Object filtering method and client device using the same

• US 7,756,927 B2
• Filed: 10/12/2001
• Issued: 07/13/2010
• Est. Priority Date: 10/18/2000
• Status: Active Grant

• Current Assignee: Lenovo Innovations Ltd Hong Kong (Lenovo Group Ltd.)
• Original Assignee: NEC Corporation
• Inventors: Asai, Takayuki
• Primary Examiner(s): England; David E
• Application Number:
  US09/975,505
• Publication Number:
  US 20020046295A1
• Time in Patent Office: 3,196 Days
• Field of Search: 709208-232, 345/736
• US Class Current: 709/205
• CPC Class Codes: G06F 16/9577 Optimising the visualization of content, e.g. distillation of HTML documents
• CPC Class Codes: H04L 67/04 specially adapted for terminals or networks with limited capabilities; specially adapted for terminal portability
• CPC Class Codes: H04L 67/51 Discovery or management thereof, e.g. service location protocol [SLP] or web services
• CPC Class Codes: H04L 67/564 Enhancement of application control based on intercepted application data
• CPC Class Codes: H04L 67/5682 Policies or rules for updating, deleting or replacing the stored data
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

If a control portion in a WAP terminal judges in step S1 that a session is established, the residual capacity of a memory portion is monitored at a predetermined time interval or any time interval in steps S2, S3. When the residual capacity of the memory portion is lower than a predetermined capacity, the control portion renews CPI information in step S5 and continues the operations of the steps S1 to S5 if the CPI information has not yet been renewed in step S4. If the CPI information has been renewed, the control portion continues the operations of the steps S1 to S4 without renewing the CPI information.

Claims

1. An object filtering method for filtering an object, the object requested by a client from a server, the client accessing the server through a proxy server during a session, the method comprising:

periodically monitoring a residual amount of memory capacity in the client during said session to provide a plurality of monitoring results, said residual amount of memory capacity being an amount of unused memory capacity in the client that is free to accept data received by the client;

notifying a filtering condition from the client to said proxy server in accordance with at least one of the plurality of monitoring results; and

filtering the object by said proxy server in accordance with the filtering condition thus notified.

2. The object filtering method as claimed in claim 1, wherein the filtering condition is notified from the client to said proxy server after an elapse of a predetermined time period since a previous notification.

3. The object filtering method as claimed in claim 2, wherein the predetermined time period is freely set from an external source.

4. The object filtering method as claimed in claim 1, wherein the filtering condition is valid only for a predetermined time period after the proxy server is notified of the filtering condition.

5. The object filtering method as claimed in claim 1, wherein the filtering condition is represented by a filename extension of the object.

6. The object filtering method as claimed in claim 5, wherein said proxy server prohibits only a file having the filename extension notified from the client as the filtering condition from being transmitted to the client.

7. The object filtering method as claimed in claim 5, wherein said proxy server allows only a file having no filename extension notified from the client as the filtering condition to be transmitted to the client.

8. The object filtering method as claimed in claim 1, wherein the filtering condition is represented by a data length of the object.

9. The object filtering method as claimed in claim 8, wherein said proxy server prohibits a file having a data length exceeding the data length notified from the client as the filtering condition from being transmitted to the client.

10. The object filtering method as claimed in claim 1, wherein the client is a cellular phone terminal.

11. The object filtering method as claimed in claim 1, wherein said proxy server is a gateway server for WAP (Wireless Application Protocol).

12. A client device for accessing a server through a proxy server during a session to request a desired object from the server, the client device comprising:

control means for controlling an access to said proxy server to acquire the object; and

memory means for storing the object,

wherein said control means is configured to periodically monitor a residual amount of memory capacity of said memory means during said session, said residual amount of memory capacity being an amount of unused memory capacity of the memory means that is free to accept data received by the client device; and

wherein, when said control means detects that said residual amount of memory capacity of said memory means is equal to a predetermined residual amount or less, said control means notifies to said proxy server a filtering condition of the object transmitted to the client device.

13. The client device as claimed in claim 12, wherein said control means periodically notifies filtering conditions to said proxy server at predetermined time periods.

14. The client device as claimed in claim 13, wherein the predetermined time periods are freely set from an external source.

15. The client device as claimed in claim 12, wherein the filtering condition is represented by a filename extension of the object.

16. The client device as claimed in claim 12, wherein the filtering condition is represented by a data length of the object.

17. The client device as claimed in claim 12, wherein said client device is a cellular phone terminal.

18. The client device as claimed in claim 12, wherein said client device is a WAP (Wireless Application Protocol) terminal.

19. A client device for accessing a server through a proxy server during a session to request a desired object from the server, the client device comprising:

a controller for controlling an access to said proxy server to acquire the object; and

a memory unit for storing the object;

wherein said controller is configured to periodically monitor a residual amount of memory capacity of said memory unit during said session, said residual amount of memory capacity being an amount of unused memory capacity of the memory unit that is free to accept data received by the client device; and

wherein, when said controller detects that said residual amount of memory capacity of said memory unit is equal to a predetermined residual amount or less, said controller notifies to said proxy server a filtering condition for filtering the object.

20. The client device of claim 19,

wherein the filtering condition is represented by a data length of the object.

21. The client device of claim 19,

wherein the controller is configured to establish the session between the client device and the proxy server using WSP (Wireless Session Protocol).

22. The client device of claim 19,

wherein the controller is configured to establish the session between the client device and the proxy server;

and

wherein the session is maintained until the session is terminated by the client device or the proxy server.

23. The client device of claim 19,

wherein the residual amount of memory capacity of the memory unit is able to change as data is stored in said memory unit.

24. The client device of claim 19,

wherein the residual amount of memory capacity of the memory unit is less than a total amount of memory capacity of the memory unit.