JPH0836536A - Data transmitting method of lan and lan board using the method - Google Patents

Abstract

PURPOSE:To speed up the transmission and reception of data by starting analyz ing the header part of the data in parallel to the input of the information data once the end of input of the header part of the data is detected. CONSTITUTION:When data are sent to the LAN board 3' of a server, the LAN board 3' inputs the data (packet). Namely, a LAN controller 16 starts inputting the data to the buffer of the server as they are and once a monitor part 21 confirms the input of the header part of the data ends, an interruption control circuit 22 outputs an interruption signal to the CPU of a personal computer through a personal computer bus 12. Then, a driver starts analyzing the header part of the data in parallel to the input of the information data paid of the data and outputs a confirmation signal to an NOS(network operation system) when it is confirmer that the data are data sent to the server. A driver to which a partial request signal for the data is outputted from the NOS transfers part of the information data part in the buffer to the NOS.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of transmitting data in a local area network (LAN) between computers and a LAN board mounted in an expansion slot of the computer to form a LAN.

[0002]

2. Description of the Related Art An example of a conventional LAN board configuration and transmission method will be described with reference to FIGS.

In FIG. 3, reference numeral 1 is a communication line (common bus).
A plurality of (four in the figure) personal computers (hereinafter abbreviated as personal computers) 2 are connected to the communication line 1.
LAN boards 3 attached to the respective expansion slots are connected. A server 2A in which one of the personal computers 2 is connected to a printer or a large capacity disk (not shown)
And the other three personal computers 2 are clients 2B.

The LAN board 3 is connected to the I / F port 11 conforming to the network shape, and the bus 12 of the personal computer 2 is provided with an address bus 13, a data bus 14, and a control bus 15. Connected through
The LAN controller (hardware) 16 has functions of accessing the communication line (common bus) 1, assembling packets, and performing data communication with other personal computers 2.

The personal computer 2 also stores a driver (software) for the LAN board 3. LA above
A data transmission method using the N board 3 and the driver will be described by taking a case of transmitting data from the client 2B to the server 2A as an example. Server 2A to client 2
The same applies when transmitting data to B. The data transmission method described below is called a bus master method.

As shown in FIG. 5, when the application software of the client 2B transmits data (D1 to D6) to the server 2A (the data is in the memory), the operating system (OS) of the client 2B and the network. Operation system (N
The OS) transmits the data D1 to the driver, and the driver transmits the data D1 to the LAN board 3 of the server 2A via the I / F port 11 and the communication line 1 by the LAN controller 16.

The LAN board 3 of the server 2A fetches this data D1 as shown in FIG. That is, LAN
The controller 16 fetches the data D1 input via the I / F port 11 as it is into the buffer of the server 2A,
When the loading is completed, an interrupt signal is output to the CPU of the server 2A via the personal computer bus 12. Then, the driver analyzes the header portion of the data D1 stored in the buffer, and when it confirms that the data has been transmitted to the server 2A, outputs the confirmation signal to the NOS and notifies the analysis result. The NOS outputs a partial data request signal to the driver, and the driver transfers a part of the information data portion of the buffer to the NOS. This operation is performed until all the data in the information data section is transferred to the NOS,
In NOS, the data D1 is stored in the memory of the server 2A, and the contents of this data D1 are executed later, for example, the printer is driven. When the data transfer to the NOS is completed, the reception signal r is transmitted from the driver to the LAN board 3 of the client 2B via the communication line 1.

LAN controller 16 of client 2B
When the reception signal r is input to the driver, the driver transfers the reception signal r to the NOS, and the NOS transmits the data D2 to the driver in response to the reception signal r.

The above procedure is repeated, and the data (D1 to D
6) are all transmitted to the server 2A and data (D1 to D)
The operation according to the content of 6) is executed.

[0010]

However, in the above-described conventional configuration and transmission method, since it takes time from the arrival of data in the server 2A to the end of storage and the output of the reception signal r, the client 2B has a problem. There is a problem that it takes time to transmit data from the server to the server 2A. On the contrary, there is also a problem that it takes time to transmit data from the server 2A to the client 2B and between the clients 2B.

The present invention solves the above problems,
An object of the present invention is to provide a LAN data transmission method and a LAN board that realize high-speed data transmission and reception.

[0012]

In order to solve the above problems, the LAN transmission method of the first invention is such that when data arrives,
When data acquisition is started and the end of the header of the data is detected, the analysis of the header is started in parallel with the acquisition of the information data part of the data.

The LAN board of the second invention is a LAN having an adapter function for a local area network.
A LAN board provided with a controller and attached to a computer, which has a monitor unit for detecting the end of capturing the header section of the data being captured by the LAN controller. An interrupt control circuit for outputting an interrupt signal to the CPU of the computer is provided.

[0014]

According to the method of the first aspect of the invention, when data arrives, data fetching is started, and when the end of fetching the header section of this data is detected, the header section of the data is fetched in parallel with the fetching of the information data section of the data. Analysis is started, and thus the processing time from the arrival of data to the end of storage and the output of a reception signal is shortened.

With the configuration of the second aspect of the invention, by adding the interrupt control circuit, the interrupt signal is output to the CPU of the computer when the header of the data has been fetched. Therefore, based on the interrupt signal, the header portion of the data can be analyzed in parallel with the fetching of the information data portion of the data.

[0016]

An embodiment of the present invention will be described below with reference to the drawings. The same components as those shown in FIGS. 3 to 6 of the conventional example are designated by the same reference numerals and the description thereof will be omitted.

