JPH1051359A - Failure diagnosis method - Google Patents

Abstract

(57) [Summary] The present invention relates to a failure diagnosis method and an object thereof is to avoid unnecessary failure processing. SOLUTION: It has a relay node device and two transmission line interfaces interfacing with standby redundancy,
And a relay node and a node device for transmitting and receiving transmission information, wherein the relay node device relays the fault information received from the preceding transmission section, and whether the transmission information is normally received. The node device includes: a pseudo-information generating unit that generates pseudo-information; and a transmission line interface and a transmission line that correspond to two transmission line interfaces according to the relayed failure information. A loop check means for releasing the connection and loop-checking the current transmission path interface and adapting the result to one of them, and a pseudo-information transmission means for transmitting pseudo-information as transmission information to the transmission path during the period; Is configured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a node device connected to one end of a transmission section in which an alarm indicating a failure in a transmission path is transmitted end-to-end and diagnosing a cause of the failure adapted to the alarm. To a fault diagnosis method.

[0002]

2. Description of the Related Art Different digital hierarchies conventionally applied individually in Japan, the United States and Europe have been unified under the initiative of ITU-T as SDH (Synchronous Digital Hierachy) which is a world standard interface.
H is being actively applied in various countries because flexible synchronous multiplexing of various signals is possible and maintenance and operability are rich.

[0003] Further, in a trunk transmission line to which SDH is applied, since the installation and operation of individual node devices connected to the transmission line are individually performed by different communication companies, the transmission line or the like is generally used. No processing is performed on the alarm indicating the failure that has occurred. Therefore, such an alarm is transmitted and received end-to-end between node devices independently operated by individual communication carriers, and predetermined failure diagnosis processing and failure processing are performed.

FIG. 9 is a diagram showing a configuration example of a transmission system to which a conventional failure diagnosis system is applied. In the figure, transmission devices 101 ₁ and 101 ₂ are connected to one ends of transmission lines 102 ₁ and 102 ₂ to which SDH is applied, respectively.
The other ends of 02 ₁ and 102 ₂ are connected to a high-speed highway 103 via transmission lines 104 ₁ and 104 ₂ , respectively. FIG.
0 is a diagram showing the configuration of the transmission devices 101 ₁ and 104 ₁ .

[0005] In Figure, the transmission device 101 _1, FIG. 9
Transmission line 102 ₁ of one end of the up link 102 _1u Break contact 11 provided on the secondary side of the relay 111 ₁ shown in
2 ₁ , 112 ₂ and these break contacts 11
2 _11, 112 ₁₂ neutral contacts 113 ₁₁ corresponding to, 113 _12
Are connected to the balanced outputs of the unbalanced-balanced converter (U / B) _114OS . Downlink ₁ of transmission line 102 1
One end of 02 _1d is connected to break contacts 112 ₂₁ , 112 ₂₂ provided on the secondary side of the relay 111 ₂ , and the neutral contact 11 corresponding to these break contacts 112 ₂₁ , 112 ₂₂
Reference numerals 3 ₂₁ and 113 ₂₂ denote balanced-unbalanced converters (B / B
U) Connected to the balanced input of _114OR . The output of the balanced-unbalanced converter (B / U) 114 _0R is output from the line alarm detector 115.
, And the output of the line alarm detection unit 115 is connected to the first input of the failure diagnosis processing unit 116. Make contacts 117 ₁₁ , 1 paired with break contacts 112 ₁₁ , 112 ₁₂ with neutral contacts 113 ₁₁ , 113 ₁₂ respectively.
17 ₁₂ is an unbalanced-balanced conversion unit (U /
B) Balance-unbalance conversion unit (B / U) paired with 114 _OS
114 _1R Connected to balanced input. Neutral contact 113 ₂₁ ,
113 _{22 and} break contacts 112 ₂₁ , 11
2 make contact 117 ₂₁ having a ₂₂ pair, 117 _22, equilibrated respectively above - unbalanced conversion unit (B / U) 114 _0R paired to form unbalanced - balanced converting unit (U / B) of 114 _1S equilibrium Connected to output. Balance-unbalance converter (B / U) 11
4 outputs of the _1R is connected to a second input of the failure diagnosis process unit 116, first and second outputs of the fault diagnosis process unit 116 is connected to the relay 111 _1, 111 ₂ of the primary side.

In the transmission device 104 ₁ , the other end of the uplink 102 _{1 u} of the transmission line 102 ₁ shown in FIG. 9 is connected to a break contact 122 ₁₁ provided on the secondary side of the relay 121 ₁ ,
122 ₁₂ and make contacts 127 ₃₁ , 127 ₃₂ provided on the secondary side of the relay 121 ₃ , and neutral contacts 123 corresponding to these break contacts 122 ₁₁ , 122 _12.
11 and 123 ₁₂ are balanced-unbalanced converters (B / U), respectively.
Connected to the balanced input of _124OR .

