WO2011131003A1

WO2011131003A1 - System for realizing mobile phone buffer storage mechanism and method for loading mobile phone operating system

Info

Publication number: WO2011131003A1
Application number: PCT/CN2010/078863
Authority: WO
Inventors: 李健诚; 张齐治; 何庆尧
Original assignee: 广州盛华信息技术有限公司
Priority date: 2010-04-23
Filing date: 2010-11-18
Publication date: 2011-10-27
Also published as: CN102236530A

Abstract

A system for realizing mobile phone buffer storage mechanism and a method for loading mobile phone operating system are disclosed in the present solution. The system includes a mobile phone, a SIM card exchanging data with the mobile phone through a communication interface, and a non-volatile memory performed as a virtual cache of the SIM card, wherein the SIM card stores data of a mobile phone operating system and applications, the mobile phone controls to pre-read the data of the mobile phone operating system and applications stored in the SIM card which is frequently visited by the system into the non-volatile memory performed as a virtual cache of the SIM card, and reads the corresponding data from the non-volatile memory directly when the mobile phone visits the corresponding data. The present solution can accelerate the speed of the mobile phone loading and running the mobile phone operating system and applications stored in the SIM card, improve the user experience of a large storage SIM card storing a mobile phone operating system, and not need to change the present hardware architecture of a mobile phone.

Description

System for realizing mobile phone buffer memory mechanism and mobile phone operating system loading method

TECHNICAL FIELD The present invention relates to the field of mobile phone technologies, and more particularly to a system for implementing a mobile phone buffer memory mechanism and a method for loading a mobile phone operating system.

BACKGROUND OF THE INVENTION At present, mobile phones gradually expand from a single voice call and short message service function to a personal information processing mobile terminal having various multimedia entertainment functions. On the one hand, two or more mobile phones are becoming more and more popular; on the other hand, mobile phones have become fashionable electronic consumer products, accelerating the frequency of mobile phone replacement. Different mobile phones have different operating systems to bring users a very poor experience: not only frequently adapt to the operating system environment of different mobile platforms, but also repeatedly establish their own personalized environment on different mobile platforms (such as installation Your favorite software, etc.). At present, the mobile phone operating system can be stored on the large-capacity user identification card SIM, and on this basis, the personal operation environment is established, which solves the trouble brought by the user to replace the mobile phone to some extent. However, due to the limitation of the universal serial bus USB transmission rate, the mobile phone reads the mobile phone operating system on the SIM card to the working memory RAM of the mobile phone through the universal serial bus USB interface on the user identification card SIM. Slow, it takes a long time to load the operating system every time the phone is turned on, which brings a lot of inconvenience to the user. SUMMARY OF THE INVENTION The technical problem to be solved by the present invention is to improve a system for implementing a mobile phone buffer memory mechanism and a mobile phone operating system loading method, so as to reduce the operating system cost of loading a mobile phone stored on a SIM card due to limitation of a USB transmission rate. The effect of too long, improving the user experience. In order to solve the above problems, the present invention uses the following technical solutions:

A system for implementing a mobile phone buffer memory mechanism, comprising:

A mobile phone, a SIM card for interacting with a mobile phone through a communication interface, and a non-volatile memory virtualized as a cache of a SIM card, wherein the SIM card stores a mobile phone operating system and application data, and the mobile phone controls the need for storing the SIM card. The mobile phone operating system and application data frequently accessed by the system are pre-read into the non-volatile memory of the virtual memory of the SIM card, and the corresponding data is directly read from the non-volatile memory when the mobile phone accesses the corresponding data. The data.

Among them, the mobile phone can include:

a driver module, configured to provide a cache on the mobile phone to virtualize the non-volatile memory as a SIM card;

Cache manager module for managing non-volatile memory as a cache, allocating pages, releasing, reclaiming invalid or low-utilization pages, and non-volatile as cache Establishing a data block between the memory and the SIM card - a corresponding mapping relationship;

a central processing unit for controlling the above modules and controlling the need to store the SIM card The mobile operating system and application data frequently accessed by the system are pre-read into a non-volatile memory that is virtualized as a cache of the SIM card.

