WO2006001133A1 - 無線通信システム、クレードル装置、並びに携帯型機器 - Google Patents
無線通信システム、クレードル装置、並びに携帯型機器 Download PDFInfo
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- WO2006001133A1 WO2006001133A1 PCT/JP2005/008903 JP2005008903W WO2006001133A1 WO 2006001133 A1 WO2006001133 A1 WO 2006001133A1 JP 2005008903 W JP2005008903 W JP 2005008903W WO 2006001133 A1 WO2006001133 A1 WO 2006001133A1
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- cradle
- portable device
- transmission
- carrier wave
- data
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- 238000004891 communication Methods 0.000 title claims abstract description 133
- 230000005540 biological transmission Effects 0.000 claims abstract description 97
- 230000004044 response Effects 0.000 claims description 13
- 238000012545 processing Methods 0.000 claims description 12
- 238000012546 transfer Methods 0.000 claims description 6
- 238000003384 imaging method Methods 0.000 claims description 2
- 230000001771 impaired effect Effects 0.000 abstract description 2
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- 230000006870 function Effects 0.000 description 53
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- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 101000741965 Homo sapiens Inactive tyrosine-protein kinase PRAG1 Proteins 0.000 description 1
- 102100038659 Inactive tyrosine-protein kinase PRAG1 Human genes 0.000 description 1
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1632—External expansion units, e.g. docking stations
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/002—Specific input/output arrangements not covered by G06F3/01 - G06F3/16
- G06F3/005—Input arrangements through a video camera
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00127—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
- H04N1/00204—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a digital computer or a digital computer system, e.g. an internet server
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00127—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
- H04N1/00204—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a digital computer or a digital computer system, e.g. an internet server
- H04N1/00209—Transmitting or receiving image data, e.g. facsimile data, via a computer, e.g. using e-mail, a computer network, the internet, I-fax
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
- H04N21/4143—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance embedded in a Personal Computer [PC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
- H04N21/4223—Cameras
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
- H04N21/43637—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
- H04N2201/0008—Connection or combination of a still picture apparatus with another apparatus
- H04N2201/0034—Details of the connection, e.g. connector, interface
- H04N2201/0036—Detecting or checking connection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
- H04N2201/0008—Connection or combination of a still picture apparatus with another apparatus
- H04N2201/0034—Details of the connection, e.g. connector, interface
- H04N2201/0037—Topological details of the connection
- H04N2201/0041—Point to point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
- H04N2201/0008—Connection or combination of a still picture apparatus with another apparatus
- H04N2201/0034—Details of the connection, e.g. connector, interface
- H04N2201/0048—Type of connection
- H04N2201/0055—By radio
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
- H04N2201/0008—Connection or combination of a still picture apparatus with another apparatus
- H04N2201/0034—Details of the connection, e.g. connector, interface
- H04N2201/0048—Type of connection
- H04N2201/0058—Docking-station, cradle or the like
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
- H04N2201/0077—Types of the still picture apparatus
- H04N2201/0084—Digital still camera
Definitions
- Wireless communication system Wireless communication system, cradle device, and portable device
- the present invention relates to a wireless communication system for achieving low power consumption communication operation between devices within a relatively short distance, and in particular, transmission of unmodulated carrier from the reflected wave reader side, reflector side
- the present invention relates to a back-to-back wireless communication system in which data communication is performed using the modulation of a reflected wave based on the switching operation of antenna load impedance and the like.
- the present invention relates to a wireless communication system for connecting a cradle device and a portable device without impairing the operability of the portable device, a cradle device, and a portable device, and in particular, to proximity. And a wireless communication system for wirelessly connecting the cradle device and the portable device by suppressing interference with other wireless systems, the cradle device, and the portable device.
- IEEE The Institute of Electrical and Electronics Engineers 802. 11, HiperLAN Z2, IEEE 802.35.3, Bluetooth communication, etc.
- wireless LAN systems have become less expensive, and combined with the fact that they are built into PCs as standard, wireless LANs have become widespread.
- a relatively small wireless communication system is used for data transmission between a host device and a terminal device, such as in a home.
