CN105991294A - PoE (Power over Ethernet) power compensation method and PSE (Power Sourcing equipment) - Google Patents
PoE (Power over Ethernet) power compensation method and PSE (Power Sourcing equipment) Download PDFInfo
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Abstract
The invention provides a PoE power compensation method and PSE. The method comprises that the PSE obtains the resistance of an Ethernet line between the PSE and a PD (Powered Device) to supply; according to the output voltage of the PSE, the negotiation power, obtained by the PSE in advance, of the PD and the resistance of the Ethernet line, the PSE calculates compensation power; the PSE uses the sum of the negotiation power and the compensation power as output power; and the PSE supplies power to the PD via the Ethernet line according to the output power. The PSE detects the resistance of the Ethernet line to compensate the power output to the PD in real time as well as power loss in the Ethernet line, namely sufficient power is provided for the PD, and the PD is prevented from abnormal conditions as repeated power on/off due to the fact that sufficient power is not obtained.
Description
Technical field
The present embodiments relate to network power supply technology, particularly relate to a kind of POE (English: Power
Over Ethernet, is called for short: PoE) method and the power supply unit of power back-off are (English: power sourcing
Equipment, is called for short: PSE).
Background technology
Equipment in PoE system is divided into power supply unit and power receiving equipment (English: powered device, letter
Claim: PD), power supply unit is powered to power receiving equipment by ethernet line.
PSE power negotiations mainly has physical layer hierarchical negotiation and link layer protocol power negotiations two ways.
Physical layer hierarchical negotiation power is that PSE carries out classification, then according to the size of current of PD to output electric current
According to classification current output.Link layer protocol power negotiations is PSE with PD to communicate acquisition PD institute
The power consumption needed.Above-mentioned two ways is all that PSE obtains the power that this PD needs, then root to PD
According to consulting grade to PD output.PSE maximum power output is about 30W.
But, the power negotiations of PSE and PD only considered the situation of PD and PSE self, does not examine
Consider the applied environment of PoE, sometimes result in power that PD can not get negotiating or PD is gone up repeatedly
Electric and lower electricity.
Summary of the invention
The embodiment of the present invention provides a kind of method of PoE power back-off and power supply unit, for solve with
The problem that the power that the PD that PSE connects obtains can not reach to consult power sometimes.
Embodiment of the present invention first aspect provides a kind of method of PoE power back-off, including:
PSE obtains the resistance of the ethernet line between described PSE and PD to be powered；
Described PSE according to the output voltage of described PSE, described PSE obtain in advance with described PD's
The resistance calculations consulting power and described ethernet line compensates power；
Described PSE using described negotiation power and described compensation power and as output；
Described PSE is powered to described PD by described ethernet line according to described output.
In conjunction with first aspect, in the first possible embodiment of first aspect, described PSE obtains
The resistance of the ethernet line between described PSE and PD to be powered, including:
Described PSE detects the length of described ethernet line；
Described PSE obtains the resistance of the unit length of described ethernet line；
The length of described ethernet line is multiplied by described PSE with the resistance of the unit length of described ethernet line
Obtain the resistance of described ethernet line.
In conjunction with the first possible embodiment of first aspect, the reality that the second in first aspect is possible
Executing in mode, described PSE detects the length of described ethernet line, including:
Described PSE in an idle state, uses the ethernet line that PSE described in VCT technology for detection connects,
To obtain the first length；
Described PSE, when effective PD being detected, uses PSE described in VCT technology for detection with described
Ethernet line between PD, to obtain the second length；
Described PSE selects ethernet line described in conduct longer in described first length and described second length
Length.
In conjunction with the embodiment that the first or the second of first aspect are possible, at the third of first aspect
In possible embodiment, described PSE obtains the resistance of the unit length of described ethernet line, including:
Described PSE at least three power sends test signal to described ethernet line, and is sending every time
Obtain, after test signal, the signal to noise ratio that described PD detects；
The signal to noise ratio that described at least three power is corresponding with each power is done linear regression to obtain by described PSE
Take detection of straight lines, using the slope of described detection of straight lines as detection parameter；
The canonical parameter of described detection parameter with multiple netting twine is compared by described PSE, chooses with described
First netting twine type of detection parameter proximity；
Described PSE using the resistance of the unit length of described first netting twine type as the list of described ethernet line
The resistance of bit length.
In conjunction with first aspect the first, the second and any one the possible embodiment in the third,
In the 4th kind of possible embodiment of first aspect, described PSE obtains the unit of described ethernet line
The resistance of length, including:
Described PSE using the resistance of unit length that prestores as the unit length of described ethernet line
Resistance.
Embodiment of the present invention second aspect one power supply unit, including:
Acquisition module, for obtaining the resistance of the ethernet line between PSE and PD to be powered；
Processing module, for according to the output voltage of described PSE, described PSE obtain in advance with described
The resistance calculations consulting power and described ethernet line of PD compensates power；
Described processing module be additionally operable to using described negotiation power and described compensation power and as output work
Rate；
Output module, for powering to described PD by described ethernet line according to described output.
