply provided by the PSE needs to be subjected to voltage conversion by the voltage conversion sub-unit 143 and then output to the processing unit, so as to meet the power consumption requirement of the processing unit.

Exemplarily, the voltage converting subunit 143 may be a Direct Current-Direct Current (dc-dc) converter.

In this embodiment of the application, the data signal received by the POE intermediate device may be an ethernet signal or an optical signal. According to different types of data signals, the types of POE intermediate devices and the types of processing units are also different.

Illustratively, the data signal is an ethernet signal, and the POE intermediate device 100 is a POE extender or a network measurement device;

correspondingly, POE middleware 100 is a POE extender, and processing unit 103 includes an ethernet switching chip. The POE intermediate device is a network measurement device, and the processing unit 103 includes a network processor.

The POE intermediate device provided by the application can be applied to a POE extender and network measurement equipment, and at the moment, the processing unit is realized by adopting an Ethernet switching chip and is used for relaying data signals; the POE intermediate equipment that this application provided can be applied to in the network measurement equipment, and at this moment, processing unit adopts network processor to realize for carry out data signal's measurement processing.

Illustratively, the data signal is an Optical signal, and the POE middleware 100 is an Optical Network Unit (ONU) or an Optical fiber transceiver;

accordingly, POE middleware 100 is an ONU, and processing unit 103 includes a Passive Optical Network (PON) chip. POE middleware 100 is a fiber optic transceiver, and processing unit 103 includes a fiber optic transceiver chip.

The POE intermediate equipment provided by the application can be applied to an ONU (optical network unit) or an optical fiber transceiver, and at the moment, the processing unit is realized by adopting a PON (passive optical network) chip or an optical fiber transceiver chip and is used for carrying out photoelectric conversion and other processing on data signals.

When the ONU is installed in a part of a room, it may be difficult to take power locally. For example, the ONU with the Wi-Fi is arranged on a ceiling, and the installation position is far away from a power plug, so that the power taking is difficult. At this moment, get the electricity from the power that PSE provided the PD through above-mentioned mode, solved the problem of getting the electricity difficulty that the restriction of mounted position caused.

In the embodiment of the present application, one or more POE intermediate devices may be disposed between PSE 200 and PD 300 at intervals, for example, the transmission distance of the ethernet signal between PSE and PD is extended by disposing multiple POE intermediate devices. The PoE extender can extend the PoE transmission distance of 100 meters by regenerating the Ethernet electric signal, and the transmission distance of the data signal N multiplied by 100 meters is realized by a plurality of PoE extenders.

The POE intermediate equipment provided by the embodiment of the application can be applied to one-to-one scenes of the PSE and the PD and can also be applied to one-to-many scenes of the PSE and the PD. Wherein, PSE and PD are one-to-many, that is, 1 PSE simultaneously supplies power to a plurality of PDs, for example, PSE outputs 60W power, and simultaneously supplies power to 4 PDs of 15.

In a one-to-many scenario, a POE intermediate device may be disposed between each PSE and PD, or may be disposed only between the PSE and some PDs.

In the embodiment of the present application, there may be two implementation manners for inputting the data signal: the first implementation mode comprises the following steps: a data signal is input by the input interface 101. The second implementation mode comprises the following steps: the data signal is input by an interface other than the input interface 101. These two implementations are explained below separately.

Fig. 5 shows a schematic structural diagram of a POE intermediate device according to an embodiment of the present application. Referring to fig. 5, in the POE intermediate device, the input interface 101 is further configured to input a data signal, that is, the power and the data signal are transmitted through the same interface.

In this implementation, the input interface 101 includes an electrical interface; alternatively, the input interface 101 includes an optoelectronics-in-one interface.

The opto-electronic interface may be a Hybrid interface in which a pair of power lines (e.g. 2 copper lines) and an optical interface are designed together, and the optical interface in the Hybrid interface may be a subscriber Connector (SC standards for subscriber Connector), a pin Connector (FC), or a Lucent Connector (LC) interface, in which the data signal and the power line are still transmitted separately and are independent of each other.

