CN106341237A - POE (Power Over Ethernet) system based PSE (Power Sourcing Equipment) power supply method and device - Google Patents
POE (Power Over Ethernet) system based PSE (Power Sourcing Equipment) power supply method and device Download PDFInfo
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- CN106341237A CN106341237A CN201510392015.1A CN201510392015A CN106341237A CN 106341237 A CN106341237 A CN 106341237A CN 201510392015 A CN201510392015 A CN 201510392015A CN 106341237 A CN106341237 A CN 106341237A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/10—Current supply arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
- H04L12/40045—Details regarding the feeding of energy to the node from the bus
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Abstract
The invention discloses a POE (Power Over Ethernet) system based PSE (Power Sourcing Equipment) power supply method and device. The method comprises the steps that PSE acquires a power limit value of an access port of a PD (Powered Device) when connection of the PD is detected; the PSE detects a maximum power value required by the PD through outputting detection voltage to the PD; whether the power remaining amount is no less than the maximum power value required by power supply for the PD or not is detected when the power limit value of the access port of the PD is not less than the maximum power value required by the PD; and power supply of current power supply ports is cut off in an ascending order based on the priority until the power remaining mount is not less than the maximum power value required by power supply for the PD when the detection result is that the power remaining amount is less than the maximum power value required by power supply of the PD, and then power is supplied to the PD. According to the invention, whether the power limit value of the access port of the PD is no less than the maximum power value required by the PD or not is detected, further whether the power remaining amount satisfies power supply for the PD or not is detected, and then power supply of the current power supply ports is cut off in an ascending order based on the priority, so that the stability and the reliability of power supply of the PSE are ensured.
Description
Technical field
The present invention relates to poe system power supply technical field is and in particular to based on poe system
Pse method of supplying power to and device.
Background technology
Poe (power over ethernet, POE) refer to by 10base-t,
100base-tx, 1000base-t Ethernet is powered, and the distance of its reliable power supply is the longest
For 100 meters.In this way, can be the ip photographic head of industry spot, wireless ap,
The equipment such as data collection station carry out remote centralized and power.For these need power supply equipment and
Speech is it is no longer necessary to consider the problem of its power-supply system wiring, while connecting ethernet line just
The power supply to equipment can be realized.
According to the definition of ieee802.3af standard, poe electric power system comprises two kinds of equipment pse
(powered device, is subject to for (power sourcing equipment, power supply unit) and pd
Electric equipment).Pse equipment includes manual mode and automatic mode to the power supply mode of pd equipment,
Wherein:
In a manual mode, pse to pd electrifying timing sequence according to arrive first first algorithm controls.
In pse supplying power for outside in the case of fully loaded, access if there are new pd equipment, no
Consider priority, original power supply state is not made any changes.For example, the power supply of a port
Priority is set to critical, in the case of pse supplying power for outside fully loaded, if
A has accessed port new pd equipment, and pse only points out new pd equipment to access and electricity
The not enough information of source power, the equipment that a port will not be accessed is powered.
In automatic mode, pse is as shown in Figure 1 to the power supply flow process of pd.Pse is to pd
Before formal power supply, pse equipment detects whether pd equipment is standard pd first, works as detection
To opposite end be standard pd equipment when, detecting voltage is sent by hand shaking mechanism, obtains pd
Required maximum power dissipation, starts formally to power to pd equipment.In pse supplying power for outside close to full
In the case of load, the pd equipment that preferentially port for critical connects to priority is carried out
Power supply；The pd equipment that the port for high connects for priority that takes second place is powered, excellent to powering
The pd equipment that the minimum port of first level is accessed carries out power down process.For example: the power supply of a port
Priority is set to critical, in the case of pse supplying power for outside fully loaded, if
A has accessed port new pd equipment, the port access that pse can be minimum to power supply priority
Pd equipment carries out power down process, then the pd equipment that a port is accessed is powered.
Although the priority that this technology can play pse well is powered strategy, when in system
General power not enough when, be also reserved with a port, the priority ratio of this reserved port in system
The priority in the port of power supply is high for system, if field technician's maloperation, will be big
In this reserved port power limits value pd equipment access so that this reserved port seize low
After the port of priority powers, because the actual power that pd equipment is accessed in this reserved port is more than
The Power Limitation of this reserved port, in the case of leading to this reserved port to run out of electricity, also can rob
Account for the port of low priority, low priority port ceaselessly carries out alternately power-on and power-off, finally occurs
There are two ports and be all unable to normal power supply in power supply environment.
