KR20160019659A - METHOD AND APPARATUS FOR SETTING OF PoE CLASS - Google Patents

METHOD AND APPARATUS FOR SETTING OF PoE CLASS Download PDF

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Publication number
KR20160019659A
KR20160019659A KR1020140104211A KR20140104211A KR20160019659A KR 20160019659 A KR20160019659 A KR 20160019659A KR 1020140104211 A KR1020140104211 A KR 1020140104211A KR 20140104211 A KR20140104211 A KR 20140104211A KR 20160019659 A KR20160019659 A KR 20160019659A
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South Korea
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class
power
power consumption
additional
resistance
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KR1020140104211A
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Korean (ko)
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이종현
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에릭슨엘지엔터프라이즈 주식회사
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Priority to KR1020140104211A priority Critical patent/KR20160019659A/en
Publication of KR20160019659A publication Critical patent/KR20160019659A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/10—Current supply arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/12—Arrangements for remote connection or disconnection of substations or of equipment thereof

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)

Abstract

The present invention relates to a method and apparatus for setting a class of a power over Ethernet (PoE) which can provide power to a powered device (PD) even when performing a class determining operation of the PD. According to the present invention, the apparatus for setting the class of the PoE periodically determines a connection of at least one additional device, and when the additional device is connected to the PD, supplies auxiliary power needed for an operation of the PD and the additional device, blocks the supply of driving power supplied to the PD, and determines the class of the PD by considering values of first class resistance of the PD and second class resistance of the additional device.

Description

[0001] METHOD AND APPARATUS FOR SETTING OF POE CLASS [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PoE (Power over Ethernet) system, and more particularly, to a PoE class setting method and apparatus capable of supplying power to a power consuming device during a class determining operation of a power consuming device (PD).

BACKGROUND ART As information and communication technologies have advanced, personal computers, network storage, servers, as well as wireless access points, Bluetooth access points, Voice over (VoIP) Internet Protocol (IP) phones, network cameras, etc., are connected to a local area network (LAN), for example Ethernet, to be used in conjunction with other devices. The Power over Ethernet (PoE) system is designed to provide more effective power to these power consumption devices, and it provides data communication and power simultaneously through the Ethernet cable to power consumption devices that require both data communication and power supply. And it has an advantage that cost, time, manpower, and the like for installing the existing power supply equipment (for example, power cable, AC outlet, etc.) can be reduced.

Power over Ethernet (PoE) systems include Power Sourcing Equipment (PSE), Powered Devices (PD) powered by Ethernet cables from power supplies, and Add-ons (for example, DMB Digital Multimedia Broadcast) function). When the power consumption apparatus is connected to the Ethernet cable, the power supply apparatus preferentially performs a class determination operation for determining a level of power required to drive the power consumption apparatus, that is, a class of the power consumption apparatus. IEEE 802.3af International Standard for PoE Systems classifies Class 0 to Class 4 according to power consumption classification of power consuming devices. Describing the class determination operation in detail, when the power supply device detects that the power consumption device is connected to the Ethernet cable, a predetermined class detection voltage (for example, 18 V) is transmitted through the Ethernet cable to the class resistance And receives the class sensing current generated from the class resistor through the Ethernet cable to determine the level of power to be provided to the power consuming device according to the magnitude of the class sensing current. That is, the power supply apparatus determines a level of power to be provided to the power consumption apparatus, in accordance with the resistance value of the class resistor provided in the power consumption apparatus.

If further expansion of the power consumption device is to be ensured, the power supply of the power supply must be increased simultaneously by the consumed power of the additional power consumption device. In this case, the power of the power consuming device is calculated, the resistance value is changed, the class of the power consuming device is set, and the power is supplied in accordance with the number of expansion of the power consuming device. However, an additional device is added to the power consumption device, so that power supply to the power consumption device is interrupted during the process of the power supply device performing the class determination operation again of the power consumption device.