Wherein, if the data block in the non-volatile memory as the cache is updated, the central processor further controls to write back the updated data block to the SIM card.

In addition, a method for loading a mobile phone operating system based on a mobile phone buffer memory mechanism includes:

The virtual non-volatile memory is a cache of the SIM card;

Pre-reading the operating system data of the mobile phone that needs to be accessed by the system loading into the non-volatile memory of the virtual memory of the SIM card;

If the non-volatile memory virtualized as the cache memory stores the mobile phone operating system data for loading the required access, the mobile phone directly reads and loads the mobile phone operation from the non-volatile memory that is virtualized as the cache memory. The data required by the system, otherwise, the mobile phone reads the required data from the SIM card into a non-volatile memory that is virtualized as a cache memory, and then reads from the non-volatile memory that is virtualized as a cache memory. Take the data you need to load your phone's operating system.

Among them, before loading the mobile phone operating system, it also includes:

Check if the mobile operating system data loaded with the required access is stored in the non-volatile memory.

Wherein, the integrated circuit card identification code of the SIM card is used as an association between the SIM card and the non-volatile memory for storing data consistency, and the checking whether the non-volatile memory stores the mobile phone operating system data for loading the required access includes :

Check if the non-volatile memory and the SIM card's integrated circuit card ID are the same, If the same, it is determined that the non-volatile memory stores the mobile operating system data for loading the required access, otherwise, it is determined that the non-volatile memory does not store the mobile operating system data for loading the required access.

In addition, the method further includes: when the data block in the non-volatile memory as the cache is updated, the central processor further controls to write back the updated data block to the SIM card.

The control writes the updated data block back to the SIM card according to the condition of the operating system, the utilization rate of the communication link of the SIM card, the length of the write-back queue, and the power of the mobile phone to determine the priority to perform the write-back. Compared with the prior art, the present invention has the following beneficial effects:

In the present invention, a non-volatile memory is virtualized as a cache of a SIM card; data of a mobile phone operating system and an application that needs to be accessed by the system to be read is pre-read to a cache that is virtualized as a SIM card. In the non-volatile memory; if the non-volatile memory stores the mobile phone operating system data for loading the required access, the mobile phone reads the data required to load the mobile phone operating system from the non-volatile memory; The mobile phone reads the required data from the SIM card into the non-volatile memory which is virtualized as the cache of the SIM card, and then reads the data required for loading the mobile phone operating system from the non-volatile memory, smoothing The difference in access between the mobile phone and the non-volatile memory and the SIM card speeds up the speed of loading and running the mobile phone operating system and applications stored on the SIM card, and improves the large-capacity SIM card storing the mobile phone operating system. User experience;

In addition, the present invention can be used in the hardware abstraction layer of the mobile phone through the underlying driver module. The machine's non-volatile memory is abstracted into a cache of large-capacity SIM cards without changing the phone's existing hardware architecture.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic structural diagram of a system of a mobile phone according to the present invention;

2 is a schematic diagram of a specific embodiment of implementing data mapping between a non-volatile memory and a SIM card according to the present invention; FIG. 3 is a page of a specific embodiment of a non-volatile memory as a cache memory in the present invention. And a data block structure diagram; FIG. 4 is a flow chart of a specific embodiment of a method for loading a mobile phone operating system based on a mobile phone buffer memory mechanism according to the present invention;

FIG. 5 is a flow chart of a specific embodiment of loading a mobile phone operating system according to the present invention; FIG. 6 is a schematic diagram of a specific embodiment of implementing a write back service in the present invention.