- host devices here include stationary home appliances such as TVs, monitors, printers, PCs, VTRs, and DVD players.
- terminal devices include digital 'cameras, video cameras, cell phones, personal digital assistants,
- mopile-type device that needs to minimize power consumption, such as a portable music player.
- Applications of this type of system include uploading image data taken with a camera phone or digital camera to a PC via wireless LAN.
- a digital camera that is advantageous for performing Bluetooth communication well has been proposed (see, for example, Patent Document 1). That is, although the digital camera has a case and a shirt button provided on the case, the shirt button is provided at the upper end of the case at one end in the left-right direction. . Also, in the case, an antenna for Bluetooth communication is provided at the upper end of the case at the other end in the left-right direction.
- the wireless LAN is originally designed and developed on the premise of use in a computer, and when it is installed in a mopile system device, the power consumption becomes a problem.
- L ib wireless LAN cards consume more than 800mW when transmitting and more than 600mW when receiving. This power consumption is burdensome for battery-powered portable devices.
- transmission from an image input device such as a digital camera or the like to the image display device side is a communication mode in which the transmission ratio occupies most of the entire communication, so a wireless transmission means with even lower power consumption is required. There is.
- the transmission speed is as low as 720 kbps at the maximum, and the current image quality has been improved, and time is awkward to transmit an image with a large file size.
- the back's-scanner type radio communication system is composed of a reflector that transmits data by a modulated reflected wave, and a reflected wave reader that reads data from the reflected wave from the reflector.
- a reflected wave reader transmits an unmodulated carrier.
- the reflector performs a modulation process according to the transmission data on the non-modulated carrier, using a load impedance operation such as on-off of the terminal end of the antenna, for example.
- Send data Then, on the side of the reflected wave reader, this reflected wave can be received and demodulated and decoded to obtain transmission data.
- the reflector is configured of an antenna that reflects continuous wave radio waves that are incident, a generation circuit of transmission data, and an impedance change circuit that changes the impedance of the antenna according to the transmission data (see FIG. See, for example, Patent Document 2).
- the antenna switch for changing the load impedance of the antenna (that is, performing modulation of the reflected wave) is generally formed of a gallium arsenide IC, and its power consumption is several tens It is less than W, and as average power when data transmission is performed, data transmission is possible with 10 mW or less in the case of the delivery confirmation method, and several 10 W in one-way transmission.
- This is an overwhelming performance difference as compared to the average power consumption of a general wireless LAN (see, for example, Japanese Patent Application No. 2003-291809). Therefore, even when a terminal device for storing information is mounted on a battery-operated unit such as a digital 'camera', battery life can be greatly improved by reducing power consumption at the time of data transfer operation. It can be extended to
- the reflected wave transmission method which is a low power consumption wireless communication method
- the reflected wave reader side since the reflected wave is used, it is necessary for the reflected wave reader side to transmit the non-modulated carrier at the time of data transmission of the tag side power.
- the interference of the unmodulated carrier transmitted by the reflected wave reader with other wireless communication systems becomes a problem.
- the reflected wave reader needs to transmit a non-modulated carrier with relatively large power, so the power consumption during the transmission of the non-modulated carrier Will also grow.
- ISM inferstry Science Medical Medical
- a pedestal-like connection for installing devices called a "cradle"
- the cradle has an electrical contact point with the mounted mopil system and a direct connection means with the PC to realize data exchange between the two devices (see, for example, Patent Document 3).
- the cradle and the PC are Generally, they are serially connected using a USB (Universal Serial Bus) cable or the like.
- USB Universal Serial Bus
- the contact between the cradle and the mopile device is a contact type
- a digital 'camera when it is placed on a cradle, it is inconvenient to operate the digital' camera such as photographing, and it may lack operability depending on the design of the digital 'camera.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2004-56711
- Patent Document 2 Japanese Patent Application Laid-Open No. 01-182782
- Patent Document 3 Japanese Patent Application Laid-Open No. 2004-135119
- An object of the present invention is to preferably perform data communication using transmission of a non-modulated carrier of reflected wave reader side force and modulation of reflected wave based on switching operation of antenna load impedance on reflector side and the like. It is possible to provide an excellent wireless communication system that can
- a further object of the present invention is to provide an excellent wireless communication system, a cradle device and a portable device, which can connect the cradle device and the portable device without impairing the operability of the portable device. It is to provide.