For example, whole poe electric power system has 80w general power, the power supply priority of a port
For critical, Power Limitation is 30w, and the power supply priority of b port is high, and power limits
It is made as 20w；The power supply priority of c port is low, and Power Limitation is 30w.If used
Family first powers to a port, then c port is powered, at this moment already consumed by 60w power consumption,
Power supply residue power consumption is 20w, and now manager carries out Power Limitation to b port and is configured to
20w, the equipment being 30w when the load that field technician accesses, the built-in algorithms of pse
C port will be seized be powered, finally result in c port and b port all can not power
Bad situation.
Content of the invention
For defect of the prior art, the invention provides a kind of pse based on poe system
Method of supplying power to and device so that under pse supplying power for outside is close to full load situation, if there are new
Pd access, can accurately determine whether this pd is powered, ensure pse supplying power for outside
Stability and reliability.
In a first aspect, the present invention provides a kind of pse method of supplying power to based on poe system, comprising:
When pse detects pd and connects, obtain the power limit of described pd access interface；
Pse passes through to export maximum power value needed for the detecting voltage described pd of detection to described pd；
When the power limit of described pd access interface is not less than maximum power value needed for described pd
When, whether detection power supply surpluses power required maximum power value not less than described pd；
When testing result for no when, according to priority order from low to high cuts off current supply port
Power supply, until power supply surpluses are powered required maximum power value not less than described pd, and then
Described pd is powered.
Optionally, after pse detects pd connection, methods described also includes:
Pse detects whether described pd is standard pd；When the test results is yes, continue to institute
State pd to power；Otherwise, described pd is stopped power supply.
Optionally, methods described also includes:
When the power limit of described pd access interface is less than maximum power value needed for described pd
When, stop described pd is powered.
Optionally, according to priority order from low to high cuts off the power supply of current supply port, directly
Power required maximum power value not less than described pd to power supply surpluses, and then described pd is entered
Row power supply includes:
At least one target port, at least one target described is identified from current supply port
The priority of port is less than the priority of described pd access interface；
According to priority order from low to high, disconnects at least one target port medium priority described
Minimum target port is powered；
Judge that whether current power surpluses power required maximum power value not less than described pd；
When result of determination is to be, described pd is powered；Otherwise, continue cut-out priority time
Low target port is powered, until power supply surpluses are powered required maximum work not less than described pd
Rate value, and then described pd is powered.
Optionally, according to priority order from low to high cut off current supply port power supply until
Power supply surpluses are powered required maximum power value not less than described pd, and then described pd is carried out
After power supply, methods described also includes:
Whether abnormal monitor power supply after described pd powers；When monitoring result is to be, disconnect institute
State pd to power；Otherwise, continue power supply.
Second aspect, present invention also offers a kind of pse electric supply installation based on poe system,
Including:
Power Limitation detection module, for when pse detects pd and connects, obtaining described pd
The power limit of access interface；
Required peak power detection module, for by exporting detecting voltage detection to described pd
Maximum power value needed for described pd；
Power supply surpluses detection module, for the power limit when described pd access interface not
Less than needed for described pd, during maximum power value, whether detection power supply surpluses are not less than described pd
Maximum power value needed for power supply；
Preferential supply module, for when testing result for no when, according to priority from low to high suitable
Sequence cuts off the power supply of current supply port, until power supply surpluses are not less than described pd power supply station
Need maximum power value, and then described pd is powered.
Alternatively, described device also includes:
Power supply cut-out module, for detecting whether described pd is standard pd；When testing result is
When being, continue described pd is powered；Otherwise, described pd is stopped power supply.
Alternatively, described power supply cut-out module, is additionally operable to when the power of described pd access interface
Limits value is less than needed for described pd during maximum power value, stops described pd is powered.
Alternatively, preferential supply module is additionally operable to identify at least one from current supply port
Target port, the priority of at least one target port described is less than described pd access interface
Priority；According to priority order from low to high, disconnects excellent at least one target port described
The minimum target port of first level is powered；Judge whether current power surpluses are not less than described pd
Maximum power value needed for power supply；When result of determination is to be, described pd is powered；No
Then, continue the cut-out low target port of priority time to power, until power supply surpluses are not less than institute
State pd to power required maximum power value, and then described pd is powered.
Alternatively, described device also includes:
Monitoring modular, whether abnormal for monitoring power supply after described pd powers；Work as monitoring result
During for being, disconnecting described pd and powering；Otherwise, continue power supply.
As shown from the above technical solution, the present invention proposes a kind of pse based on poe system and supplies
Method for electrically and device, if pse detects pd and connects, detect this pd access interface first
Whether power limit is not less than maximum power value needed for this pd, if testing result is no,
Stop power supply, field technician's maloperation can be avoided, will be greater than the equipment of power limit
The situation that during access it may appear that this port can not power；If testing result is yes, continue
Power supply, detects whether power supply surpluses meet this pd and power, when pse power supply surpluses further
When can not meet this pd and powering, according to priority order from low to high cuts off current supply port
Power supply, until power supply surpluses disclosure satisfy that pd powers, reached in pse supplying power for outside not
In the case of foot, the expectation that preferentially port high to priority powers.
