KR960016667B1 - Full switching system - Google Patents

Abstract

activating the absence announcement service of the corresponding subscriber according to the absence announcement registration request; providing the absence record announcement service for a transmitter; and inactivating the absence announcement service according to the absence announcement service cancellation request from the subscriber after transmitting the call response message and translating the service code.

Description

How to Handle Missing Information Service in Electronic Switching System for Narrowband Telecommunication Network

1 is a schematic structural diagram of an all-electronic exchanger which is a distributed control system to which the present invention is applied;

2 is a process flowchart for activating a service by receiving a service registration request from a subscriber station according to the present invention;

3A and 3B are flowcharts of incoming and outgoing subscriber control processing of an exchange when a call is received from any subscriber having a service activated according to the present invention;

4 is a process flowchart of deactivating a service by receiving a service cancellation request from a subscriber station according to the present invention.

* Explanation of symbols for main parts of the drawings

101: connection exchange subsystem 102: internal network subsystem

103: central control subsystem

The present invention is a subscriber (basic match subscriber, primary group match subscriber, basic access subscriber) that satisfies the N-ISDN user-network access signaling method in an electronic switch for a narrowband integrated telecommunication network (hereinafter referred to as "N-ISDN"). The present invention relates to a method for processing an absence guide service by an audible and visual method for multiple subscribers.

Until now, the public telephone network (PSTN) has provided an out-of-office guidance service using an analog connection method for subscribers using a telephone. In the public telephone network, the signal transmission channel between the subscriber and the network is not provided separately, so only a limited level of service can be provided by the audible sound through the information transmission channel, and the public telephone network and the N-ISDN have different connection specifications between the subscriber and the exchange period. The prior art is not applicable to N-ISDN. In addition, since the conventional technology is provided to subscribers using only audible sound, it is not possible to provide a service to data mode terminals other than a telephone, and thus, a new technique is required to provide services for all N-ISDN access terminals such as telephone and data. -As with other telecommunication service subscribers, ISDN subscribers may not be able to receive incoming calls for short and long periods of time. In this case, the calling subscriber may not know the exact state of the incoming call and may continue to try to call the missed subscriber or may not try the call even when the incoming call can be received. In addition, there was a problem in that the side of the exchange must perform unnecessary processing for the call service which is incomplete due to an incoming call.

The present invention devised to solve all the problems with the prior art, all the incoming call during the time when the subscriber registers the absent time in the N-ISDN connected to the electronic exchange to which he is connected when he is absent An object of the present invention is to provide a method for processing an absence guide service that notifies the calling party of an absence and an absence time.

In order to achieve the above object, the present invention, in the missed guidance service processing method applied to the electronic switch, when receiving a call setup message from the subscriber sends a call setup response message and receives a service request information message from the subscriber service code A first step of activating the absence guidance service of the subscriber in response to the request for registering the absence guidance service after translating the translation; When the call is requested to the missed information service subscriber, it is judged whether it is the own call and if it is the own call, it retrieves the absence time information and notifies the incoming call. A second step of providing a recording guide service; And upon receiving the call setup message from the subscriber, sends the call response message, receives the service request information message from the subscriber, translates the service code, and deactivates the missed announcement service according to the request for canceling the absence guidance service from the subscriber in the service activation state. It includes a third step.

The missed announcement service provides users with convenience of users by preventing unnecessary call retries by providing intelligent information that informs subscribers of N-ISDN that they are away and the time they are away. This service can reduce the load on the system.

The present invention is an implementation method for the overall matters to be processed in the electronic switch for N-ISDN, that is, service registration, confirmation, cancellation, and service provision for providing an absence guidance service to the N-ISDN subscriber.

The gist of the present invention is that all procedures of N-ISDN for this service are identical to the case of setting up general call when connecting the electronic switch and terminal equipment for N-ISDN and do not use any additional message or information element for all current N-ISDN. The terminal can be used without the addition of functions and can be easily applied to all the electronic switchboards using the N-ISDN subscriber-network access standard of the international standard.

In addition, the service provides visual information by using the D-ISDN subscriber-network signaling method using the D-channel as well as the conventional audible sound when registering, confirming, canceling, and calling a subscriber to the service. In addition, it can also provide the subscriber with the necessary information.

Hereinafter, with reference to the accompanying drawings will be described an embodiment according to the present invention;

1 is a schematic structural diagram of an all-electronic exchanger which is a distributed control system to which the present invention is applied.

The electronic switching system consists of three subsystems: an Access Switching Subsystem (ASS) 101, an Interconnection Network Subsystem (INS), and a Central Control Subsystem (CCS). It is composed.

