CN106936598A - POE method and power supply unit and power receiving equipment - Google Patents
POE method and power supply unit and power receiving equipment Download PDFInfo
- Publication number
- CN106936598A CN106936598A CN201511026074.3A CN201511026074A CN106936598A CN 106936598 A CN106936598 A CN 106936598A CN 201511026074 A CN201511026074 A CN 201511026074A CN 106936598 A CN106936598 A CN 106936598A
- Authority
- CN
- China
- Prior art keywords
- power
- power supply
- receiving equipment
- lines
- supply unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Sources (AREA)
- Small-Scale Networks (AREA)
Abstract
This application discloses POE method and power supply unit and power receiving equipment.Methods described can include：One the four of ethernet port line of power supply unit to be connected to the single power receiving equipment of ethernet port to powering；Power supply unit detects the power output of ethernet port to obtain the first power output；When the first power output is less than the first predetermined power, four the two of line centering lines of power supply unit for power receiving equipment to powering.Using POE method disclosed in the present application and power supply unit and power receiving equipment, power supply unit can be when the power demand of power receiving equipment be smaller, only retain two lines to being powered for power receiving equipment, make power receiving equipment take out the maintenance electric current that is formed of electricity from power supply unit in MPS modes to exist only among two lines pair, so as to avoid causing the problem of power receiving equipment power down because the actual current of line centering does not reach the requirement for maintaining to be continuously in power supply state between power supply unit and power receiving equipment.
Description
Technical field
The application is related to the communications field, more particularly to POE method and power supply unit and power receiving equipment.
Background technology
POE (English：Power over Ethernet, PoE) it is a kind of (English in ethernet line：Ethernet
Cable with data transfer electric power (English on)：Electrical power) technology.Power supply unit (English：power
Sourcing equipment, PSE) by ethernet line and power receiving equipment (English：Powered device, PD) even
Connect.Wherein, ethernet line can be twisted-pair feeder (English：twisted pair cable).Each ethernet twisted pair
Four lines are generally comprised to (English：wire pairs).Using POE when, PSE can with two lines to for
PD powers.
Because each line takes out electric forming by PD to upper supply current according to the power demand of itself, therefore when PD is in sky
During not busy state, because PD power demands are smaller, the supply current in set of twisted pair accordingly also can be smaller.If set of twisted pair
On supply current be less than predetermined value for a long time, PSE will stop being powered for PD.To avoid PD in idle condition
When there is the situation that PSE stops powering for PD, PD, can be by maintaining power features (English when in idle condition
Text：Maintain Power Signature, MPS) mode takes out electricity from PSE.PD takes out electricity in MPS modes from PSE can
To maintain to be continuously in power supply state between PSE and PD.MPS modes refer to PD at interval of scheduled duration, taken out from PSE
Take one and continue at least 75 milliseconds (ms) and more than 10 milliamperes of electric currents of (mA), wherein, the scheduled duration is usual
Less than 250ms.If PD does not take out electricity or takes out electric current less than 10mA beyond the scheduled time, PSE stops being powered for PD.
With the development of technology, PSE is only with two lines to cannot meet the power consumption demand of PD for PD powers.Cause
This PSE begins to use four lines to for PD powers.When using four lines to being powered for PD, can be by four lines to drawing
It is divided into two set of twisted pair, each of which set of twisted pair includes two lines pair.When PSE uses four lines to being PD simultaneously
During power supply, PD takes out electricity from two set of twisted pair.Due to two set of twisted pair parallel connections, the electric current of each two set of twisted pair is big
The about half of total current.If PD takes out the electric current of electricity less than 20mA, each set of twisted pair in MPS modes from PSE
Electric current be less than 10mA.Because the electric current of each set of twisted pair is unsatisfactory for MPS requirements, PSE can stop being powered for PD.
The content of the invention
This application provides POE method and PSE and PD, to solve when using four lines to being powered for PD,
The requirement of power supply state is continuously between not reaching maintenance PSE and PD because of the actual current of line centering, and causes PD to fall
The problem of electricity.
In a first aspect, this application provides a kind of POE method, the method includes：Power supply unit is with an ether
Four lines of port are netted to being powered to be connected to the single power receiving equipment of the ethernet port；The power supply unit detects institute
The power output of ethernet port is stated to obtain the first power output；The first predetermined power is less than in first power output
When, the power supply unit two lines of four line centerings for the power receiving equipment to powering.Using this implementation,
Power supply unit can only retain two lines to being powered for power receiving equipment when the power demand of power receiving equipment is smaller, make by electricity
Equipment is taken out the maintenance electric current that is formed of electricity and is existed only among two lines pair in MPS modes from power supply unit, so as to avoid because
The actual current of line centering does not reach and is continuously in the requirement of power supply state and causes between maintenance power supply unit and power receiving equipment
The problem of power receiving equipment power down.
With reference in a first aspect, in first aspect in the first possible implementation, in the power supply unit with described four
Two lines of line centering are to before being powered for the power receiving equipment, also including：The power supply unit is sent out to the power receiving equipment
The first power supply mode is sent to notify, first power supply mode is notified for indicating the power supply unit will to use described two lines
To being powered for the power receiving equipment.Using this implementation, power supply unit can be used two lines pair by power supply unit in advance
For the situation of the power supply of power receiving equipment informs power receiving equipment, so that power receiving equipment can clearly know that power supply unit will be used
Two lines for power receiving equipment to powering.
The first possible implementation with reference to first aspect, it is described in second possible implementation of first aspect
It is via the designated bit in Media Dependent Interface powered types-Length Value TLV that first power supply mode is notified；Or, described
First power supply mode notifies to be power supply mode TLV.Using this implementation, power supply unit can utilize power supply unit and receive
Existing communication mode between electric equipment sends out the first power supply mode notice.
