CN101155364B - A method for expanding storage in mobile terminal - Google Patents

Abstract

The invention relates to a method for expanding storage in a mobile phone terminal. A baseband (1) and a coprocessor (2) share an expansion memory card (3) or a built-in USB storage device, including: a line connecting the baseband and a USB interface of the coprocessor And according to the USB OTG protocol, establish a mutual communication connection as required; the baseband processor establishes a connection with the memory card or device through the communication connection and identifies and loads it. At the same time, the memory card or device can also be used as an external storage device for a PC. Such as U disk use. This method uses USB OTG protocol technology to realize the sharing of baseband and coprocessor expansion memory card. Compared with the current mobile phone, only a small number of lines and switches are added to the hardware, and the volume and weight of the mobile phone are not increased. The most important thing is to meet It meets the demand of 3G mobile phone terminals to freely upload/download data; furthermore, the use of T-card, which is the main external storage device in mobile phones at present, will not encounter the constraints of consumption concepts, and it is easy to operate. Therefore, this technology has great application prospect.

Description

A method for expanding storage in mobile terminal

technical field

The invention relates to electronics and communication technology, in particular to a method for expanding storage in a mobile phone terminal.

Background technique

At present, mobile phone technology has achieved great development, and new functions of mobile phones are emerging one after another. From a single calling function to a Smart Phone, MP3 mobile phones, karaoke mobile phones, camera mobile phones, MP4 mobile phones and other mobile phones have appeared during this period. smart phone. Almost all of these new feature phones are possible without the expansion of additional storage space. Especially as the 3G era is coming to us, people will have more and more expectations for 3G mobile terminals, such as: videophone, camera, 3G services, etc. As we all know, the characteristic of 3G network is that it can provide users with powerful data service functions, so users hope to freely browse the WEB and upload/download data freely, including copying data between mobile phones. The provision of all these functions and services requires sufficient storage space for support.

Fig. 1 is the minimum system block diagram of the mobile phone. With the improvement of microelectronic integration, 3G (TD-SCDMA) baseband Baseband has integrated MP3 playback function. As can be seen from the system block diagram, Combo Flash is the main and only storage device. Although the USB interface on the baseband 1 has been connected to the external USB connection interface 4, as long as the software supports it, the user can download MP3 songs and MIDI ringtones to the Combo Flash of the mobile phone through the PC or wireless network, but due to the 3G protocol stack and other software It takes up a lot of space, and the space left for users to store these data is already very small. If it is solved by increasing the space of NOR Flash, the increase in cost will be significant. Even though some 3G platforms can now use NAND Flash to store system programs, although a large storage space can be obtained, it is almost impossible to directly copy data between mobile phones.

At present, a mobile phone generally adopts a memory card, that is, a memory card expansion, to increase the capacity of the mobile phone itself. Fig. 2 is a schematic block diagram of a mobile phone system with a multimedia processor. It can be seen from the system block diagram that compared with Figure 1, an additional multimedia processor Multimedia Processor is added as the coprocessor 2 of the baseband 1 to complete functions such as image codec, MP4, MP3, camera and recording. In order to provide these functions to the user, the multimedia processor 2 also provides a T card 3 interface, which provides the user with a storage space for storing user data; in addition, the multimedia processor also provides a USB interface, so that the user can use this interface from Download data such as movies and MP3 music on the PC to the inserted T card, but the user still cannot directly store the wireless network downloaded MP3 songs and MID to the inserted T card. Further, the USB interface of the baseband 1 and the USB interface of the multimedia processor can be connected to a unified external USB connection interface 4 through a selection switch, which is convenient for users to use. When the user uses the mobile phone as a Modem, the USB interface on the external USB connection interface 4 is connected to the USB port on the baseband 1; when the user needs to download user data, the USB interface on the external USB connection interface 4 is connected to the multimedia processor 2 on the USB port. However, the system still does not solve the following three problems: ① In the 3G information age, people will hope to upload/download network information anytime and anywhere, and handle e-mail and e-commerce in real time, not just satisfying the MODEM acting as a PC, so that Mobile loses the power of mobile communication. meaning. ②Although the baseband is used as the main control in the system and can access the T card through the multimedia processor, if the network data and user data such as uploading pictures are downloaded in this way, the speed of data transmission will be a problem; ③Although the current expansion There are many means of mobile phone storage space, such as: micro hard drive, but the cost of this kind of memory is very expensive, and it is only used in high-end mobile phones now, so this type of mobile phone is only suitable for high-end users and cannot meet the needs of the public.