DETAILED DESCRIPTION OF THE INVENTION The core of the present invention is that the analysis of the operation of the mobile phone operating system and a large number of applications shows that the address of the data that the system needs to access is usually concentrated in the memory logical address space in a short time interval. Within the scope, the system has frequent access to localized memory addresses, while addresses outside this range are rarely accessed. Therefore, according to the system's tendency to access the memory, it has a tendency to be concentrated in time. The direct access to non-volatile memory (such as Nand flash) is faster than accessing the SIM card through the universal serial interface USB, and the non-volatile memory is used as a high speed between the mobile phone working memory and the high-capacity SIM card. The buffer memory (referred to as cache) caches the data on the SIM card that needs to be accessed frequently, which can effectively improve the loading and running speed of the mobile phone operating system and the application application.

At the same time, the non-volatile memory has the characteristics of retaining data after power-off. As a cache of a large-capacity SIM card storing the mobile phone operating system, the non-volatile memory can not only provide system performance, but also speed up the subsequent startup of the mobile phone. Load the speed of the phone operating system on the SIM card.

To this end, the system for implementing the mobile phone buffer memory mechanism of the present invention mainly comprises: a mobile phone, a SIM card connected to the mobile phone, and a non-volatile memory virtualized as a cache memory of the SIM card, wherein the SIM card stores the mobile phone operating system. And application data, the mobile phone control pre-reads the mobile phone operating system and/or application data stored by the SIM card that needs to be frequently accessed by the system into a non-volatile memory that is virtualized as a SIM card cache, and is in the mobile phone. When the corresponding data is accessed, the corresponding data is directly read from the non-volatile memory.

For specific implementation, refer to FIG. 1 , which is a system structural diagram of a mobile phone according to the present invention; wherein the hardware abstraction layer provides hardware abstraction services to the mobile phone operating system and applications through the hardware abstraction layer interface, and is used in various hardware platforms. The development of the operating system kernel provides a unified hardware platform related functionality.

In order to implement the above cache (cache), the present invention needs to include on the mobile phone: a driver module and a cache manager module, and as a control Central processor, where

Driver module for providing a driver on the mobile phone to virtualize the non-volatile memory

The SIM card cache memory, when implemented, provides a unified file access interface for the upper file system;

The central processing unit is configured to control the foregoing module, and pre-read the mobile phone operating system and application data stored by the SIM card that needs to be frequently accessed by the system into a non-volatile memory that is virtualized as a cache of the SIM card. And when the data block in the non-volatile memory as the cache is updated, the central processor also controls to write back the updated data block to the SIM card. The cache manager module is specifically described below. In the specific implementation, the non-volatile memory as the cache memory in the present invention may include two levels of data structures, one is a page, one is a data block; the page is a Cache A memory unit when the manager module manages the Cache, where each page contains several data blocks. In a specific embodiment, the size of the page may be 4 kb, 16 kb, 64 kb, which is related to the specific mobile operating system and memory management implementation. For example, a specific embodiment refers to FIG. 2, assuming that the page size is 4 kb and the data block size is lkb. The files (data) required by the system in the SIM card storage may be discontinuous data blocks, the Cache Manager module will The discontinuous data blocks on the SIM card are mapped to the cache page of the non-volatile memory, and the system uses the advantage of the mobile phone to access the non-volatile memory throughput rate, and reads the required data from the cache of the non-volatile memory. Improve the efficiency of the system to read data, thereby improving the performance of the entire system.

In addition, in the specific implementation, the larger the capacity of the non-volatile memory, the larger the Cache that can be used as the SIM card, the more data can be mapped, and the system performance is further improved.

Need to explain, in the specific implementation, there are two indicators to measure the quality of the above cache manager module design. The first is the hit rate of the Cache. When the Cache hits, the data can be directly obtained from the non-volatile memory. It is no longer necessary to access the large-capacity SIM card through the communication interface (such as the USB interface), so the data reading can be significantly accelerated, thereby improving. The performance of the system; the second is the utilization of the Cache. The effective Cache refers to the Cache item that will be accessed. If the ratio of the effective Cache is low, it will not only reduce the hit rate of the Cache, but also waste the capacity of the non-volatile memory. Affect the performance of the system. In the present invention, the cache manager module improves the hit rate of the cache by using a pre-reading mechanism, and at the same time, the data block updated by the cache (referred to as dirty block in the present invention) can be written back to the SIM card through a write-back mechanism. .

