Server device and communication system

• US 20070220132A1
• Filed: 03/13/2007
• Published: 09/20/2007
• Est. Priority Date: 03/20/2006
• Status: Abandoned Application

• Current Assignee: Murata Machinery Limited (Muratec)
• Original Assignee: Murata Machinery Limited (Muratec)
• Inventors: Tanimoto, Yoshifumi
• Application Number:
  US11/717,203
• Publication Number:
  US 20070220132A1
• Time in Patent Office: Days
• US Class Current: 709/223
• CPC Class Codes: H04L 63/0281 Proxies
• CPC Class Codes: H04L 63/029 Firewall traversal, e.g. tunnelling or, creating pinholes
• CPC Class Codes: H04L 67/06 specially adapted for file transfer, e.g. file transfer protocol [FTP]

Abstract

A data management device is provided in a Local Area Network inside a firewall, and a server is provided in a Wide Area Network outside the firewall. When the data management device carries out a TCP connection request to the server and a TCP connection is established, the data management device transmits index information to the server. The established TCP connection is held. The client device acquires the index information from the server, and carries out a file access request to the server according to the index information. The server uses the held TCP connection to acquire a file from the data management device, and transmits the file to the client device.

Claims

1. A server device comprising:

means for accepting a transmission control protocol connection request from a data management device, holding a transmission control protocol connection, and receiving index information of data managed by the data management device using the held transmission control protocol connection;

means for transmitting the index information to a client device; and

means for acquiring, when receiving an access request from the client device according to the index information for accessing the data managed by the data management device, designated data from the data management device through the held transmission control protocol connection and transmitting the acquired data to the client device.

2. The server device according to claim 1, further comprising means for authenticating the access request of the client device.

3. The server device according to claim 1, further comprising:

means for holding a transmission control protocol connection with a plurality of data management devices and receiving index information from the plurality of the data management devices;

means for setting an access right of the client device for each of the data management devices; and

means for transmitting the index information of at least one of the data management devices, for which the access right is given, to the client device.

4. The server device according to claim 1, further comprising:

means for holding a transmission control protocol connection with a plurality of data management devices and receiving index information from the plurality of the data management devices;

means for setting an access right of the client device for a group of the data management devices; and

means for transmitting the index information of the data management devices, for which the access right is given, to the client device.

5. The server device according to claim 2, further comprising:

means for holding a transmission control protocol connection with a plurality of data management devices and receiving index information from the plurality of the data management devices;

means for setting an access right of the client device for each of the data management devices; and

means for transmitting the index information of at least one of the data management devices, for which the access right is given, to the client device.

6. The server device according to claim 2, further comprising:

means for holding a transmission control protocol connection with a plurality of data management devices and receiving index information from the plurality of the data management devices;

means for setting an access right of the client device for a group of the data management devices; and

means for transmitting the index information of the data management devices, for which the access right is given, to the client device.

7. A communication system comprising a data management device, a server device, and a client device,

wherein the data management device including:

means for storing and managing data; and

means for requesting a transmission control protocol connection to a server device;

the server device including;

means for accepting a transmission control protocol connection request from the data management device, holding a transmission control protocol connection, and receiving index information of data managed by the data management device using the held transmission control protocol connection; and

means for transmitting the index information to the client device,

the client device including means for transmitting an access request for the data managed by the data management device according to the index information to the server device,

wherein the server device further includes means for acquiring, when receiving an access request from the client device for accessing the data managed by the data management device, designated data from the data management device through the held transmission control protocol connection and transmitting the acquired data to the client device.

8. The communication system according to claim 7, wherein the server device includes means for authenticating an access request of the client device.

9. The communication system according to claim 7, wherein the server device further including:

means for holding a transmission control protocol connection with a plurality of data management devices and receiving index information from the plurality of the data management devices;

means for setting an access right of the client device for each of the data management devices; and

means for transmitting the index information of at least one of the data management devices, for which the access right is given, to the client device.

10. The communication system according to claim 8, wherein the server device further including:

means for holding a transmission control protocol connection with a plurality of data management devices and receiving index information from the plurality of the data management devices;

means for setting an access right of the client device for each of the data management devices; and

means for transmitting the index information of the data management devices, for which the access right is given, to the client device.

11. The communication system according to claim 7, wherein the server device further including:

means for holding a transmission control protocol connection with a plurality of data management devices and receiving index information from the plurality of the data management devices;

means for setting an access right of the client device for a group of the data management devices; and

means for transmitting the index information of the data management devices, for which the access right is given, to the client device.

12. The communication system according to claim 8, wherein the server device further including:

means for holding a transmission control protocol connection with a plurality of data management devices and receiving index information from the plurality of the data management devices;

means for setting an access right of the client device for a group of the data management devices; and

means for transmitting the index information of the data management devices, for which the access right is given, to the client device.