JPH02295263A - Communication mismatching detecting device - Google Patents

Abstract

PURPOSE:To detect the mismatching of a communication state which can not be detected by a communication control program conventionally by inputting the communication states of a primary station and a secondary station, deciding whether or not the respective states matches each other as to protocol, and outputting the states when not. CONSTITUTION:The detecting device consists of a primary station buffer 1, a secondary station buffer 2, a matching decision control part 3, a matching control data storage part 4, and an output data buffer 5. Then data which shows whether or not the combinations of communication states between the primary and secondary stations prescribed by the protocol match each other is generated and held previously and the communication state between the primary and secondary stations are inputted; and mismatching data and the communication states of the primary and secondary stations are compared and inspected to detect communication mismatching and when the mismatching is detected, data showing the state of the mismatching is outputted. Consequently, the mismatching of the communication state between the primary and secondary stations which can not be detected by a conventional communication program is detected.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is directed to the effective operation and utilization of an information network in which information processing devices such as computers and terminals are connected through a communication network consisting of transmission equipment and switching equipment. It can be used in various industrial fields. Specifically, communication control system. This invention relates to a communication mismatch detection device used in network integrated management systems, network fault management systems, network fault diagnosis systems, etc.

[Conventional technology]

When a computer (primary station) and a terminal (secondary station) or a computer (primary station) and a computer (secondary station) communicate with each other, the rules (protocol) for communication are specified in the communication control program. If a communication sequence contrary to the above occurs, an error message etc. will be generated.
The process has already been interrupted. In many cases, the cause of these communication abnormalities is obvious. However, in many cases, failures during network operation cannot be detected solely by communication mismatches caused by the communication control program, and there is no device that can deal with communication failures that are unknown to the communication control program.

[Problem to be solved by the invention]

Detects inconsistencies in communication status that cannot be detected conventionally using a communication control program. The communication status of the primary station and the secondary station is input, and it is determined whether the existence of each status at the same time is consistent according to the protocol rules. If there is a mismatch, the communication status is outputted. A matching detection device is provided.

[Means to solve the problem]

The communication mismatch detection device of the present invention includes means for temporarily maintaining a state specified by the protocol of the primary station when the primary station and the secondary station communicate with each other; A means to temporarily maintain the state specified by the protocol of a certain secondary station, and a means to maintain whether the simultaneous existence of the states of the primary station and the secondary station is logically correct according to the protocol specification. means for determining and controlling whether or not the states of the primary station and the secondary station are in a communication mismatch; and means for outputting a communication mismatch when the determination is a mismatch. do.

In the present invention, data indicating whether or not the combination of communication states between the primary station and the secondary station specified in the protocol is consistent with the communication protocol (protocol) is created and maintained, and the data between the primary station and the secondary station is By inputting the communication status of the primary station and secondary station output from a device or software that monitors the communication status between the This is achieved by detecting communication mismatches and, in the case of mismatches, outputting data representing the mismatch situation.

[Effect]

According to the present invention, among the combinations of communication states between a primary station and a secondary station, a communication state that is inconsistent according to protocol rules is detected, and information about the communication state inconsistency is used in an application program or hardware. becomes possible. In particular, information on communication status mismatch is important in network fault management systems and fault diagnosis systems, and can provide effective information to the systems.

[Embodiment] An embodiment of the communication mismatch detection device of the present invention is shown in the block diagram of FIG.

The primary station status buffer l temporarily stores the communication status on the primary station side defined by the protocol.

The secondary station status buffer 2 temporarily stores the communication status on the secondary station side defined by the protocol.

The data temporarily held in the primary station status buffer 1 and secondary station status buffer 2 is transferred to the consistency determination control unit 3.

The consistency determination control unit 3 determines whether the contents of the primary station status buffer 1, the contents of the secondary station status buffer 2, and the combination of the primary station status and secondary station status match those specified by the protocol. Comparison is made with the contents of the consistency data storage unit 4 that stores descriptive data indicating whether or not the content is consistent, and a determination of consistency or inconsistency is made. In the case of mismatch, data containing the combined contents of the primary station state buffer 1 and the secondary station state buffer 2 is output to the output data buffer 5 as mismatched data.

The output data buffer 5 temporarily holds information output as inconsistent data by the consistency determination control unit 3.

The data representing consistency in the consistency data storage unit 4 is as follows:
As shown in FIG. 2, primary station status data (A) field 6 corresponds to the contents of the primary station status buffer 1, and secondary station status data (B) corresponds to the contents of the secondary station status buffer 2.
field 7, and a compatibility determination bit (C) field 8, which indicates O when the state of the primary station and the state of the secondary station match the protocol, and indicates 1 when they do not match.

The consistency determination unit 3 in FIG. Search for data that matches the data field of secondary station status data B, match with 0/1 of the judgment bit of the data,
Determine inconsistency.

In this embodiment, a communication status monitoring device for the primary station can be used to obtain the communication status on the primary station side, and FIG. 3 shows an example of the configuration of this monitoring device.

The input data buffer 31 temporarily stores transmission data from the primary station for subsequent processing.

The current status buffer 32 temporarily stores the current communication status of the primary station.

The merging device 33 concatenates the data contents of the input data buffer 31 and the current state buffer 32 and stores the data in the comparison data buffer 34 .

The comparison data buffer 34 holds the current communication state and the transmission data performed in the communication state.

The transition state buffers 35, . Transition state buffer 35. 357, as shown in FIG. 4, a current state data (E) field 42 that stores the communication state, a transition factor data (D) field 41 that stores transmission data that is the basis for a transition of the current state, and a transition field. Transition state data (H) field 4 that stores the previous communication state
5. In order to express a more specific communication mismatch state, a flag sequence (F) field 43 stores a bit string expressing a characteristic pattern in the communication state transition series up to the present, and the communication state transition is a self-loop. , but stores the limit number of self-loops - {U(
G) Field 44, a command flag bit (■) that expresses the presence or absence of an instruction to create a characteristic pattern in the transition series of communication states up to now; field 46; self-loop if the current state data and transition state data are the same; In order to represent this, it has a count-up command bit (J) field 47 that represents whether or not the self-loop counter value is to be incremented once.

The comparison data buffer 34 in FIG. 3 includes the transition factor data field 4L current state data field 42 in FIG.
It consists of a flag sequence field 43 and a counter overflow value field 44.

The transition state buffer control unit 36 controls the comparison data buffer 3
4 and the contents of the transition state buffers 351 to 351 are sequentially transferred to the data comparison control unit 37.

The data comparison control unit 37 compares the contents of the comparison data buffer 34 with the corresponding contents of one transition state buffer,
If they match, the transition state data shown in FIG. 4 is synthesized with the flag sequence F and the counter overflow value G data field to create current state data E, which is output to the outside and the current state buffer 32, and is output to the data comparison control section. 37 is notified to the transition state buffer control unit 36. When creating the current state data E, the matching command flag bits of the transition state buffers 35, -357. If the count up command bit I-J is set, the flag sequence F including the counter value is also changed.

The transition state buffer control unit 36 that receives the processing completion notification from the data comparison control unit 37 stops transferring the contents of the transition state buffer to the data comparison control unit 37 and waits until new data is input to the comparison data buffer 34. become a state.

Transition state buffer 35. The contents of ~35n are not automatically created, but must be created by the user according to the type of protocol and the knowledge of the operator/maintainer. When implementing a communication state monitoring device for a secondary station that supports many protocols, the transition state buffer 35. ~35, are logically grouped to correspond to each protocol, and the transition state buffer control unit 36 performs a data comparison system with this grouping in mind. Transition state buffer 3 transferred to 711 section 37
5, to 35,,.

By using such a communication status monitoring device for the primary station, it is possible to obtain the status of the primary station according to the protocol regulations at any time.

Further, in this embodiment, a communication status monitoring device for the secondary station can be used to obtain the communication status on the secondary station side, and FIG. 5 shows an example of the configuration of this monitoring device.