Korean Patent Publication No. 10-2013-0055568 (published on May 28, 2018)

The present invention provides a PoE class setting method and apparatus capable of supplying power to a power consuming device even during a class determining operation of a PD (Powered Device).

The PoE class setting device included in the power consumption device of the present invention includes a PoE power supply unit for supplying driving power, a first class resistor having a predetermined resistance value, and a PoE power supply unit for connecting the PoE power supply unit and the first class resistance Wherein the control unit controls the power consumption of the power consumption device and the power consumption of the at least one power supply when at least one additional device each including a second class resistance is connected to the power consumption device, Supplies the auxiliary power required for the operation of the additional apparatus and cuts off the supply of the driving power.

The PoE class setting method for setting the PoE class of the power consumption device of the present invention may include: periodically determining whether at least one additional device is connected; Supplying auxiliary power required for operation of said power consumption device and said at least one additional device when said at least one additional device is connected to said powered device; Interrupting supply of driving power supplied to the power consumption device; And determining a class of the power consuming device by considering a resistance value of a first class resistance of the power consumption device and a resistance value of a second class resistance of the at least one additional device.

According to the present invention, it is possible to power a power consumption device and at least one additional device during a process of performing a class determination operation between a power supply device and a power consumption device of a PoE (Power over Ethernet) system to prevent system shutdown have.

1 is a diagram illustrating a configuration of a PoE (Power over Ethernet) system according to an embodiment of the present invention;
2 is a block diagram of a power consumption device according to an embodiment of the present invention;
3 is a block diagram showing a configuration of an additional apparatus according to an embodiment of the present invention;
4 is an exemplary view showing an electrical connection relationship between a first class resistance of the power consumption device and second class resistors of the additional devices according to the embodiment of the present invention.
5 is a flowchart illustrating a procedure of a PoE class setting method according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions will not be described in detail if they obscure the subject matter of the present invention.

1 is a diagram illustrating a configuration of a PoE (Power over Ethernet) system according to an embodiment of the present invention.

1, the PoE system 100 includes a power supply device (PSE) 110, a powered device (PD) 120 that receives power from the power supply device 110 And at least one additional device (e.g., first and second additional devices 131, 132) that provide additional functionality to the power consuming device 120. In one embodiment, the power supply 110 and the power consumption device 120 may be connected to a communication cable (e.g., Ethernet cable) EC and the power consumption device 120 may be connected to an Ethernet cable EC, And can perform data communication with other network devices (not shown) including the power supply device 110 via the Ethernet cable EC. The configuration of the Ethernet cable (EC) and the operation of performing data communication through it correspond to technologies known through related standards such as IEEE (Institute of Electrical and Electronics Engineers) 802.3af, and a detailed description thereof will be omitted.

The power supply 110 is connected to the power supply 120 via the Ethernet cable EC so that when the power supply 120 is connected to the Ethernet cable EC, ) Can be performed. In one embodiment, the power supply 110 may apply a connection sense voltage to the Ethernet cable EC to sense whether the power consuming device 120 is connected to the Ethernet cable EC, (For example, 18 V) can be applied to the connected power consumption device 120 via the Ethernet cable EC when the connection of the power supply 120 is detected. A configuration in which the power supply apparatus 110 senses whether or not the power consumption apparatus 120 is connected and provides the class sensing voltage to the power consumption apparatus 120 is disclosed in a related standard such as IEEE 802.3af, Detailed explanation of bar is omitted.

