JPH05175945A - Instantaneous disconnection communication processing unit disconnection method - Google Patents

Abstract

(57) [Abstract] [Purpose] It is an object of the present invention to provide a communication data processing unit disconnection method of no interruption and no interruption for fault torrent and no interruption communication in a communication device. [Structure] A signal distribution unit 1 for distributing input data into a plurality of data of the same level, a plurality of communication data processing units 2-1 to 2-n for receiving the distribution data, and the communication data processing unit 2-. The data from 1 to 2-n are input, and the comparison / selection unit 3 that determines whether the input data is normal or abnormal and selects the data for the next stage, and the data from the comparison / selection unit 3 is input, and communication is performed. A signal multiplex unit 4 for performing multiplex processing to be one of the data output from the data processing units 2-1 to 2-n is provided.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to fault torrent and uninterrupted communications in communication devices. In recent years, communication networks have been constructed in various fields, and the suspension of operations and instantaneous interruptions of the networks pose a life and death problem. For this reason, there is a social demand for higher reliability and fault torrenting of networks.

[0002]

2. Description of the Related Art A conventional example will be described below with reference to FIG. In the figure, 101 is a communication data processing unit of the active system, and 102 is a communication data processing unit of the standby system.

Reference numeral 103 is a switch for switching between the communication data processing unit 101 of the active system and the communication data processing unit 102 of the standby system. To improve the reliability and fault torrent of conventional communication networks, the communication data processing units 101 and 102 duplicate the data processing, one communication data processing unit 101 is used during operation, and the other communication data processing unit 102 is operated. It exists as a backup in case of system failure and is normally in a standby state, and the switch from the active system to the backup system is performed by the switch 103.

[0004]

Therefore, in the duplex configuration method of the conventional example, since the failure detection of the active system is confirmed by the abnormality of the downstream communication data processing unit, the communication failure has already occurred at the time of switching to the standby system. Therefore, uninterrupted communication cannot be realized. When a failure occurs and the system is switched to the standby system, it is difficult to identify the location of the failure because the communication state has changed from the previous operating state. In addition, since the inputs are commonly used for preventive maintenance of the active system and the standby system, it is easy to cause signal errors in the commonly used parts when performing replacement during operation, and it is not possible to replace without causing communication errors. There is a problem that you cannot do it.

It is an object of the present invention to provide a communication data processing unit disconnection system that does not cause any interruption or interruption.

[0006]

In order to achieve the above object, according to the present invention, a signal distributor 1 for distributing input data into a plurality of data of the same level, and a plurality of communication data processing for receiving the distributed data. Input the data from the units 2-1 to 2-n and the communication data processing units 2-1 to 2-n,
A comparison / selection unit 3 that determines whether the input data is normal or abnormal and selects the data for the next stage, and the data from the comparison / selection unit 3 is input and output from the communication data processing units 2-1 to 2-n. The signal multiplex unit 4 for performing multiplex processing so that the data becomes one of the data to be generated.

[0007]

According to the present invention, as shown in FIG. 1, the signal distribution unit 1 distributes input data into a plurality of data of the same level, and the reception processing of the plurality of distributed data is performed by a plurality of communication data processing units.
2-1 to 2-n and then, in addition to the comparison / selection unit 3, it is determined whether the plurality of distribution data are normal or abnormal, and the data output from the signal multiplexing unit 4 is the communication data processing unit 2-. 1
Multiple processing is performed so that it becomes one of the data output from ~ 2-n.

Therefore, it is possible to perform a disconnection / interruption disconnection process for a plurality of data.

[0009]

Embodiments of the present invention will be described in detail below with reference to FIGS. FIG. 2 is a diagram showing a circuit of an embodiment of the present invention, which is an example in which the circuit is formed to have two signal paths. 3 to 8 show the details of FIG.

In FIG. 2, input data from the preceding data processing system is added to the signal distribution unit 1 and distributed by the signal distribution circuit 10 into two data, and the distributed data is divided into two synchronization protection circuits 11a and 11b in the next stage. In addition to the above, whether or not each of the distribution data is correct is determined based on the presence or absence of synchronization establishment. Then, the data from the synchronization protection circuits 11a and 11b which have been established in synchronization are input to the communication data processing units 2-1 and 2-2 to be converted into two parallel data, and the parallel data are input to the comparison and selection unit 3. To do.

The two parallel data sent from the communication data processing units 2-1 and 2-2 to the comparison / selection unit 3 have a phase difference due to the difference in the lengths of the transmission paths. As a countermeasure against this, the phase adjustment of the data is performed by the phase adjustment memories 30a and 30b.

As the procedure of this phase adjustment, the data of the communication data processing units 2-1 and 2-2 are first transferred to each phase adjustment memory 30.
Write to a, 30b. A certain value is the phase adjustment memory 30a,
At the time when the data is stored in 30b, the phase difference between the data is eliminated by simultaneously reading from the phase adjustment memories 30a and 30b.

