CN103905487A - File sharing method and electronic equipment - Google Patents
File sharing method and electronic equipment Download PDFInfo
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- CN103905487A CN103905487A CN201210576434.7A CN201210576434A CN103905487A CN 103905487 A CN103905487 A CN 103905487A CN 201210576434 A CN201210576434 A CN 201210576434A CN 103905487 A CN103905487 A CN 103905487A
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Abstract
The invention discloses a file sharing method and electronic equipment. The method is applied to first electronic equipment. The first electronic equipment comprises at least one storage unit; and a first file is stored in the storage unit. The method comprises steps: when the first electronic equipment is connected with second electronic equipment via a first interface, a first virtual communication interface is built in the first electronic equipment via the first interface; and on the basis of a preset first communication protocol, the first virtual communication interface is used for data communication with the second electronic equipment so as to enable the second electronic equipment to acquire the first file.
Description
Technical field
The present invention relates to electronic applications, relate in particular to a kind of file sharing method and electronic equipment.
Background technology
Along with the development of electronic technology, increasing electronic equipment appears in people's life.Wherein, due to easy to carry, mobile phone becomes the communication tool of extensive use, so be subject to more and more users' welcome.
In we pass through USB shared file at present between mobile phone and PC, mobile phone can unload the file system on SD card, then gives PC the control of subregion shared needs.Thereby PC can be realized the attended operation such as file copy, deletion to this subregion.
But present inventor realizing in the process of invention technical scheme in the embodiment of the present application, finds that above-mentioned technology at least exists following technical problem:
Access when cannot realizing SD between PC and mobile phone, if the tinkle of bells file of system is set to the tinkle of bells file on SD card, when this SD card subregion is by PC control time, mobile phone just cannot have been play this tinkle of bells file again.
Summary of the invention
The application provides a kind of file sharing method and electronic equipment, has solved the technical problem of access when cannot realizing SD card between PC and mobile phone in prior art.
On the one hand, the application provides following technical scheme by the application's a embodiment:
A kind of file sharing method, is applied in the first electronic equipment, and wherein, described the first electronic equipment at least has a memory cell, stores the first file in described memory cell, and described method comprises:
In the time that described the first electronic equipment is connected with described the second electronic equipment by first interface, in described the first electronic equipment, set up the first virtual communication interface by described first interface;
Based on the first default communication protocol, utilize described the first virtual communication interface and described the second electronic equipment to carry out data communication, so that described the second electronic equipment obtains described the first file.
Preferably, described first interface is: the first USB interface of described the first electronic equipment; Described the first virtual communication interface is: the first Ethernet interface; Described the first communication protocol is: NFS communication protocol.
Preferably, the described first virtual communication interface of setting up in described the first electronic equipment by described first interface, is specially:
A USB driver upper strata in the first operating system of described the first electronic equipment, encapsulate the first ethernet driver, thereby in described the first operating system, set up based on described the first USB interface, and described first Ethernet interface corresponding with described the first ethernet driver;
Wherein, a described USB driver is driver corresponding to described the first USB interface; Described the first Ethernet interface is described the first virtual communication interface.
Preferably, described the first communication protocol based on default, utilizes described the first virtual communication interface and described the second electronic equipment to carry out data communication, specifically comprises:
Obtain an IP address of described the first electronic equipment, and obtain the 2nd IP address of described the second electronic equipment;
Based on described NFS communication protocol, and a described IP address, described the 2nd IP address, between described the first Ethernet interface and the second Ethernet interface of described the second electronic equipment, set up Ethernet and connect, so that described the second electronic equipment can obtain described the first file by the 2nd NFS service routine that is arranged on described the second electronic equipment from described storage element.
Preferably, described the second Ethernet interface, is specially:
By the 2nd USB driver upper strata in the second operating system of described the second electronic equipment, encapsulate the second ethernet driver, thereby in described the second operating system, foundation based on secondary USB interface, and the Ethernet interface corresponding with described the second ethernet driver;
Wherein, described secondary USB interface is the USB interface that described the second electronic equipment has; Described the 2nd USB driver is the driver that described secondary USB interface is corresponding.
