





무선 충전 방법 및 장치에 관한 것으로써, 특히 무선 충전을 진행하는 과정에서의 통신 기술에 관한 것이다.The present invention relates to a wireless charging method and apparatus, and more particularly to a communication technique in a wireless charging process.
도 1은 일반적인 다중 무선 전력 전송 시스템의 개념도이다. 다중 무선 전력 전송 시스템은 무선 전력 수신 장치(1)와 적어도 하나의 무선 전력 전송 장치(5-1, 5-2, 5-3, 5-4)를 포함하게 되며, 무선 전력 수신 장치(1)는 상기 적어도 하나의 무선 전력 전송 장치(5-1, 5-2, 5-3, 5-4)로부터 무선 전력을 수신할 수 있도록 구성된다.1 is a conceptual diagram of a general multi-radio power transmission system. The multiple wireless power transmission system comprises a wireless
이와 같은 다중 무선 전력 전송 시스템을 구현하기 위해서는, 상기 무선 전력 수신 장치(1)는 무선 전력을 수신할 상기 적어도 하나의 무선 전력 전송 장치(5-1, 5-2, 5-3, 5-4)를 선택하는 동작과, 무선 전력 전송의 제어 동작이 필수적으로 요구된다. 이와 같이, 무선 전력 전송 장치의 선택 동작과, 무선 전력 전송의 제어 동작의 수행은, 상기 무선 전력 수신 장치(1)와 무선 전력 전송 장치(5-1, 5-2, 5-3, 5-4) 사이의 통신을 통해 이루어지고 있다.In order to implement such a multi-radio power transmission system, the radio
본 발명은 전술한 바를 고려하여 안출된 것으로써, 다중 무선 전력 전송 시스템 환경에 포함된 무선 전력 수신 장치가 복수의 무선 전력 전송 장치 사이의 통신을 빠르고 효과적으로 수행할 수 있는 방법 및 장치를 제공하는데 그 목적이 있다.SUMMARY OF THE INVENTION The present invention has been made in view of the foregoing, and provides a method and apparatus by which a wireless power receiving apparatus included in a multi-wireless power transmission system environment can perform communication between a plurality of wireless power transmission apparatuses quickly and effectively, There is a purpose.
본 발명의 일 측면에 따른 무선 전력 전송장치 및 무선 전력 수신장치 사이의 통신 방법은, 상기 무선 전력 전송장치가 제공하는 무선전력이 상기 무선 전력 수신장치에 인가되는 것을 감지하는 부하 감지 과정과, 상기 무선 전력 전송장치가, 상기 무선 전력 수신장치와의 연결을 설정하기 위해 미리 정해진 제1주파수를 갖는 공통채널을 연결하는 과정과, 상기 공통채널을 사용하여, 상기 무선 전력 수신장치와 통신을 위한 최적의 조건을 갖추며, 미리 정해진 제2주파수를 갖는 선택채널을 결정하는 과정과, 상기 결정된 선택채널을 연결하는 과정과, 상기 선택채널을 통해 무선 전력 수신장치와의 데이터 송수신을 진행하는 과정을 포함한다.A method of communication between a wireless power transmission apparatus and a wireless power reception apparatus according to an aspect of the present invention includes a load sensing process for sensing that wireless power provided by the wireless power transmission apparatus is applied to the wireless power reception apparatus, The method comprising: connecting a common channel having a predetermined first frequency to establish a connection with the wireless power receiving apparatus; and transmitting, by using the common channel, , Determining a selected channel having a predetermined second frequency, connecting the determined selected channel, and transmitting and receiving data with the wireless power receiving apparatus through the selected channel .
본 발명의 다른 측면에 따른 무선 전력 전송장치 및 무선 전력 수신장치 사이의 통신 방법은, 상기 무선 전력 전송장치로부터 무선전력을 공급받는 과정과, 상기 무선 전력 전송장치와의 연결을 설정하기 위해 미리 정해진 제1주파수를 갖는 공통채널을 설정하는 과정과, 상기 공통채널을 사용하여, 상기 무선 전력 전송장치와 통신을 위한 최적의 조건을 갖추며, 미리 정해진 제2주파수를 갖는 선택채널을 결정하는 과정과, 상기 결정된 선택채널을 설정하는 과정과, 상기 선택채널을 통해 무선 전력 전송장치와의 데이터 송수신을 진행하는 과정을 포함한다.According to another aspect of the present invention, there is provided a method of communicating between a wireless power transmission apparatus and a wireless power receiving apparatus, including: receiving wireless power from the wireless power transmission apparatus; The method comprising the steps of: setting a common channel having a first frequency; determining a selected channel having an optimal condition for communication with the wireless power transmission apparatus using the common channel and having a predetermined second frequency; Setting the selected channel, and transmitting / receiving data to / from the wireless power transmission apparatus through the selected channel.
