JP2972134B2 - Communication network system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication network system comprising a signal network to which a control node for storing subscriber data and the like and an exchange are connected.
The present invention relates to a communication network system capable of avoiding a system down due to a control node failure.

[0002]

2. Description of the Related Art In a conventional communication network system, one control node for storing subscriber data and the like is provided for each subscriber, and connection processing is performed based on the subscriber data and the like stored in the control node. And so on.

[0003]

In the conventional communication network system, since there is only one control node for each subscriber, when the control node goes down due to a failure, subscriber data and the like are stored in the control node. There is a problem that it is impossible to make and receive calls for a certain subscriber.

[0004] The present invention has been made in view of the above,
It is an object of the present invention to provide a communication network system in which a backup node that can replace a control node is provided to avoid a system down due to a failure of the control node and improve the reliability of the communication network.

[0005]

According to one aspect of the present invention, there is provided a communication network system having a signal network to which one or more control nodes and other devices are connected. A spare node connected to the signal network and having a function of substituting for the control node, the spare node storing storage means for storing programs and data of each control node, and a program for a control node to be substituted; The gist of the present invention is to include a spare node including an execution unit that selects data from the storage unit and executes the processing of the control node on the basis of the selected program and data.

According to the first aspect of the present invention, a spare node having a function of replacing a control node is provided, and the spare node selects a program and data of the control node to be replaced. The processing of the control node is executed alternately based on this.

The present invention according to claim 2 is based on claim 1.
In the invention described in the above, the spare node has transfer means for transferring the program and / or data of the control node stored in the storage means to a designated control node, and each control node has its own Storage means for storing the program and data, and updating and storing the program and / or data transferred from the transfer means and / or the corresponding information, and processing based on the program and data stored in the storage means The gist of the present invention is to have an execution means for executing.

According to the present invention, the spare node transfers the program and / or data of the control node to the designated control node, and each control node stores its own program and data. At the same time, it updates and stores the program and / or data transferred from the spare node and / or its corresponding information, and executes processing based on the stored program and data.

Further, the present invention according to claim 3 provides the invention according to claim 1.
Or the spare node sequentially accesses each control node, reads out a program and / or data from each of the accessed control nodes, transfers the read program and / or data to the spare node, and stores the program and / or data in the storage means. The gist of the present invention is to have a storage control unit for controlling the updating of the corresponding information already stored in the storage unit.

According to the third aspect of the present invention, the spare node sequentially accesses each control node, reads out and transfers the program and / or data from each control node, and stores the program and / or data in the storage means or stores the program and / or data in the storage means. Update the corresponding information that has been provided.

According to a fourth aspect of the present invention, in the first, second or third aspect of the present invention, the spare node sequentially accesses each control node and determines whether or not the accessed control node should be replaced. The gist of the present invention is to have an alternative judging means for judging by a predetermined logic.

According to the present invention, the spare node accesses each control node sequentially and determines whether or not the control node should be replaced by a predetermined logic.

The present invention according to claim 5 provides the present invention according to claim 4.
In the invention described, when the substitution determining unit determines that the control node should be replaced, the storage unit that stores the identification information of the control node, and after performing the replacement process of the control node, the replacement is performed. In the case of canceling, the gist of the present invention is to have a designation means for designating a control node stored in the storage means as a transfer destination of a program or data.

According to the fifth aspect of the present invention, when it is determined that the control node should be replaced, the identification information of the control node is stored. Specify the stored control node.

Further, in the present invention according to claim 6, in the invention according to claims 1, 2, 3, 4 or 5, when the spare node executes control node substitution, the spare node is addressed to the substituted control node. The present invention has a transmitting means for transmitting a signal for instructing switching of the address of the signal to the address of the signal addressed to the spare node to another device or the like via a signal network.

According to the sixth aspect of the present invention, the spare node sends a signal for instructing another device to switch the address of the signal addressed to the control node to be replaced with the address of the signal addressed to the spare node. Send out.