In the specific implementation, the pre-reading mechanism refers to the mobile phone operating the mobile phone operating system or application program of the SIM card, and the central processor controls the files required to run the mobile phone operating system or the application according to the record or the preset policy. The data is read into the non-volatile memory cache, and the required data is directly read from the non-volatile memory during the operation of the operating system or the application, and the SIM is not required to be accessed through the USB interface of the SIM card. The data on the card is gone. Since the non-volatile memory has the characteristics of retaining data after power-off, the subsequent operation of the mobile phone to load the mobile operating system and run the application can continue to read the required data from the non-volatile memory.

In addition, the above write-back mechanism means that in order to maintain the consistency of the data in the non-volatile memory cache and the data in the SIM card, it is ensured that the updated data in the non-volatile memory cache is not lost due to the overlay, and must be The data updated by the non-volatile memory cache is written back to the SIM card in time and accurately. For example, the non-volatile memory capacity is full, or the data required by the system does not exist in the cache, or a page fault occurs. When the central processor controls the cache manager module to recycle the cache page with the lowest utilization rate in the non-volatile memory, the "dirty" data block of the cache page is written back to the SIM card before the release is released.

Referring to FIG. 3, in one embodiment of the present invention, a cache manager module allocates a suitable page in a non-volatile memory for buffering data of a SIM card, each page including a plurality of data blocks, each The data block corresponds to a data block descriptor. The cache manager module manages the data block of the cache by the information held by the data block descriptor, and the data block descriptor contains a series of information related to the data block, such as the status of the data block, and the data block corresponding to the SIM card data block. Map addresses, utilization of data blocks, and more.

The Cache data block has two states: "clean" and "dirty". The data block of the Cache is "clean block", indicating that the data block of the Cache is consistent with the corresponding data block on the SIM card; and when the data block of the Cache is "dirty block", the data block of the Cache has been updated, and needs to be returned. Write to the corresponding SIM card, controlled by the central processor, high speed The flush memory manager module writes back the "dirty block" of the non-volatile memory to the corresponding SIM card data block according to the dynamic write-back mechanism. The utilization ratio of the data block descriptor for the above-mentioned data block descriptor in the present embodiment describes the frequency at which the Cache data block is accessed by the system. When the capacity of the non-volatile memory is tight, the cache manager module is responsible for recovering and releasing cache data blocks that are underutilized or expired by the central processor control, so as to improve the utilization of the entire cache.

In order not to affect the operation of the mobile operating system and take into account the utilization of the non-volatile memory and the real-time nature of the write-back operation, the cache management can be dynamically adjusted according to the busyness of the system and the length of the Cache data block write-back queue. The priority of the writeback service of the module, according to the priority level, dynamically schedules the writeback service and performs the writeback operation. The system's busy, idle, and Cache write-back queues are long and short, combining different priority levels. When the system is busy or the Cache writeback queue is not long, the system lowers the priority of the writeback service, so that the system resources are not occupied. When the system is in the idle state or the Cache writeback queue reaches a certain length, the system improves the writeback. The priority of the service enables the "dirty block" in the Cache to be written back to the SIM card in time; when the Cache's write-back queue is full, the system raises the write-back service to the highest level whether the system is idle or not. To prevent the system from "deadlock".

In a specific implementation, when the busyness of the operating system and the length of the write-back queue are more fine-grained, the priority of the write-back service is combined into more levels, and accordingly, the operating system can write back to the service. For more detailed scheduling, the efficiency of the write-back service and the performance of the system are improved.

