KR100632399B1 - UPnP-IEEE1394 device bridge and its method - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a bridge device and method for interworking a high speed serial device with a general purpose plug and play device.

2. The technical problem to be solved by the invention

The present invention converts and provides a system event occurring in an IEEE1394 device into an UPnP message so that a high-speed serial device that does not support Internet Protocol (IP), such as an IEEE1394 device, can interoperate with a Universal Plug and Play (UPnP) device. It is an object of the present invention to provide a bridge device and a method for interworking a high speed serial device with a universal plug and play device for abstracting and interworking an IEEE1394 device as a UPnP device.

3. Summary of the Solution of the Invention

A bridge device for interworking a high speed serial device with a general purpose plug and play device, comprising: IP communication processing means for communicating with the general purpose plug and play device; High speed serial protocol processing means for controlling the high speed serial device according to the high speed serial protocol; Interlocking means for converting and providing a system event occurring in a high speed serial device connected through a wired serial bus into a universal plug and play device message, and abstracting and interlocking the high speed serial device into a universal plug and play device; Receiving data from the universal plug and play device according to a request from the high speed serial device, transmitting the data to the high speed serial device, and receiving data from the high speed serial device according to a request from the universal plug and play device. Streaming means for transmitting to the general purpose plug and play device.

4. Important uses of the invention

The present invention is used in home network systems and the like.

Local Area Personal Area Wireless Network System, IEEE 1394, UPnP, Bridge, High Speed Serial Device, Internet Protocol (IP)

Description

Bridge device and method for interfacing high speed serial devices with general purpose plug and play devices {UPnP-IEEE1394 device bridge and its method}             

1 is a configuration diagram of an embodiment of a short-range personal area wireless network system to which the present invention is applied;

2 is a configuration diagram of an UPnP device in a short-range personal area wireless network system to which the present invention is applied;

3 is a configuration diagram of an embodiment of a bridge device for interworking wired serial data with an Internet protocol based network according to the present invention;

4 is a detailed configuration diagram of an interlocking unit of a bridge device for interfacing wired serial data to an internet protocol based network according to the present invention;

FIG. 5 is a diagram illustrating an embodiment of a process of supplying media data of an IEEE1394 device to a UPnP network using a bridge device for interworking wired serial data with an Internet protocol based network. Referring to FIG.

* Explanation of symbols on the main parts of the drawing

101: UPnP device 102: bridge device

103: IEEE1394 bus 104: IEEE1394 device

301: streaming unit 302: TCP / IP processing unit

303: Ethernet 304: UPnP protocol processing unit

305: interworking unit 306: IEEE1394 protocol processing unit

307: IEEE1394 device

The present invention relates to a bridge device and a method for interfacing wired serial data with a general purpose plug and play device, and more particularly to a high speed serial device that does not support the Internet Protocol (IP), such as an IEEE1394 device. Integrating high-speed serial devices with general purpose plug and play devices to convert and provide system events occurring in IEEE1394 devices into UPnP messages and to abstract and interwork IEEE1394 devices as UPnP devices so that they can be interoperable with play (UPnP) devices. A bridge device for and a method thereof.

In the following example, a bridge device for interworking an IEEE 1394 device with a UPnP network will be described as an example.

IEEE1394 is a home networking technology that has its own protocol for controlling AV equipment and transmitting AV data based on broadband media.The IEEE1394 device has AV (or multimedia) capability that provides high quality multimedia services. Equipment is mainstream.

However, with the development of home network technology, various home networking media including Ethernet and IEEE1394 have a structure that enables physical interworking around home gateways, set-top boxes, and home servers. Interoperability between protocols and middleware is essential for interoperability between devices connected to heterogeneous network media.

On the other hand, with the trend of miniaturization and portability of computer systems and peripheral devices, digitalization of information appliances has been rapidly progressing. In other words, not only notebooks, but also more compact information devices such as smartphones, personal digital assistants (PDAs) and wireless communication terminals, as well as home appliances such as audio, cameras, set-top boxes, refrigerators, TVs, etc. There is a need for a communication method for connecting and recognizing and controlling necessary devices anytime, anywhere by connecting (information devices and information home appliances) to a wired or wireless network, and various standard service discovery protocols have been proposed.

Among them, UPnP is a representative home network middleware supporting various AV services. "UPnP" is based on IP networking and uses protocols widely used on the Internet such as Transmission Control Protocol (TCP), User Datagram Protocol (UDP), Hyper Text Transper Protocol (HTTP), and eXtensible Marup Language (XML). The structure is defined. The purpose of "UPnP" is to create a seamless network between devices using various media in a home network, so that when each device is added or removed from the network, no user or administrator effort is required.

