KR100406524B1 - Apparatus and Method of Bridging for Stream Data Processing - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a bridging device for processing stream data, a method thereof and a computer-readable recording medium having recorded thereon a program for realizing the method.

2. The technical problem to be solved by the invention

The present invention transmits a stream between an ATM-related device connected to an external device and a device connected to a 1394 serial bus by using channel information and VPI / VCI, which is a stream processing connector of IEEE1394, in a gateway device configured with an ATM / HomePNA / IEEE1394 interface. It is possible to transfer external streaming data to an internal device, or to read a bridging device for processing stream data for delivering internal streaming data to the outside, and a method and a computer for recording the program for realizing the method. To provide a record medium.

3. Summary of Solution to Invention

The present invention relates to a bridging device for processing stream data between an external network and an internal network, wherein an asynchronous transmission mode (ATM) cell is transmitted through an asymmetric digital subscriber line (ADSL) physical layer under the control of bridging control means. ATM processing means for connecting an ATM interface having a segmentation and re-assembly (SAR) function through a Peripheral Component Interface (PCI) bus through a Utopia bus; Telephone line data connection processing means for receiving a packet of a telephone line data connection (HomePNA) physical layer transferred through a telephone line to form a media access control (MAC) packet frame under the control of the bridging control means and connecting the packet through a PCI bus; Standard interface processing means for configuring a standard physical layer and a link layer for processing standard interface data under the control of the bridging control means, and connecting them through a PCI bus; And store link information related to the ATM interface and the standard interface in a bridging mapping table, and manage them through an ATM manager and a bus manager, and refer to the bridging mapping table when transmitting packets between the external network and the internal network. And bridging control means for bridging the packet.

4. Important uses of the invention

The present invention is used in bridging devices and the like.

Description

Bridging device for stream data processing and its method {Apparatus and Method of Bridging for Stream Data Processing}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bridging device for processing stream data, a method thereof, and a computer readable recording medium having recorded thereon a program for realizing the method, in particular, Asynchronous Transfer Mode (ATM) / telephone line data connection. Virtual Path Identifier / Virtual Channel Identifier (VPI / VCI), which is a stream processing connector of ATM and IEEE1394, in a gateway device configured with a device (HomePNA: Home Phoneline Network Alliance) / IEEE1394 (Institute of Electrical and Electronics Engineers 1394) interface By using Virtual Channel Identifier) and channel information, streams can be transmitted between ATM-connected devices connected to the external device and devices connected by a 1394 serial bus to deliver external streaming data to internal devices, or internal streaming data to external devices. Bridging device for processing stream data for delivery and its A method and a computer readable recording medium having recorded thereon a program for realizing the method.

The asynchronous transmission mode (ATM) technology has a disadvantage in that the line speed of the terminal device is defined on the network side with a line structure of 64 kbps integer multiple of the line speed. However, the network has 5 bytes that designate a path to be transmitted without being aware of the type of the terminal. A transmission method that considers only 53-byte cell transmissions with a head of U.S. is a technology called ATM, and IEEE1394 enables high-speed transmission and real-time transmission, and freely connects devices connected to a communication bus, so that home appliances can be provided. It is a high-speed serial data bus technology with features that should be.

Therefore, ATM technology has been used as a technology for connecting a terminal to an external network with the development of ADSL technology using a telephone network, and IEEE1394 is used as a technology for connecting high-speed multimedia devices in a home.

However, the conventional method of transferring streaming data between an external network and an internal network is to transmit IP-based data using an ATM data transmission mode and transmit the data to the internal network and related devices. By using an address resolution technique that checks the address, there is a problem that the related operation must be performed at the IP layer, and thus, the original function of the interface cannot be used.

The present invention has been proposed to solve the above problems, and by bridging at the link layer to enable the stream data processing function, which is an original function of ATM and IEEE1394, not only does not pass the upper layer but also complicated It is an object of the present invention to provide a bridging device for transferring stream data between a high-speed ATM and IEEE1394, and a computer-readable recording medium having recorded thereon a program for realizing the method without going through a conversion process.

