CN108429622B

CN108429622B - Reverse power supply method and device

Info

Publication number: CN108429622B
Application number: CN201710077874.0A
Authority: CN
Inventors: 唐荣道
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2017-02-14
Filing date: 2017-02-14
Publication date: 2022-04-29
Anticipated expiration: 2037-02-14
Also published as: CN108429622A; WO2018149325A1

Abstract

The invention discloses a reverse power supply method and a reverse power supply device. The method comprises, on the powered device side: establishing a management channel with the terminal equipment; detecting the power consumption state of the power receiving equipment in the process of receiving power supply of the terminal equipment; and interacting with the terminal equipment through the management channel to enable the terminal equipment to supply power to the powered equipment at the output power level corresponding to the state. The method comprises the following steps on the side of the terminal equipment: establishing a management channel with a powered device; in the process of supplying power to the powered device, the power is supplied to the powered device by interacting with the powered device through the management channel and supplying power to the powered device at an output power level corresponding to a power consumption state of the powered device. According to the invention, the powered device interacts with the terminal device through the management channel according to the power requirement, so that the output power of the power supply device at the terminal device side can meet the requirement of the powered device, and the power obtained by other access devices arbitrarily connected to the copper cable can be ensured not to be larger than the power threshold (15W), thereby meeting the safety requirement.

Description

Reverse power supply method and device

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for reverse power supply.

Background

In The prior art, an Optical Fiber and an Optical Network Unit (ONU) are deployed near a user home, and a deployment scene of a last several hundred meters apart from a copper cable access is called an Optical Fiber To distribution point (FTTDp), where Dp means a distribution point, which is an intersection point of a distribution line segment and a lead-in line of a conventional copper cable Network, and is also a last intersection point closest To a user in The Network. A Distribution Point Unit (DPU) Device has a requirement of Reverse Power supply (RPF), and needs a user side terminal Device (PSE) to provide Power to the DPU, where the DPU is used as a Powered Device (PD).

The Reverse Power supply of the DPU device is developed based on the standard of Power Over Ethernet (POE for short), and the standard Requirements such as ETSI TS 101548 (European Requirements for Reverse Power of Remote Access) need to be followed. As shown in FIG. 1, the standard borrows the requirements of IEC 60950-1 in terms of safety. The power sourcing equipment PSE providing reverse power supply is used as a Limited Power Source (LPS) device and in the case of Printed Circuit Board (PCB) material using V-1CLASS or above, the output power can be greater than 15W, whilst it must be ensured that any PCB material connected to the connector, component, assembly or device on the copper cable must meet the V-1CLASS or above. Any device that does not meet the above material requirements must draw less than 15W of power from the PSE. In the ETSI TS 101548 standard, several maximum allowable output power levels of the PSE are defined, such as SR2 maximum allowable output power of 15W and SR3 maximum allowable output power of 21W in the case of a power supply device with a maximum output voltage of 60V. Due to the unknown of the terminal user access equipment, all equipment accessed to a copper wire in a user home cannot meet the material requirements, and in order to ensure the safety requirements, the output power of the PSE can only meet the occasion (SR2 grade) smaller than 15W, which greatly limits the port density and application scenarios of the DPU of the powered equipment.

Disclosure of Invention

The invention provides a reverse power supply method and a reverse power supply device, which are used for solving the problem that the output power of power supply equipment can only meet the application scene of less than 15W in order to ensure the safety requirement due to the unknown of other access equipment except the power supply equipment.

In order to solve the technical problems, the invention solves the problems by the following technical scheme:

the invention provides a reverse power supply method, which is executed on a PD side of a powered device and comprises the following steps: establishing a management channel with the terminal equipment; detecting a state of power consumption of the power receiving device in a process of receiving power supply of the terminal device; and interacting with the terminal equipment through the management channel to enable the terminal equipment to supply power to the powered equipment at the output power level corresponding to the state.

Wherein the detecting a state in which the power receiving apparatus consumes power includes: detecting whether the absolute value of the difference value between the maximum allowable output power of the terminal equipment and the consumed power of the powered equipment is smaller than a preset power threshold value or not; the interacting with the terminal device through the management channel to enable the terminal device to supply power to the powered device at the output power level corresponding to the state includes: if the absolute value of the difference is smaller than the power threshold, sending a class switching request to the terminal equipment once every preset time period through the management channel, so that the terminal equipment supplies power to the powered equipment with the output power of the SR3 class according to the class switching request; and if the absolute value of the difference is larger than or equal to the power threshold, prohibiting transmitting the grade switching request to the terminal equipment, and enabling the terminal equipment to supply power to the powered equipment with the output power of the SR2 grade.