In conjunction with second aspect, in the first possible embodiment of second aspect, described acquisition module
Specifically include:
Detector unit, for detecting the length of described ethernet line；
Acquiring unit, for obtaining the resistance of the unit length of described ethernet line；
Computing unit, for the electricity by the unit length of the length of described ethernet line and described ethernet line
Resistance is multiplied and obtains the resistance of described ethernet line.
In conjunction with the first possible embodiment of second aspect, the reality that the second in second aspect is possible
Execute in mode, described detector unit specifically for:
Under described PSE idle condition, use the ethernet line that PSE described in VCT technology for detection connects,
To obtain the first length；
When effective PD being detected, described in employing VCT technology for detection between PSE and described PD
Ethernet line, to obtain the second length；
Select in described first length and described second length longer as described in the length of ethernet line.
In conjunction with the embodiment that the first or the second of second aspect are possible, at the third of second aspect
In possible embodiment, acquiring unit specifically for:
Send test signal with at least three power to described ethernet line, and send test signal every time
The signal to noise ratio that the described PD of rear acquisition detects；
The signal to noise ratio that described at least three power is corresponding with each power is done linear regression straight to obtain detection
Line, using the slope of described detection of straight lines as detection parameter；
The canonical parameter of described detection parameter with multiple netting twine is compared, chooses and described detection parameter
First netting twine type of proximity；
Using the resistance of the unit length of described first netting twine type as the unit length of described ethernet line
Resistance.
In conjunction with second aspect the first, the second and any one the possible embodiment in the third,
In the 4th kind of possible embodiment of second aspect, described acquiring unit is additionally operable to prestore
The resistance of unit length is as the resistance of the unit length of described ethernet line.
The embodiment of the present invention provides method and the power supply unit of a kind of PoE power back-off, passes through power supply unit
Detect the resistance of ethernet line between itself and power receiving equipment, calculate the power of the upper loss of ethernet line,
I.e. be calculated the compensation power of needs, power supply unit again using this compensation power plus consult power as to
The output of this power receiving equipment output, the output after compensation after ethernet line loss,
Power receiving equipment still can get enough power and be operated, and is prevented effectively from the situation of power-on and power-off repeatedly.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to required in embodiment
Accompanying drawing to be used does one and introduces simply, it should be apparent that, the accompanying drawing in describing below is the present invention
Some embodiments, for those of ordinary skill in the art, in the premise not paying creative work
Under, it is also possible to other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is the flow chart of the embodiment of the method one of PoE power back-off of the present invention；
Fig. 2 is the flow chart of the embodiment of the method two of PoE power back-off of the present invention；
Fig. 3 be PoE power back-off of the present invention method example in obtain the flow chart of length of ethernet line；
Fig. 4 is the structural representation of power supply unit embodiment one of the present invention；
Fig. 5 is the structural representation of power supply unit embodiment two of the present invention；
Fig. 6 is the structural representation of power supply unit embodiment three of the present invention.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with this
Accompanying drawing in bright embodiment, is explicitly described the technical scheme in the embodiment of the present invention.Based on this
Embodiment in invention, those of ordinary skill in the art are obtained under not making creative work premise
Every other embodiment, broadly fall into the scope of protection of the invention.
Fig. 1 is the flow chart of the embodiment of the method one of PoE power back-off of the present invention, as it is shown in figure 1, should
Specifically comprising the following steps that of method
S101:PSE obtains the resistance of the ethernet line between described PSE and PD to be powered.
It is connected by ethernet line between PSE with PD, ethernet line power loss in power supply process.
PSE can obtain the resistance of the ethernet line that other equipment provides, can be manual defeated with receiving network managing person
The resistance of the ethernet line entered, it is also possible to the mode of detection, the side of the most following embodiment illustrated in fig. 2
Formula, obtains the resistance of ethernet line.
S102: described PSE according to the output voltage of described PSE, described PSE obtain in advance with institute
The resistance calculations consulting power and described ethernet line stating PD compensates power.
After getting the resistance of ethernet line between PSE and PD, in conjunction with consulting power, PSE
Output voltage can calculate the power that may be lost obtaining on ethernet line.Compensate power for compensate with
The power that too netting twine may be lost.
S103: described PSE using described negotiation power and described compensation power and as output.
S104: described PSE is powered to described PD by described ethernet line according to described output.
PSE powers to described PD according to described output and to refer to that PSE powers to PD detecting
Power is less than or equal to keeping during described output powering PD, it is not required that PSE powers to PD
Actual power necessarily reaches described output.
If in the usual manner, i.e. power to described PD according to negotiation power, then PSE is detecting
Stop powering to PD more than when consulting power to the power that PD powers, be now lost except ethernet line
Power, the power that PD actually obtains still does not reaches negotiation power.Therefore, in the embodiment of the present invention
PSE is adding, on the basis of the negotiation power of PD, the compensation power that calculating obtains, then powers to PD,
Ensure the power also enough PD work after loss on ethernet line.