[0007] Transmission line 102₁ Downlink 102 of_1dof
The other end is a relay 121_Two Break connection provided on the secondary side of
Point 122_{twenty one}, 122_{twenty two}And the break contact 122
_{twenty one}, 122_{twenty two}Neutral contact 123 corresponding to_{twenty one}, 123_{twenty two}Is
Unbalance-balance converter (U / B) 124_0SEquilibrium
Connected to output. Balance-unbalance converter (B / U) 12
4_0RIs connected to the input of the line alarm detection unit 125,
The output of the line alarm detection unit 125 is output to the failure diagnosis processing unit 12.
6 is connected to the first input. Neutral contact 123 ₁₁, 12
3₁₂The break contacts 122₁, 122_TwoWhen
Pair make contact 127₁₁, 127₁₂Are
Leh 121_Three Contact 122 provided on the secondary side of the
₃₁, 122₃₂Connected to. Break contact 122₃₁, 1
22₃₂And make contact 127₃₁, 127₃₂And each pair
Corresponding neutral contact 123₃₁, 123 ₃₂Is the equilibrium-unbalance change
Replacement unit (B / U) 124_1RConnected to the corresponding balanced input of
You. Balance-unbalance converter (B / U) 124_1ROutput is late
Connected to the second input of the fault diagnosis processing unit 126,
The first output of the diagnostic processing unit 126 is a relay 121₁ Primary
Connected to the side. Second output of failure diagnosis processing unit 126
Is the relay 121_Two, 121_ThreeIs connected to the primary side.

In the conventional example having such a configuration, the transmission device 1
_012, when recognizing that it is determined whether or not a carrier signal has been received correctly via the transmission path 102 ₂ as a result of the determination is false, as indicated by a dotted line in FIG. 9, this fact the "remote station alarm" indicating sent toward the transmission line 102 _2. The transmission device 104 ₂ , the highway 103 and the transmission device 104 ₁ are operated by an operator different from the operator of the transmission devices 101 ₁ and 101 ₂ , so that the transmission path 102 ₁ without processing any “game alarm”. giving the transmission device 101 ₁ via the (FIG. 11 (1)).

In the transmission device 101 ₁ , the line alarm detection unit 1
15 is a downlink 102 _1d , a break contact 11
2 _21, 112 _22, neutral contact 113 _21, 113 ₂₂ and balance - via the unbalanced conversion unit (B / U) 114 _0R received such a "remote station alarm", and provides the failure diagnosis process unit 116. When recognizing the “game alarm”, the failure diagnosis processing unit 116 performs a failure diagnosis process based on the following procedure, even though no failure has occurred in the game (that is, the transmission device 104 ₁ ).

(1) By driving the relay 111 ₁ , the neutral contacts 113 ₁₁ and 113 ₁₂ and the make contact 11
7 _11, 117 ₁₂ via the balanced - unbalanced to balanced input unbalanced conversion unit 114 _1R - connecting the balanced output of balance conversion section 114 _0S (FIG. 11 (2)). (2) In such a state, the unbalanced-balanced conversion unit 114
_{From 0S} to neutral contacts 113 ₁₁ and 113 ₁₂ , make contact 117
_A signal _supplied via ₁₁ , 117 ₁₂ and the balance-unbalance converter 1141R is fetched, and it is determined whether or not the signal is normal.

(3) If the result of the determination is true,
Unbalanced - balanced converting unit 114 _0S and equilibrium - transmission line interface working including unbalanced conversion unit 114 _0R are rambling driving the relay 111 ₁ determines that the normal (11
(3)) and terminate the failure diagnosis processing. It should be noted that the procedure of the diagnostic processing and the method of switching to the spare transmission line interface when the result of such determination is false are not directly related to the present invention, and therefore the description thereof is omitted here.

Further, the transmission device 101₁ So, as mentioned above
As relay 111₁ Complains during the period when
Balance-balance converter 114_0STo neutral contact 113₁₁, 113
₁₂And break contact 112₁₁, 112₁₂Going up through
Link 102_1uThere is no path leading to
(Four)). Also, the transmission device 104₁ Then, the line alarm detector 1
25 is a break contact 122 ₁₁, 122₁₂, Neutral contact 1
23₁₁, 123₁₂And the balance-unbalance conversion unit 124_0RTo
If the signal is not received through the communication (FIG. 11 (5)),
This is notified to the failure diagnosis processing unit 126. Failure diagnosis
When the management unit 126 recognizes such a notification, the following processing is performed.
The failure diagnosis process is performed based on the order.