Wherein the detecting a state in which the power receiving apparatus consumes power includes: detecting whether the current supplied to the powered device by the terminal device is larger than a preset current threshold value; when the current is greater than the current threshold, the terminal device supplies power to the powered device with output power of SR3 level, and the absolute value of the difference between the maximum allowable output power of the terminal device and the consumed power of the powered device is smaller than a preset power threshold; the interacting with the terminal device through the management channel to enable the terminal device to supply power to the powered device at the output power level corresponding to the state includes: if the current is larger than the current threshold, sending a grade switching request to the terminal equipment once every preset time period through the management channel, so that the terminal equipment supplies power to the powered equipment at the output power of SR3 grade according to the grade switching request; and if the current is less than or equal to the current threshold, prohibiting the grade switching request from being sent to the terminal equipment, so that the terminal equipment can supply power to the powered equipment with the output power of the SR2 grade.

Wherein, the establishing of the management channel with the terminal device includes: establishing a management channel between a PD chip of the powered device and a PSE chip of Power Supply Equipment (PSE) in the terminal equipment; or, the central processing unit CPU of the powered device establishes a management channel with the CPU of the terminal device through a digital subscriber line DSL link.

Wherein, the interacting with the terminal device through the management channel comprises: enabling the PD chip of the powered device to send a grade switching request to the PSE chip of the power supply device every other preset time period through the management channel; or, the CPU of the powered device sends a class switching request to the CPU of the terminal device every preset time period through the management channel.

The invention provides a reverse power supply method, which is executed on a terminal device side and comprises the following steps: establishing a management channel with a powered device; and in the process of supplying power to the powered device, interacting with the powered device through the management channel, and supplying power to the powered device by using the output power level corresponding to the power consumption state of the powered device.

Wherein, the interacting with the powered device through the management channel and supplying power to the powered device at an output power level corresponding to a state of power consumption by the powered device include: if a grade switching request sent by the powered device is received, the powered device is powered by output power of an SR3 grade; and if the grade switching request sent by the powered device is not received within the preset time length, the powered device is powered by the output power of the SR2 grade.

Wherein, establish the management passageway with the powered device includes: establishing a management channel between a PSE chip of power supply equipment in the terminal equipment and a PD chip of the powered equipment; or, the central processing unit CPU of the terminal device and the CPU of the powered device establish a management channel through a DSL link.

Wherein the interacting with the powered device through the management channel comprises: enabling a PSE chip of power supply equipment in the terminal equipment to receive a grade switching request sent by a PD chip in the powered equipment through the management channel; or, the CPU of the terminal device is caused to receive, via the management channel, a class switching request sent by the CPU of the powered device.

The invention provides a reverse power supply device, which is arranged on the PD side of a powered device and comprises: the first establishing module is used for establishing a management channel with the terminal equipment; the detection module is used for detecting the power consumption state of the power receiving equipment in the process of receiving power supply of the terminal equipment; and the first interaction module is used for interacting with the terminal equipment through the management channel so that the terminal equipment supplies power to the powered equipment at the output power level corresponding to the state.

The detection module is configured to detect whether an absolute value of a difference between a maximum allowed output power of the terminal device and a consumed power of the powered device is smaller than a preset power threshold; the first interaction module is configured to: if the absolute value of the difference is smaller than the power threshold, sending a class switching request to the terminal equipment once every preset time period through the management channel, so that the terminal equipment supplies power to the powered equipment with the output power of the SR3 class according to the class switching request; and if the absolute value of the difference is larger than or equal to the power threshold, prohibiting transmitting the grade switching request to the terminal equipment, and enabling the terminal equipment to supply power to the powered equipment with the output power of the SR2 grade.

The detection module is configured to detect whether a current supplied to the powered device by the terminal device is greater than a preset current threshold; when the current is greater than the current threshold, the terminal device supplies power to the powered device with output power of SR3 level, and the absolute value of the difference between the maximum allowable output power of the terminal device and the consumed power of the powered device is smaller than a preset power threshold; the first interaction module is configured to: if the current is larger than the current threshold, sending a grade switching request to the terminal equipment once every preset time period through the management channel, so that the terminal equipment supplies power to the powered equipment at the output power of SR3 grade according to the grade switching request; and if the current is less than or equal to the current threshold, prohibiting the grade switching request from being sent to the terminal equipment, so that the terminal equipment can supply power to the powered equipment with the output power of the SR2 grade.

Wherein the first establishing module is configured to: establishing a management channel between a PD chip of the powered device and a PSE chip of Power Supply Equipment (PSE) in the terminal equipment; or, the central processing unit CPU of the powered device establishes a management channel with the CPU of the terminal device through a digital subscriber line DSL link.

Wherein the first interaction module is configured to: enabling the PD chip of the powered device to send a grade switching request to the PSE chip of the power supply device every other preset time period through the management channel; or, the CPU of the powered device sends a class switching request to the CPU of the terminal device every preset time period through the management channel.

The invention provides a reverse power supply device, which is arranged on a terminal device side and comprises: the second establishing module is used for establishing a management channel with the powered device; the second interaction module is used for interacting with the powered device through the management channel in the process of supplying power to the powered device; and the power supply module is used for supplying power to the powered device according to the output power level corresponding to the power consumption state of the powered device.