본 발명의 또 다른 측면에 따른 무선 전력 전송장치는 전원을 공급하는 전원 공급부와, RF 필드를 생성하고, 상기 RF 필드를 통해 무선 전력 수신장치로 무선으로 전력을 제공하는 안테나와, 상기 안테나에 의해 제공되는 전력의 변화를 감지하여, 상기 무선 전력 수신장치의 전력 수신 여부를 상기 제어부로 제공하는 부하감지부와, 미리 정해진 제1주파수를 갖는 공통채널 및 미리 정해진 제2주파수를 갖는 선택채널을 통해 무선 전력 수신장치와의 통신을 수행하는 통신부와, 상기 무선 전력 수신장치의 전력 수신을 확인됨에 대응하여, 상기 통신부가 공통채널을 연결하도록 제어하고, 상기 공통채널을 통해 송수신데이터를 사용하여 상기 선택채널을 결정하고, 상기 통신부의 상기 선택채널 연결을 제어하는 제어부를 포함한다.According to another aspect of the present invention, there is provided a wireless power transmission apparatus comprising: a power supply for supplying power; an antenna for generating an RF field and wirelessly supplying power to the wireless power receiving apparatus through the RF field; A load sensing unit for sensing a change in power supplied to the wireless power receiving apparatus and for providing power to the wireless power receiving apparatus through the selection unit; A communication unit for performing communication with a wireless power receiving apparatus; and a control unit for controlling the communication unit to connect a common channel in response to confirmation of power reception of the wireless power receiving apparatus, And a control unit for determining the channel and controlling the selected channel connection of the communication unit.
본 발명의 또 다른 측면에 따른 무선 전력 수신장치는 상기 무선 전력 전송장치로부터 제공되는 RF를 수신하는 안테나와, 상기 안테나에 의해 수신된 RF를 전력으로 변환하는 전력 변환부와, 미리 정해진 제1주파수를 갖는 공통채널 및 미리 정해진 제2주파수를 갖는 선택채널을 통해 무선 전력 수신장치와의 통신을 수행하는 통신부와, 상기 통신부의 공통채널 연결을 제어하고, 상기 공통채널을 통해 송수신데이터를 사용하여 상기 선택채널을 결정하고, 상기 선택채널의 연결을 제어하는 제어부를 포함한다.According to another aspect of the present invention, there is provided a wireless power receiving apparatus including an antenna for receiving RF provided from the wireless power transmission apparatus, a power conversion unit for converting RF received by the antenna into electric power, A communication unit for performing communication with the wireless power receiving apparatus through a common channel having a predetermined frequency and a selected channel having a predetermined second frequency, and a control unit for controlling the common channel connection of the communication unit, And a control unit for determining a selected channel and controlling connection of the selected channel.
본 발명의 무선 전력 전송 시스템의 통신 방법 및 장치에 따르면, 복수의 무선 전력 전송 장치가 존재하는 환경에서, 무선 전력 수신 장치가 무선 전력을 제공할 전송장치를 보다 빠르게 확인할 수 있다.According to the communication method and apparatus of the wireless power transmission system of the present invention, in an environment where a plurality of wireless power transmission apparatuses exist, the wireless power reception apparatus can more quickly confirm a transmission apparatus to provide wireless power.
또한, 무선 전력을 공급하는 무선 전력 전송 장치와 무선 전력 수신 장치는 한정된 통신 자원을 효율적으로 사용할 수 있는 유리한 효과가 있다.In addition, the wireless power transmission apparatus and the wireless power reception apparatus that supply the wireless power have an advantageous effect that the limited communication resources can be efficiently used.
도 1은 일반적인 다중 무선 전력 전송 시스템의 개념도,
도 2는 본 발명의 일 실시예에 따른 통신 방법이 적용되는 무선 충전 시스템을 나타내는 도면,
도 3은 본 발명의 일 실시예에 따른 무선 충전 통신 방법의 동작 과정을 나타내는 흐름도,
도 4는 본 발명의 일 실시예에 따른 무선 충전 통신 방법이 적용되는 전력 송신기(TX, 100)에 의해 제공되는 무선 전력의 일 예시도,
도 5는 본 발명의 다른 실시예에 따른 무선 충전 통신 방법의 동작 과정을 나타내는 흐름도,
도 6은 본 발명의 다른 실시예에 따른 무선 충전 통신 방법이 적용되는 전력 수신기에 의해 전송되는 탐색 메시지의 전송 타이밍을 예시하는 도면.1 is a conceptual diagram of a general multi-radio power transmission system,
2 illustrates a wireless charging system to which a communication method according to an embodiment of the present invention is applied,
FIG. 3 is a flowchart illustrating an operation procedure of a wireless charging communication method according to an embodiment of the present invention;
FIG. 4 is an example of a wireless power provided by a power transmitter (TX) 100 to which a wireless charging communication method according to an embodiment of the present invention is applied,
FIG. 5 is a flowchart illustrating an operation procedure of a wireless charging communication method according to another embodiment of the present invention;
6 is a diagram illustrating transmission timing of a search message transmitted by a power receiver to which a wireless charging communication method according to another embodiment of the present invention is applied;
이하 본 발명의 바람직한 실시 예들을 첨부한 도면을 참조하여 상세히 설명한다. 하기 설명에서는 구체적인 구성 소자 등과 같은 특정 사항들이 나타나고 있는데 이는 본 발명의 보다 전반적인 이해를 돕기 위해서 제공된 것일 뿐 이러한 특정 사항들이 본 발명의 범위 내에서 소정의 변형이나 혹은 변경이 이루어질 수 있음은 이 기술분야에서 통상의 지식을 가진 자에게는 자명하다 할 것이다. 또한, 본 발명을 설명함에 있어서 본 발명과 관련된 공지 기술에 대한 구체적인 설명이 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 경우에 그 상세한 설명을 생략하기로 한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be appreciated that those skilled in the art will readily observe that certain changes in form and detail may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims. To those of ordinary skill in the art. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.