(1) By driving the relays 121 ₂ and 121 ₃ , the connection between the uplink 102 _{1 u} and the unbalanced-balanced converter 124 _OS is released (FIG. 11 (6)). The upstream link 102 _1u is connected to the balanced-unbalanced converter 124 _1R via the contacts 127 ₃₁ and 127 ₃₂ . (2) make contact 127 ₃₁ from the upstream link 102 _1u in such a state, 127 _32, neutral contact 123 _31, 1
23 ₃₂ and balance - captures the signal supplied via the unbalanced conversion unit 124 _1R, the signal is judged whether it is normal.

(3) If the result of the determination is false,
Unbalanced-balanced converter 124 _0S , balanced-unbalanced converter 12
Transmission line interface working including 4 _0R is determined to be not normal, the equilibrium in place of the transmission interface - failure diagnosis process performs control to provide the working transmission path interface spare containing unbalanced conversion unit 124 _1R Is completed (FIG. 11 (7)).

[0015]

As described above, in the above-described conventional example, while the relay 111 ₁ is being driven,
The transmission device 101 ₁ activates useless failure diagnosis processing in response to a game alarm resulting from a failure that has occurred at any location other than the adjacent transmission device 104 ₁ via the transmission line 102 ₁ .
Further, the transmission apparatus 104 ₁ erroneously recognizes that a failure has occurred in the normal transmission path interface, so that the actual failure of the transmission path 102 ₂ cannot be accurately grasped and adapts to the failure. The maintenance and operation procedures to be performed were sometimes confused.

An object of the present invention is to provide a failure diagnosis method which can avoid unnecessary activation of failure processing under minor changes in hardware.

[0017]

FIG. 1 is a block diagram showing the principle of the first aspect of the present invention.

According to the first aspect of the present invention, a full-duplex system is suitable.
Installed on the transmission path used for transmission and reception via the transmission path.
Relay node device 11 for relaying transmission information to be
Two interfaces with the transmission line based on the long system
Transmission line interface 12 ₁, 12_TwoAnd relay
The transmission information is transmitted to the node 11 via the transmission path.
Receiving node device 13, and the relay node device 11.
Is received as transmission information from the preceding transmission section of the transmission path.
Occurred in the transmission section that precedes the transmission section
A fault information relay that relays fault information indicating a fault
Step 14, if the transmission information is successfully received via the transmission path
And if the result of the determination is false
Failure processing means 15 for starting predetermined failure processing;
And the node device 13 indicates transmission information in a pseudo manner.
Pseudo information generating means 16 for generating pseudo information;
The fault information relayed by the relay unit 14 has been received.
And if the result of the determination is true, 2
Transmission line interface 12₁, 12_TwoAnd transmission path
Connection, and of these transmission line interfaces,
The loop check of the one currently used is reserved.
Go to and use the one adapted to the result
Loop check means 17 and loop check means 17
During the loop check, the pseudo information generating means 16
Therefore, the generated pseudo information is transmitted to the transmission path as transmission information.
And pseudo information sending means 18 for outputting the information.
You.

FIG. 2 shows the principle of the present invention.
It is a block diagram. The invention according to claim 2 is a full-duplex method.
Is installed on the transmission line to which the equation is applied, and through the transmission line
A relay node device 11 for relaying transmission information transmitted and received;
Interface with transmission line based on standby redundancy
Two transmission line interfaces 12 ₁, 12_TwoHave
To the relay node 11 via the transmission path.
A node device 13 for sending and receiving a report.
11 is the transmission information from the preceding transmission section of the transmission path
Received and generated in the transmission section that precedes the transmission section
In the fault information that relays the fault information indicating the same fault
The transmission information is normally received through the transmission path.
Is determined, and if the result of the determination is false
Fault processing means 1 for starting a predetermined fault process
5 and the node device 13 includes the fault information relay unit 14
Determines whether the relayed fault information has been received
When the result of the determination is true,
Interface 12₁, 12_TwoAnd disconnect from the transmission line,
Of these transmission line interfaces,
Loop check of what is done through the spare
Loop check to use one of the
Check means 17 and loop check means 17
To the working transmission line interface during the
Transmitted to the transmission line via the transmission line interface.
Alternative transmission information that sends transmission information to be transmitted to the transmission path
Transmission means 21.

The invention according to claim 3 is the invention according to claim 2.
In the failure diagnosis method of the above, the alternative transmission information sending means 21
Indicates that a spare transmission line interface is provided.
Sign. FIG. 3 is a block diagram showing the principle of the present invention.
FIG. In the invention described in claim 4, a full-duplex system is suitable.
Installed on the transmission path used for transmission and reception via the transmission path.
Relay node device 11 for relaying transmission information to be
Two interfaces with the transmission line based on the long system
Transmission line interface 12 ₁, 12_TwoAnd relay
The transmission information is transmitted to the node 11 via the transmission path.
Receiving node device 13, and the relay node device 11.
Is received as transmission information from the preceding transmission section of the transmission path.
Occurred in the transmission section that precedes the transmission section
A fault information relay that relays fault information indicating a fault
Step 14, if the transmission information is successfully received via the transmission path
And if the result of the determination is false
Failure processing means 15 for starting predetermined failure processing;
The node device 13 is connected to the fault information relay
To determine whether the relayed fault information has been received.
When the result of the determination is true, two transmission path interfaces
Face 12₁, 12_TwoDisconnect the connection with the transmission line, and
Of these transmission line interfaces, those currently used
Perform a loop check on the spare
A loop checker that uses one of the two that matches the result of
The stage 17 and the loop check means 17 perform a loop check.
In the period during which the link is
Return path forming means 4 for forming a return path between them
1 is provided.