Wherein if the second interaction module receives a class switching request sent by the powered device, the power supply module supplies power to the powered device with an output power of an SR3 class; if the second interaction module does not receive the class switching request sent by the powered device within a preset time length, the power supply module supplies power to the powered device with the output power of the SR2 class.

Wherein the second establishing module is configured to: establishing a management channel between a PSE chip of power supply equipment in the terminal equipment and a PD chip of the powered equipment; or, the central processing unit CPU of the terminal device and the CPU of the powered device establish a management channel through a DSL link.

Wherein the second interaction module is configured to: enabling a PSE chip of power supply equipment in the terminal equipment to receive a grade switching request sent by a PD chip in the powered equipment through the management channel; or, the CPU of the terminal device is caused to receive, via the management channel, a class switching request sent by the CPU of the powered device.

The invention has the following beneficial effects:

the invention can meet the requirement of safety regulation under the condition of reverse power supply, the power receiving equipment interacts with the terminal equipment through the management channel according to the power requirement, so that the power supply equipment at the side of the terminal equipment adjusts the output power grade, the output power of the power supply equipment can meet the requirement of the power receiving equipment, and the power obtained by other access equipment arbitrarily connected to the copper cable can be ensured not to be greater than the power threshold (15W), thereby meeting the safety problem required by related standards.

Drawings

FIG. 1 is a schematic diagram of a conventional reverse power supply architecture;

fig. 2 is a flowchart of a reverse power supply method according to a first embodiment of the present invention;

fig. 3 is a flowchart of a reverse power supply method according to a second embodiment of the present invention;

fig. 4 is a flowchart of a reverse power supply method according to a third embodiment of the present invention;

fig. 5 is a schematic diagram of a reverse power supply method according to a third embodiment of the present invention;

FIG. 6 is a logic diagram of a reverse power method according to a third embodiment of the present invention;

fig. 7 is a flowchart of a reverse power supply method according to a fourth embodiment of the present invention;

fig. 8 is a schematic diagram of a reverse power supply method according to a fourth embodiment of the present invention;

FIG. 9 is a logic diagram of a reverse power method according to a fourth embodiment of the present invention;

fig. 10 is a structural view of a reverse power supplying apparatus according to a fifth embodiment of the present invention;

fig. 11 is a structural view of a reverse power supplying apparatus according to a sixth embodiment of the present invention.

Detailed Description

The present invention will be described in further detail below with reference to the drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.

Example one

The present embodiment provides a reverse power supply method performed on the powered device side. Fig. 2 is a flowchart of a reverse power supply method according to a first embodiment of the present invention.

Step S210, a management channel is established with the terminal device.

The management channel is used for enabling the powered device to interact with a terminal device which supplies power to the powered device. The terminal equipment can supply power to the powered equipment through a copper wire (copper cable), and the powered equipment can enable the terminal equipment to adjust the output power level through a management channel.

In this embodiment, the powered device may be a distribution point unit DPU. The terminal equipment comprises power supply equipment PSE for supplying power to the DPU. Further, a PD chip of the powered device and a PSE chip of a power supply device in the terminal device are enabled to establish a management channel; or, a Central Processing Unit (CPU) of the powered device establishes a management channel with the CPU of the terminal device through a Digital Subscriber Line (DSL).

In step S220, the power consumption state of the power receiving apparatus is detected while power supply to the terminal apparatus is being received.

The power consumed by the powered device is the actual power supplied by the terminal device to the powered device.

The state of power consumption of the power receiving apparatus corresponds to the output power level of the terminal apparatus (power supply apparatus) required by the power receiving apparatus.

In the ETSI TS 101548 standard, the SR2 level is a safety level, and the output power of the SR2 level does not damage abnormal access devices (unknown access devices) on a copper wire.

And step S230, interacting with the terminal equipment through the management channel, and enabling the terminal equipment to supply power to the powered equipment at the output power level corresponding to the state.

For example: in the scenario of single-port power supply, the powered device needs the output power of the terminal device to be greater than the SR2 level, and at this time, the powered device may interact with the terminal device, so that the terminal device switches the output power level to the SR3 level greater than the SR2 level.

For interacting with a terminal device through a management channel, the method comprises the following steps: according to different management channel paths, a PD chip of the powered device sends a grade switching request to a PSE chip of the power supply device at intervals of a preset time period through a management channel; or, the CPU of the powered device sends a class switching request to the CPU of the terminal device every preset time period through the management channel. The class switching request is used to request that the terminal device be powered using output power at the SR3 level.