With reference to first aspect or first aspect first or two kind of possible implementation any of which, in first aspect
In three kinds of possible implementations, methods described also includes：With described two lines to the mistake powered for the power receiving equipment
Cheng Zhong, the power supply unit detects the power output of the ethernet port to obtain the second power output；Described second
Power output be higher than the second predetermined power when, the power supply unit four lines to being powered for the power receiving equipment, its
In, second predetermined power is more than or equal to first predetermined power.Using this implementation, power supply unit can be with
To the power supply for power receiving equipment, changed into using four lines to for power receiving equipment is powered from using two lines, such that it is able to full
The power consumption demand of sufficient power receiving equipment.
The third possible implementation with reference to first aspect, in the 4th kind of possible implementation of first aspect, with
Four lines are to before being powered for the power receiving equipment, also including：The power supply unit sends the to the power receiving equipment
Two power supply modes notify that second power supply mode is notified for indicating the power supply unit will be with four lines to being institute
Power receiving equipment is stated to power.Using this implementation, power supply unit can in advance by power supply unit using four lines to for by electricity
The situation of the power supply of equipment informs power receiving equipment, so that power receiving equipment can clearly know that power supply unit will use four lines
To being powered for power receiving equipment.
It is described in the 5th kind of possible implementation of first aspect with reference to the 4th kind of possible implementation of first aspect
It is via the designated bit in Media Dependent Interface powered types-Length Value TLV that second power supply mode is notified；Or described
Two power supply modes notify to be power supply mode TLV.Using this implementation, power supply unit can be using power supply unit and by electricity
Existing communication mode between equipment sends out the second power supply mode notice.
Second aspect, present invention also provides another POE method, methods described includes：Power receiving equipment uses four
Individual line from power supply unit to taking out electricity；The power receiving equipment will be reduced to four lines to the power that electricity is taken out from the power supply unit
Below first predetermined power, so that the power supply unit uses two lines of four line centerings to being the power receiving equipment
Power supply；The power receiving equipment maintains the power receiving equipment with described two lines in MPS modes to taking out electricity from the power supply unit
With the power supply state between the power supply unit.Using this implementation, power supply unit can be needed in the power of power receiving equipment
When asking smaller, only retain two lines to being powered for power receiving equipment, power receiving equipment is taken out electric institute from power supply unit in MPS modes
The maintenance electric current of formation is existed only among two lines pair, so as to avoid not reaching maintenance power supply because of the actual current of line centering
The requirement of power supply state is continuously between equipment and power receiving equipment and causes the problem of power receiving equipment power down.
With reference to second aspect, in second aspect in the first possible implementation, methods described also includes：It is described by electricity
Equipment improves to more than the second predetermined power the power that electricity is taken out from the power supply unit, so that the power supply unit uses institute
Four lines are stated to for the power receiving equipment is powered, wherein, second predetermined power is more than or equal to the described first predetermined work(
Rate；When conforming to a predetermined condition, four lines of the power receiving equipment from power supply unit according to power demand to taking out electricity.Using
This implementation, power supply unit can from using two lines to the power supply for power receiving equipment, change into using four lines to for
Power receiving equipment is powered, such that it is able to meet the power consumption demand of power receiving equipment.
With reference to second aspect or second aspect the first possible implementation, in second possible realization side of second aspect
In formula, the power receiving equipment maintains the power receiving equipment with described two lines in MPS modes to taking out electricity from the power supply unit
Include with the power supply state between the power supply unit：The power receiving equipment receives the power receiving equipment and sends the first supplier of electricity
Formula notified, first power supply mode is notified for indicating the power supply unit will to use described two lines to receiving electric for described
Equipment is powered；After the first power supply mode notice is received, the power receiving equipment is with the described two lines of MPS modes
To taking out the power supply state between the electricity maintenance power receiving equipment and the power supply unit from the power supply unit.Using this realization
Power supply unit can be informed the situation of the power supply for power receiving equipment and set by electricity by mode, power supply unit using two lines in advance
It is standby, so that power receiving equipment can clearly know that power supply unit will be using two lines to for power receiving equipment is powered.
It is described in second aspect in the third possible implementation with reference to second possible implementation of second aspect
Power receiving equipment is included with four lines to taking out electricity from power supply unit：The power receiving equipment with described two lines to from the power supply
During equipment takes out electricity, receive the power receiving equipment and send the second power supply mode notice, second power supply mode is notified
For indicating the power supply unit will be using four lines to for the power receiving equipment is powered；Supplied receiving described second
After electrically notifying, the described two lines of the power receiving equipment from the power supply unit to taking out electricity.Using this implementation,
Power supply unit can be informed power receiving equipment by power supply unit using four lines to the situation of the power supply for power receiving equipment in advance, from
And power receiving equipment is clearly known that power supply unit will be using four lines to for power receiving equipment is powered.
The third aspect, present invention also provides a kind of power supply unit, the power supply unit includes：Power supply circuit and Ethernet
Port；The ethernet port includes four lines pair, wherein, four lines pair are connected with single power receiving equipment；It is described
Power supply circuit and the ethernet port are connected；The power supply circuit, for four lines to being the power receiving equipment
Power supply, detects the power output of the ethernet port to obtain the first power output, and in first power output
During less than the first predetermined power, with two lines of four line centerings to being powered for the power receiving equipment.Using this realization
Mode, power supply unit can only retain two lines to being powered for power receiving equipment when the power demand of power receiving equipment is smaller,
Make power receiving equipment take out the maintenance electric current that is formed of electricity from power supply unit in MPS modes to exist only among two lines pair, so that
Avoid not reaching the requirement for maintaining to be continuously in power supply state between power supply unit and power receiving equipment because of the actual current of line centering
And cause the problem of power receiving equipment power down.
With reference to the third aspect in the third aspect in the first possible implementation, the PSE also includes：Processor, uses
Notified in the first power supply mode is sent to the power receiving equipment by the ethernet port, first power supply mode is notified
For indicating the power supply unit will be using described two lines to for the power receiving equipment is powered.
