KR100275445B1 - The duplex communication path method of signaling message exchange system - Google Patents

Abstract

PURPOSE: A method for duplexing communication path in signaling message exchange is provided to perform the communication, particularly, in signaling message system, by applying the idea of duplexing the communication path between individual modules instead of using the duplex structure between common high ways so that the communication path of the module having the broken unit for configuring a common communication highway can be replaced by a stand-by common communication path. CONSTITUTION: If a unit on one side that configures a communication path is broken down, the occurrence of the breakdown is notified to normal modules other than the first breakdown module having the broken unit, so that the normal modules communicate through the unit on the other side that belongs to the first breakdown module. The recovery of the broken unit is notified to the normal modules other than the first recovery module having the recovered unit so that the normal modules renew the communication path available for the first recovery module. When recovering the second broken module that is unable to communicate due to the breakdown of one side unit, the occurrence of breakdown is notified to the normal modules other than the second broken module, and then the status of the normal modules is notified to the second recovery module, in order to set a communication path available between the second recovery module and the normal modules.

Description

Duplex communication path method of signaling message exchange system in signaling relay switching system

The present invention provides a signal relay switching system which is a component of a public switched telephone network (PSTN), an integrated service digital network (ISDN), and a common line signaling network (NO.7) that is the basis of an intelligent network. (SMX-1: Signaling Message eXchange-1) The common structure of the highway that performs the inter-module message communication function is applied by applying the concept of redundancy of the communication path between modules. Communication path to prevent system error and improve the stable operation and reliability of the system by changing the communication path of the module to which the faulty unit belongs to perform communication through the standby common communication path according to the failure of the It relates to a redundancy method.

Fig. 1 is an exemplary configuration diagram of a general common line signaling system (NO.7) signal relay exchange system. Each thick solid line represents a module, and each block in the module represents a unit belonging to the module.

Signal relay switching system (SMX-1), which is a component of NO.7, which is the core foundation of PSDN, ISDN, and intelligent network service, performs signaling message relaying function. Message communication between modules (10 or 20).

The configuration of the common highways 10 and 20 includes a plurality of common interface interface function units (HIFUs) 11 and 21, which belong to each module to interface the modules with the communication paths. A message received by a plurality of common channel unit units (HCUs) 12 and 22 and HCUs 12 and 22 for point-to-point connection with HIFU 11 and 21 to form a message communication channel between modules. A common channel switching unit (HSU) 13 and 23 is provided for addressing to establish a channel between the relevant module and the HCUs 12 and 22 according to the address.

The common communication paths 10 and 20 constitute a communication path through each module, and each module constituting the communication path includes an operation and maintenance module (OMM) 30 configured as a redundancy and a redundancy. System and signal network management module 40, which is configured to perform the operation management, maintenance and signal network management function that is a unique function of the system, and a plurality of message transmission and reception for receiving or transmitting signal messages by forming a signal link with the power system It consists of the module 50.

The configuration of each module constituting the communication path is as follows.

The redundant operation and maintenance module (OMM) 30 has HIFUs 11, 21.

The redundant system and signal network management module 40 is a HIFU (11, 21), a global test and maintenance unit (GTMU) responsible for the operation management and maintenance of the entire system and its modules (41). ), And a signal network management execution unit 42.

The multiple message transmission / reception modules 50 are the NO.7 Level 3 management unit (L3U: NO.7 Level 3 handling) that performs HIFU (11, 21), operation management, maintenance, and routing of signal messages for the module. And a message transmission / reception unit 53 which is connected to a signal link to transmit and receive messages with the power system.

Since the failure of communication between each module by the common channel 10 or 20 affects the whole system, the common channel 10 or 20 is divided into two independent common channels 20 or 20 to maintain the reliability of the system. 10), the operation status can be switched to the standby common communication channel (20 or 10) by the operator's needs or due to the failure of the operation common communication channel (10 or 20). I can keep it.