For detecting the state of the power consumed by the powered device and interacting with the terminal device through the management channel to enable the terminal device to supply power to the powered device at the output power level corresponding to the state, the following two execution modes are provided:

detecting whether the absolute value of the difference value between the maximum allowable output power of the terminal equipment and the consumed power of the powered equipment is smaller than a preset power threshold value; if the absolute value of the difference is smaller than the power threshold, sending a grade switching request to the terminal equipment once every preset time period through the management channel, so that the terminal equipment supplies power to the powered equipment by the output power of SR3 grade according to the grade switching request; and if the absolute value of the difference is larger than or equal to the power threshold, prohibiting transmitting the grade switching request to the terminal equipment, and enabling the terminal equipment to supply power to the powered equipment with the output power of the SR2 grade.

Detecting whether the current supplied to the powered device by the terminal device is larger than a preset current threshold value; when the current is greater than the current threshold, the terminal device supplies power to the powered device with output power of SR3 level, and the absolute value of the difference between the maximum allowable output power of the terminal device and the consumed power of the powered device is smaller than a preset power threshold; if the current is larger than the current threshold, sending a grade switching request to the terminal equipment once every preset time period through the management channel, so that the terminal equipment supplies power to the powered equipment at the output power of SR3 grade according to the grade switching request; and if the current is less than or equal to the current threshold, prohibiting the grade switching request from being sent to the terminal equipment, so that the terminal equipment can supply power to the powered equipment with the output power of the SR2 grade.

It will be appreciated by those skilled in the art that a request to supply power using an output power of the SR2 class may also be sent to the terminal device via the management channel if the absolute value of the difference is equal to or greater than the power threshold, or if the current is equal to or less than the current threshold.

In order to ensure that the power consumption obtained by the abnormal access device is not greater than 15W, the preset power threshold may be set to 15W, and the preset current threshold may be set to 0.1A, where the maximum output voltage is 60V, the maximum allowable output powers of the SR2 class and the SR3 class are 15W and 21W, respectively, according to the ETSI TS 101548 standard, and the current threshold may be (21W-15W)/60V — 0.1A.

The embodiment can meet the requirement of safety regulation under the condition of reverse power supply, the powered device interacts with the terminal device through the management channel according to the power requirement, so that the terminal device adjusts the output power level, the output power of the terminal device can meet the requirement of the powered device, and the power obtained by other access devices which are randomly connected to the copper cable can be ensured not to be greater than a power threshold (15W), thereby meeting the safety problem required by related standards.

Example two

The present embodiment provides a reverse power supply method performed on the terminal device side. Fig. 3 is a flowchart of a reverse power supply method according to a second embodiment of the present invention. The terminal device includes a power supply device that supplies power to a power receiving device.

In step S310, a management channel is established with the powered device.

In this embodiment, the powered device may be a distribution point unit DPU. The terminal equipment comprises power supply equipment PSE for supplying power to the DPU. Further, a management channel is established between a PSE chip of power supply equipment and a PD chip of powered equipment in the terminal equipment; alternatively, the CPU of the terminal device and the CPU of the powered device are caused to establish a management channel over the digital subscriber line DSL link.

Step S320, in the process of supplying power to the powered device, interacting with the powered device through the management channel, and supplying power to the powered device at an output power level corresponding to the power consumption state of the powered device.

Receiving a class switching request sent by a powered device through a management channel; if receiving the grade switching request sent by the powered device, the power consumption state of the powered device corresponds to the output power of the SR3 grade, and the power is supplied to the powered device by the output power of the SR3 grade; if the grade switching request sent by the powered device is not received within the preset time length, the power consumption state of the powered device corresponds to the output power of the SR2 grade, and the power is supplied to the powered device by the output power of the SR2 grade.

For example: and when the time for which the next grade switching request is not received reaches the preset time length since the last time the grade switching request is received, switching the grade of the output power from the SR3 grade to the SR2 grade.

Further, a PSE chip of power supply equipment in the terminal equipment receives a grade switching request sent by a PD chip of the powered equipment through a management channel; alternatively, the CPU of the terminal device is caused to receive a rank switching request transmitted from the CPU of the power receiving device via the management channel.

The invention can meet the requirement of safety regulation under the condition of reverse power supply, the powered device interacts with the terminal device through the management channel according to the power requirement, so that the terminal device adjusts the output power grade, the output power of the terminal device can meet the requirement of the powered device, and the power obtained by other access devices arbitrarily connected to the copper cable can be ensured not to be greater than the power threshold (15W), thereby meeting the safety problem required by related standards.

The reverse power supply method of the present invention is further described below by taking a distribution point unit DPU and a terminal device including an xDSL subscriber terminal device (CPE for short) and a power supply device PSE as an example. Among them, xDSL is a generic name of each type of DSL. The PSE and CPE may be in a split form or an integrated form.

EXAMPLE III

The present embodiment provides a more specific reverse power supply method. In this embodiment, the PSE and CPE are in a split form. Fig. 4 is a flowchart of a reverse power supply method according to a third embodiment of the present invention, fig. 5 is a schematic diagram of the reverse power supply method according to the third embodiment of the present invention, and fig. 6 is a logic schematic diagram of the reverse power supply method according to the third embodiment of the present invention.

