KR100459855B1 - Method for Distributed Accommodation of Software Directory Number in an Exchange System - Google Patents

Abstract

The present invention relates to a virtual number function in a distributed processor architecture. In particular, a method for accommodating virtual number distribution that is suitable for a field requiring subscriber distribution so that one or more telephones can operate normally in any case is emphasized in the vitality of communication. It is about.

The virtual number distribution accepting method of the present invention comprises the steps of: transmitting control node information for each virtual number distributed to different nodes to each node; Inquiring whether a virtual number is available to a control node of a corresponding virtual number using the control node information for each virtual number from a node that receives a virtual number occupation request; Responding to the query and updating the virtual number management table using the internal virtual number management table information at the control node; And transmitting the updated virtual number management table to each node to synchronize.

According to the present invention, by receiving the same virtual number distributed to a plurality of telephones belonging to multiple nodes, even if a failure occurs in a specific node, it is possible to ensure the reliability of communication by making a call out through a telephone housed in another normal node It works.

Description

Method for Distributed Accommodation of Software Directory Number in an Exchange System

The present invention relates to a virtual number function in a distributed processor architecture. In particular, a method for accommodating virtual number distribution that is suitable for a field requiring subscriber distribution so that one or more telephones can operate normally in any case is emphasized in the vitality of communication. It is about.

The Software Directory Number feature, commonly referred to as a private branch exchange (PBX) vendor for multi-line features or multi-assigned software numbering features, accommodates a single number on multiple multifunction phones, allowing multiple It is a function that operates as if a large telephone is attached.

For example, in the case of a call reception, an incoming ring rings simultaneously to multiple multi-function telephones using the same virtual number, and when a call is answered from any multi-function telephone, another subscriber's ring is disconnected and a call is made.

In the case of call origination, a plurality of virtual numbers having different functions and series are accommodated in the same multifunction telephone, and the subscriber selects the corresponding virtual number and sends a call according to the corresponding function and series.

In the conventional virtual number function system, as shown in FIG. 1, a plurality of Local Switching Modules (LSMs) 11 to 13, which are nodes that perform subscriber 1 to 9 call processing, and between each LSM 11 to 13, are used. It consists of a Central Switching Module (CSM) 20 that manages voice and data transmission and a Central Processing Module (CPM) 30 connected to the operator terminal 40.

The same virtual number distinguished from the virtual number accommodated in the other LSMs 11-13 is accommodated in the multifunction telephones of the subscribers 1-9 in each LSM 11-13. For example, the virtual number A is accommodated in the LSM 1 11 and the virtual number B is accommodated in the LSM 2 12 which is a node different from the LSM 1 11.

Referring to Figure 2 attached to the virtual number function in the virtual number function system of the switch as described above is as follows.

Receiving the virtual number occupation request from any of the subscribers 1-9, the LSMs 11-13 search the internal virtual number management table to check whether the corresponding virtual number is available (S21, S22).

As a result of the confirmation (S22), if the virtual number is in use by another subscriber, the occupancy disallowed notification is made (S23), if not in use, the occupancy permission notification is made so that the corresponding subscriber occupies the virtual number (S24). .

As described above, since the virtual number function is implemented only within the same node (LSM) in the related art, when a node fails and operates abnormally, the virtual number function of the virtual number stored in the node cannot be performed. There was a problem.

This means that even in the case of abnormal operation of one node, it is impossible to satisfy customers at sites where communication vitality is emphasized, such as the necessity of distributing and distributing telephones to multiple nodes to enable wired communication at normal nodes.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and its object is to distribute and receive the same virtual number among a plurality of phones belonging to multiple nodes, so that even when a specific node fails, the call is made through a telephone housed at another normal node. This is possible to ensure the reliability of the communication.

1 is a diagram illustrating a virtual number receiving structure of a conventional switching system.

FIG. 2 is a flowchart of a virtual number function control in FIG. 1; FIG.

3 is a diagram illustrating a virtual number distribution accepting structure of an exchange system according to the present invention;

4 is a data structure diagram of a DBMS according to the present invention.

