CN101710860A - Customer premises equipment and method for realizing power control - Google Patents
Customer premises equipment and method for realizing power control Download PDFInfo
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Abstract
The invention provides customer premises equipment and a method for realizing power control. The customer premises equipment (CPE) is compatible with the traditional Ethernet interface, and a power device (PD) power control module with a Power over Ethernet (POE) interface meeting an IEEE802.33af standard and an IEEE802.3at standard realizes the control of a power interface of the CPE. The CPE is also compatible with an external power adaptor serving as an external power supply of the CPE so as to provide a realizing mode of stand-by power supply for a user. The PD power control module realizes seamless transition from power sourcing equipment (PSE) power supply to external power adaptor power supply, and the using performance of the CPE is not influenced. Meanwhile, the PD power control module is arranged, so the CPE is compatible with two power supply modes of a mid-span method and an end-span method of the POE, and the universality of the CPE is ensured. Through the CPE provided by the invention and the power control method thereof, the power supply selectivity of the CPE is improved, the cost of the CPE is reduced, and convenience is brought to users.
Description
Technical Field
The invention relates to a POE local area network power management technology, in particular to a CPE based on a POE interface and a method for realizing power control. The invention is suitable for the cable communication terminal product of Customer Premise Equipment (CPE) of the Ethernet power supply system.
Background
Power Over Ethernet (POE) refers to a technology that can provide dc Power for IP-based terminals, such as IP phones, wireless local area network Access Points (APs), and network cameras, while transmitting data signals for these devices, without modifying the existing Ethernet cat.5 wiring infrastructure. The POE technology can ensure the safety of the existing structured wiring, ensure the normal operation of the existing network and reduce the cost to the maximum extent.
Currently, the POE industry adopts two standards, IEEE802.3af and IEEE802.3at, and the IEEE802.3af standard specifies that a power supply device can supply power to a powered device with power below 13W through ethernet, which is sufficient for traditional IP phones and webcams. However, with the advent of high power applications such as dual band access, video telephony, PTZ video surveillance systems, and the like, the 13W supply power is obviously not sufficient. IEEE began to develop a new POE standard 802.3at (POE plus) in 2005 to boost the power that POE can deliver. Compared with 802.3af, 802.3at can output more than 2 times of electric power, and the output power of each port can be more than 30W, thereby greatly widening the application field of POE.
The standard five-type of cable has four twisted pairs, but only two of these pairs are used in 10M BASE-T and 100M BASE-T. IEEE802.3af allows two power modes, intermediate-Span (Mid-Span) and End-Span (End-Span). Wherein, in Mid-Span, the idle pin supplies power: 4. the pin 5 is connected as a positive electrode, and the pins 7 and 8 are connected as a negative electrode; in the End-Span, a data pin is used for supplying power, and a DC power supply is added to the midpoint of a transmission transformer, so that the transmission of data is not influenced. In this manner pairs 1, 2 and pairs 3, 6 may be of any polarity. The Power Sourcing Equipment (PSE) can only provide one Power supply mode, but the Power Device (PD) must be capable of adapting to both Power supply modes.
At present, POE lan technology is widely used in enterprise and industrial applications. According to statistics, in 2006, the delivery volume of power over ethernet is 3200 ten thousand ports, and in 2011, the delivery volume is increased to 1.45 hundred million ports, and the annual growth rate is over 30%. Several chip manufacturers such as LINEAR, MAXIM, etc. have successively introduced control chips for POE network power supply end devices and power receiving end devices.
Fig. 1 is a schematic diagram of a configuration of a CPE based on a conventional ethernet interface, and as shown in fig. 1, power supply of the CPE is provided by a dc power supply output by an external power adapter, and then reasonably distributed to each unit of the CPE through a power module. The processor module is connected with the Ethernet Interface module through a Media Independent Interface (MII), and the MII Interface signal is converted into a standard RJ45 signal to be communicated with external network equipment. The power supply module is used for converting the power supply processing accessed from the external power supply adapter and then reasonably distributing the converted power supply processing to other functional modules in the CPE. On one hand, the existing CPE shown in fig. 1 needs to additionally provide a suitable power adapter for the CPE, and has poor universality and high cost; on the other hand, the user is inconvenient to use.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a customer premise equipment, which can improve power supply selectivity in a CPE, reduce the cost of the CPE, and facilitate the use of a user.