Further, the data from the phase adjustment memories 30a and 30b is checked by a cyclic redundancy check (CRC) written in an error confirmation section in the data to determine whether each data is normal or abnormal. It is input to the check circuits 31a and 31b, and at the same time, it is sent to the signal multiplexing unit 4 in the next stage.

In the signal multiplexing unit 4, the CR in the comparison / selection unit 3 is
The valid / invalid control signal which is the judgment result of whether the data is normal or abnormal is received from the C check circuit 31a, 31b, and the output data from the phase adjustment memories 30a, 30b is output to the next stage by the valid / invalid control signal. Decide whether or not. Then, the output data from the signal multiplexer 4 is sent to the signal distributor 1 of the next stage data processing system.

As a result of the above, the communication data processing unit 2-1,
Even if any of 2-2 fails, it can be operated without being affected by the processing system, and CRC check circuits 31a, 31
Depending on b, which communication data processing unit 2-1,2-
You can judge whether it is 2.

Further, the communication data processing units 2-1, 2-2
If the reliability is a problem with the two units, the reliability can be further improved by increasing the number. 3 to 6 are diagrams showing specific examples of the comparison / selection unit 3.

In FIG. 3, each communication data processing unit
The plurality of data sent from 2-1 to 2-n are stored in the storage element 33a by the write clock from the write / read control circuits 32a to 32n.
To 33n, and read / write control from the write / read control circuits 32a to 32n is performed to absorb the phase difference between the data, and then the comparison / selection circuit 34 determines whether the data is valid or invalid. A determination is made and only normal data is sent to the signal multiplexer 4.

In FIG. 4, each communication data processing unit
The data sent from 2-1 and 2-2 are added to the majority decision circuit 35 and the majority decision selection circuit 36, and the comparison majority decision circuit 35 determines the most common one and determines that the result is valid data. In addition to the majority decision circuit 36, only valid data is sent to the signal multiplexer 4 and other data is not sent to the signal multiplexer 4 as invalid data.

In FIG. 5, each communication data processing unit
2-1-2-n is provided with a transmission data error confirmation part (CRC, parity check, etc.) on the transmission format in the plurality of data, and error confirmation part discrimination circuits 37a to 37n are provided to provide a plurality of data. It is determined whether or not the transmission data error confirmation portion in the transmission data error confirmation portion is incorrect, and as a result of the determination, only the correct data among the data transmitted from the respective communication data processing units 2-1-2-n are regarded as valid data and the comparison / selection circuit 38 is selected. The other data is invalidated by the comparison / selection circuit 38 as invalid data so as not to be transmitted to the signal multiplexor 4.

In FIG. 6, the input data is sent to the signal distributor 1
Each communication data processing unit 2-
Send to 1 to 2-6. Each communication data processing unit 2-1 ~
2-6 processes the input data from the signal distribution unit 1 and outputs it to the comparison / selection unit 3 in the next stage.

The inside of the comparison / selection unit 3 includes a first comparison circuit.
39a and a second comparison circuit 39b.
The comparison circuit 39a receives and compares the three data from the communication data processing units 2-1 to 2-3, and the comparison results are 2 units and 3 units in units of the communication data processing units 2-1 to 2-3. Only in the same case, the signal is output to the signal multiplexer 4.

The other second comparison circuit 39b receives the data from the communication data processing units 2-4 to 2-6 and compares them, and the comparison result is obtained in units of the communication data processing units 2-4 to 2-6. Only when the two devices and the three devices are the same, the signal is output to the signal multiplexer 4.

The signal multiplexer 4 inputs and multiplexes the output data from both the first comparison circuit 39a and the second comparison circuit 39b, and then sends them as one data output. In FIG. 7, the data sent from the comparison / selection unit 3 is written in the storage elements 40a-40n by the write control by the write clocks from the write / read control circuits 41a-41n, and written from the write / read control circuits 41a-41n. After the phase difference between the data is absorbed by the read control by the read clock, the multiplexing circuit 42 multiplexes the data to form one output data.

In FIG. 8, the optical signal from the optical transmission line 50a is input to the optical coupler 51a, which is branched into two, and the two branched optical signals are transmitted via the optical fiber 52 to the communication data processing unit.
Enter in 2-1, 2-2.

Each of the communication data processing units 2-1 and 2-2 includes
If the data from the optical fiber 52 is received and if the received data includes the data of the lower terminal of the next device, the terminal data selection unit
22a, 22b and the function of transmitting to the lower terminal via the signal multiplexing unit 41, and the transmission data from the lower terminal of the next device is processed by each communication data processing unit 2-1, 2-2, and the data selection unit
It has a function of sending to the optical transmission line 50b via 21a and 21b.

