CN102983982A - A method, a system, and a multi-port powered device for equal voltage distribution - Google Patents
A method, a system, and a multi-port powered device for equal voltage distribution Download PDFInfo
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- CN102983982A CN102983982A CN2011102591074A CN201110259107A CN102983982A CN 102983982 A CN102983982 A CN 102983982A CN 2011102591074 A CN2011102591074 A CN 2011102591074A CN 201110259107 A CN201110259107 A CN 201110259107A CN 102983982 A CN102983982 A CN 102983982A
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Abstract
The present invention discloses a method, a system, and a multi-port powered device for equal voltage distribution. The method comprises: after each power feed device is powered on, the multi-port powered device periodically sending a query message to each power feed device to check the output voltage value of the power feed device; after the output voltage value fed back by each power feed device is received, the multi-port powered device detects the received voltage value from each power feed device; according to the detected voltage value from each power feed device and the output voltage value of each power feed device, the path loss of the Ethernet cables between each power feed device and the multi-port powered device is detected; according to the path loss and an average voltage value detected by the multi-port powered device, a desired output voltage value of each power feed device is obtained by calculating individually; and the desired output voltage value of each power feed device is separately sent to each power feed device to control the output value of each power feed device. According to the method, system and device of the invention, the reasonability and fairness of the broadband access terminal equipment reversely powered through the Ethernet are improved.
Description
Technical field
The present invention relates to broadband access network, especially, relate to a kind of average voltage distribution method, system and multiport power receiving equipment.
Background technology
Find in extensive broadband access network process of construction that at present access terminal equipment power taking difficulty in part position causes and can't install, even inadequate installation also is that the maintenance personnel has laid the 220V power line, has the low problem of installation effectiveness.Oppositely the Power over Ethernet technology then can be transmitted power supply by ethernet line, rely on Ethernet feed equipment (Power over Ethernet, PoE) the power supply transformation with 220V is low-voltage DC, and jointly in category-5 cable, transmit with the Ethernet data signal, reach the purpose of reverse power supply.
But, because category-5 cable transmission performance and reverse Ethernet feed equipment be the property of there are differences all, can't realize the mean allocation of power supply so cause reverse Ethernet system inside, thereby so that some wide band access user power consumption is many, the electric lighting bill is heavy, even can not use broadband services with power supply and other user power utilization amounts are little yet, the charge for electricity is small, and the user is not had fairness.
Summary of the invention
The technical problem that the present invention will solve provides a kind of average voltage distribution method, system and multiport power receiving equipment, can realize the mean allocation of voltage in reverse Power over Ethernet system.
According to an aspect of the present invention, proposed a kind of average voltage distribution method, after being included in each feed equipment and powering on, the multiport power receiving equipment sends query messages to inquire about the output voltage values of each feed equipment to each feed equipment periodically; Behind the output voltage values that receives each feed equipment feedback, the multiport power receiving equipment detects the magnitude of voltage from each feed equipment that self receives; Determine that from the magnitude of voltage of each feed equipment and the output voltage values of each feed equipment each feed equipment is to the Ethernet cable path loss between the multiport power receiving equipment according to what detect; The average voltage level that detects according to path loss and multiport power receiving equipment calculates respectively the desired output magnitude of voltage of each feed equipment, and the desired output magnitude of voltage of each feed equipment is sent to respectively each feed equipment to control the output voltage values of each feed equipment.
According to a further aspect in the invention, also propose a kind of multiport power receiving equipment, comprised the voltage query unit, be used for after each feed equipment powers on, sent query messages to inquire about the output voltage values of each feed equipment to each feed equipment periodically; Voltage detection unit links to each other with the voltage query unit, is used for detecting the magnitude of voltage from each feed equipment that self receives behind the output voltage values that receives each feed equipment feedback; The path loss determining unit, link to each other with voltage detection unit with the voltage query unit, be used for determining that from the magnitude of voltage of each feed equipment and the output voltage values of each feed equipment each feed equipment is to the Ethernet cable path loss between the multiport power receiving equipment according to what detect; The desired value determining unit, link to each other with the path loss determining unit, be used for calculating respectively according to the average voltage level that path loss and multiport power receiving equipment detect the desired output magnitude of voltage of each feed equipment, and the desired output magnitude of voltage of each feed equipment is sent to respectively each feed equipment to control the output voltage values of each feed equipment.
According to another aspect of the invention, also propose a kind of average voltage distribution system, comprised the multiport power receiving equipment; A plurality of feed equipments link to each other with the multiport power receiving equipment by the Ethernet cable respectively, be used to the multiport power receiving equipment provide power supply, with the multiport power receiving equipment alternately and accept the multiport power receiving equipment to the control of output voltage.
