JPH0630082A - In-device monitoring method - Google Patents

Abstract

(57) [Abstract] [Purpose] Regarding a method for detecting an in-device failure due to an abnormality in signal transmission in a transmission device, it is possible to enable in-device monitoring regardless of the presence or absence of a signal from outside the device. To aim. [Structure] Speed conversion means 1 in transmission source 5 of main signal
Then, the main signal is subjected to speed conversion, and the effective range generating means 2 generates a signal indicating an empty area of the main signal resulting from the speed conversion,
The path pattern generating means 3 generates a path pattern corresponding to the empty area, the path pattern inserting means 4 inserts the generated path pattern in the empty area of the main signal, and the path pattern generating means at the destination 9 of the main signal. In 6, the same path pattern as that of the transmission source 5 is generated corresponding to the empty area of the main signal, the comparing means 7 compares the generated path pattern with the main signal into which the path pattern is inserted, and the alarm issuing means 8 , And issues an alarm indicating an in-device failure according to the comparison result.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for monitoring the presence / absence of a failure in a transmission device, and more particularly, an in-device monitoring system for detecting a failure in the device based on the presence / absence of an abnormality in transmitting a signal in the transmission device. It is about.

For example, a plurality of circuit packages are mounted in a transmission device, and signals are mutually transmitted and received between the packages to perform a predetermined operation.
It is designed to achieve the required functions.

Therefore, in order to monitor the presence / absence of a failure in the transmission device, it is necessary to monitor the presence / absence of an abnormality when a signal is transmitted in the transmission device. It is required that the required monitoring can be performed without being influenced by the presence or absence of the main signal or the content of the main signal.

[0004]

2. Description of the Related Art Conventionally, a path pattern monitoring system has been used as an in-device monitoring system in a transmission device. This is to define a specific bit position in the signal of one frame that does not contain valid information as a path pattern area, insert a monitoring path pattern in this area at the signal transmission source in the device, and at the transmission destination of this signal. When the detected path pattern is normal, the transmitted signal is judged to be normal.

FIG. 6 shows a conventional in-apparatus monitoring method, and FIG. 7 shows an operation time chart of the in-apparatus monitoring method of FIG. The conventional technique will be described below with reference to FIGS. 6 and 7.

In FIG. 6, reference numeral 11 is a self-device which is a transmission device to be monitored, and 12 and 13 are other devices connected to the self-device 11. In the own device 11, 14 indicates a signal transmission source, and 15 indicates a signal transmission destination.

In the transmission source 14, the frame position extraction unit 21 detects the position of the frame in the main signal S ₁₁ transmitted from the other device ₁₂ and extracts the frame signal S ₁₂ . The effective range extraction unit 22 detects the effective information of the main signal S ₁₁ and the empty area (empty) based on the frame signal S ₁₂ , and outputs an effective area signal S ₁₃ indicating the empty area. The path pattern generation unit 23 generates the path pattern S ₁₄ based on the effective range signal S ₁₃ . The path pattern inserting section 24 inserts the path pattern S ₁₄ into the main signal S ₁₁ and outputs the main signal S ₁₅ .

At the transmission destination 15, the path pattern generation unit 2
5 generates a path pattern S ₁₆ based on the frame signal S ₁₂ and the effective range signal S ₁₃ . The comparison unit 26 compares the main signal S ₁₅ and the path pattern S _16, and when they match, the determination signal S ₁₇ becomes “L”, and when they do not match, the determination signal S ₁₇ becomes “H”.
(*) Is output at the timing of the effective range signal S ₁₃ .
The alarm issuing unit 27 issues a predetermined alarm when the determination signal S ₁₇ is "H".

[0009]

In the conventional intra-device monitoring system shown in FIG. 6, the bit position for inserting the path pattern is determined by the frame position of the signal input to the device. Therefore, in the case of disconnection of the input signal to the device, it may not be possible to generate and insert the correct path pattern, and as a result, the internal monitoring of the device may be hindered.

The present invention is intended to solve the above problems of the prior art, and monitors the inside of the transmission device by monitoring the presence or absence of an abnormality when a signal is transmitted. It is an object of the present invention to provide an in-apparatus monitoring method capable of monitoring the inside of the apparatus regardless of the presence or absence of a signal transmitted from outside the apparatus or the content thereof.

[0011]

[Means for Solving the Problems] (1) FIG. 1 shows a principle configuration of the present invention. The present invention relates to an in-apparatus monitoring method for detecting an in-apparatus failure depending on the presence or absence of an abnormality in transmitting a signal in a transmission apparatus, and a speed conversion means 1 for speed-converting a main signal and a main signal generated as a result of the speed conversion. An effective range generating means 2 for generating a signal indicating an empty area,
A path pattern generating means 3 for generating a path pattern corresponding to the empty area and a path pattern inserting means 4 for inserting the generated path pattern in the empty area of the main signal are provided at the transmission source 5 of the main signal and correspond to the empty area. And a path pattern generating means 6 for generating the same path pattern as that of the transmission source 5, a comparing means 7 for comparing the path pattern generated by the path pattern generating means 6 with the main signal into which the path pattern is inserted, and an apparatus according to the comparison result. An alarm issuing means 8 for issuing an alarm indicating an internal failure is provided at the transmission destination 9 of the main signal.

