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Data communication system, data transmitting apparatus, data receiving apparatus, data communication method and data communication program

A technology of a data sending device and a data receiving device, which is applied in the field of data communication programs, can solve problems such as the increase of leakage electric field, and achieve the effect of improving communication quality

Inactive Publication Date: 2007-08-29
MITSUBISHI MATERIALS CORP
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  • Abstract
  • Description
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Problems solved by technology

However, when the transmission power is increased to increase the SN ratio, there is a problem that the leakage electric field becomes larger

Method used

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  • Data communication system, data transmitting apparatus, data receiving apparatus, data communication method and data communication program
  • Data communication system, data transmitting apparatus, data receiving apparatus, data communication method and data communication program
  • Data communication system, data transmitting apparatus, data receiving apparatus, data communication method and data communication program

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Embodiment Construction

[0034] Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

[0035] FIG. 2 is a configuration diagram of a data communication system 10 according to the first embodiment of the present invention.

[0036] The data communication system 10 is composed of a power line 1 , a data transmission device 2 , and a data reception device 3 .

[0037] The data transmission device 2 is connected to the power line 1 . Electric power for driving the data transmission device 1 is supplied from the power line 1 to the data transmission device 2 . In addition, the data transmitting device 2 transmits and receives data to and from the data receiving device 3 via the power line 1 .

[0038] The data receiving device 3 is connected to the power line 3 . Power for driving the data receiving device 3 is supplied from the power line 1 to the data receiving device 3 . In addition, the data receiving device 3 transmits and receives data to and ...

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Abstract

There is provided a data communication system that performs power line communication having satisfactory communication quality by disposing data in channels where notches or noises do not exist in a distributed manner. There is included a step S01 of transmitting a pilot tone from a data transmitting device to a data receiving device, a step S03 of detecting a frequency band where a notch exists, among frequency bands used for the power line communication, on the basis of the pilot tone by means of the data receiving device, a step S05 of transmitting information on the frequency band where the notch exists, as channel information, to the data transmitting device by means of the data receiving device, a step S07 of setting a channel, which is located within a frequency band where a notch does not exist, as a channel used for the power line communication, by means of the data transmitting device, and a step S09 of disposing data, which is to be transmitted, in each channel and then transmitting the data to the data receiving device, by means of the data transmitting device.

Description

technical field [0001] The present invention relates to a data communication system, a data sending device, a data receiving device, a data communication method, and a data communication program for performing data communication through power lines. Background technique [0002] Conventionally, there is known a method of performing communication by selecting a subchannel to be used when a notch causing deterioration of communication quality exists in part of frequencies used for communication (see Patent Document 1). [0003] In the communication method described in Patent Document 1, in order to improve the communication quality of audio data and visual data, a notch-free channel is used for communication. In this communication method, in order to increase the SN ratio (signal-to-noise ratio) of the channel used, it is necessary to increase the transmission power. However, when the transmission power is increased to increase the SN ratio, there is a problem that the leakag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B3/54H04J1/16
Inventor 山下信之田里和义中村贤藏
Owner MITSUBISHI MATERIALS CORP
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