WO2023022441A1 - 무선 전력 전송 시스템에서 동시 다중의 데이터 통신 방법 및 장치 - Google Patents
무선 전력 전송 시스템에서 동시 다중의 데이터 통신 방법 및 장치 Download PDFInfo
- Publication number
- WO2023022441A1 WO2023022441A1 PCT/KR2022/012032 KR2022012032W WO2023022441A1 WO 2023022441 A1 WO2023022441 A1 WO 2023022441A1 KR 2022012032 W KR2022012032 W KR 2022012032W WO 2023022441 A1 WO2023022441 A1 WO 2023022441A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wireless power
- packet
- data stream
- power transmitter
- power receiver
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 175
- 230000005540 biological transmission Effects 0.000 title claims abstract description 118
- 230000006854 communication Effects 0.000 title claims description 204
- 238000004891 communication Methods 0.000 title claims description 204
- 238000012546 transfer Methods 0.000 claims abstract description 88
- 108091006146 Channels Proteins 0.000 description 113
- 239000003999 initiator Substances 0.000 description 74
- 230000004044 response Effects 0.000 description 40
- 230000006870 function Effects 0.000 description 32
- 102100036409 Activated CDC42 kinase 1 Human genes 0.000 description 30
- 238000010586 diagram Methods 0.000 description 23
- 230000000977 initiatory effect Effects 0.000 description 16
- 230000008569 process Effects 0.000 description 15
- 230000000694 effects Effects 0.000 description 14
- 230000008093 supporting effect Effects 0.000 description 13
- 230000006698 induction Effects 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 10
- 238000001914 filtration Methods 0.000 description 8
- 238000001646 magnetic resonance method Methods 0.000 description 8
- 238000012545 processing Methods 0.000 description 7
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 230000006978 adaptation Effects 0.000 description 4
- 230000007175 bidirectional communication Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000012937 correction Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000012790 confirmation Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000003826 tablet Substances 0.000 description 3
- 101000741965 Homo sapiens Inactive tyrosine-protein kinase PRAG1 Proteins 0.000 description 2
- 102100038659 Inactive tyrosine-protein kinase PRAG1 Human genes 0.000 description 2
- 230000006399 behavior Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 230000010363 phase shift Effects 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 206010000210 abortion Diseases 0.000 description 1
- 230000002730 additional effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 230000001976 improved effect Effects 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- CPTNXTSDQJQEFA-ZKOWQLKRSA-N mastoparan-A Chemical compound C1=CC=C2C(C[C@H](NC(=O)[C@H](CCCCN)NC(=O)[C@@H](N)[C@@H](C)CC)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](C)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CC(O)=O)C(=O)N[C@@H](C)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H]([C@@H](C)CC)C(N)=O)=CNC2=C1 CPTNXTSDQJQEFA-ZKOWQLKRSA-N 0.000 description 1
- NSFBOCKFBVQQKB-CQWNSWRRSA-N mastoparan-B Chemical compound C1=CC=C2C(C[C@H](NC(=O)[C@H](CO)NC(=O)[C@H](C(C)C)NC(=O)[C@@H](NC(=O)[C@H](CO)NC(=O)[C@H](CCCCN)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](CCCCN)NC(=O)[C@@H](N)CC(C)C)[C@@H](C)CC)C(=O)N[C@@H](C)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CC(C)C)C(N)=O)=CNC2=C1 NSFBOCKFBVQQKB-CQWNSWRRSA-N 0.000 description 1
- 239000005300 metallic glass Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920001690 polydopamine Polymers 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 239000004984 smart glass Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 230000002618 waking effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00034—Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/24—Inductive coupling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/72—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for local intradevice communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/79—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/40—Network security protocols
Definitions
- This specification relates to wireless power transfer.
- Wireless power transfer technology is a technology for wirelessly transferring power between a power source and an electronic device.
- the wireless power transmission technology allows a wireless terminal such as a smartphone or tablet to be charged by simply placing the wireless terminal on a wireless charging pad, thereby providing a more efficient wired charging environment than a wired charging environment using an existing wired charging connector. It can provide excellent mobility, convenience and safety.
- wireless power transmission technology is used in various fields such as electric vehicles, various wearable devices such as Bluetooth earphones or 3D glasses, home appliances, furniture, underground facilities, buildings, medical devices, robots, and leisure. It is attracting attention as a replacement for the existing wired power transmission environment.
- the wireless power transmission method is also referred to as a contactless power transmission method, a no point of contact power transmission method, or a wireless charging method.
- a wireless power transmission system includes a wireless power transmission device for supplying electrical energy in a wireless power transmission method, and a wireless power reception device for receiving electrical energy wirelessly supplied from the wireless power transmission device and supplying power to a power receiving device such as a battery cell. device can be configured.
- Wireless power transfer technology is a method of transferring power through magnetic coupling, a method of transferring power through radio frequency (RF), a method of transferring power through microwave, and ultrasonic waves.
- RF radio frequency
- the magnetic induction method is a method of transmitting energy using a current induced in a receiving coil due to a magnetic field generated in a transmitting coil battery cell according to electromagnetic coupling between a transmitting coil and a receiving coil.
- the magnetic resonance method is similar to the magnetic induction method in that it uses a magnetic field.
- the wireless power transmitter transmits the first data stream to the wireless power receiver, and the wireless power transmitter opens transmission of the second data stream while transmitting the first data stream.
- (Open) can be provided a method and apparatus characterized in that.
- the efficiency of a data transport stream is improved, stable data communication is provided, and open/close of a data stream channel can be performed for various applications.
- FIG. 1 is a block diagram of a wireless power system 10 according to one embodiment.
- FIG. 2 is a block diagram of a wireless power system 10 according to another embodiment.
- FIG 3 shows an embodiment of various electronic devices to which a wireless power transmission system is introduced.
- FIG. 4 is a block diagram of a wireless power transmission system according to an embodiment.
- FIG. 5 is a diagram illustrating an example of a Bluetooth communication architecture to which an embodiment according to the present specification may be applied.
- FIG. 6 is a block diagram illustrating a wireless power transmission system using BLE communication according to an example.
- FIG. 7 is a block diagram illustrating a wireless power transmission system using BLE communication according to another example.
- FIG. 8 is a state transition diagram for explaining a wireless power transmission procedure.
- FIG. 10 schematically illustrates an example of the protocol of the configuration phase 820 .
- FIG. 11 is a diagram illustrating a message field of a configuration packet (CFG) of a wireless power receiver according to an embodiment.
- CFG configuration packet
- FIG. 12 is a flowchart schematically illustrating a protocol of a negotiation step or a renegotiation step according to an embodiment.
- FIG. 13 is a diagram illustrating a message field of a capability packet (CAP) of a wireless power transmitter according to an embodiment.
- CAP capability packet
- FIG. 14 schematically illustrates a flow diagram of data flow for power transfer phase 840 in the baseline protocol.
- 15 schematically illustrates a flow diagram of data flow for power transfer phase 840 in the extended protocol.
- 16 illustrates an application-level data stream between the wireless power transmitter 100 and the wireless power receiver 200 according to an example.
- FIG. 17 illustrates a power control method according to an embodiment.
- 21 and 22 schematically show protocols in MPP pull mode.
- 25 schematically illustrates an example in which an application message is transmitted from a data stream initiator to a data stream responder.
- 26 schematically shows a flow chart for data transmission from the application point of view.
- FIG 27 schematically illustrates an example in which another data transport stream is opened after one data transport stream is closed.
- 31 and 32 are flow charts of an example of simultaneous bi-directional data communication, in accordance with an embodiment of the present disclosure.
- 33 and 34 are flowcharts of an example of multiple data communication, according to embodiments herein.
- 35 schematically illustrates an example of a separate data stream close packet.
- 39 is a flowchart of a method of transmitting wireless power from the perspective of a wireless power transmitter according to an embodiment of the present specification.
- FIG. 40 is a flowchart of a method of receiving wireless power from the point of view of a wireless power receiver according to an embodiment of the present specification.
- a or B may mean “only A”, “only B” or “both A and B”.
- a or B (A or B)” in the present specification may be interpreted as “A and / or B (A and / or B)”.
- A, B or C herein means “only A”, “only B”, “only C”, or “any combination of A, B and C ( any combination of A, B and C)”.
- a slash (/) or comma (comma) used in this specification may mean “and/or”.
- A/B may mean “A and/or B”. Accordingly, “A/B” can mean “only A”, “only B”, or “both A and B”.
- A, B, C may mean “A, B or C”.
- At least one of A and B may mean “only A”, “only B” or “both A and B”.
- the expression “at least one of A or B” or “at least one of A and/or B” means “at least one of A and B (at least one of A and B)”.
- At least one of A, B and C means “only A”, “only B”, “only C”, or “A, B and C”. It may mean any combination of A, B and C”. Also, “at least one of A, B or C” or “at least one of A, B and/or C” means It can mean “at least one of A, B and C”.
- control information may be suggested as an example of “control information”.
- control information in this specification is not limited to “PDCCH”, and “PDCCH” may be suggested as an example of “control information”.
- PDCCH control information
- wireless power refers to any form related to an electric field, a magnetic field, an electromagnetic field, etc. transmitted from a wireless power transmitter to a wireless power receiver without using physical electromagnetic conductors.
- Wireless power may also be called a wireless power signal, and may mean an oscillating magnetic flux enclosed by a primary coil and a secondary coil.
- Power conversion in a system is described herein to wirelessly charge devices including, for example, mobile phones, cordless phones, iPods, MP3 players, headsets, and the like.
- the basic principle of wireless power transmission is, for example, a method of transferring power through magnetic coupling, a method of transferring power through radio frequency (RF), and microwave ) and a method of transmitting power through ultrasonic waves.
- RF radio frequency
- FIG. 1 is a block diagram of a wireless power system 10 according to one embodiment.
- a wireless power system 10 includes a wireless power transmitter 100 and a wireless power receiver 200 .
- the wireless power transmitter 100 receives power from an external power source S and generates a magnetic field.
- the wireless power receiver 200 receives power wirelessly by generating a current using the generated magnetic field.
- the wireless power transmitter 100 and the wireless power receiver 200 may transmit and receive various information required for wireless power transmission.
- communication between the wireless power transmitter 100 and the wireless power receiver 200 is in-band communication using a magnetic field used for wireless power transmission or out-band communication using a separate communication carrier.
- (out-band communication) may be performed according to any one method.
- Out-band communication may also be referred to as out-of-band communication.
- terminology is uniformly described as out-band communication. Examples of out-band communication may include NFC, Bluetooth, Bluetooth Low Energy (BLE), and the like.
- the wireless power transmitter 100 may be provided in a fixed or mobile type.
- the fixed type include a form embedded in furniture such as an indoor ceiling, wall, or table, a form installed in an implant form in an outdoor parking lot, a bus stop or a subway station, a form installed in a vehicle or a vehicle, or a form of transportation such as a train, etc.
- the mobile wireless power transmitter 100 may be implemented as a part of another device, such as a mobile device having a movable weight or size or a cover of a notebook computer.
- the wireless power receiving device 200 should be interpreted as a comprehensive concept including various electronic devices having batteries and various home appliances powered by wireless power instead of power cables.
- Representative examples of the wireless power receiver 200 include a portable terminal, a cellular phone, a smart phone, a personal digital assistant (PDA), and a portable media player (PMP: Portable Media Player), Wibro terminal, tablet, phablet, notebook, digital camera, navigation terminal, television, electric vehicle (EV), and the like.
- FIG. 2 is a block diagram of a wireless power system 10 according to another embodiment.
- one or more wireless power receivers 200 may be provided in the wireless power system 10 .
- the wireless power transmitter 100 and the wireless power receiver 200 are represented as exchanging power one-to-one, but as shown in FIG. 2, one wireless power transmitter 100 is connected to a plurality of wireless power receivers. It is also possible to transfer power to (200-1, 200-2,..., 200-M).
- one wireless power transmitter 100 simultaneously transmits multiple wireless power receivers 200-1, 200-2, ...,200-M) can deliver power.
- FIG. 1 shows a state in which the wireless power transmitter 100 directly transfers power to the wireless power receiver 200, but a wireless connection between the wireless power transmitter 100 and the wireless power receiver 200
- a separate wireless power transmission/reception device such as a relay or a repeater for increasing a power transmission distance may be provided.
- power may be transferred from the wireless power transmitter 100 to the wireless power transmitter/receiver, and the wireless power transmitter/receiver may transfer power to the wireless power receiver 200 again.
- the wireless power receiver, power receiver, and receiver referred to in this specification refer to the wireless power receiver 200.
- the wireless power transmitter, power transmitter, and transmitter referred to in this specification refer to the wireless power receiving and transmitting apparatus 100.
- FIG 3 shows an embodiment of various electronic devices to which a wireless power transmission system is introduced.
- FIG. 3 shows electronic devices classified according to the amount of power transmitted and received in the wireless power transmission system.
- wearable devices such as smart watches, smart glasses, HMDs (Head Mounted Displays), and smart rings, earphones, remote controls, smartphones, PDAs, and tablets
- a low-power (about 5W or less or about 20W or less) wireless charging method may be applied to mobile electronic devices (or portable electronic devices) such as PCs.
- a medium-power (less than about 50W or less than about 200W) wireless charging method may be applied to small/medium-sized home appliances such as laptop computers, robot vacuum cleaners, TVs, sound devices, vacuum cleaners, and monitors.
- Kitchen appliances such as blenders, microwave ovens, and electric rice cookers, personal mobile devices (or electronic devices/transportation devices) such as wheelchairs, electric kickboards, electric bicycles, and electric vehicles are of high power (approximately 2kW or less or 22kW or less)
- a wireless charging method may be applied.
- the above-described (or illustrated in FIG. 1 ) electronic devices/mobile devices may each include a wireless power receiver described later. Accordingly, the above-described electronic devices/mobile means may be charged by wirelessly receiving power from the wireless power transmitter.
- WPC wireless power consortium
- AFA air fuel alliance
- PMA power matters alliance
- the WPC standard defines a baseline power profile (BPP) and an extended power profile (EPP).
- BPP relates to a wireless power transmitter and receiver supporting power transmission of 5W
- EPP relates to a wireless power transmitter and receiver supporting power transmission in a range greater than 5W and less than 30W.
- WPC classifies wireless power transmitter and receiver into power class (PC) -1, PC0, PC1, and PC2, and provides standard documents for each PC.
- PC power class
- the PC-1 standard relates to wireless power transmitters and receivers that provide guaranteed power of less than 5W.
- Applications of PC-1 include wearable devices such as smart watches.
- the PC0 standard relates to wireless power transmitters and receivers that provide guaranteed power of 5W.
- the PC0 standard includes EPP with guaranteed power up to 30W.
- In-band (IB) communication is a mandatory communication protocol of PC0, but out-band (OB) communication used as an optional backup channel may also be used.
- the wireless power receiver may identify whether OB is supported by setting an OB flag in a configuration packet.
- a wireless power transmitter supporting OB may enter an OB handover phase by transmitting a bit-pattern for OB handover as a response to the configuration packet.
- a response to the configuration packet may be NAK, ND, or a newly defined 8-bit pattern.
- Applications of PC0 include smartphones.
- the PC1 standard relates to wireless power transmitters and receivers that provide guaranteed power of 30W to 150W.
- OB is the essential communication channel for PC1
- IB is used as initialization and link establishment to OB.
- the wireless power transmitter may enter the OB handover phase using a bit pattern for OB handover.
- Applications of PC1 include laptops or power tools.
- the PC2 standard relates to wireless power transmitters and receivers that provide guaranteed power of 200W to 2kW, and its applications include kitchen appliances.
- PCs can be distinguished according to power levels, and whether or not compatibility between identical PCs is supported may be optional or mandatory.
- compatibility between identical PCs means that power can be transmitted and received between identical PCs.