In step S410, the PSE supplies power to the DPU according to the output power of SR2 level required when the DPU is initially powered on.

The PD chips at each office port of the DPU are preprogrammed to SR2 level. The plurality of PD chips, each serving as a PD controller and connected to a different terminal device, perform the same operation, and in the present embodiment, only one of the PD chips will be described.

The PSE interacts with the DPU according to a handshake protocol, the output power grade required by the DPU during initial power-on can be known through the interactive PSE, electric energy is output according to the output power grade required by the DPU, and power is supplied to the DPU.

In the embodiment, since the output power at the SR2 level is the output power at the safety level, the output power at the SR2 level is used to power the DPU at the initial power-on of the DPU.

At step S420, the DPU accepts the PSE to supply power at the SR2 level.

In step S430, the DPU starts only the CPU minimal system, and the PD chip of the DPU establishes a management channel with the PSE chip of the PSE.

The path of the management channel sequentially comprises: PD chip of DPU ← → power separator on DPU side ← → copper wire ← → power separator on PSE side ← → PSE chip of PSE. The management channel is an AC coupling channel.

Step S440, the PD chip detects whether the current supplied by the PSE to the DPU is larger than a current threshold value; if yes, go to step S450; if not, go to step S480.

The fact that the PSE supplies a current to the DPU that is greater than the current threshold Iswitch ensures that the absolute value of the difference between the maximum allowed output power of the PSE and the actual power supplied to the DPU is less than 15W in the case where the PSE supplies power to the DPU at a level of SR 3.

When the current supplied by the PSE TO the DPU is greater than the current threshold, a power detection unit in the PD chip generates a SWITCH TO SR3 ENABLE signal (Power dynamic switching ENABLE signal).

Step S450, the PD chip sends a grade switching request to the PSE chip at regular time through the management channel.

The rank switch request is a pulse signal. The pulse signal may be referred TO as a SWITCH TO SR3 request pulse (power dynamic switching request pulse). If the SWITCH TO SR3 ENABLE signal is active, the class SWITCH request transmitter is timed TO output a SWITCH TO SR3 request pulse TO the PSE chip over the management channel. The time interval of the timing transmission can be set according to actual requirements, for example, the timing transmission is transmitted once every 2 s.

The pulse signal may be a single-Frequency pulse, or may be a Frequency-shift keying (FSK) pulse signal composed of two Frequency points. The frequency range of the pulsed signal should not affect analog broadband signals such as DSL. For example: the pulse signal is below 25KHz frequency point.

Step S460, after receiving the class switching request, the PSE chip supplies power to the PDU with the output power of SR3 class, and returns a response message to the PD chip through the management channel.

After receiving the grade switch request of the PD, the grade switch request receiver in the PSE chip sets the output current limit point in the power grade register to be in SR3 grade so as to supply the PDU with the output power in SR3 grade, and then the grade switch request receiver returns a response message to the PD chip side through the management channel.

In step S470, after the PD chip receives the response message returned by the PSE chip of the PSE, the DPU starts other modules.

Certainly, the PSE chip may not return a response message to the PD chip, and the DP chip waits for a predetermined time after sending the class switching request to the PSE chip, and then starts other modules, so that the DPU starts to operate normally. The length of time of the predetermined length of time may ensure that the PSE completes the power class switch. Other modules of the DPU startup include: and the service switching module, the uplink service module and the like.

In step S480, the PD chip of the DPU prohibits sending the class switching request to the PSE.

In step S490, if the PSE chip does not receive the class switching request sent by the PD chip within the preset time period, the DPU is powered by the output power of SR2 class.

In the process that the PD chip sends the grade switching request to the PSE chip at regular time, if the fact that the current supplied by the PSE to the DPU is smaller than or equal to the current threshold Iswitch is detected, the grade switching request is stopped being sent to the PSE chip, the PSE chip reaches the preset time length from the last time of receiving the grade switching request, the output current limiting point is recovered to be in the SR2 grade, so that the output power in the SR2 grade is used for supplying power to the PDU, and therefore the power consumption obtained by abnormal access equipment is guaranteed not to be larger than 15W.

Under the condition that a plurality of terminal devices simultaneously supply power to the DPU, each terminal device is connected with one PD chip, each PD chip and each terminal device establish one management channel, and each PD chip can interact with the corresponding terminal device through the corresponding management channel to adjust the output power level.

It should be appreciated by those skilled in the art that the present embodiment is applicable to dynamic power adjustment between any power supplying device and powered device in the case of reverse power supply, and is not limited only to the case where the powered device is a DPU device.

Example four

The present embodiment provides another specific reverse power supply method. In this embodiment, the PSE and the CPE are in the form of an integrated body. Of course, the PSE and CPE in the form of a complex may also be reversely powered in the manner of the fourth embodiment. Fig. 7 is a flowchart of a reverse power supply method according to a fourth embodiment of the present invention, fig. 8 is a schematic diagram of the reverse power supply method according to the fourth embodiment of the present invention, and fig. 9 is a logic schematic diagram of the reverse power supply method according to the fourth embodiment of the present invention.

