KR20170120280A - Method for collecting wireless charging status information and apparatus and system therefor - Google Patents

Abstract

The present invention relates to a wireless charging status information collection method and apparatuses and systems therefor, and a method for collecting charging status information in a wireless power transmitter according to an embodiment of the present invention includes: Transmitting a receiver address message including information to a wireless power cloud service network, and receiving a transmitter control message including a charge indicator indicating whether to charge the identified receiver from the wireless power cloud service network; And initiating a power transfer to the receiver if the charging is accepted. Accordingly, the present invention is advantageous in that it can effectively collect charge state information of a wireless power receiver.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a wireless charging status information collection method,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to wireless charging technology, and more particularly, to a method and system for collecting wireless charging status information for a wireless charging receiving device in a cloud environment.

Recently, as the information and communication technology rapidly develops, a ubiquitous society based on information and communication technology is being made.

In order for information communication devices to be connected anytime and anywhere, sensors equipped with a computer chip having a communication function must be installed in all facilities of the society. Therefore, power supply problems of these devices and sensors are becoming a new challenge. In addition, mobile devices such as Bluetooth handsets and iPods, as well as mobile phones, have been rapidly increasing in number, and charging the battery has required users time and effort. As a way to solve this problem, wireless power transmission technology has recently attracted attention.

The wireless power transmission technology (wireless power transmission or wireless energy transfer) is a technology to transmit electric energy from the transmitter to the receiver wirelessly using the induction principle of the magnetic field. In the 1800s, electric motor or transformer Thereafter, a method of transmitting electric energy by radiating an electromagnetic wave such as a radio wave or a laser was tried. Our electric toothbrushes and some wireless shavers are actually charged with electromagnetic induction.

Up to now, energy transmission using radio can be roughly classified into electromagnetic induction, electromagnetic resonance, and RF transmission using short wavelength radio frequency.

In the electromagnetic induction method, when two coils are adjacent to each other and a current is supplied to one coil, a magnetic flux generated at this time causes an electromotive force to the other coils. This technique is rapidly commercialized centering on small- . The magnetic induction method has the disadvantage that it can transmit power of up to several hundred kilowatts (kW) and the efficiency is high, but the maximum transmission distance is 1 centimeter (cm) or less, so it is usually adjacent to the charger or the floor.

The electromagnetic resonance method is characterized by using an electric field or a magnetic field instead of using an electromagnetic wave or a current. The self-resonance method is advantageous in that it is safe to other electronic devices or human body since it is hardly influenced by the electromagnetic wave problem. On the other hand, it can be used only at a limited distance and space, and has a disadvantage that energy transfer efficiency is somewhat low.

Short wavelength wireless power transmission - simply, RF transmission - takes advantage of the fact that energy can be transmitted and received directly in radio wave form. This technology is a RF power transmission system using a rectenna. Rectena is a combination of an antenna and a rectifier, which means a device that converts RF power directly into direct current power. That is, the RF method is a technique of converting an AC radio wave into DC and using it. Recently, as the efficiency has improved, commercialization has been actively researched.

Wireless power transmission technology can be applied to various industries such as IT, railroad, automobile, home appliance industry as well as mobile.

Recently, a wireless charging network for providing various intelligent wireless charging services by configuring a wireless charging system composed of a wireless power transmitter and a wireless power receiver as a network has been actively studied. Accordingly, studies on communication protocols and interface specifications between the nodes connected to the wireless charging network are under way.

In order to effectively control and manage a network-connected wireless charging system, and to provide accurate billing and differentiated wireless charging services per user device, the wireless power service provider must be able to quickly and accurately collect the current status information of the user device.

It is an object of the present invention to provide a wireless charging status information collection method and apparatus and system therefor.

It is another object of the present invention to provide a method for reporting and collecting current charge status information in a cloud-based wireless recharge network.

It is another object of the present invention to provide a charging method based on charge state information in a cloud-based wireless charging network and an apparatus (s) therefor.

 It is still another object of the present invention to provide an effective access control method for an authentication failed receiver and an apparatus and system therefor.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

The present invention can provide a wireless charging status information collection method and devices and systems therefor.

The method of collecting charge state information in a wireless power transmitter according to an exemplary embodiment of the present invention includes transmitting a receiver address message including receiver identification information to a wireless power cloud service network when a receiver located in a charging area is identified, Receiving a transmitter control message from a power cloud service network, the transmitter control message including a charging indicator indicating whether to charge the identified receiver, and initiating power transmission to the receiver if the charging is accepted .

The method further includes receiving a charging completion message from the receiver indicating completion of charging and transmitting a receiver status message including status information indicating completion of charging to the wireless power cloud service network As shown in FIG.

In one example, the receiver identification information may include a receiver identifier for uniquely identifying a receiver in the wireless power cloud service network.

In another example, the receiver identification information may include a Medium Access Control (MAC) address assigned to the receiver.

In addition, the receiver address message may further include a receiver index for identifying a receiver connected in the transmitter.

The charging status information collection method may further include recording the start time of the power transmission as a charging start time and recording the time when the charging completion message is received as a charging end time.

Further, the charging start time and the charging end time may be further included in the receiver status message.

The method further includes calculating a charging time of the receiver by subtracting the charging start time from the charging end time, wherein the calculated charging time is further included in the receiver status message .

The method may further include receiving a receiver status message including status information indicating that the connection is released without charging when the connection with the receiver is terminated prior to completion of charging to the identified receiver, To the cloud service network.

The charging state information collecting method may further include retransmitting the receiver address message when the connection with the receiver is reestablished.

The charging status information collection method may further include receiving a charging completion message from the receiver, the charging completion message indicating completion of charging, and a receiver status message including status information indicating completion of charging the wireless power cloud service network As shown in FIG.

The transmitter control message may include a device index field for identifying a device to be controlled and an instruction field for identifying a control command for the device index.

Here, if the device index is 0, the device to be controlled means the transmitter, and if the device index is greater than 0, the device to be controlled may be a receiver corresponding to the device index.

In the case where the device to be controlled is a receiver, if the value of the command field is 0, the charge indicator indicates that the charge is not accepted, and if the value of the command field is 1, May have been accepted.

The charging status information collection method may further include transmitting to the wireless power cloud service network information about a time before the power transmission to the receiver is started and a load charging rate at the time when charging is completed or disconnected .

Further, a change amount of the load charge ratio is calculated on the basis of the information about the load charge ratio at a predetermined server connected to the wireless power cloud service network, and the charge can be performed based on the change amount.

The charging status information collection method may further include calculating an average received power level and a charging time corresponding to the identified receiver when the power transmission is started, and a step of, when charging to the identified receiver is completed or disconnected Calculating a power transmission amount by multiplying the calculated average received power by a charging time, and transmitting the power transmission amount to the wireless power cloud service network.

