KR970002823B1 - Atm lan adaptor - Google Patents

Abstract

A LAN connection apparatus using the asynchronous transmission method where supportes the 100/140Mbps data transmission rate, and operates in the operating system like the DOS and Windows NT, and in the EISA system bus that is the host bus system. The said apparatus consists of a host bus control means, data processing means, a data storing means, a data dividing/re-connecting means, a transmission/receiving processing means where generates the data of the asynchronous transmission method, an encoding/decoding means and a fiber transmission/receiving means.

Description

Local area network access device using asynchronous transmission method

1 is a schematic block diagram of hardware according to the present invention.

2 is a detailed configuration diagram of FIG.

3 is a flowchart illustrating the operation of the connection apparatus according to the present invention.

Figure 4 is a flow chart of the operation upon reception of the connection device according to the invention.

* Explanation of symbols for main parts of the drawings

10: host bus interface controller 20: packet storage

30: central processor and code mounting 40: performance code storage

50: external I / O controller 60: data segmentation and recombiner

70: transmit / receive processing and storage 80: cell encoding / decoding

90: optical transmitter / receiver

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a local area network formation method, and more particularly, to a local area network access device using an asynchronous transmission method for connecting an ELSA PC to an asynchronous transmission method local area network, which has recently attracted great interest.

In general, a local area network using an asynchronous transmission method has a terminal device such as a general PC or a workstation and provides various services to the terminal devices, as well as matching with the broadband integrated information network (ISDN). It is configured to accommodate the services provided by the broadband integrated information communication network.

A local area network access device according to an asynchronous transmission method for performing the above functions is basically divided into an asynchronous transmission method adaptation layer, an asynchronous transmission method layer, and a physical layer to perform the function. The access device must be able to faithfully transmit traffic generated by an application executed in a system connected to an asynchronous transmission type local area network to a network, and to receive traffic generated in the network according to a situation. Support should be provided.

In addition, by providing a high-speed link interface to support the user to be provided with the service at high speed.

On the other hand, in order to efficiently support such high-speed transmission, it may be said that a host system uses a high-speed system bus that enables high-speed data transmission in the system.

However, in the prior art, there is no connection device that supports the EISA bus, which is a high-speed system bus, or can be used in an asynchronous transmission local area network having a high-speed link interface function of 100 Mbps or more at the same time as operating in DOS and Windows NT operating systems. .

An object of the present invention for solving the conventional problems as described above is to support a data rate of l00 / 140Mbps, operating in DOS and Window NT operating system, local area network access device using a non-equivalent transmission method operating on the EISA system bus To provide.

A feature of the present invention for achieving the above object is a matching device between a broadband integrated information network and a network using a host bus for communication of host application data operating under a DOS / Windows NT operating system, wherein the host application data is a host bus. A host bus control means for performing the control required when the host system is burst transported, a processing means used for processing information from the host bus control means, and an execution code for instructing various requirements for system operation. Storage means for storing data matched for data transmission and reception with the broadband comprehensive information communication network, segmentation / recombination means for segmenting / recombining the data processed by the execution code in the storage means; Sending to the Information Network In order to add the information required for transmission to the broadband integrated information network to the data stored in the storage means for transmitting and receiving processing means for forming the data of the asynchronous transmission method, and the information generated from the transmission and reception processing means Encoding / decoding means for encoding / decoding, and optical transmission / reception means for converting an optical signal from an electrical signal generated from the encoding / decoding means.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a schematic block diagram of an asynchronous transmission type local area network access device according to the present invention. As shown in the drawing, a host bus interface controller controls an EISA system bus, which is a host bus, to exchange data between a host and an access device. 10, a packet store 20 for storing the packet information received from the host bus interface controller 10, and basic processing required for data stored in the packet store 20. Central processor and code mounting device 30, performing code storage unit 40 for always storing the code required for the central processor and code mounting device (30) regardless of the power, and information necessary to provide information and control to the external terminal Segmenting or networking the information performed by the external I / O controller 50, the central processor and the code mounter 30, which are stored for a while. Data segment / recombination unit 60 for combining the cells received from the network into the original information form, and information necessary for final cell formation such as HEC is added to cell information generated from the data segment / recombination unit 60. Then, the transmit / receive processing and storage 70 for forming a cell of an asynchronous transmission method, and the signal generated from the transmission / reception processing and storage 70 are encoded or decoded for a cell received from the network. It consists of an electrical signal encoder / decoder 80 which performs the operation and an optical transmitter / receiver 90 which converts the encoded information into an optical signal or provides the optical signal received from the network as an electrical signal to the transceiver. .

