US 6,205,156 B1Granted

Method and device for data transmission and reception using transmission pause state as reception timing

AssigneeNippon Telegraph and Telephone Corporation

InventorsTomoki Watanabe, Hironobu Fukunaga, Keiko Kumagai, Kazuhiro Hayakawa, Tatsuo Suzuki, Katsumi Kishida, Kazuo Tanaka

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Abstract

A data transmission and reception scheme capable of reducing required devices in the data transmission and reception system for an economical advantage, realizing the concurrent data delivery to a plurality of data reception devices, and allowing each one of a plurality of data reception devices to start the data reception at arbitrary timing. In a system for transmitting data from a data transmission device to unspecified many data reception devices that make asynchronous connections, the data transmission device carries out the repetitive transmission by repeating the operations of transmitting a prescribed amount of data to be transmitted by applying a prescribed signal conversion and then pausing the signal conversion processing for a prescribed period of time so as to provide a transmission pause state in the transmission signals which is to be utilized as a reception timing at each data repcetion device. At each data reception device, the transmission pause state in the transmission signals are detected at an arbitrary timing, and the reception of the transmission data is started by using the detected transmission pause state as the reception timing.

Claims7

Dependent claims

A data transmission and reception method for carrying out data transmission and reception between a data transmission device and unspecified many data reception devices that make asynchronous connections, comprising:

a first step for applying a prescribed signal conversion to a prescribed amount of transmission data to obtain transmission signals, and transmitting the transmission signals, at the data transmission device;
a second step for pausing the signal conversion for a prescribed period of time after the first step so as to provide a transmission pause state in the transmission signals which is to be utilized as a reception timing at each data reception device, at the data transmission device;
a third step for carrying out a repetitive transmission by repeating the first step and the second step, at the data transmission device;
a fourth step for detecting the transmission pause state provided in the transmission signals, at each data reception device;
and
a fifth step for receiving the transmission data by starting a data conversion of received transmission signals, by using the transmission pause state detected by the fourth step as a reception timing, at each data reception device;
wherein the first step transmits the transmission data formed by information contents, by specifying a display time by which each information content is to be displayed at each data reception device, and the fifth step acquires the display time specified for each information content contained in received transmission data and displays each information content when the display time comes while starting a reception of a next information content.

4 more elements

Dependencies are inferred from the claim text.