KR950010492B1 - Digital subscriber signalling system for an electronics exchanger - Google Patents

Abstract

scattering general affirs; transferring DSS1-class message; transferring display content of call rejection to the DSS1-class; transferring the composed DSS1-class message; and transferring a call process situation display information.

Description

Control Method of Generating Digital Circuit Call Subscriber Information in Electronic Switching System

1 is a schematic control structure diagram of an electronic switching system which is a distributed control system.

2 is a block diagram of display information provided to a digital circuit subscriber in an electronic switchboard.

3 is a flow diagram of presentation information processing provided to a digital circuit subscriber in an electronic switchboard.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display information control method for generating display information provided to a digital circuit subscriber by an electronic switching system in voice or non-voice call control between digital circuit subscribers of an all-electronic switching system.

At present, many kinds of networks exist such as telephone network, teletex network, data communication network and packet network. Each network is developed independently and provides only one type of service, and lacks compatibility between networks. In addition, each network is realized with individual protocols, speeds, standards, and circuit standards. Due to legal issues and limitations of analog technology, many networks have difficulty in interworking.

In order to solve the above problems, a more economical, high quality, and broader communication base has been required to establish a wider communication base. To this end, the concept of an Integrated Service Digital Network (ISDN), which allows users to receive a wide range of services using a limited standardized multipurpose matching device, has emerged. Global protocols have been defined.

In order to establish ISDN in Korea and provide various services to ISDN users, the introduction of DSS1 (Digital Subscriber Signaling System No. 1) and the application of new technology development are inevitable. In the delivery of the call progress of the existing network to the subscriber, it is nothing but a message transmission that informs the invent tone, announcement or simple call progress. In this method, it is difficult to clearly convey the contents of ongoing calls, released calls, and supplementary service information to the user due to the tone type provided by the network, lack of information resources, and the user's inconvenience is essential. .

Implementing DSSI Network Layer 3, which is defined as a protocol between the network and the user, for establishing and securing digital circuit subscribers in an electronic switching system to be used as a node of ISDN, the electronic switching system recommended by the International Telegraph Telephone Conference (CCITT) It can be a node of ISDN.

Accordingly, an object of the present invention is to adapt to changes in the ISDN user-network interface specification in the future and to minimize the modification of the existing call processing software system in the electronic switching system, and from the DSSI network layer 3 network to the digital circuit subscriber. The present invention provides a method of controlling display information generation in an electronic switching system that generates display information elements used for visual information transmission.

In order to achieve the above object, the present invention provides a first step of performing a branching process according to the creator of the call control message received for each call processing state, a second step of performing the processing of the information element of the DSS1 layer 3 release source; A third step of processing an internal call release cause of the electronic switching system and display information, a fourth step of processing display information for each progress such as a DSS1 layer 3 progress information element, and a processing step for processing display information of additional service information; It is carried out with five steps.

Electronic switchboards use display information to provide users with audible tones in a visual way as well as audible tones or announcements to inform digital circuit subscribers of a call's progress in the network. The display information provided to the user in the electronic switchgear follows the configuration of the display information of DSSI network layer 3 recommended by the CCITT. It can inform the status of call processing, additional service application, and other subscriber's coping situation.

The present invention is a block, which is a software design unit of an electronic switching system, in which a function of digital line subscriber control is realized, which is generated by a method of generating display information according to the progress of a call, an error of a digital line subscriber, or a lack of resources in the system. Create display information in an electronic switching system where the electronic switching system generates display information used to inform digital circuit subscribers in a visual way of the cause of call cancellation, additional service application, and the situation of TDX-10 system. The control method is implemented.

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

1 is a schematic control structure diagram of an all-electronic exchanger which is a distributed control system.

As shown in the figure, the electronic switching system to which the present invention is applied is composed of three sub-systems: AAS (Access Switching Subsystem), INS (Interconnection Network Subsystem), and CCS (Central Control Subsystem).

ASS is classified into ASS_S (Subscriber), ASS_T (Trunk), and ASS_7 (No.7 Signaling System) according to the function.In ASS_S, the call processing function for subscribers accommodated in the exchange is represented by an access switching processor (ASP). The interworking trunk line call processing function was accommodated by ASP. In ASS_7, the No.7 signaling message transfer part (MTP) and the signaling connection control part (SCCP) function ASP and SMAH (Signalling Message Handling). Processor) is performed.