Preferably, described between described first Ethernet interface and the second Ethernet interface of described the second electronic equipment of described the first electronic equipment, setting up Ethernet connects, so that described the second electronic equipment can obtain described the first file by the 2nd NFS service routine that is arranged on described the second electronic equipment from described storage element, specifically comprise:
Start the NFS service routine in described the first electronic equipment;
By a described NFS service routine, the operating right of the first file described in described memory cell is set for making described the second electronic equipment there is the authority of reading, so that described the second electronic equipment can, based on the described authority that reads, obtain described the first file by described the 2nd NFS service routine access.
On the other hand, the application, by the application's a embodiment, provides following technical scheme:
A kind of electronic equipment, described the first electronic equipment at least has a memory cell, stores the first file in described memory cell, and described electronic equipment comprises:
Set up unit, in the time that described the first electronic equipment is connected with described the second electronic equipment by first interface, in described the first electronic equipment, set up the first virtual communication interface by described first interface;
Communication unit, for the first communication protocol based on default, utilizes described the first virtual communication interface and described the second electronic equipment to carry out data communication, so that described the second electronic equipment obtains described the first file.
Preferably, described first interface is: the first USB interface of described the first electronic equipment; Described the first virtual communication interface is: the first Ethernet interface; Described the first communication protocol is: NFS communication protocol.
Preferably, the described unit of setting up, is specially:
Encapsulation subelement, a USB driver upper strata in the first operating system of described the first electronic equipment, encapsulate the first ethernet driver, thereby in described the first operating system, set up based on described the first USB interface, and described first Ethernet interface corresponding with described the first ethernet driver;
Wherein, a described USB driver is driver corresponding to described the first USB interface; Described the first Ethernet interface is described the first virtual communication interface.
Preferably, described communication unit, specifically comprises:
Obtain subelement, for obtaining an IP address of described the first electronic equipment, and obtain the 2nd IP address of described the second electronic equipment;
Set up subelement, be used for based on described NFS communication protocol, and a described IP address, described the 2nd IP address, between described the first Ethernet interface and the second Ethernet interface of described the second electronic equipment, set up Ethernet and connect, so that described the second electronic equipment can obtain described the first file by the 2nd NFS service routine that is arranged on described the second electronic equipment from described storage element.
Preferably, described the second Ethernet interface, is specially:
By the 2nd USB driver upper strata in the second operating system of described the second electronic equipment, encapsulate the second ethernet driver, thereby in described the second operating system, foundation based on secondary USB interface, and the Ethernet interface corresponding with described the second ethernet driver;
Wherein, described secondary USB interface is the USB interface that described the second electronic equipment has; Described the 2nd USB driver is the driver that described secondary USB interface is corresponding.
Preferably, the described subelement of setting up, specifically comprises:
Start module, for starting a NFS service routine of described the first electronic equipment;
Module is set, by a described NFS service routine, the operating right of the first file described in described memory cell is set for making described the second electronic equipment there is the authority of reading, so that described the second electronic equipment can, based on the described authority that reads, obtain described the first file by described the 2nd NFS service routine access.
The one or more technical schemes that provide in the embodiment of the present application, at least have following technique effect or advantage:
1, execute in example in the application real, be connected by the Ethernet of setting up mobile phone and PC in USB interface, and needs and the shared file system of PC are passed through to NFS NFS, share, so, solve the technical problem of access when cannot realizing SD card between PC and mobile phone in prior art, and then realized the technique effect that can simultaneously access SD card memory cell between mobile phone and PC.
2, execute in example in the application real; cellphone subscriber can arrange the authority of each shared file in described shared file (as: read-only authority, access limit etc.); so that described PC need to operate described shared file according to described authority, realized cellphone subscriber can to freedom of information in mobile phone carry out the technique effect of safeguard protection.
Accompanying drawing explanation
Fig. 1 is the flow chart of file sharing method in the embodiment of the present application;
Fig. 2 is the structured flowchart of electronic equipment in the embodiment of the present application.
Embodiment
The embodiment of the present application is by providing a kind of file sharing method, solved the technical problem of access when cannot realizing SD card between PC and mobile phone in prior art.