The main reason for the second problem above in mobile phones with multimedia processors is that there is a fatal weakness in the USB technology before 2001: the HOST is the core of the USB topology, and any data transmission initiation and control is very important. It is done by HOST, all USB peripherals can only establish connection with HOST, any two peripherals or HOST cannot communicate directly.

Contents of the invention

The technical problem to be solved by the present invention is to provide a mobile phone storage expansion method, which solves the problem of large-capacity storage space required for mobile terminals to freely upload/download user data in the 3G network era, without affecting the speed of free upload/download, and retaining Mobile terminals require small and portable features.

Above-mentioned technical problem of the present invention solves like this, provides a kind of method for expanding storage in mobile phone terminal, it is characterized in that, baseband processor shares the expansion memory card that is connected with coprocessor or the PC machine USB memory device that is built in in mobile phone, Include the following steps:

1.1) The line is connected to the USB interface of the baseband and the coprocessor, and a mutual communication connection is established according to the USB OTG protocol as required;

1.2) The baseband processor establishes a connection with the expansion memory card or USB storage device through the communication connection, and identifies and loads the expansion memory card or USB storage device.

According to the method provided by the present invention, the USB interface of the baseband and the coprocessor includes a dual-role device DRD set as a server HOST and a single external device POD or a dual-role device DRD set as a peripheral, and can establish mutual Point-to-point Pear to Pear communication connection.

According to the method provided by the present invention, the dual-role device DRD set as the server HOST can be used as a peripheral when communicating with a computer.

According to the method provided by the present invention, the mobile phone includes a unified external USB connection interface of the mobile phone connected to the USB interface line of the baseband and coprocessor, the USB interface of the baseband processor, the USB interface of the coprocessor and the external USB The connection interface is provided with a selection switch, and according to the requirement, the selection switch selects and conducts the line between the baseband and the USB interface of the coprocessor.

According to the method provided by the present invention, the external USB connection interface is connected to the computer USB port, and the method also includes:

4.1) Selecting the selection switch according to the corresponding user to select and conduct the line between the coprocessor USB interface and the external USB connection interface;

4.2) The computer recognizes and loads the extended memory card through its USB port.

Now the mobile phone connected with the extended memory card can be used as a USB flash drive of the computer.

According to the method provided by the present invention, the coprocessor USB interface is a single external device POD or a dual-role device DRD set as a peripheral device.

According to the method provided by the present invention, the external USB connection interface is connected to the computer USB port, and the method also includes:

6.1) According to the selection of the selection switch by the corresponding user, the line between the USB interface of the baseband processor and the external USB connection interface is selected and turned on;

6.2) The computer connects to the data network wirelessly with the mobile phone through its USB port.

According to the method provided by the present invention, the USB interface of the baseband processor is a single external device POD or a dual-role device DRD set as a peripheral device.

According to the method provided by the present invention, the selection switch includes but not limited to three ways: ① one bidirectional switch and one on-off switch or ② three on-off switches or ③ two bidirectional switches. The switch or combined switch can be hard/soft set on and off corresponding to the line according to the user's choice; the soft setting also includes a USB insertion detection circuit, which is used to start the line selection switch setting menu, and the user can control the switch or combination through software after selection. The specific on-off of the switch.

According to the method provided by the present invention, the coprocessor is a multimedia processor.

According to the method provided by the present invention, the expansion memory card is a T card.

According to the method provided by the present invention, the extended memory card can also be an SD card, MMC card, miniSD card, etc., as long as the coprocessor supports the memory card.

A method for expanding storage in a mobile phone terminal provided by the present invention adopts the USB OTG protocol technology to realize the sharing of baseband and coprocessor expansion memory cards. Increase the volume and weight of the mobile phone, and most importantly, meet the needs of 3G mobile phone terminals to upload/download data freely; further, T card is the main external storage device in mobile phones at present, and this technology continues to use this storage device, so this The application of technology will not encounter the constraints of consumption concepts. In addition, it is easy to operate, so this technology has great application prospects.

Description of drawings

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is the hardware block diagram of the minimum system of the mobile phone at present.

Fig. 2 is a hardware block diagram of the current mobile phone system with multimedia functions.

Fig. 3 is a hardware connection block diagram corresponding to the storage expansion method of the present invention.

FIG. 4 is a schematic diagram of a software flow corresponding to the storage expansion method of the present invention.

Detailed ways

At first, explain the key of the present invention: until December, 2001, portable USB agreement OTG1.0, promptly USB On-The-Go version agreement 1.0, release officially. In this way, the peripherals that comply with USB OTG completely abandon the PC, and can be used as both HOST and peripherals. And to achieve point-to-point Pear to Pear communication with another USBOTG peripheral, this type of device has become a dual-role device Dual-Role Device, referred to as DRD. Two types of devices are defined in USB OTG: dual-role device DRD and single external device Peripheral-Only Device, referred to as POD.