Wherein, the electrical interface can be an RJ45 interface. When the input interface 101 is an RJ45 interface, data signals and power are transmitted through the same line, and therefore, an isolation transformer needs to be configured in the POE intermediate device.

Fig. 6 shows a schematic structural diagram of a POE intermediate device according to an embodiment of the present application. Referring to fig. 6, the POE intermediate device includes a first isolation transformer 105, and the first isolation transformer 105 includes a first primary coil 151 and a first secondary coil 152.

The first primary coil 151 of the first isolation transformer 105 is connected to the input interface 101, the output interface 102 and the power control unit 104 respectively; the first secondary winding 152 of the first isolation transformer 105 is connected to the processing unit 103.

By providing the first isolation transformer 105, noise can be optimized, and the quality of the data signal output to the processing unit 103 can be improved.

When the output interface 102 is also implemented by using the RJ45 interface, the POE intermediate device may further include a second isolation transformer 106, where the second isolation transformer 106 includes a second primary coil 161 and a second secondary coil 162.

The second primary coil 161 of the second isolation transformer 106 is connected to the input interface 101, the output interface 102 and the power control unit 104 respectively; the second secondary coil 162 of the second isolation transformer 106 is connected to the processing unit 103.

The input interface 101 and the output interface 102 may be connected via the center taps of 2 isolation transformers, both of which are connected to the primary winding.

In the RJ45 interfaces, each includes 4 pairs, 2 signal pairs and 2 idle pairs, as shown in fig. 6, where numbers 1 and 2 are one signal pair, numbers 3 and 6 are one signal pair, numbers 4 and 5 are one idle pair, and numbers 7 and 8 are one idle pair.

Each pair may correspond to a group of coils, with both wires of each pair being connected to the same primary coil and different pairs being connected to different primary coils. And the secondary coils of each group of coils are connected with the processing unit, so that signals sensed by the secondary coils are output to the processing unit.

Referring to fig. 6, the POE intermediate device may further include a rectifying unit 107, where the rectifying unit 107 is connected between the input interface 101 and the power control unit 104. A rectifying unit is arranged between the input interface and the power supply control unit.

In the POE intermediate device shown in fig. 6, the rectifying unit 107 is connected between the first isolation transformer 105 and the power supply control unit 104 due to the presence of the first isolation transformer 105.

The rectifying unit 107 may be a rectifying bridge, and the rectifying bridge may be formed by connecting 4 rectifying diodes.

When the PSE supplies power to the PD, the PSE can adopt 2 signal line pairs to supply power, also can adopt 2 idle line pairs to supply power, and also can adopt 4 line pairs to supply power simultaneously. Whether the PSE is powered over several pairs, it is converted to a PSE + and PSE-supply line pair for transmission via the rectification unit 107.

In the configuration shown in fig. 5, both power and data signals are provided by a PSE, which may be a switch, and the PD may be an Access Point (AP).

Fig. 6 shows the case of supplying power to the PD via 4 line pairs, in which case 2 rectifier bridges are required, wherein 2 signal line pairs are connected to the same rectifier bridge via the primary winding, and are respectively connected to 2 input terminals of the rectifier bridge, and 2 idle line pairs are connected to the same rectifier bridge via the primary winding. The positive pole outputs of the 2 rectifier bridges are connected to form PSE +, and the negative pole outputs of the 2 rectifier bridges are connected to form PSE-. PSE + and PSE-are transmitted over 2 wires and then divided into 4 wires connected to 4 sets of windings of the second isolation transformer 106. illustratively, PSE + connects the windings corresponding to 1, 2 pairs and 7, 8 pairs in the output interface 102 and PSE-connects the windings corresponding to 3, 6 pairs and 4, 5 pairs in the output interface 102.

As shown in fig. 6, the power control unit 104 is connected to the PSE + and PSE-, respectively.

The aforementioned sampling resistor may be provided on either one of the PSE + and PSE-. The aforementioned sampling resistor may be disposed on a PSE line, and the PSE + may be directly connected to the voltage conversion subunit, and the PSE may be connected to the voltage conversion subunit through the switch subunit.