FIG. 1 is a block diagram of a LAN board in one embodiment of the present invention. This LAN board 3'includes an address bus 13, a data bus 14, and a control bus 15.
The monitor unit 21 is connected to the LAN controller 16 and detects the end of the header section of the data being taken into the buffer of the personal computer 2 by the LAN controller 16. The personal computer bus 12 is detected by the monitor section 21 when the end of the header section is taken. An interrupt control circuit 22 for outputting an interrupt signal to the CPU of the personal computer 2 via the is added. Further, the interrupt control circuit 22 includes a conventional LAN controller 16
The interrupt control circuit 22 outputs the interrupt signal as it is to the CPU of the personal computer 2 through the personal computer bus 12.

The personal computer 2 also stores a driver (software) for the LAN board 3 '. The LAN board 3'includes 10BASE5 system, 10B
I / F ports 23 to 25 compatible with the ASE2 system and the 10BASE-T system are provided, and lamps 26 to 29 indicating the four states of collision, link, transmission, and reception are provided, respectively. 23 to 25 and status display lamps 26 to 29 are connected to the LAN controller 16. The lighting status of the lamps 26 to 29 driven by the LAN controller 16 enables confirmation of the network status and communication status. Also, each I / F port 23-
The LAN controller 16 is automatically selected by the LAN controller 16, and the changeover switch is eliminated to eliminate trouble factors during installation.

A data transmission method using the LAN board 3'and the driver will be described by taking an example of transmitting data from the client 2B to the server 2A. Server 2
The same applies when data is transmitted from A to the client 2B.

Similar to the conventional example, when the data D1 is transmitted to the LAN board 3'of the server 2A via the communication line 1, the LAN board 3'of the server 2A, as shown in FIG. Capture (packet).

That is, the LAN controller 16 starts fetching (inputting) the arrived data D1 into the buffer of the server 2A as it is, and the monitor section 21 starts the data D1.
If it is confirmed that the header of the data D1 has been captured during the capture of the data, the interrupt control circuit 22
An interrupt signal is output to the CPU of the personal computer 2 via 12.

Then, the driver starts the analysis of the header portion of the data in parallel with the fetching of the information data portion of the data D1, and when it confirms that the data has been transmitted to the server 2A, the confirmation signal is sent to the NOS. Is output and the analysis result is notified. The NOS outputs a partial data request signal to the driver, and the driver transfers a part of the information data portion of the buffer to the NOS. This operation is performed until the data in all the information data sections are transferred to the NOS, the data D1 is stored in the memory in the NOS, and the contents of the data D1 are executed later, for example, the printer is driven. N
When the OS finishes executing the data, the reception signal r is sent from the driver via the communication line 1 to the L level of the client 2B.
It is transmitted to the AN board 3.

The procedure after this is the same as that of the conventional example, and the description is omitted. In this way, by adding the interrupt control circuit 22 to the LAN board 3 ', when the data header portion has been taken in, an interrupt signal is output to the CPU of the personal computer 2 and the driver parallelly takes in the data information data portion. Then, the data analysis is started, and the storage end and reception signal r
It is possible to shorten the processing time up to the output of and to speed up data transmission and reception.

Since the data flowing through the communication line 1 is the same as the conventional one, it is not necessary to pair the server 2A and the client 2B, and the personal computer 2 equipped with the LAN board 3'and the driver of the present invention is connected to the conventional communication line 1. Can be connected to and can be mixed.

[0025]

As described above, according to the present invention, when the data arrives, the data fetching is started, and when the end of the header portion of the data is detected, the fetching of the data is performed in parallel with the data fetching of the information data portion. By starting the analysis of the header section, the processing time from the arrival of data to the end of storage and the output of a reception signal can be shortened,
It is possible to speed up data transmission and reception.

According to the second aspect of the invention, since the interrupt control circuit is added, when the data header portion has been fetched, an interrupt signal is output to the CPU of the computer.
The data header part can be analyzed in parallel with the data information part capture, so the processing time from the arrival of data to the end of storage and the output of a reception signal can be shortened, and data transmission and reception can be performed. It is possible to realize high speed.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a LAN board according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a data transmission method using the LAN board.

FIG. 3 is a configuration diagram of a system using a LAN board.

FIG. 4 is a configuration diagram of a conventional LAN board.

FIG. 5 is an explanatory diagram of a data transmission method using a conventional LAN board.

FIG. 6 is an explanatory diagram of a data transmission method using a conventional LAN board.

[Explanation of symbols]

 1 Communication line (common bus) 2 Personal computer (personal computer) 3'LAN board 12 Personal computer bus 13 Address bus 14 Data bus 15 Control bus 16 LAN controller 21 Monitor section 22 Interrupt control circuit 23-25 I / F port 26- 29 Status indicator

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoichi Fujimori 3-931 Himesato Nishiyodogawa-ku, Osaka City, Osaka Prefecture Contec Co., Ltd. (72) Teruo Fujimoto Inventor Teruo Fujimoto 3-931 Himesato, Nishiyodogawa-ku, Osaka Issue within Contec Co., Ltd.

Claims (2)

[Claims] 1. A data transmission method in a local area network, wherein when data arrives, data acquisition is started, and when the end of the header part of this data is detected, the information data part of the data is acquired. A data transmission method, characterized in that the analysis of the header portion is started in parallel. 2. A LAN board provided with a LAN controller having a local area network adapter function and attached to a computer, wherein the monitor section detects the end of capturing the header section of the data being captured by the LAN controller. A LAN board having an interrupt control circuit for outputting an interrupt signal to the CPU of the computer upon detection of the end of capturing the header section by the monitor section.