The present invention according to claim 7 is based on claims 1, 2, and 3.
In the invention described in 3, 4, 5, or 6, when the control node resumes the processing that has been replaced by the spare node, the address of the signal addressed to the spare node is switched to the address of the signal addressed to the control node. And transmitting means for transmitting a signal instructing the device to another device or the like via a signal network.

According to the present invention, when restarting the processing, the control node sends a signal instructing to switch the address of the signal addressed to the spare node to the address of the signal addressed to the control node. The data is transmitted to other devices via a network.

[0019]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of a communication network system according to one embodiment of the present invention. In the communication network system shown in FIG. 1, a plurality of control nodes 1a to 1n are connected to a signal network 3, to which a spare node 2 for replacing the control node when the control node fails or the like is connected. At the same time, another device (not shown) such as an exchange is connected via a signal line 4.

As shown in detail in FIG. 2, each of the control nodes 1a to 1n has a storage unit 11 for storing programs and data, and executes based on the programs and data stored in the storage unit 11. The unit 12 executes the processing. Each of the control nodes 1a to 1n further includes an address switching unit 13 and a signal function unit 14.

Signal function section 14 of each of control nodes 1a-1n
Indicates that the storage unit 1
1 and reads out the read-out program and data to the signal network 3 toward the spare node 2. Also, when the program and data are transferred from the spare node 2, the control node 1
The program and data received by the signal function unit 14 are supplied to the storage unit 11, and the programs and data stored in the storage unit 11 are updated.

As shown in detail in FIG. 3, the spare node 2 stores a program and data of each of the control nodes 1a to 1n, and stores a program and data corresponding to the alternative control node 1. From the part 21 and using this selected program and data,
A selection execution unit 22 for executing the processing of the control node 1, an access unit 23 for sequentially accessing the control nodes 1a to 1n,
An alternative determining unit 24 for determining whether to replace the control node 1 accessed via the access unit 23, an address storage unit 25 for storing the identification number or address of the alternative control node 1, and an address for switching the address of the signal It has a switching unit 26 and a signal function unit 27.

Next, the operation of the communication network system configured as described above will be described. The spare node 2 is connected to each control node 1
To read out the programs and data of a to 1n,
A signal for accessing each of the control nodes 1a to 1n is sequentially generated via the access unit 23, and this access signal is transmitted from the signal function unit 27 to each of the control nodes 1a to 1n via the signal network 3.
Send to Each of the control nodes 1a to 1n includes a spare node 2
When the signal function unit 14 receives the access signal control transmitted from the storage unit 11, the program and data are read from the storage unit 11, and the read program and data are returned from the signal function unit 14 to the backup node 2 via the signal network 3. .

The protection node 2 receives the program and data returned from the control node 1 by the signal function unit 27, transmits the program and data to the storage unit 21, and stores the program and data in the storage unit 21.
If the same program and data have already been stored in the storage unit 21, this is updated. As described above, the spare node 2 transmits the control nodes 1 in a predetermined order and a predetermined cycle.
a to 1n are sequentially accessed to read out the program and data of each control node and to store and update the program and data in the storage unit 21 so that the latest program of each control node 1a to 1n is stored in the storage unit 21. And the data is always stored, so that the processing of the control node 1 is substituted based on the latest program and data stored in the storage unit 21 even when the control node becomes abnormal as described later. Can be.

The spare node 2 is connected to each control node 1a.
In order to confirm the normality of the control nodes 1a to 1n, that is, to detect whether each of the control nodes 1a to 1n is in an abnormal state due to a failure or the like, or in a failure state, the access unit 23 accesses The signals are sequentially generated and transmitted to each control node via the signal function unit 27.
Each of the control nodes 1a to 1n transmits this signal to the signal function unit 14
, The execution unit 12 executes a predetermined process, and outputs a predetermined signal such as a signal for proving the normality of the control node or a signal indicating an abnormality from the signal function unit 14 to the signal network 3.
To the backup node 2 via

The protection node 2 receives the predetermined signal from the control node 1 at the signal function unit 27, and supplies the received predetermined signal to the substitution determination unit 24. Substitution judgment unit 24
Determines whether the control node 1 should be replaced by processing the predetermined signal by a predetermined logic.

