OPTIMIZED HIBERNATE MODE FOR WIRELESS DEVICE

• US 20120324251A1
• Filed: 05/26/2011
• Published: 12/20/2012
• Est. Priority Date: 05/26/2011
• Status: Abandoned Application

• Current Assignee: Sony Ericsson Mobile Communications USA Incorporated (Sony Group Corp.)
• Original Assignee: Sony Mobile Communications AB (Sony Group Corp.)
• Inventors: Bolanowski, Wladyslaw, Wieser, Hans
• Application Number:
  US13/504,137
• Publication Number:
  US 20120324251A1
• Time in Patent Office: Days
• US Class Current: 713/300
• CPC Class Codes: G06F 1/3203 Power management, i.e. event-based initiation of a power-saving mode
• CPC Class Codes: G06F 1/3287 by switching off individual functional units in the computer system
• CPC Class Codes: G06F 12/023 Free address space management
• CPC Class Codes: G06F 12/06 Addressing a physical block of locations, e.g. base addressing, module addressing, memory dedication G06F12/08 takes precedence
• CPC Class Codes: G06F 9/4418 Suspend and resume; Hibernate and awake
• CPC Class Codes: Y02D 10/00 Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

A system and method for reducing in boot time in an electronic device. In one embodiment, a command to power off the electronic device is received. An amount of information stored in at least one of the plurality of memory banks of RAM containing data is calculated. A determination is made as to whether the RAM has sufficient storage space to store compacted data and also form a RAM disk in a portion of the RAM, wherein the step of determining is based at least in part on the amount of information calculated. A RAM disk is initiated in an available memory bank of RAM. The RAM is compacted and a hibernate command is executed wherein the RAM disk is a target for storing the compacted RAM. Power is maintained to memory banks that form the RAM disk and the processor of the portable communication device is set to a power collapse mode.

Claims

1. A method to store data to reduce boot time in a portable communication device, the method comprising:

receiving a command to power off the portable communication device, wherein the portable communication device includes a random access memory (RAM) comprising a plurality of memory banks (MB1-MB4);

calculating an amount of information stored in at least one of the plurality of memory banks containing data;

determining whether the RAM has sufficient storage space to have at least one un-used memory bank after the data is compacted in the RAM, wherein the step of determining is based at least in part on the amount of information calculated;

compacting the RAM, wherein the at least one of the memory banks containing data is stored in one or more memory banks in consecutive locations without unused RAM between the stored data to form a compacted RAM;

maintaining power to the memory banks that form the compacted RAM;

set the at least one un-used memory bank to a power off mode; and

set an application processor coupled to the RAM to a power collapse mode.

2. The method of claim 1, wherein after receiving the command to power off the portable communication device, the portable communication device is placed in an active airplane mode.

3. The method of claim 1, wherein prior to calculating the amount of information stored, applications initiated by the user are terminated.

4. The method of claim 1, additionally including terminating sub-systems associated with the portable communication device prior to calculating an amount of information stored.

5. The method of claim 1, wherein the sub-systems to be terminated include at least one selected from the group consisting of:

switching off a display, un-mount an external memory card, and set any peripheral device coupled to the portable communication device to a standby mode or off mode.

6. The method of claim 1, wherein the compacted RAM is indexed using an original address table stored in the RAM.

7. The method of claim 1, wherein the compacted RAM is indexed using a MMU that includes re-addressed addresses that corresponds to addresses of the data in the compacted RAM.

8. The method of claim 1, wherein the compacted RAM are maintained in a self refresh mode.

9. A method to reduce boot time in a portable communication device, the method comprising:

receiving a command to power off the portable communication device, wherein the portable communication device includes a random access memory (RAM) comprising a plurality of memory banks (MB1-MB4);

calculating an amount of information stored in at least one of the plurality of memory banks containing data;

determining whether the RAM has sufficient storage space to store compacted data and also form a RAM disk in a portion of the RAM, wherein the step of determining is based at least in part on the amount of information calculated;

initiate the RAM disk in an available memory bank of RAM;

compacting the data stored in the RAM, wherein the data is stored in the RAM in consecutive locations without unused RAM between the stored data to form a compacted RAM;

execute a hibernate command, wherein the RAM disk is a target for storing the compacted RAM;

maintaining power to memory banks that form the RAM Disk; and

set application processor of the portable communication device to a power collapse mode.

10. The method of claim 9, wherein after receiving the command to power off the portable communication device, the portable communication device is placed in an active airplane mode.

11. The method of claim 9, wherein prior to calculating an amount of information stored, applications initiated by the user are terminated.

12. The method of claim 9, additionally including terminating sub-systems associated with the portable communication device prior to calculating an amount of information stored.

13. The method of claim 12, wherein the sub-systems to be terminated includes at least one selected from the group consisting of:

switching off a display, un-mount an external memory card, and set any peripheral device coupled to the portable communication device to a standby mode or off mode.

14. The method of claim 9, wherein the compacted RAM is indexed using a MMU that includes re-addressed addresses that corresponds to addresses of the data in the compacted RAM.

15. The method of claim 14, wherein a memory bank containing the RAM disk is maintained in a self refresh mode.

16. A method to reduce boot time in a portable communication device, the method comprising:

receiving a command to power off the portable communication device, wherein the portable communication device includes a random access memory (RAM) comprising a plurality of memory banks (MB1-MB4);

compacting the RAM, wherein the at least one of the memory banks containing data is stored in consecutive locations without unused RAM between the stored data to form a compacted RAM;

transfer the compacted RAM to a phase change memory;

set all memory banks of the portable communication device to a power off mode; and

set an application processor coupled to the memory banks of the portable communication device to a power collapse mode.

17. The method of claim 16, wherein after receiving the command to power off the portable communication device, any modem powered by the portable communication device is set to a power off mode.

18. The method of claim 16, additionally including terminating sub-systems associated with the portable communication device prior to calculating an amount of information stored.

19. The method of claim 16, wherein the sub-systems to be terminated includes at least one selected from the group consisting of:

switching off a display, un-mount an external memory card, and set any peripheral device coupled to the portable communication device to a standby mode or off mode.