Cache feature in electronic devices

• US 20070204102A1
• Filed: 02/28/2006
• Published: 08/30/2007
• Est. Priority Date: 02/28/2006
• Status: Abandoned Application

• Current Assignee: Nokia Corporation
• Original Assignee: Nokia Corporation
• Inventors: Ermolov, Vladimir, Luby, Thomas
• Application Number:
  US11/365,792
• Publication Number:
  US 20070204102A1
• Time in Patent Office: Days
• US Class Current: 711/113
• CPC Class Codes: G06F 1/3221 of disk drive devices
• CPC Class Codes: G06F 1/3268 Power saving in hard disk drive
• CPC Class Codes: G06F 12/0862 with prefetch
• CPC Class Codes: G06F 12/0866 for peripheral storage systems, e.g. disk cache
• CPC Class Codes: G06F 13/387 for adaptation of different data processing systems to different peripheral devices, e.g. protocol converters for incompatible systems, open system
• CPC Class Codes: G06F 2212/222 Non-volatile memory
• CPC Class Codes: G06F 3/061 Improving I/O performance
• CPC Class Codes: G06F 3/0655 Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices
• CPC Class Codes: G06F 3/068 Hybrid storage device
• CPC Class Codes: Y02D 10/00 Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

The specification and drawings present a new method, system, apparatus and software product for increasing operation time in electronic devices (e.g., mobile electronic devices) by using a cache for a hard disk. By adding a read/write memory, e.g. a flash memory, to buffer the accesses from the hard disk, it is possible to cache extra data in an anticipation that the next requested data to be read (e.g., requested by an application processor) will be present in the additional read/write memory. This eliminates the need to keep the hard disk spinning for long periods of time and thus significantly reduces the hard disk spinning time and power consumption.

Claims

1. A method, comprising:

determining by a cache control module of a mobile electronic device, using a predetermined criterion, at least one file to be loaded to a read/write memory in anticipation that said at least one file is to be requested by a request signal sent to said cache control module; and

loading said at least one file to said read/write memory.

2. The method of claim 1, wherein said at least one file is loaded from at least one further memory area.

3. The method of claim 2, wherein before said loading step, the method comprises:

providing to the read/write memory a loading instruction of said at least one file.

4. The method of claim 2, wherein said at least one further memory is a hard disk, an optical disk or a micro-electro-mechanical system storage.

5. The method of claim 1, wherein said at least one further memory is an internal part of the mobile communication device.

6. The method of claim 1, wherein said at least one further memory is an external part of the mobile communication device.

7. The method of claim 1, wherein said at least one file is created by said mobile electronic device and loaded to said read/write memory first.

8. The method of claim 1, wherein said method further comprises:

determining a time when said at least one file to be written from said read/write memory to at least one further memory area according to a pre-selected algorithm; and

writing said at least one file to the at least one further memory area for storing.

9. The method of claim 1, wherein the request signal is provided by an application processor of said mobile electronic device.

10. The method of claim 1, wherein said read/write memory is a flash memory.

11. The method of claim 10, wherein said flash memory is multimedia cards or a secure digital flash memory.

12. The method of claim 1, wherein said at least one file is determined by a cache determining block of the cache control module.

13. The method of claim 1, wherein said read/write memory and said cache control module are imbedded in one integrated circuit.

14. The method of claim 1, wherein said read/write memory is operated using wear leveling.

15. The method of claim 1, wherein said read/write memory is a random access memory.

16. The method of claim 1, wherein said read/write memory is an external card.

17. The method of claim 11, wherein said mobile electronic device is a communication device, a portable computer, a wireless communication device, a portable electronic device, a mobile electronic device or a mobile phone.

18. A computer program product comprising:

a computer readable storage structure embodying computer program code thereon for execution by a computer processor with said computer program code, wherein said computer program code comprises instructions for performing the method of claim 1, indicated as being performed by any component or a combination of components of the mobile electronic device.

31. The mobile electronic device of claim 14, wherein said read/write memory is an external card.

32. The mobile electronic device of claim 31, wherein said external card comprises:

a buffer read/write memory, configured to store said at least one file, and

a user data storage area, configured to store user data,

wherein said buffer and said user data storage area are configured for being dynamically changed in size using a pre-selected procedure.

19. A mobile electronic device, comprising:

a read/write memory, responsive to a cache control signal, configured to load at least one file to the read/write memory; and

a cache control module, configured to determine, using a predetermined criterion, at least one file to be loaded to the read/write memory in anticipation that said at least one file is to be requested by a request signal sent to said cache control module, and to provide the cache control signal comprising a loading instruction of said at least one file.

20. The mobile electronic device of claim 19, further comprising:

an application processor, for providing said request signal.

21. The mobile electronic device of claim 19, further comprising:

at least one further memory area, wherein said at least one file is loaded from at least one further memory area.

22. The mobile electronic device of claim 21, wherein said at least one further memory is a hard disk, an optical disk or a micro-electro-mechanical system storage.

23. The mobile electronic device of claim 19, wherein said mobile communication electronic device is configured to create said at least one file and to load said at least one file to said read/write memory first.

24. The mobile electronic device of claim 23, wherein said cache control module is configured to determine a time when said at least one file to be written from said read/write memory to at least one further memory area according to a pre-selected algorithm.

25. The mobile electronic device of claim 19, wherein said read/write memory is a flash memory.

26. The mobile electronic device of claim 25, wherein said flash memory is multimedia cards or a secure digital flash memory.

27. The mobile electronic device of claim 19, wherein said cache control module comprises:

a cache determining block, configured to determine said at least one file.

28. The mobile electronic device of claim 19, wherein said read/write memory and said cache control module are imbedded in one integrated circuit.

29. The mobile electronic device of claim 19, wherein said read/write memory is configured to operate using wear leveling.

30. The mobile electronic device of claim 19, wherein said read/write memory is a random access memory.

33. (canceled)

34. An integrated circuit, comprising:

a read/write memory, responsive to a cache control signal, configured to load at least one file to the read/write memory; and

a cache control module, configured to determine, using a predetermined criterion, at least one file to be loaded to the read/write memory in anticipation that said at least one file is to be requested by a request signal sent to said cache control module, and to provide the cache control signal comprising a loading instruction of said at least one file.

35. The integrated circuit of claim 34, wherein said read/write memory is a flash memory.

36. A mobile electronic device, comprising:

means for controlling, responsive to a cache control signal, for loading at least one file to the read/write memory; and

means for determining, using a predetermined criterion, at least one file to be loaded to the read/write memory in anticipation that said at least one file is to be requested by a request signal sent to said cache control module, and for providing the cache control signal comprising a loading instruction of said at least one file.

37. The mobile electronic device of claim 36, wherein means for controlling is a read/write memory and means for determining is a cache control module.