1 is a block diagram of an embodiment of a bridging device for processing stream data according to the present invention.

2 is an embodiment configuration diagram of an associated protocol stack to be loaded on a gateway of a bridging device according to the present invention.

3 is a flowchart of an embodiment of a bridging method for processing stream data according to the present invention;

4 is a flowchart illustrating a process of initializing a table when a device is connected or disconnected from a gateway device or a serial bus in a bridging method for processing stream data according to the present invention.

* Explanation of symbols for the main parts of the drawings

11 ATM processing unit 12 telephone line data connection processing unit

13: 1394 processor 14: memory

15: central processing unit

In order to achieve the above object, the present invention provides a bridging device for processing stream data between an external network and an internal network. The asynchronous transmission transmitted through an asymmetric digital subscriber line (ADSL) physical layer under the control of a bridging control means. ATM processing means for connecting an ATM interface having a segmentation and re-assembly (SAR) function through a Peripheral Component Interface (PCI) bus to disassemble and assemble a cell through an Utopia bus; Telephone line data connection processing means for receiving a packet of a telephone line data connection (HomePNA) physical layer transferred through a telephone line to form a media access control (MAC) packet frame under the control of the bridging control means and connecting the packet through a PCI bus; Standard interface processing means for configuring a standard physical layer and a link layer for processing standard interface data under the control of the bridging control means, and connecting them through a PCI bus; And store link information related to the ATM interface and the standard interface in a bridging mapping table, and manage them through an ATM manager and a bus manager, and refer to the bridging mapping table when transmitting packets between the external network and the internal network. And bridging control means for bridging the corresponding packet.

In addition, the present invention provides a bridging method applied to a bridging device for processing stream data between an external network and an internal network, wherein a gateway device having an asynchronous transmission mode (ATM) and a standard interface bridges stream data at a link layer. A first step of receiving the virtual path identifier / virtual channel identifier (VPI / VCI) and ATM cell type and bandwidth from the ATM manager to store in the bridging mapping table; If a cell is received through the ATM interface, examining a mapping with a related device in the bridging mapping table; According to the result of the second step, if there is no table entry, the cell is discarded. If there is a class 5 adaptation layer (AAL5: ATM Adaption Layer 5) according to the cell type, the cell is received and assembled to the end cell. A third step of doing; And a fourth step of converting the assembled cell or the cell received in the entry into a packet form and transmitting the packet to the bus manager of the standard interface through the link layer.

The present invention also provides a fifth step of initializing a device table through a bus reset when a device is connected to or disconnected from a gateway device or a serial bus; A sixth step of receiving the result from each device after the initialization and setting the bridging mapping table; A seventh step of, upon requesting connection establishment with a channel number and bandwidth to a device to which stream data is to be transmitted through the bus manager, receiving a configuration response transmitted by the corresponding device to readjust the bridging mapping table; And after performing the seventh step, in order to process the packet transmitted from the ATM interface, the standard interface converts the packet to the corresponding device by referring to the bridging mapping table and transmits the packet to the standard interface link layer when the packet is received. It further comprises an eighth step.

Meanwhile, the present invention provides a method for bridging stream data at a link layer by a gateway device having an asynchronous transmission mode (ATM) and a standard interface in a bridging device having a processor to process stream data between an external network and an internal network. A first function of receiving a virtual path identifier / virtual channel identifier (VPI / VCI) and ATM cell type and bandwidth information from the ATM manager to store in the bridging mapping table; A second function of checking a mapping with a related device in the bridging mapping table when a cell is received through the ATM interface; According to the result of the investigation of the second function, if there is no table entry, the cell is discarded, and if there is a class 5 adaptation layer (AAL5: ATM Adaption Layer 5) according to the type of the cell, the cell is received and assembled to the end indicating cell. A third function of doing; And a computer-readable recording medium having recorded thereon a program for realizing a fourth function of converting the assembled cell or the cell received in the entry into a packet form and transmitting it to a bus manager of a standard interface through a link layer.

