JPS6229242A - Data communication method in PC network system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a data transfer method in a computer network system, and particularly to a data transfer method suitable when a single task type is used as an oil rating system.

[Background of the invention]

Conventional data transfer methods include Japanese Patent Application Laid-Open No. 59-148929.
There is one mentioned in the publication. This conventional example uses a method of dividing transmission data into general data and priority data and transmitting them.

When applying this idea to Yankon network,
Since the transmission data is not divided by destination, if the destination of data in the first transmission queue is Pino, the data of other destinations will also have to wait, leading to a deterioration in transfer efficiency. On the other hand, when a group of transmitted and received data is related to one business process, a control mechanism is required that recognizes that the received data corresponds to the transmitted data and restarts the corresponding business process. Therefore, the contents of transfer control become complicated.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a data transfer method in a Noya Computer Network 7 system that enables pseudo real-time processing by sharing averaging transfer and priority transmission/reception processing.

[Summary of the invention]

The present invention provides data communication between a plurality of plain computers via a single communication path. Targets computer network systems. In this Noxcon network system,
The possible opportunities for data transfer are equal between each computer.

It is rare that a difference in priority occurs between data sent to each personal computer.

Therefore, by managing the transmission data queue for each /4' controller, the data transfer order is averaged for each /4' controller.

On the other hand, in addition to this process, there is a high-priority process that transmits and receives a plurality of data between the 79 controllers and does not change the state until the process is completed. Only in this process, transmission data is directly transmitted without registering it in a queue, and the data is received by specifying the transmission source.

The above two data transfer methods can coexist and be used separately in business processing.

[Embodiments of the invention]

FIG. 1 is a diagram of a personal computer network system. 1
A plurality of ・9 controllers 41, 42 .
A network controller system 5 is configured by connecting 43 and 44. Each network controller 41
- 44 were connected to the computer 11-14 via interface control units 21-24.

/ and computers 11 to 14 have a built-in single-task operating system (rating system) that allows only one program to run at a time, and are managed by this system.Single-task operating systems include, for example, Microsoft There are the MS-DO8 from the company and the CP/M from the digital research company.

)9 personal computers 11 to 14 have a keyboard and a CRT in addition to a processor. Various inputs are performed from one key to the other, and displays are displayed on the CRT. Use as a man-machine interface.

The network controllers 41 to 44 have a speed conversion function to deal with the difference between the speed on the path 3 and the processing speed at the mother computers 11 to 14, and the speed on the path 3 and the transmission line 21.
A~24A), functions for network control, terminal interfaces 21~2
It has the following functions: 4 control functions, and a buffer function (having a buffer memory).

Furthermore, it has a path 3 exclusive function.

The interface control units 21 to 24 perform interface control such as a command function to select the number of transfer unit pits (selection of 8 bits, 7 bits, or 5 bits) and a command to select the number of synchronized pits. "R8232C control" (or J
This control is known as IS-C6361).

The control program built into each personal computer 11 to 14 is
It is shown in Fig. 4. Furthermore, each personal computer 11 to 14 has a transmission table 91 as shown in FIGS. 3(a) and 3(b).
, and has a reception buffer 92. The control program in FIG. 2 is for scanning processing, and the control program in FIG. 4 is for interrupt-activated communication control processing. The scanning processing program shown in FIG. 2 is a process for dealing with randomly generated key inputs (inputs from interfaces 11 to 14) and data sent from other nine computers transferred via the network 5. I do.

The contents of FIGS. 3(a) and 3(b) are located between the program of FIG. 2 and the program of FIG. 4 and play the role of data management and temporary storage. Therefore, the programs in FIG. 2 and FIG. 4 may be considered to be combined through the contents in FIGS. 3(a) and 3(b).

In FIG. 2, there are four business processes 61, 62, 63, and 64. The business process 61 is for average communication service, and the business process 62 is for conversational communication process, and the key is not human-powered, and the side activated depending on the instruction content of the key is either 61 or 62.
It is decided.

Business processing 63 corresponds to 61 and is for average communication service.
Business processing 64 corresponds to 62 and is for conversational communication processing. 63 or 64 is determined depending on the type of received data.

"rCRT display in business process 61 and 62" is a display for selecting the work content of business process, which displays a plurality of business processes and allows the worker to select one of them. The rCRT display of the business process 63 is used to confirm the processing results of the business process.

