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Data transmission device, data transmission system, and method

A data transmission system and data transmission technology, applied in the field of data transmission equipment, can solve the problems of difficult power consumption limitation, inability to realize zero power mode, etc.

Inactive Publication Date: 2005-12-14
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the zero power mode as described above, the power of the transmission part and the reception part of the data transmission device is kept on, and it is difficult to limit the power consumption to zero
In other words, the zero-power mode that only turns off the processing parts of the data transmission device and the power supply of the connected device cannot achieve the basic purpose of the zero-power mode

Method used

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  • Data transmission device, data transmission system, and method
  • Data transmission device, data transmission system, and method
  • Data transmission device, data transmission system, and method

Examples

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Embodiment Construction

[0033] refer to figure 1 , describes a data transmission system according to an embodiment of the present invention. figure 1 is a block diagram showing the configuration of a data transmission system.

[0034] exist figure 1 In , the data transmission system uses a ring topology as its physical topology, in which a plurality of nodes are connected in accordance with the ring topology, thereby forming a unidirectional ring LAN. An example of such a data transmission system will be described below, in which the nodes are six data transmission devices 1a to 1f, which are connected via transmission lines 80a to 80f to form a ring structure, and the transmitted data is unidirectionally via the transmission lines 80a to 80f. sent at 80f. Connected devices (for example, audio equipment, navigation devices, or information terminal devices) 10a to 10f connected to the data transmission devices 1a to 1f each perform processing based on data transmitted through the data transmission...

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PUM

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Abstract

A data transmission device (1) includes a controller (2), a receiving unit (5), a sending unit (6) and an MPU (3). The receiving part (5) receives the electric signal sent from the previous device, and outputs its data to the controller (2). The sending part (6) converts the processing result of the controller (2) into an electric signal, and sends it to a subsequent device. The MPU (3) controls the operations of the controller (2), the receiving unit (5) and the sending unit (6) according to the operating mode of the device. The receiving means (5) detects a cessation of transmission of an electrical signal from a previous device, and in response to the detection, stops operation. In response to said detection, said sending means (6) stops operating and stops sending said electrical signal to said successor device.

Description

technical field [0001] The present invention relates to a data transmission device, a data transmission system and a method, and more particularly, to such a data transmission device, a data transmission system and a method thereof, wherein the data transmission device transmits The wires are connected so as to form a ring structure, and in this ring the devices can communicate electrically with each other in one direction. Background technique [0002] In recent years, large-capacity and high-speed communication is required for car navigation or Internet access (for example, ITS (Intelligent Transport Systems, Intelligent Transport System)), or when image information is transmitted in a space such as the interior of a car. Much research is being conducted on communication systems for transmitting such digitized video or audio data, or digital data such as computer data. Moreover, it is becoming more and more common to introduce networks for transmitting digital data into e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/42
CPCH04L12/10H04L12/40039H04L12/42H04L2012/40273
Inventor 水口裕二安井伸彦胜田升堺贵久高平丰河田浩嗣梅井俊智秋田贵志
Owner PANASONIC CORP