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EPA-Patent auf Dateneinsparung bei mobiler TCP-Kommunikation
- To: swpat@ffii.org
- Subject: EPA-Patent auf Dateneinsparung bei mobiler TCP-Kommunikation
- From: PILCH Hartmut <phm@a2e.de>
- Date: Sat, 11 Nov 2000 13:03:22 +0100 (CET)
- cc: debate@fitug.de
- Comment: This message comes from the debate mailing list.
- Sender: owner-debate@fitug.de
EP0823173
Method and apparatus of using virtual sockets for reducing data transmitted
over a wireless communication link between a client web browser and a
host web server using a standard TCP protocol
IBM (US)
Claims
That which is claimed is:
1. A method of reducing the data transmitted over a communication link
from a first application resident in a first computer and to a second
application resident in a second computer wherein the data is
transmitted over an external communication link from the first
computer to the second computer utilizing the TCP communication
protocol, the method comprising:
establishing a first virtual socket in the first computer in response
to each connection request by the first application for receiving
request data originated by the first application;
establishing a first real socket in the first computer and a second
real socket in the second computer to connect the first computer to
the second computer over the external communication link
establishing in the second computer a second virtual socket for each
connection request by the first application wherein the second virtual
socket corresponds to a first virtual socket established in the first
computer in response to a connection request by the first application;
multiplexing request data associated with a first virtual socket onto
the first real socket;
transmitting the multiplexed request data over the external
communication link utilizing the TCP protocol to the second real
socket;
receiving the multiplexed request data from the external communication
link;
demultiplexing the request data received by the second real socket
from the external communication link;
providing the demultiplexed request data to the second virtual socket
which corresponds to the first virtual socket established in response
to the request from the first application;
providing the request data received by the second virtual socket to
the second application; and
maintaining the first and second real sockets until the request data
corresponding to a request from the first application which
established a first virtual socket has been provided to the second
application.
Mit diesem Hauptanspruch ist IBM in Europa zum Eigentuemer des Problems
der Dateneinsparung durch Buendelung mehrerer Anfragen auf einem Kanal bei
Internet-Verbindungen geworden. Dies ist besonders fuer die mobile
Kommunikation bei geringen Datenuebertragungsraten hilfreich. Jeder
diesbezuegliche Standard wird also entweder mit langsamer Uebertragung
vorlieb nehmen oder dem Willen von IBM unterworfen sein.
Oder habe ich etwas uebersehen?
2. The method of claim 1 further comprising the steps of:
receiving response data from the second application in response to a
request from the first application at the second virtual socket
associated with the request from the first application;
multiplexing the response data received by the second virtual socket
onto the second real socket;
transmitting the multiplexed response data over the external
communication link utilizing the TCP communication protocol to the
first real socket;
receiving the multiplexed response data from the external
communication link;
demultiplexing the response data received by the first real socket;
providing the demultiplexed response data to the first virtual socket
which corresponds to the request from the first application as the
response to the request from the first application; and
providing the response data received by the first virtual socket to
the first application.
3. The method of claim 2 further comprising the steps of:
closing the second virtual socket after the response data is
multiplexed; and
closing the first virtual socket after the response data is provided
to the first application.
4. The method of claim 3 wherein said maintaining step comprises
closing the first and second real sockets when all first virtual
sockets are closed.
5. The method of claim 3 wherein said maintaining step comprises
maintaining the first and second real sockets for a predetermined time
after all first virtual sockets are closed.
6. The method of claim 1 wherein the first application comprises a web
server and the second application comprises a web browser.
7. The method of claim 1 wherein the external communication link
comprises a wireless communication link.
8. An apparatus for reducing the data transmitted over a communication
link from a first application resident in a first computer and to a
second application resident in a second computer wherein the data is
transmitted over an external communication link from the first
computer to the second computer utilizing the TCP communication
protocol, the apparatus comprising:
means for establishing a first virtual socket in the first computer in
response to each connection request by the first application for
receiving request data originated by the first application;
means for establishing a first real socket in the first computer and a
second real socket in the second computer to connect the first
computer to the second computer over the external communication link
means for establishing in the second computer a second virtual socket
for each connection request by the first application wherein the
second virtual socket corresponds to a first virtual socket
established in the first computer in response to a connection request
by the first application;
means for multiplexing request data associated with a first virtual
socket onto the first real socket;
means for transmitting the multiplexed request data over the external
communication link utilizing the TCP protocol to the second real
socket;
means for receiving the multiplexed request data from the external
communication link;
means for demultiplexing the request data received by the second real
socket from the external communication link;
means for providing the demultiplexed request data to the second
virtual socket which corresponds to the first virtual socket
established in response to the request from the first application;
means for providing the request data received by the second virtual
socket to the second application; and
means for maintaining the first and second real sockets until the
request data corresponding to a request from the first application
which established a first virtual socket has been provided to the
second application.