With reference to the third aspect or the third aspect the first possible implementation, in second possible realization side of the third aspect
In formula, the power supply circuit, including PSE chips, on-off circuit and power supply；The power supply via the on-off circuit and
Ethernet port connection, and to the ethernet port four lines to power supply；The PSE chips, are used for
The power output of the ethernet port is detected to obtain the first power output, and in first power output less than the
During one predetermined power, control the on-off circuit so that two lines from the power supply to four line centerings to power supply.
With reference to the third aspect or the third aspect the first possible implementation, the third possible realization side in the third aspect
In formula, the power supply circuit, including PSE chips and power supply；The power supply and the PSE chips are connected, and to described
PSE chip power supplies；The PSE chips and the ethernet port are connected；The PSE chips, for described four
Line detects the power output of the ethernet port to obtain the first power output to being powered for the power receiving equipment, and
When first power output is less than the first predetermined power, with two lines of four line centerings to being set by electricity for described
Available electricity.
With reference to the third aspect or the possible implementation any of which of the first to three kind of the third aspect, in the third aspect
In four kinds of possible implementations, the power supply circuit is additionally operable to detect the power output of the ethernet port to obtain
Second power output；And when second power output is higher than the second predetermined power, with four lines to for described in
Power receiving equipment is powered.Using this implementation, power supply unit, to the power supply for power receiving equipment, can be changed from using two lines
It is changed into using four lines to for power receiving equipment is powered, such that it is able to meet the power consumption demand of power receiving equipment.
It is described in the 5th kind of possible implementation of the third aspect with reference to the 4th kind of possible implementation of the third aspect
Processor, is additionally operable to send the second power supply mode notice, described second to the power receiving equipment by the ethernet port
Power supply mode is notified for indicating the power supply unit will be using four lines to for the power receiving equipment is powered.
Fourth aspect, present invention also provides a kind of PD, the PD includes：Parasite power supplier and ethernet port；It is described
Ethernet port includes four lines pair, wherein, four lines pair are connected with power supply unit；The parasite power supplier and described
Ethernet port is connected；The parasite power supplier, for four lines to taking out electricity from the power supply unit；With four lines pair
During taking out electricity from the power supply unit, the power that electricity is taken out from the power supply unit is reduced to below the first predetermined power,
So that the power supply unit using two lines of four line centerings to being powered for the power receiving equipment；Used in MPS modes
Described two lines from the power supply unit to taking out electricity to maintain the power supply shape between the power receiving equipment and the power supply unit
State.
With reference to fourth aspect, in fourth aspect in the first possible implementation, the parasite power supplier, be additionally operable to by from
The power that the power supply unit takes out electricity is improved to more than the second predetermined power, so that the power supply unit uses four lines
To being powered for the power receiving equipment, wherein, second predetermined power is more than or equal to first predetermined power；With four
Individual line from power supply unit to taking out electricity.
Using the method and power supply unit and power receiving equipment of the drawings of the application institute, power supply unit can be in the power of power receiving equipment
When demand is smaller, only retain two lines to being powered for power receiving equipment, power receiving equipment is taken out electricity from power supply unit in MPS modes
The maintenance electric current for being formed is existed only among two lines pair, so as to avoid supplying because the actual current of line centering does not reach maintenance
The requirement of power supply state is continuously between electric equipment and power receiving equipment and causes the problem of power receiving equipment power down.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme in the application, embodiment will be described below needed for the accompanying drawing to be used
It is briefly described, it should be apparent that, for those of ordinary skills, do not paying creative labor
Under the premise of, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the flow chart of the application POE method one embodiment；
Fig. 2 is the structural representation of the application PSE one embodiment；
Fig. 3 is the structural representation of the application PD one embodiment.
Specific embodiment
In this application, PSE can be by meeting the ether of EIA/TIA T568A standards or EIA/TIA T568B standards
Netting twine is powered to PD.When the ethernet line is ethernet line when meeting the twisted-pair feeder of EIA/TIA 568B standards
Four included lines are to being divided into two set of twisted pair.Under normal circumstances can the orange in too netting twine is white-orange line pair
And green white-blue line is to as a set of twisted pair；And using the indigo plant in too netting twine it is white-green line pair and palm fibre it is white-brown line is to as another
Individual set of twisted pair.
For ease of description, below by orange white-orange line pair and green white-blue line to two lines to being referred to as the first set of twisted pair；And will
Lan Bai-green line pair and brown white-brown line are to two lines to being referred to as the second set of twisted pair.PSE can only pass through the first set of twisted pair
Including two lines including of two lines pair or the second set of twisted pair to for PD powers, it is also possible to while passing through the first twisted-pair feeder
Four lines that group includes with the second set of twisted pair are to for PD powers.
It is the flow chart of the application ether network method one embodiment referring to Fig. 1, the method comprises the following steps：
Step 101, one the four of ethernet port line of power supply unit to be connected to the single of the ethernet port to receiving
Electric equipment is powered, and four lines of power receiving equipment from power supply unit to taking out electricity.
When PD is connected to certain ethernet port of PSE by ethernet line, PSE after start-up, can use connection
To two set of twisted pair in the ethernet line of the ethernet port for PD powers simultaneously, i.e. PSE is used after start-up
, to being powered for PD, four lines of PD from PSE to taking out electricity for four lines.
Step 102, the power supply unit detects the power output of the ethernet port to obtain the first power output.
During being powered for PD using two set of twisted pair, PSE can detect the power output of the ethernet port
To obtain the first power output.Wherein, the first power output can be equal to the PD two set of twisted pair from the PSE
The power for taking out electricity adds the power being lost in by ethernet line transmitting procedure in electric power.
Step 103, if taking out the power of electricity from the power supply unit due to power receiving equipment reduction so that first output
Power is less than the first predetermined power, then the power supply unit two lines of four line centerings are to being the power receiving equipment
Power supply.