The power consumption device 120 has a class resistance having a predetermined resistance value. When the class sense voltage is applied from the power supply device 110, the level of the power required to drive the power consumption device 120, that is, To generate a class sensing current that represents the class of the device 120. In one embodiment, the class sense current may represent a class having a higher minimum output level as the size is larger. Table 1 shows classifications according to embodiments of the present invention.

class Whether or not to use Minimum power level at PSE 0 default 15.4 W One option 4.0 W 2 option 7.0 W 3 option 15.4 W 4 Reserved for future use Treat it as class 0

In one embodiment, when one or more additional devices (e.g., first and second additional devices 131, 132) are connected to the power consumption device 120, the power consumption device 120 The class sensing current can be generated by reflecting the power required to drive the connected additional devices 131 and 132 as well as the power consumption device 120. [ For example, when a total power of 14.3 W is required in a state in which the first and second additional devices 131 and 132 are connected while only 5.1 W of power is required to drive only the power consumption device 120, The device 120 is a class of a size corresponding to the class 2 (i.e., the class having the minimum power output of the power supply 110 of 7.0 W) in a state where the first and second additional devices 131 and 132 are not connected, A class of a size corresponding to the class 0 (i.e., the class having the minimum power output of the power supply 110 of 15.4 W) in a state where the first and second additional devices 131 and 132 are connected, It is possible to generate a sense current.

The power supply device 110 receives the class sensing current generated from the power consumption device 120 through the Ethernet cable, determines the class of the power consumption device 120 according to the magnitude of the class sensing current, Sized driving power to the power consumption device 120. [ The specific configuration in which the power supply device 110 determines the class of the power consumption device 120 based on the class sensing current and provides the driving power to the power consumption device 120 is described in a related standard such as IEEE 802.3af As it is widely known, detailed explanation is omitted.

In one embodiment, the power supply 110 may be one of a variety of devices including a power supply module such as an Ethernet switch, a router, a hub, May be one of various devices supporting IEEE 802.3af such as a wireless access point, a bluetooth access point, a Voice over Internet Protocol (VoIP) phone, and a network camera. At least one additional device (for example, first and second additional devices 131 and 132) may be configured to provide various additional functions such as a DMB (Digital Multimedia Broadcast) function to the power consumption device 120 Lt; / RTI > For example, the additional device may be one of a DMB module device, a USB (Universal Serial Bus) module device, an HSDPA (High Speed Downlink Packet Access) module device, and an expansion module device having a LCD (Liquid Crystal Display) display.

Hereinafter, the specific configuration and functions of the power consumption device 120 and the additional devices 131 and 132 shown in FIG. 1 will be described in detail.

FIG. 2 is a block diagram of a power consumption apparatus according to an embodiment of the present invention, FIG. 3 is a block diagram showing a configuration of an additional apparatus according to an embodiment of the present invention, FIG. And an electrical connection relationship between the first class resistance of the device and the second class resistors of the additional devices.

2, the power consumption device 120 may include an additional device connection 210, a control unit 220, a PoE power supply 230, an auxiliary power supply 240, and a first class resistance 250 have.

The additional device connection unit 210 is configured to be electrically connected to at least one additional device (e.g., the first and second additional devices 131 and 132) including the second class resistors 320 and 420, respectively . The additional device connection unit 210 may be configured such that each of the second class resistors 320 and 420 of the additional devices connected to the additional device connection unit 210 is electrically connected in parallel with the first class resistor 250. [ Lt; / RTI > For example, the additional device connection unit 210 may include a plurality of ports each of which the first and second additional devices 131 and 132 can connect to, a second class resistance of the first and second additional devices 131 and 132, And a plurality of signal lines arranged in parallel with the first class resistor 250 through the plurality of ports. In addition, the additional device connection unit 210 may form an additional device connection signal when at least one additional device is connected. The specific configuration (for example, the number and arrangement of ports and signal lines) of the additional device connection unit 210 is not limited to the above-described embodiment, and those skilled in the art can easily design or change it according to the respective embodiments And detailed description thereof will be omitted.