The inter-module communication by the common communication channel 10 or 20 is performed by a configuration unit belonging to the operation common communication channel 10 or 20. Looking at the message flow of the communication path as follows.

The message in the communication path is transmitted through the HIFU 11 or 21 of the message originating module and received by the HCU 12 or 22 connected to the HIFU 11 or 21 one-to-one, and the address of the message at the HSU 13 or 23. According to setting the HCU 22 or 12 of the receiving module, the receiving HCU 12 or 22 moves the message to the setting HCU 22 or 12. At this time, the setting HCU 22 or 12 transmits the received message to the HIFU 21 or 11 of the destination module, thereby performing communication between modules.

2 is a flowchart of a conventional independent communication path redundancy method, and illustrates a switching procedure performed due to an operator command or a failure of a unit constituting the common communication path 10 or 20.

Referring to FIG. 2, each software block blocks each module and a function performed by a configuration unit constituting each module.

Looking at these functional blocks, the operation management block (a) in the operation and maintenance module (OMM) 30, the system management block (b) in the total inspection and maintenance unit (GTMU) 41, NO.7 The module management block (c) in the level 3 management unit (L3U) 51 and 52, and the unit management block (d) in the message transmission / reception unit 53 are divided.

If the configuration unit of the common communication channel (10 or 20) to be transferred to the operating state is in a normal state without a failure, a normal transfer procedure is performed. When attempting, it is not possible to configure the communication path to the failed module, so reset these modules to prevent error handling of messages.

The communication path duplication method performs the switching procedure according to the needs of the operator or due to the failure of the component unit. The transfer procedure is as follows.

First, according to the needs of the operator, the operator directly sends a command to switch the common communication channel 10 or 20 to the operation management block (a) (201), or the configuration unit has a failure, so that the module management block (c) becomes a system management block ( If the failure state of the HIFU 11 or 21 is notified to the operation management block a through b) (202, 203), the following switching procedure is performed.

Thereafter, after the system management block (b) checks the state of the HIFU (11 or 21), checks whether the maintenance protocol has been performed, and sets a response waiting timer, the unit management block (d) through the module management block (c) Command changeover of the common communication network 10 or 20 (204, 205). At this time, the HIFU (11 or 21) is set to the operation state in the module management table. For example, the entire failed HIFU 11 may be replaced by a redundant HIFU 21, or the entire failed HIFU 21 may be replaced by a redundant HIFU 11.

Subsequently, when the transfer completion message is received from the unit management block (d) via the module management block (c) (206, 207), the system management block (b) informs the operation management block (a) of the transfer completion (208), and the module. The non-response module of the transfer completion message received from the management block (c) is reset (209).

In the duplex structure of the conventional common communication channel 10 or 20, communication is performed independently between the constituent units of the corresponding common communication channel 10 or 20. That is, communication with the module associated with the failure cannot be performed due to a failure of one of the units constituting the common communication path 10 or 20, so that the switching unit is performed to the standby common communication network 20 or 10 where all of the configuration units are normal. . This structure is as shown in FIG.

FIG. 3 is an explanatory diagram illustrating an example of a conventional communication path duplication method, and illustrates a case where a communication path in a standby state is switched to an operation state due to a failure of a communication unit belonging to a module of a communication path in an operation state. That is, the fault HIFU 11 of the common communication channel 10 is transferred to the operational state by replacing the common communication channel 20 in the standby state with the HIFU 21.

As described above, the conventional switching method is configured in a normal state after disconnecting the communication path including the failure unit from the common communication channel (10 or 20) according to the failure of one or a part of the common communication channel (10 or 20) configuration unit. Switch to the standby common communication channel (20 or 10) with the unit so that the communication is disconnected so that a module that cannot provide service is not generated.