The technical scheme of the embodiment of the present application is for solving the problems of the technologies described above, and general thought is as follows:
A kind of file sharing method, is applied in the first electronic equipment, and wherein, described the first electronic equipment at least has a memory cell, stores the first file in described memory cell, and described method comprises:
First,, in the time that described the first electronic equipment is connected with described the second electronic equipment by first interface, in described the first electronic equipment, set up the first virtual communication interface by described first interface;
Then,, based on the first default communication protocol, utilize described the first virtual communication interface and described the second electronic equipment to carry out data communication, so that described the second electronic equipment obtains described the first file.
In order better to understand technique scheme, below in conjunction with Figure of description and concrete execution mode, technique scheme is described in detail.
Embodiment mono-
As shown in Figure 1, the application one embodiment provide a kind of file sharing method, is applied in the first electronic equipment, and wherein, described the first electronic equipment at least has a memory cell, stores the first file in described memory cell, and described method comprises:
In specific implementation process, described the first electronic equipment can be smart mobile phone or the panel computer of an ARM framework, be specially which kind of electronic equipment for described the first electronic equipment, the embodiment of the present application is not done concrete restriction, described memory cell can be TF card/SD card of mobile telephone external, or the ROM of embedded in mobile phone, below just take described the first electronic equipment as a smart mobile phone, described memory cell is an external SD card, and the application is elaborated.
Described first interface is: the first USB interface of described the first electronic equipment; Described the first virtual communication interface is: the first Ethernet interface; Described the first communication protocol is: NFS communication protocol.
In specific implementation process, the first interface of telling is a USB interface of described smart mobile phone; Described the first virtual interface is based on described USB interface, the Ethernet interface of foundation; Described the first communication protocol is: NFS communication protocol.
The described first virtual communication interface of setting up in described the first electronic equipment by described first interface, is specially:
A USB driver upper strata in the first operating system of described the first electronic equipment, encapsulate the first ethernet driver, thereby in described the first operating system, set up based on described the first USB interface, and described first Ethernet interface corresponding with described the first ethernet driver;
Wherein, a described USB driver is: driver corresponding to described the first USB interface; Described the first Ethernet interface is: described the first virtual communication interface.
In specific implementation process, described the first operating system can be Android 4.0 operating systems, by the USB driver upper strata in described Android 4.0 systems, encapsulate first ethernet driver corresponding with described the first Ethernet interface, thereby in the described Android of mobile phone 4.0 systems, set up USB interface-based first Ethernet interface.
After executing described step 101, just can perform step 102, that is: the first communication protocol based on default, utilizes described the first virtual communication interface and described the second electronic equipment to carry out data communication, so that described the second electronic equipment obtains described the first file.
In specific implementation process, described the second electronic equipment can be the PC of an X86-based, and described PC has the second operating system, can be windows operating system, as: 7600 versions of windows7; Or Mac OS X; Or (SuSE) Linux OS, as: red flag Linux, be specially which kind of situation for described the second operating system and described the second electronic equipment, the embodiment of the present application is not done concrete restriction.The just PC take described the second electronic equipment as an X86-based of the embodiment of the present application below, 7600 versions of the windows7 that described the second operating system is windows, are illustrated.
Described the first communication protocol based on default, utilizes described the first virtual communication interface and described the second electronic equipment to carry out data communication, specifically comprises:
Obtain an IP address of described the first electronic equipment, and obtain the 2nd IP address of described the second electronic equipment;
Based on described NFS communication protocol, and a described IP address, described the 2nd IP address, between described the first Ethernet interface and the second Ethernet interface of described the second electronic equipment, set up Ethernet and connect, so that described the second electronic equipment can obtain described the first file by the 2nd NFS service routine that is arranged on described the second electronic equipment from described storage element.
Described the second Ethernet interface, is specially:
By the 2nd USB driver upper strata in the second operating system of described the second electronic equipment, encapsulate the second ethernet driver, thereby in described the second operating system, foundation based on secondary USB interface, and the Ethernet interface corresponding with described the second ethernet driver;
Wherein, described secondary USB interface is the USB interface that described the second electronic equipment has; Described the 2nd USB driver is the driver that described secondary USB interface is corresponding.
In specific implementation process, on the 2nd USB driver in the described windows7.7600 operating system of described PC, encapsulate the second ethernet driver, thereby in described windows7.7600 operating system, set up based on secondary USB interface, and the Ethernet interface corresponding with described the second ethernet driver;
In specific implementation process, a described IP address and described the 2nd IP address can be pre-configured static ip address; Also can be the dynamic IP addressing of dynamic assignment.