- a further object of the present invention is an excellent wireless communication system capable of suppressing interference with other wireless systems in close proximity and wirelessly connecting a cradle device and a portable device.
- a cradle device and a portable device.
- the present invention has been made in consideration of the above problems, and is a wireless communication system that performs reflected wave transmission using modulation of a reflected wave to a radio wave, and carries data on the reflected wave to a received radio wave.
- Device for transmitting and transmitting a carrier wave and a cradle device for transmitting a carrier wave, receiving a reflected wave for the carrier wave, and demodulating transmission data from the portable device
- a wireless communication system characterized by comprising:
- system refers to a logical aggregation of a plurality of devices (or function modules for realizing a specific function), and each device or function module is a single unit. It does not matter whether there is any force in the case.
- the wireless communication system aims to realize low power consumption in a communication mode in which a transmission ratio occupies most of communication among devices which are limited to a relatively short distance. It performs wireless transmission using modulation of the reflected wave based on the back-scatterer method used in RFID.
- the RFID system itself is widely known in the art as an example of wireless communication means applicable at short range.
- a reflected wave transmission method as a communication means for transferring data stored in a mopile device such as image data taken with a digital camera to a host such as a PC.
- the host side in order to start data transfer, the host side must wait for reception while transmitting a carrier wave (non-modulated carrier) for generating a reflected wave, and power consumption at the time of standby is excessive.
- the 2.4 GHz band which is the ISM (Industry Science Medical Medical) band, is used, there is a problem that radio waves transmitted in a state of waiting for reception interfere with other wireless systems in proximity.
- a force can be connected between a mopile system device such as a digital camera and a host device such as a PC by maintenance of a contact between the force cradle and the mopile system device, and the cradle is placed in the cradle.
- a mopile system device such as a digital camera
- a host device such as a PC
- the present invention by mounting the function of the reflection wave reader of the reflection wave transmission method on the cradle and by mounting the function of the reflector on a portable device such as a digital camera, It enables communication between the cradle and portable devices without contact.
- the digital camera can modulate the reflected wave to the non-modulated carrier from the cradle device to transmit the reflected wave.
- reflected wave transmission for communication between the portable device and the cradle V, it becomes possible to communicate with the portable device even when it is at a certain distance from the cradle device, and the portable device can communicate even while communicating. There is no loss of operability of the equipment Absent.
- the cradle device may also transmit unmodulated carrier.
- the unmodulated carrier will be transmitted only when it is necessary to transmit an image to the host device (eg, PC) connected to the interface of the cradle device as well.
- the host device eg, PC
- the communication distance may be several centimeters or so, so it may be non-modulated carrier transmission with low power.
- the power of the digital camera is removed, by switching to non-modulated carrier transmission with high power, it becomes possible to perform transmission power control according to the required communication distance.
- interference with other wireless standards can be reduced, and power consumption of the cradle device can be reduced.
- the non-contact charging feature further improves maintenance because it eliminates contact points between the cradle device and the digital camera completely.
- contact type connection may be made, and the cradle device power may be switched to the reflection wave transmission method only when the digital camera is removed. Also in this case, transmission of unnecessary non-modulated carriers can be suppressed, interference with other wireless standards can be reduced, and power consumption can be reduced while the cradle device is waiting for reception.
- an excellent wireless communication system a cradle device and a portable device capable of connecting the cradle device and the portable device without impairing the operability of the portable device. can do.
- the present invention it is possible to suppress interference with other wireless systems in proximity, and to provide a cradle. It is possible to provide an excellent wireless communication system, a cradle device and a portable device capable of wirelessly connecting the device and the portable device.
- the portable device by transmitting a carrier wave from the cradle device and demodulating a modulated reflected wave from the portable device, the portable device can communicate with the cradle without contact even on the cradle device. It becomes possible. Also, since unmodulated carrier transmission can be performed with high power when leaving the cradle device, it is possible to avoid monopolization of the radio band and avoid interference with other wireless communication systems during communication on the cradle device. At the same time, energy saving can be achieved. In addition, the communication distance can be extended if necessary so that the user can hold the image capturing device at hand.