As a result of this determination, when the replacement determining unit 24 of the backup node 2 determines that the control node 1 should be replaced, the identification number or address of the control node 1 is stored in the address storage unit 25. At the same time, the address switching unit 26 and the selection execution unit 22 are activated. The selection execution unit 22 reads out the program and data of the control node 1 stored in the address storage unit 25 from the storage unit 21, and performs an alternative process of the control node 1 based on the read out program and data of the control node 1. Execute On the other hand, the address switching unit 26 generates a signal for instructing to switch the address of the signal addressed to the control node 1 to the backup node 2, and sends the switching instruction signal from the signal function unit 27 to the other node via the signal network 3. To the device or the like. As a result, all the signals addressed to the control node 1 are transmitted to the backup node 2, whereby the backup node 2 can execute the substitute processing of the control node 1.

In this embodiment, the case where the switching instruction signal is automatically transmitted has been described. However, the selection execution unit 22 uses the program and data of the control node 1 stored in the storage unit 21 to execute the switching. It is also possible to execute the alternative processing of the control node 1 and send out the switching signal by an instruction manually.

As described above, after the spare node 2 substitutes for the processing of the control node 1, if the spare node 2 releases the substitution, that is, if the control node 1 recovers from a failure or the like, the spare node 2 The node 2 reads the program and data of the control node 1 stored in the storage unit 21 from the control node 1 of the identification number or the address stored in the address storage unit 25 and transmits the read program and data to the signal function. The signal is transmitted from the unit 27 to the control node 1 via the signal network 3.

The control node 1 receives the program and data transmitted from the backup node 2 by the signal function unit 14, and stores and updates the received program and data in the storage unit 11. As described above, when the spare node 2 substitutes for the process of the control node 1, the spare node 2 executes the substitute process based on the program and data of the control node 1 stored in the storage unit 21, In this process, the program does not change, and the data may be rewritten. Therefore, when the spare node 2 releases the substitution, the spare node 2 transfers the program and data to the control node 1 instead of transferring the program and data. You may transfer only.

In resuming the processing replaced by the backup node 2, the control node 1 switches the address of the signal addressed to the backup node 2 to the address of the signal addressed to the control node 1. The signal is generated by the address switching unit 13 and transmitted from the signal function unit 14 to the signal network 3.
To other devices via the backup node 2
All the signals switched to the destination are transmitted to the control node 1, whereby the processing of the control node 1 can be restarted.

[0033]

As described above, according to the present invention, a spare node having a function of replacing a control node is provided, and the spare node selects a program and data of the control node to be replaced. However, since the processing of the control node is executed alternately based on the program and data, even if the control node enters an abnormal state or a failure state due to a failure or the like, the spare node appropriately substitutes the processing of the control node. Therefore, it is not possible to make outgoing and incoming calls due to the system down, and the reliability of communication can be improved.

According to the second aspect of the present invention, the spare node transfers the program and / or data of the control node to the designated control node, and each control node transfers the program and / or data transferred from the spare node. Alternatively, the corresponding information is updated and stored in the data, and the processing is executed based on the stored program and data, so that the control node processes the spare node with the latest information changed in the substitution processing after the substitution processing. Can be restarted properly.

Further, according to the third aspect of the present invention, the spare node sequentially accesses each control node, reads and transfers the program and / or data from each control node, and stores the program and / or data in the storage means. Since the corresponding information stored is updated, the spare node always stores the latest program and data of each control node. Whenever the control node goes into an abnormal state, the spare node stores the latest program and data. Can be executed accurately.