The method of the PoE power back-off that the present embodiment provides, detects itself and power receiving equipment by power supply unit
Between the resistance of ethernet line, calculate the power of the upper loss of ethernet line, be i.e. calculated needs
Compensate power, power supply unit again using this compensation power plus consulting power as exporting to this power receiving equipment
Output, the output after compensation is after ethernet line loss, and power receiving equipment still can
Enough get enough power to be operated, be prevented effectively from the situation of power-on and power-off repeatedly.
Fig. 2 is the flow chart of the embodiment of the method two of PoE power back-off of the present invention, as in figure 2 it is shown,
On the basis of above-described embodiment, in step S101, PSE obtains between described PSE and PD to be powered
The concretely comprising the following steps of resistance of ethernet line:
S201: the described PSE length detecting described ethernet line.
In the present embodiment, being implemented as follows of the ethernet line that PSE detection connects:
First, described PSE is in an idle state (before this idle condition refers to not recognize PD
State in which), (English: Vitual Cable Test is called for short: VCT) to use the detection of virtual cable
The ethernet line that PSE described in technology for detection connects, to obtain the first length.This first length can be many
The meansigma methods of secondary testing result.If PSE not yet connects ethernet line, then a length of the zero of ethernet line.
If obtaining in the first length, and repeated detection result existing zero also by the meansigma methods of repeated detection result
Having non zero results, the most only non zero results participates in average.
Secondly, described PSE, when effective PD being detected, uses PSE described in VCT technology for detection
And the ethernet line between described PD, obtains the second length.This second length can be repeated detection knot
The meansigma methods of fruit.
Finally, during described PSE selects described first length and described second length, longer conduct detects
PSE and PD between the length of ethernet line.
The resistance of S202: the described PSE unit length obtaining described ethernet line.
In the present embodiment, after having got the ethernet line length between PSE and PD, need to know
Resistance in the unit length of this ethernet line of road, PSE obtains the electricity in the unit length of this ethernet line
The mode of resistance includes following several:
First kind of way, in the case of PSE and PD all supports the acquisition of signal to noise ratio parameter, described PSE
Test signal is sent to described ethernet line with at least three power, and when sending after test signal every time
Obtain the signal to noise ratio that described PD detects.Get the signal to noise ratio of PD corresponding at least three power.
Such as, PSE can pass through Link Layer Discovery Protocol (English: Link Layer Discovery Protocol,
It is called for short: LLDP) obtain, from PD, the signal to noise ratio that PD detects.
Then, the signal to noise ratio that described at least three power is corresponding with each power is done linear returning by described PSE
Return to obtain detection of straight lines, using the slope of described detection of straight lines as detection parameter.Described PSE is by described
The canonical parameter of detection parameter and multiple netting twine is compared, and chooses the with described detection parameter proximity
One netting twine type；Wherein, conventional linear regression uses method of least square, can also select in this application
Realize by other linear regression mode.The canonical parameter of above-mentioned multiple netting twine is stored in advance in PSE.
Finally, described PSE using the resistance of the unit length of described first netting twine type as described Ethernet
The resistance of the unit length of line.
The resistance per unit length of the netting twine of each type is stored in PSE, according to above-mentioned comparison, by institute
State ethernet line and be considered the netting twine of the immediate first netting twine type of canonical parameter.
The second way, described PSE using the resistance of unit length that prestores as described ethernet line
The resistance of unit length.Wherein, the resistance of this unit length prestored is existing various netting twine
In, the maximum of the resistance of unit length, i.e. consider the situation that netting twine quality is worst.Implement process
In can directly in PSE storage meet the resistance of unique unit length of above-mentioned condition, it is also possible to deposit
Store up the resistance of the unit length of various netting twine, PSE select maximum of which one to be worth as described ether
The resistance of the unit length of netting twine.
If PSE supports the acquisition of signal to noise ratio parameter, but the PD being connected with PSE can not support noise
The ratio acquisition of parameter, PSE is attempting using the resistance of the unit length of first kind of way acquisition ethernet line
Time unsuccessful, according to the second way, the resistance of the unit length that will prestore is as described ether
The resistance of the unit length of netting twine.Specifically, the resistance of the unit length prestored is the institute of PSE storage
Have type netting twine resistance per unit length in maximum one.
S203: described PSE by the length of described ethernet line and the electricity of the unit length of described ethernet line
Resistance is multiplied and obtains the resistance of described ethernet line.
On the basis of above-mentioned Fig. 1 and embodiment illustrated in fig. 2, get between PSE and PD with
Too after netting twine resistance, PSE described in S102 is according to the output voltage of described PSE, obtain in advance
Obtain with the resistance calculations consulting power and this ethernet line of described PD and compensate power consumption.
Described PSE can obtain after PD classification completes or after obtaining the resistance of ethernet line
The negotiation power of described PSE and described PD.
