KR19990030778A - Routing Method for Multi-Module Control - Google Patents

Abstract

The present invention relates to a routing method for multi-module control, which is a routing method suitable for an interworking structure having multi-module control, and is a database for route data management. Interworking of B-ISDN and PSTN in a system having a structure in which the DB number, the relay number management table for each root / subsystem / interlock system, and the IWS having 1024 relay lines are connected to the ALS in a multi-module form It is characterized in that it includes a routing processing function of the call processing process for, the routing method in the multi-module control form proposed in the present invention is a structure to increase the reusability of the software to minimize the existing program modification, and B -ISDN system accepts existing PSTN subscribers and provides interworking services with B-ISDN subscribers. Even all the subscribers to change the system, such as the replacement of a B-ISDN systems are occurring on the PSTN system has the effect of which can be provided with the desired service.

Description

Routing Method for Multi-Module Control

The present invention relates to a routing method for multi-module control.

The route data used in the public switched telephone network (hereinafter referred to as PSTN) is distributed and distributed in 1024 routes in several subsystems, and 1024 relay lines are managed in one subsystem per route. In the interlocking structure, 1024 routes are distributed and distributed in various interlocking systems of several subsystems, and one subsystem has several interlocking system structures in which 1024 relay lines are mounted and managed in a module form.

Therefore, the routing-related data structure needs to be changed, and a new method for handling the routing function is needed.

According to the above needs, the present invention has an object to provide a routing method for multi-module control.

1 is an overall structural diagram of a routing method for multi-module control of the present invention;

2 is a block diagram and message flow structure diagram for a routing method for multi-module control of the present invention;

3 is a database structure diagram for a routing method for multi-module control of the present invention;

4 is an overall flowchart of a routing method for multi-module control to which the present invention is applied.

<Description of Symbols for Main Parts of Drawings>

100: local access switching subsystem (ALS)

110: local access local switching subsystem / relay line (ALS / T)

120: narrowband trunk line control function (TKCNF)

200: interworking subsystem (IWS)

210: narrowband trunk line interface function (TINF)

300: central access switching subsystem (ACS)

310: operation maintenance processor (OMP)

311 narrowband route control function (RCONF)

312 narrowband number translation function (NTRNF)

400: RT_ALS_INF database 410,510,610: root number

420: ALS mounted state 430: Number of idle relay lines

500: RT_ALSDIWS_INF database 520,620: ALS number

530: Mount IWS Status

600: RT_ALSIWSTRK_INF database

630: IWS No. 640: Number of relay lines

In order to achieve the above object, the present invention provides a database for performing a routing function for multi-module control, and interworking the RT_ALS_INF database and the route consisting of information of a local switching subsystem (ALS) implementation state and the number of idle trunks. The routing function is performed by configuring the RT_ALSIWS_INF database configured with the mounting status information of the subsystem IWS and the RT_ALSIWSTRK_INF database representing the number of relay lines of the IWS.

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

1 is a schematic structural diagram of a routing method for multi-module control of the present invention, in which an Local Access Switching Subsystem (ALS) 100 is an interface for a controller, a subscriber and a relay line, and a local. It consists of a switch.

In the ALS 100, a call and connection control processor (hereinafter referred to as CCCP), a subscriber's connection processing and a higher subscriber call processing function of traffic control, a network-to-network interface (hereinafter NNI) It performs upper relay call processing function of network connection processing and traffic control using protocol.

In addition, higher-level software related to the public switched telephone network (hereinafter referred to as PSTN), which handles interworking with the broadband integrated service digital network (hereinafter referred to as B-ISDN), will also be implemented.

Non-blocking magnetic routing switches in the ALS perform local switching and aggregation functions.

Interface module for subscriber supports SDH frame structure and DSIE / DS3 UNI, and trunk line module supports NNI of SDH frame structure.

The central access switching subsystem (ACS) 300 is equipped with a switch module and an operation and maintenance processor (OMP) 310.

The OMP 310 performs call number translation, trunk line / root control, and trunk line / root data management.

It also performs system level maintenance, testing, billing, statistics, and various input / output control functions with the operator.

An interworking subsystem (hereinafter referred to as IWS) 200 is a subsystem for matching the PSTN subscriber and the relay line to the B-ISDN and matches the ALS 100 in the form of one interface module.

The IWS 200 provides a time switching and local service function, performs cell assembly / decomposition of voice information, and may be connected to a plurality of ALSs 100.

FIG. 2 is a block diagram and message flow structure diagram for a routing method for multi-module control according to the present invention. The routing function is referred to as a narrowband route control function (hereinafter referred to as RCONF) implemented in the OMP 310. Play a main role in block 311.

Since the routing function is a function for relay call service among call services, the RCONF block 311 is used for number translation of the narrow-band number translation function (hereinafter referred to as NTRNF) 312 in the OMP 310. Outgoing call is decided by the routing request is received.

