Multiplex communications – Communication techniques for information carried in plural... – Assembly or disassembly of messages having address headers
Reexamination Certificate
1997-10-14
2001-03-20
Nguyen, Chau (Department: 2663)
Multiplex communications
Communication techniques for information carried in plural...
Assembly or disassembly of messages having address headers
C370S454000, C370S474000
Reexamination Certificate
active
06205156
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a data transmission and reception technique, and more particularly, to a method and a device for data transmission and reception for realizing a data delivery from a single data transmission device to a plurality of data reception devices as well as a simultaneous data delivery to a plurality of data reception devices economically.
2. Description of the Background Art
A conventional technique in a case of transmitting and receiving data using a communication channel is that, after a physical line is connected and a procedure to make a preparation for the data transmission and reception is carried out, the transparent one-to-one data communication is carried out while maintaining a logical connection state. Also, in a case of communications in the speech bandwidth as in a case of general subscriber telecommunications, the modulation and demodulation (modem) technique for converting digital data into analog signals in the speech bandwidth or vice versa is used. As the standard for this modulation and demodulation, V,21, V.22, V.22bis, V.32, V.32bis, V.34, etc. are defined for the data communications, but these standards are all for realizing the one-to-one bi-directional data communications.
However, the above described conventional scheme is not economical in a case of carrying out the data transmission and reception between one data transmission device and a plurality of data reception devices, because it requires as many devices (such as modems) as a total number of data transmitting and receiving pairs involved. In addition, when a plurality of reception requests are made simultaneously, there can be a problem in that the devices on the transmitting side may run out short so that it may not be possible to receive the requested data.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a method and a device for data transmission and reception which are 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.
According to one aspect of the present invention there is provided a data transmission method for transmitting data from a data transmission device to 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; 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; and a third step for carrying out a repetitive transmission by repeating the first step and the second step.
According to another aspect of the present invention there is provided a data reception method for receiving transmission signals of transmission data transmitted from a data transmission device at each data reception device among unspecified many data reception devices that make asynchronous connections, comprising: a first step for detecting a transmission pause state provided in the transmission signals by the data transmission device; and a second step for receiving the transmission data by starting a data conversion of received transmission signals, by using the transmission pause state detected by the first step as a reception timing.
According to another aspect of the present invention there is provided 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.
According to another aspect of the present invention there is provided a data transmission device for transmitting data to unspecified many data reception devices that make asynchronous connections, comprising: a signal conversion unit for applying a prescribed signal conversion to a prescribed amount of transmission data to obtain transmission signals, and transmitting the transmission signals; and a control unit for controlling the signal conversion unit so that the signal conversion is paused for a prescribed period of time after a signal transmission by the signal conversion unit 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, and a repetitive transmission is carried out by repeating the signal transmission and a pause.
According to another aspect of the present invention there is provided a data reception device for receiving transmission signals of transmission data transmitted from a data transmission device to unspecified many data reception devices that make asynchronous connections, comprising: a pause detection unit for detecting a transmission pause state provided in the transmission signals by the data transmission device; and a data conversion unit for receiving the transmission data by applying a data conversion to received transmission signals; and a control unit for controlling the data conversion unit so as to start the data conversion of received transmission signals by using the transmission pause state detected by the pause detection unit as a reception timing.
Other features and advantages of the present invention will become apparent from the following description taken in conjunction with the accompanying drawings.
REFERENCES:
patent: 4712214 (1987-12-01), Meltzer et al.
patent: 4774707 (1988-09-01), Raychaudhuri
patent: 5193151 (1993-03-01), Jain
patent: 5259000 (1993-11-01), Kojima et al.
patent: 5384770 (1995-01-01), Mays et al.
patent: 5394392 (1995-02-01), Scott
patent: 5422883 (1995-06-01), Hauris et al.
patent: 5440545 (1995-08-01), Buchholz et al.
patent: 5463616 (1995-10-01), Kruse et al.
patent: 5577043 (1996-11-01), Guo et al.
patent: 5611038 (1997-03-01), Shaw et al.
patent: 5654969 (1997-08-01), Wilhelmsson
patent: 5682386 (1997-10-01), Arimilli et al.
patent: 5699361 (1997-12-01), Ding et al.
Fukunaga Hironobu
Hayakawa Kazuhiro
Kishida Katsumi
Kumagai Keiko
Suzuki Tatsuo
Kilpatrick & Stockton
Lee Chiho Andrew
Nguyen Chau
Nippon Telegraph and Telephone Corporation
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