Average voltage distribution method provided by the invention, system and multiport power receiving equipment, control the Voltage-output of each feed equipment to the Ethernet cable path loss between the multiport power receiving equipment by measuring each feed equipment, so that each the road voltage when arriving the multiport power receiving equipment is identical, thereby the average voltage of having realized internal system distributes.The present invention has improved reasonability, fairness, the fail safe of the reverse Power over Ethernet of broadband access terminal device, be conducive to promote based on the extensive promotion and application of reverse Power over Ethernet technology in broadband access network, when realizing the broadband access network construction, create preferably social benefit and economic benefit.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part.In the accompanying drawings:
Fig. 1 is the schematic diagram that the present invention powers by reverse Ethernet.
Fig. 2 is the schematic flow sheet of an embodiment of average voltage distribution method of the present invention.
Fig. 3 is that power operation of the present invention is safeguarded OAM protocol frame format schematic diagram.
Fig. 4 is the schematic flow sheet of another embodiment of average voltage distribution method of the present invention.
Fig. 5 is the structural representation of an embodiment of multiport power receiving equipment of the present invention.
Fig. 6 is the structural representation of another embodiment of multiport power receiving equipment of the present invention.
Fig. 7 is the structural representation of an embodiment of average voltage distribution system of the present invention.
Embodiment
With reference to the accompanying drawings the present invention is described more fully, exemplary embodiment of the present invention wherein is described.Exemplary embodiment of the present invention and explanation thereof are used for explaining the present invention, but do not consist of improper restriction of the present invention.
Below be illustrative to the description only actually of at least one exemplary embodiment, never as any restriction to the present invention and application or use.
Fig. 1 is the schematic diagram that the present invention powers by reverse Ethernet.
As shown in Figure 1, for solving based on broadband access terminal the power taking hard problem is installed, it can be the terminal power supply by the method for reverse Power over Ethernet, particularly, each side feed equipment of user (Power Sourcing Equipment, PSE), namely, the equipment of Ethernet cable right-hand component among Fig. 1, the 220V alternating current is converted to low-voltage DC, together with the Ethernet data signal (for example, can comprise (the Point-to-Point Protocol over Ethernet of peer-peer protocol on user's Ethernet, PPPoE) online, Web TV (Internet Protocol Television, IPTV), IP speech (Voice over IP, the Ethernet data of business such as VOIP)) after superpose (that is, voltage also is modulated on the Ethernet cable with certain frequency and transmits with data-signal) together at 1/2 of Ethernet cable, 3/6 or 4/5,7/8 line is to upper transmission.In addition, at far-end/outside configuration power receiving equipment (Power Device, PD), that is, the equipment of Ethernet left-hand component among Fig. 1 receives Ethernet data and low-voltage DC simultaneously, and low-voltage DC is separated with data-signal.Low-voltage DC is converted to the needed DC power supply realization of terminal broadband access terminal oppositely powers.But when oppositely powering for the multiport broadband access terminal, owing to each category-5 cable transmission performance, the reverse Power over Ethernet device property of there are differences, can't guarantee the power distribution of average power supply when causing a plurality of PSE that are deployed in user's side to be multiport PD power supply.For realizing the power supply mean allocation, following embodiment of the present invention in original system PSE and PD equipment in increased the related hardware chip, each PSE and PD equipment possess independently medium access control layer (Mdium Access Control, MAC) address, can be used for realizing that PD is to the maintenance and management of PSE, for example, by Operations,Administration And Maintenance (Operation, Administration and Maintenance, OAM) interacting message finish the numerical value such as voltage, electric current inquiry, return, the operation such as configuration.In addition, can also be for detection of the fault of PSE, in case PSE integrated also need battery carried out the work such as regular maintenance, detection behind the lithium battery.
Following embodiment of the present invention is towards the broadband access network multiple users, utilize reverse Power over Ethernet technology to realize that the average voltage of each feed equipment in the electric power system distributes, particularly, Operation and Maintenance agreement based on power supply realizes that the multiport power receiving equipment is to the detection of each feed equipment power supply characteristic, the power source performance that receives in conjunction with the multiport power receiving equipment, control the power supply of each feed equipment by reasonable algorithm and export, to realize the mean allocation of supply voltage.
Fig. 2 is the schematic flow sheet of an embodiment of average voltage distribution method of the present invention.