- compatibility between different PCs may also be supported.
- compatibility between different PCs means that power can be transmitted and received between different PCs.
- a wireless power transmitter of PC x can charge a wireless power receiver of PC y, it can be considered that compatibility between different PCs is maintained.
- a wireless power receiver of the lap-top charging method which can be stably charged only when power is continuously transmitted, is a wireless power transmitter of the same PC.
- a wireless power transmitter of the same PC there may be a problem in stably receiving power from a power tool type wireless power transmitter that transmits power discontinuously.
- the wireless power receiver may There is a risk of breakage. As a result, it is difficult to use the PC as an indicator/standard for representing/indicating compatibility.
- Wireless power transmission and reception devices can provide a very convenient user experience and interface (UX/UI). That is, a smart wireless charging service can be provided.
- the smart wireless charging service can be implemented based on the UX/UI of a smart phone including a wireless power transmitter.
- the interface between the smartphone's processor and the wireless charging receiver allows "drop and play" bi-directional communication between the wireless power transmitter and receiver.
- a user may experience a smart wireless charging service in a hotel.
- the wireless charger transmits wireless power to the smartphone and the smartphone receives wireless power.
- the wireless charger transmits information about the smart wireless charging service to the smartphone.
- the smart phone detects that it is located on the wireless charger, detects the reception of wireless power, or the smart phone receives information about the smart wireless charging service from the wireless charger, the smart phone gives the user consent as an additional feature ( Enter into the state of inquiring about opt-in.
- the smartphone may display a message on the screen in a manner that includes or does not include an alarm sound.
- An example of the message may include a phrase such as “Welcome to ### hotel. Select “Yes” to activate smart charging functions: Yes
- the smartphone receives the user's input of selecting Yes or No Thanks, and performs the next procedure selected by the user. If Yes is selected, the smartphone transmits the corresponding information to the wireless charger. And smart phones and wireless chargers perform smart charging functions together.
- a smart wireless charging service may also include receiving auto-filled WiFi credentials.
- the wireless charger transmits the WiFi qualification to the smartphone, and the smartphone automatically enters the WiFi qualification received from the wireless charger by running an appropriate app.
- the smart wireless charging service may also include running a hotel application providing hotel promotions, remote check-in/check-out and obtaining contact information.
- a user may experience a smart wireless charging service in a vehicle.
- the wireless charger transmits wireless power to the smart phone and the smart phone receives the wireless power.
- the wireless charger transmits information about the smart wireless charging service to the smart phone.
- the smartphone detects that it is placed on the wireless charger, detects the reception of wireless power, or receives information about the smart wireless charging service from the wireless charger, the smartphone prompts the user for identity verification. Enter into inquiry state.
- the smartphone automatically connects to the car via WiFi and/or Bluetooth.
- a smartphone may display a message on the screen with or without an alarm sound.
- An example of the message may include a phrase such as “Welcome to your car. Select “Yes” to synch device with in-car controls: Yes
- the smartphone receives the user's input of selecting Yes or No Thanks, and performs the next procedure selected by the user. If Yes is selected, the smartphone transmits the corresponding information to the wireless charger.
- smart phones and wireless chargers can perform in-vehicle smart control functions together by driving in-vehicle application/display software. The user can enjoy the desired music and check regular map locations.
- the in-vehicle application/display software may include capabilities to provide synchronized access for pedestrians.
- users can experience smart wireless charging at home.
- the wireless charger transmits wireless power to the smart phone and the smart phone receives the wireless power.
- the wireless charger transmits information about the smart wireless charging service to the smartphone.
- the smart phone detects that it is located on the wireless charger, detects the reception of wireless power, or the smart phone receives information about the smart wireless charging service from the wireless charger, the smart phone gives the user consent as an additional feature ( Enter into the state of inquiring about opt-in.
- the smartphone may display a message on the screen in a manner that includes or does not include an alarm sound.
- An example of the message may include a phrase such as “Hi xxx, Would you like to activate night mode and secure the building?: Yes
- the smartphone receives the user's input of selecting Yes or No Thanks, and performs the next procedure selected by the user. If Yes is selected, the smartphone transmits the corresponding information to the wireless charger. Smartphones and wireless chargers can at least recognize user patterns and encourage users to lock doors and windows, turn off lights, or set alarms.
- a 'profile' will be newly defined as an index/standard representing/indicating compatibility. That is, it can be interpreted that compatibility is maintained between wireless power transmission and reception devices having the same 'profile' and stable power transmission and reception is possible, and power transmission and reception is impossible between wireless power transmission and reception devices having different 'profiles'.
- Profiles can be defined independently of (or independently of) power classes for compatibility and/or according to applications.
- Profiles can be largely divided into three categories: i) mobile and computing, ii) electric tools, and iii) kitchen.
- the profile can be largely divided into four categories: i) mobile, ii) electric tool, iii) kitchen, and iv) wearable.
- the PC can be defined as PC0 and/or PC1, the communication protocol/method as IB and OB, and the operating frequency as 87-205kHz.
- Examples of applications include smartphones and laptop-tops.
- the PC may be defined as PC1, the communication protocol/method as IB, and the operating frequency as 87 to 145kHz, and examples of applications may include electric tools.
- the PC may be defined as PC2, the communication protocol/method as NFC-based, and the operating frequency as less than 100 kHz, and examples of applications may include kitchen/home appliances.
- NFC communication may be used between the wireless power transmitter and receiver.
- the wireless power transmitter and receiver can confirm that they are NFC devices with each other by exchanging WPC NDEF (NFC Data Exchange Profile Format).
- WPC NDEF NFC Data Exchange Profile Format
- FIG. 4 is a block diagram of a wireless power transmission system according to an embodiment.
- the wireless power transmission system 10 includes a mobile device 450 that wirelessly receives power and a base station 400 that wirelessly transmits power.
- the base station 400 is a device that provides inductive power or resonant power, and may include at least one wireless power transmitter 100 and a system circuit 405 .
- the wireless power transmitter 100 may transmit inductive power or resonant power and control the transmission.
- the wireless power transmitter 100 includes a power conversion circuit 110 that converts electrical energy into a power signal by generating a magnetic field through a primary coil(s) and delivering power at an appropriate level It may include a communication/control circuit (communications & control circuit, 120) for controlling communication and power transmission with the wireless power receiver 200 so as to
- the system circuit 405 may perform other operation control of the base station 400, such as input power provisioning, control of a plurality of wireless power transmitters, and user interface control.
- the primary coil may generate an electromagnetic field using AC power (or voltage or current).
- the primary coil receives AC power (or voltage or current) of a specific frequency output from the power conversion circuit 110, and thus generates a magnetic field of a specific frequency.
- the magnetic field may be generated in a nonradiative or radial manner, and the wireless power receiver 200 receives it to generate current. In other words, the primary coil transmits power wirelessly.
- the primary and secondary coils may have any suitable shapes, and may be, for example, copper wire wound around a formation of high permeability such as ferrite or an amorphous metal.
- the primary coil may also be called a transmitting coil, a primary core, a primary winding, a primary loop antenna, or the like.
- the secondary coil may also be called a receiving coil, a secondary core, a secondary winding, a secondary loop antenna, a pickup antenna, and the like. .
- the primary coil and the secondary coil may be provided in the form of a primary resonance antenna and a secondary resonance antenna, respectively.
- the resonance antenna may have a resonance structure including a coil and a capacitor.
- the resonant frequency of the resonant antenna is determined by the inductance of the coil and the capacitance of the capacitor.
- the coil may be formed in the form of a loop.
- a core may be disposed inside the loop.
- the core may include a physical core such as a ferrite core or an air core.
- the resonance phenomenon refers to a phenomenon in which, when a near field corresponding to a resonance frequency is generated in one resonance antenna and another resonance antenna is located nearby, both resonance antennas are coupled to each other and energy transfer occurs with high efficiency between the resonance antennas. .
- a magnetic field corresponding to the resonance frequency is generated between the primary resonance antenna and the secondary resonance antenna, a phenomenon in which the primary resonance antenna and the secondary resonance antenna resonate with each other occurs.
- the magnetic field generated by the primary resonance antenna The magnetic field is focused toward the secondary resonance antenna with higher efficiency than when radiated into the free space, and thus energy can be transferred from the primary resonance antenna to the secondary resonance antenna with high efficiency.
- the magnetic induction method may be implemented similarly to the magnetic resonance method, but in this case, the frequency of the magnetic field does not need to be the resonant frequency. Instead, in the magnetic induction method, matching between the loops constituting the primary coil and the secondary coil is required, and the distance between the loops must be very close.
- the wireless power transmitter 100 may further include a communication antenna.
- the communication antenna may transmit and receive communication signals using a communication carrier other than magnetic field communication.
- the communication antenna may transmit and receive communication signals such as Wi-Fi, Bluetooth, Bluetooth LE, ZigBee, and NFC.
- the communication/control circuit 120 may transmit and receive information to and from the wireless power receiver 200 .
- the communication/control circuit 120 may include at least one of an IB communication module and an OB communication module.
- the IB communication module may transmit and receive information using a magnetic wave having a specific frequency as a center frequency.
- the communication/control circuit 120 performs in-band communication by transmitting communication information on the operating frequency of wireless power transmission through a primary coil or receiving an operating frequency containing information through a primary coil. can do.
- a modulation method such as binary phase shift keying (BPSK), frequency shift keying (FSK), or amplitude shift keying (ASK) and Manchester coding or non-zero return level (NZR) -L (non-return-to-zero level) coding, etc., can be used to contain information in magnetic waves or to interpret magnetic waves containing information.
- BPSK binary phase shift keying
- FSK frequency shift keying
- ASK amplitude shift keying
- NZR non-zero return level
- the communication/control circuit 120 can transmit and receive information up to a distance of several meters at a data rate of several kbps.
- the OB communication module may perform out-band communication through a communication antenna.
- the communication/control circuit 120 may be provided as a short-range communication module.
- Examples of the short-distance communication module include communication modules such as Wi-Fi, Bluetooth, Bluetooth LE, ZigBee, and NFC.
- the communication/control circuit 120 may control overall operations of the wireless power transmitter 100 .
- the communication/control circuit 120 may perform calculations and processing of various information and control each component of the wireless power transmitter 100.
- the communication/control circuit 120 may be implemented in a computer or similar device using hardware, software, or a combination thereof.
- the communication/control circuit 120 may be provided in the form of an electronic circuit that performs a control function by processing electrical signals, and in terms of software, it is in the form of a program that drives the communication/control circuit 120 in hardware. can be provided.
- the communication/control circuit 120 may control transmit power by controlling an operating point.
- the operating point to control may correspond to a combination of frequency (or phase), duty cycle, duty ratio and voltage amplitude.
- the communication/control circuit 120 may control transmission power by adjusting at least one of a frequency (or phase), a duty cycle, a duty ratio, and a voltage amplitude.
- the wireless power transmitter 100 may supply constant power
- the wireless power receiver 200 may control the received power by controlling a resonant frequency.
- the wireless power transmitter 100 may be classified, for example, in terms of power transmission amount.
- the wireless power transmitter 100 supporting a wireless power transmission amount of up to 5 W is, for example, a type A wireless power transmitter 100 and a type It can be classified as B (type B) wireless power transmitters 100, and the wireless power transmitter 100 supporting a wireless power transmission amount of up to 15 W (ie, the wireless power transmitter 100 supporting the EPP protocol)
- the wireless power transmitter 100 supporting the EPP protocol For example, it may be classified into a type MP-A wireless power transmitter 100 and a type MP-B wireless power transmitter 100.
- the type A and type MP A wireless power transmitter 100 may have one or more primary coils. Since the type A and type MP A wireless power transmitters 100 activate a single primary coil at a time, a single primary cell matching the activated primary coil can be used.
- Type B and Type MP B power transmitters may have a primary coil array. And, Type B and Type MP B power transmitters can enable free positioning. To this end, Type B and Type MP B power transmitters can activate one or more primary coils in the array to realize primary cells at different locations on the interface surface.
- the mobile device 450 receives, stores, and supplies the power received from the wireless power receiver 200 and the wireless power receiver 200 that receives wireless power through the secondary coil. It includes a load (load, 455) that does.
- the wireless power receiver 200 may include a power pick-up circuit 210 and a communication/control circuit 220.
- the power pickup circuit 210 may receive wireless power through a secondary coil and convert it into electrical energy.
- the power pickup circuit 210 rectifies the AC signal obtained through the secondary coil and converts it into a DC signal.
- the communication/control circuit 220 may control transmission and reception of wireless power (transmission and reception of power).
- the secondary coil may receive wireless power transmitted from the wireless power transmitter 100 .
- the secondary coil may receive power using a magnetic field generated by the primary coil.
- the specific frequency is a resonant frequency
- a magnetic resonance phenomenon occurs between the primary coil and the secondary coil, so that power can be received more efficiently.
- the communication/control circuit 220 may further include a communication antenna.
- the communication antenna may transmit and receive communication signals using a communication carrier other than magnetic field communication.
- the communication antenna may transmit and receive communication signals such as Wi-Fi, Bluetooth, Bluetooth LE, ZigBee, and NFC.
- the communication/control circuit 220 may transmit and receive information to and from the wireless power transmitter 100 .
- the communication/control circuit 220 may include at least one of an IB communication module and an OB communication module.
- the IB communication module may transmit and receive information using a magnetic wave having a specific frequency as a center frequency.
- the communication/control circuit 220 may perform IB communication by carrying information on magnetic waves and transmitting them through a secondary coil or receiving magnetic waves containing information through a secondary coil.
- a modulation method such as binary phase shift keying (BPSK), frequency shift keying (FSK), or amplitude shift keying (ASK) and Manchester coding or non-zero return level (NZR) -L: It is possible to contain information in magnetic waves or interpret magnetic waves containing information by using a coding method such as non-return-to-zero level (L) coding.
- BPSK binary phase shift keying
- FSK frequency shift keying
- ASK amplitude shift keying
- NZR non-zero return level
- L non-return-to-zero level
- the OB communication module may perform out-band communication through a communication antenna.
- the communication/control circuit 220 may be provided as a short-range communication module.
- Examples of the short-distance communication module include communication modules such as Wi-Fi, Bluetooth, Bluetooth LE, ZigBee, and NFC.
- the communication/control circuit 220 may control overall operations of the wireless power receiver 200 .
- the communication/control circuit 220 may perform calculation and processing of various types of information and control each component of the wireless power receiver 200 .
- the communication/control circuit 220 may be implemented in a computer or similar device using hardware, software, or a combination thereof.
- the communication/control circuit 220 may be provided in the form of an electronic circuit that performs a control function by processing electrical signals, and in terms of software, it is in the form of a program that drives the communication/control circuit 220 in hardware. can be provided.
- the communication/control circuit 120 and the communication/control circuit 220 are Bluetooth or Bluetooth LE as an OB communication module or a short-range communication module
- the communication/control circuit 120 and the communication/control circuit 220 are respectively shown in FIG. 5 It can be implemented and operated in the same communication architecture.
- FIG. 5 is a diagram illustrating an example of a Bluetooth communication architecture to which an embodiment according to the present specification may be applied.
- FIG. 5 shows an example of a Bluetooth BR (Basic Rate)/EDR (Enhanced Data Rate) protocol stack supporting GATT, and (b) is a Bluetooth LE (Low Energy) protocol stack.
- a Bluetooth BR Basic Rate
- EDR Enhanced Data Rate
- B Bluetooth LE
- the Bluetooth BR/EDR protocol stack is based on the host controller interface (HCI) 18, the controller stack (460) on the top and the bottom A Host Stack (470) may be included.
- the host stack (or host module) 470 refers to a wireless transmission/reception module receiving a 2.4 GHz Bluetooth signal and hardware for transmitting or receiving Bluetooth packets, and the controller stack 460 is connected to the Bluetooth module to operate the Bluetooth module. control and act.
