Radio communication system, radio communication apparatus and radio communication method as well as computer program

• US 7,949,258 B2
• Filed: 05/16/2005
• Issued: 05/24/2011
• Est. Priority Date: 06/28/2004
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Fukuda, Kunio
• Primary Examiner(s): Vanderpuye; Ken N
• Assistant Examiner(s): Jacob; Oommen
• Application Number:
  US11/629,416
• Publication Number:
  US 20080298808A1
• Time in Patent Office: 2,199 Days
• Field of Search: 398/106, 398107-114
• US Class Current: 398/106
• CPC Class Codes: G08C 2201/40 Remote control systems using repeaters, converters, gateways
• CPC Class Codes: G08C 23/04 using light waves, e.g. infrared
• CPC Class Codes: H04B 1/59 Responders; Transponders
• CPC Class Codes: H04B 10/1149 Arrangements for indoor wireless networking of information
• CPC Class Codes: H04L 12/2803 Home automation networks
• CPC Class Codes: H04L 12/282 based on user interaction within the home receiver circuitry for displaying additional information being controlled by a remote control apparatus H04N21/42204
• CPC Class Codes: H04L 2012/2841 Wireless

Abstract

It is possible to realize remote control in a reflection wave transmission system, and enhance operability for a mobile apparatus having a reflector. The mobile apparatus comprises a reflector and performs reflection wave transmission by carrying data on a reflection wave for unmodulated carrier. A reflection wave reader comprises an infrared light receiving section, receives and decodes a request signal sent as an infrared remote control command, transmits it to the mobile apparatus by an ASK modulated signal and then transmits the unmodulated carrier. The mobile apparatus transmits requested data by reflection wave. The mobile apparatus can be operated from an infrared remote controller and remote control distance can be extended.

Claims

1. A back scatter type radio communication system comprising a reflected wave reader and a reflector, in which the reflected wave reader is operable to transmit a carrier and in which the reflector is operable to cause a reflected wave to be transmitted which is formed by modulating the carrier in accordance with transmission data that includes Joint Photographic Experts Group (JPEG) data generated by a digital camera, wherein

said reflected wave reader includes an infrared reception section configured to receive an infrared command, a demodulator section for demodulating the reflected wave received from the reflector, an image decoding section for decoding the JPEG data received from the reflector into an analog visual signal, and

an infrared command decoding section configured to decode the infrared command and controls a reflected wave transmission action in response to the infrared command.

2. The back scatter type radio communication system according to claim 1, wherein

said reflected wave reader modulates the carrier with the substance of the infrared command and transmits the modulated carrier to said reflector.

3. The back scatter type radio communication system according to claim 2, wherein

said reflector places the transmission data on the reflected wave of the carrier from said reflected wave reader in accordance with an instruction of the infrared command received through said reflected wave reader and transmits the transmission data together with the reflected wave.

4. The back scatter type radio communication system according to claim 3, wherein

said reflected wave reader provides data received from said reflector to an external apparatus.

5. A reflected wave reader usable in a back scatter type radio communication system which performs reflected wave communication making use of modulation of a reflected wave, from a reflector, of a carrier, comprising:

a transmission section configured to transmit the carrier;

a reception section configured to perform a reception process of the modulated reflected wave, from said reflector, of the transmitted carrier, said modulated reflected wave modulated with JPEG data generated by a digital camera;

an infrared reception section configured to receive an infrared command;

an infrared command decoding section configured to decode the infrared command; and

a communication control section configured to control a reflected wave transmission action in response to the infrared command, and,

wherein said reception section further comprises demodulating said reflected wave and decoding the JPEG data into analog visual data.

6. The reflected wave reader according to claim 5, wherein

said communication control section modulates the carrier with a data request requested by the infrared command and transmits the modulated carrier to said reflector.

7. The reflected wave reader according to claim 6, wherein

said communication control section receives the data requested by the infrared command through reflected wave transmission from said reflector.

8. The reflected wave reader according to claim 7, further comprising:

an external apparatus connection section configured to connect an external apparatus which utilizes data; and

wherein

said communication control section provides the data received from said reflector by the reflected wave transmission to the external apparatus.

9. A radio communication method for use by a reflected wave reader usable in a back scatter type communication system for performing reflected wave communication making use of modulation of a reflected wave, from a reflector, of a carrier, comprising:

an infrared reception step of receiving an infrared command;

an infrared command decoding step of decoding the infrared command; and

a reflected wave transmission step of performing a transmission action of the reflected wave or data from said reflector and a reception action of the reflected wave from said reflector in response to the infrared command, wherein said reflected wave from said reflector is modulated with JPEG data generated by a digital camera, and wherein said reception action further comprises demodulating said reflected wave and decoding the JPEG data into analog visual data by said reflected wave reader.

10. The radio communication method according to claim 9, wherein,

at the reflected wave transmission steps, a data request requested by the infrared command is transmitted to said reflector.

11. The radio communication method according to claim 10, wherein,

at the reflected wave transmission step, the data requested by the infrared command is transmitted by reflected wave transmission from said reflector.

12. The radio communication method according to claim 11, further comprising:

a data providing step of providing the data received from said reflector by the reflected wave transmission to an external apparatus.

13. A back scatter type radio communication system comprising:

a camera section for capturing image data;

a signal processing section for converting said image data into a predetermined digital format;

a Universal Serial Bus (USB) interface section for interfacing with an external PC and for transferring said converted image data to said external PC; and

,

a radio transmission module including a reflector and an antenna, wherein said reflector is configured to receive, via said antenna, a carrier wave from a reflected wave reader and to transmit, via said antenna, a reflected wave back to said reflected wave reader using back scatter communication, where said reflected wave is formed by modulating said carrier with said converted image data, and wherein said reflected wave reader includes a demodulator section for demodulating the reflected wave received from the reflector, and an image decoding section for decoding JPEG data received from the reflector into an analog visual signal.