Described above is only the general introduction of technical solution of the present invention, in order to better understand this
Bright technological means, and being practiced according to the content of description, and in order to allow the present invention
Above and other objects, features and advantages can become apparent, below especially exemplified by the present invention's
Specific embodiment.
Brief description
By reading detailed description, various other advantages and the benefit of hereafter preferred implementation
Those of ordinary skill in the art be will be clear from understanding.Accompanying drawing is only used for illustrating to be preferable to carry out
The purpose of mode, and it is not considered as limitation of the present invention.And in whole accompanying drawing, use
Identical reference markss represent identical part.In the accompanying drawings:
Fig. 1 powers to pd schematic flow sheet for prior art pse；
The pse method of supplying power to based on poe system that Fig. 2 provides for one embodiment of the invention
Schematic flow sheet；
The pse method of supplying power to based on poe system that Fig. 3 provides for another embodiment of the present invention
Schematic flow sheet；
The pse electric supply installation based on poe system that Fig. 4 provides for one embodiment of the invention
Structural representation.
Specific embodiment
In order to ensure stability and the reliability that pse powers, embodiments provide one kind
Pse method of supplying power to based on poe system and device.
It is more fully described the exemplary embodiment of the disclosure below with reference to accompanying drawings.Although accompanying drawing
In show the exemplary embodiment of the disclosure it being understood, however, that can be real in a variety of manners
Show the disclosure and should not be limited by embodiments set forth here.On the contrary, these embodiments are provided
It is able to be best understood from the disclosure, and can be by biography complete for the scope of the present disclosure
Reach to those skilled in the art.
Pse the power supply process of pd is included phase detected signal, the classification stage, powering phase,
For pyroelectric monitor stage and disconnected phase.Wherein: in phase detected signal, pse identifies extension
Whether the pd connecing is standard pd, if recognition result is yes, launches into the classification stage,
Otherwise do not go on power supply, it is to avoid non-standard pd is damaged；In classification stage, pse
With pd hand shaking step by step, the peak power needed for acquisition pd and the power supply rank of pd；Supplying
In the electric stage, when pse check and evaluation is to peak power needed for pd, start formally to power to pd；
In power detection phase, after pse starts power supply, the power supply state that monitor port is periodically flushed,
And report the status informations such as the overload of pd, excessively stream, underpower in time；In the disconnected phase,
Whether port connects pse detection pd.
How mainly propose in the embodiment of the present invention in the close feelings at full capacity of pse supplying power for outside
It is ensured that the stability of pse supplying power for outside and reliability, the power supply process to pd for the pse under condition
In, typically under pse supplying power for outside is close to full load situation, access if there are new pd, excellent
First high to port priority port powers, and the low port of cut-out priority powers, the present embodiment
It is aiming at above-mentioned situation and propose a kind of pse method of supplying power to based on poe system.
Fig. 2 shows the pse method of supplying power to based on poe system that one embodiment of the invention provides
Schematic flow sheet, as shown in figure 1, the method comprises the following steps:
201st, when pse detects pd and connects, obtain the Power Limitation of described pd access interface
Value；
Wherein, this pse is the power supply unit of poe electric power system, is primarily used to set to other
The standby equipment being powered；This pd is the power receiving equipment in poe electric power system, such as ip phone,
Wireless ap (access point, WAP), portable computer, portable equipment charge
The centralized power of the terminals such as device, the POS, photographic head, data acquisition is powered.
It should be noted that after above-mentioned pse detects pd connection, obtaining described pd incoming end
Before the power limit of mouth, pse can detect whether pd is standard pd, when pd is non-standard
During pd, stop this pd is powered, it is to avoid non-standard pd is damaged.Institute in the present embodiment
Standard pd of meaning refers to that meeting ieee802.3 standard defines the feature that pd exists: a. DC impedance
Between 19k～26.5kohm；B. capacitance is less than 150nf.If the feature capacitance-resistance detecting
Do not meet the value of above standard definition, that is, think that opposite equip. is non-standard pd, do not supplied
Electricity.If the feature capacitance-resistance detecting meets the value of above standard definition, power supply will be continued.
202nd, pse passes through to export peak power needed for the detecting voltage described pd of detection to described pd
Value；
Wherein, the detecting voltage value that this pse exports to pd, can for one value or
One scope, the setting of this detecting voltage value can be previously set by technical staff it is also possible to
It is that poe system sets according to current system running status, the embodiment of the present invention does not specifically limit
Fixed.
203rd, when the power limit of described pd access interface is not less than maximum work needed for described pd
During rate value, whether detection power supply surpluses power required maximum power value not less than described pd；
In embodiments of the present invention, when the power limit of this pd access interface is less than this pd institute
During the maximum power value needing, stop this pd is powered.
