JPH0449453A - Communication control system - Google Patents

Abstract

PURPOSE:To share and unitarily control network resources such as files and printers by processing communication requests from application tasks by transferring application tasks and data among plural personal computers in the network. CONSTITUTION:Tasks for executing communication control are constituted of communication device drivers 3a to 3c for controlling communication boards, network control tasks 4a to 4c for controlling network address control data routes and communication protocol control tasks 5a to 5c for executing protocol control. Communication requests from application tasks 6a to 6c are respectively converted into station opening commands, station closing commands, transmitting commands, and receiving commands respectively having terminating station name addresses and self-station name addresses and data are transferred and processed among the application tasks 6a to 6c in the personal computers 1s to 1c in the network. Thus, the network can be shared and unitarily controlled.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a communication control method, and in particular to a communication device driver that controls communication between application tasks on different networks, network control of a network control task, and a communication protocol control task. and a communication control method for controlling data routes.

[Conventional technology]

Conventional communication control methods allow data transfer between application tasks only on the same network.

[Problem to be solved by the invention]

The conventional communication control method described above has the following drawbacks because it is not possible to transfer data between application tasks only on the same network.

1. Since data cannot be transferred between application tasks on personal computers connected via different networks, it is difficult to coexist and centrally manage network resources (files, printers, etc.).

2. Communication methods on personal computers connected to different networks differ from network to network and do not have the same visibility, so communication processing for application tasks varies from network to network and is very complicated.

[Means to solve the problem]

The communication control method of the present invention is a communication control method using a plurality of personal computers that includes a network system and a communication board connected to the network system. a communication device driver located in the third to fourth layers to control the communication board; a network control task located in the third to fourth layers to perform network control data route control;
A communication protocol control task located in layer 6 performs protocol control, and receives a communication request from an application task using an open station (hereinafter referred to as rOPENJ) command, which has a network address, a partner station name address, and an own station name address, and a close station command. (hereinafter referred to as rcLO8EJ) command, a send (hereinafter referred to as rSENDJ) command, and a receive (hereinafter referred to as rRE CVJ) command, respectively, and transfer data to an application task on a personal computer on the corresponding network.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 shows an example of operation when controlling communication between application tasks on a network different from the configuration of an embodiment of the present invention.

The tasks that perform communication control include communication device drivers 3a to 3c that control communication boards, network control tasks 4a to 4c that perform network address control data route control, and communication protocol control tasks 5a to 5C that perform protocol control. configured. When the application task 6a on the personal computer la issues an opening request, the communication protocol control task 5a converts it into an opening command (hereinafter referred to as 0PEN command) having a network address, partner station name address, and own station name address, and This 0PE to control task 4a
Notify N command. The network control task 4a performs station opening processing (hereinafter referred to as 0PEN processing), identifies its own network and other networks, identifies the partner station name address, and notifies the communication device driver 3a of a 0PEN command, and the communication device driver 7a communicates The 0PEN command is transferred to the personal computer 1b in the same network A via the board 2a. When the communication device driver 3b on the personal computer lb receives this 0PEN command, it notifies the network control task 4b, and the network control task 4b receives the 0PEN command.
After storing the partner station name address and own station name address and controlling the opening of communication as the N process, a 0PEN command is notified to the communication protocol control task 5b. The communication protocol control task 5b starts the application task, and after completion of the start, completes the 0PEN command processing as completion of communication between the applications.

Next, when the application task 6a on the personal computer la issues a transmission request, the communication protocol control task 5a inputs the network address, partner station name address, own station name address, buffer size, and user data buffer ('user data). The command is converted into the existing 5END command and notified to the network control task 4a. The network control task 4a performs data editing including network identification, partner station name address identification, and code conversion as 5END processing, and notifies the communication device driver 3a of the 5END command. 5E to the personal computer 1b on the same network A (own network)
Transfer the ND command.

When the communication device driver 3b on the personal computer 1b receives this command, it notifies the network control task 4b, and when the network control task 4b receives this command, it performs network identification, identification of the partner station name address, and code conversion as reception processing. It edits the received data, including the received data, and waits for the RECV command from the communication protocol control task 5b. Communication protocol control task 5
b waits for a reception request from the application task 6b, converts the reception request into a RECV command having a network address, partner station name address, own station name address, buffer size, and user data buffer, and then sends the network control task 4b to the RECV command. Notify the RECV command to. After receiving the RECV command, the network control task 4b transfers the received data to the application task 6b through the communication protocol control task 5b, and the reception request of the application task 6b is completed.