The present invention also provides a fifth function for initializing a device table through a bus reset when a device is connected to or disconnected from a gateway device or a serial bus; A sixth function of receiving the result from each device and setting the bridging mapping table after performing the initialization; A seventh function of receiving a setup response transmitted from the corresponding device and re-adjusting the bridging mapping table when a connection setup request with a channel number and bandwidth is requested to a device to transmit stream data through the bus manager; And after the seventh function, the standard interface processes the packet transmitted from the ATM interface, converts the packet to the corresponding device by referring to the bridging mapping table and transmits the packet to the standard interface link layer when the packet is received. A computer readable recording medium having recorded thereon a program for further realizing the eighth function is provided.

The present invention uses a technique for bridging at the link layer to enable the stream data processing function, which is an original function of ATM and IEEE1394, and does not pass through a higher layer and does not go through a complicated conversion process. It can pass stream data of.

Accordingly, the present invention provides a method for processing stream data in a link layer, a table having ATM and 1394 link information stored in a memory of the processor unit, an ATM manager dedicated to setting and processing ATM related information, and 1394 link information. It is composed of a bus manager dedicated to setting and processing, and is operated by data transfer between them.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. 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 bridging device for processing stream data according to the present invention.

As shown in FIG. 1, a bridging device for stream data processing is a configuration diagram of an asynchronous transmission mode (ATM), a telephone line data access device (HomePNA), and a gateway device having an IEEE1394 interface, and includes an asymmetric digital subscriber line (ADSL). ATM to connect an ATM interface that passes through an Asymmetric Digital Subscriber Line (Physical Layer) through an Utopia bus to an ATM interface with a segmentation and re-assembly (SAR) capability through a Peripheral Component Interface (PCI) bus. The processing unit 11, the telephone line data connection processing unit 12 which receives the packets of the telephone line data connection physical layer transmitted through the telephone line, forms a media access control packet frame, and connects them through the PCI bus; and 1394 for processing IEEE 1394 data. 1394 processing unit 13 for configuring the physical layer and the 1394 link layer 131 for connection through a PCI bus, And a memory table (bridging mapping table) 14, a central processing unit (15) for the dedicated these processes for storing information associated with the interface.

Here, the ATM processing unit 11 including the disassembly and assembly unit 111 for assembling a cell using VPI / VCI maps the related information to the memory table 101 of the processor unit in a table form for use in a processing method. Save it. In addition, there is a 1394 link layer 103 which manages unique addresses and channel numbers of various devices connected on the 1394 serial bus, and related data information (called Configuration ROM) is similar to the VPI / VCI information. Is mapped to).

2 is a diagram illustrating an embodiment of an associated protocol stack to be loaded on a gateway of a bridging device according to the present invention.

As shown in FIG. 2, a protocol stack for software processing of each interface includes an ATM / HomePNA / IEEE1394 interface for each layer, an ATM link layer combined with an ATM adaptation layer, and a MAC (Medium Access) connected by a media independent interface. There is a 1394 link layer for isochronous data processing, including a link layer with a control line function and a transaction layer for processing asynchronous data.

In addition, higher protocols include an IP layer for processing Internet Protocol (IP) data, application protocols such as Transmission Control Protocol / User Datagram Protocol (TCP / UDP), and Routing Information Protocol (RIP) for managing routing information. do. Since ATM and IEEE1394 have different transmission schemes and addressing schemes, IP over Internet Protocol over Asynchronous Transfer Mode (ATM) and IP over1394 protocols are used for coordination.

That is, since the present invention is performed at the link layer, the memory of the processor unit as described above is provided by the ATM manager 201 for managing ATM related resources and the bus manager 202 for managing connections and devices connected on the 1394 serial bus. As shown in the following [Table 1], the bridging mapping table is managed to manage the setting and deletion.

3 is a flow chart of an embodiment of a bridging method for processing stream data according to the present invention, which illustrates a method for bridging stream data in a gateway having an ATM and a 1394 interface.

As shown in FIG. 3, VPI / VCI, ATM cell type, and bandwidth are received from an ATM manager (301) and stored in a table in memory (302).

