WO2015123944A1 - 一种自动调整功率需求等级的受电方法及受电设备 - Google Patents
一种自动调整功率需求等级的受电方法及受电设备 Download PDFInfo
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- WO2015123944A1 WO2015123944A1 PCT/CN2014/079957 CN2014079957W WO2015123944A1 WO 2015123944 A1 WO2015123944 A1 WO 2015123944A1 CN 2014079957 W CN2014079957 W CN 2014079957W WO 2015123944 A1 WO2015123944 A1 WO 2015123944A1
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- Prior art keywords
- power
- level
- power level
- grading
- indication value
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- 238000000034 method Methods 0.000 title claims abstract description 63
- 238000001514 detection method Methods 0.000 claims abstract description 35
- 230000008569 process Effects 0.000 claims abstract description 29
- 238000012358 sourcing Methods 0.000 abstract description 2
- 230000006870 function Effects 0.000 description 14
- 238000010586 diagram Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/10—Current supply arrangements
Definitions
- the present invention relates to the field of Ethernet power supply technologies, and in particular, to a power receiving method and a power receiving device for automatically adjusting a power demand level.
- POE Power Over Ethernet
- POE technology can ensure the safety of related structured wiring while ensuring the normal operation of the relevant network and minimizing costs.
- a complete POE system consists of two parts: Power Sourcing Equipment (PSE) and Powered Device (PD).
- PSE Power Sourcing Equipment
- PD Powered Device
- the PSE device powers the PD device and is also the administrator of the entire POE Power over Ethernet process.
- the POE Ethernet power supply working process is shown in Figure 1. It is divided into the following four stages:
- the PSE device outputs a small voltage on the port until it detects that the cable termination is connected to a powered device that supports the IEEE 802.3af/at standard.
- the PSE device classifies the PD device and evaluates the power required by the PD device. In this process, the PSE sends a grading voltage while detecting the return current, and determines the power level of the PD based on the magnitude of the current.
- step 3 If the PSE power supply capacity is greater than the power required by the PD, proceed to step 3 to start power supply. If the PSE power supply capacity is less than the power required by the PD, power is not supplied. Return to step 1 and re-detect.
- the PSE device begins to supply power from the low voltage to the PD device until the required DC power is supplied. 4. Power off If the PD device is disconnected from the network, the PSE will quickly stop powering the PD device and repeat the detection process to detect whether the terminal of the cable is connected to the PD device.
- the power level indicated by the PD returning to the characteristic current during the classification process is the maximum value required for the equipment to operate.
- the device work often does not need to enable all functions or work at the highest performance, and the required power level is less than the power level fed back to the PSE.
- the PSE can only detect the maximum power demand, the PSE may determine that the detected PD power level is greater than the supply capability, and then the power supply is not performed, and the PD device cannot be powered on.
- the technical problem to be solved by the embodiments of the present invention is to provide a power receiving method and a power receiving device that automatically adjust the power demand level, and overcome the problem that the power level of the PD feedback is greater than the actual application requirement in the related POE system, and the PSE cannot be obtained. Power supply problems and defects.
- an embodiment of the present invention provides a power receiving method for automatically adjusting a power demand level, including:
- the method further includes: dividing the power level of the PD into N different ones and from large to large The power level of the small array, the power level is at most level 1, and the power level is at least level N; wherein, N is a positive integer.
- the method further includes: reducing the power level of the PD includes:
- the power level of the PD is set to the power level of the next level.
- the method further includes: The step of reducing the power level of the PD includes: using a timer to start timing after the end of the grading process, and when the value of the timer exceeds a maximum time interval of the PSE power supply, if the detection result is still no power supply, Then generating a "next power level"signal;
- the addition counter After each received a "next power level" signal, the output value of the addition counter is incremented by one to obtain a hierarchical indication value; wherein the addition counter is N-ary, and the hierarchical indication value indicates Switching to the power level of the next stage; using the memory to record the rating indicator value;
- the method further includes: selecting a characteristic resistance corresponding to the N power levels, and installing to the power level corresponding to the characteristic resistance On the circuit of the PD;
- the step of switching to the power level of the next level includes: closing only the circuit connection of the characteristic resistance corresponding to the power level and the PD according to the power level indicated by the hierarchical indication value, and disconnecting Other characteristic resistors are connected to the circuitry of the PD.