204th, when testing result for no when, according to priority order cut-out from low to high is current supplies
The power supply of electric port, until power supply surpluses are powered required maximum power value not less than described pd,
And then described pd is powered.
Method provided in an embodiment of the present invention, if pse detects pd and connects, detection first should
Whether the power limit of pd access interface is not less than maximum power value needed for this pd, if inspection
It is no for surveying result, stops power supply, can avoid field technician's maloperation, will be greater than power
The situation that when equipment of limits value accesses it may appear that this port can not power；If testing result
It is yes, then continues power supply, whether detection power supply surpluses meet this pd and power further, when
Pse power supply surpluses can not meet this pd when powering, according to priority order cut-out from low to high
The power supply of current supply port, until power supply surpluses disclosure satisfy that pd powers, has reached
In the case of pse supplying power for outside deficiency, the expectation that preferentially port high to priority powers.
Fig. 3 shows the pse supplier of electricity based on poe system that another embodiment of the present invention provides
The schematic flow sheet of method, as shown in figure 3, the method comprises the following steps:
301st, pse prepares power supply；
302nd, when pse detects pd and connects, judge whether this pd is standard pd；
When result of determination is to be, execution step 304；Otherwise, execution step 303；
In embodiments of the present invention, whether pse, to before the formal power supply of pd, first detects this pd
For standard pd, it is to avoid the power supply of too high voltages is added to non-standard pd equipment, it is caused hinder
Evil.In embodiments of the present invention, pse can be with small voltage (preferably 2.8～10v) detection electricity
Source output lead between DC impedance and capacitance-resistance, to judge that whether opposite end is that the pd of standard sets
Standby.
In the present embodiment, so-called standard pd refers to that meeting ieee802.3 standard defines pd presence
Feature: a. DC impedance is between 19k～26.5kohm；B. capacitance is less than 150nf.As
The feature capacitance-resistance that fruit detects does not meet the value of above standard definition, that is, think that opposite equip. is non-
Standard pd, is not powered.If the feature capacitance-resistance detecting meets above standard definition
Value, will continue power supply.
303rd, stop this pd is powered；
304th, judge whether this pd access interface has Power Limitation；
When result of determination is to be, execution step 305；Otherwise execution step 308；
In practical application scene, can be poe in the case of pse supplying power for outside deficiency
Also it is reserved with a port, power supply surpluses are a certain fixed value in system.In order to make full use of
The remaining resource of power supply, and be not intended in the equipment powered by lower electricity, now user management
This reserved port can be carried out Power Limitation and be configured to this power supply surplus by member；In another reality
In the application scenarios of border or in order to avoid pd transships in particular circumstances, ensure equipment
Safety, Power Limitation is carried out to port.
305th, obtain the power limit of this pd access interface；
In embodiments of the present invention, the specific fields of the memory area of the built-in division of pse are supported to use
The configuration at family and the Power Limitation of inquiry corresponding port.
306th, pse detects maximum power value needed for this pd by exporting detecting voltage to this pd；
For the ease of poe system, power supply is managed, pse needs to judge the electricity consumption of this pd
Amount.In embodiments of the present invention, pse detects the power of pd equipment using a detecting voltage
Rank, limits and power-on time mechanism according to internal current, to shake hands step by step to pd load
Consult.Above-mentioned steps 306 are further comprising the steps of:
3061st, pse exports detecting voltage to pd
Wherein, the detecting voltage value that this pse exports to pd, can for one value or
One scope, the setting of this detecting voltage value can be previously set by technical staff it is also possible to
It is that poe system sets according to current system running status, the embodiment of the present invention does not specifically limit
Fixed.Preferably, this detecting voltage is 15.5v～20.5v.
3062nd, pd passes through to absorb constant current (graded features signal) from line to pse
Show oneself required peak power；
In embodiments of the present invention, pse and pd can prespecified detection maximum work needed for pd
The strategy of rate, when pse is to pd output detecting voltage, pd absorbs from line and can identify its institute
Need the constant current of peak power, feed back its power level to pse.For example, pd inhales on line
Receive the electric current of 10ma, identifying peak power needed for this pd is 15.4w, and pd absorbs on line
The electric current of 20ma, identifying peak power needed for this pd is 30w.
It is understood that for the accuracy ensureing peak power needed for detected pd,
Pse can be repeatedly to the detecting voltage that pd output is identical or different, and repeated detection pd is from line
The magnitude of current absorbing, reliably assesses the maximum needed for pd by built-in Mean Filtering Algorithm
Operating power.