- the host stack 470 may include a BR/EDR PHY layer 12, a BR/EDR baseband layer 14, and a link manager layer 16.
- the BR/EDR PHY layer 12 is a layer that transmits and receives 2.4 GHz radio signals, and can transmit data by hopping 79 RF channels when using Gaussian Frequency Shift Keying (GFSK) modulation.
- GFSK Gaussian Frequency Shift Keying
- the BR/EDR baseband layer 14 is responsible for transmitting a digital signal, selects a channel sequence hopping 1400 times per second, and transmits a 625us long time slot for each channel.
- the link manager layer 16 controls overall operations (link setup, control, and security) of a Bluetooth connection by utilizing Link Manager Protocol (LMP).
- LMP Link Manager Protocol
- the link manager layer 16 may perform the following functions.
- the host controller interface layer 18 provides an interface between a host module and a controller module so that the host can provide commands and data to the controller, and the controller can provide events and data to the host.
- the host stack (or host module, 20) includes a logical link control and adaptation protocol (L2CAP, 21), an attribute protocol (Protocol, 22), a generic attribute profile (GATT, 23), and a generic access profile (Generic Access Profile, GAP, 24) and BR/EDR profile (25).
- L2CAP logical link control and adaptation protocol
- Protocol 22
- GATT generic attribute profile
- GAP Generic Access Profile
- BR/EDR profile BR/EDR profile
- the logical link control and adaptation protocol may provide one bi-directional channel for transmitting data to a specific protocol or profile.
- the L2CAP 21 can multiplex various protocols and profiles provided by Bluetooth.
- L2CAP of Bluetooth BR/EDR uses dynamic channel, supports protocol service multiplexer, retransmission, and streaming mode, and provides segmentation and reassembly, per-channel flow control, and error control.
- the generic attribute profile may be operable as a protocol describing how the attribute protocol 22 is used in the configuration of services.
- the generic attribute profile 23 may be operable to specify how ATT attributes are grouped together into services, and may be operable to describe characteristics associated with services.
- the Generic Attribute Profile 23 and the Attribute Protocol can use features to describe the status and services of a device, how features relate to each other and how they are used.
- the attribute protocol 22 and the BR/EDR profile 25 define a service (profile) using Bluetooth BR/EDR and an application protocol for exchanging these data, and the generic access profile (Generic Access Profile, GAP, 24) defines device discovery, connection, and security levels.
- GAP Global System for Mobile communications
- the Bluetooth LE protocol stack includes a controller stack (480) operable to process the timing-critical radio interface and a host stack operable to process high level data. (Host stack, 490).
- controller stack 480
- host stack operable to process high level data.
- the controller stack 480 may be implemented using a communication module that may include a Bluetooth radio, for example, a processor module that may include a processing device such as a microprocessor.
- the host stack 490 may be implemented as part of an OS running on the processor module or as an instantiation of a package on the OS.
- a controller stack and a host stack may operate or run on the same processing device within a processor module.
- the controller stack 480 includes a physical layer (PHY) 32, a link layer (34), and a host controller interface (36).
- PHY physical layer
- link layer 34
- host controller interface 36
- the physical layer (PHY, wireless transmission/reception module, 32) is a layer that transmits and receives a 2.4 GHz radio signal and uses GFSK (Gaussian Frequency Shift Keying) modulation and a frequency hopping technique consisting of 40 RF channels.
- GFSK Gausian Frequency Shift Keying
- the link layer 34 which transmits or receives Bluetooth packets, creates a connection between devices after performing advertising and scanning functions using 3 advertising channels, and transmits data packets of up to 257 bytes through 37 data channels. It provides the ability to send and receive.
- the host stack includes Generic Access Profile (GAP) 40, Logical Link Control and Adaptation Protocol (L2CAP, 41), Security Manager (SM, 42), Attribute Protocol (ATT, 440), and Generic Attribute Profile. (Generic Attribute Profile, GATT, 44), generic access profile (Generic Access Profile, 25), and LT profile (46).
- GAP Generic Access Profile
- L2CAP Logical Link Control and Adaptation Protocol
- SM Security Manager
- ATT Attribute Protocol
- GATT Generic Attribute Profile
- GATT Generic Attribute Profile
- GATT Generic Attribute Profile
- GATT Generic Access Profile
- the host stack 490 is not limited thereto and may include various protocols and profiles.
- the host stack uses L2CAP to multiplex various protocols and profiles provided by Bluetooth.
- Logical Link Control and Adaptation Protocol (L2CAP) 41 may provide one bi-directional channel for transmitting data to a specific protocol or profile.
- the L2CAP 41 may be operable to multiplex data between higher layer protocols, segment and reassemble packages, and manage multicast data transmission.
- Bluetooth LE three fixed channels (one for signaling CH, one for Security Manager, and one for Attribute protocol) are basically used.
- a dynamic channel may be used as needed.
- BR/EDR Base Rate/Enhanced Data Rate
- a dynamic channel is basically used, and protocol service multiplexer, retransmission, streaming mode, etc. are supported.
- a Security Manager (SM) 42 is a protocol for authenticating devices and providing key distribution.
- ATT Attribute Protocol, 43
- ATT has the following 6 message types (Request, Response, Command, Notification, Indication, Confirmation).
- the Request message is a message for requesting and delivering specific information from the client device to the server device
- the Response message is a response message to the Request message, which can be used to transmit from the server device to the client device.
- Command message This is a message transmitted from the client device to the server device mainly to instruct a specific operation command.
- the server device does not transmit a response to the command message to the client device.
- Notification message This is a message sent from the server device to the client device to notify such as an event.
- the client device does not transmit a confirmation message for the notification message to the server device.
- Indication and Confirm message This is a message sent from the server device to the client device to notify such as an event. Unlike the notification message, the client device transmits a confirmation message for the indication message to the server device.
- a value for the data length is transmitted so that the client can clearly know the data length, and the UUID is used to obtain a characteristic from the server value can be transmitted.
- the general access profile (GAP) 45 is a newly implemented layer for Bluetooth LE technology, and is used to control how role selection and multi-profile operations for communication between Bluetooth LE devices occur.
- the general access profile 45 is mainly used for device discovery, connection creation, and security procedures, defines a method of providing information to the user, and defines the following attribute types.
- the LE profiles 46 are profiles dependent on GATT and are mainly applied to Bluetooth LE devices.
- the LE profile 46 may include, for example, Battery, Time, FindMe, Proximity, Time, and the like, and details of the GATT-based Profiles are as follows.
- the generic attribute profile may be operable as a protocol describing how the attribute protocol 43 is used in the configuration of services.
- the generic attribute profile 44 may be operable to specify how ATT attributes are grouped together into services, and may be operable to describe characteristics associated with services.
- the Generic Attribute Profile 44 and the Attribute Protocol can use features to describe the status and services of a device, how they relate to each other and how they are used.
- the BLE procedure may be divided into a device filtering procedure, an advertising procedure, a scanning procedure, a discovering procedure, and a connecting procedure.
- the device filtering procedure is a method for reducing the number of devices performing responses to requests, instructions, notifications, etc. in the controller stack.
- the controller stack can control the BLE controller stack to reduce power consumption by reducing the number of requests sent.
- An advertising device or a scanning device may perform the above device filtering procedure to restrict devices receiving advertising packets, scan requests, or connection requests.
- the advertisement device refers to a device that transmits an advertisement event, that is, performs an advertisement, and is also referred to as an advertiser.
- a scanning device refers to a device that performs scanning and a device that transmits a scan request.
- a scanning device when a scanning device receives some advertising packets from an advertising device, the scanning device should send a scan request to the advertising device.
- the scanning device may ignore advertisement packets transmitted from the advertisement device.
- a device filtering procedure may also be used in the connection request process. If device filtering is used in the connection request process, it is not necessary to transmit a response to the connection request by ignoring the connection request.
- the advertising device performs an advertising procedure to perform non-directional broadcasting to devices within the area.
- undirected advertising is advertising directed to all (all) devices rather than broadcast to a specific device, and all devices scan advertising to request additional information or You can request a connection.
- a device designated as a receiving device may scan for advertising and request additional information or connection.
- the advertising procedure is used to establish a Bluetooth connection with a nearby initiating device.
- the advertising procedure may be used to provide periodic broadcast of user data to scanning devices that are listening on the advertising channel.
- all advertisements are broadcast through advertisement physical channels.
- Advertising devices may receive scan requests from listening devices that are listening to obtain additional user data from the advertising device.
- the advertising device transmits a response to the scan request to the device that sent the scan request through the same advertising physical channel as the advertising physical channel that received the scan request.
- Broadcast user data sent as part of advertisement packets is dynamic data, whereas scan response data is generally static data.
- An advertising device may receive a connection request from an initiating device on an advertising (broadcast) physical channel. If the advertising device uses a connectable advertising event and the initiating device is not filtered by the device filtering procedure, the advertising device stops advertising and enters a connected mode. The advertising device may start advertising again after the connection mode.
- a device that performs scanning that is, a scanning device performs a scanning procedure to listen to a non-directional broadcast of user data from advertising devices using an advertising physical channel.
- the scanning device transmits a scan request to the advertising device through an advertising physical channel to request additional data from the advertising device.
- the advertising device transmits a scan response, which is a response to the scan request, including additional data requested by the scanning device through the advertising physical channel.
- the scanning procedure may be used while being connected to another BLE device in a BLE piconet.
- the scanning device If the scanning device receives a broadcast advertising event and is in an initiator mode capable of initiating a connection request, the scanning device transmits a connection request to the advertising device through the advertising physical channel, thereby and start a Bluetooth connection.
- the scanning device When the scanning device sends a connection request to the advertising device, the scanning device stops initiator mode scanning for additional broadcasting and enters a connection mode.
- 'Bluetooth devices' Devices capable of Bluetooth communication (hereinafter, referred to as 'Bluetooth devices') perform advertising procedures and scanning procedures to discover nearby devices or to be discovered by other devices within a given area.
- the discovery procedure is performed asymmetrically.
- a Bluetooth device trying to find other nearby devices is called a discovering device, and listens to find devices that advertise scannable advertisement events.
- a Bluetooth device discovered and available from other devices is called a discoverable device, and actively broadcasts an advertisement event through an advertisement (broadcast) physical channel so that other devices can scan it.
- Both the discovering device and the discoverable device may already be connected to other Bluetooth devices in the piconet.
- connection procedure is asymmetric, and the connection procedure requires that another Bluetooth device perform a scanning procedure while a specific Bluetooth device performs an advertising procedure.
- connection After receiving an accessible advertising event from the advertising device, connection may be initiated by transmitting a connection request to the advertising device through an advertising (broadcast) physical channel.
- the Link Layer enters the advertised state, at the direction of the host (stack).
- the link layer transmits advertising Packet Data Circuits (PDUs) in advertising events.
- PDUs Packet Data Circuits
- Each advertising event consists of at least one advertising PDU, and the advertising PDUs are transmitted through the used advertising channel indices.
- the advertising event may be terminated when the advertising PDU is transmitted through each of the advertising channel indexes used, or the advertising event may be terminated earlier if the advertising device needs to secure space for performing other functions.
- the link layer enters the scanning state at the direction of the host (stack). In the scanning state, the link layer listens for advertising channel indices.
- scanning states There are two types of scanning states: passive scanning and active scanning, and each scanning type is determined by the host.
- a separate time or advertising channel index for performing scanning is not defined.
- the link layer listens for an advertising channel index during the scanWindow duration.
- the scanInterval is defined as the interval (interval) between the starting points of two consecutive scan windows.
- the link layer has to scan different advertising channel indices.
- the link layer uses all available advertising channel indices.
- the link layer When passive scanning, the link layer only receives packets and does not transmit any packets.
- the link layer listens to the advertising device for advertising PDUs and depending on the advertising PDU type it can request additional information about the advertising device.
- the link layer enters the initiation state at the direction of the host (stack).
- the link layer listens for advertising channel indices.
- the link layer listens to the advertising channel index during the scan window period.
- the link layer enters the connected state when the device making the connection request, that is, when the initiating device sends a CONNECT_REQ PDU to the advertising device or when the advertising device receives a CONNECT_REQ PDU from the initiating device.
- connection After entering the connected state, the connection is considered to be created. However, it need not be considered to be established at the time when the connection enters the connected state. The only difference between a newly created connection and an established connection is the link layer connection supervision timeout value.
- a link layer performing a master role is called a master, and a link layer performing a slave role is called a slave.
- the master controls the timing of the connection event, and the connection event refers to the timing of synchronization between the master and the slave.
- the Link Layer has only one packet format used for both Advertising Channel Packets and Data Channel Packets.
- Each packet consists of four fields: Preamble, Access Address, PDU, and CRC.
- the PDU When one packet is transmitted on the advertising channel, the PDU will be an advertising channel PDU, and when one packet is transmitted on the data channel, the PDU will be a data channel PDU.
- An advertising channel PDU Packet Data Circuit
- PDU Packet Data Circuit
- the PDU type field of the advertising channel PDU included in the header indicates the PDU type as defined in Table 1 below.
- the advertising channel PDU types below are referred to as advertising PDUs and are used in specific events.
- ADV_IND chainable non-directional advertising event
- ADV_DIRECT_IND directive advertising events that can be chained
- ADV_NONCONN_IND non-connectable non-direction advertising event
- ADV_SCAN_IND scannable non-directional ad event
- the PDUs are transmitted in the link layer in an advertising state and received by the link layer in a scanning state or initiating state.
- the advertising channel PDU type below is called a scanning PDU and is used in the conditions described below.
- SCAN_REQ Sent by the link layer in the scanning state and received by the link layer in the advertising state.
- SCAN_RSP Sent by the link layer in the advertising state and received by the link layer in the scanning state.
- the advertising channel PDU type below is called an initiation PDU.
- CONNECT_REQ Sent by the link layer in the initiating state and received by the link layer in the advertising state.
- a data channel PDU has a 16-bit header, payloads of various sizes, and may include a Message Integrity Check (MIC) field.
- MIC Message Integrity Check
- the load 455 may be a battery.
- the battery may store energy using power output from the power pickup circuit 210 .
- a battery is not necessarily included in the mobile device 450 .
- the battery may be provided as a detachable external component.
- the wireless power receiver 200 may include a driving means for driving various operations of the electronic device instead of a battery.
- the mobile device 450 is shown to include the wireless power receiver 200, and the base station 400 is shown to include the wireless power transmitter 100, but in a broad sense, the wireless power receiver ( 200 may be identified with the mobile device 450, and the wireless power transmitter 100 may be identified with the base station 400.
- wireless power transmission including the communication/control circuit 120 may be represented by a simplified block diagram as shown in FIG. 6 .
- FIG. 6 is a block diagram illustrating a wireless power transmission system using BLE communication according to an example.
- the wireless power transmitter 100 includes a power conversion circuit 110 and a communication/control circuit 120.
- the communication/control circuit 120 includes an in-band communication module 121 and a BLE communication module 122.
- the wireless power receiver 200 includes a power pickup circuit 210 and a communication/control circuit 220.
- the communication/control circuit 220 includes an in-band communication module 221 and a BLE communication module 222.
- the BLE communication modules 122 and 222 perform the architecture and operation according to FIG. 5 .
- the BLE communication modules 122 and 222 may be used to establish a connection between the wireless power transmitter 100 and the wireless power receiver 200 and to exchange control information and packets required for wireless power transmission there is.
- the communication/control circuitry 120 may be configured to operate a profile for wireless charging.
- the profile for wireless charging may be GATT using BLE transmission.
- FIG. 7 is a block diagram illustrating a wireless power transmission system using BLE communication according to another example.
- the communication/control circuits 120 and 220 include only the in-band communication modules 121 and 221, respectively, and the BLE communication modules 122 and 222 include the communication/control circuits 120 and 222, respectively. 220) is also possible.