5 is a control flowchart for accepting virtual number distribution in FIG. 3; FIG.

6 is a control flowchart for broadcasting DBMS information in FIG. 3;

7 is a control flowchart for virtual number distribution acceptance according to an embodiment of the present invention.

8 is a control flow diagram for accepting virtual number distribution upon control node change and restart according to an embodiment of the present invention;

Explanation of symbols on the main parts of the drawings

1 ~ 9: Subscribers 11 ~ 13: LSM

20: CSM 30: CPM

40: operator terminal

The virtual number distribution acceptance method of the present invention for achieving the above object comprises the steps of: transmitting the control node information for each virtual number distributed to different nodes to each node; Inquiring whether a virtual number is available to a control node of a corresponding virtual number using the control node information for each virtual number from a node that receives a virtual number occupation request; Responding to the query and updating the virtual number management table using the internal virtual number management table information at the control node; And transmitting the updated virtual number management table to each node to synchronize.

Preferably, the updating of the virtual number management table comprises: retrieving a corresponding virtual number management table from a control node inquired about whether the virtual number is available; Notifying that the virtual number is unavailable when the search result is in use; And notifying that the virtual number is not in use and updating the virtual number management table.

Furthermore, as another embodiment of the present invention, when a failure of the control node occurs, the next node defined in the system receives an inquiry about whether the virtual number is available, and uses the corresponding virtual number using the synchronized virtual number management table. Characterized in that it further comprises the process of responding to the question of availability.

Furthermore, requesting virtual number management table information to each node when the failure control node is restarted; And transmitting the virtual number management table information on the virtual number controlled by the control node restarted at each node to the control node.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a diagram illustrating a distribution structure of a virtual directory (Software Directory Number) of the exchange system according to an embodiment of the present invention.

Referring to FIG. 3, a switching system includes a plurality of local switching modules (LSMs) 11 through 13, which are nodes that accept a maximum of 1024 subscribers 1 through 9 and perform call processing of the corresponding subscribers 1 through 9, respectively. It consists of a Central Switching Module (CSM) 20 that is responsible for voice and data transmission between each node and the Central Processing Module (CPM) 30 connected to the operator terminal 40.

According to the present invention, subscribers 1 to 9 using the same virtual number can be accommodated in different LSMs 11 to 13. For example, subscribers 1 to 3 using the same virtual number A may be distributed and accommodated in the LSM 1 11, the LSM 2 12, and the LSM 3 13, respectively.

When the information is added, changed or deleted in the DBMS where the information about the virtual number is stored by the operator terminal 40, the CPM 30 accepts the same virtual number in each of the LSMs 11 to 13, respectively. The corresponding information is transmitted to each LSM 11 to 13 through the CSM 20 to synchronize the DBMS information between the LSMs 11 to 13 so that the 11 to 13 have the same information.

4 is a diagram illustrating a data structure of the DBMS as an embodiment of the present invention.

Referring to FIG. 4, in the DBMS, subscriber 1 to 9 information and control node information are stored for each virtual number. For example, in case of virtual number A, subscribers using the subscriber number are subscriber 1 (1), subscriber 2 (2) and subscriber. As 3 (3), the control node controlling the virtual number A may be stored as LSM 1 (11). Here, the control node is a software block defined to control call processing through the distributed virtual numbers because the virtual numbers are distributed to and received by other nodes according to the present invention, and the upper level of the call processing function blocks in the corresponding LSMs 11 to 13. It may be implemented as a control block.

On the other hand, the LSM (11 ~ 13) receives the information about the control node for each virtual number transmitted from the CPM (30) through the CSM 20 to store and manage in the internal database management system (DBMS), control of the corresponding virtual number When a node receives an inquiry about whether a virtual number is available from a specific LSM 11 to 13 that receives an occupancy request for a virtual number, the node searches for a virtual number management table managed internally and responds correspondingly.

The virtual number management table may store a value indicating whether the corresponding virtual number is in use and information on the subscriber in use.

