CN102664741A - Method and device of power over Ethernet - Google Patents
Method and device of power over Ethernet Download PDFInfo
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- CN102664741A CN102664741A CN2012101062839A CN201210106283A CN102664741A CN 102664741 A CN102664741 A CN 102664741A CN 2012101062839 A CN2012101062839 A CN 2012101062839A CN 201210106283 A CN201210106283 A CN 201210106283A CN 102664741 A CN102664741 A CN 102664741A
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Abstract
The invention relates to the Ethernet technology and discloses a method and a device of power over Ethernet. A PD (powered device) is used to input power through a POE (power over Ethernet) port. Electricity is obtained from external PSE (power sourcing equipment). The obtained electricity is supplied to a terminal device and at least one second PSE. The PD of the POE port is connected with the second PSE and the second PSE supplies power to the PD. By means of cascade PSE, one single external PSE can not only supply power to the PD which is connected with the PSE through the POE port but supply power to one or multiple sequential cascade PDs, so that power supply efficiency of the PSE is enhanced effectively. The second PSE can obtain electricity from the POE port directly so that efficiency of energy conversion is further enhanced.
Description
Technical field
The present invention relates to ethernet technology, particularly based on the power supply technique of Ethernet.
Background technology
POE (Power Over Ethernet; Be called for short " POE ") refer under the situation that existing Ethernet Cat.5 wiring architecture does not make any changes; When being some IP-based terminals (like IP phone machine, wireless local network connecting point AP, web camera etc.) transmission of data signals, kind equipment provides the technology of direct current supply for this reason.POE also is called as the electric power system (POL based on local area network (LAN); Power over LAN) or active Ethernet (Active Ethernet); This is to transmit the newest standards standard of data and electrical power when utilizing existing standard ethernet transmission cable, and has kept the compatibility with existing Ethernet system and user.
A complete POE system comprises feeder ear equipment (Power Sourcing Equipment is called for short " PSE ") and receiving end equipment (Powered Device is called for short " PD ") two parts.PSE equipment is the equipment for the ethernet client power devices, also is the manager of whole POE process simultaneously.And PD equipment is the PSE load of accepting power supply, i.e. the client device of POE system.In fact, any power equipment of being no more than 13W can obtain corresponding electric power from the RJ45 socket as PD.
Concrete supply power mode in the POE system is: whether PSE detects with this PSE is PD through the power receiving equipment that the POE network interface is connected, if PD then exports electric energy and gives this PD, if not PD, does not then export electric energy and gives power receiving equipment.Can find through this supply power mode if a PSE connects a plurality of power receiving equipments, whether what this PSE can't discern connection is PD, therefore also just can't supply power.That is to say that in existing P OE system, a PSE can only be a PD power supply.
Summary of the invention
The object of the present invention is to provide a kind of POE method and device thereof, make a PSE to supply power, thereby promoted the power supply efficiency of PSE for a plurality of PD, and, need not to change existing P OE technical standard, help applying.
For solving the problems of the technologies described above, execution mode of the present invention provides a kind of POE method, comprises following steps:
Receiving end equipment obtains electric current through POE POE input network interface from the first feeder ear equipment;
The said electric current that gets access to is exported to terminal equipment and at least one second feeder ear equipment;
The said second feeder ear equipment is next stage receiving end power devices, and this next stage receiving end equipment is the receiving end equipment that links to each other through POE output network interface with this feeder ear equipment.
Execution mode of the present invention also provides a kind of POE device, comprises: POE POE input network interface, receiving end equipment, terminal equipment, power-switching circuit, at least one second feeder ear equipment, with said second feeder ear equipment POE output one to one network interface;
Wherein, the input of said receiving end equipment links to each other with said POE input network interface, imports network interface through this POE, obtains electric current from the first feeder ear equipment of outside;
The output of said receiving end equipment links to each other with said terminal equipment; Be used for to said terminal equipment output current; And; The output of this receiving end equipment links to each other with said power-switching circuit, supplies this power-switching circuit to convert the output voltage of said receiving end equipment into the said second feeder ear equipment required input voltage;
The output of said power-switching circuit connects the input of the said second feeder ear equipment, is used for the output voltage of said receiving end equipment is being offered the said second feeder ear equipment after voltage transitions;
The output of the said second feeder ear equipment links to each other with corresponding POE output network interface, and this second feeder ear equipment is the next stage receiving end power devices that links to each other with this POE output network interface through corresponding POE output network interface.