Need to explain, in the process of writing back, you need to lock the Cache and SIM card, The write operation is mutually exclusive atomic; after the writeback is completed, the Cache and SIM card are unlocked in time to prevent a "deadlock" condition. In addition, when the write-back operation is performed, the accidental power-off of the mobile phone may cause data loss or even damage the original operating system stored on the SIM card. Therefore, before the Cache Manager module performs the write-back process, it can calculate whether the current mobile phone battery has enough power to complete the write-back operation, and ensure that the non-volatile memory update can be smoothly written back to the SIM card as a specific For an embodiment, reference may be made to FIG. 6, which is a schematic diagram of a writeback service of a system scheduling cache, where the priority of the Cache writeback service is determined by the busyness of the system and the writeback queue of the Cache data block. In addition, in consideration of the separation of the card machine, such as when the mobile phone replaces the SIM card, and the cache of the non-volatile memory is associated with a specific SIM card, the cache manager module needs a SIM card-related identifier to manage the cache, for example In a specific embodiment, the integrated circuit card identification code ICCID of the SIM card may be associated with the Cache of the nonvolatile memory, but the specific implementation may not be limited to this implementation. When the mobile phone is subsequently booted up, when the cache of the non-volatile memory already has data, the cache manager module determines whether the ICCID associated with the cache of the non-volatile memory and the ICCID of the SIM card are consistent, when the cache of the non-volatile memory The associated ICCID and the ICCID of the SIM card indicate that the cache data of the non-volatile memory is consistent with the SIM card, and the mobile phone can directly load the required data from the cache of the non-volatile memory (for example, mobile operating system data). At the same time, the cache manager module can also write back the cache "dirty block" of the non-repeated memory that was not written back to the SIM card; when the ICCID is inconsistent, the non-volatile memory The data of the cache is not the data of the SIM card (the SIM card is replaced). hand After the machine is emptied or used as the cache Nand flash cache, the Nand flash cache mechanism is used to load the mobile phone operating system on the SIM card; or the Nand flash cache data is locked and saved, and the cache memory is cached. The Nand flash cache mechanism is invalid. The mobile phone can load the mobile phone operating system on the SIM card through the USB interface, and the user selects the loading mode.

The following describes a method for loading a mobile phone operating system based on a mobile phone buffer memory mechanism.

Referring to FIG. 4, the figure is a flowchart of a specific embodiment of a method for loading a mobile phone operating system based on a mobile phone buffer memory mechanism according to the present invention, which mainly includes:

Step 1: The virtual non-volatile memory is a cache memory of the SIM card. When the virtual implementation is implemented, refer to the foregoing description, and details are not described herein.

Step 2, pre-reading the operating system data of the mobile phone that needs to be accessed by the system to be read into the non-volatile memory of the virtual memory of the SIM card. In specific implementation, how to implement the pre-reading can refer to the foregoing description, where No longer;

Step 3: If the non-volatile memory stores the mobile phone operating system data for loading the required access, the mobile phone directly loads the mobile phone operating system from the non-volatile memory that is virtualized as a cache memory. Otherwise, the mobile phone is from the SIM. The card reads the required data into a non-volatile memory that is virtualized as a cache of the SIM card, and then reads data required to load the mobile phone operating system from the non-volatile memory.

It should be noted that, before loading the mobile phone operation in the present invention, the method further includes: checking whether the mobile phone operating system data required for loading is stored in the non-volatile memory, and specifically implementing, for example, taking the separation of the machine card, etc. The integrated circuit card of the SIM card can be identified The code is used as an association between the SIM card and the data stored in the non-volatile memory to distinguish whether the data of the non-volatile memory is consistent with the data on the SIM card. And checking whether the mobile phone operating system data for loading the required access is stored in the non-volatile memory may include: if the cache of the non-volatile memory has data, checking the cache of the non-volatile memory and the integrated circuit card identification code of the SIM card Whether they are the same, if they are the same, it is determined that the data of the cache of the non-volatile memory is consistent with the SIM card; otherwise, it is determined that the data of the cache of the non-volatile memory is inconsistent with the data of the SIM card (ie, the SIM card is replaced). After the mobile phone or empty the cache Nand flash cache, use the cache Nand flash cache mechanism to load the mobile phone operating system on the SIM card; or lock and save the data of the cache Nand flash cache, the cache Nand The flash cache mechanism is invalid, and the mobile phone loads the mobile phone operating system on the SIM card through the USB interface, and the user selects the loading mode.