The access exchange system 101 is classified into ASS_S (Subscriber), ASS_I (ISDN Subscriber), ASS_T (Trunk), and ASS_7 (No.7 Signaling System) according to functions, and in ASS_S, a call processing function for a subscriber accommodated in an exchange The access switching processor (ASP), the call processing function for the ISDN subscriber housed in the exchange at ASS_I, the access switching processor (ASP), the inter-station circuit call processing function accommodated at the ASS_T, and the No.7 signaling method at the ASS_7. ASP and Signaling Message Handling Processor (SMHP) perform the functions of the message transfer part (MTP) and the signaling connection control part (SCCP).

In the internal network subsystem 102, a number translation function, a routing control function, and a space division switch control function, which are call processing functions that are commonly required in each connection exchange subsystem 101, include a number translation processor (NTP) and an interconnection network processor (INP). , Respectively, and the central control subsystem 103 performs the operation and maintenance functions of the system.

Each subsystem is connected to an internal connection network subsystem 102 via a local data link (LDL) to form an interprocessor internal communication network.

2 is a flowchart of an operation in which an electronic switchboard receives a service registration request from a subscriber to activate a service.

This processing software is implemented in ASS_I, an N-ISDN subscriber control module, and is performed in an additional service processing module like other service registration and cancellation.

When receiving a call setup (SETUP) message from the subscriber (201), the call setup response (SETUP ACK) message is sent after the call acceptance process (202).

Upon receiving the service request information message (INFORMATION) from the subscriber (203), the service code is translated (204). When entering the service code, the subscriber must first enter a two-digit service code followed by a special digit "*" indicating separation and registration from the general call. If the translation result is a request for registration of the absence guide, the subscriber's category is examined (205). If the subscriber is not allowed to register, the user is notified that the registration is not possible using the DISCONNECT message, and is released from the subscriber. When the RELEASE message is received, the call is released according to the general call release procedure of releasing the call by sending a RELEASE COMPLETE message (206).

In the case of the service registration request from the allowed subscriber, the service time is received using the additional information message (207). The service time uses two digits for the month, day, hour, and minute information, respectively, and includes "*" at the end of the information as an end indicator of the information. When the received time information is analyzed and is an abnormal value (when the information of the month is not 1 to 12, the information of the day is not 1 to 13, and the information of the hour is not 0 to 23, the information of the minute is 0 to If not 59), the requesting subscriber is informed using the DISCONNECT message and the call is released using the N-ISDN subscriber-network signaling procedure (206). If the subscriber wants to use the month and day information as the current time, the input of the month and day information may be omitted.

If the received time information is valid, it saves the registration time, activates the subscriber's out-of-office guidance service (209), informs the subscriber that the service has been registered using the DISCONNECT message, and initiates the N-ISDN subscriber-network signaling procedure. Release the call (206).

3 is a flowchart illustrating a process of requesting an incoming call to a subscriber whose missed notice service according to the present invention is activated.

3A is a processing flowchart of the subscriber side in which the absence guidance service is activated.

When an incoming call is requested (301), the incoming subscriber status is examined to determine whether the missed announcement service is activated (302). If it is not activated, it performs normal incoming call processing. If it is activated, it performs missed service.

Investigate whether the calling party and the called party are subscribers connected to the same exchange (303). If the calling subscriber and the called party are connected to the same exchange, the internal message in the exchange is used to obtain the absence and missed time information of the incoming call (304). The side is notified of the absence (305) and terminates the incoming call.

If the calling party is a different exchange from the called party, i.e., a relay call, the calling party cannot be notified of the absence of the incoming party due to signaling restrictions. In this case, the incoming call is notified of the missed announcement through the information transmission path (307) and a virtual response message is notified to the calling party for this purpose (306) to connect the information transmission channel of the calling party. When the release message is received from the calling party during the absence guide transmission (308), the recording guide transmission is disconnected (309) and the incoming call ends.

3B is a process flow diagram of an originating exchange.

If the subscriber who attempted the call is a subscriber belonging to the same exchange for N-ISDN (in case of his / her own call), the user receives 310 the missed service and the missed time information from the incoming to the internal message. When the outgoing processing unit receives the incoming missed notification, the outgoing time information received from the called party is notified to the calling subscriber through the announcement broadcasting device through the announcement broadcasting device (e.g., "The number currently dialed is 00 00 00 00 00 00 because the subscriber is absent. Please call again ") and display the information on the DISCONNECT message, which is a disconnect message according to N-ISDN user-network layer 3. Transmits "Called Absent [M: 00 D: 00 H: 00 M: 00]" (312). Accordingly, the calling party subscriber can know that the called party is absent and the absence time information through the audible sound and the display device on the terminal. Accordingly, when the subscriber recognizes the state of the called subscriber and releases the call through the audible sound and the display device, the subscriber station and the exchange release the call according to the N-ISDN subscriber-network release procedure (313).