As shown in Figure 2, this embodiment can may further comprise the steps:
S202, after each feed equipment powered on, the multiport power receiving equipment sent the output voltage values (that is, the magnitude of voltage at shown in Figure 1 node 2 places) of query messages to inquire about each feed equipment to each feed equipment periodically;
S204, behind the output voltage values that receives each feed equipment feedback, the multiport power receiving equipment detects the magnitude of voltage from each feed equipment that self receives;
S206 determines that from the magnitude of voltage of each feed equipment and the output voltage values of each feed equipment each feed equipment is to the Ethernet cable path loss between the multiport power receiving equipment according to what detect;
S208, the average voltage level that detects according to path loss and multiport power receiving equipment calculates respectively the desired output magnitude of voltage of each feed equipment, and the desired output magnitude of voltage of each feed equipment is sent to respectively each feed equipment to control the output voltage values of each feed equipment.
This embodiment controls the Voltage-output of each feed equipment to the Ethernet cable path loss between the multiport power receiving equipment by measuring each feed equipment, so that each the road voltage when arriving the multiport power receiving equipment is identical, thereby the average voltage of having realized internal system distributes.The present invention has improved reasonability, fairness, the fail safe of the reverse Power over Ethernet of broadband access terminal device.
In order to improve efficiency of transmission, each feed equipment transfers to the multiport power receiving equipment by the Ethernet cable afterwards with dc signal and data-signal mixing; The multiport power receiving equipment separates dc signal after the mixed signal that receives from each feed equipment with data-signal, and utilizes the dc signal realization to the reverse power supply of multiport power receiving equipment.
In addition, multiport power receiving equipment and each feed equipment utilize the Operation and Maintenance agreement to realize each other mutual, carry out identifying corresponding equipment by the MAC Address of each equipment when mutual at multiport power receiving equipment and each feed equipment.
Particularly, the present invention is with reference to the OAM agreement of IEEE 802.3 standards, defined and realized OAM agreement and the related protocol frame that power management is safeguarded, be used for oppositely realizing the power supply of multiport PD power receiving equipment and PSE feed equipment is detected and control in the Power over Ethernet system.For realizing this purpose, embodiments of the invention have completely newly defined maintenance management interaction message between multiport PD power receiving equipment and the PSE feed equipment based on the OAM protocol format.
Fig. 3 is that power operation of the present invention is safeguarded OAM protocol frame format schematic diagram.
As shown in Figure 3, the OAM protocol frame format is described as follows:
Destination address (Destination Address): the MAC Address of PD or PSE equipment;
Source address (Source Address): the MAC Address of PSE or PD equipment;
Length/Type:OAM Packet Data Unit (Packet Data Unit, PDU) adopt the Type coding, Type mainly identifies the type of this message, for example, this field can be 0x8809 in EPON, and being used for this OAM message of sign is a slow protocol frame;
Data/PAD: this field is used for the payload of sign OAM protocol frame, comprises mechanism's unique identification (OUI), extended operation code (Ext.Opcode), load (Payload).
Wherein, OUI can be used to indicate mechanism's identifier of China Telecom, reserves at present uncertain; Ext.Opcode is used to indicate the voltage properties of the voltage properties of PD inquiry PSE, voltage properties that PSE returns PD, PD configuration PSE and PSE and returns PD whether successful attribute be set, for example, Ext.Opcode=03 sign PD configuration PSE, other are defined as: 01 sign PD inquiry PSE, the inquiry of 02 sign PSE feedback PD, whether the setting of 04 sign PSE feedback PD successfully waits; Payload is used to indicate effective voltage attribute and the PSE that PD arranges PSE and returns the attributes such as voltage that PD inquires about.
Following table 1 and table 2 are the PD of embodiment of the invention definition and the field description example of the inquiry between the PSE and configuration:
Table 1
Table 2
Whether wherein, detect the PSE input voltage is whether 220V can understand PSE and power on normal; Detect the PSE output voltage and can understand and have fault-free to cause guaranteeing that direct current outputs on the Ethernet cable, detect the PSE output current and can understand whether safety of PoE system works electric current, the too high meeting of electric current causes the faults such as the Ethernet cable is aging, short circuit.
Fig. 4 is the schematic flow sheet of another embodiment of average voltage distribution method of the present invention.