이하, 본 발명의 실시 예들에서 제1, 제2 등과 같은 서수를 사용하고 있으나, 이는 단지 실질적으로 동일한 기능 또는 절차를 수행하는 동일한 명칭의 소자들 또는 단계들을 서로 구분하기 위한 것이고, 그 순서는 임의로 정할 수 있으며, 후순위의 소자 또는 단계에 대해 선행하는 설명을 준용할 수 있다.Hereinafter, ordinals such as the first, second, etc. are used in the embodiments of the present invention, but this is for distinguishing between elements or steps of the same name which perform substantially the same function or procedure, And the preceding description of the element or step of the subordinate can be applied.
도 2는 본 발명의 일 실시예에 따른 통신 방법이 적용되는 무선 충전 시스템을 나타내는 도면이다. 상기 무선 충전 시스템(10)은 전력 송신기(TX, 100) 및 전력 수신기(RX, 200)를 포함한다.2 is a diagram illustrating a wireless charging system to which a communication method according to an embodiment of the present invention is applied. The
상기 전력 송신기(100)는, 전력 공급부(110), 구동부(120), 제1 공진기(130), 제1 센서부(140), 제1 통신부(150), 제1 표시부(160), 제1 제어부(170) 및 제1 메모리(180)를 포함한다.The
상기 전력 공급부(110)는 외부 전원과 연결되고, 상기 외부 전원과의 연결 상태(온/오프, 인가 전압 등)를 나타내는 신호를 상기 제1 제어부(170)로 출력하고, 상기 제1 제어부(170)의 제어에 따른 전력(전압 및/또는 전류)을 상기 구동부(120)에 공급한다. 본 예와 다르게, 상기 전력 공급부(110)는 미리 설정된 레벨의 전력을 상기 구동부(120)에 공급할 수도 있다.The
상기 구동부(120)는 상기 제1 제어부(170)의 제어에 따라 상기 전력 공급부(110)로부터 공급된 전력을 변환 또는 조절하여 상기 제1 안테나(130)를 위한 구동 신호를 생성하고, 상기 생성된 구동 신호를 상기 제1 안테나(130)로 출력한다. 상기 구동 신호는 일정한 주기를 갖는 펄스, 사인파 등일 수 있다.The
상기 제1 안테나(130)는 상기 구동 신호에 따른 RF 필드를 생성한다. 상기 제1 안테나(130)는 평판 형태를 가질 수 있으며, 상기 제1 안테나(130)의 표면상의 RF 필드 세기는 전체적으로 균일한 분포를 나타내거나, 그 중앙부에서 약하고 그 주변부에서 강한 분포를 나타낼 수 있다.The
나아가, 상기 구동부(120) 및 제1 안테나(130)는 공진 방식 또는 전자기 유도 방식 등과 같이 다양한 무선 충전 방식 중, 적어도 하나의 방식을 통해 전력을 무선으로 전송할 수 있도록 구성된다.Furthermore, the
상기 제1 센서부(140)는 상기 제1 안테나(130)의 충전 가능 영역 내에 전력 수신기(200)가 위치하는지의 여부를 감지하고, 그 감지 정보를 상기 제1 제어부(170)로 출력한다. 상기 제1 센서부(140)는 상기 구동부(120) 내 로드 임피던스(load impedance) 값의 변화, 상기 제1 안테나(130)의 출력(예컨대, 공진 주파수 값, 자기 에너지 등) 변화, 또는 RF 필드의 변화에 따라 변동하는 상기 구동부(120) 또는 상기 제1 안테나(130) 내 신호(예를 들어, 상기 제1 안테나(130)에 제공되는 주기적인 펄스의 파형 변화)를 측정하고, 그 변화 값이 기설정된 임계값 이상인 경우에 상기 충전 가능 영역 내에 전력 수신기(200)가 위치하는 것으로 판단하고, 그 판단 결과를 상기 제1 제어부(170)로 출력한다. 본 예와 다르게, 상기 제1 센서부(140)는 상기 로드 임피던스 값, 공진 주파수 값 또는 기타 신호 값, 또는 그 변화 값에 대한 정보를 상기 제1 제어부(170)로 출력하고, 이러한 측정 대상이 되는 신호의 변화 값이 기설정된 임계값 이상인 경우에, 상기 제1 제어부(170)가 상기 충전 가능 영역 내에 전력 수신기(200)가 위치하는 것으로 판단할 수도 있다.The
상기 제1 통신부(150)는 상기 제1 제어부(170)로부터 입력된 하향 데이터 신호를 상기 전력 수신기(200)로 무선 전송하고, 상기 전력 수신기(200)로부터 무선 수신된 상향 데이터 신호를 상기 제1 제어부(170)로 출력한다. 이때, 상향 및 하향 데이터 신호의 각각은 헤더(header) 및 페이로드(payload)의 기본 구성을 갖는 메시지, 패킷 또는 프레임의 포맷을 갖는다. 상기 각 데이터 신호는 무선 충전을 위한 정보를 나타낸다. 상기 제1 통신부(150)는 지그비(Zigbee), 근거리 무선 통신(Near Field Communication: NFC), 블루투스(Bluetooth), 와이파이(Wifi) 또는 RFID(Radio-Frequency Identification) 등의 전력 전달을 위한 주파수가 아닌 다른 외부 주파수를 사용하는 아웃밴드(out-band) 통신 장치(또는 모듈) 또는 전력 송신에 사용되는 주파수를 변조하여 통신을 하는 인밴드(inband) 통신 장치일 수 있다.The