Execution mode of the present invention also provides a kind of POE device, comprises: POE POE input network interface, receiving end equipment, terminal equipment, solid-state switch, at least one second feeder ear equipment, with said second feeder ear equipment POE output one to one network interface;
Wherein, the input of said receiving end equipment links to each other with said POE input network interface, imports network interface through this POE, obtains electric current from the first feeder ear equipment of outside;
The output of said receiving end equipment links to each other with said terminal equipment, is used for to said terminal equipment output current, and; The output of this receiving end equipment is connected to the control end of said solid-state switch, and be used to control solid-state switch and be in closure state, and; When the output of this receiving end equipment outputs current to the control end of said solid-state switch, said solid-state switch gets into closure state, or claims conducting state; Otherwise said solid-state switch gets into non-closure state, or claims nonconducting state;
One end of said solid-state switch links to each other with said POE input network interface; The other end links to each other with the said second feeder ear equipment; When said solid-state switch was in closure state, the circuit of the said POE input of conducting network interface to the said second feeder ear equipment was for the said second feeder ear equipment provides electric current;
The output of the said second feeder ear equipment links to each other with corresponding POE output network interface, and this second feeder ear equipment is the next stage receiving end power devices that links to each other with this POE output network interface through corresponding POE output network interface.
Embodiment of the present invention in terms of existing technologies; Utilize PD to pass through POE input network interface, obtain electric current from the PSE of outside, with the electric current that gets access to except offering terminal equipment; Also offer at least one the 2nd PSE, supply power for the PD that links to each other with POE input network interface by the 2nd PSE.Through the mode of cascade PSE, make the PSE of single outside, not only can be the PD power supply that links to each other through the POE network interface; Can also be one or more PD power supplies of subsequent cascaded, effectively promote the power supply efficiency of PSE, and; Need not to change existing P OE technical standard, help applying.
The said electric current that will get access in the following manner in addition, is exported to terminal equipment and at least one second feeder ear equipment:
Obtain the PD of electric current from POE input network interface, to the terminal equipment output current, and this PD converts the output voltage of this PD into the 2nd PSE required input voltage through power-switching circuit, is that the 2nd PSE provides electric current.Because the output voltage of PD is different from the input voltage of PSE, therefore the output voltage with PD is offering the 2nd PSE again after voltage transitions, has guaranteed that the 2nd PSE is the normal power supply of follow-up PD.
In addition, also can in the following manner the said electric current that gets access to be exported to terminal equipment and at least one second feeder ear equipment:
Import the PD that network interface obtains electric current from said POE, to said terminal equipment output current, and this PD is in closure state through controlling solid-state switch SW simultaneously, and the direct-connected circuit to the 2nd PSE of conducting POE input network interface is that the 2nd PSE provides electric current.Through the control of PD to solid-state switch; The 2nd PSE can directly obtain electric current from POE input network interface; And need not from the output of PD to obtain electric current via power-switching circuit; Can avoid electric energy that outside PSE provides energy consumption, thereby promote energy conversion efficiency greatly because of producing through inner PD and PSE.And, avoided resting on a large amount of heats that produce in the equipment because of the electric energy of institute's loss, and then the problem that directly causes equipment heating to damage.
In addition, when the 2nd PSE had 2 at least, the input of each the 2nd PSE was parallel to an end of solid-state switch, and the other end of this solid-state switch links to each other with POE input network interface, can realize the cascade of a plurality of PSE, PD, has further promoted the power supply efficiency of PSE.
Description of drawings
Fig. 1 is the POE method flow diagram according to first embodiment of the invention;
Fig. 2 is according to POE device sketch map involved in the first embodiment of the invention;
Fig. 3 is according to POE device sketch map involved in the second embodiment of the invention;
Fig. 4 is the sketch map that connects a plurality of PSE1 according to extending in the second embodiment of the invention.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that each execution mode of the present invention is carried out detailed elaboration below.Yet, persons of ordinary skill in the art may appreciate that in each execution mode of the present invention, in order to make the reader understand the application better many ins and outs have been proposed.But,, also can realize each claim of the application technical scheme required for protection even without these ins and outs with based on the many variations and the modification of following each execution mode.