In the fault diagnosis system according to the first aspect of the present invention, the fault information relay means 14 provided in the relay node device 11 transmits fault information indicating a fault occurring in a preceding transmission section of the transmission path to the transmission information. , And relays the fault information to the subsequent transmission section. On the other hand, in the node device 13 having _two transmission line interfaces 12 ₁ and 12 ₂ which face such a relay node 11 via the above-described transmission line, and take an interface with the transmission line based on the standby redundancy system. , The pseudo information generating means 16 generates pseudo information that indicates transmission information in a pseudo manner. Further, the loop check means 17 determines whether or not the above-described fault information has been relayed by the fault information relay means 14, and when the result of the determination is true, the two transmission path interfaces 12 ₁ and 12 ₂ The connection with the transmission line is released, and among these transmission line interfaces, the loop check of the currently used one is performed through the spare one, and one of the transmission line interfaces adapted to the result of the loop check is used currently. .

Further, during the period when the loop checking means 17 performs such a loop check, the pseudo information sending means 18 substitutes the pseudo information generated by the pseudo information generating means 16 in place of the currently used transmission line interface. Is transmitted to the transmission path as transmission information.

In the relay node device 11, the failure processing means 1
5 determines whether or not the transmission information is normally received via the transmission path. During the loop check, pseudo information replacing the transmission information is transmitted via the transmission path as described above. Since it is received, unnecessary trouble processing is not activated due to the trouble described above. The failure diagnosis method according to the second aspect of the present invention differs from the first aspect in that the pseudo information generation means 16 is not provided, but the loop check means 17 performs a loop check in the same manner, The transmission information transmitting means 21 transmits the transmission information to be transmitted to the transmission line via the transmission line interface to the transmission line instead of the working transmission line interface during the loop check.

That is, in the relay node device 11, the failure processing means 15 determines whether or not the transmission information is normally received via the transmission path. Since the transmission information is reliably received via the transmission path, unnecessary trouble processing is not activated due to the above-mentioned trouble. The operation of the fault information relay means 14 provided in the relay node device 11 is the same as that of the first aspect of the present invention, and a description thereof will be omitted.

In the failure diagnosis system according to the third aspect of the present invention, since the alternative transmission information sending means 21 is provided in the spare transmission line interface, the alternative transmission information sending means 21 is provided in the working transmission line interface to be replaced by the spare transmission line interface. As compared with the case where the alternative transmission information sending unit 21 is provided, the possibility that the failure processing unit 15 activates unnecessary failure processing is reduced.

The fault diagnosis system according to the fourth aspect of the present invention differs from the first aspect in that the pseudo information generating means 16 is not provided.
7 performs a loop check in the same manner, and the return path forming means 41 performs the loop check during the loop check.
A return path is formed between the upstream link and the downstream link of the transmission path.

That is, during such a period, the relay node device 11 provides the transmission information relayed to the downlink via the return path and the uplink, so that the failure processing unit 15 Unnecessary failure processing will not be activated due to the failed failure. The operation of the fault information relay means 14 provided in the relay node device 11 is the same as that of the first aspect of the present invention, and a description thereof will be omitted.

[0028]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 4 is a diagram showing an embodiment corresponding to the first aspect of the present invention. In the drawing, components having the same functions and configurations as those shown in FIG. 10 are denoted by the same reference numerals, and description thereof is omitted here.

The feature of this embodiment is that the transmission device shown in FIG.
Place 101₁ Transmission device 101 provided in place of_1aIn
These transmission devices 101_1a, 101₁ Configuration differences
The point is that the primary side is the relay 111₁ Connected in parallel with the primary side of
Relay 111_1aAnd the relay 111_1aof
Secondary make contact 117_1a, 117_2aAnd neutral contact 11
3_1a, 113_2aAre uplink 102_1uAnd not
Balance-balance converter 114 _a Connected to the balanced output of
Unbalance-balance converter 114_a Send fixed pattern to input
The point is that the output of the output unit 61 is connected.