특히, 상기 제1 통신부(150)는 공통채널 및 선택채널을 사용하여 통신이 가능하도록 구성되며, 데이터 송수신시 사용되는 채널은 공통채널과 선택채널 사이에서 필요에 따라 전환되어 사용된다. 제1 통신부(150)의 공통채널 및 선택채널의 전환은 제1 제어부(170)의 제어하에 설정될 수 있다.In particular, the
상기 제1 표시부(160)는 상기 제1 제어부(170)의 제어에 따라 전력 공급 상태, 충전 상태, 에러 상황, 충전되고 있는 전력 수신기의 개수 등을 사용자에게 표시한다. 상기 제1 표시부(160)로는 터치스크린, LCD(liquid crystal display), LED 어레이(light emitting diode array) 등을 사용할 수 있다.The
상기 제1 제어부(170)는 상기 제1 센서부(140)로부터 수신한 정보, 상기 전력 수신기(200)와의 통신을 통해 획득한 정보 등에 근거하여, 상기 구동부(120)(및 전력 공급부(110))를 제어하여 상기 제1 공진기(130)를 통해 상기 전력 수신기(200)로 전달되는 송신 전력을 조절하고, 상기 전력 송신기(100) 내 다른 구성 소자들을 제어함으로써, 후술하는 전반적인 기능들 또는 단계들을 수행한다.The
특히, 상기 제1 제어부(170)는 상기 제1 통신부(150)가 통신하는데 사용하는 채널을 공통채널과 선택채널 사이에서 전환한다. 상기 제1 제어부(170)에 의한 공통채널 및 선택채널의 전환의 제어는 후술하는 제1 제어부(170)의 동작 설명에서 상세히 설명한다.In particular, the
상기 제1 메모리(180)는 충전을 위해 상기 전력 수신기(200)로 전송할 정보, 상기 전력 수신기(200)로부터 수신한 정보, 충전 가능한 전력 수신기들에 대한 식별 정보를 나타내는 데이터베이스 등을 저장한다. 상기 제1 메모리(180)는 SSD(Solid State Disk), 플래시 메모리 카드(flash memory card), ROM(Read Only Memory) 등과 같은 비휘발성 메모리(Non- Volatile Memory: NVM), RAM(Random Access Memory) 등과 같은 휘발성 메모리 등일 수 있다.The
상기 전력 수신기(200)는, 제2 공진기(210), 전력 변환부(220), 제2 센서부(230), 제2 통신부(240), 제2 표시부(250), 제2 제어부(260) 및 제2 메모리(270)를 포함한다.The
상기 제2 안테나(210)는 상기 전력 송신기(100)에 의해 형성되는 RF 필드를 사용하여 전력 신호를 생성한다. 즉, 상기 제2 안테나(210)는 상기 제1 안테나(130)에 의해 발생한 RF 필드 내에 위치함으로써, 상기 RF 필드에서 발생되는 정자기 에너지를 흡수하여 전력을 생성한다.The
상기 전력 변환부(220)는 충전될 대상 기기(휴대폰, PDA(personal digital assistant), PMP(portable multimedia player), MP3 플레이어 등과 같은 휴대용 통신 단말)와 연결되고, 상기 전력 신호를 상기 대상 기기의 충전을 위한 충전 전압으로 변환하고, 상기 충전 전압을 상기 대상 기기에 제공한다. 상기 전력 변환부(220)는 상기 대상 기기의 충전 상태를 나타내는 신호를 상기 제2 제어부(260)로 출력한다.The
상기 제2 센서부(230)는 상기 제1 안테나(130)의 충전 가능 영역 내에 상기 전력 수신기(200)가 위치하는지의 여부를 감지하고, 그 감지 정보를 상기 제2 제어부(260)로 출력한다. 상기 제2 센서부(230)는 상기 제2 안테나(210)의 출력(예컨대, 공진 주파수 값, 자기 에너지 등) 변화 등을 측정하고, 그 변화 값이 기설정된 임계값 이상인 경우에 상기 충전 가능 영역 내에 상기 전력 수신기(200)의 제2 안테나(210)가 위치하는 것으로 판단하고, 그 판단 결과를 상기 제2 제어부(260)로 출력한다. 본 예와 다르게, 상기 제2 센서부(230)는 상기 공진 주파수 값 또는 상기 제2 안테나(210)의 출력 값, 또는 그 변화 값에 대한 정보를 상기 제2 제어부(260)로 출력하고, 이러한 측정 대상이 되는 신호의 변화 값이 기설정된 임계값 이상인 경우에, 상기 제2 제어부(260)가 상기 충전 가능 영역 내에 상기 전력 수신기(200)가 위치하는 것으로 판단할 수도 있다.The
상기 제2 통신부(240)는 상기 제2 제어부(260)로부터 입력된 상향 데이터 신호를 상기 전력 송신기(100)로 무선 전송하고, 상기 전력 송신기(100)로부터 무선 수신된 하향 데이터 신호를 상기 제2 제어부(260)로 출력한다. 상기 각 데이터 신호는 무선 충전을 위한 정보를 나타낸다. 상기 제2 통신부(240)는 상기 제1 통신부(150)의 통신 방식(사용 주파수, 프로토콜 등을 포함)으로 작동 가능한 통신 장치이다. 상기 제1 및 제2 통신부(150, 240)의 통신 방식은 양자의 협의, 상기 제1 통신부(150) 측의 통지 또는 선택에 의하거나, 미리 설정된 것일 수 있다.The
특히, 상기 제2 통신부(240)는 공통채널 및 선택채널을 사용하여 통신이 가능하도록 구성되며, 데이터 송수신시 사용되는 채널은 공통채널과 선택채널 사이에서 필요에 따라 전환되어 사용된다. 제2 통신부(240)의 공통채널 및 선택채널의 전환은 제2 제어부(260)의 제어하에 설정될 수 있다.In particular, the
상기 제2 표시부(250)는 상기 제2 제어부(260)의 제어에 따라 충전 상태, 에러 상황 등을 사용자에게 표시한다. 상기 제2 표시부(250)로는 터치스크린, LCD, LED 어레이 등을 사용할 수 있다.The