However, as mentioned above, since UPnP operates based on Transmission Control Protocol / Internet Protocol (TCP / IP), there is a problem in that it cannot support an IEEE1394 device that does not basically accept TCP / IP.

The present invention has been proposed to solve the above problems, and occurs in an IEEE1394 device such that a high speed serial device that does not support Internet Protocol (IP), such as an IEEE1394 device, can be interoperable in a Universal Plug and Play (UPnP) device. It is an object of the present invention to provide a bridge apparatus and method for interworking a high speed serial device with a general purpose plug and play device for converting and providing a system event to a UPnP message and abstracting and interworking an IEEE1394 device as a UPnP device.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. In addition, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

An apparatus of the present invention for achieving the above object comprises: a bridge apparatus for interworking a high speed serial device with a general purpose plug and play device, comprising: IP communication processing means for communicating with the general purpose plug and play device; High speed serial protocol processing means for controlling the high speed serial device according to the high speed serial protocol; Interlocking means for converting and providing a system event occurring in a high speed serial device connected through a wired serial bus into a universal plug and play device message, and abstracting and interlocking the high speed serial device into a universal plug and play device; Receiving data from the universal plug and play device according to a request from the high speed serial device, transmitting the data to the high speed serial device, receiving data from the high speed serial device according to a request from the universal plug and play device, and Streaming means for transmitting to a general purpose plug and play device.

In addition, the method of the present invention is a method for interworking a high speed serial device with a general purpose plug and play device, comprising: detecting a connection by transmitting an advertisement message notifying the connection of the high speed serial device to the general purpose plug and play device; An abstraction step of abstracting the high speed serial device in the form of a universal plug and play device; A first conversion step of converting and delivering a system event occurring in the high speed serial device into a universal plug and play device message; Converting and transmitting a control message from the universal plug and play device into a system event recognizable by a high speed serial device; A first transmission step of transmitting data received from the universal plug and play device to the high speed serial device using the abstracted universal plug and play device form in response to a request from the high speed serial device; And a second transmission step of transmitting data received from the high speed serial device to the universal plug and play device using the abstracted universal plug and play device form in response to a request from the universal plug and play device. It features.

The present invention provides a technique for providing an AV service by recognizing, controlling, and monitoring an IEEE1394 device, which must be included in order to support an AV service, in a UPnP device.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of an embodiment of a short-range personal area wireless network system to which the present invention is applied and shows a general structure of a home network in which a UPnP device 101 and an IEEE1394 device 104 are connected through Ethernet. .

Generally, "UPnP" is composed of a control point and a device. A control point requests and controls a service required by the device, and the device provides a service according to a request of the control point. to provide. At this time, the method of describing a service provided by "UPnP" is based on XML (eXtensible Markup Language), and includes not only model name and manufacturer information but also service operation, parameters, and variables.

In the present invention, a service refers to tasks provided by any node and that can be performed. Services can be categorized into two categories: application level and platform level. The former can provide services such as program, data, and storage, and the latter can be used for nodes, node groups, and pipes. Services such as data channels).

That is, as shown in FIG. 1, the short range personal area wireless network system to which the present invention is applied includes a UPnP device 101, a bridge device 102, and an IEEE1392 device 104.

The UPnP device 101 includes a UPnP middleware based on TCP / IP, and is generally connected through Ethernet or WLAN media 100.

The IEEE1394 device 104 is a digital home appliance such as a digital camcorder, an HDTV, a home theater, a personal computer (PC), or the like, having an IEEE1394 port. The IEEE1394 device 104 is connected to the bridge device 102 using the IEEE1394 bus 103. Connected.

The bridge device 102 is applied to connect the IEEE 1394 bus 103 with the UPnP network 100 based on TCP / IP, that is, to physically connect the IEEE 1394 bus 103 with Ethernet or WLAN. It provides a bridge function of Layer 2. 2 and 3 will be described in more detail the configuration of the UPnP device 104 and the bridge device 102.

2 is a block diagram of an embodiment of a UPnP device 101 in a short range personal area wireless network system to which the present invention is applied.