A method of collecting charge status information in a transmitter wirelessly coupled with a server connected to a wireless power cloud service network according to another embodiment of the present invention includes receiving, by a wireless power cloud server, Transmitting a receiver address message to the wireless power cloud server, the receiver address message including receiver identification information of a second receiver sensed during power transmission to the first receiver, and transmitting the receiver address message from the wireless power cloud server to the second receiver Receiving a transmitter control message indicating that charging has been refused due to authentication failure for the first receiver; registering receiver identification information of the second receiver in a blacklist; Transmits a control message to the second receiver It can include.

When the advertisement message including the receiver identification information registered in the black list is received, the advertisement message can be ignored.

A method for collecting charge state information in a server interworking with a wireless power transmitter through a wireless power cloud service network according to another embodiment of the present invention includes receiving a receiver address message including receiver identification information from the wireless power transmitter Transmitting a transmitter control message to the wireless power transmitter, the transmitter control message including a determination of authentication and charge acceptance for a receiver corresponding to the receiver identification information, and a charge indicator indicating whether to accept charge to the receiver; And receiving a receiver status message from the wireless power transmitter if charging for the receiver is accepted.

Here, the time at which the transmitter control message indicating that charging for the receiver is accepted may be recorded as the charging start time.

In addition, when the receiver status message is a first message indicating that the charging of the receiver is completed, a time point at which the first message is received may be recorded as a charging end time.

In addition, when the receiver status message is a second message indicating that the established connection with the receiver is canceled before the charging of the receiver is completed, the point in time at which the second message is received may be recorded as the charge suspend time .

In addition, when the receiver status message is a third message indicating that the connection with the disconnected receiver has been reset, the time point at which the third message is received may be recorded as a charge resume time.

Further, the charging time to the receiver may be calculated based on at least one of the charging start time, the charging end time, the charging temporary stop time, and the charging restart time.

The method further includes receiving a receiver charging status message from the wireless charging transmitter, wherein the receiver charging status message includes information about a load charging rate for the receiver, a power transfer amount for the receiver And information on the amount of power received by the receiver.

Yet another embodiment of the present invention can provide a computer-readable recording medium on which a computer-readable program for executing any one of the above-described methods for collecting charge state information is recorded.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And can be understood and understood.

Effects of the method and apparatus according to the present invention will be described as follows.

The present invention has the advantage of providing a wireless charging status information collection method and apparatus and system therefor.

The present invention also has the advantage of providing a method for reporting and collecting current charge status information in a cloud-based wireless charging network.

The invention also has the advantage of providing a charging method based on charge state information in a cloud-based wireless charging network and the device (s) therefor.

In addition, the present invention prevents an unauthorized receiver from being connected, thereby preventing an unnecessary processing load.

The effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description will be.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. It is to be understood, however, that the technical features of the present invention are not limited to the specific drawings, and the features disclosed in the drawings may be combined with each other to constitute a new embodiment.
1 is a block diagram illustrating a wireless charging network according to an exemplary embodiment of the present invention.
FIG. 2 shows a procedure of collecting charge state information of a receiver in a wireless charging network by a server according to an embodiment of the present invention.
FIG. 3 shows a procedure in which the charging status information of a receiver in a wireless charging network is collected by a server according to another embodiment of the present invention.
FIG. 4 shows a procedure of collecting charge state information of a receiver in a wireless charging network by a server according to another embodiment of the present invention.
5 is a diagram for explaining a structure of a cloud packet used in a wireless power cloud service network according to an embodiment of the present invention.
FIG. 6 shows a format of a receiver address message according to an embodiment of the present invention.
7 is a diagram illustrating a structure of a receiver status message according to an embodiment of the present invention.
8 is a diagram illustrating a structure of a transmitter control message according to an embodiment of the present invention.
9 is a flowchart illustrating a method of collecting receiver charge state information according to an embodiment of the present invention.
10 is a flowchart illustrating a method of collecting receiver charge state information according to another embodiment of the present invention.
11 is a flowchart illustrating a method of controlling access to a receiver in a wireless charging network according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an apparatus and various methods to which embodiments of the present invention are applied will be described in detail with reference to the drawings. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. In addition, although all of the components may be implemented as one independent hardware, some or all of the components may be selectively combined to perform a part or all of the functions in one or a plurality of hardware. As shown in FIG. The codes and code segments constituting the computer program may be easily deduced by those skilled in the art. Such a computer program can be stored in a computer-readable storage medium, readable and executed by a computer, thereby realizing an embodiment of the present invention. As the storage medium of the computer program, a magnetic recording medium, an optical recording medium, a carrier wave medium, or the like may be included.

In the description of the embodiment, in the case of being described as being formed on the "upper or lower", "before" or "after" of each component, (Lower) "and" front or rear "encompass both that the two components are in direct contact with each other or that one or more other components are disposed between the two components.

It is also to be understood that the terms such as " comprises, "" comprising," or "having ", as used herein, mean that a component can be implanted unless specifically stated to the contrary. But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected to or connected to the other component, It should be understood that an element may be "connected," "coupled," or "connected."

In the description of the embodiments, an apparatus for transmitting wireless power on a wireless charging system includes a wireless power transmitter, a wireless power transmitter, a wireless power transmitter, a wireless power transmitter, a transmitter, a transmitter, a transmitter, A wireless power transmission device, a wireless power transmitter, and the like are used in combination.

Also, for the sake of convenience of explanation, it is to be understood that a wireless power receiving apparatus, a wireless power receiving apparatus, a wireless power receiving apparatus, a wireless power receiving apparatus, a receiving terminal, a receiving side, a receiving apparatus, Etc. may be used in combination.

The wireless power transmitter according to the present invention may be configured as a pad type, a cradle type, an access point (AP) type, a small base type, a stand type, a ceiling embedded type, a wall type, The wireless power transmitter may transmit power to a plurality of wireless power receivers simultaneously or in a time-sharing manner.

The wireless power transmitter may comprise at least one wireless power transmission means.

In addition, the wireless power transmitter according to the present invention may be networked and interworked with another wireless power transmitter. As an example, the wireless power transmitter may be interworked using short range wireless communications such as Bluetooth. In another example, the wireless power transmitter may be interworked using wireless communication technologies such as Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE) / LTE-Advanced, Wi-Fi, A wireless power transmitter according to another embodiment of the present invention may be interworked through a wired network.

In the wireless power transmission system according to the present invention, various non-electric power transmission standards based on an electromagnetic induction system in which a magnetic field is generated in a coil of a power transmitting terminal and are charged using an electromagnetic induction principle in which electricity is induced in a receiving- . Here, the electromagnetic induction type wireless power transmission standard may include, but is not limited to, an electromagnetic induction wireless charging technique defined in a Wireless Power Consortium (WPC) or a Power Matters Alliance (PMA).

In another example, the wireless power transmission scheme may employ an electromagnetic resonance scheme in which a magnetic field generated by a transmission coil of a wireless power transmitter is tuned to a specific resonance frequency to transmit power to a nearby wireless power receiver . For example, the electromagnetic resonance method may include a resonance type wireless charging technique defined in Alliance for Wireless Power (A4WP), a wireless charging technology standard organization.