The embodiment of the present application, for the dynamic IP addressing that how to configure smart mobile phone and PC, provides following two kinds of Dynamic Configuration:
The first, at described smart mobile phone during as main control device, described smart mobile phone is for self distributing the first dynamic IP addressing; Described smart mobile phone arranges protocol DHCP by DynamicHost, for described PC distributes the second dynamic IP addressing.
The second, be main control device at described PC, and described PC is while self distributing described the second dynamic address, described smart mobile phone receives described PC, and by DynamicHost, protocol DHCP to be set be that described smart mobile phone distributes described the first dynamic IP addressing.
Based on described based on described NFS communication protocol, an and described IP address (comprising described static ip address and described dynamic IP addressing), described the 2nd IP address (comprising described static ip address and described dynamic IP addressing), between described the first Ethernet interface and the second Ethernet interface of described the second electronic equipment, setting up Ethernet connects, in described memory cell, set up a NFS, and described the first file is placed in to described NFS, described the first file is shared, make described PC access described NFS by NFS service routine, thereby obtain described the first file.
Described between described first Ethernet interface and the second Ethernet interface of described the second electronic equipment of described the first electronic equipment, setting up Ethernet connects, so that described the second electronic equipment can obtain described the first file by the 2nd NFS service routine that is arranged on described the second electronic equipment from described storage element, specifically comprise:
Start the NFS service routine in described the first electronic equipment;
By a described NFS service routine, the operating right of the first file described in described memory cell is set for making described the second electronic equipment there is the authority of reading, so that described the second electronic equipment can, based on the described authority that reads, obtain described the first file by described the 2nd NFS service routine access.
In specific implementation process, described smart mobile phone can read authority (as: read-only authority, access limit) to described to the first file setting by the NFS service routine of installing wherein, so that described PC, in the time reading described the first file by NFS service routine, need to operate based on the described authority that reads.
Based on same inventive concept, another embodiment of the application provides a kind of electronic equipment of the method for implementing file-sharing described in the embodiment of the present application.
As shown in Figure 2, a kind of electronic equipment, described the first electronic equipment at least has a memory cell, stores the first file in described memory cell, and described electronic equipment comprises:
Set up unit 201, in the time that described the first electronic equipment is connected with described the second electronic equipment by first interface, in described the first electronic equipment, set up the first virtual communication interface by described first interface;
Described first interface is: the first USB interface of described the first electronic equipment; Described the first virtual communication interface is: the first Ethernet interface; Described the first communication protocol is: NFS communication protocol.
The described unit 201 of setting up, is specially:
Encapsulation subelement, a USB driver upper strata in the first operating system of described the first electronic equipment, encapsulate the first ethernet driver, thereby in described the first operating system, set up based on described the first USB interface, and described first Ethernet interface corresponding with described the first ethernet driver;
Wherein, a described USB driver is: driver corresponding to described the first USB interface; Described the first Ethernet interface is: described the first virtual communication interface.
Described communication unit 202, specifically comprises:
Obtain subelement, for obtaining an IP address of described the first electronic equipment, and obtain the 2nd IP address of described the second electronic equipment;
Set up subelement, be used for based on described NFS communication protocol, and a described IP address, described the 2nd IP address, between described the first Ethernet interface and the second Ethernet interface of described the second electronic equipment, set up Ethernet and connect, so that described the second electronic equipment can obtain described the first file by the 2nd NFS service routine that is arranged on described the second electronic equipment from described storage element.
Described the second Ethernet interface, is specially:
By the 2nd USB driver upper strata in the second operating system of described the second electronic equipment, encapsulate the second ethernet driver, thereby in described the second operating system, foundation based on secondary USB interface, and the Ethernet interface corresponding with described the second ethernet driver;
Wherein, described secondary USB interface is the USB interface that described the second electronic equipment has; Described the 2nd USB driver is the driver that described secondary USB interface is corresponding.