(2) Further, the present invention provides a speed for converting a main signal composed of a serial signal into a parallel signal in an in-apparatus monitoring method for detecting an in-apparatus failure depending on the presence or absence of an abnormality in transmitting a signal in a transmission apparatus. The conversion unit 34 and the parity calculation unit 36 that calculates the parity of the parallel signal.
Is provided in the transmission source 14 of the main signal, and the parity calculation unit 37 that performs the parity calculation of the parallel signal of the conversion result.
And a comparison unit 26 that compares the parity calculation result with the parity calculation result in the transmission source 14, and an alarm issuing unit 27 that issues an alarm indicating an in-device failure according to the comparison result.
And are provided at the transmission destination 15 of the main signal.

[0013]

[Operation] (1) When transmitting a signal in the transmission device,
Monitoring inside the device by converting to a bit rate higher than the effective information bit rate at the transmission source, inserting path patterns into the generated free space at equal intervals, and monitoring that this path pattern is transmitted correctly I do.

By doing so, the inside of the apparatus can be monitored without being influenced by the presence or the content of a signal from outside the apparatus.

(2) When a plurality of signals are transmitted in parallel within the transmission device, the transmission source performs a parity operation on the signals and transmits the operation result to the transmission destination, and the parity of the signal transmitted at the transmission destination. Is calculated, the obtained calculation result is compared with the transmitted parity calculation result, and the signal is correctly transmitted, thereby monitoring the inside of the apparatus.

By doing so, the inside of the device can be monitored without being influenced by the presence or the content of the signal from the outside of the device.

[0017]

FIG. 2 shows an embodiment of the present invention.
Therefore, the same parts as those in FIG.
Is a speed converter that converts the speed of the main signal, and 32 is a speed converter
Valid to generate a signal that indicates the free space in the captured signal
Range generator, 33 converts the converted signal speed to the original speed
It is a speed conversion unit for returning. FIG. 3 shows the operation of the embodiment of FIG.
It is a time chart. Below, FIG. 2 and
An embodiment of the present invention will be described with reference to FIG. Note that
In the embodiment, the in-apparatus monitoring is performed by using the path pattern insertion unit 24.
This is performed for the section up to the degree conversion unit 33. Smell in Figure 3
D₁₁~ D _13,D_{twenty one}~ D_{twenty three,}D₃₁~ D_33,… Is valid
Report, P_1,P_2,P_3,…, P₁'_,P ₂'_,P₃'_,… Is a superintendent
The visual path pattern is shown.

When a main signal S ₂₁ having a bit rate of 6 MHz is input from the other device 12 to the own device 11, the main signal S ₂₁ is
It is input to the speed conversion unit 31 in the transmission source 14. The speed conversion unit 31 inserts an empty bit of 1 bit for every 3 bits of the main signal S ₂₁ , converts it into the main signal S ₂₂ having a bit rate of 8 MHz, and sends it out. The effective range generation unit 32 uses the main signal S ₂₂ generated by the speed conversion unit 31,
A signal S ₂₆ that becomes “H” corresponding to the empty area is generated and output.

The path pattern generator 23 receives the signal S₂₆According to
And a bit rate of 2 MHz, for example 10000000,
10101010 etc.
Fixed pattern S_{twenty three}Is sent. Pass pattern insertion part 24
Is the main signal S_{twenty two}Fixed pattern S to _{twenty three}Main signal S_{twenty four}
Is generated and transmitted to the transmission destination 15. This main signal S
_{twenty four}Is a fixed pattern in the speed conversion unit 33 at the transmission destination 15.
S_{twenty three}And the main signal S with a bit rate of 6 MHz is removed again.₂₈
Is converted to the other device 13 and sent to the other device 13.

At the destination 15, the main signal S_{twenty four}Is the comparison unit 26
Entered in. In addition, the pass pattern generation unit 25
Signal S from the forming unit 32₂₆Depending on the fixed pattern S_{twenty three}Same as
Fixed pattern S with the same contents_{twenty five}Is generated and input to the comparison unit 26
To do. The comparison unit 26 receives the signal S ₂₆Only when is "H"
Signal S_{twenty four}And fixed pattern S_{twenty five}And when there is a mismatch
Signal S that becomes "H"₂₇(,,, ...) is generated.
In the figure, is P₁≠ P₁Is'H ', and is P₂
≠ P₂Is'H ', and is P₃≠ P₃'When
It becomes "H". The alarm issuing unit 27 uses the signal S₂₇Is "H"
At this time, a predetermined alarm indicating an abnormality in the device is issued.