- the embodiment of the present invention further provides a power receiving device PD that automatically adjusts a power requirement, where the PD includes: an input voltage detecting module and a hierarchical switching module;
- the input voltage detecting module is configured to: detect whether the power supply device PSE supplies power to the PD after the grading process ends, and obtain a detection result;
- the hierarchical switching module is configured to: when the detection result is no power supply, reduce the power level of the PD.
- the device further includes: a grading module, configured to: after the input voltage detecting module detects whether the power supply device PSE supplies power to the powered device PD after the grading process ends, set N different and large To the power level of the small array, the power level is at most level 1, and the power level is at least level N; Let N be a positive integer.
- the hierarchical switching module is configured to reduce the power level of the PD by:
- the hierarchical switching module reduces the power level of the PD to a power level of the next level.
- the device further has the following features: the hierarchical switching module includes: a timer, an adding counter, and a memory; wherein, the timer is set to: start timing when the grading process ends, when the value of the timer When the maximum time interval of the PSE power supply is exceeded, if the detection result obtained by the input voltage detection module is still no power supply, a "next power level" signal is generated;
- the addition counter is set to: whenever a "next power level" signal is received, the output value of the addition counter is incremented by one to obtain a hierarchical indication value; wherein the addition counter is an N-ary, the classification The indication value indicates the power level of the next level to be switched to;
- the memory is configured to: record the hierarchical indication value
- the grading module is further configured to: switch to a power level of the next level according to the grading indication value.
- the device further has the following features: the grading module is further configured to: before the grading switching module reduces the power level of the PD, select a characteristic resistance corresponding to the N power levels, according to The power level corresponding to the characteristic resistance is mounted on the circuit of the PD;
- the grading module is configured to switch to a power level of the next level according to the grading indication value as follows:
- the grading module closes only the circuit resistance of the characteristic resistor corresponding to the power level and the circuit of the PD according to the power level indicated by the gradation indication value, and disconnects the circuit of the other characteristic resistor from the PD.
- the method and device according to the embodiments of the present invention have the following beneficial effects:
- the PD method and equipment for dynamically adjusting the power demand level have achieved advances in power grading of the POE system compared with the related technologies, and have been able to automatically adjust the power level according to the PSE power supply capability, thereby maximizing the use of the PSE power supply capability.
- the effect of more terminal equipment work improves the efficiency of the entire POE system.
- Figure 1 shows the workflow diagram of the relevant POE
- FIG. 2 is a schematic diagram of a method for receiving a power PD that automatically adjusts a power demand level according to an embodiment of the present invention
- FIG. 3 is a schematic diagram of a powered PD device for automatically adjusting a power demand level according to an embodiment of the present invention
- FIG. 4 is a schematic diagram showing a workflow of a power receiving method for automatically adjusting a power demand level according to an embodiment of the present invention
- FIG. 5 is a schematic diagram of a value switching process of a PD operating at a maximum power level according to an embodiment of the present invention
- FIG. 6 is a schematic diagram showing the process of switching the value indication of the PD in the fastest power-on state according to the embodiment of the present invention.
- an embodiment of the present invention provides a power receiving method for automatically adjusting a power demand level, where the method includes:
- Step S201 Detect whether the power supply device PSE supplies power to the power receiving device PD after the grading process ends, and obtains a detection result.
- Step S202 When the detection result is that there is no power supply, the power level of the PD is lowered.
- the detecting power supply device PSE is in a grading process Before the step of powering the powered device PD, the method may further include: dividing the power level of the PD into N different power levels arranged from largest to smallest, and the power level is up to the first level, the power The minimum level is the Nth level; where N is a positive integer.
- reducing the power level of the PD may be, but is not limited to: reducing the power level of the PD to a power level of the next level, that is, if the current power level of the PD is the M level. Then, the power level of the PD is switched to the M+1th level; the M is a positive integer less than or equal to N-1.