상기 제2 제어부(260)는 상기 제2 센서부(230)로부터 수신된 정보, 상기 전력 송신기(100)와의 통신을 통해 획득한 정보 등에 근거하여, 상기 대상 기기의 충전을 수행하고, 상기 제2 통신부(240)를 통해 요구되는 전력 등의 정보를 상기 전력 송신기(100)로 송신한다. 상기 제2 제어부(260)는 상기 전력 수신기(200) 내 다른 구성 소자들을 제어함으로써, 후술하는 전반적인 기능들 또는 단계들을 수행한다.The
특히, 상기 제2 제어부(260)는 상기 제2 통신부(240)가 통신하는데 사용하는 채널을 공통채널과 선택채널 사이에서 전환되도록 제어한다. 상기 제2 제어부(260)에 의한 공통채널 및 선택채널의 전환 제어는 후술하는 제2 제어부(260)의 동작 설명에서 상세히 설명한다.In particular, the
상기 제2 메모리(270)는 충전을 위해 상기 전력 송신기(100)로 전송할 정보, 상기 전력 송신기(100)로부터 수신한 정보 등을 저장한다. 상기 제2 메모리(270)는 비휘발성 메모리, 휘발성 메모리 등일 수 있다.The
이하, 전술한 본 발명의 일실시 예에 따른 통신 방법이 적용되는 무선 충전 시스템의 동작을, 전력 송신기(TX, 100)에 구비된 상기 제1 제어부(170) 및 전력 수신기(RX, 200)에 구비된 제2 제어부(260)를 중심으로 설명하면서, 본 발명의 일 실시예에 따른 통신 방법의 진행 과정을 설명한다.The operation of the wireless charging system to which the communication method according to one embodiment of the present invention is applied will now be described with reference to the
도 3은 본 발명의 일실시 예에 따른 무선 충전 통신 방법의 동작 과정을 나타내는 흐름도이고, 도 4는 본 발명의 일실시 예에 따른 무선 충전 통신 방법이 적용되는 전력 송신기(TX, 100)에 의해 제공되는 무선 전력을 예시한다. 도 3은 전력 송신기(TX, 100)에 구비된 상기 제1 제어부(170) 및 전력 수신기(RX, 200)에 구비된 제2 제어부(260)의 동작을 상세히 개시하고 있으며, 제1 제어부(170)의 동작부분은 (a)로, 제2 제어부(260)의 동작부분은 (b)로 구분하여 나타낸다.FIG. 3 is a flowchart illustrating an operation procedure of a wireless charging communication method according to an embodiment of the present invention. FIG. 4 is a flowchart illustrating a wireless charging communication method according to an exemplary embodiment of the present invention. And illustrates the provided wireless power. 3 illustrates in detail the operation of the
우선, 전력 송신기(100)는 제1 안테나(130)에 낮은 파워(P1, 도 4 참조)를 갖는 펄스를 미리 정해진 시간 단위(A, 도 4 참조)마다 주기적으로 공급하면서, 상기 제1 안테나(130)에 걸리는 부하(load)를 모니터링(monitoring)한다.First, the
이 과정에서, 전력 송신기(100)가 커버하는 무선 충전 영역 내에 전력 수신기(RX, 200)가 위치하게 되면, 전력 수신기(RX, 200)에 구비된 상기 제2 안테나(210)는 상기 제1 안테나(130)에 의해 발생한 RF 필드에서 발생되는 전자기 에너지를 흡수하게 된다(S111 단계).In this process, when the power receiver (RX, 200) is located in the wireless charging area covered by the
이에 따라, 상기 전력 송신기(100)에서 제공하는 부하에 변화가 발생하게 되며, 상기 전력 송신기(100)의 충전 가능 영역 내에 충전하려는 물체(즉, 상기 제1 전력 수신기(200))가 진입한 것으로 감지한다(S112 단계). 상기 제1 전력 수신기(200)가 감지되면, 상기 전력 송신기(100)의 제1 제어부(170)는 기설정된 제1 전력 레벨(P2, 도 4 참조)로 송신 전력이 증가 되도록 제어하여, 상기 제1 전력 수신기(200)에 통신 가능한 정도의 전력(P2, 도 4 참조)을 공급한다. 본 발명의 일 실시예에서, 상기 제1 제어부(170)는, 불필요한 전력 소모를 피하기 위해, 상기 제1 전력 수신기(200)가 감지된 이후에 상기 기설정된 제1 전력 레벨(P2)로 송신 전력을 증가시키는 것으로 예시하고 있으나, 상기 제1 제어부(170)는 상기 모니터링 단계에서부터 제1 전력 레벨로 전력(P2)을 송신할 수도 있다.Accordingly, when the load provided by the
다음으로, 상기 제2 제어부(260)는 상기 제2 통신부(240)의 통신 채널을 공통채널로 설정하고(S113 단계), 이와 동시에 상기 제1 제어부(170) 역시 상기 제1 통신부(150)의 통신 채널을 공통채널로 설정하게 된다(S114 단계).The