3063rd, pse receives the loop current that pd feeds back, negative to further confirm that pd
Load belongs to which class is powered rank
It is understood that pse electric current has to be limited to smaller current used in detection process
Amount, to avoid damaging pd, and the Connection Time also will limit within a short period of time, with to pd
Power consumption is controlled by.
It should be noted that step 305 is to obtain the power limit of pd access interface, and walk
Rapid 306 is to obtain maximum power value needed for pd, is to enter according to sequencing in the embodiment of the present invention
Row, that is to say the power limit first obtaining pd access interface, then obtain maximum needed for pd
Performance number.It is true that in another embodiment of the invention, can be first to obtain needed for pd
Maximum power value, then obtain the power limit of pd access interface；Pd can also be obtained simultaneously
The power limit of access interface and maximum power value needed for acquisition pd, the embodiment of the present invention is not
It is specifically limited.
307th, judge that the power limit of this pd access interface is not less than peak power needed for this pd
Value；
When result of determination is to be, execution step 308；Otherwise, execution step 303；
In embodiments of the present invention, before power supply formal to this pd, detection pd first accesses
The size of the power limit of port and maximum power value needed for pd, when detecting pd incoming end
Mouthful power limit be not less than needed for this pd during maximum power value it is believed that this pd can be supplied
Electricity, when power limit pd access interface is detected is less than maximum power value needed for this pd,
This pd is not powered, it is to avoid cause pd to transship, or the pse wasting of resources.
For example, power supply general power is 80w, and pse powers to a port 30w, and c port is powered
30w, already consumed by 60w power consumption, power supply residue power consumption is 20w, in order to make full use of electricity
Remaining resource 20w in source, and be not intended in the equipment powered by lower electricity, b port is set
Power limit be 20w.Now, the pd being 30w if there are required peak power accesses b
Port is then it is assumed that the power limit of this pd access interface is less than maximum power value needed for this pd.
308th, judge that whether power supply surpluses power required maximum power value not less than this pd；
When result of determination is to be, execution step 312；Otherwise, execution step 309；
For example, power supply general power is 80w, and pse powers to a port 30w, and c port is powered
30w, already consumed by 60w power consumption, power supply residue power consumption is 20w, now, if
The pd that peak power is 30w is needed to access b port then it is assumed that power supply surpluses are less than this pd confession
Maximum power value needed for electricity.
309th, judge that current supply port whether there is target port；This target port preferential
Level is less than the priority of this pd access interface；
When result of determination is to be, execution step 310；Otherwise, execution step 303；
It is understood that the quantity of this target port be probably zero it may be possible to one,
Possibly multiple.
In embodiments of the present invention, when judging that current supply port does not have target port,
It is the priority that current supply port is above this pd access interface, now, stop to this
Pd powers.For example, power supply general power is 80w, and a port power limits value is 30w, preferentially
Level is critical；B port power limits value is 30w, and priority is high, c port power
Limits value is 30w, and priority is low.Current pse powers to a port 30w, to b port
Power supply 30w, already consumed by 60w power consumption, power supply residue power consumption is 20w, now, if
The pd that required peak power is 30w is had to access c port, due to a port and the b of current power supply
The priority of port is above the priority of c port it is impossible to power to c port.
In embodiments of the present invention, in the case of pse supplying power for outside deficiency, preferentially to preferential
The high port of level powers, and the pd of the high port hanger of priority can unconditional seize low excellent
The supply port of first level is it is ensured that key equipment can preferentially be powered.For example, power supply general power is
80w, a port power limits value is 30w, and priority is critical；B port power limits
It is worth for 30w, priority is high, c port power limits value is 30w, priority is low.
Current pse powers to a port 30w, and power 30w to c port, already consumed by 60w power consumption,
Power supply residue power consumption is 20w, and now, the pd being 30w if there are required peak power accesses b
Port, because the priority of b port is higher than c port priority, then needs to cut off the confession of c port
Electricity, is powered to b port.
Alternatively, when the output power of pse is not enough, if different port priority is identical,
Carry out prioritization according to port numbers, the little Port Priority of port numbers obtains power supply and ensures.Example
As power supply general power is 80w, and a port power limits value is 30w, and priority is critical；
B port power limits value is 30w, and priority is low, and c port power limits value is 30w,
Priority is low.Current pse powers to a port 30w, and power 30w to c port,
Consume 60w power consumption, power supply residue power consumption is 20w, now, if there are required peak power
Pd for 30w accesses b port, because a port priority is higher than b port and c port, and b
Port priority is identical with c port priority, now needs to carry out priority row according to port numbers
Sequence, because the port numbers of b port are less than the port numbers of c port, can preferentially be powered,
Then cut-out c port powers, and b port is powered.
