JPH055414B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is applied to a method of connecting information processing devices through a communication network.

The present invention relates to a communication system for a local network in which devices controlled by a plurality of user programs written in a high-level language on a plurality of personal terminals connected by a local network can communicate messages with each other. .

〔overview〕

In a system in which control means controlled by a high-level language of a personal terminal communicate with each other via a local network, a sending registration means, a receiving registration means, and a network control means that can operate independently of each other are provided, and multiple Increases flexibility in accessing input/output peripherals by enabling communication with user terminals of
This makes it possible to effectively utilize the advantages of a distributed processing system.

[Conventional technology]

Conventionally, in devices controlled by user programs on a large number of personal terminals connected through a local network, message communication between the devices was configured as one task by a communication control processor.

Therefore, in this method, (1) the user program is the only user program on the network that can perform message communication; therefore, when changing the communication partner, the user It is necessary to close the program, select a new destination number, and open the station. It cannot be executed asynchronously with editing commands, input/output commands, etc., and the next command is executed only after the sending command and receiving command have finished. (3) The user program operates only as a primary job and cannot be used. There were operational and operational limitations, such as the inability to perform multi-job operations between user programs.

[Problem that the invention seeks to solve]

However, due to the above limitations, (1) a user program cannot communicate messages with multiple user programs at the same time;
Access methods to common databases and input/output peripheral devices are inflexible, and scalability as a distributed processing system is low. In addition, if the other party's user program goes down, there is a risk that the entire system will go down, and the reliability of the system is low. Because it cannot be executed, the system had drawbacks such as poor performance of the entire system even if message transfer on the local network was fast.

An object of the present invention is to solve the above-mentioned drawbacks by providing means for independently registering transmission and reception on each personal terminal, and means for asynchronously controlling them. The purpose of this invention is to improve the message communication function between user programs on terminals and to provide a local network communication method with increased scalability as a distributed processing system.

[Means for solving problems]

The present invention provides a system in which devices provided in each personal terminal connected by a local network and controlled by a user program written in a high-level language communicate with each other. A communication control processor comprising: a transmission registration means for controlling a message transmission request from the means; a reception registration means for controlling a message reception request from the control means; and a network control means for controlling message transfer on a local network. The transmission registration means, the reception registration means, and the network control means are each configured to be able to operate independently, and the transmission registration means and the reception registration means each have a queue for transmission commands and a reception command. The transmission command includes means for registering, and the transmission command is configured to set a destination number for communication for each transmission request, and the processor receives an editing command or an input/output command from the editing means from the control means by the user program. It is characterized in that it is activated by an asynchronous transmission command or reception command.

[Effect]

A queue can be registered in each of the transmission registration means and the reception registration means, and transmission commands and reception commands are executed in accordance with the registration order. Since the transmission registration means, the reception registration means, and the network control means are configured to operate independently of each other, transmission commands, reception commands, other editing commands, input/output commands, etc. from devices controlled by the user program, etc. can each be executed asynchronously, allowing multiple operations.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows that a transmission command and a reception command issued from a user program 4 on a personal terminal 21 are sent to a network control means 1 via a transmission registration means 2 and a reception registration means 3 in an embodiment of the present invention. Figure 2 shows a control flow diagram of passing instructions.

The characteristics of the present invention are as follows.

(1) A communication control processor 22 provided in a personal terminal 21 of a local network and controlling message communication, a transmission registration means 2 for controlling transmission requests from a user program 4 written in a high-level language, and a transmission registration means 2 for controlling reception requests. reception registration means 3 for controlling message transfer on the local network; and network control means 1-3 for controlling message transfer on the local network.
The transmission registration means 2 is operated independently according to transmission commands #1 to #3, and the reception registration means 3 is operated independently according to reception commands #1 to #3.

(2) The transmission registration means 2 and the reception registration means 3 are provided with a transmission registration queue 2a and a reception registration queue 3a for respectively registering transmission commands and reception commands from the user program 4.

(3) Provide a transmission command that allows you to set the destination number for each transmission request.