The development of T-Flash card technology is utilized in the following preferred embodiments of the present invention. Due to the small size and lightness of the T card, it is very suitable for application in mobile phones. Now it has been widely used in MP4 mobile phones. With the development of 2G and higher storage capacity T cards, there is reason to believe that it will still be the main medium for mobile phone portable storage for a long time to come.

The present invention is proposed according to current technical development direction, and mobile phone system as shown in Figure 2, the coprocessor 2 of baseband, i.e. multimedia processor, has included USB module, and this USB module supports USB OTG function. Similarly, the USB module of baseband 1 must also support the USB OTG function, and one of the two USB interfaces must be a dual-role device DRD. In this way, the two USB interfaces can realize point-to-point communication. At this time, not only the coprocessor can access the T card, but also the baseband can directly access the T card 3, certainly at a higher rate. Therefore, when the user accesses the 3G network, the data required by the user can be directly downloaded to the T card; and the data of the T card can also be uploaded to the 3G network. The completion of all these functions is completed on the move, rather than having to be connected with a PC to complete these functions. Therefore, the outstanding advantage of the present invention is that: a U disk is directly configured for the baseband, so as to satisfy users' demands for freely uploading/downloading network information in the 3G era.

At the same time, MP4 and MP3 are also the needs of users, and also require large-capacity storage space. The present invention can also meet the needs of users through the setting of software and hardware. The mobile terminal can also be used as the Modem of the PC, so that the PC can surf the Internet wirelessly through the mobile terminal; in addition, this technology supports the function of the mobile phone as a USB flash drive of the PC, so that the user can still download the information required by the user from the PC. In essence, the present invention realizes that the baseband and the coprocessor share a T card through the support of software and hardware, improves the utilization rate of the T card, and can ensure the characteristics of lightness, thinness and smallness of the mobile phone.

As shown in Fig. 3, the mobile phone of the present invention has additionally added two analog switches A, B and a USB insertion detection circuit 6 on the basis of the original mobile phone. In the initial state, switch 1 is connected to the external USB connection interface, mainly because some basebands download system programs through USB; switch 2 is connected to switch 1, so that the USB connection is guaranteed to be single when the system starts.

The present invention directly configures the U disk for the baseband and provides the mobile terminal as the wireless network card of the PC and the corresponding process of the mobile storage device is further described as follows:

(1) The present invention directly configures the implementation process of the U disk to the baseband and includes: (1) the baseband side and the USB module side (below taking the USB module in the coprocessor as an example) must support the USB OTG function, at least one side thereof It must be a dual-role device (DRD) (hereinafter, the baseband side USB is a dual-role device to illustrate), to ensure the establishment of Pear To Pear communication; (2) the mobile phone must provide storage type options on the user's man-machine interface; (3) After the system is started, if the user wishes to download data from the 3G network to the T card, of course assuming that the T card has been inserted, a storage type option prompt will appear on the man-machine interface of the mobile phone, and the user can choose according to needs; (4) If you choose to download to the T card, At this point, the selection switch 1 is switched to the selection switch 2 side; (5) the baseband side identifies the storage device and loads the device; (6) the mobile phone side accesses the network, selects the resource to be downloaded, and confirms the download. The data is downloaded to the T card; (7) After the download is completed, the mobile phone man-machine interface prompts "whether to release the T card", if you choose "Yes", the baseband notifies the coprocessor USB module, and the HOST releases the USB. After the interaction is completed, the simulated Switch to the external USB connection interface side.

(2) The present invention provides mobile phone terminal as the wireless network card of PC and the implementation process of mobile storage device comprises: (1) when USB interface inserts external USB connection interface, USB detection circuit completes the insertion detection of USB, and USB is inserted into The information is reported to the baseband; (2) The human-machine interface of the mobile terminal appears the USB interface setting selection, one is for the PC to access the wireless network; the other is for the PC to access the T card; (3) If you choose to access the wireless network, first The baseband side sets the USB OTG function as a peripheral device, and then the PC side completes the identification and loading of the device, so that the mobile terminal can be used as a Modem of the PC; (4) Similarly, if the T card is selected, First, select switch 1 and select 2 need to be switched, if the USB of the coprocessor is DRD, the device must be set as a peripheral, and then the PC side completes the identification and loading of the device; otherwise, directly identify the device and loading; (5) If the PC completes the operation of the network or T card, the PC unloads the peripherals and completes an operation; (6) as long as the USB is connected to the mobile terminal, the patented technology can be set through the mobile phone man-machine interface, After one USB operation is completed, another USB operation can be continued to be completed, which conveniently meets various needs of the user.