However, in the conventional method of switching, all of the configuration units perform a switching procedure according to the switching of the common communication channel 10 or 20, and in this process, a load may be generated on each module. There was a problem of resetting to the normal module. In addition, when the common communication channel 20 or 10 to be switched in a failure state when performing the switching procedure of the common communication channel 10 or 20 is not performed, the switching of the common communication channel 10 or 20 is not performed. The module of the configuration unit has a problem of failing to perform the redundancy function by resetting even if there is a normal HIFU (11 or 21) waiting for redundancy.

The present invention has been made to solve the above problems, a unit constituting a common communication path by applying the concept of redundancy of the communication path between each module in the signal relay switching system rather than the redundant structure between the common communication path (Highway) The purpose of the present invention is to provide a communication path redundancy method for performing communication through a common communication path of a module to which a corresponding failure unit belongs according to a failure of the module.

1 is an exemplary configuration diagram of an overall common line signaling system (NO.7) signal relay switching system (SMX-1).

2 is a flow chart for a conventional independent communication path redundancy method.

3 is an explanatory diagram showing an example of a conventional communication path duplication method;

4 is an explanatory diagram showing an example of a duplication method used in the present invention;

5A through 5C are flowcharts of one embodiment of a communication path duplication method according to the present invention;

6 is an explanatory diagram showing a communication path state between message originating and receiving modules used in the present invention.

7 is a state transition diagram for a communication path state change used in the present invention.

8 is an explanatory diagram showing a bypass communication path state between a calling module and a called module used in the present invention.

* Explanation of symbols for the main parts of the drawings

10,20: common communication channel 30: operation and maintenance module (OMM)

40: system and signal network management module 50: signal message transmission and reception module

The present invention for achieving the above object is, in the communication path redundancy method applied to the signal relay exchange system, when the failure of one unit constituting the communication path failure of the one unit unit other than the first failure module to which the failure unit belongs; A first step of communicating with said normal modules of said normal modules via said second unit belonging to said first faulty module; A second step of informing the normal items other than the first recovery module to which the recovery unit belongs when recovering the failure unit to update the available communication paths with the first recovery module; And notifying the recovery items to the normal modules other than the second failure module when the recovery of the second failure module that is in a state where communication is impossible due to the failure of both units, and notifying the state of the normal modules to the second recovery module. And a third step of establishing an available communication path between the module and the normal modules.

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

4 is an explanatory diagram illustrating an example of the duplication method used in the present invention, and illustrates a case in which only a communication path of a corresponding unit is changed due to a failure of a communication unit belonging to a module of a communication path in an operating state. That is, the communication between modules is performed by replacing only the communication path with the HIFU 11 of the common communication path 20 in the failure state HIFU 11 of the common communication path 10.

Looking at the transfer procedure for performing this structure in detail as follows.

5A to 5C are flowcharts illustrating an embodiment of a communication path duplication method according to the present invention. In this case, each of the software blocks a to c blocks a function performed by a unit constituting each module.

5A is a flowchart illustrating a process in the case where a failure of a unit belonging to a communication path occurs.

First, the module management block (c) of the GTMU 41 or the L3U (51, 52) detects the failure of the HIFU 11 or 21 and reports the failure to the system management block (b) of the operation GTMU 41. The lower surface 501, the system management block b informs the operation management block a of the failure state of the HIFU 11 or 21 (502).

Thereafter, the system management block (b) informs the module management block (c) of the normal module of the failure state of the failure HIFU 11 or 21 (503). At this time, the module management block (c) of the normal module determines the HIFU (21 or 11) available between the faulty module to which the faulty HIFU (11 or 21) belongs and the normal module (see FIGS. 6 and 7 described later), The normal module communicates with the failing module through the determined HIFU 21 or 11.

Fig. 5B is a flow chart of the process in the case where the faulty communication unit is restored, in which the faulty unit of the common communication channel 10 or 20 that was faulty is restored (that is, the faulty HIFU 11 or 21 is recovered by downloading). Indicate the processing procedure.