"Business process" in business process 61.62.63.64
refers to each business process itself, for example, processing such as updating a data table.

Now, the business processes 61 and 62 in Figure 2 are their own
Depends on the key power of the computer's terminal. For example, in the case of the personal computer 11, the business process 61 or 62 is instructed using the keys (particularly the function keys) of the own terminal. In the business process 61, the worker selects specific content from the contents of the "rCRT display", then specifies the content via the screen selection response key (numeric keypad), and displays the content on the computer 1.
1, performs the main processing, and issues a transmission request.

In the business process 62, the worker selects specific content from the content of the rCRT display, then specifies the content via the screen selection response key (numeric keypad) and inputs it into the computer 11, and further, Conversation communication processing 621 is performed, and the main business processing is performed. The details of this conversation communication process 621 are explained in the seventh section.
As shown in the figure.

Furthermore, in FIG. 2, the presence or absence of a transmission request is checked, and if there is a transmission request, the process moves to average transmission service processing 611 to perform average transmission service. This service process is the sixth
Details are shown in the figure. Next, the presence or absence of input of received data is checked, and if input is present, the type of received data is determined. As a result of this determination, if it is response work processing for an average transmission service, the process moves to 63, and if it is response work/processing for conversational communication, the process moves to 64.

In the business process 63, the main business process is performed, and then the CRT
Check the displayed content. In the business processing 64, the main body of the business is processed, and then data is transmitted.

On the other hand, the communication control processing program 8 in FIG. 4 is as follows. The communication control processing program 8 is activated by either a transmission/reception interrupt as a hard interrupt or an interrupt by a transmission macro instruction as a soft interrupt.

The connection control in the program 8 is such that the network controllers 41 to 44 mutually occupy the path 3 and enter into a connection relationship. For example, to connect personal computers 11 and 13, network controllers 41 and 43 occupy path 3. There are various ways to occupy this path 3. For example, if one side issues a "connect command" and the other side receives this and sends an "answer back", the occupation of path 3 is established.
There is a method such as sending "Unavailable".

Communication control in the program 8 performs actual communication control such as communication in units of packets.

The transmission mode control in the program 8 refers to various commands and control of the transmission mode in the interface control units 21 to 24.

The soft interrupt caused by the send macro command in the program 8 is performed by this send macro command when reading the send macro command in FIGS. 6 and 7.

Now, the average transmission service is shown in Figure 5 (a), (b),
As shown in (c), one transmission request is sent to each destination from the transmission request queue managed for each destination.
(St In First Out), take out the 6th
Data is transmitted according to the processing procedure shown in the figure. Conversation communication is the 7th
As shown in the figure, data is transferred to the fixed communication destination by first fixing the communication destination and then directly activating the communication control process 8 without intermediating the transmission request queue in FIG. 5(a). Do the following. Fixation of the communication destination is achieved by instructing the communication control processing 8 to perform conversational communication as the communication processing method, and by refusing connection for data transfer with any other than the specified communication destination during the conversational communication request.

The above control program 7 and the business process 61 that uses the average communication service. Business process 63 corresponding to it
, a business process 62 that uses conversational communication, and a business process 64 that responds thereto, and are installed and run on each of the personal computers 11 to 1417C. It is assumed that business processes 61 and 62 are activated in response to function keys Fl and F2.

Therefore, on the computer 11, press the function key F1.
When the control program activates the business process 61 in response to the press of , it registers the transmission request queues 212 to 214 to the respective groups 712 to 14 in the management area, as shown in FIG. Thereafter, the average transmission service process 611 is activated by the control program, and data is transmitted to the corresponding computer according to the processing procedure shown in FIG. Assuming that the previous destination of the average transmission service process was computer 12, this time the first request was to send request 2 to computer 13 of 9.
13 is processed and sends the corresponding data. The corresponding data is sequentially transferred to the personal computer 14 at the next start-up of the average transmission service process, and to the personal computer 12 at the next start-up. In each of the destination/transmission computers 12 to 14, the communication control processing section 8 receives the corresponding data, activates the corresponding business process 63 according to the control program, and passes the received data to the business process 63. The business process is completed by executing processes such as chisel update and CRT display based on this received data.