[0030] As to the correspondence relationship between the block diagram shown in the embodiment of FIG. 1, the transmission apparatus 104 ₁ shown in FIGS. 9 and 10 to the relay node apparatus 11, fault information relay unit 14 and the fault handler 15 Correspondingly, the two transmission line interfaces shown in FIG.
2 _1, 12 ₂ in response, the transmission device 101 _1a the node device 1
3, the line alarm detection unit 125 and the failure diagnosis processing unit 126 shown in FIG. 10 correspond to the failure processing unit 15, the fixed pattern sending unit 61 corresponds to the pseudo information generation unit 16, and the failure diagnosis processing unit 116 and The relay 111 ₁ corresponds to the loop check unit 17, and the relay 111 _a and the unbalanced-balanced conversion unit 114 _a correspond to the pseudo information sending unit 18.

The present embodiment will be described below with reference to FIGS.
The operation of the embodiment will be described. The fixed pattern sending unit 61
Balance-balance converter 114_0STo neutral contact 113 ₁₁, 11
3₁₂And break contact 112₁₁, 112₁₂Through on
Link 102_1UAlmost equivalent to the signal sent to
A pseudo signal is constantly generated. Failure diagnosis processing unit 116
Performs fault diagnosis processing based on the same procedure as the conventional example,
In the course of the fault diagnosis process, the relay 111₁ Drives
In parallel with the period of the relay 111_a Is driven.
Therefore, the above-described pseudo signal is transmitted to the neutral contact 113._1a,
113_2aAnd make contact 117_1a, 117_2aThrough
Uplink 102_1uSent to

That is, even if the path between the neutral contacts 113 ₁₁ , 113 ₁₂ and the break contacts 112 ₁₁ , 112 ₁₂ is cut, the line alarm detection unit 125 mounted on the transmission device 104 ₁ detects the above-mentioned pseudo signal. It will continue to be received,
The failure diagnosis processing unit 126 does not activate unnecessary failure diagnosis processing as in the conventional example. Therefore, the transmission device 10
4 ₁ can continue to operate while applied consistently a transmission path interface is normal working.

[0033] In the present embodiment, although the detailed format of the signal to be generated by the fixed pattern transmitting unit 61 is not described, it recognizes that a state in which the signal in the transmission device 104 ₁ is not received Can be of any level, timing or any other form, provided that is avoided. FIG. 5 is a diagram showing an embodiment corresponding to the second aspect of the present invention.

The difference in configuration between the present embodiment and the embodiment shown in FIG. 4 is not provided with a fixed pattern transmitting unit 61, and an unbalanced - parallel to the input of input 114 _0S equilibrium conversion unit 114 _a At the connected point.

[0035] As to the correspondence relationship between the block diagram shown in this embodiment and FIG. 2, the transmission apparatus 104 ₁ shown in FIGS. 9 and 10 correspond to the relay node apparatus 11 and failure information relay unit 14, FIG. 5 10 correspond to the transmission line interfaces 12 ₁ and 12 ₂ , the transmission device 101 _1a corresponds to the node device 13, and the line alarm detection unit 125 and the failure diagnosis processing unit 126 shown in FIG. The fault diagnosis processing unit 116 and the relay 111 ₁ correspond to the loop check unit 17.
Relay 111 _a and unbalanced - balanced converting unit 114 _a corresponds to the alternative transmission information transmitting unit 21.

The operation of this embodiment will be described below with reference to FIGS. Unbalanced-balanced converter 114 _a ,
The signal to be transmitted to the uplink 102 _1U is given in parallel to 114 _0S . Failure diagnosis process unit 116 performs the fault diagnosis processing on the basis of the same procedure as the conventional example, the relay 111 _a is driven in parallel in the period in which the relay 111 ₁ is driven in the course of the disorder diagnosis processing. Therefore, the above-mentioned signals are converted into unbalanced-balanced conversion units 114 _a ,
Neutral contacts 113 _1a and 113 _2a and make contact 11
It is transmitted to the uplink _1021u via 7 _1a and 117 _2a .

That is, even if the path between the neutral contacts 113 ₁₁ , 113 ₁₂ and the break contacts 112 ₁₁ , 112 ₁₂ is cut, the line alarm detection unit 125 mounted on the transmission device 104 ₁ is different from the conventional example. Since a state in which no signal is received is not detected, the failure diagnosis processing unit 126 does not activate unnecessary failure diagnosis processing. Therefore, the transmission device 104
₁ can continue the operation while continuously applying the normal working transmission line interface.

In each of the embodiments described above, the unbalance-
Although balance conversion section 114 _a is provided in the transmission line interface portion of the working, the present invention is not limited to such a configuration, for example, it provided separately in both the transmission line interface portion of the working and spare The hardware configuration may be standardized or provided without being integrated with any of these transmission line interfaces.