In step S710, the PSE supplies power to the DPU according to the output power of SR2 level required when the DPU is initially powered on.

The PD chips at each office port of the DPU are preprogrammed to SR2 level. Each office port can be connected to a power supply device of a terminal device, and fig. 8 shows two power supply devices.

The PSE interacts with the DPU according to a handshake protocol, the power output grade required by the DPU during initial power-on can be known through the interactive PSE, and electric energy is output according to the power output grade required by the DPU.

In this embodiment, except for transmitting g.fast broadband signals on copper wires, each office port of the DPU provides reverse power to the DPU by the PSE on the terminal device side, and the reverse power of each office port generates a DC power required by the DPU through current sharing and DC/DC conversion.

At step S720, the DPU receives power from the PSE at the SR2 level.

In step S730, the DPU starts only the CPU minimum system, and the CPU of the DPU and the CPU of the CPE establish a management channel.

The path of the management channel sequentially comprises: CPU ← → DSL office side chip (XTU-O module) ← → U-O interface ← → copper wire ← → U-R interface ← → DSL user side chip (XTU-R) → CPU on CPE side. The management channel is a DSL link. The CPU on the CPE side may control the PSE.

Step S740, the CPU of the DPU detects whether the current supplied by the PSE to the DPU is larger than a current threshold value; if yes, go to step S750; if not, go to step S780.

In step S750, the CPU of the DPU periodically transmits a class switching request to the CPU of the CPE through the management channel.

In step S760, after receiving the class switching request, the CPU of the CPE controls the PSE to supply power to the DPU with the output power of SR3 class, and returns a response message to the CPU of the DPU through the management channel.

The CPU of the CPE configures a power classification register (CLASS MODE register) corresponding to the PSE chip, and sets an output power current limiting point to be in an SR3 grade, so that the PSE supplies power to the DPU by using the power in an SR3 grade.

In step S770, after receiving the response message returned by the CPU of the CPE, the CPU of the DPU starts other modules.

The method comprises the steps that a CPU in DPU equipment detects the power supply condition of a PSE to the DPU, in the scene that only single port power supply and the like need the PSE output power to be larger than SR2 grades, after a DSL link corresponding to a local side port is enabled to be established, the CPU sends a grade switching request through XTU-O, after the CPU of the CPE extracts the grade switching request, a power classification register corresponding to a PSE chip is configured, an output power current limiting point is set to be SR3 grades, a response message is sent to the DPU, after the CPU of the DPU equipment receives the response message sent by the CPE, modules of service switching, uplink service and the like are started, and the equipment starts to work normally.

In step S780, the CPU of the DPU prohibits the transmission of the class switching request to the CPU of the CPE.

When a plurality of terminal devices simultaneously supply power to the DPU, the output power grade can use SR2 grade, and then the DPU can request the CPE to restore the output power grade of the PSE to SR2 grade through a management channel, for example, a CPU of the CPE configures a power classification register corresponding to a PSE chip, and sets an output power current limit point to SR2 grade.

In step S790, if the CPU of the DPU does not receive the level switching request sent by the CPU of the CPE within the preset time length, the CPU is powered by the output power of SR2 level.

If the CPU of the DPU stops sending the grade switching request to the CPU of the CPE, or the DSL is broken, or the interaction between XTU-O and XTU-R can not be initialized within a preset time interval, the CPU of the CPE immediately configures the output current limit point of the PSE to recover to the SR2 grade, thereby ensuring that the power consumption obtained by the abnormal access equipment is not more than 15W.

In this embodiment, the CPU of the DPU device sends a class switching request to the corresponding xDSL user interface, and the CPE configures the maximum power limit point of the PSE by communicating with the CPE through a copper wire.

According to the invention, a management channel is established between the DPU equipment and the user terminal equipment, the maximum power limit point output by the PSE is coordinated according to different power consumption states of different stages, activated port numbers and the like of the DPU equipment, the maximum allowable output power of the PSE and the power consumption of the DPU equipment are ensured to be less than 15W, once the power consumption of abnormal access equipment on a copper wire exceeds 15W, the total power output of the PSE exceeds the maximum power limit, the PSE conforming to the characteristics of the LPS can carry out current limiting or output switching-off, and the power consumption obtained by the abnormal access equipment is ensured not to be more than 15W.

EXAMPLE five

The present embodiment provides a reverse power feeding apparatus provided on a power receiving device side. Fig. 10 is a structural view of a reverse power supplying apparatus according to a fifth embodiment of the present invention.

This reverse power supply device provided on the power receiving apparatus side includes:

a first establishing module 1010, configured to establish a management channel with a terminal device.