Wherein, first predetermined power can be configured as required, can be more than or equal to PD via four lines pair
The power output of PSE when taking out electricity and meeting the minimum current of MPS requirements.First predetermined power is generally less than PSE by one
Individual set of twisted pair is the maximum output power that be can be provided when PD powers.For example, PD is total during electricity to taking out via four lines
When electric current is 20mA, two total currents of set of twisted pair are 20mA, and the electric current of wherein at least one twisted wire group is more than or equal to
10mA, meets the minimum current of MPS requirements.When the supply voltage of PSE is 48 volts (V), the electric current that PD takes out electricity is
During 20mA, the power output of PSE is 0.96w, and the first predetermined power can be between 0.96w to 30w.If power supply
Voltage is 54V, and the first predetermined power can be between 1.08w to 30w.Therefore, first predetermined power can be
About 1w.
If PD needs to enter idle condition, and maintains to be in power supply state between the PSE and the PD, then institute
Stating PD first can be reduced to below the first predetermined power the power that electricity is taken out from the PSE, so that the first power output
Less than the first predetermined power, when the first power output is less than the first predetermined power, PSE can be determined that the PD may be needed
Maintain to be in power supply state between PSE and PD.
Wherein, the mode of the power that electricity is taken out in the PD reductions from the power supply unit can have various.
Optionally, PD can will take out electrical power and be reduced to below the first predetermined power, and continue to take out electricity from the PSE.Example
Such as, the power that electricity is taken out from the power supply unit can be down to the 3rd predetermined power by the PD, and be held with the 3rd predetermined power
It is continuous to take out electricity from PSE.Wherein, the 3rd power is less than first predetermined power.
Optionally, PD directly can also take out electricity in MPS modes from the PSE, so that the first output that PSE is detected
Power is less than the first predetermined power.
During using two set of twisted pair to be powered for PD, if the PD is reduced to the first predetermined power from PSE
Below even pause from PSE take out electricity when, PSE can not stop being powered for PD immediately, but retain described two multiple twins
One in line group powers for the power receiving equipment, can carry out taking out electricity in MPS modes in order to PD.When PD is not with MPS
When mode carries out taking out electricity, then stop being powered for PD.
It is that PSE can be protected when using a set of twisted pair to be powered for PD for PD power switchings from two set of twisted pair are used
Any one set of twisted pair is stayed for PD powers.For example, PSE can stop using the first set of twisted pair for PD powers, and
Only retain the second set of twisted pair for PD powers；The second set of twisted pair can also be stopped using for PD powers, and only retain
One set of twisted pair is powered for PD.And it is determined that two lines of the power supply unit in four lines pair for described to receiving electricity
Equipment is powered.PSE stop using certain set of twisted pair for PD power when, remove two lines included by the set of twisted pair to upper
Electrical potential difference between PSE and PD.
PSE can be according in preset rules two set of twisted pair of reservation for PD powers.PSE can also be selected independently
Retain which set of twisted pair for PD powers.
Alternatively, PSE can send first and supply after it is determined that one group of set of twisted pair of reservation is powered for PD to power receiving equipment
Which electrically notify, to indicate the PSE will be using set of twisted pair as PD powers.
PSE can be (English with Link Layer Discovery Protocol with PD：Link Layer Discovery Protocol, LLDP)
During communication, with LLDP data cells (English：LLDP data unit, LLDPDU) in type-length-
Value (English：Type-length-value, TLV) the first power supply mode notice is sent to PD, so as to inform described in PD
PSE will be using which set of twisted pair for PD powers.
Optionally, the PSE can be powered the specified ratio in (Power via MDI) TLV with via Media Dependent Interface
It is special to send the first power supply mode notice to PD.For example, PSE can increase for indicating to supply in Power via MDI TLV
The specified bytes of electric set of twisted pair used, the set of twisted pair for being powered for PD is indicated by the different values of specified bytes.
When the value of the specified bytes is 1, represent that PSE will be that PD powers with the first set of twisted pair.When the specified bytes
Value be 2 when, represent PSE will be that PD powers with the second set of twisted pair.When the value of the specified bytes is 3, represent
PSE will be that PD powers with two set of twisted pair.And value is that 0 expression power supply mode is constant or power supply mode is unknown.Value
The implication of 4 to value 255 retains, to be subsequently used for other purposes.Or, PSE can also utilize Power via MDI
Reservation bit in TLV indicates the set of twisted pair for being powered for PD, is indicated by the different values of reservation bit different
Set of twisted pair.
Optionally, PSE can also send power supply mode (power during LLDP negotiations are carried out with PD to PD
model)TLV.Power model TLV can be the twisted-pair feeder that PD power supply stations use dedicated for indicating PSE, pass through
The different values of power model TLV indicate the different set of twisted pair for being powered for PD.The power model TLV
Length can be a byte.When the first bit value of power model TLV is 1, represent that PSE will make simultaneously
It is that PD powers with two set of twisted pair.When the first bit value of power model TLV is 0, represent that PSE will be used
Predetermined set of twisted pair is powered for PD, wherein, the predetermined set of twisted pair both can be the first set of twisted pair；Can also be
Two set of twisted pair.
To avoid causing PSE being powered using two set of twisted pair and using a set of twisted pair because power output is unstable
Toggled between power supply, PSE can power output less than the first predetermined power state continue scheduled duration after, then
Using a set of twisted pair for the PD powers.
Step 104, power receiving equipment remains described by electricity with described two lines in MPS modes to taking out electricity from the power supply unit
Power supply state between equipment and the power supply unit.
After one set of twisted pair of PSE reservations is powered for PD, PD can continue to take out electricity from PSE with the set of twisted pair,
Electricity can be taken out from the twisted-pair feeder in MPS modes.
Because PD only can be with two in the set of twisted pair line to taking out electricity, therefore two line centerings of the set of twisted pair from PSE
Electric current to be exactly PD take out from PSE electricity total current.If PD takes out electricity in MPS modes from PSE, then only can be in this pair
Two line centerings that twisted wire group is included are present takes out electric current, when the total current that PD takes out electricity from PSE is more than 10mA, should
Two electric currents of line centering that set of twisted pair is included can also be more than 10mA so that two lines pair that the set of twisted pair is included
In electric current can meet the requirement of MPS, such that it is able to maintain to be in power supply state between PSE and PD.