If the computer 11 sends a request 213 to the computer 13,
When transmitting the corresponding data, if data is being transferred between the personal computer 12 and the computer 13, the communication control processing section responds with the average transmission service processing heavy result with a return code. When the return code is received, the average transmission service process outputs the CRT, ends the process, and transfers control to the control program. Therefore, when the average service process is activated next time, data is transferred to the next destination, Guncon 14. Next, the transfer service is performed sequentially to the computer 12, and then again to the personal computer 13 whenever there is a request for transmission.

The business process 62 of the computer 11 that uses conversational communication is...
The process is completed by exchanging a plurality of data with the corresponding business process 64 of the computer 13. Now, by pressing the function key F2, the control program will start the business process 6.
2, the business process does not register the transmission request to the personal computer 13 in the management area, for example after 213 in FIG. Specify and directly control the communication control processing unit,
- Transfer the data to the corresponding business process 64 of the computer 13. Therefore, at this time, even if there is a transmission request, for example 213, in the management area of the transmission request to 9nco 713,
Data for business processing using conversational communication will be sent earlier than this data. /4 In the controller 11, the business process 62 waits for response data from the controller 13. At this time, since the conversation communication processing method is specified, the communication control processing section refuses connection control for data transfer with other than the personal computer 13, and therefore only data from the 79 computer 13 can be received. On the other hand, in Gusocon 13, No. 4
Upon receiving data from the business process 62 of the personal computer 11, the control program starts the corresponding business process 64. Since the business process 64 is a business that responds to the business process 62 that uses conversational communication, like the business process 62, it directly controls the communication control processing unit as shown in FIG. 2 without intermediating the average transmission service process.・9 Sends data to computer 11. This data is handed over to the data receiving process during the conversational communication process of the personal computer 11 that is waiting for reception, a series of processes is completed, and control is transferred to the control program of each personal computer.

According to this example! From computer 11 to other computer 1
When transferring data to 2 to 14, the data existing in the management area of the transmission request for each destination computer is sent one by one, so the transfer can be averaged for each destination/f computer. In addition, it has the effect of preventing deterioration of the transfer efficiency of the other computer due to the pinot state of one computer. Furthermore, business processing that completes the process by performing multiple data conversions is different from the communication method that uses the above-mentioned transmission request management area and transfers data on an average basis to each computer. By directly controlling the communication control processing unit in the computer, communication methods for sending and receiving data can coexist, and by using these two communication methods properly in each business process, only a series of data groups related to each other can be created. It is possible to easily construct a/'P computer network that realizes real-time processing in a single-task processing environment where it is possible to easily extract information.

Furthermore, this control program has a structure that allows business processing to be easily added in response to function keys and received data, so that the application system can be easily expanded.

〔Effect of the invention〕

According to the present invention, it is possible to average the frequency of data transfer to each computer in an internet network in which data is transferred between multiple computers via one communication path, and the averaging By coexisting with transfer and being able to extract a series of related multiple data without constructing special control means, the communication control method can be simplified, making it possible to use nine computers in a single-task processing environment. Therefore, pseudo real-time processing can be easily realized.

[Brief explanation of drawings]

Fig. 1 is an example diagram of a personal computer network system according to the present invention, and Fig. 2 is a diagram showing a control system according to the present invention! Flowchart of the program, Figure 3 (0) and (B) are diagrams showing the transmission table and reception buffer, and Figure 4 is the communication control process! 5 (a), (b), and (c) are explanatory diagrams of transmission request keys, Fig. 6 is a flowchart of average transmission service processing, Fig. 7 is a flowchart of conversation communication processing,
FIG. 8 is a diagram showing a specific example of a transmission request queue. 3...Path, 5...Network, 11-14...
・Nof computer, 21-24...interface%l
J? JIIIilS, 4x~44...Network controller.

Claims (1)

[Scope of Claims] In a personal computer network system comprising a plurality of personal computers, a network controller provided for each personal computer, and a single bus in which the network controllers are connected in parallel, For data communication, if it is only one way, the transmission request is registered as a transmission queue and one-way data communication is performed according to the order of the queue, and if it is bidirectional, the transmission request is registered in the transmission queue. without having to create
A data communication method in a computer network system that allows data communication to occur directly between compatible computers.