Therefore, the control node searches the internal virtual number management table and notifies the user if the corresponding virtual number is in use, and notifies the user if it is not in use.

When the virtual number available notification is made, the virtual number management table is updated by storing subscriber information (subscriber line information, etc.) requesting possession of the virtual number in the internal virtual number management table, thereby updating the updated virtual number management table. The information is broadcast to each LSM 11 to 13. The reason for broadcasting the updated information is to allow other LSMs 11 to 13 to function as control nodes when the control node of the corresponding virtual number is abnormally operated due to a failure or the like.

5 is a control flowchart for virtual number distribution acceptance according to an embodiment of the present invention.

Referring to FIG. 5, the CPM 30 broadcasts control node information for each virtual number of the DBMS to each LSM 11 to 13 to synchronize DBMS information of each LSM 11 to 13 (S501).

Then, each of the LSMs 11 to 13 stores and manages the received control node information for each virtual number in an internal DBMS.

Then, if there is a request for occupancy for a particular virtual number from any of subscribers 1-9, the LSM 11-13 receiving the occupancy request retrieves DBMS information to determine whether it is a control node of the corresponding virtual number. Check (S502, S503).

As a result of the checking (S503), if it is not the control node, it is inquired whether the virtual number is available to the control node of the corresponding virtual number (S504), and the received control node searches the internal virtual number management table to find the corresponding virtual number. Check whether the number is currently being used (S505, S506, S507).

If the virtual number is in use, the LSM 11 to 13 inquiring whether or not to use it is notified of the unavailability (S508), if not in use is notified of the available (S509).

If the subscriber occupies the virtual number according to the available notification, the control node updates the virtual number management table by storing the subscriber information in an internal virtual number management table (S510), and then updates the updated virtual number management table information. Is transmitted to each node (S511).

6 is a flowchart illustrating control node information broadcasting for each virtual number of the CPM 30.

Referring to FIG. 6, when the control node information for each virtual number of the DBMS is added, changed or deleted by the operator terminal 40, the CPM 30 controls the control node for each virtual number for synchronization between LSMs 11 to 13. The information is transmitted to the CSM 20 (S601).

Then, the CSM 20 broadcasts the received broadcast information to each of the LSMs 11 to 13 (S602, S603, S604), and each of the LSMs 11 to 13 stores the received information in an internal DBMS, thereby providing a virtual number. Synchronize star control node information.

FIG. 7 is a control flowchart of each LSM 11 to 13 for accepting virtual number distribution according to an embodiment of the present invention, in which LSM 1 (11), LSM 2 (12), and LSM 3 (13) are shown in FIG. It is assumed that any subscriber 4 (4) and subscriber 6 (6) make a request to seize the virtual number B to the LSM 1 (11) and LSM 3 (13) at the same time while synchronizing with the same DBMS information.

Referring to FIG. 7, the LSM 1 11 and the LSM 3 13 receiving the occupancy request for the virtual number B of the subscriber 4 (4) and the subscriber 6 (6), respectively, control the virtual number B through the internal DBMS. The node is checked (S701, S702).

In response to the check result, the LSM 2 (12), which is the control node, is inquired about whether the virtual number B is available (S703, S704).

The LSM 2 12, which is a control node inquiring about the availability of the virtual number B, searches the internal virtual number management table to check whether the virtual number B is in use (S705).

As a result of the check (S705), when the virtual number B is not in use, the LSM 1 (11) is notified that the virtual number B is available (S706). In this case, the notification may be made to the LSM 3 (13) rather than the LSM 1 (11).

Thereafter, when the LSM 1 (11) receiving the availability notification of the virtual number B performs the call processing of the corresponding subscriber 4 (4) via the virtual number B, the LSM 2 (12) virtualizes the internal virtual number management table. By registering and storing subscriber 4 (4) as a user of number B, the virtual number management table is updated (S707).

