JPH0746287A - On-line system - Google Patents

Abstract

PURPOSE:To relieve the load of a network and a computer and to use effectively a communication network resource in the on-line system. CONSTITUTION:Each terminal equipment 11 is provided with a client program 15 and a requester program 17. A host computer 13 is provided with a terminal control task 19, a job program 21 and an on-line transaction program 37. The requester program 17 is connected logically to the terminal control program 19 via a session. An identifier managing the client program by a definite name is registered in advance, and the client program 15 specifies the identifier to send data to the terminal control program 19 via the requester program 17 and the logic session, the terminal control task 19 decides an identification code to send data to the client program via the session and the requester program 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an online system using a computer.

[0002]

2. Description of the Related Art When a client program on a terminal on a network is combined with an online system of a host computer, a client program is created by establishing a logical line (session) on a physical line connecting the terminal and the host computer. The online systems were connected one to one.

[0003]

However, in the conventional configuration, it is necessary to establish a logical line (session) every time the number of client programs increases, which increases the load on the network line and reduces communication efficiency. Occupies network resources.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to reduce the load on a network, a computer, etc. and effectively use communication network resources in an online system.

[0005]

In order to achieve the above object, an online system according to the present invention includes a network, a host system connected to the network for performing online processing, a terminal connected to the network, and a network system. And a means for establishing a session, which is a logical line connecting the host system and the terminal, and a means for establishing a plurality of logical sessions on one session.

[0006]

According to the above configuration, a plurality of logical sessions can be controlled on one session. Therefore, even if the number of client programs executed on the terminal and requesting data transmission increases, it is not necessary to increase the number of sessions, and the load on the network line and the computer can be reduced, and the load on the network and the computer can be reduced. Resources can be used effectively.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of an online network system according to an embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numerals 11 (11A and 11B) are terminals such as personal computers (PC) and workstations (WS), 13 is a host computer, 33 is a network connecting a plurality of terminals 11 and the host computer 13,
Indicates.

Each terminal 11 (11A, 11B) has a plurality of client programs 15 (15A-15D), requester programs 17 (17A, 17B), TCP / IP.
Communication interface face (T
CP / IP interface) 31 (31A, 31B).

Further, the host computer 13 has a terminal control task 19 (19A, 19B) and a business program 21 (21A).
21C), TCP / IP interface 35, logon management task, terminal control task management task, logout management task, and other online transaction programs (online transaction system, OLT).
P) 37.

The client program 15 transfers data to the host computer 13 via an association described later, and receives data processed online by the host computer 13.

Since the requester program 17 enables the terminal 11 to access the host computer 13,
Controls establishment / release of a logical line (session) and a logical session (association) and data transmission through the session.

The terminal control task 19 is generated by the OLTP 37 when the logon process is performed based on the request of the client program 15, and controls the data transmission between the terminal 11 and the host computer.

The business program 21 is an application program for executing a transaction. TCP /
The IP interfaces 31 and 35 are communication interfaces that satisfy the TCP / IP protocol, and are connected via the network 33.

The network 33 is a physical communication path composed of LAN, WAN, etc., and transmits data. The OLTP 37 is a system that processes generated data in real time, and is an application program on an OS (Operating System). OLTP
37 includes a plurality of terminal identifiers (I) for uniquely identifying the client program in the network system.
D) and various parameters associated therewith are registered in advance as shown in FIG. The address of the area in which each terminal ID and its associated parameters are stored becomes an association ID described later.

The data transmitted between the client program 15 and the terminal control task 19 of this online system has, for example, the packet format shown in FIG.

As shown in FIG. 2, the client program 15 and the terminal control task 19 are logically connected via an association 25 for transmitting data. Further, the requester program 17 is connected to the terminal control task 19 via the session 23. The session 23 is a logical line on the physical network 33, and the association 25 is a logical session on the session 23. A plurality of associations 25 can exist in one session 23 at the same time.

Next, the operation of the online system shown in FIGS. 1 to 4 will be described by taking the online processing of a request generated at the terminal 11A as an example. The terminal 11A and the host computer 1
During period 3, it is assumed that session 23 has not been established.