9. The apparatus of claim 8 further comprising the steps of:
means for receiving response data from the second application in
response to a request from the first application at the second virtual
socket associated with the request from the first application;
means for multiplexing the response data received by the second
virtual socket onto the second real socket;
means for transmitting the multiplexed response data over the external
communication link utilizing the TCP communication protocol to the
first real socket;
means for receiving the multiplexed response data from the external
communication link;
means for demultiplexing the response data received by the first real
socket;
means for providing the demultiplexed response data to the first
virtual socket which corresponds to the request from the first
application as the response to the request from the first application;
and
means for providing the response data received by the first virtual
socket to the first application.
10. The apparatus of claim 9 further comprising the steps of:
means for closing the second virtual socket after the response data is
multiplexed; and
means for closing the first virtual socket after the response data is
provided to the first application.
11. The apparatus of claim 10 wherein said means for maintaining
comprises means for closing the first and second real sockets when all
first virtual sockets are closed.
12. The apparatus of claim 10 wherein said means for maintaining
comprises means for maintaining the first and second real sockets for
a predetermined time after all first virtual sockets are closed.
13. The apparatus of claim 8 wherein the first application comprises a
web server and the second application comprises a web browser.
14. The apparatus of claim 8 wherein the external communication link
comprises a wireless communication link.
15. A computer program product for reducing the data transmitted over
a communication link from a first application resident in a first
computer and to a second application resident in a second computer
wherein the data is transmitted over an external communication link
from the first computer to the second computer utilizing the TCP
communication protocol, the computer program product comprising:
a computer-readable storage medium having computer-readable program
code means embodied in said medium, said computer-readable program
code means comprising:
computer readable program code means for establishing a first virtual
socket in the first computer in response to each connection request by
the first application for receiving request data originated by the
first application;
computer readable program code means for establishing a first real
socket in the first computer and a second real socket in the second
computer to connect the first computer to the second computer over the
external communication link computer readable program code means for
establishing in the second computer a second virtual socket for each
connection request by the first application wherein the second virtual
socket corresponds to a first virtual socket established in the first
computer in response to a connection request by the first application;
computer readable program code means for multiplexing request data
associated with a first virtual socket onto the first real socket;
computer readable program code means for transmitting the multiplexed
request data over the external communication link utilizing the TCP
protocol to the second real socket;
computer readable program code means for receiving the multiplexed
request data from the external communication link;
computer readable program code means for demultiplexing the request
data received by the second real socket from the external
communication link;
computer readable program code means for providing the demultiplexed
request data to the second virtual socket which corresponds to the
first virtual socket established in response to the request from the
first application;
computer readable program code means for providing the request data
received by the second virtual socket to the second application; and
computer readable program code means for maintaining the first and
second real sockets until the request data corresponding to a request
from the first application which established a first virtual socket
has been provided to the second application.
16. The computer program product of claim 15 further comprising the
steps of:
computer readable program code means for receiving response data from
the second application in response to a request from the first
application at the second virtual socket associated with the request
from the first application;
computer readable program code means for multiplexing the response
data received by the second virtual socket onto the second real
socket;
computer readable program code means for transmitting the multiplexed
response data over the external communication link utilizing the TCP
communication protocol to the first real socket;
computer readable program code means for receiving the multiplexed
response data from the external communication link;
computer readable program code means for demultiplexing the response
data received by the first real socket;
computer readable program code means for providing the demultiplexed
response data to the first virtual socket which corresponds to the
request from the first application as the response to the request from
the first application; and
computer readable program code means for providing the response data
received by the first virtual socket to the first application.
17. The computer program product of claim 16 further comprising the
steps of:
computer readable program code means for closing the second virtual
socket after the response data is multiplexed; and
computer readable program code means for closing the first virtual
socket after the response data is provided to the first application.
18. The computer program product of claim 17 wherein said computer
readable program code means for maintaining comprises computer
readable program code means for closing the first and second real
sockets when all first virtual sockets are closed.
19. The computer program product of claim 17 wherein said computer
readable program code means for maintaining comprises computer
readable program code means for maintaining the first and second real
sockets for a predetermined time after all first virtual sockets are
closed.
20. The computer program product of claim 15 wherein the first
application comprises a web server and the second application
comprises a web browser.
21. The computer program product of claim 15 wherein the external
communication link comprises a wireless communication link.
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Data supplied from the esp@cenet database - l2