Then, according to output voltage, the resistance of described ethernet line and the described negotiation power of described PSE
Calculate and obtain described compensation power consumption.The power that ethernet line consumes and this ethernet line resistance and this ether
The electric current passed through on netting twine is correlated with.The maximum current that may pass through on the negotiation the biggest ethernet line of power is more
Greatly, therefore can consume according to output voltage, the resistance of ethernet line and negotiation power calculation ethernet line
Power, the value of this power equal to compensate power consumption.Concrete computing formula is as follows:
PCom=RL×(PN/VPSE)2；Wherein, PNRepresent described PSE and described PD to consult successfully to consult
Power, VPSERepresent the output voltage of described PSE, RLRepresent the resistance of described ethernet line, PComRepresent
Loss power on described ethernet line, the most described compensation power.
Finally, the power that compensates of above-mentioned acquisition is added that negotiation power is as the output to described PD by PSE
Power, and being powered to PD according to this output, it is achieved by signal and processing data information
Mode obtains the resistance of the ethernet line between PSE to PD.
In conjunction with the embodiment shown in above-mentioned Fig. 1 and Fig. 2, below by example to technical scheme
It is described in detail, specific as follows:
The technical program by PSE system obtain by the way of signal and processing data information PSE to PD it
Between the resistance mode of ethernet line realize the dynamic compensation to output, specific works flow process is main
It is divided into three steps:
The first step, accurately acquisition ethernet line length
Fig. 3 be PoE power back-off of the present invention method example in obtain ethernet line length flow chart, as
Shown in Fig. 3, implementing step is:
S301: under the IDlE state of PSE, PSE use the length of VCT technology for detection port ethernet line,
Obtain the first length L0 of ethernet line.
In the present embodiment, netting twine is formed 12,36,45,78 4 pairs of differential lines pair by 8 twisted-pair feeders, point
Not Biao Shi A B C D line pair, VCT detection each time obtains the length of four pairs of ethernet lines of an interface simultaneously
Degree, uses l respectivelyA,lB,lC,lDRepresent, through too much taking turns test under the IDlE state of PSE, it is thus achieved that every pair of ether
Statistics l of test result taken turns by netting twine moren=[l1,l2,…lm], due to the most each pair of ethernet line physical link state
Basically identical, ethernet line length L0:4 a pair VCT every to ethernet line can be obtained according to following methods
Test result application mathematical statistics method, such as uses the analysis method of discrete data Gauss distribution,
Expected value L to every a pair ethernet line lengthA,LB,LC,LD, the then expectation to above-mentioned 4 pairs of ethernet lines
Value obtains the first ethernet line length L0 after taking root-mean-square.
S302:PSE detects when PD inserts, and is again started up VCT detection, it is thus achieved that the second length L1.
In the present embodiment, PSE, after detecting that PD is already inserted into network interface, tests through repeatedly VCT,
The 4 pair ethernet line states corresponding due to network interface are inconsistent, as a example by gigabit network interface docks, under different mode
Corresponding power supply ethernet line is to difference, and wherein 2 to being in power supply, and VCT result of detection is due to PD
The impact of tolerance limit impedance, power supply circuits silhouette rings relatively big, and ethernet line length is selected will be respectively by 12,36
Line to and 45,78 lines test is added up, make even office's value by choosing big two couple of numerical value after root-mean-square
Obtain the second length L1.
S303:PSE is according to selecting the length as ethernet line longer in L0 and L1.
In the present embodiment, VCT under IDLE state, PD insert state is tested value L0, the L1 obtained
Compare, owing to the VCT detection process in step S402 suffers from opposite end PD impact, formerly connect net
Line is inserted under the scene of PD again, and L0 value is commonly greater than L1；First inserting PD and connect netting twine mouth again, the value of L1 is the biggest
In L0 (L0=0m)；Can by selecting the big ethernet line length value as PSE to load P D of numerical value,
It is formulated: length L=max (L0, L1, L2) of ethernet line.
Optionally, it is also possible to detect that PD classification completes at PSE, after confirming that classification completes, one is restarted
Wheel VCT detection, again obtains length L2, then selects the length of ethernet line from three length
Degree L=max (L0, L1, L2).
PSE is by applying reliable VCT to detect pattern, and the resistance evading ethernet line causes VCT to detect number
According to inconsistent, it is ensured that linkage length is accurately, reliably.
Second step, identification ethernet line standard, adaptation impedence parameter
Being broadly divided into 4 steps, PSE sends the test signal of different capacity to PD, then accesses PD and obtains
Take the signal to noise ratio that each power is corresponding, PSE measure the PD of the opposite end under different transmit power signal to noise ratio
Value, this signal to noise ratio parameter directly reflects network channel transmission performance, under ideal conditions, under same length,
The corresponding different transmit power of the signal to noise ratio of dissimilar netting twine.
Then PSE does linear regression according to the signal to noise ratio that multiple transmitting power are corresponding with each transmitting power,
Obtain detection of straight lines.Concrete, in the case of same length of mesh wire, the repeatedly different transmit power of statistics
Under the conditions of receiving terminal detection signal to noise ratio parameter, owing to the data chosen are random data, pass through
Data statistics algorithm carries out data matching, can use simple least square fitting, in addition with one
A little optimized algorithms, such as based on BP network model Fuzzy Perceptron Model regression analysis, based on BP
The regression analysis of algorithm of neural network, regression analysis based on genetic algorithm, these methods pair
In all concrete well effect of this kind of data matching.