310th, cut off this target port to power；
311st, judge that whether current power surpluses power required peak power not less than this pd
Value；
When result of determination is to be, execution step 312；Otherwise execution step 309；
When this pd power required peak power larger when, cut off current supply port medium priority
After minimum port powers, dump energy still can not meet this pd and power required peak power
Value, needs continuation to cut off the minimum port of current supply port medium priority and powers, until current
Whether power supply surpluses power required maximum power value not less than this pd.
312nd, this pd is powered；
313rd, whether abnormal monitor power supply after this pd powers；
When monitoring result is to be, execution step 303；Otherwise, execution step 301.
In embodiments of the present invention, after pse starts power supply, supervision port can be periodically flushed
Power supply state, and report the states such as the overload of pd, excessively stream, overvoltage, underpower in time
Information.
Method provided in an embodiment of the present invention, if pse detects pd and connects, detection first should
Whether the power limit of pd access interface is not less than maximum power value needed for this pd, if inspection
It is no for surveying result, stops power supply, can avoid field technician's maloperation, will be greater than power
The situation that when equipment of limits value accesses it may appear that this port can not power；If testing result
It is yes, then continues power supply, whether detection power supply surpluses meet this pd and power further, when
Pse power supply surpluses can not meet this pd when powering, according to priority order cut-out from low to high
The power supply of current supply port, until power supply surpluses disclosure satisfy that pd powers, has reached
In the case of pse supplying power for outside deficiency, the expectation that preferentially port high to priority powers.
Fig. 4 shows and provided in an embodiment of the present invention a kind of supplies Denso based on the pse of poe system
The structural representation put, as shown in figure 4, this device includes:
Power Limitation detection module 41, for when pse detects pd and connects, obtaining described pd
The power limit of access interface；
Wherein, this pse is the power supply unit of poe electric power system, is primarily used to set to other
The standby equipment being powered；This pd is the power receiving equipment in poe electric power system, such as ip phone,
Wireless ap (access point, WAP), portable computer, portable equipment charge
The centralized power of the terminals such as device, the POS, photographic head, data acquisition is powered.
It should be noted that after above-mentioned pse detects pd connection, obtaining described pd incoming end
Before the power limit of mouth, pse can detect whether pd is standard pd, when pd is non-standard
During pd, stop this pd is powered, it is to avoid non-standard pd is damaged.Institute in the present embodiment
Standard pd of meaning refers to that meeting ieee802.3 standard defines the feature that pd exists: a. DC impedance
Between 19k～26.5kohm；B. capacitance is less than 150nf.If the feature capacitance-resistance detecting
Do not meet the value of above standard definition, that is, think that opposite equip. is non-standard pd, do not supplied
Electricity.If the feature capacitance-resistance detecting meets the value of above standard definition, power supply will be continued.
Required peak power detection module 42, for by exporting detecting voltage inspection to described pd
Survey maximum power value needed for described pd；
For the ease of poe system, power supply is managed, pse needs to judge the electricity consumption of this pd
Amount.In embodiments of the present invention, pse detects the power of pd equipment using a detecting voltage
Rank, limits and power-on time mechanism according to internal current, to shake hands step by step to pd load
Consult.
Wherein, the detecting voltage value that this pse exports to pd, can for one value or
One scope, the setting of this detecting voltage value can be previously set by technical staff it is also possible to
It is that poe system sets according to current system running status, the embodiment of the present invention does not specifically limit
Fixed.
It is understood that for the accuracy ensureing peak power needed for detected pd,
Pse can be repeatedly to the detecting voltage that pd output is identical or different, and repeated detection pd is from line
The magnitude of current absorbing, reliably assesses the maximum needed for pd by built-in Mean Filtering Algorithm
Operating power.
Power supply surpluses detection module 43, for when the power limit of described pd access interface
Not less than needed for described pd, during maximum power value, whether detection power supply surpluses are not less than described
Pd powers required maximum power value；
In embodiments of the present invention, before power supply formal to this pd, detection pd first accesses
The size of the power limit of port and maximum power value needed for pd, when detecting pd incoming end
Mouthful power limit be not less than needed for this pd during maximum power value it is believed that this pd can be supplied
Electricity, when power limit pd access interface is detected is less than maximum power value needed for this pd,
This pd is not powered, it is to avoid cause pd to transship, or the pse wasting of resources.
Preferential supply module 44, for when testing result for no when, according to priority from low to high
Order cuts off the power supply of current supply port, until power supply surpluses are powered not less than described pd
Required maximum power value, and then described pd is powered.
In embodiments of the present invention, in the case of pse supplying power for outside deficiency, preferentially to preferential
The high port of level powers, and the pd of the high port hanger of priority can unconditional seize low excellent
The supply port of first level is it is ensured that key equipment can preferentially be powered.When pse output power not
When sufficient, if different port priority is identical, carry out prioritization according to port numbers, end
The little Port Priority of slogan obtains power supply and ensures.