First execution mode of the present invention relates to a kind of POE method, and idiographic flow is as shown in Figure 1.
In step 101, PD obtains electric current through POE input network interface from a PSE.Specifically, as shown in Figure 2, an outside PSE (being the PSE0 among Fig. 2) is connected to the POE input network interface of POE device through the CAT5/6 netting twine, this POE input network interface directly with POE equipment in a PD (being the PD1 among Fig. 2) link to each other.Owing to, be PD in case PSE0 detects power receiving equipment according to existing P OE standard, then will export electric energy and give this PD, therefore, in this step, PD capable of using obtains electric current through POE input network interface from the first feeder ear equipment.
Then, in step 102, the electric current that gets access to is exported to terminal equipment and at least one the 2nd PSE.Specifically, terminal equipment can be the terminal equipment of any type, like IP phone machine, wireless local network connecting point AP, web camera, palmtop PC, charger for mobile phone etc., in this execution mode, is that AP is that example describes with the terminal equipment.
In this step, to the AP output current, this AP can produce WiFi WLAN mouth by PD1, and this PD1 converts the output voltage of this PD into the 2nd PSE (being the PSE1 among Fig. 2) required input voltage through power-switching circuit, for this PSE1 provides electric current.The output voltage of PD1 is U1 in this execution mode, and like 3.3V, 5V or 12V etc., the input voltage of PSE1 is 48V.It will be appreciated by those skilled in the art that; In the POE device as shown in Figure 2, have only one the 2nd PSE (being PSE1) and power-switching circuit, but in practical application; This power-switching circuit can the parallel connection a plurality of the 2nd PSE; The input voltage of this power-switching circuit is U1, and output voltage is 48V, for a plurality of the 2nd PSE provide required voltage.
Then, in step 103, the 2nd PSE is next stage PD power supply, and this next stage PD is the PD that links to each other through POE output network interface with this PSE.Specifically, the 2nd PSE (being PSE1) links to each other with the POE output network interface of POE device, and this POE output network interface is used for connecting outside PD (like the PD2 of Fig. 2) through the CAT5/6 netting twine.Because that in a single day PSE1 detects this POE output network interface connection is PD, then this PSE1 is about to this PD2 output electric energy.
In this execution mode, through in the POE device, the mode of at least one PSE of cascade; Making the PSE of single outside, not only can be the PD power supply that links to each other through the POE network interface, can also be one or more PD power supplies of subsequent cascaded; Effectively promoted the power supply efficiency of PSE; And, need not to change existing P OE technical standard, help applying.
POE device related in this execution mode is as shown in Figure 2, comprises: POE input network interface, PD, terminal equipment, power-switching circuit, at least one the 2nd PSE, with the 2nd PSE POE output one to one network interface.
Wherein, the input of PD and POE input network interface links to each other, imports network interface through this POE, obtains electric current from a PSE of outside; The output of PD links to each other with terminal equipment, be used for to the terminal equipment output current, and the output of this PD links to each other with power-switching circuit, supplies this power-switching circuit to convert the output voltage of this PD into the 2nd PSE required input voltage.
The output of power-switching circuit connects the input of the 2nd PSE, is used for the output voltage of PD is being offered the 2nd PSE after voltage transitions.The output of the 2nd PSE links to each other with corresponding POE output network interface, and the 2nd PSE is the next stage PD power supply that links to each other with this POE output network interface through corresponding POE output network interface.
Second execution mode of the present invention relates to a kind of POE method.Second execution mode improves on the basis of first execution mode, and main improvements are: in second embodiment of the invention, will export to terminal equipment and at least one the 2nd PSE from the electric current that outside PSE gets access in the following manner:
Import the PD that network interface obtains electric current from POE, to the terminal equipment output current, and this PD controls solid-state switch SW simultaneously and is in closure state and conducting, for the 2nd direct-connected PSE of this receiving end equipment electric current being provided.
Specifically; The POE device that relates in this execution mode is as shown in Figure 3, comprises: with POE input network interface, PD (being the PD1 among Fig. 3), terminal equipment, solid-state switch, at least one the 2nd PSE (being the PSE1 among Fig. 3), with the 2nd PSE POE output one to one network interface.