The control unit 220 is connected to the Ethernet cable EC and receives the class sensing voltage from the power supply unit 110 connected to the Ethernet cable EC to receive the first class resistance 250 and / To the second class resistors 320 and 420 of the additional devices 131 and 132, respectively. When the control unit 220 receives the additional device connection signal from the additional device connection unit 210, the control unit 220 causes the auxiliary power supply unit 240 to supply the additional devices connected to the power consumption device 120 and the additional device connection unit 210 131 and 132 and controls the PoE power supply unit 230 to stop supplying the driving power supplied to the power consumption device 120. [ When the supply of driving power to the power consumption device 120 is stopped, the controller 220 controls the first class resistance 250 as well as the additional devices 131 and 132 connected to the additional device connection unit 210 The class of the power consumption device 120 is determined in consideration of the second class resistance 320 and 420 of the power consumption device 120 and the PoE power supply 230 supplies the driving power of the size corresponding to the newly determined class to the power consumption device 120. [ And for the additional devices connected to the additional device connection unit 210, respectively. The control unit 220 controls the power supply unit 120 and the additional devices 131 and 132 connected to the additional device connection unit 210 such that the PoE power supply unit 230 supplies driving power having a size corresponding to the newly determined class It is possible to control the auxiliary power supply unit 240 to stop the power supply to each of the additional devices connected to the power consumption device 120 and the additional device connection unit 210. [

The PoE power supply unit 230 can stop the supply of the driving power supplied to the power consumption device 120 under the control of the control unit 220. When the additional devices are connected through the additional device connection unit 210, Driving power having a size corresponding to the class of the power consumption apparatus 120 can be provided for each of the additional apparatuses 131 and 132 connected to the power consumption apparatus 120 and the additional apparatus connection unit 210. [ In one embodiment, the PoE power supply unit 230 is connected to the power consumption device 120 and / or the additional device connection unit 210 via the Ethernet cable EC from the power supply unit 110 And supplies the power to each of the additional devices connected to the power consumption device 120 and / or the additional device connection unit 210. [

The auxiliary power supply unit 240 is connected to the power consumption device 120 and the additional devices connected to the additional device connection unit 210 when the additional devices are connected through the additional device connection unit 210 under the control of the control unit 220. [ The PoE power supply unit 230 supplies driving power having a size corresponding to the newly determined class to the power consumption device 120 and the additional devices connected to the additional device connection unit 210 The auxiliary power supply unit 240 can stop the power supply to each of the additional devices connected to the power consumption device 120 and the additional device connection unit 210. [ In one embodiment, the auxiliary power supply 240 receives power from the power supply 110 through a signal line (not shown) provided separately from the Ethernet cable EC, It is possible to supply the minimum power necessary for the operation of each of the additional devices connected to the device connection unit 210. [ The auxiliary power supply 240 may receive power from a power supply (not shown) (for example, a battery) provided separately from the power supply 110, And the additional devices connected to the additional device connection unit 210, respectively.

The first class resistor 250 may have a predetermined resistance value and may be configured to generate a class sense current of a predetermined magnitude in response to the class sense voltage applied from the power supply 110. [ In one embodiment, the first class resistor 250 is configured to provide a class sense current of a magnitude corresponding to the level of power required to drive only the power consuming device 120 upon application of a class sense voltage of a predetermined magnitude, Can be set. For example, if the power consumption device 120 is a Class 2 device requiring less than 7.0 W of power to drive only that device and the magnitude of the class sense current representing Class 2 is in the range of 16 mA to 21 mA, When the class sensing voltage is 18V, the first class resistance 250 can be set to 857? (= 18V / 21mA) to 1125? (= 18V / 16mA).

In one embodiment, when at least one additional device is connected to the additional device connection unit 210, the first class resistor 250 is connected to the second class resistance of each of the connected at least one additional device in parallel In this case, when the class sensing voltage is applied from the power supply 110, the class sensing currents of the sizes corresponding to the equivalent resistance values of the first class resistance 250 and the second class resistance 320, Can be generated. When one or more second class resistors 320 and 340 are connected in parallel to the first class resistor 250, the equivalent resistance value becomes smaller than the resistance value of the first class resistor 250, When the sensing voltage is applied, a class sensing current having a larger magnitude than that when the second class resistors 320 and 340 are not connected is generated. In this case, the power supply 110 senses a larger class sensing current, and a corresponding level of driving power can be provided to the power consumption device 120 and the additional devices connected thereto .