Another objective of the present invention is to provide a method for implementing power control for a ue, which can improve power supply selectivity in a CPE, reduce the cost of the CPE, and facilitate the use of the user.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a customer premise equipment, including power module, Ethernet interface module, processor module, peripheral equipment interface module, wireless access module, still include: the PD power supply control module is used for controlling the power supply,
and the PD power supply control module is used for switching a power supply accessed by the PSE or an external power adapter to a power supply module of the CPE, and after the power supply module processes and transforms the power supply, the power supply module redistributes the power supply to other functional modules in the CPE.
The power module is used for charging the CPE in normal work of the CPE and supplying power to the CPE when the POE network or a power supply accessed by an external power adapter does not exist.
The PD power supply control module is provided with a POE interface which accords with IEEE802.3af standard and IEEE802.3at standard.
Also includes a battery module;
and when the POE network does not exist, an external power adapter is adopted to supply power or the electric energy stored in the battery module is used for supplying power to the CPE.
In the POE power supply when adopting the POE network, the PD power supply control module is further configured to switch the power supply to the external power adapter when detecting that there is the external power adapter.
The Ethernet interface module is a single RJ45 interface with POE function; or,
two RJ45 interfaces with POE function; or,
one network port adopts an RJ45 interface with POE function, and the other network port adopts a common RJ45 interface.
Further comprising: a USB interface, and/or a memory module, and/or a WiFi module, and/or a memory card module.
A method for realizing power control by user end equipment comprises the following steps:
when the POE network is adopted, the PSE detects the power level and determines that power can be provided for the CPE;
the PSE supplies power to the CPE, whether an external power supply exists is judged, and if yes, the external power supply is adopted to supply power to the CPE; otherwise, the PSE is continuously adopted to supply power to the CPE.
The method further comprises the following steps: and when the POE network does not exist, an external power adapter is adopted to supply power or a battery is used for supplying power to the CPE.
The battery module is present in the CPE, and in the power supply for the CPE by the PSE, the method further includes: charging the battery module.
And when the PSE supplies power to the CPE, switching the power supply to the external power adapter if the external power adapter is detected.
According to the technical scheme provided by the invention, the CPE is compatible with the traditional Ethernet interface and the PD power supply control module of the POE interface conforming to the IEEE802.3af standard and the IEEE802.3at standard to realize the control of the power interface of the CPE. The CPE can also be compatible with an external power adapter as an external power supply of the CPE, and a standby power supply implementation mode is provided for users. The PD power supply control module realizes seamless switching from PSE power supply to external power adapter power supply, and does not influence the use performance of the CPE. Meanwhile, the PD power supply control module is arranged, so that the CPE is compatible with two power supply modes, namely a POE intermediate cross-connection method and a POE terminal cross-connection method, and the universality of the CPE is ensured. According to the CPE and the power supply control method thereof provided by the invention, not only the Ethernet interface modes of different standards are supported, but also the power supply is flexible and convenient, and the practicability is enhanced. The CPE and the power supply control method thereof improve the power supply selectivity in the CPE, reduce the CPE cost and facilitate the use of users.
Drawings
Fig. 1 is a schematic diagram of a CPE based on a conventional ethernet interface;
FIG. 2 is a schematic diagram of the CPE according to the invention;
FIG. 3 is a flow chart of a method of implementing power control by a CPE in accordance with the present invention;
fig. 4 is a schematic structural diagram of a CPE according to an embodiment of the ethernet interface of the present invention.
Detailed Description
Fig. 2 is a schematic diagram of a configuration structure of a CPE according to the present invention, and as shown in fig. 2, the CPE further includes a PD power supply control module in addition to a power supply module, an ethernet interface module, a processor module, a peripheral device interface module, and a wireless access module. Wherein,
the functions, roles, and manners of data control and transmission of the power supply module, the ethernet interface module, the processor module, the peripheral device interface module, and the wireless access module are the same as those of the CPE device based on the conventional ethernet interface, and will not be described in detail herein. The simple description is as follows: the processor module is a control module of the whole CPE and is used for controlling the CPE program command and transmitting and accessing the data signal; and the control and management of data and power signals are realized. Converting the Ethernet signal received from the Ethernet interface module into an MII interface signal according to a control command sent by the processor module, and placing the MII interface signal in a temporary storage area of the peripheral equipment interface module; when the conditions are met, the data signals placed in the temporary storage area are transmitted to the peripheral equipment interface module or the wireless access module according to the command of the processor module and are connected to corresponding equipment. Similarly, data signals received from the peripheral equipment interface module and the wireless access module can be transmitted to the Ethernet interface module in a reverse order mode; data signals between the peripheral device interface module and the wireless access module can also be transmitted mutually in a similar way.