- a coil or a coil unit may be referred to as a coil assembly, a coil cell, or a cell including a coil and at least one element close to the coil.
- the wireless power transmitter 100 and the wireless power receiver 200 communicate for the purpose of configuring and controlling power transmission.
- the power signal may provide a carrier for all communications, and a protocol for communications may be composed of several steps.
- the communication protocol will be described.
- FIG. 8 is a state transition diagram for explaining a wireless power transmission procedure.
- BPP Baseline protocol
- EPP Extended protocol
- FOD foreign object detection
- the power transmission operation between the wireless power transmitter 100 and the wireless power receiver 200 includes a ping phase 810 (Ping Phase) and a configuration phase 820. It may be divided into a configuration phase, a negotiation phase 830 (Negotiation Phase), and a power transfer phase.
- the wireless power transmitter 100 may attempt to establish communication with the wireless power receiver 200. Before attempting to establish communication, measurements may be taken, which may determine if there are any objects such as bank cards, coins, or other metals that may be damaged or heated during power transfer. Here, this measurement may be performed without waking up the wireless power receiver 200 .
- the wireless power transmitter 100 obtains design information from the wireless power receiver 200 and then concludes whether the detected metal is a foreign object or a friendly metal in the negotiation phase. (830) can be postponed.
- the wireless power receiver 200 may send basic identification and configuration data to the wireless power receiver 200.
- both the wireless power transmitter 100 and the wireless power receiver 200 may generate a baseline power transfer contract using this information.
- the wireless power transmitter 100 and the wireless power receiver 200 may determine whether to continue the baseline protocol or the extended protocol in the configuration phase 820 .
- the wireless power receiver 200 may use functions such as enhanced FOD, data transport stream, and authentication only when implementing an extended protocol.
- the wireless power transmitter 100 and the wireless power receiver 200 may establish an extended power transfer contract including additional settings and restrictions. Also, the wireless power receiver 200 may provide design information to the wireless power transmitter 100 . Later, the design information can be used to complete the FOD before transitioning to power delivery phase 840 .
- the negotiation phase 830 may correspond to a phase that does not exist in the baseline protocol.
- the power delivery phase 840 may be a phase in which power is delivered to the load of the wireless power receiver 200 .
- the wireless power transmitter 100 and the wireless power receiver 200 may perform system calibration when this step starts. This step may occasionally be interrupted to renegotiate elements of the power delivery contract. However, power delivery may continue during this renegotiation.
- the wireless power transmitter 100 does not yet know whether the wireless power receiver 200 is within the operating volume. In addition, the wireless power transmitter 100 cannot recognize the wireless power receiver 200. For that reason, this system is usually inactive due to lack of power signal.
- the wireless power transmitter 100 may go through the following steps.
- the wireless power transmitter 100 may perform analog ping (S910). That is, the wireless power transmitter 100 may transmit an analog ping to determine whether an object exists in an operating volume. For example, the wireless power transmitter may detect whether an object exists within the operating space based on a current change of a transmission coil or a primary coil.
- the wireless power transmitter 100 may apply NFC tag protection (S920).
- NFC tag protection may be performed through the following procedure.
- the wireless power transmitter 100 determines that the NFC tag cannot withstand the power signal, the digital ping is not started and the ping phase is maintained, and the wireless power transmitter 100 may inform the user of the reason why it cannot continue there is.
- the wireless power transmitter 100 may detect foreign matter (S930). That is, the wireless power transmitter 100 may collect information that is helpful in determining whether foreign substances other than the wireless power receiver 200 exist. To this end, the wireless power transmitter 100 may use various methods such as a pre-power FOD method.
- the radio power receiver may not operate.
- the wireless power transmitter 100 may start digital ping (S940).
- the digital ping may request a response such as a signal strength (SIG) data packet or an end power transfer (EPT) data packet from the wireless power receiver 200 .
- SIG signal strength
- EPT end power transfer
- the wireless power transmitter 100 may receive SIG or EPT from the wireless power receiver 200 (S950).
- the SIG data packet may provide a measurement of coupling, and the SIG data packet may include information about a signal strength value.
- the EPT data packet may provide a request for stopping power transmission and a reason for the request.
- the wireless power transmitter 100 stays in the ping phase 810 and repeats the above steps.
- the configuration phase 820 is part of the protocol as follows.
- the wireless power receiver 200 may identify itself to the wireless power transmitter 100.
- the wireless power receiver 200 and the wireless power transmitter 100 may establish a baseline power transfer contract.
- the wireless power receiver 200 and the wireless power transmitter 100 may determine a protocol variant to be used for power transmission.
- the wireless power transmitter 100 and the wireless power receiver 200 may continue to operate using the digital ping parameter. This may mean that the power and current levels of both the wireless power transmitter 100 and the wireless power receiver 200 change only when the user moves the wireless power receiver 200 at a location within the operating volume.
- FIG. 10 schematically illustrates an example of the protocol of the configuration phase 820 .
- the wireless power transmitter 100 may receive identification (ID) from the wireless power receiver 200 (S1010).
- the wireless power transmitter 100 may also receive XID (extended identification) from the wireless power receiver 200 (S1020). That is, the wireless power receiver 200 may identify itself using an ID data packet and, optionally, an XID data packet.
- the wireless power transmitter 100 may selectively receive a power control hold-off (PCH) data packet from the wireless power receiver 200 (S1030), and the wireless power transmitter 100 may receive a CFG from the wireless power receiver 200.
- a data packet may be received (S1040). That is, the wireless power receiver 200 may provide data for use in a power transmission contract using PCH and/or CFG data packets.
- PCH power control hold-off
- the wireless power transmitter 100 may check the extended protocol if possible (S1050).
- the ID data packet may be information for identifying the wireless power receiver 200.
- the ID may include a manufacturer code, a basic device identifier, and the like.
- the ID may also include information for identifying the presence or absence of the XID data packet in the setting phase.
- XID data packets may contain additional identification data.
- the PCH data packet may constitute a delay between reception of the CE data packet and the wireless power transmitter 100 starting to adjust the coil current.
- the CFG data packet may provide basic configuration data.
- CFG data packets may provide all parameters governing power transfer in the baseline protocol.
- the CFG data packet can provide all FSK communication parameters used in the extended protocol.
- the CFG data packet may provide additional functions of the wireless power receiver 200.
- FIG. 11 is a diagram illustrating a message field of a configuration packet (CFG) of a wireless power receiver according to an embodiment.
- CFG configuration packet
- a configuration packet may have a header value of 0x51, and a message field of the configuration packet (CFG) includes a 1-bit authentication (AI) flag and a 1-bit outband (OB). ) flags may be included.
- AI authentication
- OB outband
- the authentication flag (AI) indicates whether the wireless power receiver supports the authentication function. For example, if the value of the authentication flag (AI) is '1', it indicates that the wireless power receiver supports an authentication function or can operate as an authentication initiator, and the value of the authentication flag (AI) is '0' may indicate that the wireless power receiver does not support the authentication function or cannot operate as an authentication initiator.
- the out-of-band (OB) flag indicates whether the wireless power receiver supports out-of-band communication. For example, if the value of the out-of-band (OB) flag is '1', the wireless power receiver instructs out-band communication, and if the value of the out-of-band (OB) flag is '0', the wireless power receiver performs out-of-band communication. can indicate that it does not support .
- ID and/or XID as described above is for identification.
- PCH and/or CFG is for building a power delivery contract.
- the negotiation phase 830 is a part of an extended protocol in which the wireless power transmitter 100 and the wireless power receiver 200 can change a power transmission contract. There are two types of this step.
- the negotiation phase 830 directly follows the configuration phase 820 and serves to create an initial extended power transfer contract.
- the negotiation phase 830 also serves to complete the pre-power FOD function.
- the length of the negotiation phase is not limited.
- the renegotiation phase may interrupt the power delivery phase 840 multiple times and generally serves to coordinate a single element of the power delivery contract.
- FOD/qf, FOD/rf and SRQ/rpr data packets may not be used in the renegotiation phase.
- the constraint on CE data packets in the power transfer phase 840 limits the length of the renegotiation phase.
- the power transfer contract related to the reception/transmission of wireless power between the wireless power receiver and the wireless power transmitter is expanded or changed, or at least some of the elements of the power transfer contract are adjusted. Renewal of a power transmission contract to be performed, or exchange of information for establishing out-of-band communication may be performed.
- FIG. 12 is a flowchart schematically illustrating a protocol of a negotiation step or a renegotiation step according to an embodiment.
- the wireless power transmitter 100 may receive an FOD status data packet (eg FOD) from the wireless power receiver 200 (S1210).
- FOD FOD status data packet
- the wireless power receiver 200 may inform the wireless power transmitter 100 of the influence of the presence of the FOD on the selected attribute of the reference wireless power transmitter 100 by using the FOD status data packet.
- the wireless power transmitter 100 may configure the FOD function using this information.
- the wireless power transmitter 100 may transmit ACK/NAK for the FOD status data packet to the wireless power receiver 200 (S1215).
- the wireless power receiver 200 may receive an identification data packet (ID), capabilities data packet (CAP), and extended CAP (XCAP) of the wireless power transmitter 100 by using a general request data packet (GRQ).
- ID identification data packet
- CAP capabilities data packet
- XCAP extended CAP
- the general request packet may have a header value of 0x07 and may include a 1-byte message field.
- a message field of the general request packet (GRQ) may include a header value of a data packet requested by the wireless power receiver 200 to the wireless power transmitter 100 using the GRQ packet.
- the wireless power receiver 200 may transmit a GRQ packet (GRQ/id) requesting an ID packet of the wireless power transmitter 100 to the wireless power transmitter 100 (S1220).
- GRQ/id GRQ/id
- the wireless power transmitter 100 may transmit an ID packet to the wireless power receiver 200 (S1225).
- the ID packet of the wireless power transmitter 100 includes information on 'Manufacturer Code'.
- the ID packet including information on the 'Manufacturer Code' enables identification of the manufacturer of the wireless power transmitter 100.
- the wireless power receiver 200 may transmit a GRQ packet (GRQ/cap) requesting a capability packet (CAP) of the wireless power transmitter 100 to the wireless power transmitter 100 ( S1230).
- GRQ/cap GRQ packet
- a message field of GRQ/cap may include a header value (0x31) of a performance packet (CAP).
- the wireless power transmitter 100 may transmit a capability packet (CAP) to the wireless power receiver 200 (S1235).
- CAP capability packet
- the wireless power receiver 200 may transmit a GRQ packet (GRQ/xcap) requesting a capability packet (CAP) of the wireless power transmitter 100 to the wireless power transmitter 100 ( S1240).
- GRQ/xcap may include the header value (0x32) of the performance packet (XCAP).
- the wireless power transmitter 100 may transmit a capability packet (XCAP) to the wireless power receiver 200 (S1245).
- XCAP capability packet
- FIG. 13 is a diagram illustrating a message field of a capability packet (CAP) of a wireless power transmitter according to an embodiment.
- CAP capability packet
- a capability packet (CAP) may have a header value of 0x31 and may include a message field of 3 bytes, referring to FIG. 19 .
- a 1-bit authentication (AR) flag and a 1-bit out-of-band (OB) flag may be included in the message field of the capability packet (CAP).
- the authentication flag AR indicates whether the wireless power transmitter 100 supports the authentication function. For example, if the value of the authentication flag (AR) is '1', it indicates that the wireless power transmitter 100 supports the authentication function or operates as an authentication responder, and the value of the authentication flag (AR) If this is '0', it may indicate that the wireless power transmitter 100 does not support the authentication function or cannot operate as an authentication responder.
- the out-of-band (OB) flag indicates whether the wireless power transmitter 100 supports out-of-band communication. For example, if the value of the out-of-band (OB) flag is '1', the wireless power transmitter 100 instructs out-of-band communication, and if the value of the out-of-band (OB) flag is '0', the wireless power transmitter 100 may indicate that out-of-band communication is not supported.
- the wireless power receiver 200 may receive the capability packet (CAP) of the wireless power transmitter 100 and check whether the wireless power transmitter 100 supports an authentication function and supports out-of-band communication.
- CAP capability packet
- the wireless power receiver 200 uses at least one specific request data packet (SRQ) in the negotiation phase or the renegotiation phase to form a power transfer contract related to power to be provided in the power transfer phase.
- Contract) elements can be updated (S1250), and ACK/NAK for this can be received (S1255).
- the wireless power receiver 200 transmits SRQ/en to the wireless power transmitter 100 (S1260), and receives an ACK from the wireless power transmitter 100 It can (S1265).
- the power delivery phase 840 is a part of a protocol in which actual power is transmitted to the load of the wireless power receiver 200 .
- power transfer may proceed according to the conditions of the power transfer contract generated in the negotiation phase 830 .
- the wireless power receiver 200 may control the power level by transmitting control error (CE) data measuring a deviation between a target and an actual operating point of the wireless power receiver 200 to the wireless power transmitter 100. there is.
- CE control error
- the wireless power transmitter 100 and the wireless power receiver 200 aim to make the control error data zero, at which point the system operates at the target power level.
- the wireless power transmitter 100 and the wireless power receiver 200 may exchange information to facilitate FOD.
- the wireless power receiver 200 regularly reports the amount of received power (received power level) to the wireless power transmitter 100, and the wireless power transmitter 100 determines whether or not a foreign substance is detected. The receiver 200 may be notified.
- a method that may be used for FOD in the power delivery phase may correspond to power loss calculation, for example.
- the wireless power transmitter 100 compares the received power level reported by the wireless power receiver 200 with the amount of transmit power (transmit power level) and when the difference exceeds a threshold value, the wireless power receiver 200 ) can be sent a signal (about whether foreign substances have been monitored).
- the wireless power transmitter 100 or the wireless power receiver 200 may request renegotiation of a power transmission contract during a power transfer phase.
- An example of a changed situation in which a renegotiation of a power transmission contract may occur may be as follows.
- the wireless power transmitter 100 and the wireless power receiver 200 may start a data transmission stream and exchange application level data throughout the power delivery phase 840 .
- the wireless power receiver 200 may want to check the credentials of the wireless power transmitter 100 to determine whether the wireless power transmitter 100 can be trusted to safely operate at a high power level. Having the proper credentials can mean that the compliance test has passed.
- the present specification may provide a method of starting power delivery at a low power level and controlling power to a higher level only after successfully completing an authentication protocol.
- FIG. 14 schematically illustrates a flow diagram of data flow for power transfer phase 840 in the baseline protocol.
- the wireless power receiver 200 may transmit CE to the wireless power transmitter 100 (S1410).
- the wireless power receiver 200 may generally transmit CE data packets several times per second.
- the wireless power receiver 200 may transmit a received power (RP) data packet (RP8 in the baseline protocol) to the wireless power transmitter 100 generally once every 1.5 seconds (S1420).
- RP received power
- the wireless power receiver 200 may transmit a charge status (CHS) data packet to the wireless power transmitter 100 (S1430).
- CHS charge status
- CE data packets can provide feedback on the desired power level.
- the CE data packet may include a control error value, where the control error value may be a signed integer value that is a relative measurement value for a deviation between an actual operating point and a target operating point of the wireless power receiver 200. . If the control error value at this time is a positive value, it indicates that the actual operating point is below the target operating point, and may request the wireless power transmitter 100 to increase the power signal. If the control error value is a negative value, it indicates that the actual operating point is above the target operating point, and the wireless power transmitter 100 may be requested to reduce the power signal.
- the RP8 data packet may report the received power level.
- the RP8 data packet may be included only in the baseline protocol.
- a CHS data packet can provide the charge level of the battery in the load.
- 15 schematically illustrates a flow diagram of data flow for power transfer phase 840 in the extended protocol.
- the wireless power receiver 200 may transmit CE to the wireless power transmitter 100 (S1510).
- the wireless power receiver 200 may generally transmit CE data packets several times per second.