In INS, Number Translation Processor (NTP) and Interconnection Network Processor (INP) perform the number translation function, route control function, and space division switch control function, which are commonly required in each ASS, and CCS operates and maintains the system. The function is performed.

Each of the subsystems is connected to the INS through LDL (Local Data Link) to form a system internal communication network between processors. The electronic switch digital line subscriber indication information generator is implemented in a software block DCC (Digital Subscriber Circuit Call Control) mounted in an ASP belonging to a line and trunk access subsystem (LTAS) in ASS_S.

2 is a block diagram of display information provided to a digital circuit subscriber in TDX-10.

In the electronic switching system, a configuration combination of display information composed of DSSI layer 3 messages and provided to digital circuit subscribers is shown in the figure. In the electronic switching system, the display information used for visual information transmission to the digital circuit subscriber is transmitted through the display information element of the DSSI layer 3 message, and the subscriber terminal displays the received display information on the liquid crystal panel installed in the terminal. do. The maximum length of the indication information transmitted to the digital circuit subscriber is 48 characters in consideration of the size and performance of the IPC (Inter-Processor Communication) of the electronic switching system.

ASCII code is used as the basic character of the display information, and KSC-5601-1987, a government-defined two-byte completion Korean / Hanja / special symbol code, is additionally used for ISDN users in Korea.

The presentation information delivered to digital line subscribers is divided into two parts of 24 characters each, and the top 24 characters are used for displaying the call progress, the cause of call cancellation, and the caller / destination number. The lower 24 characters are used by the electronic switching system. It is used to indicate the expected response to the subscriber.

The information to be delivered on the electronic exchange is as shown in 1), 2), 3) below, and it designates the index consisting of English and numbers to distinguish each content. In order to select the display information, the network layer 3 timer and the inter-exchange internal call processing timer, the interworking state of the call, and the call release cause of the subscriber or the electronic exchange itself are selected. Therefore, the response that the electronic switchboard expects to the digital subscriber is required, and a combination of indication information appropriate for each condition is made.

1) Display of call progress

2) Contents of the release situation

3) indication of the expected response from the electronic switchboard to the subscriber of the digital circuit;

3 is a flow diagram of display information processing provided to a digital circuit subscriber in the electronic switchboard of the present invention.

The generation of indication information only occurs when a layer 3 message is delivered to a digital circuit subscriber in the network, the call status in the network, a layer 3 message received from the digital circuit subscriber, a timer termination associated with the DSS1 layer 3, a call processing timer. Generation of indication information upon termination and receipt of call processing messages shall be made. When generating display information, it is decided whether to apply display information in ASCII code or KSC-5601-1987 code as a judgment variable of the database.

3 (a) is a flowchart illustrating processing of a call control message received for each call processing state.

The flow chart shown in the figure shows that a call control message received for each call processing state in a network includes CROS (Concurrent Realtime Operating System), DCC, ISDN User Part (ISP), Digital Circuit Subscriber, Analog Subscriber Control (ASC), and TKC. (Trunk Control), Telephony User Part (TUP), NTP or SNC (Switching Network Control) analysis (001) messages from interworking call processing blocks or DSS1 layer 3 messages received from subscribers, set call control timers, or According to the termination of the DSS1 network layer 3 timer and the additional service registration and progress, the following processing proceeds.

3 (b) is a flowchart corresponding to display information correspondence of an information element that causes DSS1 layer 3 release.

Receiving 101 of DSS1 network layer 3 timer termination that DCC has registered with CROS, receiving 102 call failure or digital origination / release call notification from the DCC or ISUP block, 102, or disconnection, release from digital circuit subscriber, or Upon receiving (103) a DSS1 layer 3 message in a state, it is determined (104) whether the display information is to be composed in English or Korean. In operation 105, the display information of the call release situation of FIG. 2 corresponding to the DSS1 layer 3 release cause is selected and converted into the display information of the release cause. Through the procedure of determining and configuring the DSS1 layer 3 message type sent to the subscriber (106, 107), the DCC sends (108, 109, 110) a DSS1 layer 3 message that has been truncated, released, or released.

3 (c) is a flowchart of processing according to the cause of internal call release of the electronic switching system and the correspondence of the display information.