By the detection parameter (i.e. the slope of this detection of straight lines) of described detection of straight lines with as each under length
The normal line parameter planting netting twine is compared, it is considered to harsh conditions, the signal to noise ratio of matching and the merit of transmission
The adaptive parameter of the oblique line of rate, to low-grade ethernet line parameter adaptation, is chosen with described detection parameter
First netting twine type of proximity；PSE using the resistance of the unit length of described first netting twine type as described
The resistance of the unit length of ethernet line is (permissible according to ISO/IEC TR 29125 and TIA TSB-184 standard
Obtain the resistance of this ethernet line unit length).
3rd step, dynamic compensation line loss, fine-grained management power consumption
The ethernet line length arrived by accurately detecting and the resistance of ethernet line unit length, PSE according to
The performance number that PD needs dynamically carries out power back-off
Compensation horse-power formula is as follows: PCom=RL×(PN/VPSE)2；Wherein, PNRepresent described PSE and described
PD consults successfully to consult power, VPSERepresent the output voltage of described PSE, RLRepresent described Ethernet
The resistance of line, PComRepresent the loss power on described ethernet line, the most described compensation power.
In sum: the ethernet line link between PSE and PD, PSE by VCT detection obtain with
Too length of mesh wire data, by obtaining transmitting terminal and the transmitting power of receiving terminal and signal to noise ratio parameter, pass through
Mathematical statistics and data fitting algorithms accurately obtain ethernet line length, it is thus achieved that ethernet line type, finally
Dynamic compensation line loss is carried out, it is achieved PSE limited power according to consulting performance number between PSE and PD
Utilize and maximize.
Fig. 4 is the structural representation of power supply unit embodiment one of the present invention, as shown in Figure 4, the present embodiment
Middle power supply unit is called for short PSE, then this power supply unit 10, including: acquisition module 11, processing module 12
With output module 13.Wherein,
Acquisition module 11, for obtaining the Ethernet between power supply unit and powered device PD to be powered
The resistance of line；
Processing module 12, compensates power for the resistance calculations according to described ethernet line；
Described processing module be additionally operable to by obtain in advance with the negotiation power of described PD and described compensation merit
Rate and as output；
Output module 13, for powering to described PD according to described output.
The power supply unit that the present embodiment provides, for performing the technical scheme of embodiment of the method, it realizes former
Manage similar with technique effect, detected the resistance of ethernet line between itself and power receiving equipment by acquisition module,
Processing module calculates the power of the upper loss of ethernet line, is i.e. calculated the compensation power of needs, power supply
Equipment again using this compensation power plus consult power as the output exported to this power receiving equipment, to PD
Power supply, the output after compensation is after ethernet line loss, and power receiving equipment still can obtain
Get enough power to be operated, be prevented effectively from the situation of power-on and power-off repeatedly.
Fig. 5 is the structural representation of power supply unit embodiment two of the present invention, as it is shown in figure 5, in above-mentioned reality
On the basis of executing example, described acquisition module 11 specifically includes:
Detector unit 111, for detecting the length of described ethernet line；
Acquiring unit 112, for obtaining the resistance of the unit length of described ethernet line；
Computing unit 113, for by the length of described ethernet line and the unit length of described ethernet line
Resistance be multiplied and obtain the resistance of described ethernet line.
Optionally, described detector unit 111 specifically for:
Under described PSE idle condition, use the ethernet line that PSE described in VCT technology for detection connects,
To obtain the first length；
When effective PD being detected, described in employing VCT technology for detection between PSE and described PD
Ethernet line, to obtain the second length；
Select in described first length and described second length longer as described in the length of ethernet line.
Optionally, acquiring unit 112 specifically for:
Send test signal with at least three power to described ethernet line, and send test signal every time
The signal to noise ratio that the described PD of rear acquisition detects；
The signal to noise ratio that described at least three power is corresponding with each power is done linear regression straight to obtain detection
Line, using the slope of described detection of straight lines as detection parameter；
The canonical parameter of described detection parameter with multiple netting twine is compared, chooses and described detection parameter
First netting twine type of proximity；
Using the resistance of the unit length of described first netting twine type as the unit length of described ethernet line
Resistance.
Optionally, described acquiring unit 112 is additionally operable to the resistance of unit length that prestores as institute
State the resistance of the unit length of ethernet line.
The power supply unit that the present embodiment provides, for performing the arbitrary shown embodiment of the method for Fig. 1 to Fig. 3
Technical scheme, it is similar with technique effect that it realizes principle, does not repeats them here.