As shown in Figure 4, this embodiment can may further comprise the steps:
S402, after PSE powered on, PD periodically sent Query Information to inquire about each PSE at the output voltage values V at node 2 places
PSE1, V
PSE2V
PSEn, can describe this OAM message in the Ext.Opcode of query messages field is query messages, its payload field void value can fill out 0;
S404, receive the output voltage of PSE feedback as PD after, again detect the receiver voltage V of PD end
PD1, V
PD2V
PDn(through the transmission of Ethernet cable);
S406, because the output voltage when (1) PSE itself dispatches from the factory may be inconsistent, there is certain error, (2) through after long-term the use, output voltage also can drift about, (3) through after the transmission of Ethernet cable, because the material of the Ethernet cable of different user is different, the resistance difference causes loss different, the voltage of arrival PD also different (4) is also different owing to each user's house wiring length, and the netting twine resistance value also can be variant, causes existing voltage difference, so the PD end can pass through formula Δ V
PDn=V
PSEn-V
PDnCalculate each PSE to the voltage difference between the PD: Δ V
PD1, Δ V
PD2Δ V
PDn
S408 adjusts the output voltage of each PSE by following method, guarantees to arrive the magnitude of voltage consistent (having allowed certain error) of PD end, to realize the mean allocation of supply voltage:
A) calculate the average received voltage that PD holds:
Vp＝(V
PD1+V
PD2+…+V
PDn)/n；
B) based on the power-source maintenance management agreement each PSE output voltage is controlled, the output voltage of each PSE is adjusted to:
V
PSE1’＝Vp+ΔV
PD1
V
PSE2’＝Vp+ΔV
PD2
…
V
PSEn’＝Vp+ΔV
PDn。
One of ordinary skill in the art will appreciate that, whole and the part steps of realization said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computing equipment read/write memory medium, this program is when carrying out, execution comprises the step of said method embodiment, and two aforesaid storage mediums can comprise the various media that can be program code stored such as ROM, RAM, magnetic disc and CD.
Fig. 5 is the structural representation of an embodiment of multiport power receiving equipment of the present invention.
As shown in Figure 5, the multiport power receiving equipment 50 of this embodiment can comprise:
Voltage query unit 51 is used for after each feed equipment powers on, and sends query messages to inquire about the output voltage values of each feed equipment to each feed equipment periodically;
Voltage detection unit 52 links to each other with voltage query unit 51, is used for detecting the magnitude of voltage from each feed equipment that self receives behind the output voltage values that receives each feed equipment feedback;
Path loss determining unit 53, link to each other with voltage detection unit 52 with voltage query unit 51, be used for determining that from the magnitude of voltage of each feed equipment and the output voltage values of each feed equipment each feed equipment is to the Ethernet cable path loss between the multiport power receiving equipment according to what detect;
Desired value determining unit 54, link to each other with path loss determining unit 53, be used for calculating respectively according to the average voltage level that path loss and multiport power receiving equipment detect the desired output magnitude of voltage of each feed equipment, and the desired output magnitude of voltage of each feed equipment is sent to respectively each feed equipment to control the output voltage values of each feed equipment.
This embodiment controls the Voltage-output of each feed equipment to the Ethernet cable path loss between the multiport power receiving equipment by measuring each feed equipment, so that each the road voltage when arriving the multiport power receiving equipment is identical, thereby the average voltage of having realized internal system distributes.The present invention has improved reasonability, fairness, the fail safe of the reverse Power over Ethernet of broadband access terminal device.
Fig. 6 is the structural representation of another embodiment of multiport power receiving equipment of the present invention.
As shown in Figure 6, compare with embodiment among Fig. 5, the multiport power receiving equipment 60 of this embodiment can also comprise:
Signal separation unit 61, link to each other with voltage detection unit 52, be used for after the mixed signal that receives from each feed equipment, wherein dc signal is separated with data-signal, and utilize dc signal to realize reverse power supply to the multiport power receiving equipment.
In addition, the multiport power receiving equipment of above-described embodiment utilizes the mutual of the realization of Operation and Maintenance agreement and each feed equipment, and when mutual, the multiport power receiving equipment is identified each feed equipment by MAC Address.
Fig. 7 is the structural representation of an embodiment of average voltage distribution system of the present invention.
As shown in Figure 7, the average voltage distribution system 70 of this embodiment can comprise:
Multiport power receiving equipment 71, particularly, it can be realized by the embodiment among Fig. 5 or Fig. 6;
A plurality of feed equipments 72 link to each other with the multiport power receiving equipment by the Ethernet cable respectively, be used to the multiport power receiving equipment provide power supply, with the multiport power receiving equipment alternately and accept the multiport power receiving equipment to the control of output voltage.
When multiport power receiving equipment and a plurality of feed equipment were mutual, each feed equipment and multiport power receiving equipment were all identified mutually by MAC Address.