As another example, a wireless power transmission scheme may use an RF wireless power transmission scheme that transmits low power energy to an RF signal and transmits power to a remote wireless power receiver located at a remote location.

As another example of the present invention, the wireless power transmitter according to the present invention may be designed to support at least two or more wireless power transmission schemes among the electromagnetic induction method, the electromagnetic resonance method, and the RF wireless power transmission method.

In this case, the wireless power transmitter can transmit power in a wireless power transmission scheme that the connected wireless power receiver can support. For example, if the wireless power receiver supports multiple wireless power transmission schemes, the wireless power transmitter may select an optimal wireless power transmission scheme for the wireless power receiver and transmit power in the selected wireless power transmission scheme. In another example, the wireless power transmitter may adaptively determine the wireless power transmission scheme to use for the wireless power receiver based on the type of wireless power receiver, the power reception state, the power demanded, and so on.

In addition, the wireless power receiver according to an embodiment of the present invention may include at least one wireless power receiving means, and may simultaneously receive wireless power from two or more wireless power transmitters. Here, the wireless power receiving means may include at least one of the electromagnetic induction method, the electromagnetic resonance method, and the RF wireless power transmission method.

In addition, the wireless power receiver according to another embodiment of the present invention may select the optimal wireless power receiving means and receive power based on the measured reception sensitivity or power transmission efficiency, etc., per wireless power receiving means.

The wireless power receiver according to the present invention can be used in a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player) Such as an electric toothbrush, an electronic tag, a lighting device, a remote control, a fishing rod, and the like. However, the present invention is not limited thereto. If it is possible, it is enough. The wireless power receiver according to another embodiment of the present invention may be installed in a home appliance including a TV, a refrigerator, and a washing machine, a vehicle, an unmanned airplane, an air drone, a robot, and the like.

1 is a block diagram illustrating a wireless charging network according to an exemplary embodiment of the present invention.

Referring to FIG. 1, the wireless charging network 100 includes a wireless charging system, a wireless power cloud service network (WPCSN) 30, a manufacturer server 40 connected to a wireless power cloud service network 30, A wireless power service provider server 50, an advertisement server 60, and a billing server 70. [

The wireless charging system can be largely comprised of at least one transmitter for transmitting power wirelessly and at least one receiver for receiving power wirelessly.

As shown in Figure 1, the transmitter of the wireless charging system may be connected to a wireless power cloud service network 30 via gateways, e.g., 17, 18 and 23- or the gateway and second converter 26, So that various control signals and status information can be exchanged.

Referring to FIG. 1, a protocol used for communication between the fourth transmitter 21 and the second converter 26 includes a protocol used for communication between the second converter 26 and the third GW 23, May be different.

A receiver according to an embodiment of the present invention, for example, the second receiver 14 of FIG. 1, is connected to a wireless power cloud service network 30 (for example, To perform communication.

1, the fourth receiver 22 of FIG. 1 is connected to a wireless power cloud service network 30 (not shown) through the first converter 23 and the second cloud communication unit 24, To perform communication. Here, the first conversion unit 23 may protocol-convert the message received from the fourth receiver 22 and transmit it to the second cloud communication unit 24. That is, the first conversion unit 23 transmits the message received from the second receiver 22 to the second cloud communication unit 24 for communication connection between the receiver and the wireless power cloud service network 30 that can not directly interface with the cloud communication unit ) To be able to process the protocol.

The communication between the transmitter and the gateway can be made through the wired or wireless second layer communication. On the other hand, the communication between the gateway and the wireless power cloud service network 30 may be based on ethernet-based TCP / IP communication, but is not limited thereto.

If direct communication between the transmitter and the gateway is not possible, the communication between the fourth transmitter 21 and the third gateway 23, via the second conversion unit 26, as shown at 20 in FIG. 1 Lt; / RTI > For example, the communication between the fourth transmitter 21 and the second conversion unit 26 may be performed using a universal asynchronous receiver / transmitter (UART) communication, an I2C (Inter Integrated Circuit) communication, a SPI (Serial Peripheral Interface) Communication, CAN (Controller Area Network) communication, or the like can be used.

The wireless power service provider server 50 may remotely control a transmitter or a receiver connected to the wireless power cloud service network 30. [ For example, the wireless power service provider server 50 determines whether to accept the session setup between the specific transmitter and the specific receiver, and transmits a predetermined control signal according to the determination result to the wireless power cloud service network 30 and the gateway It may be transmitted to the corresponding transmitter.

In another example, the wireless power service provider server 50 may collect status and property information of the transmitter or (and) receiver via the wireless power cloud service network 30. [ At this time, the wireless power service provider server 50 controls the hardware of the corresponding transmitter to be reset based on the collected state and property information, or performs a charging disable or a charging disable ).

The manufacturer server 40 can maintain the information on the authenticated device in the database in accordance with the manufacturer-specific standard. For example, the manufacturer server 40 may be provided with a latest software version for devices satisfying standard specifications defined by a manufacturer's PMA (Power Matters Alliance). The manufacturer server 40 may collect software version information mounted on the transmitter or the receiver via the wireless power cloud service network 30. [ The manufacturer server 40 compares the latest software version information corresponding to the transmitter or the receiver with the installed software version information to determine whether or not the software update is necessary and perform the software update procedure according to the determination result .

The status information of the transmitter reported to the server through the wireless power cloud service network 30 includes overheat status information, overvoltage status information, overcurrent status information, the number of connectable receivers, the number of currently connected receivers, Information about the calculated charging efficiency for each receiver connected to the charging mode, information about the current power transmission state, for example, intensity information of the current output voltage, and the like, . ≪ / RTI >

In addition, the characteristic information of the transmitter reported to the server through the wireless power cloud service network 30 includes transmitter identification information for uniquely identifying the transmitter on the wireless charging network, software version information mounted on the transmitter, hardware version information, A power class information for identifying a transmittable power, information on a supportable charge mode, and information on a mounted protocol.

The state information of the receiver reported to the server through the wireless power cloud server 30 includes information on overheat state, overvoltage state information, overcurrent state information, charge state information, power reception state information, reception efficiency, Information on time, estimated remaining time to buffer, information on charging efficiency, information on dynamic power control, and information on requested power.

The characteristic information of the receiver reported to the server through the wireless power cloud service network 30 includes receiver identification information for uniquely identifying the receiver, receiver MAC address information, software version information and hardware version information mounted on the receiver, Category information, information on a charge mode that can be supported, and information on a mounted protocol.

The advertisement server 60 may transmit the advertisement message to the corresponding receiver through the wireless power cloud service network 30. [ At this time, the transmitted advertisement message may be transmitted to the corresponding receiver through the wireless power cloud service network 30 and the cloud communication units 19 and 24. However, the present invention is not limited to this, The advertisement message generated by the advertisement server 60 is transmitted to the second receiver 15 or the second receiver 15 via the wireless power cloud service network 30, the second gateway 18 and the third transmitter 13, 3 < / RTI > Of course, if direct communication between the transmitter and the gateway is not possible, the advertisement message generated by the advertisement server 60, as shown in the above reference numeral 20 of FIG. 1, may be transmitted to the wireless power cloud service network 30, And may be transmitted to the fourth receiver 22 through the gateway 23, the second conversion unit 26, and the fourth transmitter 21.