The described subelement of setting up, specifically comprises:
Start module, for starting a NFS service routine of described the first electronic equipment;
Module is set, by a described NFS service routine, the operating right of the first file described in described memory cell is set for making described the second electronic equipment there is the authority of reading, so that described the second electronic equipment can, based on the described authority that reads, obtain described the first file by described the 2nd NFS service routine access.
The electronic equipment that the electronic equipment of introducing due to the present embodiment adopts for implementing the method for file-sharing in the embodiment of the present application, so method of the file-sharing based on introducing in the embodiment of the present application, those skilled in the art can understand the present embodiment electronic equipment embodiment with and various version, so the method how realizing in the embodiment of the present application for this electronic equipment at this is introduced no longer in detail.As long as those skilled in the art implement the electronic equipment that in the embodiment of the present application, the method for file-sharing adopts, all belong to the scope of the application institute wish protection.
Technical scheme in above-mentioned the embodiment of the present application, at least has following technique effect or advantage:
1, in the embodiment of the present application, be connected by the Ethernet of setting up mobile phone and PC in USB interface, and needs and the shared file system of PC are passed through to NFS NFS, share, so, solve the technical problem of access when cannot realizing SD card between PC and mobile phone in prior art, and then realized the technique effect that can simultaneously access SD card memory cell between mobile phone and PC.
2, in the embodiment of the present application; cellphone subscriber can arrange the authority of each shared file in described shared file (as: read-only authority, access limit etc.); so that described PC need to operate described shared file according to described authority, realized cellphone subscriber can to freedom of information in mobile phone carry out the technique effect of safeguard protection.
Although described the preferred embodiments of the present invention, once those skilled in the art obtain the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to be interpreted as comprising preferred embodiment and fall into all changes and the modification of the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (12)
1. a file sharing method, is applied in the first electronic equipment, and wherein, described the first electronic equipment at least has a memory cell, stores the first file in described memory cell, it is characterized in that, described method comprises:
In the time that described the first electronic equipment is connected with described the second electronic equipment by first interface, in described the first electronic equipment, set up the first virtual communication interface by described first interface;
Based on the first default communication protocol, utilize described the first virtual communication interface and described the second electronic equipment to carry out data communication, so that described the second electronic equipment obtains described the first file.
2. the method for claim 1, is characterized in that, described first interface is: the first USB interface of described the first electronic equipment; Described the first virtual communication interface is: the first Ethernet interface; Described the first communication protocol is: NFS communication protocol.
3. method as claimed in claim 2, is characterized in that, the described first virtual communication interface of setting up in described the first electronic equipment by described first interface, is specially:
A USB driver upper strata in the first operating system of described the first electronic equipment, encapsulate the first ethernet driver, thereby in described the first operating system, set up based on described the first USB interface, and described first Ethernet interface corresponding with described the first ethernet driver;
Wherein, a described USB driver is driver corresponding to described the first USB interface; Described the first Ethernet interface is described the first virtual communication interface.
4. method as claimed in claim 3, is characterized in that, described the first communication protocol based on default, utilizes described the first virtual communication interface and described the second electronic equipment to carry out data communication, specifically comprises:
Obtain an IP address of described the first electronic equipment, and obtain the 2nd IP address of described the second electronic equipment;
Based on described NFS communication protocol, and a described IP address, described the 2nd IP address, between described the first Ethernet interface and the second Ethernet interface of described the second electronic equipment, set up Ethernet and connect, so that described the second electronic equipment can obtain described the first file by the 2nd NFS service routine that is arranged on described the second electronic equipment from described storage element.
5. method as claimed in claim 4, is characterized in that, described the second Ethernet interface, is specially:
By the 2nd USB driver upper strata in the second operating system of described the second electronic equipment, encapsulate the second ethernet driver, thereby in described the second operating system, foundation based on secondary USB interface, and the Ethernet interface corresponding with described the second ethernet driver;
Wherein, described secondary USB interface is the USB interface that described the second electronic equipment has; Described the 2nd USB driver is the driver that described secondary USB interface is corresponding.
6. method as claimed in claim 4, it is characterized in that, described between described first Ethernet interface and the second Ethernet interface of described the second electronic equipment of described the first electronic equipment, setting up Ethernet connects, so that described the second electronic equipment can obtain described the first file by the 2nd NFS service routine that is arranged on described the second electronic equipment from described storage element, specifically comprise:
Start the NFS service routine in described the first electronic equipment;
By a described NFS service routine, the operating right of the first file described in described memory cell is set for making described the second electronic equipment there is the authority of reading, so that described the second electronic equipment can, based on the described authority that reads, obtain described the first file by described the 2nd NFS service routine access.
