Multiplex communications – Communication techniques for information carried in plural... – Adaptive
Reexamination Certificate
1997-05-30
2001-06-05
Jung, Min (Department: 2663)
Multiplex communications
Communication techniques for information carried in plural...
Adaptive
C370S477000, C709S232000
Reexamination Certificate
active
06243392
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a client-optimized data transmission system and method in various transmission environments in which many computers of various kinds are mutually connected. Particularly, this invention relates to a data transmission system and method which satisfies users accessing a data transmission service.
2. Description of the Related Art
Since data networks among computers, e.g., the Internet, have become popular, data providing services, e.g., World Wide Web (WWW), have also become popular. In a data providing service, data to be provided is loaded on a server computer (a server, hereinafter) which is connected to the Internet, and a large number of general users, i.e. client computers (clients, hereinafter) are connected to the server via the Internet. The clients request the server to transmit data and obtain the data.
Normally, in the WWW, a current WWW server sends the same data at the request of a client regardless of the condition of a transmission line which connects the server and the client and regardless of the client's ability to receive and process the data. Otherwise, the WWW server requests the client to select a data set, and sends the data set to the client.
In this method, even when lines are busy or the client is a wireless terminal with a very low transmission rate or the client does not have an image display function, unnecessary data, e.g., image data for a client which does not have an image display function, is sent to the client. This is irritating for the users. Therefore, the users often give up obtaining data from the WWW.
A conventional technique for controlling a transmission rate between computers is disclosed in Japanese Unexamined Published Patent Application SHO 60-59841. More particularly, SHO 60-59841 discloses a technique which optimizes a transmission rate between the computers by obtaining a desired transmission rate from a receiving computer and transmitting data at the desired transmission rate of the receiving computer.
In Japanese Unexamined Published Patent Application HEI 6-224877, a conventional technique for controlling a number of transmission lines based on an amount of data to be transmitted is disclosed.
As discussed above, conventional servers, such as the WWW server send data to the client regardless of the transmission rate of the line between computers and the ability of the client. This causes inconvenience for the users. This invention intends to solve such inconvenience for the users accessing data providing services.
SUMMARY OF THE INVENTION
One object of the present invention is to provide a data transmission system and method which satisfies users in a data transfer between computers in a client-server configuration.
Another object of the present invention is to provide a data transmission system and method which satisfies users accessing a data providing service.
Another object of the present invention is to remove inconvenience due to a low transmission rate of a line and inconvenience due to ignorance of the server regarding various individual client characteristics.
Another object of the present invention is to provide a data transmission system and method which satisfies the users accessing a data providing service by converting data which is provided by the server of the data providing service to data with a proper data amount and data type for each of the clients or by generating such data.
Another object of the present invention is to provide a data transmission system and method which satisfies the users in any environment by sending the data from the server to the client after modifying data according to client characteristics and a transmission rate of a communication line.
According to one aspect of this invention, data is transmitted from a server, which stores the data in a client that requests the data via a transmission line. The data transmission system includes an information collector, which collects information about the client at the server and a selective transmitter, which determines the amount of data that can be transmitted to the client based upon the information collected by said information collector, selects transmitting data from the data stored by the server based on the amount of data and transmits the transmitting data selected to the client.
According to another aspect of this invention, data is transmitted from a server, which stores the data a client that requests the data via a transmission line. The data transmission method includes a step for collecting information on the client at the server and a step for determining an amount of data that can be transmitted to the client based on the information collected in said information collecting step, and selecting transmitting data from the data stored by the server based upon the amount of data and transmitting the transmitting data selected to the client.
Further scope of applicability of the present invention will become apparent from the detailed description give hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.
REFERENCES:
patent: 5309562 (1994-05-01), Li
patent: 5347632 (1994-09-01), Filepp et al.
patent: 5764235 (1998-06-01), Hunt et al.
patent: 5778187 (1998-07-01), Monteiro et al.
patent: 5835495 (1998-11-01), Ferriere
patent: 60-59841 (1985-04-01), None
patent: 6224877 (1994-08-01), None
Sakakura Takashi
Uemura Jose
Jung Min
Mitsubishi Denki & Kabushiki Kaisha
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