In each of the data selectors 21a and 21b, it is judged whether the input data from each of the communication data processing units 2-1 and 2-2 is normal or abnormal, and only the normal data is outputted to the optical multiplexer 51b.
The optical multiplexer 51b multiplexes the input optical data and outputs the multiplexed optical data to the optical transmission line 50b.

[0027]

As is apparent from the above description, according to the present invention, even if a communication data processing unit fails, operation can be performed without interruption and without interruption, and the communication data processing unit that has failed can be identified. You can

Further, even if active maintenance of the communication data processing unit in operation is carried out, communication is not disturbed, so that it is possible to realize fault tolerance and high reliability.

[Brief description of drawings]

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

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

FIG. 3 is a diagram showing a first example of a comparison / selection unit of the present invention.

FIG. 4 is a diagram showing a second example of a comparison / selection unit of the present invention.

FIG. 5 is a diagram showing a third example of a comparison / selection unit of the present invention.

FIG. 6 is a diagram showing a fourth example of a comparison / selection unit of the present invention.

FIG. 7 is a diagram showing an example of a signal multiplexing unit of the present invention.

FIG. 8 is a diagram showing a circuit of another embodiment of the present invention.

FIG. 9 is a diagram showing a circuit of a conventional example.

[Explanation of symbols]

1 is a signal distribution unit 2-1 to 2-n is a communication data processing unit 3 is a comparison / selection unit 4 is a signal multiplexing unit 10 is a signal distribution circuit 11a to 11n
Is a sync protection circuit 32a to 32n and 41a to 41n is a write / read control circuit 33a to 33n and 40a to 40n is a memory element 34,38 is a comparison selection circuit 35 is a comparison majority circuit 36 is a majority selection circuit 37a to 37n is an error Confirmation unit discrimination circuit 42 is a multiple circuit

Claims (6)

[Claims] 1. A signal distributor (1) for distributing input data into a plurality of data of the same level, a plurality of communication data processing units (2-1 to 2-n) for receiving the distributed data, A comparison and selection unit (3) for inputting data from the communication data processing unit (2-1 to 2-n), judging whether the input data is normal or abnormal, and selecting data for the next stage, and the comparison and selection unit A signal multiplexing unit (4) is provided for inputting data from the unit (3) and performing multiplex processing so that it becomes one of the data output from the communication data processing units (2-1 to 2-n). A method of disconnecting the communication processing unit without interruption. 2. A plurality of the input data are provided in the signal distributor (1) in order to identify which one of the plurality of communication data processing units (2-1 to 2-n) has failed. A signal distribution circuit (10) for distributing to the data and a plurality of synchronization protection circuits (11a to 11n) for providing a synchronization protection function to the data from the signal distribution circuit (10) and guaranteeing the input data are provided. The disconnection-free communication processing unit disconnection method according to claim 1. 3. The signal multiplexer (4) from a plurality of communication data processing units (2-1 to 2-n) in the comparison / selection unit (3).
Storage elements (33a to 33n) that perform phase absorption so that the phases of the data sent to
2. The non-instantaneous interruption according to claim 1, further comprising a comparison / selection circuit (34) for comparing valid data and invalid data of output data of (33a to 33n) and selecting and outputting only valid data. Communication processing unit separation method. 4. The signal multiplexer (4) from a plurality of communication data processing units (2-1 to 2-n) in the comparison / selection unit (3).
Of the data sent to, the comparison majority decision circuit (35) that determines the most common one as valid data, and the communication data processing unit (2-1 to 2-n) based on the determination result. 2. A majority decision selection circuit (36) for controlling whether the data to be sent is valid or invalid by majority decision and sends only valid data to the signal multiplexer (4). Non-instantaneous disconnection communication processing unit disconnection method. 5. The signal multiplexer (4) from a plurality of communication data processing units (2-1 to 2-n) in the comparison and selection unit (3).
For the data to be sent to the transmission data, the error confirmation unit discrimination circuit (37a to 37n) having a transmission data error confirmation function on the transmission format in the transmission data and discriminating whether or not the transmission data error confirmation portion is correct. And a comparison / selection circuit for controlling, based on the confirmation result, to send only the valid data being sent from the communication data processing unit (2-1 to 2-n) to the signal multiplexing unit (4). (38) is provided, Claim 1 characterized by the above-mentioned.
Uninterrupted communication processing unit disconnection method described. 6. A storage element (40a to 40n) for absorbing a phase variation of a plurality of valid data output from the comparison and selection section (3) in the signal multiplexing section (4), and the storage element (40a). ~ 40
(4) Multiplexing circuit that multiplexes multiple phase absorption data from
2. The disconnection-free communication processing unit disconnection method according to claim 1, characterized in that 2) is provided.