When adopting 2 line pairs to supply power, this arrangement unit can only include 1 rectifier bridge, and this POE intermediate equipment may not set up rectifier bridge even.

Even if the photoelectric integrated interface is adopted, the power supply is transmitted only through 2 wires, and a rectifying unit can be arranged between the input interface and the power supply control unit.

Fig. 7 shows a schematic structural diagram of a POE intermediate device according to an embodiment of the present application. Referring to fig. 7, the POE middleware further includes a signal input interface 108.

In the POE intermediate device, the input interface 101 is only used for inputting a power source, and the signal input interface 108 is used for inputting a data signal, that is, the power source and the data signal are transmitted by using different interfaces.

Wherein the input interface 101 comprises an electrical interface and the signal input interface 108 may comprise an optical signal interface, a wireless interface or an electrical interface.

Illustratively, input interface 101 comprises an RJ45 interface and signal input interface 108 comprises an optical signal interface, in which case the data signals are transmitted using a fiber optic medium.

Illustratively, input interface 101 comprises an RJ45 interface and signal input interface 108 comprises an RS232 interface, where data signals are transmitted over the RS232 interface.

In this implementation, a rectifying unit may be provided between the input interface and the power control unit.

In this implementation, the output interface 102 may also be implemented by using an RJ45 interface, and in this case, the POE intermediate device may include a second isolation transformer.

In the configuration shown in fig. 7, power is provided by the PSE, and the data signal may be provided by an optical splitter in the PON, the PSE being a POE powered device and the PD being an AP.

In the embodiment of the present application, the output interface 102 is implemented similarly to the input interface 101, for example, the output interface 102 may be implemented by using one interface, and the interface may output only power or output both power and data signals. For another example, the output interface 102 may be implemented by 2 interfaces, and the 2 interfaces respectively output power and data signals.

When implemented using one interface, the input interface 101 includes an electrical interface or an opto-electronic interface. When two interfaces are adopted for implementation, the output interface comprises 102 an electrical interface and an optical signal interface; alternatively, the output interface 102 includes an electrical interface and a wireless interface; alternatively, the output interface 102 includes a first electrical interface and a second electrical interface.

Illustratively, the output interface 102 may be an RJ45 interface; and an RJ45 interface is adopted as an output interface, so that the connection with a PD can be ensured. For example, the RJ45 interface may be an RJ45 jack or an RJ45 plug. When the RJ45 plug is used as an output interface, the POE intermediate equipment can be designed into plug-type intermediate equipment, and the connection with a PD is more convenient.

Because the POE intermediate equipment that this application provided has saved PD chip and PSE chip, whole small, whole POE intermediate equipment can make the cuboid, cooperates the design of aforementioned plug for this POE equipment need not the installation, relies on bearing of cable can realize fixing.

The POE middleware 100 provided by the present application can supply power to the PD 300 and provide a data signal to the PD 300, for example, the POE middleware is a POE extender. At this time, the output interface 102 is connected with the processing unit 103 so that the output interface 102 simultaneously outputs power and data signals, for example, as shown in fig. 5.

The POE middleware 100 provided by the present application may also only provide power to the PD 300, and does not provide data signals to the PD 300, for example, the POE middleware is a network measurement device. At this time, the output interface 102 is not connected to the processing unit 103, for example, as shown in fig. 7. In this case, processing unit 103 of POE middleware 100 may be connected to other devices except PD 300 through a separate interface, and accordingly, the data signal source of PD 300 may also be provided by another device except POE middleware 100.

Whether or not POE middleware 100 outputs a data signal to PD 300 is independent of the form of input interface 101. Both of the input interfaces 101 shown in fig. 5 and fig. 7 may be designed such that POE intermediate device 100 outputs a data signal to PD 300, or does not output a data signal to PD 300.

Fig. 8 shows a flowchart of a power taking method according to an embodiment of the present application. Referring to fig. 8, the power taking method includes:

in step 401, when the PSE is in a phase of supplying power to the PD, the POE intermediate device receives power provided by the PSE, where the power is used to support the POE intermediate device to perform signal processing.