Because during with described two lines to being powered for the power receiving equipment, PSE only retains a set of twisted pair and is
PD is powered, therefore PD is only capable of by two lines to taking out electricity from PSE, therefore when PD takes out electricity in MPS modes from PSE,
For the two line centerings powered for PD, actual current is continuously in power supply state between can reaching maintenance PSE and PD
Requirement, there is power down when in idle condition such that it is able to avoid PD.
If power receiving equipment does not take out electricity in MPS modes from PSE, such as power receiving equipment stops taking out electricity, then PSE stops being PD
Power supply.
By the way of this implementation is provided, power supply unit can only retain two when the power demand of power receiving equipment is smaller
Individual line makes power receiving equipment take out the electric maintenance electric current for being formed from power supply unit in MPS modes and only deposits to being powered for power receiving equipment
It is among two lines pair, so as to avoid not reaching between maintenance power supply unit and power receiving equipment because of the actual current of line centering
It is continuously in the requirement of power supply state and causes the problem of power receiving equipment power down.
When the PD enters working condition from idle condition, PD can take out according to the power demand of itself from the PSE
Electricity.Because PD is when in idle condition, PSE only retains the two of set of twisted pair lines to for PD powers.To keep away
Exempt to exceed power supply capacity when PSE is powered using a set of twisted pair because of the power demand of PD, cause power supply process to occur asking
Topic, PSE can recover to use two set of twisted pair when PD enters working condition from idle condition, i.e., four lines pair are
PD powers.Alternatively, after step 104, can also include：
Step 105, the power supply unit using two lines to being powered for the power receiving equipment during, the power supply
Equipment detects the power output of the ethernet port to obtain the second power output.
During being powered for PD using a set of twisted pair, PSE can detect the power output of the ethernet port
To obtain the second power output.Wherein, the second power output can be equal to the PD one set of twisted pair from the PSE
The power for taking out electricity adds the power being lost in by ethernet line transmitting procedure in electric power.
Wherein, the power supply unit using two lines to the process powered for the power receiving equipment, can both include PD with
Two lines of MPS modes from PD to taking out electric process, it is also possible to including PD with two lines to continuing to take out electric process from PD.
Step 106, if taking out the power of electricity from the power supply unit due to power receiving equipment lifting so that second output
Power is higher than the second predetermined power, and the power supply unit four lines for the power receiving equipment to powering.
The PD can first lift the power for taking out electricity from the PSE and improve to more than the second predetermined power, so that PSE
Can know that PD will enter working condition from idle condition.
Wherein, the second predetermined power is more than or equal to the first predetermined power, and is by a set of twisted pair less than or equal to PSE
The maximum output power that be can be provided when PD powers.Under normal circumstances, second predetermined power is less than the PD in work
Make power demand actual during state.Alternatively, to avoid being caused because power output is unstable PSE double using one
Twisted wire group power with powered using two set of twisted pair between frequent switching, second predetermined power can be more than first pre-
Determine power.For example, when first predetermined power is 1w, second predetermined power can be 2w.
The PD improves the power that electricity is taken out from the PSE can cause the ethernet port to more than the second predetermined power
Power output, i.e. the second power output, higher than the second predetermined power.If second power output is higher than the second predetermined work(
Rate, then illustrate that the PD will be converted to working condition from idle condition, to ensure power supplying efficiency and power supply capacity, PSE
Can recover using four lines to for the power receiving equipment is powered.
For avoid PSE use a set of twisted pair for PD power with use two set of twisted pair for PD power between frequently
Switching, can also preset one or more predetermined conditions.Second power output is higher than the second predetermined power, and
And when meeting the predetermined condition, PSE recovers using four lines to for PD powers again.
For example, the predetermined condition can become for second power output in scheduled duration.The PSE can
, higher than the second predetermined power and when becoming in scheduled duration, then recover to use four with second power output
Individual line for PD to powering.When amplitude of variation of second power output in scheduled duration is less than predetermined amplitude, it is believed that institute
The second power output is stated not changed in scheduled duration.
In recovery using four lines to before being powered for PD, PSE can also send the second power supply mode and notify to power receiving equipment,
Second power supply mode is notified for indicating the power supply unit will be with four lines to for the power receiving equipment is powered.
Wherein, second power supply mode notifies the designated bit or power that can pass through Power-via-MDI TLV by PSE
Model TLV send to the power receiving equipment.Concrete mode may refer to the related content that foregoing first power supply mode is notified,
Just repeat no more herein.
After recovering to use two set of twisted pair for the PD electricity consumptions, PSE can also continue to monitoring from the ethernet side
Mouthful power output to obtain the first power output, and when first power output is less than the first predetermined power, then institute
Power supply unit two lines of four line centerings are stated to for the power receiving equipment is powered.Detailed process may refer to step
102 to step 104, just repeats no more herein.
PSE recover using four lines to being powered for PD after, PD can be according to the power demand of itself with four lines pair
Electricity is taken out from PSE.Wherein, the power demand of PD can be more than second predetermined power, it is also possible to less than or equal to described
Second predetermined power.
If for example, the PSE is 40W in the in running order power demand for being, when PD is being needed from idle condition
When being switched to working condition, if PSE is that PD powers with a set of twisted pair, then PD can first by with one pair
Twisted wire group takes out electric power ascension to 15W from PSE；Switched to using two set of twisted pair as PSE powers etc. the PSE
When, PD can will take out electric power ascension to 40W from PSE again.Wherein, 15W and 40W are for example, in reality
Can also be other performance numbers in the use of border.
Using the present embodiment, PSE can recover using two set of twisted pair as PD is supplied when the power demand of PD is higher
Electricity, so as to improve power supplying efficiency, meets the power demand of PD.