- the wireless power receiver 200 may transmit a received power (RP) data packet (RP in the extended protocol) to the wireless power transmitter 100 generally once every 1.5 seconds (S1515).
- RP received power
- control error packet (CE) and the received power packet (RP) are data packets that must be repeatedly transmitted/received according to required timing constraints for wireless power control.
- the wireless power transmitter 100 may control the level of wireless power to be transmitted based on the control error packet (CE) and the received power packet (RP) received from the wireless power receiver 200 .
- CE control error packet
- RP received power packet
- the wireless power transmitter 100 may respond to the received power packet (RP) with a bit pattern such as ACK, NAK, or ATN (S1520).
- the wireless power transmitter 100 When the wireless power transmitter 100 responds with an ACK to the received power packet (RP/0) having a mode value of 0, it means that power transmission can continue at the current level.
- the wireless power transmitter 100 responds with an NAK to the received power packet (RP/0) having a mode value of 0, it means that the wireless power receiver 200 should reduce power consumption.
- the wireless power receiver 200 responds to the received power packet (RP/1 or RP/2) It means that the power correction value included in RP/2) has been accepted.
- the wireless power transmitter 100 responds with NAK to the received power packet (RP/1 or RP/2) having a mode value of 1 or 2, so that the wireless power receiver 200 receives the received power packet (RP/1 or RP/2). It means that the power correction value included in RP/2) was not accepted.
- the previously described received power packet (RP/1) with a mode value of 1 may mean a first calibration data point, and the received power packet (RP/2) with a mode value of 2 is additional calibration data. It may mean an additional calibration data point.
- the wireless power receiver may transmit a plurality of additional power correction values by transmitting a received power packet (RP/2) having a mode value of 2 to the wireless power transmitter several times, and the wireless power transmitter may transmit a plurality of additional power correction values.
- a calibration procedure may be performed based on the dog's RP/2.
- the wireless power transmitter 100 When the wireless power transmitter 100 responds to the received power packet (RP) with ATN, it means that the wireless power transmitter 100 requests permission of communication. That is, the wireless power transmitter 100 may transmit an attention (ATN) response pattern to request permission to transmit a data packet in response to the RP data packet. In other words, the wireless power transmitter 100 may request permission to transmit the data packet from the wireless power receiver 200 by transmitting ATN to the wireless power receiver 200 in response to the RP data packet.
- ATN attention
- the wireless power receiver 200 may transmit a charge status (CHS) data packet to the wireless power transmitter 100 (S1525).
- CHS charge status
- the wireless power transmitter 100 and the wireless power receiver 200 in order to initiate renegotiation for an element (generally guaranteed load power) in a power transmission contract, DSR (data stream response) data packet, CAP data packets, NEGO data packets can be exchanged.
- DSR data stream response
- the wireless power receiver 200 may transmit a DSR data packet to the wireless power transmitter 100 (S1530), and the wireless power transmitter 100 may transmit a CAP to the wireless power receiver 200 (S1535).
- the wireless power receiver 200 transmits a NEGO data packet to the wireless power transmitter 100 (S1540), and the wireless power transmitter 100 responds to the NEGO data packet. Can transmit an ACK to the wireless power receiver 200 Yes (S1545).
- i) 0x00-DSR/nak indicates that the last received data packet of the wireless power transmitter 100 is rejected.
- iii) 0x55-DSR/nd indicates that the last received data packet of the wireless power transmitter 100 was not expected.
- the CAP data packet provides information about the function of the wireless power transmitter 100. Details are as described above.
- the NEGO data packet may request the wireless power transmitter 100 to proceed to the renegotiation step.
- the wireless power transmitter 100 and the wireless power receiver 200 may use auxiliary data transport (ADC), auxiliary data transport (ADT), and DSR data packets to exchange application level data.
- ADC auxiliary data transport
- ADT auxiliary data transport
- DSR DSR data packets
- the wireless power receiver 200 may transmit ADC/ADT to the wireless power transmitter 100 (S1550), and the wireless power transmitter 100 accordingly In response, ACK/NAK may be transmitted to the wireless power receiver 200 (S1555).
- the wireless power receiver 200 may transmit DSR to the wireless power transmitter 100 (S1560), and the wireless power transmitter may transmit ADC/ADT to the wireless power receiver (S1565).
- the data transport stream serves to deliver application level data from the data stream initiator to the data stream responder.
- application level data can be largely classified into i) authentication application and ii) proprietary (general purpose) application.
- Messages/information related to authentication applications among application level data can be organized as follows.
- a message used in an authentication procedure is called an authentication message.
- Authentication messages are used to convey information related to authentication. There are two types of authentication messages. One is an authentication request and the other is an authentication response. An authentication request is sent by an authentication initiator, and an authentication response is sent by an authentication responder.
- the wireless power transmitter and receiver may be an authentication initiator or an authentication responder. For example, when the wireless power transmitter is an authentication initiator, the wireless power receiver becomes an authentication responder, and when the wireless power receiver is an authentication initiator, the wireless power transmitter becomes an authentication responder.
- the authentication request message includes GET_DIGESTS, GET_CERTIFICATE, and CHALLENGE.
- This request can be used to retrieve certificate chain digests.
- the wireless power receiver 200 may request a desired number of digests at one time.
- This request can be used to read a segment of the target certificate chain.
- This request may be used to initiate certification of Power Transmitter Product Devices.
- the authentication response message includes DIGESTS, CERTIFICATE, CHALLENGE_AUTH, and ERROR.
- the wireless power transmitter 100 may send a certificate chain summary using a DIGESTS response and report a slot including a valid certificate chain summary.
- This response may be used by the wireless power transmitter 100 to send the requested segment of the certificate chain.
- the wireless power transmitter 100 may respond to the CHALLENGE request using CHALLENGE_AUTH.
- This response may be used to transmit error information in the power transmitter.
- the authentication message may be called an authentication packet, or may be called authentication data or authentication control information. Also, messages such as GET_DIGEST and DIGESTS may be called GET_DIGEST packets and DIGEST packets.
- the wireless power receiver 200 and the wireless power transmitter 100 may transmit application level data through a data transport stream.
- Application level data delivered through a data transport stream may consist of a sequence of data packets having the following structure.
- 16 illustrates an application-level data stream between the wireless power transmitter 100 and the wireless power receiver 200 according to an example.
- the data stream may include auxiliary data control (ADC) data packets and/or auxiliary data transport (ADT) data packets.
- ADC auxiliary data control
- ADT auxiliary data transport
- ADC data packets are used to open the data stream.
- the ADC data packet may indicate the type of message included in the stream and the number of data bytes.
- ADT data packets are sequences of data that contain actual messages.
- ADC/end data packets are used. For example, the maximum number of data bytes in a data transport stream may be limited to 2047.
- ACK or NAC is used to inform whether ADC data packets and ADT data packets are normally received.
- control information necessary for wireless charging such as a control error packet (CE) or DSR, may be transmitted.
- CE control error packet
- DSR DSR
- authentication related information or other application level information may be transmitted and received between the wireless power transmitter and the receiver.
- FIG. 17 illustrates a power control method according to an embodiment.
- the wireless power transmitter 100 and the wireless power receiver 200 may control the amount of power transmitted by performing communication together with power transmission/reception.
- a wireless power transmitter and a wireless power receiver operate at a specific control point.
- the control point represents a combination of voltage and current provided from an output terminal of the wireless power receiver when power transfer is performed.
- the wireless power receiver selects the desired control point - the desired output current/voltage, temperature of a specific location of the mobile device, and additionally selects the actual control point currently operating (actual control point). ) to determine
- the wireless power receiver may calculate a control error value using the desired control point and the actual control point, and transmit it as a control error packet to the wireless power transmitter.
- the wireless power transmitter can control power transfer by setting/controlling new operating points—amplitude, frequency, and duty cycle—using the received control error packet. Therefore, the control error packet is transmitted/received at regular time intervals in the strategy transfer step.
- the control error value is negative, and when the current is to be increased, the control error It can be transmitted by setting the value to a positive number. In this way, in the induction mode, the wireless power receiver can control power transfer by transmitting a control error packet to the wireless power transmitter.
- resonance mode it can operate in a different way than in induction mode.
- one wireless power transmitter In the resonance mode, one wireless power transmitter must be able to simultaneously serve a plurality of wireless power receivers.
- the wireless power transmitter commonly transmits basic power, and the wireless power receiver controls the resonance frequency of the wireless power receiver to control the amount of power received.
- the method described in FIG. 17 is not completely excluded, and additional transmission power control may be performed by the method of FIG. 17 .
- Wireless charging methods include a magnetic induction method using a magnetic induction phenomenon between a primary coil and a secondary coil, and a magnetic resonance method in which magnetic resonance is achieved using a frequency in a band of several tens of kHz to several MHz to transmit power.
- the wireless charging standard for the magnetic resonance method is led by a conference called A4WP
- the magnetic induction method is led by the WPC (Wireless Power Consortium).
- the WPC is designed to exchange various status information and commands related to the wireless charging system in-band.
- BPP baseline power profile
- EPP extended power profile
- BPP Baseline power profile
- BPP relates to a power transfer profile between a wireless power transmitter and a receiver supporting power transmission of up to 5W. And, in BPP, unidirectional communication from a wireless power receiver to a wireless power transmitter is supported. The communication method at this time may correspond to amplitude shift keying (ASK). In BPP, protocol phases of ping, setup, and power delivery may exist.
- ASK amplitude shift keying
- EPP relates to a power transfer profile between a wireless power transmitter and a receiver supporting power transmission of up to 15W. And, in the EPP, bidirectional communication between the wireless power receiver and the wireless power transmitter is supported.
- a communication method from the wireless power receiver to the wireless power transmitter may correspond to amplitude shift keying (ASK), and a communication method from the wireless power transmitter to the wireless power receiver may correspond to frequency shift keying (FSK).
- ASK amplitude shift keying
- FSK frequency shift keying
- protocol phases of ping, setup, negotiation, and power transfer may exist.
- EPP may correspond to a higher profile of BPP.
- the EPP wireless power transmitter may operate as the BPP wireless power transmitter.
- the EPP wireless power receiver may operate as the BPP wireless power receiver.
- EPP can maintain compatibility with BPP.
- the EPP wireless power receiver may indicate that it is an EPP wireless power receiver by setting the 'neg' bit in the configuration packet (i.e. CFG) to 1.
- CFG configuration packet
- a specific example of the configuration packet is as described above.
- the EPP wireless power transmitter may respond to the wireless power receiver with an ACK FSK bit pattern.
- the BPP wireless power transmitter since the BPP wireless power transmitter does not support the FSK communication method, the BPP wireless power transmitter cannot transmit the FSK bit pattern. Accordingly, the EPP wireless power receiver that has transmitted the configuration packet to the BPP wireless power transmitter with the 'neg' bit set to 1 does not receive the ACK response, thereby identifying that the other wireless power transmitter is the BPP wireless power transmitter. .
- MPP magnetic power profile
- MPP relates to a power transfer profile between a wireless power transmitter and a receiver supporting power transmission of up to 15W. And, in MPP, bidirectional communication between a wireless power receiver and a wireless power transmitter is supported.
- a communication method from the wireless power receiver to the wireless power transmitter may correspond to amplitude shift keying (ASK), and a communication method from the wireless power transmitter to the wireless power receiver may correspond to frequency shift keying (FSK).
- ASK amplitude shift keying
- FSK frequency shift keying
- protocol phases of ping, setup, MPP negotiation, and MPP power delivery may exist.
- MPP may correspond to a higher profile of BPP.
- the MPP wireless power transmitter may operate as the BPP wireless power transmitter.
- the MPP wireless power receiver when placed on a BPP wireless power transmitter, the MPP wireless power receiver can operate as a BPP wireless power receiver.
- MPP can maintain compatibility with BPP.
- the MPP wireless power receiver may use a specific MPP indicator in an extended ID packet.
- An ID packet transmitted by the MPP wireless power receiver may be as follows.
- the value of the major version field from b4 to b7 of B0 may be set to 1.
- the value of the minor version field from b0 to b3 of B0 may be a value determined later.
- values of manufacturer codes of B1 and B2 may be allocated as PRMC codes.
- the value of the 'ext' field of b7 of B3 may be set to 1 to indicate that an additional XID packet is transmitted.
- values of random identifier fields of b0 to b6 of B3 and b3 to b7 of B4 and B5 may be set according to a random device identification policy.
- an XID packet in MPP may include an 'XID Selector' field, a 'Restricted' field, a 'Freq Mask' field, and the like.
- whether MPP is supported can be determined according to whether the value of 'XID selector' is 0xFE. That is, when the value of B_0 of the XID is 0xFE, the XID at this time may correspond to information notifying that the wireless power receiver supports MPP.
- the 'Restricted' field may correspond to information indicating whether the wireless power receiver operates in the MPP restricted mode or the MPP full mode. If the wireless power receiver selects to operate in the MPP limited mode, the above field may be set to 1. Meanwhile, in other cases (eg, when the wireless power receiver selects not to operate in the MPP limited mode), the above field may be set to 0.
- the 'Preferred Frequency' field may mean an MPP preferred frequency.
- the wireless power receiver may set this field to 128 kHz if it wishes to retrieve information from the wireless power transmitter before frequency switching (in the negotiation phase). In other cases, the wireless power receiver may set this field to 360 kHz.
- the 'Freq Mask' field corresponds to a field for determining whether an operating frequency of 360 kHz is supported. That is, when the 'Freq Mask' field is set to 0, 360 kHz is supported.
- the wireless power transmitter determines whether the 'Ext' bit of the ID received from the wireless power receiver is set to 1 and determines whether B_0 of the XID is set to 0xFE. support can be determined.
- the MPP wireless power transmitter can use the information contained in the ID and XID packets to perform a digital ping and identify the receiver.
- the wireless power transmitter may determine that the wireless power receiver supports MPP when all of the following conditions are satisfied.
- the lower header (byte 0) of the XID packet is set as the MPP selector.
- the wireless power transmitter may proceed with subsequent procedures according to the Qi v1.3 specification.
- the wireless power transmitter performs the following.
- MPP restricted mode when 'restricted' flag is set to 1.
- MPP full mode when 'restricted' flag is set to 0.
- the MPP wireless power transmitter when the MPP wireless power transmitter receives a setup packet in which the 'neg' bit is set to 1 from the wireless power receiver, the MPP wireless power transmitter (in the MPP pull mode) receives an MPP ACK FSK bit pattern for this It can respond to the wireless power receiver.
- the wireless power transmitter in the MPP limited mode since the wireless power transmitter in the MPP limited mode does not support the FSK communication method, the wireless power transmitter in the MPP limited mode cannot transmit the FSK bit pattern. However, since the wireless power transmitter in MPP limited mode uses a 360 kHz operation signal for power transfer, the 'neg' bit is set to 1 and the configuration packet is transmitted to the wireless power transmitter operating in MPP limited mode.
- the MPP wireless power receiver may identify that the counterpart wireless power transmitter is the wireless power transmitter in the MPP limited mode through the operating frequency.
- MPP Mobility GP
- MPP Restricted mode in other words, MPP baseline profile
- MPP Full mode in other words, MPP full profile
- the 'restricted' field in XID is set to 1, but in MPP full mode, the 'restricted' field in XID is set to 0.
- FSK communication is not supported in the MPP limited mode, but FSK communication may be supported in the MPP full mode.
- MPP negotiation is not supported in MPP limited mode.
- FSK communication is supported in the MPP full mode, an MPP ACK for the CFG can be transmitted. Accordingly, MPP negotiation can be supported in the MPP full mode.
- the MPP limited mode may be mixed with the MPP baseline profile
- the MPP full mode may be mixed with the MPP full profile
- FSK communication is not supported in MPP restricted mode. That is, in the MPP limited mode, there may not be a data packet transmitted from the wireless power transmitter to the wireless power receiver.