3, the first additional device 131 may include a PD connection unit 310 and a second class resistance 320. [

The PD connection 310 may be configured to connect to the power dissipation device 120 and to couple the second class resistance 320 electrically in parallel with the first class resistor 250 of the power dissipation device 120 . The PD connection unit 310 electrically connects at least one port and the second class resistor 320 to the additional device connection unit 210 of the power consumption device 120 to the additional device connection unit 210. [ One or more signal lines. The specific configuration (for example, the number and arrangement of ports and signal lines) of the PD connection unit 310 may vary according to each embodiment of the first supplemental device 131, and it will be clear to those skilled in the art, And can be implemented by appropriately designing and / or modifying it according to the present invention, and a detailed description thereof will be omitted.

The second class resistance 320 is configured to generate a class sense current of a predetermined magnitude in response to the class sense voltage applied to the power consumption device 120 together with the first class resistance 250 of the power consumption device 120 . In one embodiment, the second class resistance 320 may be configured to have a resistance value that is less than the first class resistance 250. The second class resistor 320 may be connected between the power supply device 120 and the first additional device 131 in response to the application of a class sense voltage of a predetermined magnitude to the power consumption device 120. [ The resistance value can be set so as to generate the class sensing current of the size corresponding to the level. For example, when the power consumption device 120 and the first additional device 131 are connected, a class 0 device requiring 15.4 W or less of power is formed, and the class sense current indicating class 0 is 0 mA to 5 mA , The equivalent resistance value formed by the first class resistance 250 and the second class resistance 320 is equal to or more than 3600? (= 18 V / 5 mA) when the applied class sense voltage is 18 V The class resistance 250 and the second class resistance 320 can be set.

4, when the first and second additional devices 131 and 132 are connected to the power consumption device 120, the first class resistance 250 of the power consumption device 120, The second class resistors 320 and 420 of the second additional devices 131 and 132 are electrically connected in parallel to form one equivalent resistance electrically. The resistance value of the upper equivalent resistance becomes smaller each time a new additional device is connected to the power consumption device 120. When the class sensing voltage is applied to the control device 220, A large class sensing current is generated. Accordingly, the power supply device 110 senses a larger class sensing current, and supplies driving power corresponding to the required driving power level to the power consumption device 120 and the connected It is possible to provide for additional devices.

5 is a flowchart illustrating a procedure of a PoE class setting method according to an embodiment of the present invention.

As shown in FIG. 5, the additional device connection unit 210 included in the power consumption device 120 may periodically determine whether the additional device is connected (S510). As a result of the determination, when the additional devices 131 and 132 are connected to the power consumption device 120, an additional device connection signal can be formed. The control unit 220 controls the auxiliary power supply unit 240 to operate each of the additional devices 131 and 132 connected to the power consumption device 120 and the additional device connection unit 210 (S520), and controls the PoE power supply unit 230 to cut off the supply of driving power to the power consuming apparatus 120 (S530). When the supply of the driving power supplied to the power consumption device 120 is interrupted, the control unit 220 not only controls the first class resistance 250 but also the additional devices 131 and 132 connected to the additional device connection unit 210, The class of the power consuming device 120 is determined in consideration of each second class resistance at step S540 and the PoE power supply 230 supplies the driving power having the size corresponding to the newly determined class to the power consuming device 120 and / To provide the additional devices 131 and 132 connected to the additional device connection unit 210 (S550). The control unit 220 controls the power supply unit 120 and the additional devices 131 and 132 connected to the additional device connection unit 210 such that the PoE power supply unit 230 supplies driving power having a size corresponding to the newly determined class The auxiliary power supply 240 can control the auxiliary power supply 240 to cut off the auxiliary power supplied to each of the additional devices 131 and 132 connected to the power consumption device 120 and the additional device connection part 210 (S560).