The present invention is based on the power-source maintenance management agreement and finish power supply detection and control, realize the power supply mean allocation by rational algorithm.This invention major advantage has: realize convenient, use simple, reliable and stable, safety is easy-to-use, be specially adapted to the multiport broadband access terminal is realized the places such as reverse Power over Ethernet.The application ease for use and the easy popularized type that bring because of this invention are strong especially, can bring considerable social benefit and economic benefit.
Each embodiment all adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed is and the difference of other embodiment that part identical with similar between each embodiment can cross-references.For device embodiment because itself and embodiment of the method basic simlarity, so describe fairly simple, relevant part can be referring to embodiment of the method explanation partly.
Although by example specific embodiments more of the present invention are had been described in detail, it should be appreciated by those skilled in the art that above example only is in order to describe, rather than in order to limit the scope of the invention.It should be appreciated by those skilled in the art, can in situation about not departing from the scope of the present invention with spirit, above embodiment be made amendment.Scope of the present invention is limited by claims.
Claims (10)
1. an average voltage distribution method is characterized in that, comprising:
After each feed equipment powered on, the multiport power receiving equipment sent query messages to inquire about the output voltage values of described each feed equipment to described each feed equipment periodically;
Behind the output voltage values that receives described each feed equipment feedback, described multiport power receiving equipment detects the magnitude of voltage from described each feed equipment that self receives;
Determine that from the magnitude of voltage of described each feed equipment and the output voltage values of described each feed equipment described each feed equipment is to the Ethernet cable path loss between the described multiport power receiving equipment according to what detect;
The average voltage level that detects according to described path loss and described multiport power receiving equipment calculates respectively the desired output magnitude of voltage of described each feed equipment, and the desired output magnitude of voltage of described each feed equipment is sent to respectively described each feed equipment to control the output voltage values of described each feed equipment.
2. average voltage distribution method according to claim 1 is characterized in that, described method also comprises:
Described each feed equipment transfers to described multiport power receiving equipment by described Ethernet cable afterwards with dc signal and data-signal mixing;
Described multiport power receiving equipment separates described dc signal after the mixed signal that receives from described each feed equipment with described data-signal, and utilizes described dc signal realization to the reverse power supply of described multiport power receiving equipment.
3. average voltage distribution method according to claim 1 is characterized in that, utilizes the Operation and Maintenance agreement to realize mutual between described multiport power receiving equipment and described each feed equipment.
4. average voltage distribution method according to claim 3 is characterized in that, carries out identifying corresponding equipment by the MAC Address of each equipment when mutual at described multiport power receiving equipment and described each feed equipment.
5. a multiport power receiving equipment is characterized in that, comprising:
The voltage query unit is used for after each feed equipment powers on, and sends query messages to inquire about the output voltage values of described each feed equipment to described each feed equipment periodically;
Voltage detection unit links to each other with described voltage query unit, is used for detecting the magnitude of voltage from described each feed equipment that self receives behind the output voltage values that receives described each feed equipment feedback;
The path loss determining unit, link to each other with described voltage detection unit with described voltage query unit, be used for determining that from the magnitude of voltage of described each feed equipment and the output voltage values of described each feed equipment described each feed equipment is to the Ethernet cable path loss between the described multiport power receiving equipment according to what detect;
The desired value determining unit, link to each other with described path loss determining unit, be used for calculating respectively according to the average voltage level that described path loss and described multiport power receiving equipment detect the desired output magnitude of voltage of described each feed equipment, and the desired output magnitude of voltage of described each feed equipment is sent to respectively described each feed equipment to control the output voltage values of described each feed equipment.
6. multiport power receiving equipment according to claim 5 is characterized in that, described multiport power receiving equipment also comprises:
Signal separation unit, link to each other with described voltage detection unit, be used for after the mixed signal that receives from described each feed equipment, wherein dc signal is separated with data-signal, and utilize described dc signal to realize reverse power supply to described multiport power receiving equipment.
7. multiport power receiving equipment according to claim 5 is characterized in that, described multiport power receiving equipment utilizes the mutual of the realization of Operation and Maintenance agreement and described each feed equipment.
8. multiport power receiving equipment according to claim 7 is characterized in that, described multiport power receiving equipment is by described each feed equipment of MAC Address identification.
9. an average voltage distribution system is characterized in that, comprising:
Each described multiport power receiving equipment in the claim 5 to 8;
A plurality of feed equipments, link to each other with described multiport power receiving equipment by the Ethernet cable respectively, be used to described multiport power receiving equipment provide power supply, with described multiport power receiving equipment alternately and accept described multiport power receiving equipment to the control of output voltage.
10. average voltage distribution system according to claim 9 is characterized in that, described each feed equipment is identified described multiport power receiving equipment by MAC Address.
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| 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 |
| 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 |
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