It is the structural representation of the application PSE one embodiment referring to Fig. 2.Wherein, it is for the part that dotted line is represented
Optional part.The PSE can not also include the annexation between the circuit that be included of dotted portion and circuit.
As shown in Fig. 2 the PSE can include：Power supply circuit 201 and ethernet port 202；The ethernet side
Mouth 202 includes four lines pair, wherein, four lines pair are connected with single power receiving equipment；The He of the power supply circuit 201
The ethernet port 202 is connected；The power supply circuit 201, for four lines to be the power receiving equipment supply
Electricity, detects the power output of the ethernet port 202 to obtain the first power output, and in first output work
When rate is less than the first predetermined power, with two lines of four line centerings to being powered for the power receiving equipment.
Optionally, the power supply circuit 201, is additionally operable to detect the power output of the ethernet port 202 to obtain
Two power outputs；And when second power output is higher than the second predetermined power, with four lines to being received for described in
Electric equipment is powered.Using this implementation, power supply unit, to the power supply for power receiving equipment, can be changed from using two lines
It is to for power receiving equipment is powered, such that it is able to meet the power consumption demand of power receiving equipment using four lines.
The power supply circuit 201, including PSE chips and power supply.It is shown in solid in Fig. 2, the power supply and the PSE
Chip is connected, and to the PSE chip power supplies.Fig. 2 kinds are represented by dotted lines a kind of alternative construction of power supply circuit 201.
In the structure, PSE chip controls power supply is powered for ethernet port.PSE chips can also directly for ethernet port is powered,
The structure of the power supply circuit 201 in such case is relatively simple, and schematic diagram is not provided in addition.
If PSE chips are directly for ethernet port is powered, the PSE chips and the ethernet port 202 connect (figure
Not shown in).The PSE chips, to being powered for the power receiving equipment, the Ethernet is detected for four lines
The power output of port 202 is obtaining the first power output, and is less than the first predetermined power in first power output
When, with two lines of four line centerings to being powered for the power receiving equipment.The PSE chips, can be also used for inspection
Survey the power output of the ethernet port 202 to obtain the first power output, and be higher than in second power output
During the second predetermined power, with four lines to four lines to power supply.
If PSE chips can control power supply to be powered for ethernet port, the power supply circuit 201, also including switch electricity
Road.As shown in the dotted portion in Fig. 2, the power supply is connected via the on-off circuit and the ethernet port 202,
And to the ethernet port 202 four lines to power supply；The PSE chips, for detecting the ethernet side
Mouthfuls 202 power output obtaining the first power output, and when first power output is less than the first predetermined power,
Control the on-off circuit so that two lines from the power supply to four line centerings to power supply.The PSE chips, also
Can be used for detecting the power output of the ethernet port 202 to obtain the second power output, and it is defeated described second
Go out power higher than the second predetermined power when, control the on-off circuit so that the power supply to four lines to power supply.Its
In, the on-off circuit can include two switches, and each switch can be by the PSE chip controls.Optionally,
One of them is switched for controlling first connecting and disconnecting of the circuit between set of twisted pair and power supply, and another is switched for controlling the
Connecting and disconnecting of the circuit between two set of twisted pair and power supply.Optionally, one of switch is master switch, for controlling two pairs
Connecting and disconnecting of the circuit between twisted wire group and power supply, another switch is only used for individually controlling one of described two set of twisted pair
Connecting and disconnecting of the circuit between power supply.The switch can be metal oxide semiconductor field effect tube (English：metal–
Oxide-semiconductor field-effect transi stor, abbreviation：), or other have out MOSFET
Close the device of function, such as technotron (English：Junction gate field-effect transi stor,
Abbreviation：JFET) or bipolar junction-type transistor (English：Bipolar junction transistor, abbreviation：BJT)
Deng.
Optionally, the PSE can also include：Processor, for by the ethernet port 202 to described by electricity
Equipment send the first power supply mode notify, first power supply mode notify for indicate the power supply unit will using described in
Two lines for the power receiving equipment to powering.The processor, can be also used for by the ethernet port 202 to institute
State power receiving equipment and send the second power supply mode and notify, second power supply mode is notified for indicating the power supply unit will to make
With four lines to being powered for the power receiving equipment.
It is the structural representation of the application PD one embodiment referring to Fig. 3.
As shown in figure 3, the PD includes：Parasite power supplier 301 and ethernet port 302.
The ethernet port 302 includes four lines pair, wherein, four lines pair are connected with power supply unit；It is described to receive
Circuit 301 and the ethernet port 302 are connected；The parasite power supplier 301, for four lines to from the confession
Electric equipment takes out electricity；During with four lines to taking out electricity from the power supply unit, the work(of electricity will be taken out from the power supply unit
Rate is reduced to below the first predetermined power, so that the power supply unit uses two lines of four line centerings to for described in
Power receiving equipment is powered；With MPS modes with described two lines to from the power supply unit take out electricity with maintain the power receiving equipment with
Power supply state between the power supply unit.
Optionally, the parasite power supplier 301, is additionally operable to take out electric power and improve to second from the power supply unit make a reservation for
It is more than power so that the power supply unit using four lines to being powered for the power receiving equipment, wherein, described second
Predetermined power is more than or equal to first predetermined power；With four lines to taking out electricity from power supply unit.Wherein, it is described by electricity
Circuit can include PD chips, DC transfer circuit etc., such that it is able to be according to the demand of each circuit element in the PD
Each circuit element is powered.
Technical scheme in the application can be embodied in the form of software product, and the software product can be stored in storage
In medium, such as read-only storage (English read-only memory, ROM), random access memory are (English：
Random-access memory, RAM), magnetic disc, CD etc., including some instructions are used to so that a computer equipment
(can be personal computer, server, or network equipment etc.) performs each embodiment of the application or embodiment
Method described in some parts.