Although the method has been described through particular embodiments, the method may also be implemented as computer readable code on a computer readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. Examples of the computer-readable recording medium include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, and may be implemented in the form of a carrier wave (for example, transmission over the Internet) . In addition, the computer-readable recording medium may be distributed over network-connected computer systems so that computer readable codes can be stored and executed in a distributed manner. In addition, functional programs, codes, and code segments for implementing the above embodiments can be easily deduced by programmers of the present invention.

Although the present invention has been described in connection with certain embodiments thereof, it should be understood that various changes and modifications may be made therein without departing from the spirit and scope of the invention as will be apparent to those skilled in the art to which the invention pertains. something to do. It is also contemplated that such variations and modifications are within the scope of the claims appended hereto.

100: PoE system 110: power supply
120: power consumption device 131, 132: additional device
210: additional device connection unit 220:
230: PoE power supply unit 240: Auxiliary power supply unit
250: first class resistor 310: PD connection
320: second class resistance 420: second class resistance

Claims (12)

A PoE class setting device included in a power consumption device,
A PoE power supply for supplying driving power,
A first class resistance having a predetermined resistance value,
And a control unit connected to the PoE power supply unit and the first class resistance and controlling supply of the driving power,
Wherein the control unit supplies an auxiliary power required for operation of the power consumption device and the at least one additional device when at least one additional device each including a second class resistance is connected to the power consumption device, A PoE class setting device for shutting off the supply of power. The method according to claim 1,
Wherein the control unit resets the class of the power consuming device in consideration of the resistance value of the first class resistance and the second class resistance. The method according to claim 1,
Wherein the PoE class setting device further includes an additional device connection unit that periodically determines whether or not the at least one additional device is connected. The method according to claim 1,
Further comprising an auxiliary power supply for supplying the auxiliary power. The method according to claim 1,
Wherein the first class resistance and the second class resistance are connected in parallel. 5. The method of claim 4,
Wherein the auxiliary power supply unit includes:
A PoE class which receives power from an external power supply equipment through a signal line provided separately from an Ethernet cable and supplies the auxiliary power to the power consumption device and the at least one additional device, Setting device. 5. The method of claim 4,
Wherein the auxiliary power supply unit includes:
And supplies the auxiliary power to the power consumption device and the at least one additional device by receiving power from a battery provided separately from the external power supply device. A PoE class setting method for setting a PoE class of a power consumption device,
Periodically judging whether or not at least one additional apparatus is connected;
Supplying auxiliary power required for operation of said power consumption device and said at least one additional device when said at least one additional device is connected to said powered device;
Interrupting supply of driving power supplied to the power consumption device; And
Determining a class of the power consuming device in consideration of a resistance value of a first class resistance of the power consumption device and a resistance value of a second class resistance of the at least one additional device. 9. The method of claim 8,
Providing driving power of a size corresponding to the determined class for each of the power consumption device and the at least one additional device; And
And stopping supply of the auxiliary power. 9. The method of claim 8,
Wherein the first class resistance and the second class resistance are connected in parallel. 9. The method of claim 8,
Wherein the step of supplying the sub-
A power supply unit for supplying power to the power consumption device and the at least one additional device from the power sourcing equipment connected to the power consumption device through a signal line provided separately from an Ethernet cable, And providing the PoE class. 9. The method of claim 8,
Wherein the step of supplying the sub-
And supplying the auxiliary power to the power consumption device and the at least one additional device by receiving power from a battery provided separately from the power supply device connected to the power consumption device.
KR1020140104211A 2014-08-12 2014-08-12 METHOD AND APPARATUS FOR SETTING OF PoE CLASS KR20160019659A (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130055568A (en) 2010-04-02 2013-05-28 앤드류 엘엘씨 Method and apparatus for distributing power over communication cabling

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130055568A (en) 2010-04-02 2013-05-28 앤드류 엘엘씨 Method and apparatus for distributing power over communication cabling

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