DCC registers CROS internal call control timer termination (201), receives ASC, TKC, or TUP block from call failure or incoming / release call notification (202), and receives switch abnormal notification from SNC block. (203) Or, when receiving the wrong station number and wrong number notification from the NTP (204), it is determined whether or not the display information is to be composed in English or Korean (205). The display information of the call release situation of FIG. 2 corresponding to the cause of the call failure is selected and converted into display information of the cause of release (206). A procedure of converting to cause information, which is a component of DSS1 layer 3 transmitted to the subscriber, 207, and determining and configuring a message type 208, 209 is performed. DCC fails to access database of digital line subscriber, system overload, incoming subscriber absent, denial of incoming subscriber, notification of change of number, error, wrong number, prohibition of incoming / outgoing call, switch abnormality, release of incoming / outgoing subscriber, caller caller, etc. The indication of is transmitted in the DSS1 layer 3 truncation 210 or release complete 211 message sent to the subscriber.

FIG. 3 (d) is a process flow diagram corresponding to display information according to progress such as DSS1 layer 3 call progress information element.

The DCC recognizes the interworking matter by receiving a signaling method notifying the interworking of the Public Switched Telephone Network (PSTN), TUP, ISUP, etc. from the call control block (303, 304, 305) or the progress indication message (301, 301) as shown in the flowchart 3 Then, it is determined whether the display information is configured in English or Korean (306,307,308,309). The display information 310, 311, 312, 313 corresponding to the DSS1 layer 3 progress indication message or the call progress message is selected to configure the DSS1 layer 3 message to be transmitted to the subscriber (314, 315, 316, 317). The DCC sends the configured DSS1 layer 3 message to the subscriber (318, 319, 320, 321).

FIG. 3 (e) is a flowchart of processing corresponding to display information of additional service information.

DCC receives call setup or information messages from digital circuit subscribers (401, 402), originating information, TUP switch connection notifications, or digital incoming subscriber response notifications (403, 404, 405) from interworking DCC, ISUP, and TUP blocks. It is determined whether to configure the display information to be transmitted to the subscriber in English or Korean (406, 407, 408, 409). The type of additional service to be provided to the subscriber for the additional service registration and additional service request of the subscriber is determined (410, 411, 412, 413). Warm Line (WML), Hot Line (HTL), Abbreviated Dialing (ABD), Calling Line Identification Presentation (CLIP), and Called Line Identification (COLP) The subscriber is provided with the additional service of the presentation and converts the dialing number (DN) into the display information (414, 415, 416). In addition, it performs conversion to the display information of the additional service progress to inform the subscriber of the progress of the provided additional service (417, 418, 419, 420), and configures the DSS1 network layer 3 message to be sent to the subscriber (421, 422, 423, 424), a dash direct telephone, Direct service, and additional service indication information of the speed dial number to the call progress message (425), caller ID indication and display prohibition (CLIR: Calling Line Identification Restriction) The display information of the additional service to the call setup message (427), connection number Indication and Prohibition (COLR: Connected Line Identification Restriction) The supplementary service indication information is a response message or information message (428), and the supplementary service indication information of the Advice of Charge (AOC) is a response message or information message ( 426, 428), and additional service request processing after call establishment is indicated by the call progress status corresponding to the additional service request response by an information message (426). Deliver the information to the subscriber.

Accordingly, the present invention carried out by the above processing procedure, by implementing the display information element generator for generating the display information of the DSS1 network layer 3 in the digital circuit subscriber control unit of the electronic switching system and the call progress situation to the digital circuit subscriber; The cause of the call cancellation and additional service information can be visually informed, so that the electronic switching system can ultimately provide more advanced call service to digital circuit subscribers. The display information delivered to the digital circuit subscriber can reduce the liquid crystal display, which can be additional cost of the terminal by using only 48 characters, which is about half of 80 characters recommended by CCITT, and the terminal separately analyzes DSS1 layer 3 messages. Therefore, a separate service function of informing the subscriber of the information becomes unnecessary, such an effort can be used to reduce the cost and improve the function of the terminal. The display information element generator of the electronic switching system is implemented as part of an independent module structure of the digital circuit subscriber control unit, which is a match between the DSS1 network layer 3 processing unit and the digital circuit subscriber call processing unit. Modification of the relevant function can be done by changing the call processing and adding new display information.