In order to enable the CPE to obtain power from the POE network, the invention adds a PD power supply control module in the CPE of the traditional Ethernet interface.
The PD power supply control module is a core management part of the power supply control of the invention and is used for realizing the control and management of power transmission between the PSE and the CPE and ensuring the correctness of power supply of the power supply. And the PD power supply control module is used for switching a power supply accessed by the PSE (connected through the Ethernet interface module) or an external power adapter to a power supply module of the CPE, and reasonably distributing the power supply to other functional modules in the CPE after the power supply module processes and converts the power supply.
Furthermore, the CPE of the present invention may further include a battery module, configured to be charged by the power module during normal operation of the CPE, and supply power to the CPE when there is no power supply (abbreviated as external power supply) accessed by the POE network or the external power adapter.
As can be seen from fig. 2, the CPE of the present invention is compatible with the conventional ethernet interface, and the PD power supply control module of the POE interface conforming to the ieee802.3af standard and the ieee802.3at standard implements the power interface control of the CPE. The CPE can also be compatible with an external power adapter as an external power supply of the CPE, and a standby power supply implementation mode is provided for users. The PD power supply control module realizes seamless switching from PSE power supply to external power adapter power supply, and does not influence the use performance of the CPE. Meanwhile, the PD power supply control module is arranged, so that the CPE is compatible with two power supply modes, namely a POE intermediate cross-connection method and a POE terminal cross-connection method, and the universality of the CPE is ensured.
The working principle of the power supply in the CPE of the present invention shown in fig. 2 is as follows:
when no POE network exists, the external power adapter is directly adopted to supply power or the electric energy stored in the battery module is used for supplying power to the CPE through manual selection.
When the POE network is adopted, the CPE is connected to the POE network through manual selection, the PSE sends out a detection signal, whether the CPE is powered equipment in an IEEE802.3af standard or an IEEE802.3at standard is detected, and whether power is provided for the CPE is judged; if the power supply cannot be provided for the CPE according to the detection judgment, the power supply is not provided for the CPE; if it is determined through the detection that the power can be supplied to the CPE, the PSE again detects the power level of the CPE as a PD, thereby determining the level of power to be supplied to the CPE. Here, the method for detecting whether and what level of power can be provided to the CPE is well known to those skilled in the art and will not be described herein.
After determining that the power and the provided power level can be provided for the CPE, the PSE starts to supply power to the PD, the PD starts to work normally, and meanwhile, the power supply module charges the battery module according to the instruction of the processor module. When the battery module finishes charging, an instruction is sent to the processor module, and then the processor module controls the power supply module to stop charging the battery module.
In the normal work of the CPE, the PSE acquires the current PD information by detecting the accuracy, temperature compensation and other information of the characteristic resistor in the PD power supply control module in the working process, and the PSE is ensured not to cancel the power supply to the PD. Here, the specific detection method belongs to the technology known to those skilled in the art, and is not described here.
Further, if an external power supply supplies power to the CPE through the external power adapter in the POE power supply, the PD power supply control module seamlessly switches the power supply to the external power supply.
Fig. 3 is a flowchart of a method for implementing power control by CPE according to the present invention, as shown in fig. 3, including:
step 300: when a POE network is employed, the PSE detects the power class and determines that power can be provided to the CPE. The method for detecting whether the CPE can be provided with power and what power level is provided in this step is well known to those skilled in the art and will not be described herein.
When no POE network exists, the external power adapter is directly adopted to supply power or the electric energy stored in the battery module is used for supplying power to the CPE through manual selection.
Step 301: the PSE powers the CPE. In the step, in the normal work of the CPE, the PSE acquires the current PD information by detecting the accuracy, temperature compensation and other information of the characteristic resistor in the PD power supply control module in the working process, so that the PSE is ensured not to cancel the power supply to the PD. Here, the specific detection method belongs to the technology known to those skilled in the art, and is not described here.
Further, if a battery module is present in the CPE, this step also includes charging the battery module.
Step 302: judging whether an external power supply exists, if so, entering a step 303; otherwise, the procedure returns to step 301.
Step 303: an external power supply powers the CPE.
According to the CPE and the power supply control method thereof provided by the invention, not only the Ethernet interface modes of different standards are supported, but also the power supply is flexible and convenient, and the practicability is enhanced. The CPE and the power supply control method thereof improve the power supply selectivity in the CPE, reduce the CPE cost and facilitate the use of users.