- MPP limited mode there may not be a data packet transmitted from the wireless power transmitter to the wireless power receiver.
- the wireless power receiver may transmit SIG to the wireless power transmitter on a first operating frequency (eg, 128 kHz).
- the first operating frequency may correspond to an operating frequency at which BPP and/or EPP may be performed.
- the first operating frequency at this time corresponds to the frequency at which the wireless power transmitter is driven.
- the wireless power receiver may transmit an ID packet to the wireless power transmitter on a first operating frequency.
- the 'ext' bit of the ID may be set to 1 to indicate that the XID is additionally transmitted.
- the wireless power receiver may transmit an XID packet to the wireless power transmitter on a first operating frequency.
- the value of B0 in the XID may be 0xFE, and if the value of B0 in the XID is set to 0xFE, this may correspond to information notifying that the wireless power receiver supports MPP.
- the 'Restricted' field in the XID at this time may be set to 1 so that the wireless power receiver can inform that it operates in the MPP restricted mode.
- the wireless power transmitter may remove the power signal and restart the ping phase at a new operating frequency.
- the wireless power receiver starts again from transmitting the SIG.
- the operating frequency at this time may be the second operating frequency (eg, 360 kHz).
- the wireless power receiver transmits ID, XID, and CFG packets to the wireless power transmitter at the second operating frequency, respectively.
- the wireless power receiver may receive wireless power based on the MPP baseline from the wireless power transmitter by transmitting the CEP to the wireless power transmitter.
- FSK communication may be supported in the MPP pull mode. That is, in the MPP full mode, there may be data packets transmitted from the wireless power transmitter to the wireless power receiver. In other words, MPP negotiation or the like may be performed between the wireless power transmitter and the wireless power receiver. Under this background, the protocol in the MPP full mode will be described through the drawings.
- 21 and 22 schematically show protocols in MPP pull mode.
- the wireless power receiver may transmit SIG to the wireless power transmitter on a first operating frequency (eg, 128 kHz).
- the first operating frequency may correspond to an operating frequency at which BPP and/or EPP may be performed.
- the first operating frequency at this time corresponds to the frequency at which the wireless power transmitter is driven.
- the wireless power receiver may transmit an ID packet to the wireless power transmitter on a first operating frequency.
- the 'ext' bit of the ID may be set to 1 to indicate that the XID is additionally transmitted.
- the wireless power receiver may transmit an XID packet to the wireless power transmitter on a first operating frequency.
- the value of B0 in the XID may be 0xFE, and if the value of B0 in the XID is set to 0xFE, this may correspond to information notifying that the wireless power receiver supports MPP.
- the 'Restricted' field in the XID at this time may be set to 0 to notify that the wireless power receiver operates in the MPP full mode.
- the power signal is not removed even though the wireless power transmitter receives the XID packet from the wireless power receiver. At this time, since the power signal is still not removed, the wireless power receiver transmits the CFG packet after the XID packet to the wireless power transmitter.
- the wireless power receiver may receive an MPP ACK from the wireless power transmitter as a response to the CFG packet.
- the wireless power receiver receiving the MPP ACK enters a negotiation phase with the wireless power transmitter, and both the wireless power receiver and the wireless power transmitter may proceed with negotiation.
- the wireless power receiver may enter a power delivery phase with the wireless power transmitter.
- the wireless power receiver transmits an EPT packet to the wireless power transmitter.
- the wireless power transmitter that has received the EPT packet removes the power signal and can then restart the ping phase at a new operating frequency.
- the wireless power receiver starts again from SIG transmission.
- the operating frequency at this time may be the second operating frequency (eg, 360 kHz).
- the wireless power receiver transmits ID, XID, and CFG packets to the wireless power transmitter at the second operating frequency, respectively. And, the wireless power receiver can receive the MPP ACK from the wireless power transmitter.
- the wireless power receiver receiving the MPP ACK enters a negotiation phase with the wireless power transmitter at the second operating frequency, and both the wireless power receiver and the wireless power transmitter may proceed with negotiation.
- the wireless power receiver After negotiation, the wireless power receiver enters a power transfer phase with the wireless power transmitter at the second operating frequency.
- the wireless power receiver may receive wireless power based on the MPP pull mode from the wireless power transmitter by transmitting XCE to the wireless power transmitter and responding thereto (eg, receiving an ACK).
- a format of a data transport stream capable of transmitting and receiving an application level data stream between a wireless power transmitter and a wireless power receiver is defined.
- the format of the data transport stream (in other words, the data stream) may be defined as the following packets.
- the ADC data packet may indicate the type of message included in the stream.
- the ADC data packet may indicate the number of data bytes included in the stream.
- the following packets may be defined.
- ADC and/or ADT Wireless Power Transmitter and Wireless Power Receiver
- DSR Wireless Power Receiver
- ACK/NAK/ND/ATN Wireless Power Transmitter
- the ADC may be a packet sent by the wireless power transmitter, and the ADC may be a packet sent by the wireless power receiver.
- the ADC packet of the wireless power transmitter is as follows.
- the ADC data packet can control the transmission of the data transport stream to the power receiver.
- the ADC packet may include a request field and a parameter field.
- each of the fields at this time may be as follows.
- 0 - ADC/end Close the data transmission stream going to the wireless power receiver.
- Subsequent DSR data packets may be as follows.
- the wireless power receiver did not issue a request because the incoming and/or outgoing data transport streams are already open or in use.
- the wireless power receiver does not support the requested data transport stream type.
- DSR/poll is a packet sent by PRx to PTx.
- DSR/poll can mean allowing the PTx to send a certain packet (continuing to a previously sent packet or a packet to be sent). That is, as described above, DSR/poll may invite the wireless power transmitter to transmit certain data packets.
- ADT may also be a packet sent by a wireless power transmitter, and ADT may be a packet sent by a wireless power receiver.
- ADT packet of the wireless power transmitter will be described in more detail as follows.
- ADT data packets carry the application data of the data transport stream to the power receiver.
- ADT data packet sizes from 1 to 7 may be used.
- ADT data packets for each size may be used with odd and even headers. For example, assuming that the size of the ADT data packet is 7 bytes, there may be a 7-byte ADT data packet having an odd header and a 7-byte ADT data packet having an even header.
- the ADT packet may include a data field, and the data field may be as follows.
- - Data field can be properly defined by the application layer.
- Subsequent DSR data packets may be as follows.
- the wireless power receiver received the last power transmitter data packet, but could not process the data in the packet. For example, the wireless power receiver may use this response when it is busy or cannot buffer data.
- the wireless power receiver does not have an incoming data transport stream open.
- DSR/poll is a packet sent by PRx to PTx.
- DSR/poll can mean allowing the PTx to send a certain packet (continuing to a previously sent packet or a packet to be sent). That is, as described above, DSR/poll may invite the wireless power transmitter to transmit certain data packets.
- a data transport stream (hereinafter referred to as TPL) can be divided into an initiator and a responder regardless of a wireless power receiver/wireless power transmitter.
- 25 schematically illustrates an example in which an application message is transmitted from a data stream initiator to a data stream responder.
- the initiator sends a data message to the responder.
- the initiator sends an application request message to a specific application (eg, authentication).
- a specific application eg, authentication
- the data stream initiator may first create a request message related to the application in the application layer and store it in a buffer.
- the data stream initiator may transfer the request message of the buffer to the transport layer and store it in a local buffer.
- the application request message stored in the local buffer may be sliced according to the ADT size and then delivered to the data stream responder through the data stream.
- the data stream responder may perform a response (ACK/NAK/ND). Then, the data stream responder may store the received sliced messages in its own local buffer one after another.
- the data stream initiator When the data stream initiator sends all application request messages and closes the data stream, it can provide feedback to (its own) application layer. And, after completing the received application request message, the data stream responder may transfer it to the application layer of the data stream responder.
- the data stream initiator corresponds to completion of delivery of the application request message.
- the data stream responder corresponds to completion of receiving the application request message.
- the positions of the data stream initiator and the data stream responder are swapped with each other. That is, the new data stream initiator may deliver an application response message (to the application request message) to the new data stream responder.
- the process of transmitting the application response message can be repeated as described above (ie, the new data stream initiator slices the application response message and delivers it to the new data stream responder through the data stream (eg ADT, etc.)).
- 26 schematically shows a flow chart for data transmission from the application point of view.
- a data stream initiator may transmit a (application) request message to a data stream responder.
- the method of transmitting the (application) request message from the data stream initiator to the data stream responder is the same as described above. That is, as shown in FIG. 25, the data stream initiator may slice the request message and transmit it to the data stream responder through the data stream (eg, ADT packet).
- the data stream responder receiving the (application) request message newly switches to the data stream initiator. That is, when the data stream responder receives the final ADC packet, which is a packet for the close of the data stream related to the application request message, from the data stream initiator, the data stream responder may switch to the data stream initiator.
- the new data stream initiator may transmit an application response message to the existing data stream initiator through a data stream (eg, an ADT packet).
- a data stream eg, an ADT packet
- the existing data stream initiator may become a new data stream responder.
- FIG 27 schematically illustrates an example in which another data transport stream is opened after one data transport stream is closed.
- the data stream initiator cannot send a proprietary (prop.) message in the middle of data communication, and the data stream initiator must arrive after the certificate chain with large data is terminated to send the proprietary message to the data stream responder. can send.
- applications that can be applied currently may have authentication and props.
- ADC/auth may be used to initiate authentication
- ADT/prop may be used to initiate prop. That is, each ADC may be used to open an application data stream desired by the initiator.
- the initiator opens the corresponding application data stream by sending an ADC packet.
- the data stream initiator can end the data stream by sending ADC/end.
- the responder can determine which request to respond first. there will be no.
- the data stream responder receives the ADC/end, it will not be able to determine which data stream to close.
- the current wireless power transmitter and/or wireless power receiver (corresponding to a data stream initiator) cannot open multiple application data streams. That is, current wireless power transmitters and/or wireless power receivers perform data transmission by opening and closing one stream and then opening another stream.
- the wireless power receiver at position (b) may attempt to open the prop data transmission stream. However, since this wireless power transmitter does not support simultaneous transmit and receive data transport streams, it may respond with ND.
- the wireless power transmitter may negotiate a power transfer contract with the wireless power receiver in the negotiation phase (S2810).
- the negotiation phase may correspond to a phase that does not exist in BPP. That is, a negotiation phase may exist only between a wireless power transmitter and a wireless power receiver supporting EPP and/or MPP.
- the wireless power transmitter may transfer wireless power to the wireless power receiver based on the power transfer contract in the power transfer phase (S2820).
- the operation between the wireless power transmitter and the wireless power receiver in the power transfer phase is basically the same as described above.
- the wireless power transmitter transmits the first data stream to the wireless power receiver, and while the wireless power transmitter transmits the first data stream, transmission of the second data stream is opened. can do.
- the wireless power transmitter may transmit a first initial ADC packet, at least one first ADT packet, and a first final ADC packet related to the first data stream to the wireless power receiver.
- the first initial ADC packet may be a packet related to opening the first data stream
- the first final ADC packet may be a packet related to closing the first data stream.
- the wireless power transmitter transmits the first initial ADC packet to the wireless power receiver and before transmitting the first final ADC packet to the wireless power receiver
- the wireless power transmitter is a second initial related to the opening of the second data stream
- ADC packets may be transmitted to the wireless power receiver.
- the wireless power transmitter may open transmission of the second data stream while transmitting the first data stream.
- the second data stream is not closed and only the first data stream can be closed.
- At least one of the first initial ADC packet, at least one first ADT packet, or the first final ADC packet may be marked with information identifying a channel for the first data stream.
- only the first data stream, not other data streams, may be closed by marking the final ADC packet transmitted by the terminal with information identifying a channel for the first data stream.
- the wireless power transmitter may transmit at least one second ADT packet and a second final ADC packet related to the second data stream to the wireless power receiver, and the second final ADC packet is a packet related to the close of the second data stream.
- At least one of the second initial ADC packet, at least one second ADT packet, or the second final ADC packet is Information identifying a channel for a data stream may be marked.
- the wireless power transmitter simultaneously transmits two data streams to the wireless power receiver.
- the wireless power transmitter according to the present specification may receive another data stream from the wireless power receiver while transmitting one data stream to the wireless power receiver.
- reception of the third data stream may be open while the wireless power transmitter transmits the first data stream. And, after the wireless power transmitter transmits the first initial ADC packet to the wireless power receiver and before transmitting the first final ADC packet to the wireless power receiver, the wireless power transmitter is a third initial related to the opening of the third data stream ADC packets may be received from the wireless power receiver.
- a specific (e.g. Authentication, ADC/auth) application stream is opened and other application streams (e.g. Prop, ADC/prop) are accessed during data transmission (the condition that the data stream is open but not closed).
- application streams e.g. Prop, ADC/prop
- by transmitting other data while the stream is open it is intended to provide a configuration for simultaneously transmitting multiple (e.g. Authentication, Prop) data.
- the initiator sends ADC/auth to the responder
- the responder sends ACK (if the responder is the wireless power transmitter), DSR/ack (if the responder is the in the case of a wireless power receiver).
- an application data stream corresponding to the first application eg, authentication
- the initiator sends ADC/prop to the responder, and the responder can respond with ACK (if the responder is a wireless power transmitter) or DSR/ack (if the responder is a wireless power receiver).
- ACK if the responder is a wireless power transmitter
- DSR/ack if the responder is a wireless power receiver
- a plurality of data streams corresponding to the first application (Authentication) and the second application (Prop) can be simultaneously opened, and a plurality of data can be transmitted.
- the initiator sends ADC/xxx to the responder, and the responder ACKs (the responder sends the wireless power transmitter ), DSR/ack (if the responder is a wireless power receiver). And, through this, an application data stream corresponding to the third application XXX can be opened.
- a cause arises to open the application data stream of the third application (eg, XXX)
- the initiator sends ADC/xxx to the responder
- the responder ACKs the responder sends the wireless power transmitter
- DSR/ack if the responder is a wireless power receiver
- three data streams can be simultaneously opened, and three data transport streams can be transmitted and received.
- the initiator may send ADC/close_prop to the responder and close the corresponding application stream.
- the initiator may close the corresponding application stream by sending ADC/close_auth.
- the initiator may close the corresponding application stream by sending ADC/close_xxx to the responder.
- the wireless power transmitter indicates an intention to open a specific application stream (e.g. ch1 or auth) to the wireless power receiver and receives a DSR/ack from the other party
- a specific application stream e.g. ch1 or auth
- the first corresponding application stream can perform the open function.
- the wireless power transmitter indicates an intention to open another application stream (e.g. ch2 or xxx) to the wireless power receiver and receives a DSR/ack from the other party
- the second application stream may perform the open function.
- the wireless power transmitter may perform the open function of the third application stream to the wireless power receiver in the same manner as in the previous process regarding another application stream (e.g. ch3 or yyy).
- another application stream e.g. ch3 or yyy.
- the wireless power transmitter sends the app. After expressing the intention to close the stream, the app. Data communication can be terminated only for streams.
- the wireless power transmitter may indicate an intention to close, and then terminate data communication only with respect to the corresponding app.stream.
- the wireless power transmitter expresses its intention to close, and then the first app.
- Data communication can be terminated for the stream.
- three apps were opened between the wireless power transmitter and the wireless power receiver. All data communication for the stream is terminated.
- the wireless power receiver indicates an intention to open a specific application stream (e.g. ch1 or auth) to the wireless power transmitter and receives an ACK from the other party
- a specific application stream e.g. ch1 or auth
- the wireless power receiver when the wireless power receiver indicates to the wireless power transmitter an intention to open another application stream (e.g. ch2 or xxx) and receives an ACK from the counterpart, the second application stream may perform the open function.