Between each embodiment in this specification identical similar part mutually referring to.Above-described the application reality
Mode is applied, the restriction to the application protection domain is not constituted.
Claims (10)
1. a kind of POE method, it is characterised in that including：
One the four of ethernet port line of power supply unit to be connected to the single power receiving equipment of the ethernet port to supplying
Electricity；
The power supply unit detects the power output of the ethernet port to obtain the first power output；
When first power output is less than the first predetermined power, the power supply unit is with two of four line centerings
Line for the power receiving equipment to powering.
2. the method for claim 1, it is characterised in that in the power supply unit with two in four lines pair
Individual line is to before being powered for the power receiving equipment, also including：
The power supply unit sends the first power supply mode and notifies to the power receiving equipment, and first power supply mode notifies to be used for
Indicate the power supply unit will be using described two lines to for the power receiving equipment is powered.
3. method as claimed in claim 2, it is characterised in that
It is via the designated bit in Media Dependent Interface powered types-Length Value TLV that first power supply mode is notified；
Or
First power supply mode notifies to be power supply mode TLV.
4. a kind of POE method, it is characterised in that including：
Four lines of power receiving equipment from power supply unit to taking out electricity；
The power receiving equipment will be reduced to below the first predetermined power with four lines to the power that electricity is taken out from the power supply unit,
So that the power supply unit using two lines of four line centerings to being powered for the power receiving equipment；
The power receiving equipment in MPS modes with described two lines to taking out electricity from the power supply unit, set by electricity with remaining described
It is standby with the power supply state between the power supply unit.
5. method as claimed in claim 4, it is characterised in that also include：
The power receiving equipment by with described two lines to from the power supply unit take out electricity power improve to the second predetermined power with
On so that the power supply unit using four lines to being powered for the power receiving equipment, wherein, the second predetermined work(
Rate is more than or equal to first predetermined power；
When conforming to a predetermined condition, four lines of the power receiving equipment from power supply unit according to power demand to taking out electricity.
6. a kind of power over Ethernet device PSE, it is characterised in that including：Power supply circuit and ethernet port；
The ethernet port includes four lines pair, wherein, four lines pair are connected with single power receiving equipment；
The power supply circuit and the ethernet port are connected；
The power supply circuit, to being powered for the power receiving equipment, the ethernet port is detected for four lines
Power output obtaining the first power output, and when first power output is less than the first predetermined power, with described
Four the two of line centering lines for the power receiving equipment to powering.
7. PSE as claimed in claim 6, it is characterised in that also include：
Processor, notifies, described for sending the first power supply mode to the power receiving equipment by the ethernet port
One power supply mode is notified for indicating the power supply unit will be using described two lines to for the power receiving equipment is powered.
8. PSE as claimed in claims 6 or 7, it is characterised in that
The power supply circuit, including PSE chips, on-off circuit and power supply；
The power supply is connected via the on-off circuit and the ethernet port, and to described the four of the ethernet port
Individual line is to power supply；
The PSE chips, for detecting the power output of the ethernet port to obtain the first power output, Yi Ji
When first power output is less than the first predetermined power, the on-off circuit is controlled so that the power supply is to four lines
Two lines of centering are to power supply.
9. PSE as claimed in claims 6 or 7, it is characterised in that
The power supply circuit, including PSE chips and power supply；
The power supply and the PSE chips are connected, and to the PSE chip power supplies；
The PSE chips and the ethernet port are connected；
The PSE chips, to being powered for the power receiving equipment, the ethernet port is detected for four lines
Power output obtaining the first power output, and when first power output is less than the first predetermined power, with described
Four the two of line centering lines for the power receiving equipment to powering.
10. a kind of Ethernet powered device PD, it is characterised in that including：Parasite power supplier and ethernet port；
The ethernet port includes four lines pair, wherein, four lines pair are connected with power supply unit；
The parasite power supplier and the ethernet port are connected；
The parasite power supplier, for four lines to taking out electricity from the power supply unit；With four lines to from it is described power supply set
For during taking out electricity, the power that electricity is taken out from the power supply unit is reduced to below the first predetermined power, so that the confession
Electric equipment is using two lines of four line centerings to being powered for the power receiving equipment；With the described two lines of MPS modes
To taking out electricity to maintain the power supply state between the power receiving equipment and the power supply unit from the power supply unit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511026074.3A CN106936598A (en) | 2015-12-31 | 2015-12-31 | POE method and power supply unit and power receiving equipment |
| PCT/CN2016/111338 WO2017114265A1 (en) | 2015-12-31 | 2016-12-21 | Ethernet power sourcing method and power sourcing equipment and powered device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511026074.3A CN106936598A (en) | 2015-12-31 | 2015-12-31 | POE method and power supply unit and power receiving equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106936598A true CN106936598A (en) | 2017-07-07 |
Family
ID=59224642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511026074.3A Pending CN106936598A (en) | 2015-12-31 | 2015-12-31 | POE method and power supply unit and power receiving equipment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106936598A (en) |