As shown in Figure 4, the present invention is further detailed according to the unified software process corresponding to the above-mentioned processes (1) and (2), specifically including the following specific steps:

40) start;

41) initialization; setting analog switches A and B; baseband USB access external USB connection interface; coprocessor USB does not access external USB connection interface;

42) Utilize the USB detection circuit to complete the insertion detection of USB and according to whether the PC is connected or not, the USB access specific interrupt flag I=1 or I=0 is set; Judging I=1, enter step 430); I=0, turn into step 440);

430) Prompt the user to choose to access the 3G network or the T card; access the 3G network and enter step 4311); access the T card and proceed to step 4321);

4311) The interface of the baseband side USB OTG is set as a peripheral;

4312) PC-side USB identification device;

4313) Establish a network connection;

4314) The user uses 3G services;

4315) determine whether it is completed, if not return to step 4314); yes, disconnect the USB connection between the PC and the mobile phone, return to step 42);

4321) setting switch;

4322) The interface of the coprocessor side USB OTG is set as a peripheral;

4323) PC-side USB identification device;

4324) load the T card storage device;

4325) exchanging data;

4326) is completed, if not, return to step 4325); yes, disconnect the USB connection between the PC and the mobile phone, and return to step 42);

440) Whether the baseband side wishes to visit the T card, or return to step 42); Yes, enter the next step;

4401) determine whether the T card is inserted, and return to step 440); yes, enter the next step;

4402) setting the switch to establish the electrical connection;

4403) The interface of the baseband side USB OTG is set as HOST mode, and the interface of the coprocessor side USB OTG is a peripheral;

4404) access to 3G network;

4405) Utilize T card to download/upload data;

4406) is completed, and if no, return to step 4405); yes, disconnect the connection between the T card and the mobile phone, and return to step 42).

In the above process, both the baseband and the coprocessor side use the dual-role device DRD, but one of them can use the dual-role device DRD, and the other can use the single external device POD, and the above process is modified accordingly.

Claims (10)

1. a method for expanding storage in mobile phone terminal, it is characterized in that, baseband (1) shares the expansion memory card (3) that is connected with coprocessor (2) or the PC USB memory device that is built in in mobile phone, comprises The following steps: 1.1) the line connects the USB interface of the baseband and the coprocessor and establishes a mutual communication connection as required by the USB OTG protocol; 1.2) The baseband establishes a connection with the expansion memory card or USB storage device through the communication connection and identifies and loads the expansion memory card or USB storage device; Wherein, the mobile phone includes a unified external USB connection interface (4) of the mobile phone connected to the USB interface line of the baseband and the coprocessor, and the USB interface of the baseband, the USB interface of the coprocessor and the external USB connection interface are provided with A selection switch, according to the requirement, the selection switch selects and conducts the line between the baseband and the USB interface of the coprocessor. 2. method according to claim 1, it is characterized in that, the USB interface of described baseband (1) and coprocessor (2) comprises a dual-role device DRD and a single external device POD set as server HOST, or a A dual-role device DRD set as a server HOST and a dual-role device DRD set as a peripheral, so that the USB interface of the baseband (1) and the USB interface of the coprocessor (2) establish a point-to-point Peer to Peer communication connection with each other. 3. method according to claim 1, it is characterized in that, be connected to computer (5) USB port by described external USB connection interface (4), this method also comprises: 4.1) According to the selection of the selection switch by the corresponding user, the line between the USB interface of the coprocessor and the external USB connection interface is selected and turned on; 4.2) The computer recognizes and loads the extended memory card (3) through its USB port. 4. The method according to claim 3, characterized in that, the USB interface of the coprocessor (2) is a single external device POD or a dual-role device DRD set as a peripheral. 5. method according to claim 1, it is characterized in that, be connected to computer (5) USB port by described external USB connection interface (4), this method also comprises: 6.1) select the line between the USB interface of the baseband and the external USB connection interface according to the selection of the selection switch by the corresponding user; 6.2) The computer connects to the data network wirelessly with the mobile phone through its USB port. 6. The method according to claim 1, characterized in that, the USB interface of the baseband (1) is a single external device POD or a dual-role device DRD set as a peripheral. 7. The method according to claim 1, wherein the selection switch is composed of two or three switches. 8. The method according to claim 1, 3 or 5, characterized in that the extended memory card (3) is a T-card. 9. The method according to claim 1, 3 or 5, characterized in that the extended memory card (3) is an SD card, MMC card or miniSD card. 10. The method according to claim 1, 3 or 5, characterized in that the expansion memory card (3) is an external storage device supported by a coprocessor. the

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