FIG. 6 is a diagram showing an embodiment corresponding to the third aspect of the present invention. Differences of the configuration of the embodiment shown in the present embodiment and FIG. 4, the fixed pattern transmitting unit 61 and the unbalanced - not provided with balance conversion section 114 _a, break contact 112 _1a, 112 _2a respectively make contact 11
7 ₂₁ , 117 ₂₂ and the neutral contacts 113 _1a , 113
_2a is unbalanced - connected to the balanced output of the balanced converting unit 114 _1S, unbalanced - input balance conversion section 114 _1S is in that connected in parallel to an input of 114 _0S.

[0040] As to the correspondence relationship between the block diagram shown in this embodiment and FIG. 2, the transmission apparatus 104 ₁ shown in FIGS. 9 and 10 correspond to the relay node apparatus 11 and failure information relay unit 14, FIG. 6 10 correspond to the transmission line interfaces 12 ₁ and 12 ₂ , the transmission device 101 _1a corresponds to the node device 13, and the line alarm detection unit 125 and the failure diagnosis processing unit 126 shown in FIG. The fault diagnosis processing unit 116 and the relay 111 ₁ correspond to the loop check unit 17.
Relay 111 _a corresponds to the alternative transmission information transmitting unit 21.

The operation of this embodiment will be described below with reference to FIGS. The unbalanced-balanced conversion unit _1141S and the balanced-unbalanced conversion unit _1140S have an uplink 1
The signal to be transmitted to 02 _1U is given in parallel. The failure diagnosis processing unit 116 performs a failure diagnosis process based on the same procedure as in the conventional example, and during the failure diagnosis process, the relay 11 _1
1a is driven. Therefore, the above-mentioned signal is transmitted to the up link 102 _1u via the unbalance-balance converter 114 _1S , the neutral contacts 113 _1a and 113 _2a and the make contacts 117 _1a and 117 _2a .

On the other hand, during the period when the relay 111 ₁ is not driven, the output of the unbalance-balance converter 114 _1S outputs the neutral contacts 113 _1a , 113 _2a and the break contacts 11 _1a .
Make contact 117 ₂₁ through a 2 _1a, 112 _2a, 117 ₂₂
, A circuit similar to the circuit in the embodiment corresponding to the first and second aspects of the present invention is formed. That is, the neutral contacts 113 ₁₁ and 113 ₁₂ and the break contact 1
Even if the path between 12 ₁₁ and 112 ₁₂ is disconnected, the line alarm detection unit 125 mounted on the transmission device 104 ₁ does not detect a state in which no signal is received as in the conventional example, so the failure diagnosis processing unit 126 Does not activate useless failure diagnosis processing.

Therefore, the transmission device 104 ₁ can continue the operation while continuously applying the normal working transmission line interface. In the present embodiment,
Relay 111 _a is provided in the transmission line interface portion of the preliminary, but the present invention is not limited to such a configuration,
For example, they may be separately provided in both the working and protection transmission line interface units to standardize the hardware configuration, or may be provided without being integrated with any of these transmission line interfaces.

FIG. 7 corresponds to the fourth aspect of the present invention.
It is a figure showing a first embodiment. In this embodiment and FIG.
The difference between the configuration and the conventional example shown in FIG.
₁ 111 connected in parallel to the primary side of_a Equipped
The relay 111_aBreak on the secondary side of
Contact 112_1a, 112_2aAnd neutral contact 113_1a, 11
3_2aIs the downlink 102_1dAnd break connection
Point 112_{twenty one}, 112_{twenty two}Connected to, furthermore, in these
Standing contact 113_1a, 113_2aBreak contact 112
_1a, 112_2aMake contact 117 paired with_1a, 11
7_2aIs the break contact 112₁₁, 112₁₂Together with the uphill
Link 102_1uAt a point connected to

[0045] As to the correspondence relationship between the block diagram shown in this embodiment and FIG. 3, the transmission apparatus 104 ₁ shown in FIGS. 9 and 10 correspond to the relay node apparatus 11 and failure information relay unit 14, FIG. 4 10 correspond to the transmission line interfaces 12 ₁ and 12 ₂ , the transmission device 101 _1a corresponds to the node device 13, and the line alarm detection unit 125 and the failure diagnosis processing unit 126 shown in FIG. The fault diagnosis processing unit 116 and the relay 111 ₁ correspond to the loop check unit 17.
Relay 111 _a corresponds to the folded path forming means 41.

The operation of this embodiment will be described below with reference to FIGS. 7 and 10. Failure diagnosis process unit 116 performs the fault diagnosis processing on the basis of the same procedure as the conventional example, the relay 111 _a is driven in parallel in the period in which the relay 111 ₁ is driven in the course of the disorder diagnosis processing. Therefore, during such a period, signals received from the transmission device 104 ₁ via the downlink 104 _1d are transmitted to the break contacts 112 _1a and 112 _2a , the neutral contacts 113 _1a and 113 _2a and the make contacts 117 _1a and 117 _2a. And transmitted to the uplink _1021u via

On the contrary, during the period when the relay 111 ₁ is not driven, the down link 104 _1d is connected to the break contacts 112 _1a , 112 _2a , the neutral contacts 113 _1a , 113 _2a ,
Break contacts 112 ₂₁ , 112 ₂₂ and neutral contact 11
Since it is connected to the input of the balanced-unbalanced converter _1140R via 3 ₂₁ and 113 ₂₂ , a circuit similar to the conventional example is formed.