상기 제1 통신부(150)와 제2 통신부(240)는 상향 및 하향 데이터 신호를 생성하여 공통채널을 사용하여 서로 데이터를 교환하고, 상기 공통채널을 통해 교환되는 신호의 세기 등을 고려하여, 통신을 진행할 대상 기기와 상기 대상기기가 지원하는 선택채널을 확인하게 된다(S120 단계).The
구체적으로, 상기 제1 제어부(170)는 상기 제1 통신부(150)로 선택채널을 위한 메시지를 브로드캐스팅할 메시지 생성을 제어하고, 이에 대응하여 상기 제1 통신부(150)는 브로드캐스팅 메시지를 생성한다(S121 단계). 상기 브로드캐스팅 메시지는 상기 전력 송신기(100)의 식별자 및 상기 전력 송신기(100)에 설정된 선택채널 정보를 포함한다.Specifically, the
브로드캐스팅 메시지가 생성되면, 상기 제1 제어부(170)는 상기 브로드캐스팅 메시지의 브로드캐스팅을 제어하고, 상기 제1 통신부(150)는 상기 브로드캐스팅 메시지를 공통채널을 사용하여 브로드캐스팅하게 된다(S122 단계).When the broadcasting message is generated, the
한편, 상기 전력 수신기(200)에 구비된 제2 통신부(240)는 공통채널을 통해 전송되는 브로드캐스팅 메시지를 수신하고(S123 단계), 상기 제2 제어부(240)는 상기 브로드캐스팅 메시지를 수신하는 과정에서의 통신 환경(예컨대, RSSI 값 등)을 확인한다(S124 단계). 상기 S123 단계 및 S124 단계는 근접한 전력 송신기(100)에서 브로드캐스팅되는 메시지를 충분히 수신할 수 있도록 미리 정해진 시간동안 지속될 수 있으며, 상기 S124 단계에서 확인된 통신 환경은 상기 미리 정해진 시간동안 임시로 저장될 수 있다.Meanwhile, the
음으로, S125 단계에서, 상기 제2 제어부(240)는 상기 수신된 브로드캐스팅 메시지 중, 가장 좋은 통신환경에서 수신된 브로드캐스팅 메시지를 선택하고, 상기 선택된 브로드캐스팅 메시지에 포함된 정보, 즉 상기 전력 송신기(100)의 식별자 및 상기 전력 송신기(100)에 설정된 선택채널 정보를 확인하여, 상기 선택된 브로드캐스팅 메시지에 대응하는 선택채널을 선택하고, 해당 상기 전력 송신기(100)로 응답 메시지를 전송한다.In step S125, the
나아가, 125 단계에서, 상기 제2 제어부(240)는 상기 수신된 브로드캐스팅 메시지 중, 미리 정해진 임계값 이상의 통신 환경을 나타내는 전력 송신기(100)가 존재할 경우, 상기 미리 정해진 임계값 이상의 통신 환경을 나타내는 전력 송신기(100)와의 통신 환경을 재 조사하기 위하여, 상기 미리 정해진 임계값 이상의 통신 환경을 나타내는 전력 송신기(100)들로 선택채널을 요청하는 메시지를 전송하도록 상기 제2 통신부(240)를 제어하고, 이에 대응하여 수신되는 응답 메시지를 통해 가장 좋은 통신환경을 갖는 전력 송신기(100) 및 선택채널을 결정할 수도 있다.Further, in step 125, when there is a
나아가, 상기 제1 제어부(170)는 상기 S121 단계에서, 미리 정해진 소정의 시간 동안의 부하 변화값을 확인한 후, 이에 대한 정보, 즉 전송 부하변화 정보를 생성하고, 상기 브로드캐스팅 메시지에 상기 전송 부하변화 정보를 더 포함하여 구성할 수도 있다. 그리고, 이에 대응하여 상기 제2 제어부(240)는 전력 수신기(200)측에 마련된 센서부(230)에서 제공되는 부하 변화값을 통해 수신 부하변화 정보를 확인하고, 상기 브로드캐스팅 메시지에 포함된 상기 전송 부하변화 정보와 상기 수신 부하변화 정보를 비교하여, 서로 일치하는 정도를 확인할 수 있고, 이(상기 전송 부하변화 정보와 수신 부하변화 정보의 일치 정도)를 선택채널을 결정하는데 반영할 수 있다.In addition, the
다음으로, 상기 제2 제어부(240)는 상기 제2 통신부(240)가 상기 S125 단계에서 선택된 전력 송신기(100)로 응답메시지를 전송하도록 제어하고, 상기 제2 통신부(240)의 통신 채널이 상기 선택된 선택채널로 전환되도록 제어한다(S141).Next, the
한편, 상기 선택된 전력 송신기(100)의 제1 통신부(150)는 상기 응답 메시지를 수신하고, 이를 제1 제어부(170)로 전달하고, 이에 대응하여 상기 제1 제어부(170) 역시 제1 통신부(150)의 통신채널이 상기 선택채널로 전환되도록 제어한다(S142).The
도 5는 본 발명의 다른 실시예에 따른 무선 충전 통신 방법의 동작 과정을 나타내는 흐름도이고, 도 6은 본 발명의 일실시 예에 따른 무선 충전 통신 방법이 적용되는 전력 수신기(RX, 200)에 의해 전송되는 탐색 메시지의 전송 타이밍을 예시한다. 도 5는 본 발명의 일 실시예를 도시하는 도3과 마찬가지로, 전력 송신기(TX, 100)에 구비된 상기 제1 제어부(170) 및 전력 수신기(RX, 200)에 구비된 제2 제어부(260)의 동작을 모두 개시하고 있으며, 제1 제어부(170)의 동작부분은 (a)로, 제2 제어부(260)의 동작부분은 (b)로 구분하여 나타낸다.FIG. 5 is a flowchart illustrating an operation procedure of a wireless charging communication method according to another embodiment of the present invention. FIG. 6 is a flowchart illustrating an operation procedure of a wireless charging communication method according to another embodiment of the present invention. The transmission timing of the transmitted search message is illustrated. FIG. 5 is a block diagram of a