According to the present invention, the spare node sequentially accesses each control node and determines whether or not the control node should be replaced by a predetermined logic.
An abnormal state or a failure state of the control node can be quickly detected, and a system down due to the abnormal state or the failure state of the control node can be avoided.

According to the present invention, when it is determined that the control node should be replaced, the identification information of the control node is stored, and when the replacement is canceled, the destination of the program or data is transferred. Since the stored control node is designated as, the process after the replacement is canceled can be properly restarted without being confused by the appropriate control node.

Further, according to the present invention, the spare node sends, to another device or the like, a signal instructing to switch the address of the signal addressed to the control node to be replaced to the address of the signal addressed to the spare node. Since the transmission is performed, the substitution process by the backup node can be performed accurately.

According to the present invention, when restarting the processing, the control node sends a signal for instructing to switch the address of the signal addressed to the spare node to the address of the signal addressed to the control node. Is transmitted to another device or the like through the control node, so that the control node can appropriately perform the restart processing after the substitution.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a communication network system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a control node used in the communication network system of FIG.

FIG. 3 is a block diagram showing a configuration of a backup node used in the communication network system of FIG. 1;

[Explanation of symbols]

 Reference Signs List 1 (1a to 1n) control node 2 spare node 3 signal network 4 signal line 11, 21 storage unit 12 execution unit 22 selection execution unit 23 access unit 24 substitution determination unit

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Naoki Tani 2-10-1 Toranomon, Minato-ku, Tokyo NTT Mobile Communication Network Co., Ltd. (56) References JP-A-58-114658 (JP) , A) JP-A-63-69360 (JP, A) JP-A-1-157638 (JP, A) JP-A-5-282172 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB Name) H04M 3/00 H04M 3/16-3/20 H04M 3/38-3/40 H04M 7/00-7/16 H04Q 3/54-3/56

Claims (7)

(57) [Claims] 1. A communication network system having a signal network to which one or a plurality of control nodes and other devices are connected, wherein the protection node is connected to the signal network and has a function of substituting the control node. The spare node selects storage means for storing programs and data of each control node, and selects a program and data of a control node to be replaced from the storage means, and performs the control based on the selected program and data. A communication network system, comprising: a backup node including an execution unit that executes a process of a node instead. 2. The backup node has a transfer unit that transfers a program and / or data of a control node stored in the storage unit to a designated control node, and each control node has its own Storage means for storing programs and data and updating and storing information corresponding to the programs and / or data transferred from the transfer means, and processing based on the programs and data stored in the storage means. The communication network system according to claim 1, further comprising an execution unit that executes the communication. 3. The spare node sequentially accesses each control node, reads out a program and / or data from each of the accessed control nodes, causes the spare node to transfer the program and / or data, and stores the program and data in the storage means. 3. The communication network system according to claim 1, further comprising storage control means for controlling the updating of the corresponding information already stored in said storage means. 4. The spare node includes an alternative determining means for sequentially accessing each control node and determining whether or not the accessed control node should be replaced by a predetermined logic. Item 4. The communication network system according to item 1, 2, or 3. 5. The substitution determining means, when determining that the control node should be replaced, storing means for storing identification information of the control node, and performing replacement processing of the control node. 5. The communication network system according to claim 4, further comprising a designation unit for designating a control node stored in said storage unit as a transfer destination of a program or data when canceling. 6. The backup node, when executing the replacement of the control node, sends, via a signal network, a signal instructing to switch the address of the signal addressed to the replacement control node to the address of the signal addressed to the backup node. 3. A device according to claim 1, further comprising transmitting means for transmitting to another device or the like.
The communication network system according to 3, 4 or 5. 7. The control node, when resuming processing that has been replaced by a spare node, sends a signal instructing to switch an address of a signal addressed to the spare node to an address of a signal addressed to the control node. 7. The communication network system according to claim 1, further comprising transmission means for transmitting the data to another device via a network.