- FIG. 1 is a view showing an example of the configuration of a system according to an embodiment of the present invention.
- FIG. 2 is a view showing the configuration of a data transmission system between a cradle device 101, an image capturing device 201, and a host device 301.
- FIG. 3 is a diagram showing an example of a communication sequence in the data transmission system shown in FIG.
- FIG. 4 is a diagram showing an example of a communication sequence in the data transmission system shown in FIG.
- FIG. 5 is a view showing a modified example of the cradle device shown in FIG.
- Video output function unit 201 Imaging device
- low power consumption communication operation controls devices such as electric power products.
- the purpose is to realize large-capacity data transmission such as images, etc., and mutual communication, and wireless transmission is performed using reflected waves based on the back-scatterer method used in RFID.
- the RFID system itself is widely known in the art as an example of wireless communication means applicable only locally.
- Communication methods between the tag and the reader / writer include an electromagnetic coupling method, an electromagnetic induction method, a radio wave communication method, and the like.
- the present invention relates to a radio communication system using microwaves such as 2.4 GHz band among them.
- a reflected wave transmission method as a communication means for transferring image data captured by a digital camera to a PC.
- the host side in order to start data transfer, the host side must wait for reception while transmitting a carrier wave for generating a reflected wave, and power consumption at the time of standby is excessive.
- the 2.4 GHz band which is the ISM band
- radio waves transmitted statefully during reception standby may interfere with other wireless systems that are in proximity.
- the function of the reflection wave reader of the reflection wave transmission method is mounted on the cradle, and the function of the reflector is mounted on portable equipment such as a digital camera.
- portable equipment such as a digital camera.
- the digital camera can modulate the reflected wave to the non-modulated carrier from the cradle and transmit the reflected wave.
- reflected wave transmission for communication between the portable device and the cradle, it is possible to communicate with the portable device even if the distance between the portable device and the portable telephone is a certain distance. The operability of the mold device is not impaired.
- the push button which is an image capturing apparatus recognition function unit mounted on the cradle, is OF
- FIG. 1 shows an example of the configuration of a system according to an embodiment of the present invention.
- the illustrated system comprises a cradle device 101, an image capturing device 201 for capturing and storing moving or still images such as a digital camera, and a host device 301 for display output or image processing of image data such as a PC. .
- the image capturing device 201 is installed on the cradle device 101.
- the push 'button 104 which is an image capturing device recognition function unit mounted on the cradle device 101, is pressed and is in the ON state.
- the user has removed the image capturing device 201 from the cradle device 101.
- the push 'button 104 is in the OFF state, and the non-modulated carrier is transmitted from the cradle device.
- the image capturing device 201 changes the load impedance of the antenna according to the image data to be transmitted to the unmodulated carrier, and transmits the reflected wave.
- the cradle device 101 demodulates the reflected wave, and transfers the obtained image data to the host device 301. Then, the host device 301 displays and outputs the image sent from the image capturing device 101 on the screen on the display screen. Alternatively, print out from a printer (not shown) or perform network transmission to other network-connected host devices.
- FIG. 2 shows the configuration of a data transmission system between the cradle device 101, the image capturing device 201, and the host device 301.
- the cradle device 101 includes a communication function unit 102, a communication control unit 103, an image capturing device recognition function unit 104, and an interface unit 105.
- the image capturing device recognition function unit 104 is configured by a push 'button. For example, when the image capturing device 201 is placed on the cradle device 101, the push 'button 104 is turned on, and turned off when removed. This is transmitted to the communication control unit 102.
- the image capturing device recognition function unit 104 is, for example, a weight sensor that recognizes by weight that the image capturing device 201 is placed on the cradle device 101, and a bus that detects disconnection of a communication line or a power line. 'It may be a monitor.
- the communication function unit 102 transmits and receives wireless signals to and from the image capturing device 201.
- a reflected wave transmission method is adopted for data transmission with the image capturing device 201, and the communication function unit 102 behaves as a reflected wave reader.