도 5를 참조하면, 본 발명의 다른 실시예에 따른 무선 충전 통신 방법은 본 발명의 일 실시예에 따른 무선 충전 통신 방법과 거의 동일하지만, 선택채널을 확인하는 과정의 상세 동작이 다르게 구성된다. 즉, S111, S112, S113, S114, S141, 및 S142 단계는 본 발명의 일 실시예에 따른 무선 충전 통신 방법에서와 동일하게 수행되지만, S130 단계가 다르게 구성된다.Referring to FIG. 5, the wireless charging communication method according to another embodiment of the present invention is substantially the same as the wireless charging communication method according to an embodiment of the present invention, but the detailed operation of the process of confirming the selected channel is different. That is, steps S111, S112, S113, S114, S141, and S142 are performed in the same manner as in the wireless charging communication method according to an embodiment of the present invention, but the step S130 is configured differently.
구체적으로, 상기 제2 제어부(260)는 상기 제2 통신부(240)로 전력 송신기(100)의 탐색을 위해, 브로드캐스팅할 탐색 메시지의 생성과, 상기 생성된 탐색 메시지의 공통채널을 통한 전송을 제어한다(S131 단계). 상기 탐색 메시지는 상기 전력 수신기(200)의 식별자를 포함할 수 있으며, 상기 탐색 메시지의 전송 주기(B, 도 6(b)참조)는 부하 감지를 통해 발행되는 젼력 펄스의 주기(A, 도 6(a)참조)보다 상대적으로 크게 설정될 수 있다.Specifically, the
한편, 상기 전력 송신기(200)에 구비된 제1 통신부(150)는 공통채널을 통해 전송되는 탐색 메시지를 수신하고(S132 단계), 상기 제1 제어부(150)는 상기 탐색 메시지를 수신하는 과정에서의 통신 환경(예컨대, RSSI 값 등)을 확인한다(S133 단계). 다음으로, S134 단계에서, 상기 제2 제어부(240)는 상기 수신된 탐색 메시지 중, 미리 정해진 임계값을 갖는 탐색 메시지에 대응하여, 공통채널을 사용하여 제1 응답 메시지를 전송하게 된다. 상기 제1 응답 메시지는 상기 전력 송신기(100)의 식별자 및 상기 전력 송신기(100)에 설정된 선택채널 정보를 포함할 수 있다.Meanwhile, the
한편, 상기 전력 수신기(200)에 구비된 제2 통신부(240)는 공통채널을 통해 전송되는 상기 제1 응답 메시지를 수신하고(S135 단계), 상기 제2 제어부(240)는 상기 제1 응답 메시지를 수신하는 과정에서의 통신 환경(예컨대, RSSI 값 등)을 다시 확인한다(S136 단계). 상기 S135 단계 및 S136 단계는 근접한 전력 송신기(100)에서 전송되는 제1 응답 메시지를 충분히 수신할 수 있도록 미리 정해진 시간동안 지속될 수 있으며, 상기 S136 단계에서 확인된 통신 환경은 상기 미리 정해진 시간동안 임시로 저장될 수 있다. 다음으로, S137 단계에서, 상기 제2 제어부(240)는 상기 수신된 제1 응답 메시지 중, 가장 좋은 통신환경에서 수신된 제1 응답 메시지를 선택하고, 상기 선택된 제1 응답 메시지에 포함된 정보, 즉 상기 전력 송신기(100)의 식별자 및 상기 전력 송신기(100)에 설정된 선택채널 정보를 확인하여, 상기 선택된 제1 응답 메시지에 대응하는 선택채널을 선택한다.Meanwhile, the
나아가, 상기 제1 제어부(170)는 상기 S134 단계에서, 미리 정해진 소정의 시간 동안의 부하 변화값을 확인한 후, 이에 대한 정보, 즉 전송 부하변화 정보를 생성하고, 상기 제1 응답 메시지에 상기 전송 부하변화 정보를 더 포함하여 구성할 수도 있다. 그리고, 이에 대응하여 상기 제2 제어부(240)는 전력 수신기(200)측에 마련된 센서부(230)에서 제공되는 부하 변화값을 통해 수신 부하변화 정보를 확인하고, 상기 제1 응답 메시지에 포함된 상기 전송 부하변화 정보와 상기 수신 부하변화 정보를 비교하여, 서로 일치하는 정도를 확인할 수 있고, 이(상기 전송 부하변화 정보와 수신 부하변화 정보의 일치 정도)를 선택채널을 결정하는데 반영할 수 있다.In addition, the
다음으로, 상기 제2 제어부(240)는 상기 제2 통신부(240)가 상기 S125 단계에서 선택된 전력 송신기(100)로 제2 응답 메시지를 전송하도록 제어하고(S138 단계), 상기 제2 통신부(240)의 통신 채널이 상기 선택된 선택채널로 전환되도록 제어한다(S141).Next, the
이에 대응하여, 상기 선택된 전력 송신기(100)의 제1 통신부(150)는 상기 제2 응답 메시지를 수신하고, 이를 제1 제어부(170)로 전달하게 되고, 상기 제1 제어부(170) 역시 제1 통신부(150)의 통신채널이 상기 선택채널로 전환되도록 제어한다(S142).In response to this, the