As shown in FIG. 2, the UPnP device 101 is divided into parts 201, 202, 203 and 204 for communication with another UPnP device or a control module and AV function parts 205 and 206 in the device. That is, there is a physical module 206 that performs device-specific AV function, and a device controller or driver 205 that executes a unique command in a device to control the device function. UPnP protocol stack 204 to provide functionality to the module, physical media such as TCP / IP 202 and Ethernet / WLAN 203 to support underlying communications, and streaming modules to support AV streaming ( 201).

3 is a diagram illustrating an embodiment of a bridge device for interfacing wired serial data to an internet protocol based network according to the present invention.

As shown in FIG. 3, the bridge device 102 for interworking wired serial data with an Internet protocol based network includes a UPnP communication processing unit 304 and an IEEE1394 device 307 for connecting with a UPnP network. IEEE1394 protocol processor 306 for controlling the interworking unit 400 for interworking an UPnP device connected via an UPnP network based on TCP / IP and an IEEE1394 device 307 connected through an IEEE1394 bus, and the IEEE1304 device. Receive and transmit AV data from the UPnP device to the IEEE1304 device 307 in response to a request from 307, and receive the AV data from the IEEE1304 device 307 in response to a request from the UPnP device. Streaming unit 301 for transmitting to. A detailed configuration of the linkage unit 400 will be described with reference to FIG. 4.

4 is a detailed configuration diagram of an interlocking unit of a bridge device for interfacing wired serial data to an internet protocol based network according to the present invention.

As shown in FIG. 4, the interlocking unit 400 of the bridge device according to the present invention includes a device control agent 411 including a 1394 device driver 410, a virtual device module 408, and a UPnP device driver 406. ), A device manager 403 for supporting the device control agent 411, and a media conversion server 409.

The device control agent 411 is generated for each device connected to the IEEE1394 bus. When an IEEE1394 device is plugged in to an IEEE1394 bus, a bus reset event occurs on the IEEE1394 bus. At this time, the generated bus reset event is also transmitted to the IEEE 1394 protocol processor 310 of the interworking unit 400.

Then, the device manager 403 detects a bus reset event through the IEEE1394 application program interface (API), and reads information of the newly connected device through communication with the IEEE1394 device. In addition, the device manager 403 analyzes the information of the connected IEEE1394 device and executes the device control agent 411 that can control the IEEE1394 device according to the result.

The device control agent 411 is a device description that converts an IEEE1394 device into a UPnP device, its interface 406, a service descriptor and its interface 407, and an IEEE1394 supplied by a device developer or basically provided by an operating system. Device driver 410 and virtual device module 408 therefor.

The virtual device module 408 checks the media type provided by the IEEE 1394 device and the type convertible from the media conversion server 409 and adds the UPnP descriptor. For example, if there is an IEEE1394 device that supplies only BMP type images, and there is a module capable of converting BMP to JPG in the media conversion server 409, the media types of the devices provided in the UPnP network are BMP and JPG.

Meanwhile, the device control agent 411 transmits a UPnP advertisement message notifying the connection of the IEEE 1394 device to the UPnP network as soon as it is generated by the control of the device manager 403. As a result, when the UPnP network transmits a message requesting control of the IEEE1394 device, the IEEE1394 device control message is transmitted to the UPnP device module 406 or the UPnP service module 407 via the UPnP protocol processing unit 401. .

The IEEE 1394 device control message transmitted to the UPnP device module 406 or the UPnP service module 407 is transmitted to the IEEE 1394 device through the IEEE 1394 driver 410 and the IEEE 1394 protocol processor 404 through the virtual device module 408. Is sent.

On the other hand, when the IEEE 1394 device wants to receive AV data provided through the UPnP network, the streaming module 402 having a web server function accesses the data using the URL provided through the UPnP service descriptor. Then, the acquired data is transmitted to the requesting side.

FIG. 5 is a diagram illustrating an embodiment of supplying media data of an IEEE1394 device to a UPnP network using a bridge device 102 for interworking wired serial data with an Internet protocol based network. Referring to FIG.

As a method of supplying media data of an IEEE1394 device to a UPnP network using the bridge device 102, data paths 501, 504, 506, and 507 via the media conversion server 503 according to the media types required by the IEEE1394 device and the UPnP device, and the like. Paths (508, 510, 5011). In the case of AV data supplied from an IEEE1394 device requiring media conversion, it is copied to the data memory through direct memory access (DMA) (506), and then converted into a media format that can be recognized by the UPnP device in the media conversion server (503). After being copied (504), it is transmitted to the UPnP device through the streaming module 500 according to the request of the UPnP device connected using the URL (501).