Fig. 6 is the structural representation of power supply unit embodiment three of the present invention, and as shown in Figure 6, this power supply sets
Standby 20, including: processor 21, Ethernet chip 22, PSE chip 23 and ethernet port 24 and
Memorizer 25.This processor 21 is connected with ethernet port 24 by Ethernet chip 22, and this PSE
Chip is connected with processor 21 and ethernet port 24 the most respectively, and this memorizer 25 is connected with processor,
The most as shown in Figure 6.
Processor 21 can be central processing unit (English: central processing unit, abbreviation: CPU)
Or CPU and the combination of other elements.PSE chip 23 is designed to meet PoE protocol requirement
In the chip of PSE function, be generally provided that detection is (English: detection) function.Some PSE
It is (English: classification) function that chip may be provided for classification.Common PSE chip has U.S. letter collection
Become product (English: MAX5952 and MAX5971B Maxim Integrated), Texas Instrument's (English
Literary composition: TPS23841 and TPS23851 Texas Instruments), and it is (English: Linear to insult Li Erte
Technology) LTC4266, LTC4270, LTC4274 and LTC4290 etc..Ethernet chip
22 is conventional that have the several manufacturer production of Marvell, Broadcom and Realtek, and concrete product includes:
BCM54680,88E1680, BCM5241,88E1512, RTL8168 and RTL8111 etc..Ether
Net port 24 is can to connect to be powered between PSE and PD and the port of data transmission, conventional with
Too net port is RJ45 network interface.
Processor 21 obtains the resistance of the ethernet line between this power supply unit and PD to be powered, should be with
Too netting twine is connected with ethernet port 24, and Ethernet chip 22 is for providing data to ethernet port；
Described processor 21 is additionally operable to the resistance calculations according to described ethernet line and compensates power；
Described processor 21 be additionally operable to by obtain in advance with the negotiation power of described PD and described compensation merit
Rate and as output；
Memorizer 25 is used for storing the negotiation power that described processor obtains in advance, the compensation merit calculating acquisition
The data such as rate, output.This memorizer 25 can include that volatile memory is (English: volatile
Memory), such as random access memory (English: random-access memory, abbreviation: RAM)；
Memorizer 25 can also include that nonvolatile memory is (English: non-volatile memory), such as
Flash memory (English: flash memory), hard disk (English: hard disk drive, abbreviation:
HDD) or solid state hard disc (English: solid-state drive, abbreviation: SSD)；Memorizer 25 also may be used
To include the combination of the memorizer of mentioned kind.
Described processor 21 is additionally operable to control PoE chip 23 and passes through ethernet side according to described output
Mouth 24 is powered to described PD.
The power supply unit that the present embodiment provides, for performing the technical scheme of embodiment of the method, it realizes former
Manage similar with technique effect, by the ethernet line between processor acquisition power supply unit and power receiving equipment
Resistance, processor calculates the power of the upper loss of ethernet line, is i.e. calculated the compensation power of needs,
Again using this compensation power plus consulting power as the output exported to this power receiving equipment, then control
PoE chip is powered to PD by ethernet port, and the output after compensation is transmitting through ethernet line
After loss, power receiving equipment still can get enough power and be operated, and is prevented effectively from the situation of power-on and power-off repeatedly.
In power supply unit embodiment four of the present invention, concrete Ethernet chip 22 is used for obtaining described ether
The resistance of the unit length of netting twine；
Described processor 21 is for by the length of described ethernet line and the unit length of described ethernet line
Resistance be multiplied and obtain the resistance of described ethernet line.
Further, described PSE chip is under described PSE idle condition, and Ethernet chip 22 uses
The ethernet line that PSE described in VCT technology for detection connects, to obtain the first length；
Described PSE chip is when effective PD being detected, and Ethernet chip 22 uses VCT technology to examine
Survey the ethernet line between described PSE and described PD, to obtain the second length；
Described processor 21 is additionally operable to select conduct longer in described first length and described second length
The length of described ethernet line.
Optionally, Ethernet chip 22 is specifically for using at least three power to send to described ethernet line
Test signal, described processor 21 obtains institute after described Ethernet chip 22 sends test signal every time
State the signal to noise ratio that PD detects；
The signal to noise ratio that described processor 21 is additionally operable to described at least three power is corresponding with each power is done
Linear regression is to obtain detection of straight lines, using the slope of described detection of straight lines as detection parameter；
Described processor 21 is additionally operable to compare the canonical parameter of described detection parameter with multiple netting twine,
Choose and the first netting twine type of described detection parameter proximity；
Described processor 21 is additionally operable to the resistance of the unit length using described first netting twine type as described
The resistance of the unit length of ethernet line.
Described processor 21 is additionally operable to the resistance of unit length that prestores as described ethernet line
The resistance of unit length.
The power supply unit that the present embodiment provides, for performing the arbitrary shown embodiment of the method for Fig. 1 to Fig. 3
Technical scheme, it is similar with technique effect that it realizes principle, does not repeats them here.