Wherein, the input of PD1 and POE input network interface links to each other, imports network interface through this POE, obtains electric current from the PSE (being the PSE0 Fig. 3) of outside; The output of PD1 links to each other with terminal equipment (being the AP among Fig. 3), be used for to the terminal equipment output current, and the output of this PD1 is connected to the control end of solid-state switch (being the SW among Fig. 3), is used to control solid-state switch and is in closure state.One end of this solid-state switch links to each other with POE input network interface, and the other end links to each other with PSE1, and when solid-state switch was in closure state, conducting POE input network interface was to the circuit of PSE1, for PSE1 provides electric current.
The output of PSE1 links to each other with corresponding POE output network interface, and this PSE1 is next stage receiving end equipment (being the PD2 among Fig. 3) power supply that links to each other with this POE output network interface through corresponding POE output network interface.
The operation principle of POE device as shown in Figure 3 is following:
PSE0 supplies power to PD1 when detecting power receiving equipment and be PD.If the output voltage of PD1 is normal, then to AP power supply, and control SW is in closure state, otherwise control SW is in off-state.Because SW is when being in closure state, POE input network interface to the circuit of PSE1 will be in conducting, and this moment, PSE0 also was the PD1 power supply, can directly be that PSE1 supplies power through POE input network interface to the circuit of PSE1 therefore.PSE1 supplies power to PD2 when detecting the equipment that links to each other with corresponding POE output network interface and be PD.
That is to say that in this execution mode, through utilizing a solid-state switch SW, import the input of the power supply of PD1 through the power supply that switch is directly connected to PSE1, when control end C no-voltage, solid-state switch SW is in opening, input A and output B break off; When control end C applies voltage (the normal output voltage of PD1), solid-state switch SW is in closure state, input A and output B conducting, and the electric current of importing from POE input network interface is applied directly to PSE1, starts PSE1 and is in normal operating conditions.Because PD1 only gives the power supply of AP and control switch control end, consumed power significantly is reduced to about 3W, so efficient reaches more than 90%.And directly by the 48V power supply, its power loss is equivalent to a switching tube to PSE1, and efficient is high; Maximum loss has only about 0.75W.This shows, directly obtain electric current, can avoid electric energy that outside PSE provides energy consumption, thereby promote energy conversion efficiency greatly because of producing through inner PD and PSE from POE input network interface through the 2nd PSE (PSE1).And, avoided resting on a large amount of heats that produce in the equipment because of the electric energy of institute's loss, and then the problem that directly causes equipment heating to damage.
In addition, it will be understood by those skilled in the art that the method for this execution mode can extend to a plurality of PSE1 of connection, as shown in Figure 4, when the 2nd PSE had 2 at least, the input of each the 2nd PSE was parallel to this solid-state switch.Thereby realize the cascade of a plurality of PSE, PD, further promoted the power supply efficiency of PSE.
Persons of ordinary skill in the art may appreciate that above-mentioned each execution mode is to realize specific embodiment of the present invention, and in practical application, can be in form with on the details it is done various changes, and without departing from the spirit and scope of the present invention.
Claims (10)
1. a POE method is characterized in that, comprises following steps:
Receiving end equipment obtains electric current through POE POE input network interface from the first feeder ear equipment;
The said electric current that gets access to is exported to terminal equipment and at least one second feeder ear equipment;
The said second feeder ear equipment is next stage receiving end power devices, and this next stage receiving end equipment is the receiving end equipment that links to each other through POE output network interface with this feeder ear equipment.
2. POE method according to claim 1 is characterized in that, the said electric current that gets access to is exported in the step of terminal equipment and at least one the second feeder ear equipment, comprises following substep:
Obtain the receiving end equipment of electric current from said POE input network interface; To said terminal equipment output current; And; This receiving end equipment converts the output voltage of this receiving end equipment into the said second feeder ear equipment required input voltage through power-switching circuit, for the said second feeder ear equipment provides electric current.
3. POE method according to claim 2 is characterized in that,
The output voltage of said receiving end equipment is U1, and the input voltage of the said second feeder ear equipment is 48V;
Wherein, said U1 is 3.3V, 5V or 12V.