A detecting module 1020, configured to detect a power consumption state of the powered device in a process of receiving power supply from the terminal device.

A first interaction module 1030, configured to interact with the terminal device through the management channel, so that the terminal device supplies power to the powered device at an output power level corresponding to the state.

Further, the detecting module 1020 is configured to detect whether an absolute value of a difference between the maximum allowed output power of the terminal device and the consumed power of the powered device is smaller than a preset power threshold. The first interaction module 1030, configured to send a class switching request to the terminal device every preset time period through the management channel if the absolute value of the difference is smaller than the power threshold, so that the terminal device supplies power to the powered device with output power of SR3 class according to the class switching request; and if the absolute value of the difference is larger than or equal to the power threshold, prohibiting transmitting the grade switching request to the terminal equipment, and enabling the terminal equipment to supply power to the powered equipment with the output power of the SR2 grade.

Further, the detecting module 1020 is configured to detect whether the current supplied to the powered device by the terminal device is greater than a preset current threshold; when the current is greater than the current threshold, the terminal device supplies power to the powered device with output power of SR3 level, and the absolute value of the difference between the maximum allowable output power of the terminal device and the consumed power of the powered device is smaller than a preset power threshold. The first interaction module 1030, configured to send a class switching request to the terminal device every preset time period through the management channel if the current is greater than the current threshold, so that the terminal device supplies power to the powered device with an output power of SR3 class according to the class switching request; and if the current is less than or equal to the current threshold, prohibiting the grade switching request from being sent to the terminal equipment, so that the terminal equipment can supply power to the powered equipment with the output power of the SR2 grade.

Further, the first establishing module 1010 is configured to enable a PD chip of the powered device to establish a management channel with a PSE chip of a power supply device located in the terminal device; or, the central processing unit CPU of the powered device establishes a management channel with the CPU of the terminal device through a digital subscriber line DSL link.

Further, the first interaction module 1020 is configured to enable a PD chip of the powered device to send a class switching request to a PSE chip of the power supply device every preset time period through the management channel; or, the CPU of the powered device sends a class switching request to the CPU of the terminal device every preset time period through the management channel.

The functions of the apparatus in this embodiment have been described in the above method embodiments, so that reference may be made to the related descriptions in the foregoing embodiments for details that are not described in this embodiment, and further details are not described here.

EXAMPLE six

The present embodiment provides a reverse power supply apparatus provided on a terminal device side. Fig. 11 is a structural view of a reverse power supplying apparatus according to a sixth embodiment of the present invention.

This reverse power supply unit who sets up in terminal equipment side includes:

a second establishing module 1110, configured to establish a management channel with a powered device.

A second interaction module 1120, configured to interact with the powered device through the management channel in a process of supplying power to the powered device.

The power supply module 1130 is configured to supply power to the powered device at an output power level corresponding to a power consumption state of the powered device.

Further, if the second interaction module 1120 receives a class switching request from the powered device, the power supply module 1130 powers the powered device with an output power of SR3 class; the second interaction module 1120, if the class switching request sent by the powered device is not received within a preset time period, the power supply module 1130 powers the powered device with an output power of SR2 class.

Further, the second establishing module 1110 is configured to enable a PSE chip of a power supply device in the terminal device and a PD chip of the powered device to establish a management channel; or, the central processing unit CPU of the terminal device and the CPU of the powered device establish a management channel through a DSL link.

Further, the second interaction module 1120 is configured to enable a PSE chip of a power supply device in the terminal device to receive, through the management channel, a class switching request sent by a PD chip in the powered device; or, the CPU of the terminal device is caused to receive, via the management channel, a class switching request sent by the CPU of the powered device.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, and the scope of the invention should not be limited to the embodiments described above.

Claims

1. A reverse power supply method, performed on a Powered Device (PD), includes:

establishing a management channel with the terminal equipment;

detecting a state of power consumption of the power receiving device in a process of receiving power supply of the terminal device;

interacting with the terminal equipment through the management channel to enable the terminal equipment to supply power to the powered equipment at the output power level corresponding to the state; the terminal equipment supplies power to the power receiving equipment through a copper wire; wherein the detecting a state in which the power receiving apparatus consumes power includes:

detecting whether the absolute value of the difference value between the maximum allowable output power of the terminal equipment and the consumed power of the powered equipment is smaller than a preset power threshold value or not;

the interacting with the terminal device through the management channel to enable the terminal device to supply power to the powered device at the output power level corresponding to the state includes:

if the absolute value of the difference is smaller than the power threshold, sending a class switching request to the terminal equipment once every preset time period through the management channel, so that the terminal equipment supplies power to the powered equipment with the output power of the SR3 class according to the class switching request;

and if the absolute value of the difference is larger than or equal to the power threshold, prohibiting transmitting the grade switching request to the terminal equipment, and enabling the terminal equipment to supply power to the powered equipment with the output power of the SR2 grade.