The CPE of the present invention will be described in detail with reference to examples. Fig. 4 is a schematic structural diagram of an embodiment of a CPE according to the present invention, and as shown in fig. 4, the CPE based on a POE interface according to the present invention includes the following modules: an ethernet interface module, a PD power control module, a power module, a processor module, an ethernet data exchange chip, a peripheral module (such as VOIP, and/or LCD, and/or Camera, and/or Keypad, and/or touch screen, and/or bluetooth module), a USB interface (including a bridge chip), a storage module (such as DDR and/or FLASH), a WiFi module, a wireless access module, a memory card module (such as SD, and/or SDIO, and/or MMC, and/or T-FLASH memory card interface), and a battery module. In the CPE, the USB interface, the storage module, the WiFi module, the wireless access module, and the memory card module may all include, or may only include one or any combination of the USB interface, the storage module, the WiFi module, the wireless access module, and the memory card module.
As shown in fig. 4, the functions of the respective modules are as follows:
and the Ethernet interface module is mainly used for realizing the transmission and exchange functions of data between the PSE and the CPE and a power supply circuit. The ethernet interface module may be a single RJ45 interface with POE function, or two RJ45 interfaces with POE function. In order to simplify the circuit and save the equipment cost and the management cost, the ethernet interface module usually adopts an RJ45 interface with POE function for one port, and adopts a common RJ45 interface for the other port.
The PD power supply control module is a core management part of power supply control of the CPE and is used for realizing control and management of power transmission between the PSE and the CPE and ensuring the correctness of power supply.
And the power supply module is used for reasonably distributing the power supply provided by the PSE or the power adapter to other functional modules in the CPE.
And the processor module is mainly used for realizing the functions of processing and controlling data.
And the switching chip is mainly used for ensuring the correct data transmission between the CPE and the Ethernet.
The peripheral device interface module is mainly used for realizing peripheral device functions, such as LCD, touch screen, Camera, Keypad, Bluetooth, VOIP and the like.
And the USB interface is used for realizing the USB interface connection function of the CPE equipment and ensuring the universality of data connection. The USB interface may be a master device interface or a slave device interface.
The storage module provides programs and data space for the processor module, and the storage module is distributed and processed by the processor module.
And the WiFi module is mainly used for realizing signal transmission and exchange between the WiFi signals and the CPE.
And the wireless access module is mainly used for realizing the transmission function between wireless data and the CPE.
And the memory card module is mainly used for realizing the function of an external memory card of the CPE.
And the battery module is mainly used for storing electric energy so as to use CPE equipment when a POE network does not exist.
Further, the CPE shown in fig. 4 may further include an external power source, such as a dc power source, which is mainly used to ensure that when no POE network supplies power, the external power adapter supplies power to the CPE.
The CPE shown in fig. 4 operates in the following manner:
firstly, judging whether an Ethernet network to be used by the CPE is a POE network, if the Ethernet network is a common Ethernet network, directly using an external power supply (an external power adapter) for power supply through manual control, or using a battery module for power supply under the condition that the battery power in the CPE is sufficient;
when the POE network is used for supplying power, the PSE sends out a detection signal, the size of the resistance value of the characteristic resistor in the PD power supply control module of the CPE is detected through the Ethernet interface module, whether the CPE is powered equipment or not is judged, and therefore whether the equipment is powered or not is determined.
Then, the PSE determines the power consumption level information of the CPE by detecting the magnitude of a level resistance current preset by hardware in the PD power supply control module, and then provides the CPE with a corresponding level of electric power. Here, the magnitude of the gradation resistance has a direct correspondence with the overall power consumption of the CPE. The PD power control module provides a way for the CPE to use an external power supply for power.
When the PSE determines through detection that power can be supplied to the CPE, power is supplied to the CPE. In the working process of the CPE, the accuracy of the characteristic resistor and the temperature compensation parameter information in the PD power supply control module of the CPE are transmitted to the PSE through the Ethernet interface module so as to inform the PSE of the current working state of the CPE and ensure that the PSE continuously supplies power to the CPE.
And after the CPE starts to work normally, the power supply module charges the battery module according to the control command of the processor module. When the battery module finishes charging and sends an instruction to the processor module, the processor module sends a control command to stop the charging of the battery module by the power supply module. The battery module can provide power for the CPE when no POE network or external power supply supplies power, so that the normal operation of the CPE is ensured, or the normal operation of the CPE is in a low power consumption mode.