7. an electronic equipment, described the first electronic equipment at least has a memory cell, stores the first file in described memory cell, it is characterized in that, and described electronic equipment comprises:
Set up unit, in the time that described the first electronic equipment is connected with described the second electronic equipment by first interface, in described the first electronic equipment, set up the first virtual communication interface by described first interface;
Communication unit, for the first communication protocol based on default, utilizes described the first virtual communication interface and described the second electronic equipment to carry out data communication, so that described the second electronic equipment obtains described the first file.
8. electronic equipment as claimed in claim 7, is characterized in that, described first interface is: the first USB interface of described the first electronic equipment; Described the first virtual communication interface is: the first Ethernet interface; Described the first communication protocol is: NFS communication protocol.
9. electronic equipment as claimed in claim 8, is characterized in that, the described unit of setting up, is specially:
Encapsulation subelement, a USB driver upper strata in the first operating system of described the first electronic equipment, encapsulate the first ethernet driver, thereby in described the first operating system, set up based on described the first USB interface, and described first Ethernet interface corresponding with described the first ethernet driver;
Wherein, a described USB driver is driver corresponding to described the first USB interface; Described the first Ethernet interface is described the first virtual communication interface.
10. electronic equipment as claimed in claim 9, is characterized in that, described communication unit, specifically comprises:
Obtain subelement, for obtaining an IP address of described the first electronic equipment, and obtain the 2nd IP address of described the second electronic equipment;
Set up subelement, be used for based on described NFS communication protocol, and a described IP address, described the 2nd IP address, between described the first Ethernet interface and the second Ethernet interface of described the second electronic equipment, set up Ethernet and connect, so that described the second electronic equipment can obtain described the first file by the 2nd NFS service routine that is arranged on described the second electronic equipment from described storage element.
11. electronic equipments as claimed in claim 10, is characterized in that, described the second Ethernet interface, is specially:
By the 2nd USB driver upper strata in the second operating system of described the second electronic equipment, encapsulate the second ethernet driver, thereby in described the second operating system, foundation based on secondary USB interface, and the Ethernet interface corresponding with described the second ethernet driver;
Wherein, described secondary USB interface is the USB interface that described the second electronic equipment has; Described the 2nd USB driver is the driver that described secondary USB interface is corresponding.
12. electronic equipments as claimed in claim 10, is characterized in that, the described subelement of setting up, specifically comprises:
Start module, for starting a NFS service routine of described the first electronic equipment;
Module is set, by a described NFS service routine, the operating right of the first file described in described memory cell is set for making described the second electronic equipment there is the authority of reading, so that described the second electronic equipment can, based on the described authority that reads, obtain described the first file by described the 2nd NFS service routine access.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107924546A (en) * | 2015-10-14 | 2018-04-17 | 三星电子株式会社 | For providing the method for content information and electronic equipment for this method |
| CN111800824A (en) * | 2020-05-28 | 2020-10-20 | 上海诺行信息技术有限公司 | Data transmission system of intelligent instrument, driving interface packaging device and method |
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| CN101459329A (en) * | 2007-12-13 | 2009-06-17 | 上海波汇通信科技有限公司 | Middle joint of high voltage electric cable for connecting composite optical fiber and connecting method |
| US20100085975A1 (en) * | 2008-10-07 | 2010-04-08 | Microsoft Corporation | Framework for optimizing and simplifying network communication in close proximity networks |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107924546A (en) * | 2015-10-14 | 2018-04-17 | 三星电子株式会社 | For providing the method for content information and electronic equipment for this method |
| CN107924546B (en) * | 2015-10-14 | 2022-03-08 | 三星电子株式会社 | Method for providing content information and electronic device for the same |
| CN111800824A (en) * | 2020-05-28 | 2020-10-20 | 上海诺行信息技术有限公司 | Data transmission system of intelligent instrument, driving interface packaging device and method |
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| CN103905487B (en) | 2017-09-29 |
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