4. POE method according to claim 1 is characterized in that, the said electric current that gets access to is exported in the step of terminal equipment and at least one the second feeder ear equipment, comprises following substep:
Obtain the receiving end equipment of electric current from said POE input network interface; To said terminal equipment output current; And this receiving end equipment is controlled solid-state switch simultaneously and is in closure state and conducting, for the direct-connected said second feeder ear equipment of this receiving end equipment electric current being provided.
5. POE method according to claim 4; It is characterized in that; When the said second feeder ear equipment had 2 at least, the input of each said second feeder ear equipment was parallel to an end of said solid-state switch, and the other end of this solid-state switch links to each other with the input of said receiving end equipment.
6. according to each described POE method in the claim 1 to 5, it is characterized in that said terminal equipment comprises the terminal equipment of following any type:
IP phone machine, wireless local network connecting point AP, web camera, palmtop PC, charger for mobile phone.
7. POE device; It is characterized in that, comprise: POE POE input network interface, receiving end equipment, terminal equipment, power-switching circuit, at least one second feeder ear equipment, with said second feeder ear equipment POE output one to one network interface;
Wherein, the input of said receiving end equipment links to each other with said POE input network interface, imports network interface through this POE, obtains electric current from the first feeder ear equipment of outside;
The output of said receiving end equipment links to each other with said terminal equipment; Be used for to said terminal equipment output current; And; The output of this receiving end equipment links to each other with said power-switching circuit, supplies this power-switching circuit to convert the output voltage of said receiving end equipment into the said second feeder ear equipment required input voltage;
The output of said power-switching circuit connects the input of the said second feeder ear equipment, is used for the output voltage of said receiving end equipment is being offered the said second feeder ear equipment after voltage transitions;
The output of the said second feeder ear equipment links to each other with corresponding POE output network interface, and this second feeder ear equipment is the next stage receiving end power devices that links to each other with this POE output network interface through corresponding POE output network interface.
8. POE device according to claim 7 is characterized in that,
The output voltage of said receiving end equipment is U1, and the input voltage of the said second feeder ear equipment is 48V;
Wherein, said U1 is 3.3V, 5V or 12V.
9. POE device; It is characterized in that, comprise: POE POE input network interface, receiving end equipment, terminal equipment, solid-state switch, at least one second feeder ear equipment, with said second feeder ear equipment POE output one to one network interface;
Wherein, the input of said receiving end equipment links to each other with said POE input network interface, imports network interface through this POE, obtains electric current from the first feeder ear equipment of outside;
The output of said receiving end equipment links to each other with said terminal equipment, be used for to said terminal equipment output current, and the output of this receiving end equipment is connected to the control end of said solid-state switch, is used to control solid-state switch and is in closure state;
One end of said solid-state switch links to each other with said POE input network interface; The other end links to each other with the said second feeder ear equipment; When said solid-state switch was in closure state, the circuit of the said POE input of conducting network interface to the said second feeder ear equipment was for the said second feeder ear equipment provides electric current;
The output of the said second feeder ear equipment links to each other with corresponding POE output network interface, and this second feeder ear equipment is the next stage receiving end power devices that links to each other with this POE output network interface through corresponding POE output network interface.
10. POE device according to claim 9 is characterized in that, when comprising at least 2 said second feeder ear equipment in the said POE device, the input of each said second feeder ear equipment is parallel to said solid-state switch.
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| CN107979474A (en) * | 2016-10-21 | 2018-05-01 | 华为技术有限公司 | The network equipment and method of supplying power to |
| CN107979474B (en) * | 2016-10-21 | 2020-06-26 | 华为技术有限公司 | Network device and power supply method |
| US11329837B2 (en) | 2016-10-21 | 2022-05-10 | Huawei Technologies Co., Ltd. | Network device and power supply method |
| CN110032261A (en) * | 2018-01-12 | 2019-07-19 | 克洛纳测量技术有限公司 | With the electric equipment through functional device that is ensuring and not ensuring |
| CN110658408A (en) * | 2019-10-14 | 2020-01-07 | 深圳供电局有限公司 | Test terminal platform and test system of transformer substation safety automatic device |
| CN113965422A (en) * | 2021-11-19 | 2022-01-21 | 湖北师范大学 | PoE power supply method and power supply device applied to ring network |
| CN114531308A (en) * | 2021-12-22 | 2022-05-24 | 深圳市联洲国际技术有限公司 | Get device of electricity and get electric equipment from PoE system |
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