Relay line occupancy request with a narrow-band trunk control function (Trunk Control Narrow Function, hereinafter referred to as TKCNF) block to perform relay line occupancy function using the route determined after the routing function and the IWS 200 of the ALS 100 Do

The TKCNF 120 attempts to occupy the relay line with the narrow-band trunk interface function (hereinafter referred to as TINF) 210 of the IWS 200.

3 is a database structure diagram for a routing method for multi-module control according to the present invention. Root number 101 is a key to access the corresponding tuple, and consists of information such as the ALS implementation status 102, the number of idle trunks (103).

The ALS implementation status field is represented by the maximum number of ALS bit strings.

The RT_ASSIWS_INF database 200 is a database (DB) indicating a mounting state of connected IWS per ALS on which each root is mounted, and the root number 201 and the ALS number 202 are keyed to determine the mounting state 203 of the IWS. do.

The IWS implementation status field is expressed by the maximum number of IWS bit strings.

RT_ALSIWSTRK_INF database 300 is a DB representing the number of relay lines of connected IWS per mounted ALS of each route, and the root number 301, ALS number 302, and IWS number 303 are keyed to determine the number of relay lines 304. do.

4 is an overall flowchart of a routing method for multi-module control to which the present invention is applied.

Routing is a function that determines the access switching processor (ALS) and interworking system (IWS) belonging to the corresponding route to occupy the trunk line of the relay call.If the routing request is received for the outgoing call and the relay call (S1), the routing sequence Determine and determine the number of idle relay lines for the route (S2) and examine the number of relay lines in the idle state (S3). If there is no relay line in the idle state, obtain the bypass route (S4) and examine the number of idle relay lines again.

As a result of the investigation (S3), if there is a dormant relay line, one of the distributed and accommodated ALS is selected according to the hunting type in order to make the relay line occupancy request for the distributed and accommodated relay line for each ALS / IWS of the root (S5), Select one of the IWSs according to the hunting type (S6) to obtain the number of relays accommodated in the selected IWS (S7) and examine the number of relays (S8) .If there are no relays, select a new IWS according to the hunting type (S9) Investigate the number of received relay lines (S8).

If there is a relay line as a result of the investigation (S8), it is requested to attempt to occupy the relay line and ends (S10).

As described above, in the present invention, when the PSTN interworks with B-ISDN, 1024 routes are distributed and implemented in multiple interworking systems of several subsystems in an interworking structure in which interworking processing is performed in one subsystem in the system, which is not a manganese interworking type. One sub-system has multiple interlocking systems in which 1024 relay lines are mounted and managed in one module form, that is, a routing method suitable for an interlocking structure having multi-module control. Modified existing program with new routing processing function for interworking B-ISDN and PSTN by configuring system implementation status database, interworking system implementation status DB per root of each route, and relay line management table for each route / subsystem / interlock system. It is a structure to increase the reusability of the software in a way that minimizes.

In addition, the B-ISDN system accommodates existing PSTN subscribers and provides interworking services between the B-ISDN subscribers and the PSTN subscribers, so that even if a change such as a system replacement from the PSTN system to the B-ISDN system occurs, all subscribers want to Has the effect of receiving service.

Claims (2)

In the routing method for multi-module control, The database for performing the routing function for multi-module control is the RT_ALS_INF database consisting of the local access switching subsystem (ALS) mounted state and the number of idle trunks, and the interworking subsystem (IWS) for the root. A first process comprising a configured RT_ALSIWS_INF database and an RT_ALSIWSTRK) _INF database representing the number of relay lines of the IWS; And a second process of performing the routing function. The method of claim 1, wherein the second process Determining a routing sequence, obtaining a number of idle relay lines for a route, and examining the number of idle relay lines when a routing request is received; A second step of determining the number of relay lines in the dormant state and obtaining a detour route and examining the number of dormant relay lines again if there is no dormant relay line; After the determination, if there is a dormant relay line, one of the distributed ALSs is selected according to the hunting type for the relay line occupancy request for the distributed accommodating relay line for each local access switching subsystem / interworking subsystem (ALS / IWS) of the route. With three steps; Selecting one of the distributedly accommodated ALSs according to the hunting type and then selecting one of the distributedly accommodated ILSs according to the hunting type according to the hunting type; Selecting one of the IWSs according to a hunting type, and obtaining a number of relay lines accommodated in the selected IWS and examining the number of relay lines; A sixth step of selecting a new IWS according to a hunting type and examining the number of relay lines accommodated in the IWS if there is no relay line after the number of relay lines; And a seventh step of requesting and terminating the relay line occupancy if there is a relay line after checking the number of relay lines accommodated in the corresponding IWS.