- another application stream e.g. ch2 or xxx
- the wireless power receiver may perform a function of opening a third application stream to the wireless power transmitter for another application stream (e.g. ch3 or yyy) according to the foregoing process.
- another application stream e.g. ch3 or yyy
- the wireless power transmitter sends the app. After expressing the intention to close the stream, the app. Data communication can be terminated only for streams.
- the wireless power transmitter may indicate an intention to close, and then terminate data communication only with respect to the corresponding app.stream.
- the wireless power transmitter expresses its intention to close, and then the first app.
- Data communication can be terminated for the stream.
- three apps were opened between the wireless power transmitter and the wireless power receiver. All data communication for the stream is terminated.
- app App of 'multiple or multiple channels' regardless of the open order of streams. It is possible to perform a data communication open on a stream. And, the app. Regardless of the open order of streams, the wireless power transmitter and/or the wireless power receiver closes data communication that is terminated first, so that the corresponding app. Data communication of the stream can be terminated. However, even in this case, the previously open app. Data communication may be performed for the stream.
- the above operation may be performed according to which role (initiator/responder) the wireless power receiver/wireless power transmitter has. For example, if the initiator is app. You may have both open/close privileges of the stream.
- a data stream having channel number 2 and/or a data stream having channel number 3 may be transmitted. does not exist. That is, according to the data communication method according to the prior art example, it is impossible to transmit another stream while one stream is being transmitted.
- the stream having channel number 1 being transmitted must be closed once. Only after that, the stream with channel number 2 can be opened and transmitted.
- a data stream having channel number 2 may be transmitted while an authentication-related data stream having channel number 1 is opened and transmitted.
- an open application data stream may be indicated through marking of a channel number.
- the data stream having channel number 1 can be closed.
- an application data stream to be closed may be indicated through marking of a channel number.
- the data stream having channel number 3 can be opened and transmitted.
- the data communication of the technology of the present specification can open several streams at the same time. After data transmission ends, the stream can be closed as soon as data transmission ends regardless of the open order. Transmission of another stream with a short length may also be possible during transmission of long data. This is different from that in the prior art, when long data is being transmitted, short data is transmitted only after the long data is transmitted.
- the wireless power transmitter and the wireless power receiver can transmit multiple data streams simultaneously in both directions.
- 31 and 32 are flow charts of an example of simultaneous bi-directional data communication, in accordance with an embodiment of the present disclosure.
- the wireless power transmitter may transmit ADC/ch1_auth/open in order to instruct the wireless power receiver to open the first data stream having channel number 1 from the perspective of a data stream initiator.
- the wireless power transmitter may mark channel number 1 to the ADC when transmitting the ADC related to the opening of the stream to the wireless power receiver.
- the wireless power transmitter may receive DSR/ack for the ADC from the wireless power receiver.
- the wireless power transmitter may transmit ADT (eg, may have a first header) to the wireless power receiver.
- ADT eg, may have a first header
- the wireless power transmitter may mark channel number 1 on the ADT.
- the wireless power transmitter may receive DSR/ack from the wireless power receiver as a response to the above ADT.
- the wireless power transmitter may transmit ADT (eg, may have a second header) to the wireless power receiver.
- ADT eg, may have a second header
- the wireless power transmitter may mark channel number 1 on the ADT.
- the method of toggling the header (header of odd number ⁇ -> header of even number value) whenever the wireless power transmitter transmits the ADT is the same as described above.
- the wireless power transmitter may receive DSR/ack from the wireless power receiver as a response to the above ADT.
- the wireless power transmitter may receive the second data stream from the wireless power receiver.
- the wireless power transmitter may receive ADC/ch2_xxx/open indicating the open of the second data stream having channel number 2 from the wireless power receiver from the perspective of a data stream responder.
- the wireless power receiver may mark channel number 2 to the ADC when transmitting the ADC related to the open of the stream to the wireless power transmitter.
- the wireless power transmitter may transmit an ACK for the ADC to the wireless power receiver.
- the wireless power transmitter may receive ADT (eg, may have a third header) from the wireless power receiver.
- ADT eg, may have a third header
- the wireless power receiver may mark the channel number 2 on the ADT.
- the wireless power transmitter may transmit an ACK to the wireless power receiver as a response to the above ADT.
- the wireless power transmitter may further receive an ADT for the second data stream (ie, channel number 2 is marked) from the wireless power receiver, and the wireless power transmitter may further transmit an ACK for the received ADT to the wireless power receiver.
- an ADT for the second data stream ie, channel number 2 is marked
- the wireless power transmitter may further transmit an ACK for the received ADT to the wireless power receiver.
- the wireless power transmitter may transmit the third data stream to the wireless power receiver.
- a specific example of transmitting the third data stream by the wireless power transmitter is the same as the example of transmitting the first data stream, except that the channel number is simply changed from 1 to 3. Therefore, repeated descriptions are omitted.
- the wireless power transmitter may receive ADC/ch2_xxx/close, which is information indicating the end of the second data stream, from the wireless power receiver in the position of a data stream responder.
- the wireless power receiver may mark channel number 2 in the ADC when transmitting the ADC related to the close of the stream to the wireless power transmitter.
- the wireless power receiver transmits an ADC for terminating the second data stream having channel number 2, so that only the second data stream having channel number 2 can be terminated. Accordingly, as described above, according to the prior art, when ADC/end is transmitted, the problem that all data streams are terminated can be solved.
- the wireless power transmitter may transmit an ACK for the ADC to the wireless power receiver.
- the wireless power transmitter may still transmit the first data stream and the third data stream to the wireless power receiver.
- the wireless power transmitter may transmit ADC/ch3_yyy/close, which is information indicating the end of the third data stream, to the wireless power receiver from the perspective of a data stream initiator.
- the wireless power transmitter may mark channel number 3 on the ADC when transmitting the ADC related to the close of the stream to the wireless power receiver.
- the wireless power transmitter may receive DSR/ack for the ADC from the wireless power receiver.
- the wireless power transmitter may still transmit the first data stream to the wireless power receiver.
- the wireless power transmitter may transmit ADC/ch1_auth/close, which is information indicating the end of the first data stream, to the wireless power receiver from the perspective of a data stream initiator.
- the wireless power transmitter may mark channel number 1 to the ADC when transmitting the ADC related to the close of the stream to the wireless power receiver.
- the wireless power transmitter may receive DSR/ack for the ADC from the wireless power receiver.
- the wireless power transmitter may simultaneously deliver several data streams to the wireless power receiver.
- 33 and 34 are flowcharts of an example of multiple data communication, according to embodiments herein.
- the wireless power transmitter may transmit ADC/ch1_auth/open in order to instruct the wireless power receiver to open the first data stream having channel number 1 from the perspective of a data stream initiator.
- the wireless power transmitter may mark channel number 1 to the ADC when transmitting the ADC related to the opening of the stream to the wireless power receiver.
- the wireless power transmitter may receive DSR/ack for the ADC from the wireless power receiver.
- the wireless power transmitter may transmit ADC/ch2_xxx/open to instruct the wireless power receiver to open the second data stream having channel number 2, from the viewpoint of the data stream initiator.
- the wireless power transmitter may mark channel number 2 to the ADC when transmitting the ADC related to the opening of the stream to the wireless power receiver.
- the wireless power transmitter may receive DSR/ack for the ADC from the wireless power receiver.
- the wireless power transmitter may transmit ADC/ch3_yyy/open to instruct the wireless power receiver to open the third data stream having channel number 3, from the viewpoint of a data stream initiator.
- the wireless power transmitter may mark channel number 3 on the ADC when transmitting the ADC related to the open of the stream to the wireless power receiver.
- the wireless power transmitter may receive DSR/ack for the ADC from the wireless power receiver.
- the wireless power transmitter opens the first data stream, the second data stream, and the third data stream, respectively, and simultaneously transmits the first data stream, the second data stream, and the third data stream wirelessly. can be transmitted to the power receiver.
- the wireless power transmitter may transmit ADC/ch2_xxx/close, which is information indicating an end of the second data stream, to the wireless power receiver from the perspective of a data stream initiator.
- the wireless power transmitter may mark channel number 2 in the ADC when transmitting the ADC related to the close of the stream to the wireless power receiver.
- the wireless power transmitter transmits an ADC for terminating the second data stream having channel number 2, so that only the second data stream having channel number 2 can be terminated. Accordingly, as described above, according to the prior art, when ADC/end is transmitted, the problem that all data streams are terminated can be solved.
- the wireless power transmitter may receive DSR/ack for the ADC from the wireless power receiver.
- the wireless power transmitter may still transmit the first data stream and the third data stream to the wireless power receiver.
- the wireless power transmitter may transmit ADC/ch3_yyy/close, which is information indicating the end of the third data stream, to the wireless power receiver from the perspective of a data stream initiator.
- the wireless power transmitter may mark channel number 3 on the ADC when transmitting the ADC related to the close of the stream to the wireless power receiver.
- the wireless power transmitter may receive DSR/ack for the ADC from the wireless power receiver.
- the wireless power transmitter may still transmit the first data stream to the wireless power receiver.
- the wireless power transmitter may transmit ADC/ch1_auth/close, which is information indicating the end of the first data stream, to the wireless power receiver from the perspective of a data stream initiator.
- the wireless power transmitter may mark channel number 1 to the ADC when transmitting the ADC related to the close of the stream to the wireless power receiver.
- the wireless power transmitter may receive DSR/ack for the ADC from the wireless power receiver.
- a method for the wireless power receiver/wireless power transmitter to express open/close of the data stream to the other device a method of defining a separate TPL packet or a method of defining a separate TPL packet or a separate A method of adding bits may be provided.
- 35 schematically illustrates an example of a separate data stream close packet.
- a separate data stream close packet may include a TPL/type field and a parameter field.
- the TPL/type field may have the following values, for example.
- the parameter field may include information about a channel to which the data stream is to be closed. That is, in the parameter field, a parameter for an application stream (channel) for which a data stream is to be closed may be set.
- an ADC packet may include a request field and a parameter field.
- the request field may be set as follows.
- the parameter field may include information on which data stream is to be closed.
- the parameter field may include information on a channel to which the data stream is to be closed (data stream closing channel). That is, in the parameter field, a parameter for an application stream (channel) for which a data stream is to be closed may be set.
- information about a stream channel may be included in the ADT packet in order to indicate which data stream this ADT packet corresponds to.
- the ADT packet transmitted by the data stream initiator may include information on a stream channel.
- the data stream responder can identify which data stream the ADT packet corresponds to by checking information on a stream channel included in the ADT packet received by the data stream responder.
- FIG. 37 shows an example in which information about a stream channel is included in B_0 of an ADT packet
- FIG. 38 shows an example in which information about a stream channel is included in B_n+1 of an ADT packet.
- 39 is a flowchart of a method of transmitting wireless power from the perspective of a wireless power transmitter according to an embodiment of the present specification.
- the wireless power transmitter may negotiate a power transfer contract with the wireless power receiver in the negotiation phase (S3910).
- the wireless power transmitter may transfer the wireless power to the wireless power receiver based on the power transfer contract in a power transfer phase (S3920).
- the wireless power transmitter transmits a first data stream to the wireless power receiver, and the wireless power transmitter opens transmission of a second data stream while transmitting the first data stream. )can do.
- the wireless power transmitter transmits a first initial ADC packet, at least one first ADT packet, and a first final ADC packet related to the first data stream to the wireless power receiver, and the first initial ADC packet A packet related to opening of the first data stream, and the first final ADC packet may be a packet related to closing of the first data stream.
- the wireless power transmitter transmits the second data A second initial ADC packet related to the opening of a stream may be transmitted to the wireless power receiver.
- the second data stream may not be closed and only the first data stream may be closed.
- At least one of the first initial ADC packet, the at least one first ADT packet, or the first final ADC packet may be marked with information identifying a channel for the first data stream.
- the wireless power transmitter transmits at least one second ADT packet and a second final ADC packet related to the second data stream to the wireless power receiver, and the second final ADC packet corresponds to the second data stream. It may be a packet related to close.
- At least one of the second initial ADC packet, the at least one second ADT packet, or the second final ADC packet may be marked with information identifying a channel for the second data stream.
- reception of a third data stream may be opened while the wireless power transmitter transmits the first data stream.
- the wireless power transmitter transmits the third data stream A third initial ADC packet related to open may be received from the wireless power receiver.
- a wireless power transmitter may be provided.
- the wireless power transmitter may include a converter related to transferring wireless power to the wireless power receiver and a communication/controller related to controlling the transfer of the wireless power.
- the wireless power transmitter may negotiate a power transfer contract with the wireless power receiver in a negotiation phase and deliver the wireless power to the wireless power receiver based on the power transfer contract in a power transfer phase.
- the wireless power transmitter may transmit a first data stream to the wireless power receiver, and the wireless power transmitter may open transmission of a second data stream while transmitting the first data stream.
- FIG. 40 is a flowchart of a method of receiving wireless power from the point of view of a wireless power receiver according to an embodiment of the present specification.
- the wireless power receiver may negotiate a power transfer contract with the wireless power transmitter in the negotiation phase (S4010).
- the wireless power receiver may receive the wireless power from the wireless power transmitter based on the power transfer contract in a power transfer phase (S4010).
- the wireless power receiver receives a first data stream from the wireless power transmitter, and reception of a second data stream is open while the wireless power receiver receives the first data stream.
- a wireless power receiver may be provided.
- the wireless power receiver may include a power picker related to receiving wireless power from the wireless power transmitter and a communication/controller related to controlling reception of the wireless power.
- the wireless power receiver may negotiate a power transfer contract with the wireless power transmitter in a negotiation phase and receive the wireless power from the wireless power transmitter based on the power transfer contract in a power transfer phase.
- the wireless power receiver receives a first data stream from the wireless power transmitter, and reception of a second data stream is opened while the wireless power receiver receives the first data stream.
- the responder will not be able to determine which request to respond first.
- the data stream responder receives the ADC/end, it will not be able to determine which data stream to close.
- an ADC packet and/or an ADT packet are provided with a configuration for marking which data stream the ADC packet and/or the ADT packet correspond to.
- a data transport stream related to safety may be transmitted while a data transport stream having a low priority is transmitted. Accordingly, a problem situation in which heat is generated between the wireless power transmitter and the wireless power receiver can be prevented.
- multi-stream transmission of application messages may be provided for data transmission when the importance of data is high or the length of data is short.
- an efficient and safe wireless power system can be provided.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
PDU Type | Packet Name |
0000 | ADV_IND |
0001 | ADV_DIRECT_IND |
0010 | ADV_NONCONN_IND |
0011 | SCAN_REQ |
0100 | SCAN_RSP |
0101 | CONNECT_REQ |
0110 | ADV_SCAN_IND |
0111-1111 | Reserved |
Claims (20)
- 무선 전력 전송 시스템에서 무선 전력 전송기에 의해 수행되는 무선 전력을 전달하는 방법에 있어서,협상 페이즈에서 무선 전력 수신기와 전력 전달 계약을 협상하고; 및전력 전달 페이즈에서 상기 전력 전달 계약에 기반하여 상기 무선 전력을 상기 무선 전력 수신기에게 전달하되,상기 전력 전달 페이즈 동안 상기 무선 전력 전송기는 상기 무선 전력 수신기에게 제1 데이터 스트림을 전송하고, 및상기 무선 전력 전송기가 상기 제1 데이터 스트림을 전송하는 동안 제2 데이터 스트림의 전송을 오픈(open)하는 것을 특징으로 하는 방법.
- 제1항에 있어서, 상기 무선 전력 전송기는 상기 제1 데이터 스트림에 관련된 제1 이니셜 ADC 패킷, 적어도 하나의 제1 ADT 패킷, 제1 최종 ADC 패킷을 상기 무선 전력 수신기에게 전송하고,상기 제1 이니셜 ADC 패킷은 상기 제1 데이터 스트림의 오픈에 관련된 패킷이고,상기 제1 최종 ADC 패킷은 상기 제1 데이터 스트림의 클로즈에 관련된 패킷인 것을 특징으로 하는 방법.