Subsequently, when a cell is received through the ATM interface (303), first the mapping of the stored table to the associated device (304) is discarded if there is no table entry (305). In the case of the adaptation layer (AAL5: ATM Adaption Layer 5), the cell indicating the end is received and assembled (307). The assembled cell or cell received in the entry is sent over the 1394 link to send to the 1394 bus manager in the form of a packet (308).

4 is a flowchart illustrating a process of initializing a table when a device is connected or disconnected from a gateway device or a serial bus in a bridging method for processing stream data according to the present invention.

As shown in FIG. 4, when a device is connected to or disconnected from a gateway device or a serial bus, the device table is initialized through a bus reset, and the result is received from each device (401). Set (402). The bus manager requests connection establishment with a channel number and bandwidth to a device to transmit stream data (403), receives a configuration response transmitted by the corresponding device (404) and readjusts the memory table (405). From this point, the 1394 interface prepares to process the packet transmitted from the ATM interface (406). When the packet is received, the 1394 interface converts the packet to the corresponding device by referring to the memory table and transmits the packet to the 1394 link layer (407).

In the case of reverse transmission, the flow is transmitted in the same manner as described above, and only after the relevant information is established in the VPI / VCI table due to the nature of the 1394 interface (405), it is transmitted to the discard or ATM interface. .

The method of the present invention as described above may be implemented as a program and stored in a computer-readable recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.).

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

As described above, the present invention utilizes a device having an ATM interface and an IEEE 1394 interface, and utilizes a bridging mapping table (memory table) to process stream data at a link layer between a high-speed ATM and an IEEE 1394 device. It is possible to transfer data at high speed without passing through the complicated IP layer.

Claims (8)