At this time, if media conversion is not required, after copying via direct memory access (DMA) (510), transmission by UPnP device request is performed (508).

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

As described above, the bridge apparatus according to the present invention converts and provides a system event occurring in a device that does not support Internet Protocol (IP), such as an IEEE1394 device, into a UPnP message, and abstracts the IEEE1394 device into a UPnP device, thereby providing high-speed serial There is an effect that can link the device with the general-purpose plug and play device.

Claims (9)

A bridge device for interfacing a high speed serial device with a general purpose plug and play device, IP communication processing means for communicating with a general purpose plug and play device; High speed serial protocol processing means for controlling the high speed serial device according to the high speed serial protocol;  Interlocking means for converting and providing a system event occurring in a high speed serial device connected through a wired serial bus into a universal plug and play device message, and abstracting and interlocking the high speed serial device into a universal plug and play device; And Receive and transmit data from the universal plug and play device to the high speed serial device in response to a request from the high speed serial device, and receive data from the high speed serial device in response to a request from the universal plug and play device. Streaming means for transmitting to plug and play devices Bridge device for interlocking a high speed serial device comprising a universal plug and play device. The method of claim 1, The high speed serial device, A bridge device for interworking a high speed serial device with a general purpose plug and play device, characterized in that the IEEE1394 device. The method of claim 2, The interlocking means, Detects a bus reset event that occurs when an IEEE1394 device is plugged in to an IEEE1394 bus, detects a bus reset event, transmits the same to the general-purpose plug-and-play device through the IP communication processing unit, and acquires information on the IEEE1394 device. Device management means for performing; Under the control of the device management means, converts an IEEE1394 device into the form of a general-purpose plug and play device to generate a device description and its interface, a service descriptor and its interface, and a UPnP advertisement message for notifying the connection of the IEEE1394 device. Conversion means for informing a connection by transmitting to a general-purpose plug and play device, and consequently, transmitting the IEEE 1394 device control message received through the UPnP processing means to the IEEE 1394 device; And The UPnP processing means for receiving and transmitting an IEEE1394 device control message from the universal plug and play device to the conversion means Bridge device for interlocking a high speed serial device comprising a universal plug and play device. The method of claim 3, wherein The interlocking means, Virtual device management means for checking the media convertible type in addition to the media type provided by the IEEE1394 device and adding it to the UPnP descriptor. The bridge apparatus for interlocking a high speed serial device with a general purpose plug and play device. The method according to any one of claims 2 to 4, The streaming means, It has a web server function and receives the data from the universal plug and play device and transmits the data to the IEEE1394 device as the IEEE 1394 device requests data existing in the universal plug and play device using a URL provided through a UPnP service descriptor. And, when the universal plug and play device requests data existing in the IEEE 1394 device using a URL provided through a UPnP service descriptor, receives the data from the IEEE 1394 device and transmits the data to the universal plug and play device. A bridge device for interfacing a high speed serial device with a general purpose plug and play device. In the method of interlocking a high speed serial device with a general-purpose plug and play device, A connection detection step of transmitting an advertisement message notifying the connection of the high speed serial device to the general-purpose plug and play device to notify the connection; An abstraction step of abstracting the high speed serial device in the form of a universal plug and play device; A first conversion step of converting and delivering a system event occurring in the high speed serial device into a universal plug and play device message; Converting and transmitting a control message from the universal plug and play device into a system event recognizable by a high speed serial device; A first transmission step of transmitting data received from the universal plug and play device to the high speed serial device using the abstracted universal plug and play device form in response to a request from the high speed serial device; And A second transmission step of transmitting data received from the high speed serial device to the universal plug and play device using the abstracted universal plug and play device form in response to a request from the universal plug and play device; How to interlock a high-speed serial device including a universal plug and play device. The method of claim 6, The high speed serial device, A method of interlocking a high-speed serial device with a general purpose plug and play device, characterized by an IEEE1394 device. The method according to claim 6 or 7, The connection detection step, Detects a bus reset event that occurs when an IEEE1394 device is plugged in to an IEEE1394 bus and transmits a UPnP advertisement message notifying the connection of the IEEE1394 device to the general-purpose plug and play device to notify the connection. How to link high speed serial devices with general purpose plug and play devices. The method of claim 8, The abstraction step, A high-speed serial device characterized by converting an IEEE1394 device into a general-purpose plug and play device, creating a device descriptor and its interface, a service descriptor, and an interface thereof to abstract the IEEE1394 device into a general-purpose plug and play device. How to work with universal plug and play devices.

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