2. The method of claim 1,

the detecting a state in which the power receiving apparatus consumes power includes:

detecting whether the current supplied to the powered device by the terminal device is larger than a preset current threshold value; when the current is greater than the current threshold, the terminal device supplies power to the powered device with output power of SR3 level, and the absolute value of the difference between the maximum allowable output power of the terminal device and the consumed power of the powered device is smaller than a preset power threshold;

if the current is larger than the current threshold, sending a grade switching request to the terminal equipment once every preset time period through the management channel, so that the terminal equipment supplies power to the powered equipment at the output power of SR3 grade according to the grade switching request;

and if the current is less than or equal to the current threshold, prohibiting the grade switching request from being sent to the terminal equipment, so that the terminal equipment can supply power to the powered equipment with the output power of the SR2 grade.

3. The method of claim 1, wherein establishing a management channel with a terminal device comprises:

establishing a management channel between a PD chip of the powered device and a PSE chip of Power Supply Equipment (PSE) in the terminal equipment; alternatively, the first and second electrodes may be,

and establishing a management channel between a Central Processing Unit (CPU) of the powered device and a CPU of the terminal device through a Digital Subscriber Line (DSL) link.

4. The method of claim 3, wherein said interacting with the terminal device through the management channel comprises:

enabling the PD chip of the powered device to send a grade switching request to the PSE chip of the power supply device every other preset time period through the management channel; alternatively, the first and second electrodes may be,

and enabling the CPU of the powered device to send a grade switching request to the CPU of the terminal device every other preset time period through the management channel.

5. A reverse power supply method, performed on a terminal device side, comprising:

establishing a management channel with a powered device;

in the process of supplying power to the powered device, interacting with the powered device through the management channel, and supplying power to the powered device at an output power level corresponding to a power consumption state of the powered device; the terminal equipment supplies power to the power receiving equipment through a copper wire; wherein, the interacting with the powered device through the management channel and supplying power to the powered device at an output power level corresponding to a state of power consumption by the powered device include:

if a grade switching request sent by the powered device is received, the powered device is powered by output power of an SR3 grade;

and if the grade switching request sent by the powered device is not received within the preset time length, the powered device is powered by the output power of the SR2 grade.

6. The method of claim 5, wherein establishing a management channel with a powered device comprises:

establishing a management channel between a PSE chip of power supply equipment in the terminal equipment and a PD chip of the powered equipment; alternatively, the first and second electrodes may be,

and enabling a Central Processing Unit (CPU) of the terminal equipment and a CPU of the powered equipment to establish a management channel through a Digital Subscriber Line (DSL) link.

7. The method of claim 6, wherein the interacting with the powered device through the management channel comprises:

enabling a PSE chip of power supply equipment in the terminal equipment to receive a grade switching request sent by a PD chip in the powered equipment through the management channel; alternatively, the first and second electrodes may be,

and enabling the CPU of the terminal equipment to receive the grade switching request sent by the CPU of the power receiving equipment through the management channel.

8. A reverse power feeding apparatus provided on a power receiving device (PD) side, comprising:

the first establishing module is used for establishing a management channel with the terminal equipment;

the detection module is used for detecting the power consumption state of the power receiving equipment in the process of receiving power supply of the terminal equipment;

the first interaction module is used for interacting with the terminal equipment through the management channel to enable the terminal equipment to supply power to the powered equipment at an output power level corresponding to the state; the terminal equipment supplies power to the power receiving equipment through a copper wire; the detection module is configured to detect whether an absolute value of a difference between a maximum allowed output power of the terminal device and a consumed power of the powered device is smaller than a preset power threshold;

the first interaction module is configured to:

9. The apparatus of claim 8,

the detection module is used for detecting whether the current supplied to the powered device by the terminal device is greater than a preset current threshold value; when the current is greater than the current threshold, the terminal device supplies power to the powered device with output power of SR3 level, and the absolute value of the difference between the maximum allowable output power of the terminal device and the consumed power of the powered device is smaller than a preset power threshold;

the first interaction module is configured to:

10. The apparatus of claim 8, wherein the first establishing module is to:

11. The apparatus of claim 10, wherein the first interaction module is to:

12. A reverse power supply device, provided on a terminal device side, comprising:

the second establishing module is used for establishing a management channel with the powered device;

the second interaction module is used for interacting with the powered device through the management channel in the process of supplying power to the powered device;

a power supply module, configured to supply power to the powered device at an output power level corresponding to a power consumption state of the powered device; the terminal equipment supplies power to the power receiving equipment through a copper wire; wherein if the second interaction module receives a class switching request sent by the powered device, the power supply module supplies power to the powered device with an output power of an SR3 class;

if the second interaction module does not receive the class switching request sent by the powered device within a preset time length, the power supply module supplies power to the powered device with the output power of the SR2 class.

13. The apparatus of claim 12, wherein the second establishing means is to:

14. The apparatus of claim 13, wherein the second interaction module is to: