KR100275509B1 - Switching coltrol method for the announcement in an atm switching system - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a switch control method for continuously providing announcement in an asynchronous delivery mode switching system.

2. Technical problem to be solved by the invention

An object of the present invention is to provide a method for controlling a switch to provide an announcement to a subscriber in a synchronous delivery mode in an asynchronous transfer mode interlocked switching system.

3. Summary of the Solution of the Invention

A switch control method for announcement broadcast transmission in an asynchronous delivery mode switching system, comprising: a first step of allocating a switch band in an asynchronous delivery mode switch management block when a request for announcement announcement is sent from a subscriber control block; Connecting the switch in the synchronous delivery mode and the switch in the asynchronous delivery mode and transmitting an announcement broadcast; And a third step of recovering the used switch resource when the announcement is terminated.

4. Important uses of the invention

The present invention is used to transmit announcement to a public telephone network subscriber in an asynchronous delivery mode switching system.

Description

Switch control method for subscriber announcement broadcasting in an asynchronous delivery mode switching system.

The present invention relates to a switch control method for continuously providing an announcement in an asynchronous transfer mode (hereinafter referred to as "ATM") switching system.

In general, a switching system in the form of a synchronous transfer mode (“STM”) for a Public Switched Telephone Network (“PSTN”) subscriber is a time-space-time. Space-Time (hereinafter referred to as "TST") is composed of a switch network.

The software block that controls the space switch to transmit the announcement to the calling subscriber who requested the announcement, allocates both T-switch channels for the calling subscriber and the announcement. The space switch was then connected.

However, in the STM switch network, even though data is not transmitted during the occupied time slots, the channel must be continuously maintained, thereby inefficient and limited type of service has been achieved. Broadband Integrated Information Network (hereinafter referred to as "B-ISDN")

In addition, with the advent of ATM, interworking with the ATM network is essential for the existing STM network, and the ATM switch approach no longer uses the STM time slot exchange method. User data is self-routing through a cell having a payload of length and a Virtual Path Identifier / Virtual Channel Identifier (hereinafter referred to as "VPI / VCI"). )do.

According to the evolution of B-ISDN based on such ATM, PSTN subscriber interworking is required in ATM switching system, and continuous announcement service should be provided even if STM switch is accommodated in ATM switching system.

In addition, for the true evolution to ATM-based B-ISDN, a gradual evolution is desirable in terms of time and economy, and an ATM interworking system is essential for realizing the existing PSTN voice service. Must transmit the existing voice and additional services to the user transparently regardless of the interworking of the network.

That is, in the conventional technology as described above, a switch network of an STM type switching system that provides a PSTN, a narrowband integrated information network (hereinafter, referred to as "N-ISDN") service, is occupied by a time slot occupied by a time slot. Even if the data is not transmitted, the channel must be continuously maintained, resulting in inefficient and limited service, and ATM switch access no longer uses STM time slot switching. Therefore, there is a problem that the PSTN subscriber based on the STM switch is not interworked in the ATM-based B-ISDN.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a method for realizing and controlling two different switches to continuously provide announcement to STM subscribers in an ATM interworking switching system in which an STM switch and an ATM switch coexist. Its purpose is to provide a computer readable recording medium having recorded thereon a program.

1 is an exemplary configuration diagram of an asynchronous delivery mode switching system for accommodating a public switched telephone network subscriber to which the present invention is applied.

2 is a flowchart illustrating an embodiment of a switch connection control according to the present invention;

3 is a flow diagram of an embodiment for band allocation of an access switching subsystem switch when an announcement is requested according to the present invention;

4 is a flow diagram of one embodiment of a switch matching process for connecting a T-switch and a switch-exchange subsystem switch in accordance with the present invention.

5 is an embodiment flow diagram for connecting a T-switch using a given channel in accordance with the present invention.

6 is a flow diagram of an embodiment for connecting an announcement device according to the present invention;

7 is a flow diagram of one embodiment for retrieving switch resources in accordance with the present invention.

In order to achieve the above object, the present invention provides a switch control method for transmitting an announcement in an asynchronous delivery mode (ATM) switching system, wherein when an announcement request is sent from a subscriber control block (ASC), an asynchronous delivery mode switch is managed. Allocating a switch band in the block; Connecting the switch in the synchronous delivery mode and the switch in the asynchronous delivery mode and transmitting an announcement broadcast; And a third step of recovering the used switch resource when the announcement is terminated.

The present invention also provides an asynchronous delivery mode (ATM) switching system having a high-capacity processor, comprising: a first function of allocating a switch band in an asynchronous delivery mode switch management block when an announcement request is transmitted from a subscriber control block (ASC); A second function of connecting a switch of a synchronous delivery mode and a switch of an asynchronous delivery mode and transmitting an announcement broadcast; And a computer readable recording medium having recorded thereon a program for realizing the third function of recovering the used switch resource when the announcement is finished.

That is, according to the present invention, in order to transmit the announcement to the PSTN subscriber, the related software (SW) block operates differently depending on the characteristics of each switch, and performs the connection control of the ATM switch and the STM switch sequentially. .

T-switch channel allocation for announcement broadcasting is allocated from the local switching library block, and the switch connection is made in the interworking switching subsystem (IWS), and the band is allocated for the switch band allocation in the ATM switch. Provides constant bit rate (CBR) information, which is the announcement data characteristic, to the switch connection resource handling (SLRHF), a software block that manages it, and selects appropriate switch port numbers. Receive a routing tag to display. It also assigns a VPI / VCI that identifies the announcement data within the ATM switch.

In order to receive the announcement data from the calling subscriber control block requiring the announcement, T-switch channel is allocated from the local switching library block, and the switch connection is made in the interworking exchange subsystem (IWS). In the switch connection resource handling (SLRHF), an ATM switch band is allocated and a routing tag indicating switch port numbers corresponding thereto is assigned.

Based on the different switch connection information described above, the asynchronous delivery mode interworking module (AIWM), which combines the two switches, provides a control function to map STM switch control information and ATM switch control information to make the data flow transparent. To convert the STM data and interprocessor communication ("IPC") messages into asynchronous delivery mode data adaptation array (ATM Adaptation Layer: "AAL") types 1 and 5, respectively. Asynchronous delivery mode interworking module (AIWM) performs a cell converter (hereinafter referred to as "CLAD") to control the flow so that the announcement is smoothly sent to the calling subscriber.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 to 7.

1 is an exemplary configuration diagram of an asynchronous delivery mode switching system for accommodating a public switched telephone network subscriber to which the present invention is applied. Basically, the Central Switching Subsystem (hereinafter referred to as "ACS") 130 is connected to the present invention. Interworking Subsystem (hereinafter referred to as "ALS") 120, which is a PSTN matching system for accommodating PSTN subscribers (Interworking Subsystem: referred to as "IWS") ( 110 additionally accommodates one or more in each ALS.

The ACS 130 is connected to a central switch link block (hereinafter referred to as "CSLH") 131 and an operation and maintenance processor (hereinafter referred to as "OMP") 132. Consists of.

ALS 120 is a Subscriber Interface Module (hereinafter referred to as "SIM") 121, an ATM switch and Link Block (ATM Switch and Link Block: referred to as "ASLH") 122 , A trunk line matching module (Trunk Interface Module: hereinafter referred to as "TIM") 123, a call connection control processor (hereinafter referred to as "CCCP") 124, CCCP (124) Global Service Control (hereinafter referred to as "GSC") 125, Trunk Control (hereinafter referred to as "TKC") 126, Analog Subscriber Control (hereinafter referred to as "ASC") 127, Switch Link Resource Handling (hereinafter referred to as "SLRHF") (128).

The IWS 110 is an analog line access module (hereinafter referred to as "ALAM") 111, an STM switch time switch module (hereinafter referred to as "TSWM") 112, asynchronous And a delivery mode interworking module (hereinafter referred to as "AIWM") 113 and a signaling service module (hereinafter referred to as "SSM") 114.

ACS 130 performs system-wide maintenance and self-routing switching and synchronizing functions using the same switch element as ALS 120.

The ALS 120 of the ATM switching system mainly handles a call processing function, and a call connection is made by communication between an originating ALS and a destination ALS, and a single stage self routing switch module is built in. And a SIM 121 and a TIM 123 for subscriber and relay line matching.

In addition, the IWS 110 is connected to the switch network of the ALS 120 through an inter module interface (hereinafter referred to as “IMI”), and mainly performs a time slot with an ALAM 111 that performs an analog subscriber matching function. It is located between the TSWM 112 that performs the exchange function, the SSM 114 that performs the voice announcement service, the PSTN matching unit and the ATM switch, and performs AAL 1 processing on user information and IAAL function on IPC messages. It consists of the AIWM 113.

The software blocks for the ATM-linked PSTN subscriber recording guidance function are stored in the ALS 120 and the IWS 110, respectively.

In the present invention, the calling subscriber requesting the announcement is located in IWS 1 and the actual announcement device is located in IWS 2 of the same ALS 120. Since IWS 1 and IWS 2 are in the same ALS 120, routing to the ACS 130 switch is unnecessary, and thus, a routing tag is assigned in its own ALS 120.

2 is a flowchart illustrating an embodiment of a switch connection control according to the present invention. When an announcement request is sent from an ASC block 201, the GSC 125 block is an announcement broadcast switch band from an ATM switch management block. A routing tag according to the assignment is given (202), this information is transmitted to the block requesting announcement and corresponding ALS switch information is received (203).

Based on this information, a request for the connection between the ALS switch and the T-switch is performed (204), followed by a T-switch connection for the announcement broadcast transmission (205).

When a T-switch connection is reported from Time Switch Processing (hereinafter referred to as "TSP") (206), the announcement device is connected (207), and the announcement device operation starts from the GSP. If it is reported (208), the call block requesting the announcement broadcast requests the IWS connection in the same manner as the announcement broadcast block (209).

If it is reported that the announcement is terminated from the Global Service Processing (hereinafter referred to as "GSP") (210), the announcement block reclaims all switch resources used so far (211).

3 is a flow diagram of an embodiment for band allocation of an access switching subsystem switch when an announcement is requested according to the present invention.

Obtaining the required announcement number from the signal data (301), if the announcement number is within the currently provided category (302), querying the announcement device status (304), otherwise (303) and failing the announcement. The announcement is sent to the announcement request block, and if the device status is abnormal, the announcement announcement failure is also transmitted to the request block (305).

If the device state is normal, a processor number, a time slot, an IWS number of an outgoing signal to be used later is stored (306), and a number and type information for the requested announcement is stored (307). The announcement block stores information indicating that the current processing state is ALS connection (308), and the time slot of the T-switch to which the announcement is transmitted based on the sub-highway information allocated to the announcement. (309) and then set the 3 seconds, which is the time from the announcement request to the announcement start transmission (310) and the T-switch rear end for the announcement transmission to the outside of IWS 2 The channel number is allocated from the subscriber library (311).

In the ALS switch, a VPI / VCI is allocated for recognition of announcement data (312) and a channel is stored for later use (313).

Information on an interface module (IM) number, a link number, and a connection type is obtained based on the IWS on which the announcement broadcasting device is mounted (314). Based on this information, the routing tag is allocated from the switch management block of the ALS (315).

If the routing tag generation result 316 is abnormally allocated, release the announcement channel (317), report the announcement failure to the calling block (318), and if the normal allocation, stores the routing tag information (319), The time slot, VPI / VCI, and routing tag information related to the announcement is transmitted to the counterpart block (320).

4 is a flowchart illustrating a switch matching process for connecting a T-switch and a connection exchange subsystem switch according to the present invention. After receiving the information related to the call signal from the call signal block, the call register number is obtained. (401), after checking the limited range of this registration number (402), if not exceeding the range, accumulate announcement time slot information for information management in itself (403), and record from the announcement device to the T-switch. In operation 404, a channel number is stored and a channel number is stored if a channel exists (405).

Check the outgoing channel status (406) and if it is normal then store the flag as true (407) for later information management and store the registration number and channel number (408) and change the current status to the T-switch. Leave it connected (409).

If the outgoing channel is not normal, the previous channel is allocated (410), the flag is set to false (411), and the current connection state is marked as an exception (412). The VPI / VCI 413 of the announcement and the VPI / VCI 414 of the outgoing call are respectively stored and transmitted to the IWP, which is a matching processor, for connection of the two channels (415).

FIG. 5 is a flow diagram of an embodiment of connecting a T-switch using a given channel according to the present invention. Investigating whether the current registration number is a valid registration number (501) and checking if the T-switch connection is possible (502). If possible, the terminal stores information related to the T-switch, such as the direction of the T-switch connection, the announcement channel number (503), and requests the connection to the T-switch of the IWS 2 (504).

6 is a flow chart of an embodiment for connecting an announcement device according to the present invention. After receiving a report that a T-switch for transmitting announcement is connected from a TSP, the announcement block obtains a related registration number from this information. (601) Check if the registration number is within the prescribed range (602) and check if the current T-switch connection is terminated (603) and if it is terminated, put the current state into the device connection state (604) and the required announcement number And time slot number, internal serial number, etc. (605). The stored information is requested to the GSP for device connection (606).

7 is an embodiment flow diagram for retrieving switch resources in accordance with the present invention, which checks whether the currently used registration number is useful (701) and examines whether the current T-switch connection is in a connected state (702). If it is, it stores information for the T-switch release (703), obtains the connection direction information (704) and requests the T-switch release to the TSP (705).

In addition, the related announcement channel information is obtained (706), the channel is released (707), and the VPI / VCI is also released (708). Since the current IWS 2 does not recognize that the announcement has ended, it obtains previously stored information for this purpose (709) and requests the IWP to unregister the IWS 2 (710).

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

According to the present invention as described above, by controlling the switch for transmitting the announcement broadcast to the PSTN, N-ISDN subscriber in the ATM switching system, the existing public switched telephone network, narrowband integrated telecommunication network subscribers are public switched telephone network, narrowband The recording guidance service provided when the integrated information network was an independent network can be continuously provided regardless of interworking with ATM switches that accommodate different switch operations.

Claims (9)