When the application task 6a on the personal computer 1a makes a reception request, the communication protocol control task 5a converts it into a RECV command having a network address, a partner station name address, a local station name address, a buffer size, and a user buffer, and sends the Notify the work control task 4b. At this time, personal computer 1
When the application task 6b on a makes a transmission request, the communication protocol control task 5b converts it into a 5END command having a network address, a partner station name address, a local station name address, a buffer size, and user data, and sends it to the network control task 4b. Notify. After the network control task 4b performs data editing including network identification, partner station name address identification, and code conversion as 5END processing, it notifies the communication device driver 3b of this 5END command, and sends the same network A to the communication device driver 3b via the communication board. Data is transferred to the communication board 2a on the personal computer 1a within the computer.

The communication device driver 3a notifies the received data (network address, partner station name address, buffer size, and user data) to the network control task 4a, and since the network control task 4a is accepting the RECV command, it performs network identification as a reception process. After editing the received data including identification of the partner station name address and code conversion, communication protocol control task 5
The received data is transferred to the application task 6a through a, and the reception request is completed.

Next, when the application task 6a issues a station closing request, the communication protocol control task 5a converts it into a CLO8E command having a network address, partner station name address, and own station name address, and notifies the network control task 4a of the command. The network control task 4a is cL
Network identification and station closing processing are performed as osE processing, and this CLO8 is sent to the communication device driver 3b on the personal computer 1a in the same network A (own network) through the communication device driver 3a.
Transfer the E command. The communication device driver 3b notifies the received CLO8E command to the network control task 4b, and the network control task 4b
After performing network identification and station closing processing as E processing, this CLO8E is sent to communication protocol control task 5b.
:1 command, and the communication protocol control task 5b requests the application task to disappear. When the application task receives this deletion request, it performs deletion after opening, and the CLosE command is completed.

When data is transferred from the application task 6a on the personal computer 1a to the application task on the personal computer in network B (other network), the application task 6a
When the communication protocol control task 5a issues an opening request requesting an application and data transfer on a personal computer in another network B, the communication protocol control task 5a sends a 0PEN that has a network address in network B, a partner station address, and a local station name address. It is converted into a command and notified to the network control task 4a. The network control task 4a performs 0PEN processing to identify its own network and other networks and identify the partner station name and address, and uses the communication device driver 3a to identify the communication device on the network control personal computer IC in network B (other network). Transfer the 0PEN command to the driver 30.

Personal computer for network control 1
When the communication device driver 30 on c receives this 0PEN command, it notifies the network control task 4c, and the network control task 4c performs 0PEN processing to identify its own network and other networks, and to distinguish between the partner station name address and the own station name address. After performing storage and opening control, the 0PEN command is transferred to the communication device driver on the target personal computer in network B through the communication device driver 30.

Similarly, application task 6a is connected to network B.
When transmitting data to an application task on a personal computer in (also network), the transmission request issued from the application task is sent by the communication protocol control task 5a to the network address in network B, the partner station name address, and the self-transmission request. It is converted into a 5END command having a station name address, buffer size, and code data, and is notified to the network control task 4a, which is used for network control in network B through the communication device driver.-Communication device driver 30 on Sonal computer LC will be forwarded to.

The communication device driver 30 notifies the received 5END command to the network control task 4c, and the network control task 4C performs network identification and identification of the partner station name address as a transmission process. Transfer the 5END command to the communication device driver on the target personal computer.

In this way, data is transferred to and from the application task on the personal computer in network B (another network) via the network control personal computer 1c.

FIG. 2 shows the operation when controlling communication between an application task on a personal computer in network A and an application task on a personal computer in network B in this embodiment.

A communication request issued from the application task 12a on the personal computer 7a in network A passes through the communication protocol control task 11a, the network control task 10a, the communication device driver 9a, and the communication board 8a in order, and Communication board 8c on personal computer 7c, communication device driver 9c, network control task 10c, communication protocol control task lie, application task 1
2c, and data transfer between the application task 12a on the personal computer 7a and the application task 12c on the personal computer A3 in the own net Soak A becomes possible. A communication request to another network B issued from the application task 12b on the personal computer 7b is sent to the communication protocol control task fib/network control task 10.
b. Communication board 14a on network control personal computer 13a connected to other network B through communication device driver 9b and communication board 8b in order.Communication device driver 15a.Network control task 18a.Communication device driver 1.
5d and the communication board 14b on the personal computer 13b in the network B via the communication board 14d.
The communication device driver 15b, network control task 18b, communication protocol control task 17b, and application task 18b are notified in this order. This enables data transfer between the application task 12b on the personal computer 7b in network A and the application task 18b on personal computer B1 in network B via the network control personal computer 13a.

FIG. 3 shows the operation when the application task of this embodiment controls communication between application tasks on its own network and on other networks.