In the embodiment of above-mentioned power supply unit, it should be appreciated that this processor can be CPU (English
Literary composition: Central Processing Unit, is called for short: CPU), it is also possible to be other general processors, numeral
Signal processor (English: Digital Signal Processor, DSP), special IC (English it is called for short:
Literary composition: Application Specific Integrated Circuit, is called for short: ASIC) etc..General processor can
To be microprocessor or this processor can also be the processor etc. of any routine.Implement in conjunction with the present invention
The step of the method disclosed in example can be embodied directly in hardware processor and perform, or uses processor
In hardware and software module combination execution complete.
One of ordinary skill in the art will appreciate that: realize all or part of step of above-mentioned each method embodiment
Suddenly can be completed by the hardware that programmed instruction is relevant.Aforesaid program can be stored in a computer can
Read in storage medium.This program upon execution, performs to include the step of above-mentioned each method embodiment；And
Aforesaid storage medium includes: read only memory (English: read-only memory, abbreviation: ROM),
RAM, flash memory, hard disk, solid state hard disc, tape are (English: magnetic tape), floppy disk
(English: floppy disk), CD (English: optical disc) and combination in any.
Various embodiments above only in order to technical scheme to be described, is not intended to limit；Although reference
The present invention has been described in detail by foregoing embodiments, it will be understood by those within the art that:
Technical scheme described in foregoing embodiments still can be modified by it, or to wherein part or
Person's all technical characteristic carries out equivalent；And these amendments or replacement, do not make appropriate technical solution
Depart from the scope of claim.
Claims (10)
1. the method for a PoE power back-off, it is characterised in that including:
Power supply unit PSE obtains the ethernet line between described PSE and powered device PD to be powered
Resistance；
Described PSE according to the output voltage of described PSE, described PSE obtain in advance with described PD's
The resistance calculations consulting power and described ethernet line compensates power；
Described PSE using described negotiation power and described compensation power and as output；
Described PSE is powered to described PD by described ethernet line according to described output.
Method the most according to claim 1, it is characterised in that described PSE obtains described PSE
And the resistance of the ethernet line between powered device PD to be powered, including:
Described PSE detects the length of described ethernet line；
Described PSE obtains the resistance of the unit length of described ethernet line；
The length of described ethernet line is multiplied by described PSE with the resistance of the unit length of described ethernet line
Obtain the resistance of described ethernet line.
Method the most according to claim 2, it is characterised in that described PSE detects described ether
The length of netting twine, including:
Described PSE in an idle state, uses PSE described in virtual cable detection VCT technology for detection even
The ethernet line connect, to obtain the first length；
Described PSE, when effective PD being detected, uses PSE described in VCT technology for detection with described
Ethernet line between PD, to obtain the second length；
Described PSE selects ethernet line described in conduct longer in described first length and described second length
Length.
The most according to the method in claim 2 or 3, it is characterised in that described PSE obtains described
The resistance of the unit length of ethernet line, including:
Described PSE at least three power sends test signal to described ethernet line, and is sending every time
Obtain, after test signal, the signal to noise ratio that described PD detects；
The signal to noise ratio that described at least three power is corresponding with each power is done linear regression to obtain by described PSE
Take detection of straight lines, using the slope of described detection of straight lines as detection parameter；
The canonical parameter of described detection parameter with multiple netting twine is compared by described PSE, chooses with described
First netting twine type of detection parameter proximity；
Described PSE using the resistance of the unit length of described first netting twine type as the list of described ethernet line
The resistance of bit length.
5. according to the method described in any one of claim 2 to 4, it is characterised in that described PSE obtains
Take the resistance of the unit length of described ethernet line, including:
Described PSE using the resistance of unit length that prestores as the unit length of described ethernet line
Resistance.
6. a power supply unit, it is characterised in that including:
Acquisition module, for obtaining the ether between power supply unit PSE and powered device PD to be powered
The resistance of netting twine；
Processing module, for according to the output voltage of described PSE, described PSE obtain in advance with described
The resistance calculations consulting power and described ethernet line of PD compensates power；
Described processing module be additionally operable to using described negotiation power and described compensation power and as output work
Rate；
Output module, for powering to described PD by described ethernet line according to described output.
Power supply unit the most according to claim 6, it is characterised in that described acquisition module specifically wraps
Include:
Detector unit, for detecting the length of described ethernet line；
Acquiring unit, for obtaining the resistance of the unit length of described ethernet line；
Computing unit, for the electricity by the unit length of the length of described ethernet line and described ethernet line
Resistance is multiplied and obtains the resistance of described ethernet line.
Power supply unit the most according to claim 7, it is characterised in that described detector unit is specifically used
In:
Under described PSE idle condition, use PSE described in virtual cable detection VCT technology for detection even
The ethernet line connect, to obtain the first length；
When effective PD being detected, described in employing VCT technology for detection between PSE and described PD
Ethernet line, to obtain the second length；
Select in described first length and described second length longer as described in the length of ethernet line.