4 is a process flow in which the electronic switchboard receives the service cancellation request from the subscriber and cancels the service.

If a SETUP message is received from the subscriber (401), the call setup response (SETUP ACK) message is transmitted after the call acceptance process (402).

When the service request information (INFORMATION) message is received from the subscriber (403), the service code is translated (404). When transmitting a service code, a subscriber must first enter a special digit "#" indicating the purpose of separation from the general call and the cancellation of service, followed by a two-digit service code. The service code is the same as in the registration request. If the translation result is a request for cancellation of the absence notice, the subscriber's category is examined and if the subscriber is not active, the subscriber is notified that the cancellation is not possible using the DISCONNECT message and the call is released according to the call release procedure. (406).

In the case of the minimum request from the subscriber in the service activation state, the subscriber's missed announcement service state is deactivated (405) and the subscriber is informed that the service has been canceled using the DISCONNECT message (407) and the N-ISDN subscriber-network signal The procedure is used to release the call (408).

Therefore, the above-mentioned missed guidance function for the N-ISDN subscriber can be applied to the private exchange system for N-ISDN as well as the national, and according to the simple registration procedure through the terminal device when the subscriber connected to the N-ISDN exchange is needed. If the user registers his or her absence time to the exchange, the exchange may be provided with a service that informs the calling party of the absence and the absence of the incoming call through the wife broadcasting and the display device of the terminal for all incoming calls.

The present invention is applicable to all N-ISDN exchangers using N-ISDN subscriber-network signaling of the International Standard (CCITT), and the N-ISDN terminal can receive a service without adding an existing function. It works.

Claims (4)

In the missed guidance service processing method applied to the electronic switch, when the call setup message is received from the subscriber, the call setup response message is sent, the service request information message is received from the subscriber, the service code is translated, and the missed guidance service registration request is received. According to the first step of activating the absence guidance service of the subscriber; When the call is requested to the missed information service subscriber, it is judged whether it is the own call and if it is the own call, it retrieves the absence time information and notifies the incoming call. A second step of providing a recording guide service; And upon receiving the call setup message from the subscriber, sends the call response message, receives the service request information message from the subscriber, translates the service code, and deactivates the missed announcement service according to the request for canceling the absence guidance service from the subscriber in the service activation state. And a third step. The method for processing an out-of-office guide service in an all-electronic switching system for a narrowband integrated telecommunication network. The method as claimed in claim 1, wherein the first step includes: if a call setup message is received from the subscriber, the call setup response message is transmitted after the call acceptance processing; and if a service request information message is received from the subscriber, the service code is translated to translate the result. Determining whether the service can be provided by examining a category of the subscriber when the request is a registration request for the absence guide; As a result of the determination of the above step, if the service is not provided, notifying the subscriber that the registration is impossible using a disconnect message, and transmitting a release completion message upon receiving the release message from the subscriber to release the call; And as a result of the above determination, if the service can be provided, after receiving the absent time information and analyzing the time information, it is determined whether the information is valid information. Release the call, if the received time information is valid, store the registration time, activate the missed announcement service of the subscriber, inform the subscriber that the service has been registered using the truncation message, and use the signaling procedure Missing guidance service processing method in an electronic switch for a narrowband integrated telecommunications network comprising the step of releasing. The method according to claim 1 or 2, wherein the step 2 includes: determining, by the called side exchange, whether the missed announcement service is activated by examining the called subscriber status when an incoming call is requested; As a result of the determination of the step, if the absence guidance service is not activated, performing normal incoming call processing, and if activated, checking whether it is a local call; As a result of the investigation in the above step, if it is a native call, it uses the internal message in the exchange to obtain the missed and missed time information and informs the caller that the called party is absent and releases the incoming call. Notifying the missed announcement to the calling party and receiving a release message from the calling party; And the calling side exchange receives the missed service of the incoming call from the called party and receives the missed time information and informs the calling subscriber by announcement and sends the missed time and the missed time information to the display information element of the truncation message. And a step of notifying the release of the call and releasing the call. 4. The method of claim 3, wherein in the third step, when a call setup message is received from the subscriber, the call setup response message is sent after the call acceptance processing is performed, and when a service request information message is received from the subscriber, the service code is translated to translate the result. Examining the subscriber's category when is the request for cancellation of the absence guidance; As a result of the investigation of the above step, in the case of the subscriber who is not active in the service, notifying the subscriber that the cancellation is impossible using a disconnect message and releasing the call according to the call release procedure; And as a result of the above investigation, in case of a cancellation request from the subscriber in the service activation state, deactivating the subscriber's absence guidance state and notifying the subscriber that the service has been canceled by using the disconnect message and releasing the call using the signaling procedure. A method for processing an out-of-office guidance service in an all-electronic switching system for a narrowband integrated telecommunications network, comprising: a step.