JPH0484248A - Pre-communication processor - Google Patents

Abstract

PURPOSE:To set optimum communication speed corresponding to a work content by establishing plural logical channels on one physical line and controlling the multiplicity of a session established in the channel in an equipment controlling communication between computer systems. CONSTITUTION:A data precedence control means 12 sets a precedence parameter by an instruction from an application program 11 and gives the request of the establishment of the session to a pre-communication processor 2. The precedence parameter designates how much occupancy ratio the session has in the logical channel. A logical channel control means 21 analyzes the precedence parameter of the request for the establishment of the session from a host computer system 1. When the logical channel satisfying the precedence parameter exists as the result of the retrieval of a session multiplex control means 24, a session establishment means 23 establishes the session on the logical channel. When such logical channel does not exist, a logical channel establishment means 22 establishes the new logical channel with an opposite computer system 3 and the session establishment means 23 establishes the session on the logical channel.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is utilized as a communication means between computer systems. In particular, it relates to data transmission priority control means.

〔overview〕

The present invention, in a device that controls communication between computer systems, establishes multiple logical communication paths on one physical line and controls the multiplicity of sessions established within this logical communication path. This allows you to set the optimal communication speed according to your needs.

[Conventional technology]

Conventionally, in communication between computer systems, a plurality of logical communication paths have been established on one physical line, and the sessions established therein have been multiplexed up to a predetermined number.

[Problem to be solved by the invention]

In this way, in the conventional example, multiple logical communication paths were established on -1 physical lines, and sessions established within these logical communication paths were unconditionally multiplexed up to a predefined number of sessions. All sessions established with the partner computer system will be given equal weighting, so if you want to send data preferentially depending on the business content of the application program, or if you want to guarantee a certain degree of response time, it is possible to had uncontrollable shortcomings.

The present invention eliminates such drawbacks and provides a pre-communication processing device that can control the weighting of sessions that are established between a computer system to which the device is connected and a partner computer system. The purpose is to

[Means to solve the problem]

The present invention provides a prefix communication process that is connected to a host computer system via an inter-system communication path and includes a logical communication path establishing means for establishing a logical communication path on a physical communication line that connects a partner computer system with which communication is to be performed. In the apparatus, a logical communication path management means for establishing a logical communication path and instructing the establishment of a session based on the priority of transmission data according to an instruction from an application program of the host computer system when a session is established; The present invention is characterized by comprising a session establishing means for establishing a session for realizing data communication between end systems on the road, and a session multiplexing management means for establishing a plurality of sessions on one logical communication path.

[Effect]

Priority parameters are set at the time of session establishment according to instructions from the application program of the host computer system, and when session establishment is requested, a search is made to see if there is a logical communication path that satisfies the priority parameters. When a logical communication path exists, a session is established on this logical communication path, and on the other hand, when no logical communication path exists, a new logical communication path is established and a session is established on this logical communication path.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of this embodiment. The host computer system 1 has an application program 11
and data priority control means 12. The front-end communication processing device 2 is connected to the host computer system 1 by a bus-like or loop-like intersystem communication path 4, and is connected to the other computer system 3 by a physical communication line 5. The prefix communication processing device 2 is a logical communication path management means 2.
1, logical communication path establishment means 22, session establishment means 23, and session multiplexing management means 24.

In this embodiment, as shown in FIG. 1, a logical communication path is established on a physical communication line 5 that is connected to a host computer system 1 via an intersystem communication path 4 and connects a partner computer system 3 with which communication is to be performed. Furthermore, as a feature of the present invention, the logical communication path is established based on the priority of transmission data according to an instruction from the application program 11 of the host computer system 1 at the time of session establishment. a logical communication path management means 21 that instructs the establishment of a session; a session establishment means 23 that establishes a session for realizing data communication between end systems on the established logical communication path; and session multiplexing management means 24 for establishing sessions.

Next, data priority control means 12, logical communication path management means 21, logical communication path establishment means 22, session establishment means 2
3 and the processing in the session multiplexing management means 24 will be described with reference to FIGS. 2 and 3.

In FIG. 2, data priority control means 12 sets priority parameters when establishing a session based on an instruction from application program 11 or the type of application program 11, and requests front-end communication processing device 2 to establish a session. The priority parameter specifies how much occupancy this session has within the logical channel.

In FIG. 3, the logical communication path management means 21 analyzes the priority parameters of the session establishment request from the host computer system 1, and the session multiplexing management means 24 determines whether there is a logical communication path that satisfies the priority parameters. Search for. As a result of this search process, if a logical communication path that satisfies the priority parameters exists, the session establishment means 23
A session is established on the logical communication path. If there is no logical communication path that satisfies the priority parameters,
The logical communication path establishing means 22 establishes a new logical communication path with the partner computer system, and the session establishing means 2
3, a session is established on the logical communication path. As described above, preferential transmission can be realized by limiting the number of sessions established on the logical communication path and reducing the ratio of waiting transmissions by other sessions.

〔Effect of the invention〕

As explained above, when communicating between computer systems, the present invention controls data priority based on the multiplicity of sessions established in a logical communication path, thereby optimizing the communication speed for each application program depending on its business content. can be set, and has the effect of being able to dynamically respond to changes in business volume.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an embodiment of the present invention. FIG. 2 is a flowchart of data priority determination processing. FIG. 3 is a flowchart of session establishment processing using priority parameters. DESCRIPTION OF SYMBOLS 1... Host computer system, 2... Preliminary communication processing device, 3... Partner computer system, 4... Inter-system communication path, 5... Physical communication line, 11... Application program, 12... Data priority control means, 21... Logical communication path management means, 22... Logical communication path establishment means, 23... Session establishment means, 24...
- Session multiplexing management means. Motion of the fugu example 9f) 2 Motion of the missing figure % 3

Claims (1)

[Scope of Claims] 1. A logical communication path establishment means that is connected to a host computer system via an inter-system communication path and establishes a logical communication path on a physical communication line that connects a communicating party computer system. In the front-end communication processing device, a logical communication path management means for establishing a logical communication path and instructing the establishment of a session based on the priority of transmission data according to an instruction from an application program of the host computer system when establishing a session; The present invention is characterized by comprising session establishment means for establishing a session for realizing data communication between end systems on an established logical communication path, and session multiplexing management means for establishing a plurality of sessions on one logical communication path. A front-end communication processing device.