9. according to the power supply unit described in claim 7 or 8, it is characterised in that acquiring unit is specifically used
In:
Send test signal with at least three power to described ethernet line, and send test signal every time
The signal to noise ratio that the described PD of rear acquisition detects；
The signal to noise ratio that described at least three power is corresponding with each power is done linear regression straight to obtain detection
Line, using the slope of described detection of straight lines as detection parameter；
The canonical parameter of described detection parameter with multiple netting twine is compared, chooses and described detection parameter
First netting twine type of proximity；
Using the resistance of the unit length of described first netting twine type as the unit length of described ethernet line
Resistance.
10. according to the power supply unit described in any one of claim 6 to 9, it is characterised in that described in obtain
Take unit to be additionally operable to the resistance of unit length that prestores as the unit length of described ethernet line
Resistance.
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| CN201510065184.4A CN105991294B (en) | 2015-02-09 | 2015-02-09 | The method and power supply unit of PoE power compensation |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107589322A (en) * | 2017-08-15 | 2018-01-16 | 上海斐讯数据通信技术有限公司 | A kind of power supply unit, power receiving equipment and its method for detecting length of mesh wire |
| WO2018149325A1 (en) * | 2017-02-14 | 2018-08-23 | 中兴通讯股份有限公司 | Reverse power feeding method and device |
| CN109921914A (en) * | 2019-04-12 | 2019-06-21 | 上海剑桥科技股份有限公司 | POE equipment |
| CN113381501A (en) * | 2021-06-23 | 2021-09-10 | 广东优力普物联科技有限公司 | Device for automatically identifying insertion of PD equipment |
| EP3915223A4 (en) * | 2019-03-20 | 2022-09-07 | CommScope Technologies LLC | Systems and methods for infrastructure management system based power sourcing equipment power allocation |
| CN117135001A (en) * | 2023-10-26 | 2023-11-28 | 茂睿芯（深圳）科技有限公司 | Method, system and readable storage medium for controlling power maintaining feature |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030122551A1 (en) * | 2001-12-28 | 2003-07-03 | Texas Instruments Incorporated | Resistance measurement system |
| US20060164062A1 (en) * | 2005-01-25 | 2006-07-27 | Linear Technology Corporation | Distinguishing network interface card from short circuit condition in power over ethernet system |
| CN101192938A (en) * | 2006-11-30 | 2008-06-04 | 美国博通公司 | Ethernet power supply system and method |
| CN102594573A (en) * | 2011-01-06 | 2012-07-18 | 上海戴河易信息科技有限公司 | Ethernet power supply sensor network |
| CN103220155A (en) * | 2013-04-02 | 2013-07-24 | 京信通信系统（中国）有限公司 | Current expanding method, power device (PD) and power over Ethernet (POE) system |
-
2015
- 2015-02-09 CN CN201510065184.4A patent/CN105991294B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030122551A1 (en) * | 2001-12-28 | 2003-07-03 | Texas Instruments Incorporated | Resistance measurement system |
| US20060164062A1 (en) * | 2005-01-25 | 2006-07-27 | Linear Technology Corporation | Distinguishing network interface card from short circuit condition in power over ethernet system |
| CN101192938A (en) * | 2006-11-30 | 2008-06-04 | 美国博通公司 | Ethernet power supply system and method |
| CN102594573A (en) * | 2011-01-06 | 2012-07-18 | 上海戴河易信息科技有限公司 | Ethernet power supply sensor network |
| CN103220155A (en) * | 2013-04-02 | 2013-07-24 | 京信通信系统（中国）有限公司 | Current expanding method, power device (PD) and power over Ethernet (POE) system |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018149325A1 (en) * | 2017-02-14 | 2018-08-23 | 中兴通讯股份有限公司 | Reverse power feeding method and device |
| CN107589322A (en) * | 2017-08-15 | 2018-01-16 | 上海斐讯数据通信技术有限公司 | A kind of power supply unit, power receiving equipment and its method for detecting length of mesh wire |
| CN107589322B (en) * | 2017-08-15 | 2020-08-07 | 浙江智动科技有限公司 | Power supply equipment, powered equipment and method for detecting network cable length |
| EP3915223A4 (en) * | 2019-03-20 | 2022-09-07 | CommScope Technologies LLC | Systems and methods for infrastructure management system based power sourcing equipment power allocation |
| CN109921914A (en) * | 2019-04-12 | 2019-06-21 | 上海剑桥科技股份有限公司 | POE equipment |
| CN109921914B (en) * | 2019-04-12 | 2021-04-06 | 上海剑桥科技股份有限公司 | POE equipment |
| CN113381501A (en) * | 2021-06-23 | 2021-09-10 | 广东优力普物联科技有限公司 | Device for automatically identifying insertion of PD equipment |
| CN113381501B (en) * | 2021-06-23 | 2022-12-09 | 广东优力普物联科技有限公司 | Device for automatically identifying insertion of PD equipment |
| CN117135001A (en) * | 2023-10-26 | 2023-11-28 | 茂睿芯（深圳）科技有限公司 | Method, system and readable storage medium for controlling power maintaining feature |
| CN117135001B (en) * | 2023-10-26 | 2024-02-06 | 茂睿芯（深圳）科技有限公司 | Method, system and readable storage medium for controlling power maintaining feature |
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|---|---|
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