FIG. 4 shows another embodiment of the present invention, in which the same parts as those in FIG.
Reference numeral 34 is a speed conversion unit that converts a serial signal into a parallel signal, 35 is a speed conversion unit that converts a parallel signal into a serial signal, and 36 and 37 are parity calculation units that perform vertical parity calculation. FIG. 5 shows an operation time chart of the embodiment shown in FIG. Another embodiment of the present invention will be described below with reference to FIGS. 4 and 5. In the present embodiment, in-apparatus monitoring is performed from the speed conversion unit 34 to the speed conversion unit 35.
It is done about the section up to. In FIG. 5, D _{11 to} D
_14, D _{21 to} D _{24 ,} D _{31 to} D _34, ... Show valid information, P
_1, P _2, P _3, ..., P ₁ ′ _, P ₂ ′ _, P ₃ ′ _, ... Denote monitoring path patterns.

When the main device S ₃₁ having a bit rate of 6 MHz is input to the own device 11 from the other device 12, the main signal S ₃₁ is
It is input to the speed conversion unit 34 in the transmission source 14. The speed conversion unit 34 divides the main signal S ₃₁ into four main signals S _{321 to} S ₃₂₄ having a bit rate of 1.5 MHz and sends them to the transmission destination 15 and the parity calculation unit 36. Parity calculator 3
In 6, the parity of the main signals S _{321 to} S ₃₂₄ is calculated,
The calculation result S ₃₃ is sent out.

At the transmission destination 15, the main signal S₃₂₁ ~ S₃₂₄ But
It is input to the parity calculator 37. Parity calculator 37
Then, the main signal S₃₂₁ ~ S₃₂₄ To calculate the parity of
Priority calculation result S₃₄Is output. The comparison unit 26 is a parite.
I Calculation result S₃₃And S₃₄And when there is a mismatch
Signal S that becomes "H"₃₅To occur. The alarm issuing unit 27,
Signal S₃₅When "H" is, a predetermined alarm indicating an abnormality in the device
To issue. The speed conversion unit 35 uses the main signal S₃₂₁ ~ S₃₂₄ 
Of the main signal S with a bit rate of 6 MHz after speed conversion ₃₆To
It is generated and sent to the other device 13.

[0024]

As described above, according to the present invention, in the in-apparatus monitoring method for monitoring the inside of the apparatus by monitoring the presence / absence of an abnormality when a signal is transmitted in the transmission apparatus, In-apparatus monitoring can be performed regardless of the presence or absence of a signal or the content of the signal. Further, in the case of the present invention, it is not necessary to extract a specific bit that does not include valid information in a signal from the outside, so that it is possible to reduce the hardware scale.

[Brief description of drawings]

FIG. 1 is a diagram showing a principle configuration of the present invention.

FIG. 2 is a diagram showing an embodiment of the present invention.

FIG. 3 is a diagram showing an operation time chart of the embodiment of FIG.

FIG. 4 is a diagram showing another embodiment of the present invention.

5 is a diagram showing an operation time chart of the embodiment in FIG.

FIG. 6 is a diagram showing a conventional in-device monitoring method.

7 is a diagram showing an operation time chart of the in-device monitoring system of FIG.

[Explanation of symbols]

 1 speed conversion means 2 effective range generation means 3 path pattern generation means 4 path pattern insertion means 5 transmission source 6 path pattern generation means 7 comparison means 8 alarm issuing means 9 transmission destination 14 transmission source 15 transmission destination 26 comparison unit 27 alarm transmission unit 34 speed conversion Part 36 Parity calculator 37 Parity calculator

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Noriyuki Yogoe 1015 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa, Fujitsu Limited (72) Inventor Shigeta Samukawa, 1015, Kamiodanaka, Nakahara-ku, Kawasaki, Kanagawa Prefecture, Fujitsu Limited

Claims (2)

[Claims] 1. An in-apparatus monitoring method for detecting an in-apparatus failure depending on the presence or absence of an abnormality in transmitting a signal in a transmission apparatus, and a speed conversion means (1) for speed-converting a main signal, and the speed conversion result. The effective range generating means (2) for generating a signal indicating the empty area of the main signal, the path pattern generating means (3) for generating a path pattern corresponding to the empty area, and the effective area generating means for generating the signal in the empty area of the main signal. A path pattern inserting means (4) for inserting a path pattern is provided in the transmission source (5) of the main signal, and a path pattern generation means (6) for generating the same path pattern as the transmission source (5) corresponding to the empty area. A comparing means (7) for comparing the generated path pattern with a main signal having the path pattern inserted therein; and an alarm issuing means (8) for issuing an alarm indicating an in-device failure according to the comparison result. Device monitoring method, characterized in that a preparative main signal transmission destination (9). 2. A speed conversion unit (34) for converting a main signal composed of a serial signal into a parallel signal in an in-device monitoring method for detecting an in-device failure depending on whether or not there is an abnormality in transmitting a signal in the transmission device. , A parity calculator (36) for calculating the parity of the parallel signal, and a transmission source (1
4), a parity operation unit (37) for performing a parity operation of the parallel signal, a result of the parity operation and the transmission source (14).
Comparison unit (26) for comparing the parity calculation result in
And an alarm issuing unit (27) for issuing an alarm indicating an in-device failure according to the comparison result, are provided in the main signal transmission destination (15).