When the application task 24a on the personal computer la in network A issues an opening request A to the application task on the personal computer 2 in network A, the communication protocol control task 23a sends the network address A, the partner station name address A2, and the own station. It is converted into a 0PEN command with external address A1, and is notified to the network control task 22a.The network control task 22a performs the 0PEN process to identify the network, identify the partner station name address, and request transfer to network A, and then sends the communication device driver to the 0PEN command. 0 to the personal computer 2a in network A through 21a.
Transfer PEN command. Further, when the application task 24a makes a transmission request to the personal computer 2a in network A, the communication protocol control task 23a sends the network address A and the partner station name address A.
2. Convert it to a 5END command having own station address A1, buffer size, and user data, and notify it to the network control task 22a, and the network control task 22a performs 5END processing on the network; ・Identification of the network identification and partner station name address; It identifies the open state, edits data including code conversion, requests transfer to network A, and transfers the 5END command/data to personal computer 2a in network A via communication device driver 21a.

Next, the application task 24a
When the communication protocol control task 23a sends an opening request B to the personal computer in the PC, the communication protocol control task 23a converts it into a 0PEN command having the network address B, the partner station name address B1, and the own station name address A1, and notifies the network control task 22a. Network control task is OP,
As EN processing, the network identification, identification of the partner station name address, and transfer request to network B are performed, and the process is sent to the communication device driver 21b on the network control personal computer 19b connected to network B via the communication device driver 21a. 0PE
Transfer N command.

Personal computer for network control 1
After receiving the 0PEN command, the communication device driver 21b on 9b notifies the network control task 22b, and the network control task 22b performs network identification management, partner station name address identification management, and personal computer 1 in network B as 0PEN processing. The 0PEN command is transferred to the personal computer 19a in network B through the communication device driver 21c.

FIG. 4 shows the structure of each command. The 0PEN command is composed of a network address (own network soak/other network), a partner station name address, and an own station name address. The CLO8E command is the network address (own net soak/other network),
It consists of the partner station name address and the own station name address.

The 5END command is composed of a network address (self net soak/other network), a partner station name address, an own station name address, a buffer size, and a user data buffer (user data). The RECV command is composed of a network address (self net soak/other network), a partner station name address, an own station name address, a buffer size, and a user data buffer (user data).

Figure 5 is based on the O8 ■ basic reference model (7 layers).
The configuration of each task is shown. The communication board is located on the first layer (physical layer), and the communication device driver is located on the second layer (data link layer). In addition, network control tasks are assigned to the third layer (network layer) and fourth layer (transport layer), communication protocol control tasks are assigned to the fifth layer (cerasciron layer) and sixth layer (presentation layer), and application tasks are assigned to the third layer (network layer) and fourth layer (transport layer). are located in the seventh layer (application layer).

〔Effect of the invention〕

As explained above, the present invention utilizes the OSI basic reference model (
A communication device driver that controls the communication board located on the second layer (7 layers), a network control task located on the third and fourth layers that performs network address control and data route control, and a network control task located on the fifth and sixth layers. Configure a communication protocol control task that performs protocol control, and send communication requests from application tasks to network addresses and
0PE with partner station name address and own station name address
This has the effect of easily realizing data transfer between application tasks on personal computers in the target network by converting the command into the N command, CLO8E command, 5END command, and RECV command.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of the configuration of an embodiment of the present invention and an operation example when controlling communication between application tasks on different networks. FIG. and network B
FIG. 3 is a block diagram showing an example of an operation when an application task of this embodiment controls communication between application tasks in its own network and another network. 4A to 4D are explanatory diagrams showing the structure of each command, and FIG. 5 is an explanatory diagram showing the structure of each task. la ~1c*7a ~7de13a ~13c*19
a/19b...Personal computer, 2a-2d
#h8a~8d114a~14d river communication board, 3a
~3c*9a ~9d* 15a ~15d...Communication device driver 4a~4c/10a~10d/l
ea~16c...Network control task, 5a~
5ce 11a ~11de 17a ~17C...
Communication protocol control tasks, 6a-6c, 12a-12
d.18a to 18c...Application tasks.

Claims (1)

[Claims] In a communication control method using a plurality of personal computers having a network system and a communication board connected to the network system, OSI
A communication device driver located in the second layer of the basic reference model (7 layers) to control the communication board, a network control task located in the third to fourth layers to perform network control data route control, and a fifth to sixth layer A communication protocol control task that is located in the layer and performs protocol control is configured, and communication requests from application tasks are sent to an open command, a close command, a send command, and a receive command that have a network address, a partner station name address, and a local station name address. A communication control method characterized by converting each command into a command and transferring the data to an application task on a personal computer on the corresponding network.