The advertisement server 60 can confirm whether the transmitted advertisement message has been normally received by the receiver or (and) read by the user on the device on which the receiver is mounted. If it is confirmed that the advertisement message has been normally received and / or read by the receiver, the advertisement server 60 may request the billing server 70 so that the wireless charge for the receiver is not discounted or imposed have.

The wireless power service provider server 50 according to an exemplary embodiment of the present invention includes information on a location installed by a transmitter, where information on location includes address information, store information, GPS information, a logical zone or a cell Cell) identification information.

The billing server 70 can perform billing for the receiver based on the information about the location where the transmitter is installed. Although it has been described in the above description that the charging is performed for each receiver, it is only one embodiment, and it should be noted that the charging server according to another embodiment of the present invention may perform charging in units of transmitters .

The wireless power service provider may connect its transmitter to the wireless power cloud service network 30 to provide a wireless charging service. As an example, a wireless power service provider may include, but is not limited to, a café, a public institution, an airport, a subway station, a bookstore, a convenience store, and the like.

The wireless power service provider server 50 may send a wireless charging coupon to the corresponding receiver via the wireless power cloud server 30, which may be free or discounted when the user purchases an item or uses a particular service.

When the use registration of the wireless charging coupon issued from the receiver is completed through the wireless power cloud service network 30, the billing server 70 transmits the wireless charging fee to the receiver in accordance with the type of the wireless charging coupon registered for use Can be discounted at a certain discount or free of charge.

A receiver according to an embodiment of the present invention may be a single mode receiver supporting either one of an electromagnetic induction type and an electromagnetic resonance type, but the present invention is not limited thereto. It should be noted that it may be a multimode receiver that supports both inductive and electromagnetic resonance modes.

The multimode receiver can dynamically switch from a running wireless charging mode to another wireless charging mode. In one example, the multimode receiver may switch the wireless charging mode based on charging efficiency. For example, when the charging efficiency of the electromagnetic resonance method falls below a predetermined reference value during the wireless charging by the electromagnetic resonance method, the wireless charging mode may be switched to the electromagnetic induction mode.

The multimode receiver according to an embodiment of the present invention can be divided into a first multimode receiver and a second multimode receiver according to whether or not it is possible to simultaneously receive wireless power through different wireless charging modes.

The first multimode receiver may receive power in at least one charging mode and supply the power required by the system when the at least one charging mode is active. In particular, the first multimode receiver may first activate the wireless charging mode to switch to the charging mode switch, i.e., switch to the operating mode, to ensure continuity of the wireless charging service, and then disable the existing wireless charging mode. That is, the first multimode receiver can control the charge mode to be switched by the "make before break" method.

Only one wireless charging mode at a time can be activated in the second multimode receiver. If power is simultaneously received in two wireless charging modes, the device on which the second multimode receiver is mounted may be damaged or broken. Therefore, the second multimode receiver is a wireless charging mode to be switched - hereinafter referred to as an alternate mode for convenience of explanation - a wireless charging mode that is currently operating before establishing a session with the transmitter - The user must terminate the preset session corresponding to the current operating mode. If the switching to the alternative mode fails, the second multimode receiver can perform the reconnection procedure using the current operation mode.

When the multimode receiver is detected to be an electromagnetic resonance carrier - for example, it may be a beacon signal defined in the A4WP standard, it may use out-of-band communication such as BLE (Bluetooth Low Energy) communication And can perform communication with the transmitter.

On the other hand, if only the multimode receiver is detected as an electromagnetic induction carrier (e.g., a ping signal defined in the PMA standard), the transmitter and in-band In-band communication can be performed.

The transmitter according to an exemplary embodiment of the present invention may be a single mode transmitter supporting either one of electromagnetic induction or electromagnetic resonance, but the present invention is not limited thereto. It should be noted that it may be a multi-mode transmitter that supports both inductive and electromagnetic resonance modes.

A multimode transmitter can provide wireless charging services to a multimode receiver as well as a single mode receiver. At this time, the multimode transmitter may transmit power to at least one receiver.

The wireless charging mode selection and switching procedure between the multi-mode transmitter and the multi-mode receiver can be transparent to the user without any user intervention.

The multimode transmitter can be divided into a first multimode transmitter and a second multimode transmitter depending on whether simultaneous power transmission to an electromagnetic resonance system or an electromagnetic induction system is possible.

The first multimode transmitter can simultaneously transmit power using electromagnetic resonance and electromagnetic induction.

The first multimode transmitter can transmit power to a plurality of receivers in an electromagnetic resonance manner while simultaneously transmitting power to one receiver in an electromagnetic induction manner.

The first multi-mode transmitter according to an embodiment performs time-division interleaving of a receiver sensing procedure defined in an electromagnetic resonance method and an electromagnetic induction method, and performs a session setting with a receiver sensed in a wireless charging mode, Procedures may be initiated. At this time, if the session establishment procedure is started, the receiver detection procedure may be immediately terminated. There is no particular restriction on the time and order of transmitting the receiver detection signal for each of the wireless charging modes in the electromagnetic resonance method for detecting the receiver and the electromagnetic induction method for time division interleaving. However, Should be defined to meet time requirements.

If the first multi-mode transmitter does not normally complete the session establishment procedure, the first multi-mode transmitter can resume the receiver detection procedure.

The first multimode transmitter may determine whether switching to the alternative mode is necessary if the detected receiver is identified as a multimodal receiver. As a result of the determination, if it is necessary to switch to the alternative mode, the first multi-mode transmitter performs a predetermined switching procedure to the alternative mode. On the other hand, if switching to the alternative mode is not required, the first multimode transmitter may maintain the current operating mode and provide a wireless charging service.

The first multimode transmitter is in a state of transmitting the wireless power in any one of the wireless charging modes - hereinafter referred to as a first wireless charging mode for convenience of explanation, and the second multimode receiver is in the second wireless charging mode Mode session with the second multimode receiver when it is confirmed that an attempt is made to establish a session of the second multimode receiver.

The second multimode transmitter may operate in any one of the wireless charging modes at any one time.

The second multimode transmitter can perform the receiver detection procedure according to predefined rules when there is no receiver being powered.

Here, the receiver sensing procedure may be defined such that the receiver sensing procedure defined in each of the electromagnetic resonance mode and the electromagnetic induction mode is time-division interleaving. Of course, each time-interleaved receiver detection procedure must be defined to meet the time requirements of the receiver detection procedure corresponding to the corresponding standard.

The second multimode transmitter according to an embodiment of the present invention may not perform the receiver sensing procedure for the other wireless charging mode while the wireless power is being transmitted in any one of the wireless charging modes. The second multimode transmitter may resume the receiver sensing procedure when wireless charging to the receiver is complete or when the wireless power transmission is terminated.