When a unit download completion message is received from the operation management block (a) to the fault HIFU (11 or 21) indicating that the downloading is completed in the system management block (b) of the GTMU 41 (511), the system management block ( b) informs the module management block (c) of the normal module that the faulty HIFU 11 or 21 has been recovered (512). At this time, in the module management block (c) of the normal module, the HIFU 11 or 21 available between the recovery module to which the recovery HIFU 11 or 21 belongs and the normal module is determined (see FIGS. 6 and 7 described later). Update the.

5C is a flow chart of the processing in the case where the entire module recovers from the failure.

When a downloading completion message is received from the operation management block (a) to the system management block (b) of the GTMU 41 informing the failure module that the downloading is completed (521), the system management block (b) is a module of the normal module. The management message (c) broadcasts an available message for the recovery module (522). At this time, the normal module updates the recovery module state according to the module recovery procedure, and determines the available HIFU 21 or 11 with the HIFU 11 or 21 belonging to the recovery module (downloading module) (Fig. 6 and See FIG. 7).

And, the system management block (b) is a state for the HIFU (11 or 21) of the normal module other than the recovery module because the recovery module restored by downloading does not hold the HIFU (11 or 21) state data for the normal module. 523 is reported to the module management block (c) of the recovery module. At this time, the recovery module determines the available HIFU 21 or 11 based on the received HIFU 11 or 21 state data (see FIGS. 6 and 7 described below).

Looking at the HIFU (21 or 11) determination procedure available between modules for the available communication path as described above is as follows.

First, in order to determine the HIFU 21 or 11 available between one module and another module, a state table (see FIG. 6) is configured whenever the state of the HIFU 11 or 21 is changed for each module. Each state value according to the state of HIFU (11 or 21) between the corresponding module (i.e., the originating module) and the destination module and the state table (FIG. 6) of available HIFUs 21 or 11 are shown in the module management block 41, 42, 51, 52, 53).

The available HIFUs 21 or 11 are then determined according to each condition. That is, the determination of the available HIFU (21 or 11) in each module is, when the state change of the HIFU (11 or 21) occurs, the state value of the state table is determined by the state transition diagram (FIG. 7) for the communication path state change. The available HIFUs 21 or 11 are determined.

Referring to Figure 6, "0" is a normal state, "1" is a failure state, "a" is HIFU (11), "b" is HIFU (21), "a *" is a bypass module use communication through a , And "b *" indicate bypass module use communication through b, respectively.

Referring to FIG. 7, "a /" indicates a fault condition of the HIFU 11 of the corresponding module, "b /" indicates a fault condition of the HIFU 21 of the corresponding module, and "/ a" indicates the HIFU of another module. 11) indicates failure state reception, and " / b " indicates failure state reception of HIFU 21 of another module, respectively. Here, the reverse transition of each state represents recovery of a fault state.

Looking at the HIFU (21 or 11) determination procedure available in the state (S0) that both the state of the HIFU (11 or 21) of the calling module and the called module is normal as follows.

If a fault condition of one HIFU 11 (a) of another module is received (/ a), the state transition diagram (see FIG. 7) transitions from the S0 state to the S2 state, and the state table (see FIG. 6). HIFU 21 (b) in the S2 state is available.

When a recovery state of a faulty HIFU 11 (a) is received, the state transition diagram returns to the S0 state, which is the reverse of the fault, and the state table uses both HIFUs (11, 21) (a, b) of the S0 state. It is possible, and the actual communication is performed in both HIFU (11, 21) (a, b) belonging to the operational common communication channel (10, 20).

On the other hand, if a fault condition of one HIFU 11 (a) of its own module is received (a /), it transitions from the S0 state to the S6 state in the state transition diagram, and the HIFU (b) of the S6 state is available in the state table. Do.