- the interface unit 105 implements an interface 'protocol with the host device 301, and is used to transmit data acquired from the image capturing device 201 to the host device 301.
- the interface unit 105 is configured by USB, but is not particularly limited to this.
- a network interface such as Ethernet (registered trademark) or IEEE 1394 may be used, or a wired or wireless communication system other than these may be used.
- the image capturing apparatus 201 includes a communication function unit 202, a communication control unit 203, and a data storage unit 205, in addition to an image capturing function unit 204 that captures image data such as moving images or still images and performs image processing. ing.
- the image capturing device 201 is a digital 'camera, but may be a digital' video camera for capturing an image or an image. Alternatively, it may be an audio 'recorder with an audio recording function that handles audio data rather than image data, or a PDA or other type of portable device with data processing functions that handle other computer' data. Also good. Data handled by the device 201 is stored in the data storage unit 205.
- the data storage unit 205 may be a fixed storage device built in the image capturing device 201 or a removable portable medium such as a memory stack.
- the communication function unit 202 transmits / receives a radio signal to / from the cradle device 101.
- a reflected wave transmission method is adopted for data transmission with the cradle device 101 (same as above), and the communication function unit 202 behaves as a reflector.
- the communication function unit 202 receives the transmission image data read from the data storage unit 205 by the communication control unit 203, and performs on / off operation of the antenna switch connected to the antenna based on the data value. , Modulate the reflected wave by changing the antenna load impedance. For example, when the data is 1, switch 'on' and terminate the antenna with 50 ⁇ antenna load. Also, when the data is 0, the switch is off, the antenna is open, and the incoming radio wave is reflected. Due to the fluctuation of the antenna load impedance due to the on / off operation of the antenna switch, data transmission reflecting the unmodulated carrier from the cradle device 101 is performed. This reflected wave signal is equivalent to the ASK modulated wave.
- the communication function unit 102 on the cradle device 101 side transmits a non-modulated carrier and receives a reflected wave from the image capturing device 201.
- the received reflected wave is demodulated and passed to the host device 301 via the communication control unit 103 and the host 'interface unit 105.
- data communication from the image capturing device 201 to the cradle device 101 is performed.
- the host device is a PC, but it is not particularly limited to this.
- it may be a television receiver capable of displaying and outputting the received image on a display, or a printer for printing out the image.
- the communication function unit 102 of the cradle device 101 responds to an acknowledgment (ACK) or an acknowledgment (NACK) t, a negative acknowledgment to the image capturing device 201, or captures information from the host device 301 as an image capturing device.
- Downlink data transmission to the image capturing apparatus 201 may be performed in order to transmit the data to 201.
- wireless data transmission with ASK modulation may be performed in consideration of the ease of detection on the image capturing device 201 side.
- the communication function unit 202 of the image capturing device 201 demodulates and receives, for example, ASK modulated wireless data. A little.
- bit rate modulation scheme In the uplink to the reflector power reflected wave reader, low values such as ASK and BPSK Although a bit rate modulation scheme is common, the scope of the present invention is not limited to this.
- modulating the reflected wave in addition to the operation of the load impedance such as antenna termination processing, by giving a phase difference on the signal path where the reflected wave reciprocates, higher bit rates such as QPSK and 8-phase PSK modulation can be achieved. Modulation scheme can be realized.
- Japanese Patent Application No. 2003-352223 which has already been assigned to the present applicant, discloses a back'scanner communication system incorporating QPSK modulation processing.
- FIG. 5 shows another configuration example of the cradle device 101.
- the illustrated cradle apparatus 101 is shown in FIG. 2 in that the interface unit 105 for connecting to the host device 301 is configured with a network interface for connecting to a network 401 such as Ethernet (registered trademark). It is different from.
- the cradle device 101 shown in the figure is an audio / video processing function unit 106 that decodes video / audio data such as MPEG format received from the communication function unit 102, a decoded video / audio data, a TV receiver, etc. It also includes an audio / video output function unit 107 having a video 'audio output terminal etc. to be output.