- 제2항에 있어서, 상기 무선 전력 전송기가 상기 제1 이니셜 ADC 패킷을 상기 무선 전력 수신기에게 전송한 이후 및 상기 제1 최종 ADC 패킷을 상기 무선 전력 수신기에게 전송하기 이전에, 상기 무선 전력 전송기는 상기 제2 데이터 스트림의 오픈에 관련된 제2 이니셜 ADC 패킷을 상기 무선 전력 수신기에게 전송하는 것을 특징으로 하는 방법.
- 제3항에 있어서, 상기 무선 전력 전송기가 상기 제1 최종 ADC 패킷을 상기 무선 전력 수신기에게 전송함에 기반하여, 상기 제2 데이터 스트림은 클로즈되지 않고 상기 제1 데이터 스트림만이 클로즈 되는 것을 특징으로 하는 방법.
- 제3항에 있어서, 상기 제1 이니셜 ADC 패킷, 상기 적어도 하나의 제1 ADT 패킷 또는 상기 제1 최종 ADC 패킷 중 적어도 하나에게 상기 제1 데이터 스트림에 대한 채널을 식별하는 정보가 마킹되는 것을 특징으로 하는 방법.
- 제3항에 있어서, 상기 무선 전력 전송기는 상기 제2 데이터 스트림에 관련된 적어도 하나의 제2 ADT 패킷, 제2 최종 ADC 패킷을 상기 무선 전력 수신기에게 전송하고,상기 제2 최종 ADC 패킷은 상기 제2 데이터 스트림의 클로즈에 관련된 패킷인 것을 특징으로 하는 방법.
- 제6항에 있어서, 상기 제2 이니셜 ADC 패킷, 상기 적어도 하나의 제2 ADT 패킷 또는 상기 제2 최종 ADC 패킷 중 적어도 하나에게 상기 제2 데이터 스트림에 대한 채널을 식별하는 정보가 마킹되는 것을 특징으로 하는 방법.
- 제1항에 있어서, 상기 무선 전력 전송기가 상기 제1 데이터 스트림을 전송하는 동안 제3 데이터 스트림의 수신이 오픈되는 것을 특징으로 하는 방법.
- 제8항에 있어서, 상기 무선 전력 전송기가 제1 이니셜 ADC 패킷을 상기 무선 전력 수신기에게 전송한 이후 및 제1 최종 ADC 패킷을 상기 무선 전력 수신기에게 전송하기 이전에, 상기 무선 전력 전송기는 상기 제3 데이터 스트림의 오픈에 관련된 제3 이니셜 ADC 패킷을 상기 무선 전력 수신기로부터 수신하는 것을 특징으로 하는 방법.
- 무선 전력 전송기는,무선 전력 수신기에게 무선 전력을 전달하는 것에 관련된 컨버터;상기 무선 전력의 전달을 제어하는 것에 관련된 커뮤니케이션/컨트롤기를 포함하되,상기 무선 전력 전송기는:협상 페이즈에서 상기 무선 전력 수신기와 전력 전달 계약을 협상하고; 및전력 전달 페이즈에서 상기 전력 전달 계약에 기반하여 상기 무선 전력을 상기 무선 전력 수신기에게 전달하되,상기 전력 전달 페이즈 동안 상기 무선 전력 전송기는 상기 무선 전력 수신기에게 제1 데이터 스트림을 전송하고, 및상기 무선 전력 전송기가 상기 제1 데이터 스트림을 전송하는 동안 제2 데이터 스트림의 전송을 오픈(open)하는 것을 특징으로 하는 무선 전력 전송기.
- 무선 전력 전송 시스템에서 무선 전력 수신기에 의해 수행되는 무선 전력을 수신하는 방법에 있어서,협상 페이즈에서 무선 전력 전송기와 전력 전달 계약을 협상하고; 및전력 전달 페이즈에서 상기 전력 전달 계약에 기반하여 상기 무선 전력을 상기 무선 전력 전송기로부터 수신하되,상기 전력 전달 페이즈 동안 상기 무선 전력 수신기는 상기 무선 전력 전송기로부터 제1 데이터 스트림을 수신하고, 및상기 무선 전력 수신기가 상기 제1 데이터 스트림을 수신하는 동안 제2 데이터 스트림의 수신이 오픈(open)되는 것을 특징으로 하는 방법.
- 제11항에 있어서, 상기 무선 전력 수신기는 상기 제1 데이터 스트림에 관련된 제1 이니셜 ADC 패킷, 적어도 하나의 제1 ADT 패킷, 제1 최종 ADC 패킷을 상기 무선 전력 전송기로부터 수신하고,상기 제1 이니셜 ADC 패킷은 상기 제1 데이터 스트림의 오픈에 관련된 패킷이고,상기 제1 최종 ADC 패킷은 상기 제1 데이터 스트림의 클로즈에 관련된 패킷인 것을 특징으로 하는 방법.
- 제12항에 있어서, 상기 무선 전력 수신기가 상기 제1 이니셜 ADC 패킷을 상기 무선 전력 전송기로부터 수신한 이후 및 상기 제1 최종 ADC 패킷을 상기 무선 전력 전송기로부터 수신하기 이전에, 상기 무선 전력 수신기는 상기 제2 데이터 스트림의 오픈에 관련된 제2 이니셜 ADC 패킷을 상기 무선 전력 전송기로부터 수신하는 것을 특징으로 하는 방법.
- 제13항에 있어서, 상기 무선 전력 수신기가 상기 제1 최종 ADC 패킷을 상기 무선 전력 전송기로부터 수신함에 기반하여, 상기 제2 데이터 스트림은 클로즈되지 않고 상기 제1 데이터 스트림만이 클로즈 되는 것을 특징으로 하는 방법.
- 제13항에 있어서, 상기 제1 이니셜 ADC 패킷, 상기 적어도 하나의 제1 ADT 패킷 또는 상기 제1 최종 ADC 패킷 중 적어도 하나에게 상기 제1 데이터 스트림에 대한 채널을 식별하는 정보가 마킹되는 것을 특징으로 하는 방법.
- 제13항에 있어서, 상기 무선 전력 수신기는 상기 제2 데이터 스트림에 관련된 적어도 하나의 제2 ADT 패킷, 제2 최종 ADC 패킷을 상기 무선 전력 전송기로부터 수신하고,상기 제2 최종 ADC 패킷은 상기 제2 데이터 스트림의 클로즈에 관련된 패킷인 것을 특징으로 하는 방법.
- 제16항에 있어서, 상기 제2 이니셜 ADC 패킷, 상기 적어도 하나의 제2 ADT 패킷 또는 상기 제2 최종 ADC 패킷 중 적어도 하나에게 상기 제2 데이터 스트림에 대한 채널을 식별하는 정보가 마킹되는 것을 특징으로 하는 방법.
- 제11항에 있어서, 상기 무선 전력 수신기가 상기 제1 데이터 스트림을 수신하는 동안 제3 데이터 스트림의 전송을 오픈하는 것을 특징으로 하는 방법.
- 제18항에 있어서, 상기 무선 전력 수신기가 제1 이니셜 ADC 패킷을 상기 무선 전력 전송기로부터 수신한 이후 및 제1 최종 ADC 패킷을 상기 무선 전력 전송기로부터 수신하기 이전에, 상기 무선 전력 수신기는 상기 제3 데이터 스트림의 오픈에 관련된 제3 이니셜 ADC 패킷을 상기 무선 전력 전송기에게 전송하는 것을 특징으로 하는 방법.
- 무선 전력 수신기는,무선 전력 전송기로부터 무선 전력을 수신하는 것에 관련된 전력 픽업기; 및상기 무선 전력의 수신을 제어하는 것에 관련된 커뮤니케이션/컨트롤기를 포함하되,상기 무선 전력 수신기는:협상 페이즈에서 상기 무선 전력 전송기와 전력 전달 계약을 협상하고; 및전력 전달 페이즈에서 상기 전력 전달 계약에 기반하여 상기 무선 전력을 상기 무선 전력 전송기로부터 수신하되,상기 전력 전달 페이즈 동안 상기 무선 전력 수신기는 상기 무선 전력 전송기로부터 제1 데이터 스트림을 수신하고, 및상기 무선 전력 수신기가 상기 제1 데이터 스트림을 수신하는 동안 제2 데이터 스트림의 수신이 오픈(open)되는 것을 특징으로 하는 무선 전력 수신기.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202280055412.8A CN117813743A (zh) | 2021-08-17 | 2022-08-11 | 无线功率传输***中同时多个数据通信的方法和装置 |
KR1020247002492A KR20240027019A (ko) | 2021-08-17 | 2022-08-11 | 무선 전력 전송 시스템에서 동시 다중의 데이터 통신 방법 및 장치 |
EP22858678.0A EP4362281A1 (en) | 2021-08-17 | 2022-08-11 | Method and apparatus for simultaneous multiple data communication in wireless power transmission system |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2021-0108250 | 2021-08-17 | ||
KR20210108250 | 2021-08-17 | ||
KR20210120575 | 2021-09-09 | ||
KR10-2021-0120575 | 2021-09-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2023022441A1 true WO2023022441A1 (ko) | 2023-02-23 |
Family
ID=85240738
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2022/012032 WO2023022441A1 (ko) | 2021-08-17 | 2022-08-11 | 무선 전력 전송 시스템에서 동시 다중의 데이터 통신 방법 및 장치 |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4362281A1 (ko) |
KR (1) | KR20240027019A (ko) |
WO (1) | WO2023022441A1 (ko) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160301238A1 (en) * | 2015-04-10 | 2016-10-13 | Intel Corporation | Managing presence and long beacon extension pulses |
KR101835034B1 (ko) * | 2016-04-07 | 2018-03-08 | 한국과학기술원 | 구조물 모니터링용 센서를 위한 전력 및 데이터의 동시 무선 전송 방법 및 이를 위한 시스템 |
KR20190122214A (ko) * | 2018-04-16 | 2019-10-29 | 엘지전자 주식회사 | 무선전력 전송시스템에서 데이터 스트림의 전송을 수행하는 장치 및 방법 |
KR20210000265A (ko) * | 2019-06-24 | 2021-01-04 | 애플 인크. | 동시 활성 데이터 스트림들을 갖는 무선 전력 시스템들 |
KR20210096097A (ko) * | 2019-11-29 | 2021-08-04 | 엘렉트디스 에이비 | 무선 전력 전송 시스템에서 전력 전송 동안에 동작 피드백을 제공하는 방법 및 장치 |
-
2022
- 2022-08-11 EP EP22858678.0A patent/EP4362281A1/en active Pending
- 2022-08-11 KR KR1020247002492A patent/KR20240027019A/ko unknown
- 2022-08-11 WO PCT/KR2022/012032 patent/WO2023022441A1/ko active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160301238A1 (en) * | 2015-04-10 | 2016-10-13 | Intel Corporation | Managing presence and long beacon extension pulses |
KR101835034B1 (ko) * | 2016-04-07 | 2018-03-08 | 한국과학기술원 | 구조물 모니터링용 센서를 위한 전력 및 데이터의 동시 무선 전송 방법 및 이를 위한 시스템 |
KR20190122214A (ko) * | 2018-04-16 | 2019-10-29 | 엘지전자 주식회사 | 무선전력 전송시스템에서 데이터 스트림의 전송을 수행하는 장치 및 방법 |
KR20210000265A (ko) * | 2019-06-24 | 2021-01-04 | 애플 인크. | 동시 활성 데이터 스트림들을 갖는 무선 전력 시스템들 |
KR20210096097A (ko) * | 2019-11-29 | 2021-08-04 | 엘렉트디스 에이비 | 무선 전력 전송 시스템에서 전력 전송 동안에 동작 피드백을 제공하는 방법 및 장치 |
Also Published As
Publication number | Publication date |
---|---|
KR20240027019A (ko) | 2024-02-29 |
EP4362281A1 (en) | 2024-05-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2021153815A1 (ko) | 무선충전 장치, 방법 및 시스템에서 아웃밴드 통신이 가능한 장치 및 방법 | |
WO2020190109A1 (ko) | 무선충전 장치, 방법 및 시스템에서 아웃밴드 통신이 가능한 장치 및 방법 | |
WO2021230703A1 (ko) | 무선전력 수신장치 및 무선전력 수신장치에 의한 통신 방법 | |
WO2021215793A1 (ko) | 무선전력 수신장치 및 무선전력 전송장치 | |
WO2023287219A1 (ko) | 무선 전력 전송 시스템에서 통신 속도에 따른 최대 데이터 크기 결정 방법 및 장치 | |
WO2022164271A1 (ko) | 무선 전력 전송 시스템에서 블루투스 및 인-밴드 통신을 통한 장치 연결 방법 및 장치 | |
WO2022045863A1 (ko) | 무선전력 전송장치 및 무선전력 수신장치 | |
WO2022050732A1 (ko) | 무선전력 전송장치, 무선전력 수신장치, 무선전력 전송장치에 의한 통신 방법 및 무선전력 수신장치에 의한 통신 방법 | |
WO2021235864A1 (ko) | 무선전력 전송방법 및 무선전력 수신방법 | |
WO2021215832A1 (ko) | 무선전력 수신장치 및 무선전력 전송장치 | |
WO2023022441A1 (ko) | 무선 전력 전송 시스템에서 동시 다중의 데이터 통신 방법 및 장치 | |
WO2023075546A1 (ko) | 무선 전력 전송 시스템에서 데이터 통신 방법 및 장치 | |
WO2023096354A1 (ko) | 무선 전력 전송 시스템에서 통신 지원 표시 방법 및 장치 | |
WO2023022506A1 (ko) | 무선 전력 전송 시스템에서 데이터 통신 중 일시 정지에 관한 방법 및 장치 | |
WO2023080759A1 (ko) | 무선 전력 전송 시스템에서 아웃 오브 밴드 통신 및 아웃 오브 밴드 통신에 대한 설정 방법 및 장치 | |
WO2023106840A1 (ko) | 무선 전력 전송 시스템에서 어플리케이션 메시지에 대한 시간 요구 사항에 관한 방법 및 장치 | |
WO2023027514A1 (ko) | 무선 전력 전송 시스템에서 데이터 통신 리셋 및 강제 종료(abort)에 관한 방법 및 장치 | |
WO2023085855A1 (ko) | 무선 전력 전송 시스템에서 아웃 오브 밴드 통신의 연결 방법 및 장치 | |
WO2023277671A1 (ko) | 무선 전력 전송 시스템에서 프로파일 간 호환성 확보 방법 및 장치 | |
WO2023075570A1 (ko) | 무선 전력 전송 시스템에서 인증 방법 및 장치 | |
WO2023287139A1 (ko) | 무선 전력 전송 시스템에 로우 커플링 파워 프로파일(low-coupling power profile)로의 전환 방법 및 장치 | |
WO2023158291A1 (ko) | 무선 전력 전송 시스템에서 빠른 fsk 통신에 대한 방법 및 장치 | |
WO2023282548A1 (ko) | 무선 전력 전송 시스템에서 mpp와의 호환성을 제공하는 방법 및 장치 | |
WO2023038429A1 (ko) | 무선 전력 전송 시스템에서 불법 패킷의 처리 및 유효성 검증에 대한 방법 및 장치 | |
WO2023106827A1 (ko) | 무선 전력 전송 시스템에서 어플리케이션 메시지에 대한 시간 요구 사항에 관한 방법 및 장치 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22858678 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20247002492 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2022858678 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202417008059 Country of ref document: IN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202280055412.8 Country of ref document: CN |
|
ENP | Entry into the national phase |
Ref document number: 2022858678 Country of ref document: EP Effective date: 20240125 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2024509403 Country of ref document: JP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |