JPH06259354A - Processor monitoring device - Google Patents

Abstract

PURPOSE:To prevent communication traffic from increasing due to increase of control frames as increase of processors to be monitored. CONSTITUTION:This processor monitoring device is equipped with a data transmission and reception part 11 which sends and receives data among plural processors, a protocol analysis part 14 which analyzes the received data and requests a time setting part 16 to start and stop a monitoring timer, a no- communication monitoring part 15 which monitors the state of no communication with the processors 12 to be monitored and requests the data transmission and reception part 11 to send out a monitor frame when the no-communication state continues for longer than a certain time, the time setting part 16 which informs the protocol analysis part 14 of a time-out state, and a control part 17 which controls the respective parts. Only when the no-communication state continues for longer than the certain time, the monitor frame is sent and an answer frame is received to confirm the operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processor monitoring device in a system including a plurality of processors.

[0002]

2. Description of the Related Art FIG. 3 is a block diagram showing the configuration of a conventional processor monitoring apparatus. In FIG. 3, reference numeral 1 denotes a monitoring processor, and a plurality of monitoring target processors 2 (a, b,
c) is monitored by transmitting a monitor frame and receiving a response frame. Reference numeral 3 denotes a data transmission / reception unit that transmits / receives data to / from the monitoring target processor 2, transmits data requested by the protocol analysis unit 4 to the monitoring target processor 2, and receives data from the monitoring target processor 2 as a protocol. It has a function of transmitting to the analysis unit 4. A protocol analysis unit 4 analyzes data received from the data transmission / reception unit 3 and the time setting unit 5, issues a data transmission request to the data transmission / reception unit 3 according to a predetermined protocol, and also a non-communication monitoring timer and a response delay monitoring timer. The time setting unit 5 is requested to start and stop. A time setting unit 5 starts and stops the timer requested by the protocol analysis unit 4 and notifies the protocol analysis unit 4 that a time-out has occurred. A control unit 6 controls and monitors the data transmitting / receiving unit 3, the protocol analyzing unit 4, and the time setting unit 5. Monitored processor 2
The data transmission / reception unit 7, the protocol analysis unit 8 and the control unit 9 of (a) also have the same function,
(B) and 2 (c) have the same configuration.

An example of the operation of the conventional processor monitoring apparatus configured as described above will be described below with reference to the sequence diagram of FIG. The symbols used in FIG. 4 will be described here. [SABM] is a link setting command and is a frame for requesting data link setting for data communication. [UA]
Is a response frame to [SABM] and means that data can be received. [I frame] is an information frame. [RRR] is a response frame to the information frame or the supervisory frame. [RRC] is a monitoring frame, which is a frame for confirming the normal operation of the monitored processor. T1 is a non-communication monitoring timer, which measures the interval at which the monitoring frame [RRC] is transmitted. T2 is a response delay monitoring timer, which starts after transmitting the monitoring frame [RRC] and stops when receiving the response frame [RRR].

A description will be given below according to the sequence diagram of FIG. The protocol analysis unit 4 of the monitoring processor 1 requests the data transmission / reception unit 3 to transmit the link setting request command [SABM] in order to enable data communication with the monitoring target processor 2 (a). Upon receiving the data transmission request, the data transmission / reception unit 3 sends a [SA
BM] is transmitted. The data transmission / reception unit 7 of the monitored processor 2 (a) that receives the [SABM] notifies the protocol analysis unit 8 of the received data. Protocol analysis unit 8
Requests the data transmission / reception unit 7 to transmit the response frame [UA]. Data transmission / reception unit 7 that has received a data transmission request
Sends [UA] to the monitoring processor 1 to notify that data can be sent and received. The data transmission / reception unit 3 of the monitoring processor 1 that receives [UA] notifies the protocol analysis unit 4 of this. The protocol analysis unit 4 requests the time setting unit 5 to activate the non-communication monitoring timer T1 with the monitoring target processor 2 (a). Similarly, link setting is also performed between the monitored processors 2 (b) and 2 (c), and when the [UA] frame is received, the activation of the T1b and T1c timers is requested. Therefore, as many T1 timers as the number of monitored processors are required. After that, information frames are transmitted and received between the processors.

When the monitoring timer T1a times out, the time setting unit 5 notifies the protocol analyzing unit 4 of the monitoring timer T1a timeout. The protocol analysis unit 4 that has received the T1a timeout issues a transmission request for transmitting the monitoring frame [RRC] to the monitored processor 2 (a) to the data transmission / reception unit 3, and activates the response delay monitoring timer T2a. Request to 5. The data transmitting / receiving unit 3 that has received the data transmission request transmits [RRC] to the monitored processor 2 (a). [RRC]
The data transmission / reception unit 7 of the monitored processor 2 (a) that has received the notification notifies the protocol analysis unit 8 of the received data.
The protocol analysis unit 8 returns the response frame [RRR] and notifies that it is operating normally. The data transmission / reception unit 3 of the monitoring processor 1 which receives the [RRR] notifies the protocol monitoring unit 4 of this. Protocol analysis unit 4
Requests the time setting unit 5 to stop the response delay monitoring timer T2a with the monitoring target processor 2 (a), and activates the non-communication monitoring timer T1a with the monitoring target processor 2 (a). Request to. After that, when the timeout of T1a occurs, the same processing is performed and the processor is monitored.

[0006]

However, in the above-described conventional processor monitoring apparatus, when the number of processors to be monitored increases, the number of monitoring frames and response frames increases and decreases in addition to the normal information frame transmission and reception. There is a problem that communication traffic increases due to the control frame.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a processor monitoring device capable of preventing an increase in communication traffic for control frames.

[0008]

To achieve the above object, the present invention provides an information frame between a plurality of processors,
Analyze the data received from the data transceiver that transmits and receives the monitoring frame, response frame, etc.
The data transmission request is sent to the data transmission / reception unit according to a predetermined protocol, and the non-communication state between the protocol analysis unit that requests the time setting unit to start and stop the monitoring timer and the monitored processor is monitored, and the non-communication state is kept constant. If it continues for more than the specified time, the non-communication monitoring unit that requests the data transmission / reception unit to send a monitoring frame and the timer management by the timer start / stop request from the protocol analysis unit are performed. It is provided with a time setting unit for performing notification, a data transmission / reception unit, a protocol analysis unit, a non-communication monitoring unit, and a control unit for controlling and monitoring the time setting unit.

[0009]

According to the present invention, with the above configuration, the non-communication monitoring unit of the monitoring processor temporarily stops the activated monitoring timer when the information frame from the processor to be monitored or the response frame to the information frame is received, and then restarts. By starting the non-communication monitoring timer, the monitoring frame is sent out only when the completely non-communication state continues for a certain time or longer, and the operation confirmation is performed by receiving the response frame, so that the communication traffic by the control frame is increased. Can be prevented.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a processor monitoring apparatus according to an embodiment of the present invention. In FIG. 1, reference numeral 11 denotes a monitoring processor, which monitors a plurality of monitoring target processors 12 (a, b, c) by transmitting a monitoring frame and receiving a response frame. Reference numeral 13 denotes a data transmission / reception unit that transmits / receives data to / from the monitoring target processor 12, transmits data requested by the protocol analysis unit 14 to the monitoring target processor 12, and receives data from the monitoring target processor 12 as a protocol. It has a function of transmitting to the analysis unit 14. Reference numeral 14 denotes a protocol analysis unit, which analyzes data received from the data transmission / reception unit 13 and the time setting unit 16, issues a data transmission request to the data transmission / reception unit 13 according to a predetermined protocol, and also a non-communication monitoring timer and a response delay monitoring timer. The time setting unit 16 is requested to start and stop. Reference numeral 15 denotes a non-communication monitoring unit, which is one of the functions of the protocol analysis unit 14 that requests the data transmission / reception unit 13 to transmit a monitoring frame when the non-communication state with the monitoring target processor 12 continues for a certain time or longer. . A time setting unit 16 starts and stops the timer requested by the protocol analysis unit 14 and notifies the protocol analysis unit 14 that a timeout has occurred. A control unit 17 controls and monitors the data transmission / reception unit 13, the protocol analysis unit 14, the non-communication monitoring unit 15, and the time setting unit 16. The data transmission / reception unit 18, the protocol analysis unit 19, and the control unit 20 of the monitoring target processor 12 (a) have the same functions, and the monitoring target processors 12 (b) and 12 (c) have the same configuration.

An example of the operation of the conventional processor monitoring apparatus configured as described above will be described below with reference to the sequence diagram of FIG. The symbols used in FIG. 2 will be described here. [SABM] is a link setting command and is a frame for requesting data link setting for data communication. [UA]
Is a response frame to [SABM] and means that data can be received. [I frame] is an information frame. [RRR] is a response frame to the information frame or the supervisory frame. [RRC] is a monitoring frame, which is a frame for confirming the normal operation of the monitored processor. T1 is a non-communication monitoring timer, which measures the interval at which the monitoring frame [RRC] is transmitted. T2 is a response delay monitoring timer, which starts after transmitting the monitoring frame [RRC] and stops when receiving the response frame [RRR].

The sequence will be described below with reference to the sequence diagram of FIG. The protocol analysis unit 14 of the monitoring processor 11 requests the data transmission / reception unit 13 to transmit a link setting request command [SABM] in order to enable data communication with the monitoring target processor 12 (a). The data transmission / reception unit 13 that has received the data transmission request operates the monitored processor 12
Send [SABM] to (a). Data transmitter / receiver 1 of monitored processor 12 (a) that received [SABM]
8 notifies the protocol analysis unit 19 of the received data.
The protocol analysis unit 19 requests the data transmission / reception unit 18 to transmit the response frame [UA]. Upon receiving the data transmission request, the data transmission / reception unit 18 sends a [U
A] is transmitted to notify that data can be transmitted and received. The data transmission / reception unit 13 of the monitoring processor 11, which has received [UA], notifies the protocol analysis unit 14 of this. The protocol analysis unit 14 includes the monitoring target processor 12
The time setting unit 16 is requested to start the non-communication monitoring timer T1 with (a). Similarly, the monitored processor 12
Link settings are also made between (b) and 12 (c),
When the [UA] frame is received, activation of the T1b and T1c timers is requested. Therefore, as many T1 timers as the number of monitored processors are required. After that, the transmission and reception of the information frame is performed between the processors.

Before the monitoring timer T1a times out, the data transmission / reception unit 13 notifies that the information frame or the response frame has been received (the response frame [RRR] is received in the figure) from the monitored processor 12 (a). Then, the non-communication monitoring unit 15 determines that the monitoring target processor 12 (a) is operating normally, temporarily stops the monitoring timer T1a that is currently activated, and then restarts T
1a Request timer activation. When the T1a timeout occurs, the time setting unit 16 causes the protocol analysis unit 14 to
To T1a timeout. Upon receiving the T1a timeout, the protocol analysis unit 14 receives the monitoring frame [R
RC] to the monitored processor 12 (a) is sent to the data transmitting / receiving unit 13, and the time setting unit 16 is requested to start the response delay monitoring timer T2a.
The data transmission / reception unit 13 that has received the data transmission request transmits [RRC] to the monitored processor 12 (a). [R
The data transmission / reception unit 18 of the monitored processor 12 (a) that has received the [RC] notifies the protocol analysis unit 19 of the received data. The protocol analysis unit 19 returns a response frame [RRR] and notifies that it is operating normally. The data transmitting / receiving unit 13 of the monitoring processor 11 that receives the [RRR] notifies the protocol monitoring unit 14 of this. The protocol analysis unit 14 includes the monitoring target processor 12
(A) requests the time setting unit 16 to stop the response delay monitoring timer T2a, and activates the non-communication monitoring timer T1a with the monitoring target processor 12 (a).
Request to. After that, when the timeout of T1a occurs, the same processing is performed and the processor is monitored.

The present invention is equally effective when the communication between the processors is wired or wireless.

[0015]

According to the present invention, as is apparent from the above-described embodiment, the monitoring timer is once stopped for the processor that has returned the response frame and then restarted, and the non-communication state has passed for a certain time or more. The monitoring frame is transmitted only in this case, and the response frame is received to confirm the operation. Therefore, it is possible to prevent the communication traffic from increasing due to useless control frames, and perform effective and efficient processor monitoring. be able to.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a processor monitoring device according to an embodiment of the present invention.

FIG. 2 is a sequence diagram showing an operation of a processor monitoring device according to an embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a conventional processor monitoring device.

FIG. 4 is a sequence diagram showing an operation of a conventional processor monitoring device.

[Explanation of symbols]

 11 Monitoring Processor 12 (a, bc) Monitored Processor 13 Data Transmitter / Receiver 14 Protocol Analyzer 15 Non-Communication Monitor 16 Time Setting 17 17 Controller 18 Data Transmitter / receiver 19 Protocol Analyzer 20 Controller

Claims (3)

[Claims] 1. An information frame between a plurality of processors,
A data transmission / reception unit that transmits / receives a monitoring frame, a response frame, and the like, and analyzes data received from the data transmission / reception unit, issues a data transmission request to the data transmission / reception unit according to a predetermined protocol, and activates and deactivates the monitoring timer by time. A protocol analysis unit that requests the setting unit,
A non-communication monitoring unit that monitors the non-communication state with the monitoring target processor and requests the data transmission / reception unit to send a monitoring frame when the non-communication state continues for a certain time or more, and a timer start / stop from the protocol analysis unit. It controls the timer by request management, and controls and monitors the time setting unit that notifies the protocol analysis unit of the timeout when a time-out occurs, and the data transmission / reception unit, protocol analysis unit, non-communication monitoring unit and time setting unit. A processor monitoring device including a control unit. 2. The processor monitoring device according to claim 1, wherein the communication is wired communication between processors. 3. The processor monitoring apparatus according to claim 2, wherein the communication is wireless inter-processor communication.