In FIG. 1, the first issued transmission command #1 is passed to the network control means 1 via the transmission registration means 2, and the message is sent to a user program not shown in the diagram at the specified destination number through the local network. Make a transfer. During this time, other issued instructions #2 and #3 are registered in the transmission registration queue 2a, and control is transferred to the next transmission instruction. Upon completion of the previously executed transmission command #1, commands #2 and #3 in the transmission registration queue 2a are sequentially executed. The same applies to the reception command, and the first reception command #1 is sent to the network control means 1 via the reception registration means 3, and waits for a message to be received from the other party. Receive commands issued after this are registered in the reception registration queue example 3a, and are moved to the next position after the above-mentioned receive command #1. As for the reception command being executed first, upon completion of #1, the commands in the reception registration waiting queue example 3a, that is, the commands #2 and #3 are sequentially executed. In addition, since the transmission registration means 2 and the reception registration means 3 operate independently, transmission commands, reception commands, and other editing/input/output commands from the user program 4 can be executed asynchronously, and transmission processing and reception can be performed simultaneously. processing and other editing/input/output processing.

FIG. 2 shows a control block diagram of the transmit and receive commands. The number of the party to whom the message is to be forwarded is set in the party number in the control block 5 of the transmission command. Furthermore, a sending data buffer address, a receiving data buffer address, a sending data length, and a receiving maximum data length are set in each control block, and the exchange of messages sent and received with the user program is controlled.

FIG. 3 shows the structure of the sending registration queue and the receiving registration queue. After the instruction being executed first is finished, the instruction with the control block at the forefront is executed next in a first-in, first-out manner, and the network control means Passed to 1.

Figure 4 is a structural diagram of the local network, with personal terminals 10, 11, 12, 1
User programs 10a, 11a, on 3, 14
12a, 13a, and 14a simultaneously communicate messages with a plurality of user programs on a local network.

The user program 10a on the personal terminal 10, which has a disk device and a printing device, communicates messages with the user program 11a via the communication control processor, collects, edits, and inputs/outputs messages, and at the same time performs other uses. Message communication can be performed with the user programs 12a, 13a, and 14a.

In this way, the communication control system consists of three independently operating means: a transmission registration means for controlling transmission commands, a reception registration means for controlling reception commands, and a network control means for controlling message transfer on the local network. By starting the processor according to a request for transmission/reception by a user program and simultaneously communicating messages with multiple user programs, access to a common database or input/output peripheral devices is easily achieved, and the processor can be used as a distributed processing system. Expandability can be increased. Furthermore, if a user program of a certain other party goes down, by making that user program go down alone, it is possible to avoid the system from going down as a whole, and the reliability of the system can be improved.

〔Effect of the invention〕

As explained above, the present invention provides a communication control processor consisting of three components: a transmission registration means, a reception registration means, and a network control means that control these, each of which operates independently in accordance with transmission and reception requests from a user program. By starting up the system and communicating messages with multiple user programs at the same time, it increases the flexibility of access methods to common databases and input/output peripheral devices, and has the effect of improving performance and scalability as a distributed processing system. be.

[Brief explanation of the drawing]

FIG. 1 is a control flow diagram of transmission and reception commands on a personal terminal according to an embodiment of the present invention.
FIG. 2 is a control block diagram of a transmit command and a receive command. FIG. 3 is a structural diagram of a sending registration queue and a receiving registration queue. Figure 4 is a local network configuration diagram. DESCRIPTION OF SYMBOLS 1... Network control means, 2... Transmission registration means, 2a... Transmission registration queue, 3... Receiving registration means, 3a... Receiving registration queue, 4, 10a
~14a... User program, 5... Control block for sending commands, 6... Control block for receiving commands, 7... First point,
8... End pointer, 9a, 9b, 9c... Control block, 10-14, 21... Personal terminal, 10b-14b, 22... Communication control processor.

Claims (1)

[Claims] 1. In a system in which devices provided in each personal terminal connected by a local network and controlled by a user program written in a high-level language communicate with each other, a transmission registration means for controlling a message transmission request from a control means based on a user program; a reception registration means for controlling a message reception request from the control means; and a network control means for controlling message transfer on a local network. The transmission registration means, the reception registration means, and the network control means are each configured to be able to operate independently, and the transmission registration means and the reception registration means each receive a transmission command and a reception command. The transmitting command includes a means for registering a queue for communication, and the transmitting command is configured to set a communication destination number for each transmitting request, and the processor receives an editing command or an input/output command from the control means by the user program. A communication system for a local network characterized in that it is activated by an asynchronous transmission command or reception command.