The second multimode transmitter may provide a predetermined user interface for enabling the user to identify the currently active wireless charging mode. For example, currently active wireless charging modes may be displayed using LEDs having different colors, but this is only one embodiment, and another embodiment of the present invention may be applied to a liquid crystal display The currently active wireless charging mode may be displayed via the display.

The first multi-mode transmitter and the second multi-mode transmitter may broadcast a predetermined transmitter multi-mode broadcast message to inform the receiver of the multi-mode capability. Here, the transmitter multi-mode broadcast message may include information for identifying a wireless charging mode that can be supported, information about a power rating for each wireless charging mode that can be supported, and the like.

The wireless power service provider according to the present invention should be capable of real-time checking the current charging state of the user device on which the receiver is mounted when providing the charging service through the wireless charging system.

At this time, the information about the current charging state of the user device may be transmitted to the wireless power cloud service network 30 through the transmitter and the gateway, but this is only one embodiment. In another example, Information may be transmitted to the wireless power cloud service network 30 through the cloud communication unit.

The wireless power service providing server 50 not only can control the operation of the receiver based on the information on the current charging state of the user device received through the wireless power cloud service network 30, It is possible to control the billing for the corresponding user device through interworking.

In one example, the current charge state information of the user device includes at least one of information about the current charge amount of the load, information about the current output power intensity of the load, information indicating that the charge is completed, information about the charge start time, . ≪ / RTI >

A transmitter according to an exemplary embodiment of the present invention can receive status information of a specific user device through a plurality of different messages through an in-band communication channel or an out-of-band communication channel established with a corresponding receiver. In this case, the transmitter can determine the current charging state of the user device using the received state information or calculate the current charging amount based on the received state information. Thereafter, the transmitter may transmit a predetermined charging status report message including the determined current charging status information, the calculated current charging amount, etc. to the wireless power cloud service network 30 through the gateway. Here, the charge status report message includes at least one of a receiver identifier for identifying which user device is the charge status information, a MAC address of the receiver, a transmitter identifier for identifying the transmitter that transmitted the charge status report message, or a transmitter MAC address . ≪ / RTI >

The multi-mode transmitter may be different in the message of receiving the charge state information of the receiver depending on the activated wireless charge mode. For example, in the A4WP standard of the electromagnetic resonance method, a PRU (Power Receiving Unit) Alert message for reporting to the transmitter that charging is completed is defined. On the other hand, an EOC (End of Charge) request message for reporting to the transmitter that charging is completed is defined in the electromagnetic induction PMA standard.

However, the transmitter connected to the wireless charging network according to an embodiment of the present invention can transmit the charging status information of the receiver to the wireless power cloud service network 30 through one standardized message regardless of the activated wireless charging mode have. For example, the transmitter may transmit charge status information for the receiver to the wireless power cloud service network 30 via a predetermined receiver charge status report message. Here, the receiver charge status report message includes a receiver identifier, a transmitter identifier, information for identifying the current charge amount of the load corresponding to the receiver identifier, information for identifying whether or not the charge corresponding to the receiver identifier is completed, Information and charge end time information.

Hereinafter, a method of collecting charge state information of a receiver on a wireless charging network according to a first embodiment of the present invention will be described in detail with reference to FIGS.

FIG. 2 shows a procedure of collecting charge state information of a receiver in a wireless charging network by a server according to an embodiment of the present invention.

Referring to FIG. 2, when the receiver 210 detects the receiver 210 through a predetermined receiver detection procedure, the transmitter 220 performs identification and configuration procedures to identify identification information for uniquely identifying the receiver, The identifiable receiver's static status information may be obtained from a receiver 210 sensed via a predetermined message (e.g., a PRU Static Parameter Characteristic message defined in the A4WP standard) (S251 through S252 ). In the identification and configuration procedure, the transmitter 220 may receive an advertisement message requesting wireless power service from the receiver 210 and may send a connection request message for session establishment to the corresponding receiver 210 in response to the advertisement message. Lt; / RTI >

Here, the identification information may be an ID that uniquely identifies the receiver on the wireless charging network, but may not be limited thereto, and may be a MAC address allocated to the receiver.

In one example, the static state information may include information about standard version information applied, hardware and software version information on the receiver, receiver category, receiver capability information - e.g., information about the preferred power control algorithm, Information about whether or not adaptive power distribution is supported, information for identifying whether or not charge completion can be supported in a connected state (Connected Mode), and various power intensity reference values for power control and state transition have.

The transmitter 220 may send a receiver address message to the gateway that includes the receiver identifier or the receiver MAC address. In this case, the receiver address message may be communicated to the wireless power service provider server 240 via the wireless power cloud service network 230 (S255).

The wireless power service provider server 240 may determine whether to authenticate and charge the user device or receiver corresponding to the receiver identifier or the receiver MAC address (S254).

If it is determined that the user device or receiver has been successfully authenticated and provides a charging service, the wireless power service provider server 240 may send a transmitter control message with the charging indicator set to 1 to the transmitter 220 (S255). Here, if the charge indicator is 1, it means that the charge for the receiver has been accepted, and if the charge indicator is 0, it means that the charge for the receiver has been rejected. At this time, the wireless power service provider server 240 may record the transmission time of the transmitter control message as the charging start time (S256).

If the charge indicator included in the received transmitter control message corresponds to the charge activation command, the transmitter 220 can start power transmission to the receiver and transition to the power transmission state (S257). At this time, the transmitter 220 may determine the acceptance, acceptance condition, rejection reason, and acceptance or rejection of the power service request (e.g., the power service request may be received by the transmitter 220 via the advertisement message) To the receiver 210, a receiver control message including an acceptance information field for the receiver.

As an example, the acceptance information field may have a length of 1 byte and may be defined as shown in Table 1 below, but is not limited thereto. The contents of the following Table 1 are merely examples, and the contents of some of the modifications or deletions belong to the scope of the present invention.

When the charging of the load is completed, the receiver 210 may transmit a predetermined charge completion message to the transmitter 220 (S258). For example, when the receiver 210 performs charging in an electromagnetic induction manner, the charge completion message may be an End Of Charge (EoC) message defined in the PMA standard, but is not limited thereto. In another example, if the receiver 210 performs the charging in an electromagnetic induction manner, the charge completion message may be a PRU Dynamic Parameter Characteristic message defined in the A4WP standard or a PRU Alert Characteristic message But is not limited thereto. The receiver dynamic parameter characteristic message and the receiver alarm characteristic message include a 1 byte long PRU Alert field. Each bit in the PRU Alert field can be used to identify events such as overvoltage, overcurrent, overtemperature, charge completion and wired charger detection.

Upon receipt of the charging completion message, the transmitter 220 transmits a predetermined receiver status message indicating that charging of the receiver 210 is completed to the wireless power service provider server 240 through the wireless power cloud service network 230 (S259).

When the wireless power service provider server 240 receives the receiver status message indicating completion of the charging, the wireless power service provider server 240 may record the reception status message as the charging completion time (S260).