The transmission of the data stream in fig. 4 is: the data signals received from the Ethernet interface module are transmitted to the switching chip according to the instruction requirement of the processor module, processed into MII signals capable of being processed by the processor module, and temporarily stored in the storage module for use by other modules. For example, data received from the ethernet interface module is transmitted through the wireless access module, and the data temporarily stored in the storage module is converted into a signal mode that can be accepted by the wireless interface module through a corresponding bridge connection circuit according to the instruction requirement of the processor module, and then transmitted to the temporary storage area of the wireless interface module, and the signal is converted into a wireless signal by the wireless interface module and transmitted. The reverse data transfer process is opposite.
Similarly, data signals between the processor module, the switch chip, the peripheral device interface module, the USB interface, the WiFi module, and the memory card module may also be transmitted according to instructions of the processor module, and the specific implementation is easily known by those skilled in the art and will not be described in detail herein.
The invention adopts POE Ethernet to supply power, thus simplifying the power supply mode of the system. The power conversion adapter is only used as a standby power supply mode, so that the cost is saved; after the POE network is developed and matured, the external power adapter can be eliminated.
The method and the technology have higher universality, can be used for solving the power supply problem of the CPE aiming at wireless data CPE terminal products such as WiMAX, WCDMA, TD-SCDMA, CDMA, EVDO, GSM and the like which provide wireless transmission functions, and have wide application range and simple and easy operation.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.
Claims (11)
1. A customer premise equipment, includes power module, ethernet interface module, processor module, peripheral equipment interface module, wireless access module, its characterized in that still includes: a power supply control module of the power receiving end device PD,
and the PD power supply control module is used for switching a power supply accessed by the PSE or an external power adapter to a power supply module of the CPE of the customer premise equipment, and the power supply module processes and transforms the power supply and then redistributes the power supply to other functional modules in the CPE.
2. The customer premises equipment of claim 1, further comprising a battery module, configured to be charged by the power module during normal operation of the CPE, and configured to supply power to the CPE when there is no power accessed by the POE network or the external power adapter.
3. User-end device according to claim 1 or 2, wherein the PD powering control module is provided with a POE interface compliant with ieee802.3af standard and ieee802.3at standard.
4. The customer premises device of claim 1, further comprising a battery module;
and when the POE network does not exist, an external power adapter is adopted to supply power or the electric energy stored in the battery module is used for supplying power to the CPE.
5. The user end device of claim 1, wherein in the POE powering when using a POE network, the PD powering control module is further configured to switch the power supply to the external power adapter when detecting that the external power adapter is available.
6. The user end device of any one of claims 1, 2, 4, or 5, wherein the ethernet interface module is a single RJ45 interface with POE function; or,
two RJ45 interfaces with POE function; or,
one network port adopts an RJ45 interface with POE function, and the other network port adopts a common RJ45 interface.
7. The customer premises device of any one of claims 1, 2, 4 or 5, further comprising: a USB interface, and/or a memory module, and/or a WiFi module, and/or a memory card module.
8. A method for realizing power control of user end equipment is characterized by comprising the following steps:
when the POE network is adopted, the PSE detects the power level and determines that power can be provided for the CPE;
the PSE supplies power to the CPE, whether an external power supply exists is judged, and if yes, the external power supply is adopted to supply power to the CPE; otherwise, the PSE is continuously adopted to supply power to the CPE.
9. The method of claim 8, further comprising: and when the POE network does not exist, an external power adapter is adopted to supply power or a battery is used for supplying power to the CPE.
10. Method according to claim 8 or 9, wherein there is a battery module in the CPE, and wherein in powering the CPE the PSE further comprises: charging the battery module.
11. Method according to claim 8 or 9, characterized in that in powering the CPE by the PSE, the power supply is switched to an external power adapter if an external power adapter is detected.
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| CN200910223364A CN101710860A (en) | 2009-11-18 | 2009-11-18 | Customer premises equipment and method for realizing power control |
| PCT/CN2010/073228 WO2010148886A1 (en) | 2009-11-18 | 2010-05-25 | Customer premise equipment and method for realizing power control thereof |
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| CN200910223364A CN101710860A (en) | 2009-11-18 | 2009-11-18 | Customer premises equipment and method for realizing power control |
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| CN2687968Y (en) * | 2004-03-10 | 2005-03-23 | 华为技术有限公司 | Ethernet terminal device for realizing adaptive power supply |
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| CN101436786B (en) * | 2007-11-14 | 2011-02-09 | 环旭电子股份有限公司 | Power supply switching device and network appliance |
| CN101710860A (en) * | 2009-11-18 | 2010-05-19 | 中兴通讯股份有限公司 | Customer premises equipment and method for realizing power control |
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