- FIG. 3 shows an example of a control sequence of the cradle device 101, the image capturing device 201, and the host device 301 in the data transmission system shown in FIG.
- the user removes the image capturing device 201 from the cradle device 101 and starts non-modulated carrier transmission.
- the sequence is shown. Also, it is assumed that the host device 301 displays the transferred image.
- the image capturing device 201 is placed on the cradle device 101.
- the push button 104 which is the image capturing device recognition function unit 104 on the cradle device 101, is turned off, and the communication control unit 103 is notified.
- the communication control unit 103 controls the communication function unit 102 to transmit an unmodulated carrier.
- the image capturing apparatus 201 that receives the non-modulated carrier is reflected by the communication control unit 203 changing the load impedance of the antenna of the communication function unit 202 according to the image data stored in the data storage unit 205. Modulate the wave to transmit data.
- 405 The image data transmission ends.
- the communication function unit 103 of the cradle device 101 transmits the received image data from the interface unit 105 to the PC, which is the host device 301, via the USB cable.
- the cradle device 101 stops unmodulated carrier transmission.
- data transmission is performed by the image capturing device 201 receiving a non-modulated carrier and modulating the reflected wave.
- the transmission permission may be requested to the cradle apparatus 101 before the data transmission, and the data transmission may be started after confirming the reply.
- the communication function unit 102 of the cradle device 101 needs to have a function of performing ASK modulation and transmitting, for example, in order to transmit the transmission permission signal.
- the communication function unit 202 needs to have a function of performing ASK detection on the received radio wave and performing data demodulation, for example.
- the data communication may be communication using a packet, or the cradle device 101 may return an Ack for each packet.
- the cradle device 101 and the image capturing device 201 are separated from each other in the initial state, and when the user installs the image capturing device 201 in the cradle device 101, small power is used for short distance communication.
- 7 shows an example of a communication sequence in the case of transmitting the non-modulated carrier and transmitting the non-modulated carrier with high power for long distance communication when the user removes the image capturing device 201 from the cradle device 101.
- the host device displays the transferred image.
- the image capturing device 201 and the cradle device 101 move apart.
- the push button as the image capturing device recognition function unit 104 on the cradle device 101 is turned ON, and the communication control unit 103 is notified.
- the communication control unit 103 controls the communication function unit 102 to transmit a low power non-modulated carrier for short distance communication.
- the communication control unit 203 In the image capturing device 201 that has received the non-modulated carrier, the communication control unit 203 According to the transmission image data read from the storage unit 205, the load impedance of the antenna of the communication function unit 202 is changed to modulate the reflected wave, and data transmission is performed as a reflected wave signal.
- the communication function unit 103 of the cradle device 101 transmits image data from the interface unit 105 to the PC as the host device 301 via the USB cable.
- the PC displays the received image data on the screen.
- the image capture device recognition function unit 104 of the cradle device 101 is a push 'button
- the communication control unit 103 is notified of the OFF state.
- the communication control unit 103 controls the communication function unit 102 to transmit an unmodulated carrier with high power for long-distance communication.
- the image capturing apparatus 201 having received the non-modulated carrier causes the communication control unit 203 to change the load impedance of the antenna of the communication function unit 202 according to the transmission image data read from the data storage unit 205. It modulates the reflected wave and transmits data as a reflected wave signal.
- the communication function unit 103 of the cradle apparatus 101 transmits image data from the interface unit 105 to the PC as the host device 301 via the USB cable.
- the PC displays the received image data on the screen.
- the cradle device 101 stops transmission of the non-modulated carrier after the elapse of a fixed time.
- the portable device and two devices other than the cradle device are connected by the reflected wave transmission method, the same function and effect can be obtained by applying the present invention.