That is, in the transmission device 104 ₁ , even if the path between the neutral contacts 113 ₁ and 113 ₂ and the break contacts 112 ₁ and 112 ₂ is disconnected, the signal is continuously received from the transmission device 101 ₁ . The failure diagnosis processing unit 126 does not activate useless failure diagnosis processing unlike the conventional example.
Therefore, the transmission device 104 ₁ can continue the operation while continuously applying the normal working transmission line interface.

FIG. 8 is a diagram showing a second embodiment corresponding to the fourth aspect of the present invention. The difference between the present embodiment and the embodiment shown in FIG.
14 inputs _a is unbalanced - not the input of the balance conversion section 114 _0S, equilibrium - in that connected to the output of the unbalanced conversion unit 114 _0R.

Hereinafter, the present embodiment will be described with reference to FIGS.
The operation of the embodiment will be described. Unbalance-balance converter 114_a To
Is the transmission device 104₁ Downlink 102 from _1d, Blur
Work contact 112_{twenty one}, 121_{twenty two}, Neutral contact 113_{twenty one}, 11
3_{twenty two}And the balance-unbalance conversion unit 114_0RReceived via
Signal is given. The failure diagnosis processing unit 116 is a conventional example
Diagnosis processing is performed based on the same procedure as
During the diagnostic processing, the relay 111₁ Is driven
In parallel between the relay 111_a Is driven. Accordingly
Thus, the above-mentioned signal is converted into an unbalanced-balanced_a , Neutral
Contact 113_1a, 113_2aAnd make contact 117_1a, 1
17_2aUplink 102 via_1uSent to

That is, even if the path between the neutral contacts 113 ₁ , 113 ₂ and the break contacts 112 ₁ , 112 ₂ is disconnected, the line alarm detector 12 mounted on the transmission device 104 ₁
In _No. 5, since the signal is received from the transmission device 1011, the failure diagnosis processing unit 126 does not activate unnecessary failure diagnosis processing as in the conventional example. Therefore, the transmission device 104 ₁
Can continue the operation while continuously applying the normal working transmission line interface. Furthermore, in the present embodiment, not directly connected uplink link 102 _1u and downlink link 102 _1d, unbalanced - because they are connected via a balance conversion section 114 _a, as compared to the embodiment shown in FIG. 7,
Diagnosis is made stably as to whether the current transmission interface unit is normal while absorbing deviations in impedance and level diagram between these links.

In each of the above embodiments, the transmission path 1
Although 02 ₁ is formed as a balanced metallic transmission line, the present invention is not limited to such a transmission line, and may be, for example, a wireless transmission line or an optical transmission line. Further, in each of the above-described embodiments, the transmission method applied to such a transmission path and the configuration of the transmitted frame are not described at all, but the present invention is not limited to the above-described game alarm. It can be applied to any transmission scheme and frame configuration as long as it can be transmitted at the receiving end and reliably separated at the receiving end.

[0053] Further, in the above embodiments, although the relay to changes in connection with the up link 102 _1u and downlink link 102 _1d is applied in the transmission device 101 _1, the present invention is such a construction The invention is not limited thereto, and a semiconductor switch or any other element may be applied as long as the insertion loss is small enough to be acceptable and the impedance matching with the transmission line is maintained.

Further, in each of the above-described embodiments, a microprocessor is applied as the failure diagnosis processing unit 116. However, the present invention is not limited to such a configuration, and some of the functions realized by the microprocessor are used. Alternatively, all may be realized by hardware.

[0055]

As described above, according to the first to fourth aspects of the present invention, the failure processing is unnecessarily activated due to the failure information relayed by the own station in the relay node device without changing the software. Is avoided.

Therefore, in the transmission system to which these inventions are applied, the environment and efficiency of the work related to maintenance and operation can be surely improved without significantly increasing the cost.

[Brief description of the drawings]

FIG. 1 is a principle block diagram of the invention according to claim 1;

FIG. 2 is a principle block diagram of the invention according to claims 2 and 3;

FIG. 3 is a principle block diagram of the invention according to claim 4;

FIG. 4 is a diagram showing an embodiment corresponding to the invention described in claim 1;

FIG. 5 is a diagram showing an embodiment corresponding to the invention described in claim 2;

FIG. 6 is a diagram showing an embodiment corresponding to the invention described in claim 3;

FIG. 7 is a diagram showing a first embodiment corresponding to the invention described in claim 4;

FIG. 8 is a diagram showing a second embodiment corresponding to the invention described in claim 4;

FIG. 9 is a diagram illustrating a configuration example of a transmission system to which a conventional failure diagnosis method is applied.