Accordingly, said apparatus are also included not shown in Fig. 4: power supply cut-out module；
Power supply cut-out module, specifically for detecting whether described pd is standard pd；When detection knot
When fruit is to be, continue described pd is powered；Otherwise, described pd is stopped power supply.
Power supply cut-out module, is additionally operable to be less than institute when the power limit of described pd access interface
When stating maximum power value needed for pd, stop described pd is powered.
In one preferred embodiment, described preferential supply module 44, is additionally operable to from current
Identify at least one target port in supply port, at least one target port described preferential
Level is less than the priority of described pd access interface；According to priority order from low to high, disconnects
The minimum target port of at least one target port medium priority described is powered；Judge current power
Whether surpluses power required maximum power value not less than described pd；When result of determination is to be,
Described pd is powered；Otherwise, continue the cut-out low target port of priority time to power,
Until power supply surpluses are powered required maximum power value not less than described pd, and then to described pd
It is powered.
Accordingly, said apparatus are also included not shown in Fig. 4: monitoring modular；
Monitoring modular, whether abnormal for monitoring power supply after described pd powers；Work as monitoring result
During for being, disconnecting described pd and powering；Otherwise, continue power supply.
Device provided in an embodiment of the present invention, if pse detects pd and connects, detection first should
Whether the power limit of pd access interface is not less than maximum power value needed for this pd, if inspection
It is no for surveying result, stops power supply, can avoid field technician's maloperation, will be greater than power
The situation that when equipment of limits value accesses it may appear that this port can not power；If testing result
It is yes, then continues power supply, whether detection power supply surpluses meet this pd and power further, when
Pse power supply surpluses can not meet this pd when powering, according to priority order cut-out from low to high
The power supply of current supply port, until power supply surpluses disclosure satisfy that pd powers, has reached
In the case of pse supplying power for outside deficiency, the expectation that preferentially port high to priority powers.
It will be appreciated that the above-mentioned pse electric supply installation based on poe system with above-mentioned based on poe
The pse method of supplying power to of system is one-to-one, and the present embodiment no longer enters to above-mentioned electric supply installation
Row describes in detail.
Those skilled in the art are it should be appreciated that embodiments herein can be provided as method, be
System or computer program.Therefore, the application can be using complete hardware embodiment, completely
Software implementation or the form of the embodiment with reference to software and hardware aspect.And, the application
Can use using in one or more computers wherein including computer usable program code
On storage medium (including but not limited to disk memory, cd-rom, optical memory etc.)
The form of the computer program implemented.
The application is with reference to according to the method for the embodiment of the present application, equipment (system) with calculate
The flow chart of machine program product and/or block diagram are describing.It should be understood that can be by computer program
Each flow process in instruction flowchart and/or block diagram and/or square frame and flow chart
And/or the combination of the flow process in block diagram and/or square frame.These computer programs can be provided to refer to
General purpose computer, special-purpose computer, Embedded Processor or other programmable datas is made to process
The processor of equipment is to produce a machine so that passing through at computer or other programmable datas
The instruction of the computing device of reason equipment produces for realizing in one flow process or multiple of flow chart
The device of the function of specifying in flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions may be alternatively stored in and can guide computer or other programmable numbers
According in the computer-readable memory that processing equipment works in a specific way so that being stored in this meter
Instruction in calculation machine readable memory produces the manufacture including command device, and this command device is real
One flow process of flow chart or multiple flow process and/or one square frame of block diagram or multiple square frame now
In the function specified.
These computer program instructions also can be loaded into computer or other programmable datas are processed
So that execution series of operation steps is to produce on computer or other programmable devices on equipment
Raw computer implemented process, thus the instruction executing on computer or other programmable devices
There is provided for realizing in one flow process of flow chart or multiple flow process and/or one square frame of block diagram
Or the step of the function of specifying in multiple square frame.
Although having been described for the preferred embodiment of the application, those skilled in the art are once
Know basic creative concept, then these embodiments can be made with other change and modification.
So, claims are intended to be construed to including preferred embodiment and fall into the application scope
Had altered and changed.
Obviously, those skilled in the art the application can be carried out various change and modification and not
Depart from spirit and scope.So, if these modifications of the application and modification belong to
Within the scope of the application claim and its equivalent technologies, then the application is also intended to comprise these
Including change and modification.
Claims (10)
1. a kind of pse method of supplying power to based on poe system is it is characterised in that methods described bag
Include:
When pse power supply unit detects pd power receiving equipment and connects, obtain described pd incoming end
The power limit of mouth；
Pse passes through to export maximum power value needed for the detecting voltage described pd of detection to described pd；
When the power limit of described pd access interface is not less than maximum power value needed for described pd
When, whether detection power supply surpluses power required maximum power value not less than described pd；
When testing result for no when, according to priority order from low to high cuts off current supply port
Power supply, until power supply surpluses are powered required maximum power value not less than described pd, and then
Described pd is powered.