In addition, the updated virtual number management table information is broadcasted to other nodes LSM 1 (11) and LSM 3 (13) in preparation for a control node change due to node failure (S708, S709), and the use of the virtual number B is performed. The LSM 3 (13) inquiring about the availability is notified of the unavailable virtual number B (S710).

FIG. 8 is a control flowchart for changing a control node and restarting a control node due to a failure of a specific virtual number control node, in which LSM 1 (11), LSM 2 (12), and LSM 3 (13) are connected to DBMS information as shown in FIG. In the synchronized state, it is assumed that the LSM 2 12, which is the control node of the virtual number B, operates abnormally due to a failure.

As described above, when an abnormal operation of the control node is detected, the control node is changed to the next node, and if the next node is abnormal, the control node repeatedly searches for the maximum node defined by the system. At this time, the virtual number management table is in a state where all nodes are synchronized in the same state, even if the control node for a particular virtual number is changed, normal call processing is possible.

Referring to FIG. 8, when a failure occurs in the LSM 2 (12), which is the control node of the virtual number B (S801), the LSM 1 (11) that receives the occupancy request of the virtual number B from the subscriber 4 (4) receives LSM 2 ( 12) and detects the availability of the virtual number B to the next node LSM 3 (13) defined in the system (S802, S803).

At this time, the LSM 3 13 functions as a control node of the virtual number B according to the failure of the LSM 2 12 and searches for an internal virtual number management table updated through broadcast (S804).

If the virtual number B is not in use according to the search result of the virtual number management table, after notifying the LSM 1 (11) that the virtual number B can be used (S805), the virtual number B is displayed in the internal virtual number management table. By registering and storing the user as subscriber 4 (4), the virtual number management table is updated (S806).

Then, the updated virtual number management table information is transmitted to the other node LSM 1 (11) to synchronize the information on the virtual number (S807).

After that, when the LSM 2 12, which is abnormal, is restarted by operating normally (S808), the LSM 2 12 performs a function as a control node for the virtual number B again. To this end, the virtual number management table information is requested to the other nodes LSM 1 (11) and LSM 3 (13) to update the internal virtual number management table initialized due to the restart (S809, S810).

LSM 1 (11) and LSM 3 (13) receiving this send internal virtual number management table information to LSM 2 (12), where LSM 2 ( It is preferable that 12) selects the virtual number management table information for the virtual number B which controls the call processing as the control node and transmits it to the LSM 2 (12).

Thereafter, the LSM 1 (11) receiving the occupancy request for the virtual number B inquires whether the virtual number B is available to the LSM 2 (12) that has restored its function as the control node for the virtual number B. (S813, S814).

In addition, the embodiment according to the present invention is not limited to the above description, and various alternatives, modifications, and changes can be made within the scope apparent to those skilled in the art.

As described above, the present invention distributes and accepts the same virtual number to a plurality of telephones belonging to multiple nodes, so that even if a specific node fails, call reception is possible through a telephone housed at another normal node to ensure reliability of communication. It can be effective.

Claims (4)

Transmitting control node information for each virtual number distributed to different nodes to each node; Inquiring whether a virtual number is available to a control node of a corresponding virtual number using the control node information for each virtual number from a node that receives a virtual number occupation request; Responding to the query and updating the virtual number management table using the internal virtual number management table information at the control node; And transmitting the updated virtual number management table to each node so as to synchronize the updated virtual number management table. The method of claim 1, The updating of the virtual number management table may include: retrieving a corresponding virtual number management table from a control node inquired about whether the virtual number is available; Notifying that the virtual number is unavailable when the search result is in use; And if the virtual number is not in use, providing a notification of availability and updating a virtual number management table. The method of claim 1, In the event of a failure of the control node, the next node defined in the system receives a query for the availability of the virtual number, and responds to the corresponding virtual number availability query using the synchronized virtual number management table. Virtual number distribution acceptance method in the exchange system, characterized in that further comprises. The method of claim 3, wherein Requesting virtual number management table information from each node when restarting the failure control node; And transmitting the virtual number management table information on the virtual number controlled by the control node restarted at each node to the control node.