Communications system with automatic data delete function and computer program used for the system

• US 20030135546A1
• Filed: 04/29/2002
• Published: 07/17/2003
• Est. Priority Date: 12/19/2001
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Yoshioka, Shin-Ichi
• Granted Patent: US 7,552,167 B2
• Time in Patent Office: Days
• US Class Current: 709/203
• CPC Class Codes: H04L 67/1001 for accessing one among a plurality of replicated servers
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

A communications control method is provided for managing a communications system that includes an external network such as the Internet, an internal network and a router. A plurality of clients are connectable to the external network, while a server is connected to the internal network. The external network and the internal network are connected to each other via the router. In accordance with the communication control method, data sent from the client toward the server is stored in a suitable memory. Then, it is determined whether the stored data meets the prescribed delete condition. When this condition is met, the data is deleted from the memory.

Claims

1. A communications control method for a communications system including:

an external network connected to a client;

an internal network connected to a server; and

a router connecting the external network and the internal network to each other;

the method comprising the steps of;

storing data sent from the client toward the server;

determining whether the stored data meets a delete condition; and

deleting the stored data when the delete condition is met.

2. The method according to claim 1, further comprising the steps of:

searching pieces of data sent from the client toward the server;

determining whether said pieces of data contain identical messages; and

deleting a redundant message when identical messages are found.

3. The method according to claim 1, wherein the data deletion is performed when an amount of data on the internal network is greater than a prescribed threshold.

4. The method according to claim 1, wherein the data deletion is performed when the stored data contains no sender address.

5. The method according to claim 1, further comprising the steps of:

sending response data from the server toward the client; and

detecting a data transfer rate on the external network;

wherein the response data is thinned out when the data transfer rate is reduced.

6. A communications system comprising:

an external network connected to a client;

an internal network connected to a server;

a router connecting the external network and the internal network to each other; and

a processor connected to the router for storing data sent from the client toward the server;

wherein the processor deletes the stored data when the stored data meets a delete condition.

7. The system according to claim 6, wherein the processor stores pieces of data sent from the client toward the server, and deletes a redundant message among said pieces of data.

8. The system according to claim 6, further comprising a router controller that determines whether an amount of data on the internal network is greater than a prescribed threshold, wherein the data deletion by the processor is performed when said amount of data is greater than the threshold.

9. The system according to claim 6, wherein the processor deletes anonymous data containing no sender address.

10. The system according to claim 6, further comprising a router controller for detecting a data transfer rate on the external network, wherein response data sent from the server toward the client is thinned out when the data transfer rate is reduced.

11. A computer program for a communications system including:

an external network connected to a client;

an internal network connected to a server;

a router connecting the external network and the internal network to each other; and

a processor connected to the router;

the program executing the steps of;

causing the processor to store data sent from the client toward the server; and

causing the processor to delete the stored data when the stored data meets a delete condition.

12. The program according to claim 11, further executing the step of determining whether the stored data contains a redundant message, wherein the redundant message is deleted by the processor.

13. The program according to claim 11, further executing the step of determining whether an amount of data on the internal network is greater than a prescribed threshold, wherein the data meeting the delete condition is deleted by the processor when said amount of data is greater than the threshold.

14. The program according to claim 11, wherein anonymous data containing no sender address is deleted by the processor.

15. The program according to claim 11, further executing the steps of:

detecting a data transfer rate on the external network; and

thinning out, when the data transfer rate is reduced, response data sent form the server toward the client.