Client program 1 in terminal 11A
5, for example, when transmitting data requesting processing to the host computer 13, the 15A specifies the destination interface (TCP / IP interface 35) to establish the session 23 between the terminal 11A and the host computer 13. And sends a session establishment request (packet including a code indicating that the function code is a session establishment request) to the requester program 17A.

The requester program 17A checks the function code of the client program,
When the code indicating the session establishment request is detected, the packet is supplied as a logon request to the host computer 13 via the TCP / IP interface 31A and the network 33.

The host computer 13 fetches this logon request via the TCP / IP interface 35 and
Supply to LTP37. The logon management task in the OLTP 37 activates the terminal control task management task and newly generates the terminal control task 19 corresponding to this logon request. Assume that the newly created terminal control task is 19A.

The generated terminal control task 19A sends a session establishment request (packet including a code indicating that the function establishment request is a session establishment request) to TCP / IP.
Interface 35, network 33, TCP / IP
It is transmitted to the requester program 17 of the terminal 11A via the interface 31A. By the above operation, the session 23 between the terminal 11A and the host computer 13 is established.

Next, the client program 15A supplies an association establishment request (a packet including the fact that the function code is an association establishment request) to the requester program 17A in order to establish the association 25. At this time, the client program 15 is the address (destination address) of the business program 21.
And further specifies any of the terminal IDs registered in the OLTP 37 of the host computer 13, the user name, the password, etc., and includes them in the packet. The requester program 17A transmits an association start request to the terminal control program 19A via the session 23 (physically, an association start request is transmitted via the TCP / IP interface 31A, the network 33, and the TCP / IP interface 33, The host computer 13 submits this association start request to the terminal control program 19A.) The terminal control task 19A responds to the association start request and determines whether the security check or the specified terminal ID is available (the ID is Check whether other terminals are in use).

If the check result is "impossible", the terminal control task 19A notifies the requester program 17A of a negative response indicating non-permission. Requester Program 1
7A notifies the client program 15A of that fact. The negative response is composed of, for example, a packet including a status code indicating “impossible”. In this case, the client program 15A designates a new terminal ID, password, etc., as necessary, and the association 2
Request 5 establishment again.

On the other hand, if the check result is “OK”, the requester program 17 is notified of the positive response and the association ID corresponding to the designated terminal ID. The association ID is, as shown in FIG. 4, the corresponding terminal I
It is the start address of the area that stores D, etc., and the terminal ID
Is converted into an association ID, which facilitates access to parameters and the like. This positive response is composed of, for example, a packet including a status code indicating “permitted” and an association ID.

The requester program 17A checks the association ID in the received packet and supplies the packet transmitted from the host computer 13 to the client program 15A corresponding to the ID.

When the client program 15 receives the positive response, it specifies the association ID and sends a transaction message to the requester program 17A. The requester program 17A sends the supplied transaction message to the sender address (TCP / IP
Interface address), destination address, association ID, etc. are added and transmitted to the host computer 13. When the host computer 13 receives the packet, it checks the association ID and supplies the received packet to the terminal control task 19A corresponding to the association ID.

The terminal control task 19A inputs the data contained in the received packet into the business program 21, for example 21A, corresponding to the association ID. The business program 21A processes the corresponding data and supplies a response message to the terminal control task 19A. Terminal control task 19A
Packetizes the response message, adds an association ID, a destination address, a source address, etc. to each packet, and sends the packet to the requester program 17A of the terminal 11A. The requester program 17A checks the association ID and supplies the transaction data to the corresponding client program 15A.

Under the condition that the association is established between the client program 15A and the terminal control task 19A, for example, when the client program 15B needs to establish the association with the terminal control task 19A, the client program 15B , Requester program 17 to establish association
To A, the address of the business program 21, the terminal ID, etc. are specified and an association start request is issued.

Terminal control task 19A of the host computer 13
Responds to the association start request and checks the security check and whether or not the specified terminal ID is currently in use. If the check result is [disabled], the terminal control task 19A does not permit logon. To the requester program 17A. The requester program 17A notifies the client program 15 to that effect.