When a recovery state of the faulty HIFU 11 (a) is received, the state transition diagram returns to the S0 state, which is the reverse of the previous fault, and in the state table, both HIFUs (11, 21) (a, b) of the S0 state are It is available and the actual communication is carried out in both HIFUs 11, 21 (a, b) belonging to the operational common channel 10, 20.

In the determination of the available HIFU 21 or 11, if the S5 and S7 states (i.e. when direct communication between the calling module and the called module are not possible) (see Fig. 8) in the state table, the bypass module is not reachable directly. Communicate between calling module and called module through At this time, the detour module is determined by checking the state of the previous module of the called module and selecting these modules as the bypass module if both HIFUs (11, 21) are normal, and determining the method of checking the next module of the called module if it is not normal.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited to the drawings shown.

As described above, the present invention does not involve switching of a common communication interface function unit (HIFU) related to all modules due to a failure of one unit constituting a common communication path, but only a communication path of a module including the corresponding unit. It is possible to improve the reliability of the service by changing the system to ensure stable operation and to stop the service by resetting the module corresponding to the faulty unit.

Claims (6)

In the communication path redundancy method applied to the signal relay switching system, In the event of failure of one unit constituting the communication path, the failure occurrence of the one unit is informed to the normal modules other than the first failure module to which the failure unit belongs, and the normal modules communicate through the other unit belonging to the first failure module. Stage 1; A second step of informing the normal items other than the first recovery module to which the recovery unit belongs when recovering the failure unit to update the available communication paths with the first recovery module; And Upon recovery of the second failure module that is in a state where communication is impossible due to a failure of both units, the recovery items are notified to the normal modules other than the second failure module and the states of the normal modules are notified to the second recovery module. A third step of establishing an available communication path between the controller and the normal modules Communication path redundancy method in a signal relay switching system comprising a. The method of claim 1, The first step is, A fourth step in which the module management block of the whole inspection and maintenance unit (GTMU) or the message transmitting / receiving unit detects the occurrence of the failure of the failure unit and reports the occurrence of the failure to the system management block of the whole inspection and maintenance unit; A fifth step of the system management block notifying a failure state of the failure unit to an operation management block and a module management block of the normal modules; A sixth step of the module management block of the normal modules determining an available communication path between the first failed module to which the failed unit belongs and the normal modules; And A seventh step of communicating via the other unit of the first failing module in which the normal modules are determined; Communication path redundancy method in a signal relay switching system comprising a. The method according to claim 1 or 2, The second step, An eighth step of downloading the operation management block from the operator and transmitting a unit download completion message to the system management block informing the failure unit that the downloading is completed; A ninth step of the system management block notifying the module management block of the normal modules that the failing unit has been restored; And A tenth step of the module management block updating the communication path by determining a communication path available between the first recovery module to which the recovery unit belongs and the normal modules; Communication path redundancy method in a signal relay switching system comprising a. The method of claim 3, wherein The third step, An eleventh that transmits a downloading completion message to the system management block indicating that downloading is completed to the second failure module in which the operation management block cannot communicate due to a failure of the two units composed of the one unit and the other unit. step; The system management block informs the module management block of the normal modules of the available state for the second recovery module that is in a recovery state for the second failing module, and the second recovery module according to a module recovery procedure in the normal modules. Updating a state of a signal and determining an available communication path with the second recovery module; And The system management block informs the module management block of the second recovery module of the state of both units of the normal modules to determine an available communication path due to the state data of the both units received at the second recovery module. The thirteenth step Communication path redundancy method in a signal relay switching system comprising a. The method of claim 4, wherein The process of determining the communication path, A fourteenth step of constructing a state table each time a state of both units is changed for each module; And A fifteenth step of determining a state value and an available communication path of the state table according to a state transition diagram for a communication path state change; Communication path redundancy method in a signal relay switching system comprising a. The method of claim 5, Each unit, A communication path redundancy method in a signal relay switching system, characterized in that it is a common interface function unit (HIFU).