A switch control method for transmitting an announcement in an asynchronous transfer mode (ATM) switching system, A first step of allocating a switch band in an asynchronous delivery mode switch management block when an announcement broadcast request comes from a subscriber control block (ASC); Connecting the switch in the synchronous delivery mode and the switch in the asynchronous delivery mode and transmitting an announcement broadcast; And The third step of recovering the used switch resources when the announcement is terminated Switch control method for transmitting the announcement including a. The method of claim 1, The first step is, A fourth step of obtaining a requested announcement number from signal data and determining whether the announcement number is within a currently provided range when a request for broadcasting announcement is received from a subscriber control block (ASC); As a result of the determination in the fourth step, it is determined whether the announcement number is within the currently provided range, and if the announcement is not within the range, an announcement failure is sent to the announcement broadcast request block; A fifth step; A sixth step of, if the device state is not normal, transmitting the announcement failure to the announcement request block, and if the device state is normal, storing the information of the outgoing signal and the information about the requested announcement; A seventh step in which the announcement block is assigned a channel number and stores the channel; An eighth step of allocating a routing tag from a switch management block of the access switching subsystem (ALS) and determining whether the routing tag generation result is normal; A ninth step of releasing the announcement channel if the routing tag generation result is abnormally allocated as a result of the determination of the eighth step; And A tenth step of storing routing tag information and transmitting information related to announcement broadcast to the counterpart signaling block when the routing tag generation result is normal; Switch control method for transmitting the announcement including a. The method of claim 1, The second step, A fourth step of matching the asynchronous delivery mode switch with the synchronous delivery mode switch; A fifth step of requesting the synchronous transfer mode switch connection; And Sixth step of connecting the announcement device and transmitting the announcement Switch control method for transmitting the announcement including a. The method of claim 3, wherein The fourth step, A seventh step of obtaining a call register number by receiving information related to the call signal from the call signal block, and determining whether the registration number exceeds a limited range; An eighth step of terminating if the range is exceeded, accumulating announcement time slot information if the range is not exceeded, and determining whether there is a channel for transmitting a recording; A ninth step of terminating if the channel does not exist as a result of the determination of the eighth step, and storing the transmission channel number if the channel exists, and determining whether the transmission channel state is normal; A tenth step of designating a current state as a synchronous transfer mode switch connection state if the transmission channel state is normal as a result of the determination in the ninth step; An eleventh step of designating a current connection state as an exception state if the transmission channel state is not normal as a result of the determination in the ninth step; And 12th step of storing the identifier of the announcement and the identifier of the outgoing call, respectively, and transmits it to the matching processor (IWP) Switch control method for transmitting the announcement including a. The method of claim 3, wherein The fifth step, A seventh step of checking whether the current registration number is a valid registration number and ending if it is not a valid registration number, and if the registration number is valid, determining whether the synchronous delivery mode switch connection is possible; And As a result of the determination of the seventh step, if the synchronous delivery mode switch connection is not possible, it is terminated, and if possible, the information related to the synchronous delivery mode switch is stored and connected to the synchronous delivery mode switch of the interworking exchange subsystem (IWS). 8th step requiring Switch control method for transmitting the announcement including a. The method of claim 3, wherein The sixth step, A seventh step in which an announcement block reports the synchronous delivery mode switch connection; An eighth step of connecting the announcement device; And When the announcement device starts to operate, the ninth step of requesting interworking exchange subsystem (IWS) connection is the same as the announcement block in the call block requesting announcement. Switch control method for transmitting the announcement including a. The method of claim 6, The eighth step, A tenth step of obtaining the associated registration number for the announcement broadcast block and determining whether the registration number is within a prescribed range; An eleventh step of determining whether the synchronous transfer mode switch connection is terminated if not within a prescribed range as a result of the determination in the tenth step; And As a result of the determination of the eleventh step, if the synchronous transfer mode switch connection is terminated, the process is terminated. If the connection is terminated, the current state is designated as the device connection state, and the requested announcement number, time slot number, and internal serial number are assigned. A twelfth step of requesting a device connection with the stored information. Switch control method for transmitting the announcement including a. The method of claim 1, The third step, A fourth step of receiving the announcement block that the announcement has ended; A fifth step of determining whether the currently used registration number is useful, if it is valid, terminating if it is valid, and if not, determining whether the synchronous delivery mode switch is currently in a connected state; A sixth step of terminating the unconnected state as a result of the determination of the fifth step, storing information for releasing the synchronous transfer mode switch if connected, and requesting releasing the synchronous transfer mode switch; And A seventh step of releasing the announcement channel, the identifier, and requesting disassociation from the interworking exchange subsystem Switch control method for transmitting the announcement including a. In an asynchronous delivery mode (ATM) exchange system with a large processor, A first function of allocating a switch band in an asynchronous delivery mode switch management block when an announcement broadcast request comes from a subscriber control block (ASC); A second function of connecting a switch of a synchronous delivery mode and a switch of an asynchronous delivery mode and transmitting an announcement broadcast; And A third function of recovering used switch resources when the announcement is terminated A computer-readable recording medium having recorded thereon a program for realizing this.