Thereafter, the charge server coupled with the wireless power service provider server 240 or the wireless power service provider server 240 calculates the total charge time using the charge start time and charge type time recorded in steps 256 and 260 And calculate a charge rate for the receiver based on the calculated total charge time.

FIG. 3 shows a procedure in which the charging status information of a receiver in a wireless charging network is collected by a server according to another embodiment of the present invention.

In the description of FIG. 2, the wireless power service provider server 340 records charging start time and charging end time. However, this is only one embodiment, As shown in FIG. 3, when the transmitter 320 receives the transmitter control message set to 1 from the wireless power service provider server 340 and the transmission of power to the receiver is started, have. Thereafter, when the charging completion message is received from the receiver 310 during wireless charging, the transmitter 320 may record the charging completion time as the charging completion time (S356 to S359).

Then, the transmitter 320 generates a predetermined receiver status message including the status information indicating that the charging of the receiver 310 is completed and the recorded charging start time and the charging end time, and transmits it to the wireless power cloud service network 330 (S360). In one example, the transmitted receiver status message may be communicated to the wireless power service provider server 340 via the wireless power cloud service network 330, but this is but one embodiment and another embodiment of the present invention And may be transmitted to the charging server 70 of FIG.

The description of steps 351 to 354 of FIG. 3 is replaced with the description of steps 251 to 254 of FIG.

FIG. 4 shows a procedure of collecting charge state information of a receiver in a wireless charging network by a server according to another embodiment of the present invention.

The steps 451 to 457 of FIG. 4 are the same as the steps 251 to 257 of FIG. 2, and therefore, the description of FIG.

Referring to FIG. 4, the transmitter 420 can recognize that the connection is released in a power transfer state in which power is transmitted to the connected receiver 410 to charge the load (S458). In this case, the transmitter 420 transmits a predetermined receiver status message including status information indicating that the connection is released in a state where charging is not completed to the wireless power service provider server 440 connected to the wireless power cloud service network 430 (S459).

When receiving a receiver status message indicating that the connection is canceled in a state where the charging is not completed, the wireless power service provider server 440 may record the time when the receiver status message is received as the charging suspend time (S460) .

Thereafter, when the connection between the transmitter 420 and the receiver 410 is reset through a predetermined connection reset procedure, the transmitter 420 transmits a receiver address message including the receiver identifier or the MAC address corresponding to the receiver whose connection is reset To the wireless power service provider server 440 connected to the wireless power cloud service network 430 (S462).

The wireless power service provider server 440 may record the time when the receiver address message is received as the charge resume time (S463).

The transmitter 420 may transmit a receiver status message to the wireless power service provider server 440 connected to the wireless power cloud service network 430 indicating that the charging is complete when the charging completion message is received from the receiver 410 S465).

The wireless power service provider server 440 may record the time when the receiver status message indicating that charging is completed, as the charging completion time (S466).

Thereafter, the wireless power service provider server 440 or the billing server 70 of FIG. 1 calculates the total charge corresponding to the receiver based on the time information recorded in steps 456, 460, 463, Calculate the time, and generate billing data based on the total charge time. For example, when the recorded time information is the charge start time t1, the charge suspend time t2, the charge resume time t3, and the charge end time t4, the total charge time T_total is (t4-t1 ) - (t3-t2).

5 is a diagram for explaining a structure of a cloud packet used in a wireless power cloud service network according to an embodiment of the present invention.

Referring to FIG. 5, the cloud packet 500 may be divided into a header, a payload, and a tail.

The header includes a source information field 501 for identifying a sender of the corresponding cloud packet, a destination information field 502 for identifying a destination to which the cloud packet is to be received, and a type of a message included in the corresponding cloud packet And a message length field 504 for identifying the length of the payload field.

For example, when the cloud packet is a packet transmitted from the transmitter to the server connected to the wireless power cloud service network, the source information 501 includes the MAC address information allocated to the transmitter and the IP address information allocated to the gateway to which the transmitter is connected And the IP address information allocated to the corresponding server may be recorded in the destination information 502.

In another example, when the cloud packet is a packet transmitted from the server connected to the wireless power cloud service network to the transmitter, the IP address information allocated to the server is recorded in the source information 501, And the IP address information allocated to the gateway to which the corresponding transmitter is connected can be recorded.

The tail may be recorded with an error correcting code for checking the integrity of the data included in the payload, for example, a CRC (Cyclic Redundancy Check) code.

The payload 505 can be transmitted by recording the data generated in the transmitter. The generated data can be determined according to the message type. The message type and data may include data corresponding to the examples of FIGS. 6 to 8 described later.

6 shows a format of a receiver address message according to an embodiment of the present invention.

6, the receiver address message includes a receiver index (Rx Index, 601) field having a length of 2 bytes and a receiver identifier (RxID, ID) having a length of 6 bytes for uniquely identifying the receiver, 602).

6, the receiver address message includes a receiver index (Rx Index) field having a length of 2 bytes and a receiver MAC having a 6-byte length in which a MAC address allocated to the receiver is recorded Address 604, as shown in FIG.

7 is a diagram illustrating a structure of a receiver status message according to an embodiment of the present invention.

Referring to reference numeral 7a in FIG. 7, the receiver status message includes a 2-byte length Rx Index field 701 and a 1-byte length field indicating the current state of the receiver corresponding to the receiver index 701 (Status, 702) field.

As an example, the state 702 field may be defined as shown in the state definition table of reference numeral 7b, but this is only an example, and a new state may be additionally defined or some defined state may be deleted or changed It should be noted that The type of status information may include at least one of an idle state, a disconnection state without charging completion, a disconnection state according to completion of charging, a charging completion state, a charging state, and a charging completion state in the connection mode.

8 is a diagram illustrating a structure of a transmitter control message according to an embodiment of the present invention.

The transmitter control message may be generated by the servers connected to the wireless power cloud service network as a control message transmitted to the transmitter via the wireless power cloud service network.

8, the transmitter control message includes a device index (801) field having a length of 2 bytes and a command (802) field having a length of 1 byte for identifying a device to be controlled .

For example, with reference to reference numeral 8b, it should be noted that the value of the device index 801 must be set to 0x0000 in order to control the transmitter. A value other than 0 may be set in the device index 801 in order to identify the control target receiver in the transmitter.

For example, referring to reference numeral 8c, a transmitter control message in which the value of the device index 801 is 0x0000 and the value of the command 802 is set to 0x00 may be a control command for resetting the corresponding transmitter.

In another example, referring to reference numeral 8c, a transmitter control message in which the value of the device index 801 has a specific receiver index value and the value of the command 802 is set to 0x00 is transmitted to a receiver corresponding to the receiver index value, And may be an instruction to control the transmitter to be activated.

As another example, referring to reference numeral 8c, a transmitter control message in which the value of the device index 801 has a specific receiver index value and the value of the command 802 is set to 0x01, May be an instruction to control the transmitter to be deactivated.

9 is a flowchart illustrating a method of collecting receiver charge state information according to an embodiment of the present invention.

Steps 951 to 953 shown in FIG. 9 are replaced with the description of steps 251 to 253 of FIG.

