Communication system, communication device, wired communication device, and communication method

• US 20060198364A1
• Filed: 03/06/2006
• Published: 09/07/2006
• Est. Priority Date: 03/07/2005
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Fujii, Kunihide
• Granted Patent: US 7,835,338 B2
• Time in Patent Office: Days
• US Class Current: 370/352
• CPC Class Codes: H04L 27/02 Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation H04L27/32 takes precedence
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: H04W 92/08 between user and terminal device

Abstract

A communication system includes a wired communication device and a communication device that can communicate with a wireless communication device and the wired communication device. The communication device includes a clock output unit and a modulator. The wired communication device includes a clock extracting unit, a signal extracting unit, and a processing unit. The communication device and the wired communication device are connected to each other by a first connecting line through which a modulated signal is sent from the communication device to the wired communication device, and a second connecting line, which is different from the first connecting line, through which a signal is sent from the wired communication device to the communication device.

Claims

1. A communication system comprising:

a wired communication device that performs wired communication; and

a communication device that is capable of communicating with both a wireless communication device that performs wireless communication and the wired communication device,

the communication device including

a clock output unit operable to output a clock to be supplied to the wired communication device, and

a modulator operable to perform amplitude shift keying modulation on the clock by using a signal corresponding to data to be sent to the wired communication device as a modulation subject signal and to output a resulting modulated signal,

the wired communication device including

a clock extracting unit operable to extract the clock from the modulated signal,

a signal extracting unit operable to extract the modulation subject signal from the modulated signal, and

a processing unit operable to process the modulation subject signal extracted by the signal extracting unit in accordance with the clock extracted by the clock extracting unit and also to output a signal corresponding to data to be sent to the communication device,

wherein the communication device and the wired communication device are connected to each other by,

a first connecting line through which the modulated signal output from the modulator is sent from the communication device to the wired communication device, and

a second connecting line, which is different from the first connecting line, through which the signal output from the processing unit is sent from the wired communication device to the communication device.

2. A communication device that is capable of communicating with both a wireless communication device that performs wireless communication and a wired communication device that performs wired communication, the communication device comprising:

a clock output unit operable to output a clock to be supplied to the wired communication device; and

a modulator operable to perform amplitude shift keying modulation on the clock by using a signal corresponding to data to be sent to the wired communication device as a modulation subject signal and to output a resulting modulated signal,

wherein the communication device is connected to the wired communication device by,

a first connecting line through which the modulated signal output from the modulator is sent from the communication device to the wired communication device, and

a second connecting line, which is different from the first connecting line, through which a signal corresponding to data to be sent from the wired communication device to the communication device is sent from the wired communication device to the communication device.

3. The communication device according to claim 2, wherein, when the communication device modulates a carrier wave by using a signal obtained by coding data according to a predetermined coding method to send the data to the wireless communication device, the modulation subject signal is a signal obtained by coding data according to the predetermined coding method, and the signal corresponding to the data to be sent from the wired communication device to the communication device is also a signal obtained by coding the data according to the predetermined coding method.

4. A communication method for a communication device that is capable of communicating with both a wireless communication device that performs wireless communication and a wired communication device that performs wired communication,

the communication device including

a clock output unit operable to output a clock to be supplied to the wired communication device, and

a modulator operable to perform amplitude shift keying modulation on the clock by using a signal corresponding to data to be sent to the wired communication device as a modulation subject signal and to output a resulting modulated signal, the communication method comprising the steps of:

performing amplitude shift keying modulation on the clock by the modulation subject signal to output the modulated signal by using the modulator;

sending the modulated signal to the wired communication device through a first connecting line through which the modulated signal output from the modulator is sent from the communication device to the wired communication device; and

receiving the signal sent from the wired communication device through a second connecting line, which is different from the first connecting line, through which a signal corresponding to data to be sent from the wired communication device to the communication device is sent from the wired communication device to the communication device.

5. A wired communication device that performs wired communication with a communication device that is capable of communicating with both a wireless communication device that performs wireless communication and the wired communication device, the wired communication device comprising:

a clock extracting unit operable to extract a clock from a modulated signal which is obtained by performing amplitude shift keying modulation on the clock by using a signal corresponding to data as a modulation subject signal and which is sent from the communication device;

a signal extracting unit operable to extract the modulation subject signal from the modulated signal; and

a processing unit operable to process the modulation subject signal extracted by the signal extracting unit in accordance with the clock extracted by the clock extracting unit and also to output a signal corresponding to data to be sent to the communication device,

wherein the wired communication device is connected to the communication device by,

a first connecting line through which the modulated signal output from the communication device is sent from the communication device to the wired communication device, and

a second connecting line, which is different from the first connecting line, through which the signal output from the processing unit is sent from the wired communication device to the communication device.

6. A communication method for a wired communication device that performs wired communication with a communication device that is capable of communicating with both a wireless communication device that performs wireless communication and the wired communication device,

the wired communication device including

a clock extracting unit operable to extract a clock from a modulated signal which is obtained by performing amplitude shift keying modulation on the clock by using a signal corresponding to data as a modulation subject signal and which is sent from the communication device,

a signal extracting unit operable to extract the modulation subject signal from the modulated signal, and

a processing unit operable to process the modulation subject signal extracted by the signal extracting unit in accordance with the clock extracted by the clock extracting unit and also to output a signal corresponding to data to be sent to the communication device, the communication method comprising the steps of:

receiving the modulated signal from the communication device by the wired communication device through a first connecting line through which the modulated signal output from the communication device is sent;

extracting the clock from the modulated signal by the clock extracting unit and extracting the modulation subject signal from the modulated signal by the signal extracting unit; and

sending the signal output from the processing unit from the wired communication device to the communication device through a second connecting line, which is different from the first connecting line, through which the signal output from the processor is sent.