FIG. 10 is a diagram illustrating a configuration of transmission apparatuses 101 ₁ and 104 ₁ .

FIG. 11 is an operation timing chart of a conventional example.

[Explanation of symbols]

Reference Signs List 11 relay node device 12 transmission line interface 13 node device 14 fault information relay means 15 fault processing means 16 pseudo information generating means 17 loop check means 18 pseudo information sending means 21 alternative transmission information sending means 41 return path forming means 61 fixed pattern sending section 101,104 transmission device 102 transmission path 103 highway 111 and 121 relay 112 122 break contact 113 and 123 neutral contacts _{114 0S, 114 1S, 114 a} , 124 0S, 124 1S
Unbalanced-balanced conversion units (U / B) 114 _0R , 114 _1R , 124 _0R , 124 _1R Balanced-unbalanced conversion units (B / U) 115, 125 Line alarm detection units 116, 126 Failure diagnosis processing units 117, 127 Make contact

Claims (4)

[Claims] 1. A relay node device interposed in a transmission line to which a full-duplex system is applied and relaying transmission information transmitted / received via the transmission line, and a relay node device based on a standby redundancy system. A node device that has two transmission line interfaces that take an interface, and that transmits and receives the transmission information while facing the relay node via the transmission line, wherein the relay node device precedes the transmission line. Fault information relay means, which is received as the transmission information from a transmission section, and sets fault information indicating a fault that has occurred in a transmission section preceding the transmission section as an object of the relay, and wherein the transmission information is transmitted via the transmission path. Failure processing means for determining whether or not the information is normally received, and activating a predetermined failure processing when the result of the determination is false, the node device comprising: Pseudo-information generating means for generating pseudo-information indicating the pseudo-information, determining whether or not the fault information relayed by the fault information relay means has been received, and when the result of the determination is true, The connection between the two transmission line interfaces and the transmission line is released, and of these transmission line interfaces, a loop check of the one currently used is performed through a spare one, and one of them is adapted to the result. A loop check unit to be used currently; and a pseudo information transmitting unit that transmits the pseudo information generated by the pseudo information generating unit to the transmission path as the transmission information during a period in which the loop check unit performs the loop check. A failure diagnosis method characterized by the following. 2. A relay node device interposed in a transmission line to which a full-duplex system is applied and relaying transmission information transmitted and received through the transmission line, and a relay node device based on a standby redundancy system. A node device that has two transmission line interfaces that take an interface, and that transmits and receives the transmission information while facing the relay node via the transmission line, wherein the relay node device precedes the transmission line. Fault information relay means, which is received as the transmission information from a transmission section, and sets fault information indicating a fault that has occurred in a transmission section preceding the transmission section as an object of the relay, and wherein the transmission information is transmitted via the transmission path. Failure processing means for determining whether or not the information is normally received, and activating a predetermined failure processing when a result of the determination is false, the node device comprising: It is determined whether or not the fault information relayed by the relay means has been received. If the result of the determination is true, the connection between the two transmission path interfaces and the transmission path is released, and the transmission Loop check means for performing a loop check of a service interface which is currently used through a spare one and providing one of the route interfaces adapted to the result, to a work interface, during a period in which the loop check means performs the loop check Fault diagnosis, comprising: a substitute transmission information transmitting means for transmitting transmission information to be transmitted to the transmission path via the transmission path interface to the transmission path in place of the working transmission path interface. method. 3. The fault diagnosis system according to claim 2, wherein said alternative transmission information sending means is provided in a spare transmission line interface. 4. A relay node device interposed in a transmission line to which a full-duplex system is applied and relaying transmission information transmitted / received via the transmission line, and a relay node device based on a standby redundancy system. A node device that has two transmission line interfaces that take an interface, and that transmits and receives the transmission information while facing the relay node via the transmission line, wherein the relay node device precedes the transmission line. Fault information relay means, which is received as the transmission information from a transmission section, and sets fault information indicating a fault that has occurred in a transmission section preceding the transmission section as an object of the relay, and wherein the transmission information is transmitted via the transmission path. Failure processing means for determining whether or not the information is normally received, and activating a predetermined failure processing when a result of the determination is false, the node device comprising: It is determined whether or not the fault information relayed by the relay means has been received. If the result of the determination is true, the connection between the two transmission path interfaces and the transmission path is released, and the transmission Loop check means for performing a loop check of a service interface which is currently used through a spare one and providing one of the route interfaces adapted to the result, to a work interface, during a period in which the loop check means performs the loop check And a return path forming means for forming a return path between an upstream link and a downstream link of the transmission path.