Electrical computers and digital processing systems: multicomput – Computer-to-computer protocol implementing – Computer-to-computer data framing
Reexamination Certificate
1998-07-28
2001-02-20
Maung, Zarni (Department: 2758)
Electrical computers and digital processing systems: multicomput
Computer-to-computer protocol implementing
Computer-to-computer data framing
C709S246000, C709S247000, C370S472000
Reexamination Certificate
active
06192412
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates generally to the field of computer communication systems and more particularly to computer file transfer systems.
The transfer of large computer files between different computers continues to grow worldwide at a rapid pace. Databases, video files, and other large computer files are used extensively on present computer networks. Disadvantageously, transferring these large files between different computer networks through existing computer file transfer systems require a large amount of time. The present inventors have determined that a very significant portion of the excessive time for successful transmission of these large files is due to the retransmission of the large files because initially or on subsequent attempts they are not received correctly at the intended recipient computer.
SUMMARY OF THE INVENTION
In accordance with the present invention, the problem of excessive file transfer times of known file transmitting systems, particularly with respect to very large files, is overcome by splitting the file into a plurality of component sections each of which is sent independently.
Preferably, a system of the invention includes a file splitter, for separating the computer file into component sections and a file transmitter for independently sending the component sections to the receiving computer. The file splitter includes a recursive splitter for splitting the computer file into smaller component sections from the larger component sections. The file splitter includes an initial file size selector for preselecting the maximum size for a component section and a threshold selector for stopping the recursive splitter when the size of the smallest component section is equal to or less than a minimum size for a component section.
The threshold selector preferably includes a variable selector for changing the maximum size of the component sections in accordance with a preselected environmental variable and means for determining the environmental variable.
A transmission controller at the transmitting computer independently controls transmission of each of the component sections of the file to the receiving computer includes a router for independently controlling the routing of the transmission of each of the component sections of the computer file. Additionally, the transmission controller includes a file compressor for independently controlling the compression of each of the component sections prior to transmission to the receiving computer.
Preferably, the transmission controller also includes a retransmitter for independently controlling the retransmission of each of the component sections in the event of transmission failure and means for concurrently transmitting each component section asynchronously relative to each other component section.
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Cantoral Eduardo
Lennert Joseph F.
Plovich Steve A.
Caldwell Andrew
Lucent Technologies - Inc.
Maung Zarni
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