Referring to FIG. 2 attached to the detailed configuration of the above configuration, as shown in the figure, data traffic generated from the host system is received through the EISA bus system to the access device or transmitted from the network. Bus Mater Interface Controller (BMIC) 10, a packet storage device used to store data received by the Host Bus Interface Controller 10 and as a waiting place for performing necessary processing. (Information Buffer: High Speed SRAM) 20, a high speed central processor (i960CA) 31 for processing data stored in the packet storage 20, and execution code to be executed by the central processor 31. Execution code storage (EPROM) 40, external input / output controller (Z85C30) 51 for controlling the internal operation of the connecting device, temporary information related to the status of the connecting device Data to be executed by the central processing unit (31), the local memory (high speed SRAM) 32 in which the CSR 52, the code to be executed by the central processor 31, and the code to be executed are mounted. A data splitter 61 for primary segmentation to form a cell, a cell recombiner 62 for recombining cell information received from a network, and storing the data in a packet store; a cell divided from the data splitter 61 Transmitting FIFO 71 for storing information once, Receiving FIFO 72 for temporarily storing information to be sent from the network to the cell recombiner 62, HEC, etc. required for cell information received from the FIFO 71 A cell transmitter (73) for adding information to form a final asynchronous transmission cell, a cell receiver (74) for validating a cell received from a network, removing the HEC added during transmission, and then storing the received FIFO; Send cell A 4B / 5B encoder (Am79168) 81 for converting the final cell formed from the network into a serial bitstream for transmission to the network, and converts the shell of the serial bitstream received from the network into a parallel bitstream, thereby receiving the cell receiver 74. 4B / 5B decoder (Am79169) 82 for transmitting to the optical signal, and an optical / electric converter for transmitting the electrical signal of the serial stream generated from the encoder as an optical signal, and converting the optical signal received from the network into an electrical signal ( ODL) 90.

Referring to the accompanying drawings, a preferred operation example of a local area network access apparatus (hereinafter, described with reference to FIG. 2) using the asynchronous transmission method according to the present invention configured as described above will be described in detail as follows.

3 is a diagram illustrating the operation of the asynchronous transmission method local area network access device, and shows a flow chart during transmission.

3 is a diagram illustrating the operation of the asynchronous transmission method local area network access device, and shows a flow chart during transmission.

If power is supplied to the host system in step S31, the flow advances to step S32. The code to be executed by the central processing unit 31 from the EPROM 40 in the connecting apparatus is mounted in the local code mounting apparatus 32.

Subsequently, the flow advances to step S33 to determine whether a transfer request has been generated by the transfer related application of the host, and if the transfer request has been generated, proceeds to step S34.

In the stem S34, a transfer request is made to an interface register called a mailbox in the host bus interface controller 10 located in the connection apparatus.

At this time, when the transfer request is completed, in step S35, the data to be transmitted is stored in the packet storage 20 where the host data is stored by direct memory access (DMA) in the host bus interface controller 10. The data stored in the packet store 20 is first segmented and stored in the transmission FIFO 71 in order to be converted into an asynchronous transmission cell in the system S36.

Thereafter, in step S37, if it is determined that the information is stored in the transmission FIFO 7l, and it is determined that the information is stored, the flow advances to the stem S38 and information necessary for transmission of HEC, etc. to the cell information stored in the transmission FIFO 7l. Finally, cell information of the asynchronous transmission method is added, and in step S39, the cell information formed in step S38 is encoded, converted into an optical signal, and transmitted to the optical data link.

Therefore, a data transfer rate of 100/140 Mpps is possible.

Hereinafter, the operation flow at the time of reception corresponding to the operation flow at the transmission with reference to FIG. 3 will be described with reference to FIG. 4.

When a cell is received from the network in the form of an optical signal (S41), the cell is converted into an electrical signal and subjected to a decoding process (S42). After checking whether the decoded cell has an error (S43), if an error occurs, the cell is discarded (S44). If the normal cell is operated, the cell is stored in the reception FIFO 72 and then cell recombination is performed (S45). . The recombined cell is stored in the packet store 20 (S46), and generates an interrupt to the host in order to transmit this data to the host. On the host side, when the interrupt occurs, the host side confirms whether it is ready to receive (S47), and when ready, transmits to the host using the host bus interface controller 10 (S49).

By providing a local area network access apparatus using the asynchronous transmission method according to the present invention operating as described above, the main functions of the asynchronous transmission method are all composed of hardware, the structure is simple, and by using a high-speed device, a high speed network connection function Can be performed.

Claims (2)

A matching device between a broadband integrated information network and a network using a host bus for communication of host application data operating under a DOS / Windows NT operating system, the control device performing necessary control when the host application data is transported to a host system bus that is a host bus. Host bus control means; Processing means used for processing information from the host bus control means; Storage means for storing an execution code capable of instructing various requirements for operating the system and storing data that is matched for data transmission and reception with the communication network; Segment / recombination means for segmenting / recombining the data processed by the execution code in the storage means, and data stored in the storage means for transmission to the broadband integrated information network for transmission to the broadband integrated information network. Transmitting / receiving processing means for forming asynchronous transmission data after adding information; Encoding / decoding means for encoding / decoding information generated from the transmission / reception processing means; And optical transmission / reception means for converting an electrical signal generated from the encoding / decoding means into an optical signal. 2. The apparatus of claim 1, wherein said storage means comprises: a first storage portion for storing data of a host from said host bus control means; A second storage unit on which a performing code to be processed is mounted; A third storage unit which always stores the execution code basically regardless of the power supply to provide a code to the second storage means; And a fourth storage unit for storing the cell information processed from the segmentation / recombination means.