In the bridging device for processing stream data between an external network and an internal network, Under the control of the bridging control means, an asynchronous transmission mode (ATM) cell delivered through an asymmetric digital subscriber line (ADSL) physical layer has a segmentation and re-assembly (SAR) function of disassembling and assembling the cell via a utopia bus. ATM processing means for connecting the ATM interface through a Peripheral Component Interface (PCI) bus; Telephone line data connection processing means for receiving a packet of a telephone line data connection (HomePNA) physical layer transferred through a telephone line to form a media access control (MAC) packet frame under the control of the bridging control means and connecting the packet through a PCI bus; Standard interface processing means for configuring a standard physical layer and a link layer for processing standard interface data under the control of the bridging control means, and connecting them through a PCI bus; And Link information related to the ATM interface and the standard interface is stored in a bridging mapping table and managed through an ATM manager and a bus manager, and the packet is referred to the link layer by referring to the bridging mapping table when a packet is transmitted between the external network and the internal network. The bridging control means for bridging a packet Bridging device for processing stream data comprising a. The method of claim 1, The ATM processing means, Including a disassembly assembly unit for assembling a cell by using a virtual path identifier / virtual channel identifier (VPI / VCI), the relevant information is mapped to the bridging mapping table of the bridging means and stored in a table form. The standard interface processing means, Map related data information (called Configuration ROM) to the bridging mapping table as VPI / VCI information including standard interface link layer that manages the unique address and channel number of various devices connected on the standard interface serial bus. Bridging device for stream data processing, characterized in that the. The method of claim 2, A protocol stack for software processing of each interface, Each layer has an asynchronous transmission mode (ATM) / telephone line data access device (HomePNA) / standard interface (IEEE1394). It has a standard interface link layer for isochronous data processing, including a link layer for a telephone line data connection device and a transaction layer for processing asynchronous data, and an IP layer and TCP for processing IP (Internet Protocol) data as a higher protocol. It includes application protocols such as Transmission Control Protocol / User Datagram Protocol (UDP) and Routing Information Protocol (RIP) that manages routing information. ATM and IEEE1394 differ in their transmission schemes and addressing schemes. Internet Protocol over Asynchronous Transfer Mode) and IP over 1394 protocol. And store and manage ATM related information about virtual path identifier (VPI), virtual channel identifier (VCI), type and bandwidth, and standard interface related information about identifier, channel number and bandwidth in the bridging mapping table. Bridging device for processing stream data. In a bridging method applied to a bridging device for processing stream data between an external network and an internal network, In order to bridge stream data at the link layer, a gateway device having an Asynchronous Transfer Mode (ATM) and a standard interface receives information about the virtual path identifier / virtual channel identifier (VPI / VCI) and ATM cell type and bandwidth from the ATM manager. A first step of receiving and storing the received data in a bridging mapping table; If a cell is received through the ATM interface, examining a mapping with a related device in the bridging mapping table; According to the result of the second step, if there is no table entry, the cell is discarded. If there is a class 5 adaptation layer (AAL5: ATM Adaption Layer 5) according to the cell type, the cell is received and assembled to the end cell. A third step of doing; And A fourth step of converting the assembled cell or the cell received in the entry into a packet form and transmitting the packet to the bus manager of the standard interface through a link layer; Bridging method for processing stream data comprising a. The method of claim 4, wherein A fifth step of initializing a device table through a bus reset when a device is connected to or disconnected from a gateway device or a serial bus; A sixth step of receiving the result from each device after the initialization and setting the bridging mapping table; A seventh step of, upon requesting connection establishment with a channel number and bandwidth to a device to which stream data is to be transmitted through the bus manager, receiving a configuration response transmitted by the corresponding device to readjust the bridging mapping table; And After the seventh step, in order to process the packet transmitted from the ATM interface, the standard interface converts the packet to the corresponding device by referring to the bridging mapping table and transmits the packet to the standard interface link layer when the packet is received. 8 steps Bridging method for processing stream data further comprising. The method according to claim 4 or 5, The bridging mapping table is, In a gateway device equipped with an asynchronous transmission mode (ATM) / telephone line data access device (HomePNA) / standard interface, a telephone line with a MAC (Medium Access Control) function connected to a media independent interface by combining the ATM adaptation layer It includes standard interface link layer for isochronous data processing, including link layer of data connection device and transaction layer for processing asynchronous data, and IP layer and TCP / UDP for processing IP (Internet Protocol) data with higher protocol. It includes application protocols such as Transmission Control Protocol / User Datagram Protocol (RIP) and Routing Information Protocol (RIP) that manages routing information. Virtual Path Identifier (VPI) as an alternative to over Asynchronous Transfer Mode and IP over 1394 protocol ), A virtual channel identifier (VCI), ATM-related information about the type and bandwidth, and standard interface-related information about the identifier, channel number and bandwidth are stored. In order to process the stream data between the external network and the internal network, to a bridging device having a processor, In order to bridge stream data at the link layer, a gateway device having an Asynchronous Transfer Mode (ATM) and a standard interface receives information about the virtual path identifier / virtual channel identifier (VPI / VCI) and ATM cell type and bandwidth from the ATM manager. A first function of receiving and storing in a bridging mapping table; A second function of checking a mapping with a related device in the bridging mapping table when a cell is received through the ATM interface; According to the result of the investigation of the second function, if there is no table entry, the cell is discarded, and if there is a class 5 adaptation layer (AAL5: ATM Adaption Layer 5) according to the type of the cell, the cell is received and assembled to the end indicating cell. A third function of doing; And A fourth function of converting the assembled cell or the cell received in the entry into a packet form and transmitting the packet to the bus manager of the standard interface through a link layer. A computer-readable recording medium having recorded thereon a program for realizing this. The method of claim 7, wherein A fifth function of initializing a device table through a bus reset when a device is connected to or disconnected from a gateway device or a serial bus; A sixth function of receiving the result from each device and setting the bridging mapping table after performing the initialization; A seventh function of receiving a setup response transmitted from the corresponding device and re-adjusting the bridging mapping table when a connection setup request with a channel number and bandwidth is requested to a device to transmit stream data through the bus manager; And After the seventh function, the standard interface is configured to process a packet transmitted from the ATM interface, and when the packet is received, converts the packet to the corresponding device by referring to the bridging mapping table and transmits the packet to the standard interface link layer. 8 function A computer-readable recording medium that records a program for further realization.