2. method according to claim 1 is it is characterised in that pse detects pd connection
Afterwards, methods described also includes:
Pse detects whether described pd is standard pd；When the test results is yes, continue to institute
State pd to power；Otherwise, described pd is stopped power supply.
3. method according to claim 1 is it is characterised in that methods described also includes:
When the power limit of described pd access interface is less than maximum power value needed for described pd
When, stop described pd is powered.
4. method according to claim 1 is it is characterised in that according to priority from low to high
Order cut off the power supply of current supply port, until power supply surpluses are not less than described pd and supply
Electricity needed for maximum power value, and then described pd is powered including:
At least one target port, at least one target described is identified from current supply port
The priority of port is less than the priority of described pd access interface；
According to priority order from low to high, disconnects at least one target port medium priority described
Minimum target port is powered；
Judge that whether current power surpluses power required maximum power value not less than described pd；
When result of determination is to be, described pd is powered；Otherwise, continue cut-out priority time
Low target port is powered, until power supply surpluses are powered required maximum work not less than described pd
Rate value, and then described pd is powered.
5. method according to claim 1 is it is characterised in that according to priority from low to high
Order cut off current supply port power supply until power supply surpluses power not less than described pd
Required maximum power value, and then after described pd is powered, methods described also includes:
Whether abnormal monitor power supply after described pd powers；When monitoring result is to be, disconnect institute
State pd to power；Otherwise, continue power supply.
6. a kind of pse electric supply installation based on poe system is it is characterised in that described device bag
Include:
Power Limitation detection module, for when pse detects pd and connects, obtaining described pd
The power limit of access interface；
Required peak power detection module, for by exporting detecting voltage detection to described pd
Maximum power value needed for described pd；
Power supply surpluses detection module, for the power limit when described pd access interface not
Less than needed for described pd, during maximum power value, whether detection power supply surpluses are not less than described pd
Maximum power value needed for power supply；
Preferential supply module, for when testing result for no when, according to priority from low to high suitable
Sequence cuts off the power supply of current supply port, until power supply surpluses are not less than described pd power supply station
Need maximum power value, and then described pd is powered.
7. device according to claim 6 is it is characterised in that described device also includes:
Power supply cut-out module, for detecting whether described pd is standard pd；When testing result is
When being, continue described pd is powered；Otherwise, described pd is stopped power supply.
8. device according to claim 7 it is characterised in that described power supply cut-out module,
It is additionally operable to be less than maximum power value needed for described pd when the power limit of described pd access interface
When, stop described pd is powered.
9. device according to claim 6 is it is characterised in that preferential supply module is also used
In identifying at least one target port, at least one destination end described from current supply port
The priority of mouth is less than the priority of described pd access interface；According to priority from low to high suitable
Sequence, disconnects the described minimum target port of at least one target port medium priority and powers；Judge
Whether current power surpluses power required maximum power value not less than described pd；When judgement knot
When fruit is to be, described pd is powered；Otherwise, continue the low target of cut-out priority time
Port powers, until power supply surpluses are powered required maximum power value not less than described pd, enters
And described pd is powered.
10. device according to claim 6 is it is characterised in that described device also includes:
Monitoring modular, whether abnormal for monitoring power supply after described pd powers；Work as monitoring result
During for being, disconnecting described pd and powering；Otherwise, continue power supply.
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| CN201510392015.1A CN106341237B (en) | 2015-07-06 | 2015-07-06 | PSE method of supplying power to and device based on POE system |
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|---|---|---|---|
| CN201510392015.1A CN106341237B (en) | 2015-07-06 | 2015-07-06 | PSE method of supplying power to and device based on POE system |
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| CN107612854A (en) * | 2017-10-18 | 2018-01-19 | 湖南恒茂高科股份有限公司 | A kind of non-management type PoE interchangers and control method |
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| CN110941224A (en) * | 2019-12-25 | 2020-03-31 | 北京东方微视科技有限公司 | Distributed POE equipment power acquisition and intelligent management system |
| CN112003710A (en) * | 2020-08-24 | 2020-11-27 | 世邦通信股份有限公司 | System and method for improving stability of POE receiving end |
| CN112003710B (en) * | 2020-08-24 | 2022-07-08 | 世邦通信股份有限公司 | System and method for improving stability of POE receiving end |
| CN114143120A (en) * | 2020-09-03 | 2022-03-04 | 瑞昱半导体股份有限公司 | Ethernet power supply device and power management method thereof |
| TWI779354B (en) * | 2020-09-03 | 2022-10-01 | 瑞昱半導體股份有限公司 | Ethernet power sourcing equipment |
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