본 발명의 실시 예들은 하드웨어, 소프트웨어 또는 하드웨어 및 소프트웨어의 조합의 형태로 실현 가능하다는 것을 알 수 있을 것이다. 이러한 임의의 소프트웨어는 예를 들어, 삭제 가능 또는 재기록 가능 여부와 상관없이, ROM 등의 저장 장치와 같은 휘발성 또는 비휘발성 저장 장치, 또는 예를 들어, RAM, 메모리 칩, 장치 또는 집적 회로와 같은 메모리, 또는 예를 들어 CD, DVD, 자기 디스크 또는 자기 테이프 등과 같은 광학 또는 자기적으로 기록 가능함과 동시에 기계로 읽을 수 있는 저장 매체에 저장될 수 있다. 전력 송신기 또는 전력 수신기 내에 포함될 수 있는 메모리는 본 발명의 실시 예들을 구현하는 지시들을 포함하는 프로그램 또는 프로그램들을 저장하기에 적합한 기계로 읽을 수 있는 저장 매체의 한 예임을 알 수 있을 것이다. 따라서, 본 발명은 본 명세서의 임의의 청구항에 기재된 장치 또는 방법을 구현하기 위한 코드를 포함하는 프로그램 및 이러한 프로그램을 저장하는 기계로 읽을 수 있는 저장 매체를 포함한다. 또한, 이러한 프로그램은 유선 또는 무선 연결을 통해 전달되는 통신 신호와 같은 임의의 매체를 통해 전자적으로 이송될 수 있고, 본 발명은 이와 균등한 것을 적절하게 포함한다.It will be appreciated that embodiments of the present invention may be implemented in hardware, software, or a combination of hardware and software. Such arbitrary software may be stored in a memory such as, for example, a volatile or non-volatile storage device such as a storage device such as ROM or the like, or a memory such as a RAM, a memory chip, a device or an integrated circuit, , Or stored in a machine-readable storage medium, such as optical, or magnetically recordable, such as, for example, a CD, DVD, magnetic disk or magnetic tape. It will be appreciated that the memory that may be included in the power transmitter or power receiver is an example of a machine-readable storage medium suitable for storing programs or programs containing instructions embodying embodiments of the present invention. Accordingly, the invention includes a program comprising code for implementing the apparatus or method as claimed in any of the claims, and a machine-readable storage medium storing such a program. In addition, such a program may be electronically transported through any medium such as a communication signal transmitted via a wired or wireless connection, and the present invention appropriately includes the same.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/604,000US9054547B2 (en) | 2011-09-06 | 2012-09-05 | Communication method and apparatus in wireless recharging system |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201161531343P | 2011-09-06 | 2011-09-06 | |
| US61/531,343 | 2011-09-06 | ||
| US201161532404P | 2011-09-08 | 2011-09-08 | |
| US61/532,404 | 2011-09-08 |
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| KR20130026977Atrue KR20130026977A (en) | 2013-03-14 |
| KR101966302B1 KR101966302B1 (en) | 2019-04-05 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020120083440AExpired - Fee RelatedKR101966302B1 (en) | 2011-09-06 | 2012-07-30 | Communication method and apparatus in wireless charge system |
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| KR (1) | KR101966302B1 (en) |
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