- the step of reducing the power level of the PD to the power level of the next level may include:
- timing starts after the grading process ends.
- the value of the timer exceeds the maximum time interval of the PSE power supply, if the detection result is still no power supply, the "next power level, signal" is generated;
- the addition counter After each received a "next power level" signal, the output value of the addition counter is incremented by one to obtain a hierarchical indication value; wherein the addition counter is N-ary, the hierarchical indication value indication The power level of the next level to switch to;
- the power level switched to the next level is indicated.
- the method may further include: selecting a characteristic resistance corresponding to the N power levels, according to the characteristic resistance a corresponding power level is mounted to the circuit of the PD;
- the step of switching to the power level of the next level according to the level indication value may specifically include:
- the characteristic resistance corresponding to the power level is closed to the circuit connection of the PD, and the other characteristic resistance is disconnected from the circuit of the PD.
- a power receiving method capable of automatically adjusting the power demand level is provided, and the PD returns a power level after detecting the grading voltage for the first time. If the PSE does not provide power after the classification is completed, the PD adjusts the functions and performance that can be provided in the next detection and classification, and automatically switches the power level of the next level to the PSE. The PSE judges whether it can supply power again. If it can, the PD is powered on. Otherwise, the PD switches to the next power level at the next detection level, and so on.
- FIG. 3 shows a specific flow chart of the above method using the embodiment of the present invention, including the following steps:
- Step S301 The hierarchical indication value indicates a power level, and the port voltage is checked.
- Step S302 Check if there is a detection voltage. If there is no detection voltage, go to step S301.
- Step S304 Detect whether there is a grading voltage, if there is a grading voltage, go to step S305; if there is no grading voltage, go to step S301.
- Step S305 Return the power level currently indicated by the hierarchical indication value.
- Step S306 Detect whether the PSE is powered. If there is power supply, go to step S307. If there is no power supply, go to step S308.
- Step S307 Record the maximum function and performance supported by the work, and limit the function and performance of the PD device, and perform step S309.
- Step S308 Switching the hierarchical indication value to the next power level (for example, adding the level indication value to 1), and executing step S302.
- Step S309 The PD works normally.
- Step S310 If any abnormality causes a power failure, step S301 is performed.
- the embodiment of the present invention further provides a power receiving device PD that automatically adjusts power requirements, as shown in FIG. 4,
- the input voltage detection module A, the detection module B and the power supply module E can be implemented by the same scheme as the related technology:
- the input voltage detecting module A is configured to: detect whether the PSE supplies power to the PD, and obtain a detection result.
- the module can detect the voltage value applied by the PSE device and determine the working phase.
- the PD starts or shuts down the relevant modules according to the obtained working phase.
- the detection module B is set to: During the detection phase of the power supply process, the PSE recognizes that the PD is a powered device that supports the IEEE 802.3af/at standard.
- the power module E is set to: accept the power supply from the PSE and convert it into the form of power required for each part of the device.
- the part of the power receiving apparatus different from the related art includes at least: a grading module C and a grading switching module 0.
- the grading module C is set to: return the current indicating the power level during the grading process, and inform the PSE of the required power level.
- the main difference between the grading module of the PD device of the present scheme and the PD device of the related art is that the related device can only return a current indicating the power level, which is the maximum power at which the device works.
- the PD device of the solution can automatically adjust the current, that is, when the PD is not powered after the grading process, the device automatically reduces the performance and functional requirements, returns a lower power demand level in the next grading process, and increases the PD power receiving operation. The opportunity to solve some of the problems that PD can't power on.
- the PD's grading function uses a characteristic resistor.
- the other paths of the circuit are turned off, causing the grading voltage to return to the grading characteristic current through the grading characteristic resistance.
- the PSE knows the power level of the PD by detecting the current.
- the storage device is used to record the functions and performance that each power level can achieve, and is used to control the functions and performance of the device after power-on.
- the different power levels and function control words described above need to be designed and burned before the device is used.
- the workflow of the classification module C can include the following steps:
- N different power levels are set according to different scenarios and requirements of the device application. At the same time, determine the function and performance of the N power levels.