The input data buffer 51 temporarily stores received data from the primary station or transmitted data from the secondary station for subsequent processing.

The current status buffer 52 stores the current communication letter of the secondary station? temporarily stored.

The merging device 53 concatenates the data contents of the input data buffer 5 l and the current state buffer 52 and stores the data in the comparison data buffer 54 .

The comparison data buffer 54 holds the current communication state and the transmission data performed in the communication state.

Transition state buffers 551-55. holds the states defined by the protocol (hereinafter referred to as communication states) and the transition relationships between each state. The transition state buffers 551 to 55■ are the sixth
As shown in the figure, current status data (
L) field 62, transition factor data that stores the received data that causes the current state transition (K) field 6l, transition state data CM that stores the communication state of the transition destination
) field 63.

The comparison data buffer 54 in FIG. 5 includes the transition factor data field 6l and the current state data field 62 in FIG.
It consists of

The transition state buffer control unit 56 controls the comparison data buffer 5
4 contents and transition state buffer 55. ~55. Control is performed to sequentially transfer the contents of to the data comparison control section 57.

The data comparison control unit 57 compares the contents of the comparison data buffer 54 with the corresponding contents of one transition state buffer,
If they match, the transition state data M shown in FIG. 6 is replaced with the current state data L, output to the outside and to the current state buffer 52, and the transition state buffer control section 56 is notified of the completion of the processing by the data comparison control section 57.

The transition state buffer control unit 56, which has received the processing completion notification from the data comparison control unit 57, stops transferring the contents of the transition state buffer to the data comparison control unit 57 and waits until new data is input to the comparison data buffer 54. become a state.

The contents of the transition state buffers 551 to 557 are not automatically created, but must be created by the user according to the type of protocol and the knowledge of the operator/maintainer. When implementing a communication status monitoring device for a secondary station that supports many protocols, transition status buffers 55, 55. , are logically grouped to correspond to each protocol, and a transition state buffer control section is created. 6 is a transition state buffer 551 that transfers to the data comparison control unit 57 with this grouping in mind.
~55■ is controlled.

In this way, by using the communication status monitoring device for the secondary station, it is possible to obtain the protocol-defined status of the secondary station at any time.

〔Effect of the invention〕

By using the communication mismatch detection device according to the present invention, it becomes possible to detect mismatches in the communication status between the primary station and the secondary station that cannot be detected using conventional communication control programs, and it is also possible to detect communication failures on the computer network. If this occurs, it becomes possible to detect the degree of communication mismatch, which is a clue to investigating the cause. Compared to conventional manual work, the cost of detecting communication inconsistencies can be significantly reduced. It becomes possible to effectively capture and provide data indicating inconsistencies in communication states to a system that manages faults occurring in computer networks.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the communication mismatch detection device of the present invention, FIG. 2 is a diagram showing the contents of each data field of the consistency data storage section of FIG. 1, and FIG. , a block diagram showing an example of the configuration of a communication state monitoring device for a primary station, FIG. 4 is a diagram showing the contents of each data field of the transition state buffer in FIG. 3, and FIG. FIG. 6 is a block diagram showing an example of the configuration of the communication state monitoring device. FIG. 6 is a diagram showing the contents of each data field of the transition state buffer in FIG. 1...Primary station status buffer 2...Secondary station status buffer 3...Consistency judgment control section 4...Consistency control data storage section 5...Output Data buffer 6...Primary station status data field 7...
Secondary station status data field 8...Judgment bit field

Claims (1)

[Claims] (1) When a primary station and a secondary station communicate with each other, a means for temporarily maintaining the state specified by the protocol of the primary station, and a means of maintaining the state specified by the protocol of the secondary station with which the primary station communicates. A means for temporarily maintaining a specified state, a means for maintaining whether the simultaneous existence of the states of the primary station and the secondary station is logically correct according to the protocol specifications, and A communication mismatch detection device comprising means for determining and controlling whether or not the state of a next station is a communication mismatch, and means for outputting a communication mismatch when the determination is a mismatch.