9, the transmitter 920 calculates the charge rate of the load to which the receiver 910 is connected based on the receiver state information collected in the identification and configuration procedure (e.g., it may be the receiver static state information) .

For example, the load charge ratio may be calculated based on the intensity of the output voltage and current of the load, but the present invention is not limited thereto, and the receiver 910 according to another embodiment of the present invention measures the charge ratio of the load, Information about the measured load charge ratio may be explicitly transmitted to the transmitter 920 through a predetermined message. The wireless power service provider server can determine the amount of charge according to the charge amount of the received load.

The manner in which the transmitter 920 determines the load charging rate may vary depending on the wireless charging mode selected between the receiver 910 and the transmitter 920. Or may be adaptively determined according to the identified wireless charging mode.

For example, a receiver supporting an electromagnetic induction wireless charging standard such as WPC may map to a current charging rate of 0 to 255 through a Charging Status Packet having a length of 1 byte and transmit the same to a transmitter. On the other hand, the wireless charging standard of the electromagnetic resonance type such as A4WP does not explicitly convey information about the charging ratio of the load from the receiver to the transmitter. Therefore, the transmitter connected to the receiver using the electromagnetic resonance method defined in the A4WP standard can calculate the charging ratio of the load using the dynamic parameter characteristic packet received periodically. In one example, the dynamic parameter characteristic packet includes the output voltage Vout of the load and the intensity value of the output current Iout. The transmitter calculates the output power Pout of the load by the product of the output voltage Vout and the output current Iout and compares the calculated output power Pout with the intensity of the maximum output power of the load, Can be calculated.

The transmitter 920 may send a predetermined receiver charging status message containing information about the load charging rate to the wireless power service provider server 940 connected to the wireless power cloud service network 930 (S954).

The wireless power service provider server 940 performs a predetermined authentication procedure for the corresponding receiver 910 based on at least one information included in the receiver address message and the receiver charging status message and transmits a charging service to the receiver 910 (S954). ≪ / RTI >

If the authentication succeeds and the charge is accepted, the wireless power service provider server 940 may transmit a transmitter control message with the charge indicator set to 1 to the transmitter 920 (S955). The wireless power service provider server 940 may record the time at which the transmitter control message is transmitted as the charge start time (S956). The charge start time recording in this embodiment is one example and can be omitted.

If the charge indicator indicates charge acceptance, the transmitter 920 may transmit a receiver control message including predetermined acceptance information indicating that the charge request has been accepted from the server to the receiver 910 and then initiate power transfer (S957 ). Here, the receiver control message may be transmitted when the session between the transmitter 920 and the receiver 910 is set by an electromagnetic induction method.

If the session between the transmitter 920 and the receiver 910 is set by electromagnetic induction, the transmitter 920 may initiate a power transfer and transition to a power transfer state without transmitting a separate receiver control message.

The transmitter 920 may transmit a receiver status message to the wireless power service provider server 940 indicating that charging of the receiver 910 has been completed (S959).

The transmitter 920 may send a receiver charging status message to the wireless power service provider server 940 that includes information about the load charge ratio (S960).

It should be noted that step 959 is optional in this embodiment and may not necessarily be a procedure to be included.

If the transmitter 920 does not receive a charge completion message in the power transmission state and the session connection with the receiver 910 is canceled, the receiver state message of step 959 is not transmitted, and step 960 may be performed have. In step 960, the load charge ratio may be another type of battery charge amount information, and the charge ratio is an example.

In addition to the above embodiments, various information such as the measured power W, power / hour Watt / h, and delta power amount (charge power difference) can be processed and transmitted.

If any one of the receiver status message and the receiver charging status message is received, the wireless power service provider server 940 may record the reception end time of the corresponding message as the charging end time (S961).

 The wireless power service provider server 940 or the charging server 70 of FIG. 1 may be configured to perform load charging (or charging) based on the information about the load charging rate received in step 954 and the information about the load charging rate received in step 960, The rate of change of the rate can be calculated and the billing for the receiver 910 can be performed based on the calculated amount of change (S962).

10 is a flowchart illustrating a method of collecting receiver charge state information according to another embodiment of the present invention. Also in this embodiment, the recording of the charging start time is one embodiment, and can be omitted.

The steps 1051 to 1056 of FIG. 10 are replaced with the description of steps 351 to 357 of FIG.

Referring to FIG. 10, the transmitter 1020 may measure the average transmitted power to the receiver 1010 in the power transmission state (S 1058). In another embodiment of the present invention, when the number of receivers 1010 connected to the transmitter 1020 in a specific wireless charging mode is plural, it is possible to collect the received power intensity information for each receiver 1010. The strength of the average received power for each receiver may be calculated based on the collected received power intensity information.

When the charging completion message is received from the receiver 1010, the transmitter 1020 may record the time when the charging completion message is received as the charging completion time. A receiver status message indicating that charging of the receiver 1010 is completed may be transmitted to the wireless power service providing server 1040 connected to the wireless power cloud service network 1030 (S1061). The transmitter 1020 may send a receiver charging status message to the wireless power service provider server 1040 that includes information regarding the amount of power transmission. Here, the amount of power transmission is the time elapsed from the start of charging to the completion of charging (hereinafter referred to as charging time for convenience of explanation), the intensity of the average transmission power at the transmitter during the charging time, Can be calculated as a product of the strength.

The wireless power service provider server 1040 may perform billing for the receiver 1010 based on information about the received power transmission amount (S1063).

In the description of FIG. 10, the transmitter 1020 calculates the power transmission amount by multiplying the charging time to the receiver 1010 by the average reception power intensity during the charging time, and provides the power transmission amount to the wireless power service provider server 1040 The transmitter 1020 according to another embodiment of the present invention transmits a receiver charging status message including charging start time information, charging completion time information and average receiving power intensity information To the wireless power service provider server 1040. And may perform billing for the receiver based on a receiver charging status message received at the wireless power service provider server 1040 or a separate charging server.

11 is a flowchart illustrating a method of controlling access to a receiver in a wireless charging network according to an embodiment of the present invention.

11 is a view for explaining a method for effectively blocking connection of a second receiver failed authentication in a state in which a transmitter transmits power to a first authenticated first receiver.

Referring to FIG. 11, the transmitter 1130 can perform identification and configuration procedures when it detects that a new second receiver is located in the charging area while transmitting power to the first authenticated first receiver 1120 (S1161 To S1163).

The transmitter 1130 may transmit a receiver address message including the receiver identifier or receiver MAC address corresponding to the second receiver 1110 to the wireless power service provider server 1150 (S1164).

 The transmitter 1130 may transmit a receiver charging status message to the wireless power service provider server 1150 that includes information regarding the load charging rate corresponding to the second receiver 1110 (S1165). The information on the load charge ratio may be transmitted after the authentication is completed.

The wireless power service provider server 1150 may determine whether to authenticate and charge the second receiver 1110 (S1167).