- N power levels are arranged from large to small.
- the power level is up to level 1 and the minimum is level N.
- Such an arrangement facilitates the implementation of power step-by-step switching.
- the characteristic resistance corresponding to the N power levels is selected and installed on the PD device according to the power level corresponding to the characteristic resistance.
- the function control words corresponding to the N power levels are burned to the storage device to control the work after the powered device is powered on, so as to avoid exceeding the allowed power.
- the hierarchical switching module D implements a hierarchical indication function, and the control classification module C returns currents indicating different power levels in different situations.
- This module is a new module for the related PD, which enables the power level switching function to proceed smoothly.
- the hierarchical switching module D may specifically include a timer, an addition counter, and a memory.
- the timer is used to generate a "switch grading indicator value to next power level" signal.
- the maximum time interval from the end of the grading process to the PSE supply is set in the timer. Whenever the grading process is finished, the timer is turned on. When the timer expires, it means that the PSE cannot supply power to the PD. At this point, a “switching grade indication value to the next power level is generated, and the signal is sent to the counter for the counter to increment by one.
- the addition counter is an asynchronous addition counter of N (N is the power level designed by the PD).
- N is the power level designed by the PD.
- the initial value of the counter is 1 and the input pulse is the "switching the grading indication value to the next power level” signal. After each "switching the grading indication value to the next power level” signal is detected, the output value is incremented by 1, and the grading indication value at this time is obtained, and the grading indication value is recorded in the memory.
- the hierarchical indication value of the memory record can be obtained according to the algorithm and the output value of the addition counter.
- the classification indication value is set as the output value of the addition counter, which is different according to different demand goals. Please refer to the description of the method contents for other functions of the device.
- FIG. 5 a schematic diagram of an embodiment of a handover procedure in which a PD operates at a maximum power level grading indication value is provided.
- This implementation goal requires that the PD start at the highest power level after each power-up and gradually reduce the demand level until the PSE powers the PD. This ensures that the PD is operating at the maximum allowed functionality and performance.
- This implementation sets the initial value of the counter to 1, that is, the hierarchical indication value indicates the first level of the power level, that is, the highest level.
- the counter is incremented by 1 each time a switching level indication signal is detected, and the count value is stored in the memory.
- the counter is the same as the number of power levels designed by the PD.
- Step S501 Start.
- Step S502 The initial value of the hierarchical indication value is 1, that is, the hierarchical indication value indicates the first level of the power level.
- Step S503 The input pulse is "switching the hierarchical indication value to the next power level".
- Step S504 It is determined whether the current hierarchical indication value is equal to N; if the hierarchical indication value is equal to N, step S502 is performed; if the hierarchical indication value is not equal to N, step S505 is performed.
- Step S505 The level indication value is incremented by 1, and step S503 is performed.
- FIG. 6 a schematic diagram of an embodiment of a handover procedure in which the PD operates at the highest power-on status grading indication value is provided.
- the PD is powered on at the fastest time. It is required that the PD device records the previous working mode after the power is cut off, and returns the power level of the previous working to the PSE at the next power leveling.
- This scheme is suitable for the work environment without change, except that the network cable of the PD device is disconnected and reconnected. It is necessary to design a non-volatile memory to record the rating indicator value and save the value after power off. The value of this value is set to 1.
- Step S601 Start.
- Step S602 The hierarchical indication value is equal to the memory record value.
- Step S603 The input pulse is "switching the hierarchical indication value to the next power level".
- Step S604 It is determined whether the current hierarchical indication value is equal to N; if the hierarchical indication value is equal to N, step S605 is performed: If the hierarchical indication value is not equal to N, step S606 is performed.
- Step S605 The level indication value is set to be equal to 1, and step S603 is performed.
- Step S606 The level indication value is incremented by 1, and step S603 is performed.
- the method and device according to the embodiment of the present invention have the following beneficial effects: a PD method and a device capable of automatically adjusting a power demand level, and achieving an improvement in power grading of a POE system compared to related technologies, achieving The PSE power supply capability automatically adjusts the power level to maximize the PSE power supply capability, achieves the effect of making more terminal equipment work, and improves the efficiency of the entire POE system. Therefore, it has strong industrial applicability.