The POE middleware also provides power to the PD when the PSE is in a power phase with the PD.

In step 402, the POE intermediate device does not receive power provided by the PSE while the PSE is in the unpowered phase.

In this embodiment of the application, the POE intermediate device may adopt a POE intermediate device as shown in any one of fig. 1 to 6, and in step 401, the power provided by the PSE is received by controlling a switch subunit in the POE intermediate device to be turned on. In step 402, the power provided by the PSE is not received by controlling the switch subunit in the POE middleware to open.

Illustratively, the non-powered phases include detection, classification, and power-down phases.

Optionally, voltage information of the power supply line pair between the PSE and the PD is used to indicate the phase in which the PSE is located. Here the pair of supply lines between PSE and PD are PSE + and PSE-in fig. 6.

Illustratively, the voltage information includes a voltage value of a pair of power supply lines between the PSE and the PD, the PSE being in a power supplying phase to the PD when the voltage value is greater than a voltage threshold, the PSE being in a non-power supplying phase when the voltage value is not greater than the voltage threshold.

Illustratively, the voltage information includes a voltage slope of a power supply line pair between the PSE and the PD, the PSE being in a power supplying phase to the PD when the voltage slope is greater than a first slope threshold, the PSE being in a non-power supplying phase when the voltage slope is less than a second slope threshold, the voltage slope being a slope of a voltage versus time curve of the power supply line pair between the PSE and the PD, the second slope threshold being less than the first slope threshold.

The voltage information of the power supply line pair between the PSE and the PD can be represented by the voltage information at two ends of a detection resistor on one power supply line in the power supply line pair between the PSE and the PD, and can be represented by the voltage information between two power supply lines in the power supply line pair between the PSE and the PD.

The above description is only an alternative embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application are included in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An active ethernet POE intermediate device is located between Power Sourcing Equipment (PSE) and power receiving end device (PD), and is characterized in that the POE intermediate device includes:

an input interface for connection with the PSE;

an output interface for connecting with the PD;

the processing unit is used for processing the data signal;

the power supply control unit is respectively connected with the input interface, the output interface and the processing unit and is used for providing the power supply provided by the PSE to the processing unit when the PSE is in a power supply stage for the PD; when the PSE is in a non-power supply phase, the processing unit is not powered.

2. The POE intermediate device of claim 1, wherein the power control unit comprises:

the switch subunit is connected between the processing unit and the input interface;

the control subunit is respectively connected with the input interface, the output interface and the switch subunit, and is used for controlling the switch subunit to be conducted when the PSE is in a power supply stage for the PD; and controlling the switching sub-unit to be disconnected when the PSE is in a non-power supply stage.

3. The POE intermediate apparatus of claim 2, wherein the control subunit comprises:

the control circuit is respectively connected with the input interface, the power supply line pair between the output interface and the switch subunit and used for controlling the on-off of the switch subunit based on the voltage information of the power supply line pair between the input interface and the output interface, and the voltage information of the power supply line pair between the input interface and the output interface is used for indicating the stage where the PSE is located.

4. The POE intermediate apparatus of claim 3, wherein the control subunit further comprises:

a detection resistor connected to one of the pair of power supply lines;

and the control circuit is connected with two ends of the detection resistor and used for controlling the on-off of the switch subunit based on the voltage information at the two ends of the detection resistor.

5. The POE intermediate device of claim 3, wherein the control circuit is connected to each of the two power supply lines in the pair of power supply lines, and is configured to control the switching of the switch subunit based on voltage information between the two power supply lines.

6. The POE intermediate device of any of claims 3 to 5, wherein the voltage information includes a voltage value, and the control circuit is configured to control the switching subunit to be turned on when the voltage value is greater than a voltage threshold, and to control the switching subunit to be turned off when the voltage value is not greater than the voltage threshold.