If the wireless power service provider server 1150 fails to authenticate the second receiver 1110, the wireless power service provider server 1150 may transmit a transmitter control message with the charge indicator set to 0 to the transmitter 1130 (S1168). Here, if the value of the charge indicator is 0, it may mean that the charge for the second receiver 1110 is not accepted.

The transmitter 1130 may transmit a receiver control message to the second receiver 1110 indicating that the charge service request has been rejected by the server connected to the wireless power cloud service network (S1169).

Thereafter, the transmitter 1130 may transmit a generic access profile (GAP) termination message to the second receiver 1110 to release the established session with the second receiver 1110 (S1170).

At this time, the transmitter 1130 transmits the information about the second receiver 1110 for which the charge service request is rejected (e.g., it may be a receiver identifier or a receiver MAC address corresponding to the second receiver 1110) (S1171).

The second receiver 1110 may transmit the advertisement message to the transmitter 1130 in the power transmission state and try to reconnect (S1173).

However, the transmitter 1130 may ignore the advertisement message received from the blacklisted receiver (1173). For example, the information on the blacklisted receivers may be kept blacklisted for a certain period of time and then deleted. In another example of the present invention, the number of receivers that can be registered in the black list corresponding to the transmitter may be limited. If the number of receivers registered in the black list exceeds a predetermined threshold value, information on the earliest registered receiver may be deleted from the black list.

11, the transmitter according to the present invention has an advantage of minimizing the load of the wireless charging network by blocking the unnecessary authentication procedure for the receiver registered in the black list.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

The method according to the above-described embodiments may be implemented as a program to be executed by a computer and stored in a computer-readable recording medium. Examples of the computer-readable recording medium include a ROM, a RAM, a CD- , A floppy disk, an optical data storage device, and the like, and may also be implemented in the form of a carrier wave (for example, transmission over the Internet).

The computer readable recording medium may be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner. And, functional program, code, and code segments for implementing the above-described method can be easily inferred by programmers in the technical field to which the embodiment belongs.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

Claims (26)

A method for collecting charge state information in a transmitter that transmits power wirelessly,
Transmitting a receiver address message including receiver identification information to a wireless power cloud service network if a receiver located in the charging area is identified;
Receiving a transmitter control message including a charging indicator indicating whether to charge the identified receiver from the wireless power cloud service network; And
Initiating power transfer to the receiver if the charge is accepted,
Wherein the charge state information collection method comprises: The method according to claim 1,
Receiving a charge completion message from the receiver indicating completion of charging; And
Transmitting a receiver status message including status information indicating completion of the charging to the wireless power cloud service network
Further comprising the steps of: The method according to claim 1,
The receiver identification information
And a receiver identifier for uniquely identifying a receiver in the wireless power cloud service network. The method according to claim 1,
The receiver identification information
And a Medium Access Control (MAC) address assigned to the receiver. The method according to claim 1,
Wherein the receiver address message further comprises a receiver index for identifying a receiver connected in the transmitter. 3. The method of claim 2,
Recording the start time of the power transmission as a charge start time; And
Recording the time when the charge completion message is received as the charge end time
Further comprising the steps of: The method according to claim 6,
Wherein the charging start time and the charging end time are further included in the receiver status message. The method according to claim 6,
Further comprising calculating the charge time to the receiver by subtracting the charge start time from the charge end time, wherein the calculated charge time is further included in the receiver status message. The method according to claim 1,
And transmitting to the wireless power cloud service network a receiver status message including status information indicating that the connection is released without charging when the connection to the receiver is terminated before charging to the identified receiver is completed The method comprising: 10. The method of claim 9,
Further comprising retransmitting the receiver address message when the connection with the receiver is reestablished. 11. The method of claim 10,
Receiving a charge completion message from the receiver whose connection has been reset; And
Transmitting a receiver status message including status information indicating completion of the charging to the wireless power cloud service network
Further comprising the steps of: The method according to claim 1,
The transmitter control message
A device index for identifying a device to be controlled; And
A command field for identifying a control command for the device index;
Wherein the charge state information collection method comprises: The method according to claim 1,
Wherein the control target device means the transmitter if the device index is 0 and the device to be controlled corresponds to the device index if the device index is greater than 0. 14. The method of claim 13,
When the device to be controlled is a receiver,
If the value of the command field is 0, the charge indicator indicates that the charge is not accepted, and if the value of the command field is 1, the charge indicator indicates that the charge has been accepted. . The method according to claim 1,
Further comprising transmitting to the wireless power cloud service network information about a load charge ratio at a time prior to the start of the power transmission to the receiver and at the time the charge is completed or disconnected, . 16. The method of claim 15,
Wherein a change amount of a load charge ratio is calculated based on information on the load charge ratio at a predetermined server connected to the wireless power cloud service network, and charging is performed based on the change amount. The method according to claim 1,
When the power transmission is started, calculating an intensity of the average received power corresponding to the identified receiver and a charging time;
Calculating a power transmission amount by multiplying the calculated average received power by the charging time when charging to the identified receiver is completed or disconnected; And
And transmitting the amount of power to the wireless power cloud service network. A receiver access control method in a transmitter interworking with a wireless power cloud server,
Transmitting power to a first receiver authenticated by the wireless power cloud server;
Transmitting a receiver address message including receiver identification information of a second receiver sensed during power transmission to the first receiver to the wireless power cloud server;
Receiving a transmitter control message from the wireless power cloud server indicating that charging has been refused due to authentication failure for the second receiver;
Registering the receiver identification information of the second receiver in a black list; And
Transmitting to the second receiver a receiver control message indicating that charging has been rejected according to the wireless power cloud server authentication failure
And a receiver connection control method. 19. The method of claim 18,
And when the advertisement message including the receiver identification information registered in the black list is received, the advertisement message is ignored. A method for collecting charge status information in a server interworking with a wireless power transmitter through a wireless power cloud service network,
Receiving a receiver address message from the wireless power transmitter including receiver identification information;
Determining authentication and charge acceptance for the receiver corresponding to the receiver identification information;
Transmitting to the wireless power transmitter a transmitter control message including a charging indicator indicating whether to charge the receiver; And
Receiving a receiver status message from the wireless power transmitter if charging for the receiver is accepted,
Wherein the charge state information collection method comprises: 21. The method of claim 20,
Wherein a time at which the transmitter control message indicating that charging of the receiver is accepted is recorded as a charging start time. 22. The method of claim 21,
The receiver status message
Wherein the time when the first message is received is recorded as a charge end time when the first message indicating that charging of the receiver is completed is recorded. 23. The method of claim 22,
The receiver status message
Wherein the time point at which the second message is received is recorded as a charge time-out time if the second message indicates that the established connection with the receiver is canceled before the charging of the receiver is completed. 24. The method of claim 23,
The receiver status message
And when the third message indicates that the connection with the disconnected receiver is re-established, a time point at which the third message is received is recorded as a charge resume time. 25. The method of claim 24,
The charge time to the receiver is calculated based on at least one of the charge start time, the charge end time, the charge suspend time, and the charge resume time. A computer-readable recording medium on which a computer-readable program for executing the method according to any one of claims 1 to 25 is recorded.

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