Claims (1)

A connection exchange subsystem (ASS) having an access exchange processor (ASP), a connection network subsystem (INS) having a number translation processor (NTP) and an INP (interconnection network processor), and a central control subsystem (CCS). In the control method for generating digital line subscriber indication information applied to an all-electronic switch, the call control message received by each call processing state in the network is generated by a CROS (Concurrent Realtime Operating System), DCC, and ISUP (ISDN User Part). Messages or subscribers from interworking call processing blocks by analyzing the digital circuit subscriber, Analog Subscriber Control (ASC), trunk control (TKC), telephony user part (TUP), NTP, or Switching Network Control (SNC) (001). A first step of branching according to the DSS1 layer 3 message received from the terminal, the set call control timer or the termination of the DSS1 network layer 3 timer, and additional service registration and progress, and after performing the first step Receiving (101) the end of the DSS1 network layer 3 timer termination registered by the DCC with CROS; receiving (102) a digital call failure or digital origination / release call notification from the DCC or ISUP block; and disconnection, release from the digital line subscriber, or Upon receiving (103) the DSS1 layer 3 message in the state, it is determined whether to display the display information in English or Korean (104). The display information of the call release situation corresponding to the DSS1 layer 3 release cause is selected, Through the process of performing the conversion to the indication (105) and determining and configuring the DSS1 layer 3 message type (106,107) sent to the subscriber (106,107), the DCC transmits (108,109,110) a DSS1 layer 3 message that has been truncated, released, or released. Receiving a call failure or incoming / outgoing call notification from the ASC, TKC, or TUP block (201) of the termination of the electronic call switch internal call control timer registered by CDC in CROS after performing the second step and the first step; (202), SNC block Receiving switch abnormality notification (203) and receiving wrong station number and wrong number notification from NTP (204), it is determined whether to display information in English or Korean (205). Select the display information, perform the conversion into the display information of the cause of release (206), convert to cause information which is a component of DSS1 layer 3 transmitted to the subscriber (207) and determine and configure the message type (208, 209); , DCC is unable to access database of digital circuit subscriber, system overload, incoming subscriber absent, incoming subscriber rejection, number change notification, missing number, wrong number, incoming / outgoing call, abnormal switch, incoming / outgoing subscriber call, caller caller A third step of transmitting a display content such as a DSS1 layer 3 truncation 210 or release completion 211 message to a subscriber; and after performing the first step, the DCC transmits a PSTN (Publi) from the call control block. c Determine whether to configure the display information in English or Korean according to the reception of the signaling method for informing the interworking of Switched Telephone Network), TUP, ISUP, etc. (303, 304, 305) or the interlocking matter in the progress indication message (301, 301). (306,207,308,309), select the indication information (310,311,312,313) corresponding to the DSS1 layer 3 progress indication message or the call progress message to configure the DSS1 layer 3 message to be sent to the subscriber (314,315,316,317), and the DCC subscribes the configured DSS1 layer 3 message to the subscriber. The fourth step (318, 319, 320, 321), and after performing the first step, the DCC receives a call setup message or information message from the digital circuit subscriber (401, 402), the originating information from the interworking DCC, ISUP, and TUP block, and the TUP. Whether the switch connection notification or the digital line subscriber response notification inbox (403, 404, 405) is configured in English or Korean for display information to be sent to the subscriber. Determine (406, 407, 408, 409), determine the type of supplementary service to be provided to the subscriber for supplementary service registrations and supplementary service requests of the subscriber (410, 411, 412, 413), warm line (WML), hot line (HTL) ), A dialing number (DN: Dialing Number) for subscribers who provide supplementary services such as Abbreviated Dialing (ABD), Calling Line Identification Presentation (CLIP) and Connected Line Identification Presentation (COLP). Is converted to the display information (414, 415, 416). It converts the supplementary service progress to the display information (417, 418, 419, 420), constructs a DSS1 network layer 3 message to be sent to the subscriber (421, 422, 423, 424) and displays the supplementary service indication information of the direct dial telephone, direct telephone, and shortcut number. Call message (425), caller ID indication and display prohibition (CLIR: Calling Line Identification Restriction) The display information of the additional service call call message (427), connection number indication and display prohibition (COLR: Connected Line Identification Restriction) additional service The indication information in the response message is 428, the supplementary service indication information in the Advice of Charge (AOC) is the response message or information message (426, 428), and the additional service request processing after call establishment is an information message. And a fifth step of delivering the call progress indication information corresponding to the request for additional service request to the subscriber. Framework once the preferred method for generating subscriber information displayed control.