The following describes a process of loading a mobile phone operating system in a specific embodiment. Referring to FIG. 5, the loading process mainly includes:

Step 101: The mobile phone is turned on;

Step 102: detecting whether the non-volatile memory cache of the mobile phone has data, if there is already data, proceeding to step 103, otherwise proceeding to step 106;

Step 103: Comparing whether the ICCID on the non-volatile memory cache and the SIM card are consistent. When the ICCID is the same, indicating that the data of the non-volatile memory cache is consistent with the SIM card, proceed to step 107; when the ICCID is inconsistent, enter the step 104;

Step 104: The cache of the non-volatile memory is inconsistent with the ICCID on the SIM card, and two startup modes are provided for the user to select; Step 105: The user selects to clear the non-volatile memory cache, and re-uses the non-volatile memory cache to load the SIM card mobile phone operating system;

Step 106: The mobile phone pre-predicts the data required to load the operating system from the SIM card through the USB interface, and saves the data to the non-volatile memory cache;

Step 107: The mobile phone loads the mobile phone operating system from the non-volatile memory cache, and the cache manager module manages the non-volatile memory cache, and continues to pre-read the files required for the system to run from the SIM card, and then Go to step 109; Step 108: The user selects to retain the data of the original non-volatile memory cache, the mobile phone locks the non-volatile memory cache, and closes the non-volatile memory cache mechanism, and the mobile phone passes the USB interface to load the operation on the SIM card. System

Step 109: Run the mobile operating system and the phone startup process ends. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are included in the present invention, should be included in the present invention. Within the scope of protection.

Claims

Rights request

A system for implementing a mobile phone buffer memory mechanism, comprising: a mobile phone, a SIM card for interacting with a mobile phone through a communication interface, and a non-volatile memory virtualized as a cache memory of the SIM card, wherein the SIM The card stores the mobile phone operating system and application data, and the mobile phone control pre-reads the mobile phone operating system and application data stored by the SIM card that needs to be frequently accessed by the system into a non-volatile memory that is virtualized as a cache of the SIM card. And read the corresponding data directly from the non-volatile memory when the mobile phone accesses the corresponding data.

2. The system according to claim 1, wherein the mobile phone comprises: a driver module, configured to provide a cache on the mobile phone to virtualize the non-volatile memory as a SIM card;

The central processing unit is configured to control the above modules, and control the pre-reading of the mobile phone operating system and application data stored by the SIM card that needs to be frequently accessed by the system into the non-volatile memory of the virtual memory of the SIM card.

3. The system according to claim 2, wherein the central processor further controls when a data block in the non-volatile memory as the cache is updated Write the updated data block back to the SIM card.

4. A method for loading a mobile phone operating system based on a mobile phone buffer memory mechanism, the method comprising:

The virtual non-volatile memory is a cache of the SIM card;

5. The method according to claim 4, wherein before loading the mobile phone operating system, the method further comprises:

The method according to claim 5, wherein the integrated circuit card identification code of the SIM card is used as an association between the SIM card and the non-volatile memory for storing data consistency, and the checking is performed in the non-volatile memory. Whether to store the phone operation that loads the required access System data includes:

Checking whether the non-volatile memory and the SIM card's integrated circuit card identification code are the same. If they are the same, it is determined that the non-volatile memory stores the mobile phone operating system data for loading the required access. Otherwise, it is determined that the non-volatile memory is not stored. There is mobile operating system data loaded for the required access.

7. The method according to claim 5, further comprising: controlling, when the data block in the non-volatile memory as the cache is updated, the central processor to return the updated data block Write to the SIM card.

8. The method according to claim 7, wherein the controlling to write back the updated data block to the SIM card is: according to the condition of the operating system, the utilization rate of the communication link of the SIM card, the write-back queue The length and the power of the phone determine the priority to perform the write back.