7. The POE intermediate apparatus of any of claims 3 to 5, wherein the voltage information comprises a voltage slope, and wherein the control circuit is configured to control the switching subunit to be turned on when the voltage slope is greater than a first slope threshold, and to control the switching subunit to be turned off when the voltage slope is less than a second slope threshold, wherein the voltage slope is a slope of a voltage time-varying curve, and the second slope threshold is less than the first slope threshold.

8. The POE intermediate device of claim 2, wherein the output interface is connected to the processing unit; the control subunit includes:

the control circuit is respectively connected with the power supply line pair between the input interface and the output interface, the switch subunit and the processing unit and is used for controlling whether the switch subunit is conducted or not based on voltage information of the power supply line pair between the input interface and the output interface when the PSE is in a non-power supply stage, and the voltage information of the power supply line pair between the input interface and the output interface is used for indicating a stage where the PSE is located; when the PSE is in a phase of supplying power to the PD, whether the switch subunit is disconnected or not is controlled based on the data signal link state between the output interface and the PD indicated by the processing unit.

9. The POE intermediate device of any one of claims 2 to 8, wherein the power control unit further comprises:

a voltage conversion subunit connected between the switch subunit and the processing unit;

and the voltage conversion subunit is used for performing voltage conversion on the power supply and providing the converted power supply for the processing unit.

10. The POE middleware of any one of claims 1 to 9, wherein the POE middleware further comprises:

and the rectifying unit is connected between the input interface and the power supply control unit.

11. The POE intermediate device of any one of claims 1 to 10, wherein the input interface is further configured to input the data signal.

12. The POE intermediate device of claim 11, wherein the input interface comprises an electrical interface;

or, the input interface comprises an optical-electrical-integration interface.

13. The POE middleware of any one of claims 1 to 10, wherein the POE middleware further comprises:

and the signal input interface is used for inputting the data signal.

14. The POE intermediate device of claim 13, wherein the input interface comprises an electrical interface, and wherein the signal input interface comprises an optical signal interface, a wireless interface, or an electrical interface.

15. The POE intermediate device of any one of claims 1 to 14, wherein the output interface comprises an electrical interface or an optical-electrical interface;

or, the output interface comprises an electrical interface and an optical signal interface;

or, the output interface comprises an electrical interface and a wireless interface;

alternatively, the output interface comprises a first electrical interface and a second electrical interface.

16. The POE middleware of any one of claims 1 to 15, wherein the POE middleware is a POE extender, and the processing unit includes an ethernet switching chip;

17. The POE intermediate device of any one of claims 1 to 15, wherein the POE intermediate device is an optical network unit, ONU, and the processing unit comprises a passive optical network, PON, chip;

18. The POE intermediate device of any of claims 1 to 17, wherein the non-powered phase comprises at least one of a detection, classification, and power-down phase.

19. A power taking method is characterized by comprising the following steps:

when power supply end equipment (PSE) is in a power supply stage of power receiving end equipment (PD), active Ethernet (POE) intermediate equipment receives power supply provided by the PSE, wherein the power supply is used for supporting the POE intermediate equipment to perform data signal processing;

20. The method of claim 19, wherein voltage information of a power supply line pair between the PSE and the PD is used to indicate a phase in which the PSE is located.

21. The method of claim 20, wherein the voltage information comprises a voltage value of a pair of power supply lines between the PSE and the PD, wherein the PSE is in a powered phase with the PD when the voltage value is greater than a voltage threshold, and wherein the PSE is in a non-powered phase when the voltage value is not greater than the voltage threshold.

22. The method of claim 20, wherein the voltage information comprises a voltage slope of a power supply line pair between the PSE and the PD, wherein the PSE is in a powered phase with the PD when the voltage slope is greater than a first slope threshold, wherein the PSE is in a non-powered phase when the voltage slope is less than a second slope threshold, wherein the voltage slope is a slope of a voltage versus time curve of the power supply line pair between the PSE and the PD, and wherein the second slope threshold is less than the first slope threshold.

23. The method of any one of claims 19 to 22, wherein the non-powered phase comprises at least one of a detection, classification and power-down phase.