| WO (1) | WO2017114265A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964927A (en) * | 2018-06-08 | 2018-12-07 | 新华三技术有限公司 | Power over Ethernet PoE adaptive approach and device |
| CN109428726A (en) * | 2017-08-28 | 2019-03-05 | 华为技术有限公司 | Autosensing method and apparatus |
| CN110417559A (en) * | 2018-04-28 | 2019-11-05 | 华为技术有限公司 | Power over Ethernet device and detection method |
| CN111954995A (en) * | 2018-04-16 | 2020-11-17 | 美高森美Poe有限公司 | Marking and retaining system and method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108287501A (en) * | 2018-01-08 | 2018-07-17 | 苏州骋研电子技术有限公司 | The controller to PD equipment timing power supplies is realized based on low-frequency time-code Service of Timing |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005036815A1 (en) * | 2003-10-16 | 2005-04-21 | Powerdsine Ltd. | High power architecture for power over ethernet |
| CN101147356A (en) * | 2005-01-25 | 2008-03-19 | 凌特公司 | Supplying power over four pairs of conductors in communication cable |
| CN201294536Y (en) * | 2008-11-26 | 2009-08-19 | 深圳华为通信技术有限公司 | Ethernet power receiving equipment and Ethernet electric power system |
| CN102387022A (en) * | 2011-10-20 | 2012-03-21 | 华为技术有限公司 | Power over Ethernet method and device |
| CN103066683A (en) * | 2011-10-24 | 2013-04-24 | 凌力尔特有限公司 | Switching of conductor pair in power over Ethernet system |
| CN103200014A (en) * | 2011-12-20 | 2013-07-10 | 马克西姆综合产品公司 | Maintain power signature (MPS) powered device (PD) |
| EP2816759A1 (en) * | 2013-06-18 | 2014-12-24 | Linear Technology Corporation | Power over ethernet on data pairs and spare pairs |
| US20150035365A1 (en) * | 2013-07-31 | 2015-02-05 | Texas Instruments Incorporated | System and method for controlling power delivered to a powered device through a communication cable |
| CN104954146A (en) * | 2014-03-31 | 2015-09-30 | 鸿富锦精密工业（深圳）有限公司 | Ethernet power supply device |
| CN105049216A (en) * | 2015-08-25 | 2015-11-11 | 上海斐讯数据通信技术有限公司 | Ethernet power supply method and power supply system |
-
2015
- 2015-12-31 CN CN201511026074.3A patent/CN106936598A/en active Pending
-
2016
- 2016-12-21 WO PCT/CN2016/111338 patent/WO2017114265A1/en active Application Filing
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005036815A1 (en) * | 2003-10-16 | 2005-04-21 | Powerdsine Ltd. | High power architecture for power over ethernet |
| CN101147356A (en) * | 2005-01-25 | 2008-03-19 | 凌特公司 | Supplying power over four pairs of conductors in communication cable |
| CN201294536Y (en) * | 2008-11-26 | 2009-08-19 | 深圳华为通信技术有限公司 | Ethernet power receiving equipment and Ethernet electric power system |
| CN102387022A (en) * | 2011-10-20 | 2012-03-21 | 华为技术有限公司 | Power over Ethernet method and device |
| CN103066683A (en) * | 2011-10-24 | 2013-04-24 | 凌力尔特有限公司 | Switching of conductor pair in power over Ethernet system |
| CN103200014A (en) * | 2011-12-20 | 2013-07-10 | 马克西姆综合产品公司 | Maintain power signature (MPS) powered device (PD) |
| EP2816759A1 (en) * | 2013-06-18 | 2014-12-24 | Linear Technology Corporation | Power over ethernet on data pairs and spare pairs |
| US20150035365A1 (en) * | 2013-07-31 | 2015-02-05 | Texas Instruments Incorporated | System and method for controlling power delivered to a powered device through a communication cable |
| CN104954146A (en) * | 2014-03-31 | 2015-09-30 | 鸿富锦精密工业（深圳）有限公司 | Ethernet power supply device |
| CN105049216A (en) * | 2015-08-25 | 2015-11-11 | 上海斐讯数据通信技术有限公司 | Ethernet power supply method and power supply system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109428726A (en) * | 2017-08-28 | 2019-03-05 | 华为技术有限公司 | Autosensing method and apparatus |
| CN111954995A (en) * | 2018-04-16 | 2020-11-17 | 美高森美Poe有限公司 | Marking and retaining system and method |
| CN111954995B (en) * | 2018-04-16 | 2021-08-17 | 美高森美Poe有限公司 | Marking and retaining system and method |
| CN110417559A (en) * | 2018-04-28 | 2019-11-05 | 华为技术有限公司 | Power over Ethernet device and detection method |
| CN108964927A (en) * | 2018-06-08 | 2018-12-07 | 新华三技术有限公司 | Power over Ethernet PoE adaptive approach and device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017114265A1 (en) | 2017-07-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106936598A (en) | POE method and power supply unit and power receiving equipment | |
| CN104836446B (en) | The control method of isolated converter, control circuit and Switching Power Supply | |
| CN114514728B (en) | Initialization and synchronization of pulsed power in a network system | |
| CN103378975B (en) | Single pair of POE system and device | |
| US20130219204A1 (en) | Method and system for waking up remote devices | |
| EP3318004B1 (en) | Power providing device and method, power receiving device | |
| US11181959B2 (en) | System for transmitting power to a remote PoE subsystem by forwarding PD input voltage | |
| CN102123034B (en) | POE system is utilized to carry out method and the device of high-low pressure selection power supply | |
| CN109617039A (en) | Power receiving equipment and Power over Ethernet system | |
| CN106787619A (en) | It is configured to the electrical equipment of the POE of low duty cycle operation | |
| CN102497276B (en) | Power source conversion circuit and network camera with same | |
| CN1833262B (en) | Input voltage sense circuit in a line powered network element | |
| CN109005041A (en) | Local side equipment, reverse power supply system and method | |
| CN207010305U (en) | A kind of battery feed circuit, battery and unmanned plane | |
| CN109075714A (en) | Switched-mode power supply with the burst mode operation for reducing power consumption | |
| CN206733607U (en) | A kind of 3D printer and its outage detection device | |
| WO2020098613A1 (en) | Control method, power receiving device and system | |
| CN103078663B (en) | Energy-saving network equipment | |
| CN217404483U (en) | Novel circuit breaker gateway | |
| CN110289758A (en) | A kind of low-power consumption power supply circuit and electronic equipment | |
| CN206865474U (en) | A kind of POE electric supply installations | |
| CN207099404U (en) | Spliced switch controller based on KNX agreements | |
| CN202998121U (en) | Broadband device energy-saving device | |
| CN201303163Y (en) | Current driven type power socket | |
| CN207083178U (en) | A kind of conference reservation terminal based on poe power supplies |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170707 |
|
| WD01 | Invention patent application deemed withdrawn after publication |