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Human Computer Interaction (AREA)
- Computing Systems (AREA)
- Computer Hardware Design (AREA)
- Studio Devices (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2005800209181A CN1973443B (zh) | 2004-06-25 | 2005-05-16 | 无线通信***、托架装置及便携式设备 |
US11/630,046 US7697892B2 (en) | 2004-06-25 | 2005-05-16 | Wireless communication system, cradle apparatus, and portable device |
EP05739240.9A EP1760899B1 (en) | 2004-06-25 | 2005-05-16 | Wireless communications system, cradle unit, and mobile device |
KR1020067027031A KR101156270B1 (ko) | 2004-06-25 | 2005-05-16 | 크래들 장치, 및 휴대형 기기 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-187409 | 2004-06-25 | ||
JP2004187409A JP4039398B2 (ja) | 2004-06-25 | 2004-06-25 | 無線通信システム、クレードル装置、並びに携帯型機器 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006001133A1 true WO2006001133A1 (ja) | 2006-01-05 |
Family
ID=35780555
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/008903 WO2006001133A1 (ja) | 2004-06-25 | 2005-05-16 | 無線通信システム、クレードル装置、並びに携帯型機器 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7697892B2 (ja) |
EP (1) | EP1760899B1 (ja) |
JP (1) | JP4039398B2 (ja) |
KR (1) | KR101156270B1 (ja) |
CN (1) | CN1973443B (ja) |
WO (1) | WO2006001133A1 (ja) |
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EP1848117A2 (en) * | 2006-04-21 | 2007-10-24 | Canon Kabushiki Kaisha | Communication apparatus and transmission power control method thereof |
US11837399B2 (en) | 2008-03-17 | 2023-12-05 | Powermat Technologies, Ltd. | Transmission-guard system and method for an inductive power supply |
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JP5136170B2 (ja) * | 2007-04-20 | 2013-02-06 | ソニー株式会社 | データ通信システム、携帯電子機器、サーバ装置、およびデータ通信方法 |
US20090109294A1 (en) * | 2007-10-26 | 2009-04-30 | Greg Allen Cummings | User interface for a portable digital video camera |
JP5049900B2 (ja) | 2008-06-30 | 2012-10-17 | キヤノン株式会社 | 設定装置、画像出力装置、それらの制御方法及びプログラム |
EP2374193A1 (en) * | 2009-01-06 | 2011-10-12 | Access Business Group International LLC | Communication across an inductive link with a dynamic load |
US20110099507A1 (en) | 2009-10-28 | 2011-04-28 | Google Inc. | Displaying a collection of interactive elements that trigger actions directed to an item |
US9154002B2 (en) * | 2010-01-25 | 2015-10-06 | Access Business Group International Llc | Systems and methods for detecting data communication over a wireless power link |
TW201236301A (en) | 2010-12-08 | 2012-09-01 | Access Business Group Int Llc | System and method for providing communications in a wireless power supply |
CN103460615B (zh) | 2011-02-07 | 2016-04-27 | 捷通国际有限公司 | 提供无线电力传输***中的通信的***及方法 |
US9344155B2 (en) | 2012-01-08 | 2016-05-17 | Access Business Group International Llc | Interference mitigation for multiple inductive systems |
JP5578203B2 (ja) * | 2012-07-13 | 2014-08-27 | 株式会社バッファロー | 通信装置、通信システムおよび通信方法 |
CN104937852B (zh) * | 2012-12-13 | 2017-11-21 | 诺基亚技术有限公司 | 用于对移动装置进行外部控制的方法和设备 |
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- 2005-05-16 CN CN2005800209181A patent/CN1973443B/zh not_active Expired - Fee Related
- 2005-05-16 US US11/630,046 patent/US7697892B2/en not_active Expired - Fee Related
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US11837399B2 (en) | 2008-03-17 | 2023-12-05 | Powermat Technologies, Ltd. | Transmission-guard system and method for an inductive power supply |
Also Published As
Publication number | Publication date |
---|---|
KR101156270B1 (ko) | 2012-06-13 |
EP1760899A1 (en) | 2007-03-07 |
KR20070028443A (ko) | 2007-03-12 |
JP2006013844A (ja) | 2006-01-12 |
US20070237123A1 (en) | 2007-10-11 |
CN1973443B (zh) | 2012-06-20 |
EP1760899B1 (en) | 2018-08-15 |
CN1973443A (zh) | 2007-05-30 |
JP4039398B2 (ja) | 2008-01-30 |
EP1760899A4 (en) | 2013-01-09 |
US7697892B2 (en) | 2010-04-13 |
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