On the other hand, if the check result is “OK”, the requester program 17 obtains the affirmative response indicating the logon permission and the association ID corresponding to the designated terminal ID.
Notify A. The requester program 17A checks the association ID in the received packet and supplies the packet transmitted from the host computer 13 to the client program 15B corresponding to that ID.

When the client program 15B receives the positive response, the client program 15B specifies the association ID, the business program 21, etc., and sends a transaction message to the requester program 17A. Requester Program 17
A adds the source address, the destination address, the association ID, etc. to the supplied transaction message and sends it to the host computer 13. Host computer 13
When receiving the packet, supplies the received data to the terminal control task 19A corresponding to the association ID.

The terminal control task 19A inputs the received data into the designated business program 21. The business program 21 processes the transaction message and supplies a response message to the terminal control task 19A. The terminal control task 19A packetizes the response message, and the terminal 1
It is transmitted to the requester program 17A of 1A. The requester program 17A checks the association ID and supplies the transaction data to the corresponding client program 15.

As described above, a plurality of associations 25 can exist on one session 23 at the same time. When the client program 15A or 15B finishes transmitting / receiving data to / from the business program 21, the requester program 17 releases the corresponding association.
The association ID is specified in A and the release of the association 25 is requested. The requester program 17A sends this to the terminal control task 19A. The terminal control task 19A supplies the logoff request to the OLTP 37,
The TP 37 executes logoff processing. In the logoff process, OLTP37 is the specified association ID
The terminal ID corresponding to is set to the unused state.

The OLTP 37 sends an association release notice to the requester program 17 via the terminal control task 19B. In response to this, the requester program 17 sends the client program 15 to the OLTP 37.
Disconnect from.

As described above, according to this embodiment, a plurality of logical sessions (associations) can be handled on one session. The terminal 11A
While the session 23 is established between the host computer 13 and the host computer 13, it is possible to establish the session 23 between the other terminal 11 and the host computer 13 as in the conventional case.
It is possible that a plurality of sessions 23 exist simultaneously between one terminal 11 and the host computer 13.

[0036]

As described above, according to the present invention, it is possible to handle a plurality of logical sessions (associations) on one session, and it is necessary to increase the number of sessions even if the number of client programs increases. Therefore, it is possible to prevent an increase in load on the network line and a decrease in communication efficiency.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an online system according to an embodiment of the present invention.

FIG. 2 is a diagram showing a state in which a terminal and a host computer are connected by a session and an association in the online system of FIG.

FIG. 3 is a diagram showing a relationship between a terminal ID and an association ID.

FIG. 4 is a diagram showing a packet format.

[Explanation of symbols]

11 ... Terminal, 13 ... Host computer, 15 ... Client program, 17 ... Requester program, 19 ... Terminal control task, 21 ... Business program, 23 ... Session, 25 ... Association, 31 ... TCP / IP interface, 33 ... Network, 35 … TCP / IP
Interface, 37 ... Online transaction program (OSTP).

Claims (3)

[Claims] 1. An online system comprising a network, a host system connected to the network for performing online processing, and a terminal connected to the network, wherein the host system and the terminal are connected on the network. Means for establishing a session that is a logical line,
An online system comprising: means for establishing a plurality of logical sessions on one session, wherein a plurality of logical sessions can be controlled on one session. 2. In an online system including a host system that executes a business program and performs online processing, and a terminal that executes a client program, a session that is a logical line connecting the host system and the terminal is established. Means and an identification code for managing the client program with a unique name on this online system, and by specifying the identification code and transmitting and receiving data on the session between the client program and the host system, An online system characterized by being able to control multiple logical sessions on one session. 3. An online system comprising a host system for executing a business program and performing online processing, a terminal for executing a client program, and means for establishing a session which is a logical line between the host system and the terminal. In the above, an identification code for managing the client program with a unique name is provided on the online system, the identification code is specified, data is transmitted and received on the session between the client program and the host system, and the identification code is assigned. An online system characterized in that a plurality of associations can be formed in one session by using an identification code of an association which is a logical session.