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RU2016133156A RU2654514C2 (ru) | 2014-02-20 | 2014-06-16 | Способ питания и питаемое устройство для автоматического регулирования уровня силовой нагрузки |
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CN201410058252.XA CN104869002A (zh) | 2014-02-20 | 2014-02-20 | 一种自动调整功率需求等级的受电方法及受电设备 |
CN201410058252.X | 2014-02-20 |
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Cited By (1)
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EP4199429A4 (en) * | 2020-09-09 | 2023-08-30 | Huawei Technologies Co., Ltd. | NETWORK ENERGY PROCUREMENT SYSTEM |
Families Citing this family (4)
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CN107786345A (zh) * | 2016-08-26 | 2018-03-09 | 北京安拓伟业科技发展有限公司 | 大功率长距离标准poe分离器、poe系统及poe系统控制方法 |
CN109120414B (zh) * | 2017-06-22 | 2020-09-18 | 华为技术有限公司 | 一种用于PoE的供电方法、控制设备及供电端设备 |
CN111181737B (zh) | 2018-11-12 | 2021-09-14 | 华为技术有限公司 | 控制方法、受电设备和系统 |
CN110169885B (zh) * | 2019-04-25 | 2021-03-09 | 青岛市中心医院 | 外科术后患者服务装置 |
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JP2009089258A (ja) * | 2007-10-02 | 2009-04-23 | Mitsubishi Electric Corp | 受電装置、給電装置および電力伝送システム |
US20090217062A1 (en) * | 2008-02-25 | 2009-08-27 | Broadcom Corporation | System and method for communicating information relating to powered device power interruption and associated power sourcing equipment fallback power |
US20090217088A1 (en) * | 2008-02-22 | 2009-08-27 | Broadcom Corporation | Power over ethernet powered device with power fallback states |
CN101707380A (zh) * | 2008-07-21 | 2010-05-12 | 北京星网锐捷网络技术有限公司 | 供电系统配置方法、装置及系统 |
CN102123034A (zh) * | 2011-02-28 | 2011-07-13 | 中兴通讯股份有限公司 | 利用poe系统进行高低压选择供电的方法及装置 |
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RU2371813C1 (ru) * | 2008-01-29 | 2009-10-27 | Открытое акционерное общество "Ракетно-космическая корпорация "Энергия" им. С.П. Королева" | Автономная система энергопитания и способ ее эксплуатации |
-
2014
- 2014-02-20 CN CN201410058252.XA patent/CN104869002A/zh not_active Withdrawn
- 2014-06-16 RU RU2016133156A patent/RU2654514C2/ru active
- 2014-06-16 WO PCT/CN2014/079957 patent/WO2015123944A1/zh active Application Filing
Patent Citations (5)
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JP2009089258A (ja) * | 2007-10-02 | 2009-04-23 | Mitsubishi Electric Corp | 受電装置、給電装置および電力伝送システム |
US20090217088A1 (en) * | 2008-02-22 | 2009-08-27 | Broadcom Corporation | Power over ethernet powered device with power fallback states |
US20090217062A1 (en) * | 2008-02-25 | 2009-08-27 | Broadcom Corporation | System and method for communicating information relating to powered device power interruption and associated power sourcing equipment fallback power |
CN101707380A (zh) * | 2008-07-21 | 2010-05-12 | 北京星网锐捷网络技术有限公司 | 供电系统配置方法、装置及系统 |
CN102123034A (zh) * | 2011-02-28 | 2011-07-13 | 中兴通讯股份有限公司 | 利用poe系统进行高低压选择供电的方法及装置 |
Cited By (1)
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EP4199429A4 (en) * | 2020-09-09 | 2023-08-30 | Huawei Technologies Co., Ltd. | NETWORK ENERGY PROCUREMENT SYSTEM |
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RU2016133156A3 (zh) | 2018-03-23 |
RU2654514C2 (ru) | 2018-05-21 |
CN104869002A (zh) | 2015-08-26 |
RU2016133156A (ru) | 2018-03-23 |
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