KR100198925B1 - Transmission digital call processing method for switching system - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

Outgoing Digital Subscriber Call Control Method for Setting Local Call Designation Path in Electronic Switching System

2. The technical problem to be solved by the invention

The operator's request is required to confirm the connectivity of digital subscriber terminals by the functions of time switch and space switch, DSS1 signaling procedure of digital subscriber station, and audible call between incoming and outgoing subscribers. To provide outgoing digital subscriber call control method for local call designation path that can be performed by

3. Summary of Solution to Invention

Select the available channels and timeslots for the digital subscribers that the calling control CTPS process occupies, and when the incoming control is requested by the incoming control CTPS process to receive the response signal, the transmission characteristic information and the progress for the call setup of the calling digital subscriber are received. After setting up the call setup message by designating the information of the indicator, sending it to the calling digital subscriber and receiving the response.

4. Important uses of the invention

It is used to establish the designated path of digital subscriber's home call at the electronic switchboard.

Description

Outgoing Digital Subscriber Call Control Method for Local Call Designation Path in Electronic Switching System

The present invention provides a space-switch and a time switch (system switch) that are system resources through an operator's man-machine command (MMC) command in an electronic switch used as a node of an integrated service digital network (ISDN). The present invention relates to a method for controlling an outgoing digital subscriber call for normal function operation of a time-switch, a function check of a normal signal processing procedure of a voice service terminal, and an audible call between originating and receiving digital subscribers in a local station.

At present, there are many kinds of networks, such as telephone network, teletex network, data communication network, packet network, etc., and each network is developed independently and supports only one type of service, thus lacking compatibility between networks. In addition, each network is realized with individual protocols, speeds, standards, and circuit standards, which causes difficulties in interworking between networks due to legal problems and limitations of analog technology.

To solve the above problems, a more economical, high-quality, and inter-communication communication category was required to build a wider communication base. To this end, users could receive a wide range of services using a limited standardized multipurpose matching device. The concept of an integrated telecommunication network has emerged.

In order to implement this concept, a global protocol for interworking between the network and users has been defined, and the introduction of DSS1 (Digital Subscriber Signaling System No. 1) and the new digital system to establish ISDN and provide various services to ISDN users in Korea. A call control method for a subscriber was required.

Accordingly, the present invention is applied to digital subscriber lines of Basic Subscriber Interface (BSI), Basic Access Multiplex Interface (BAMI), and PSI (Pramary Subscriber Interface), which are mounted on an electronic switch in an electronic switch that is used as a node of an integrated telecommunication network. As with the existing analog subscribers, the operator checks the functions of system resources such as time-switch and space-switch, DSS1 signaling procedure of digital subscriber station, and audible call between incoming and outgoing subscriber. The purpose of the present invention is to provide an outgoing digital subscriber call control method for the local call designation path that can be performed by the request of the local call.

1 is a schematic control structure diagram of a distributed control electronic switching system to which the present invention is applied;

2A through 2C are flow charts of an outgoing digital subscriber call control method for configuring a local call designation path according to the present invention;

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

1 is a schematic control structure diagram of a distributed control electronic switching system to which the present invention is applied.

As shown in the figure, the distributed control electronic switching system to which the present invention is applied includes an access switching subsystem (ASS) (1 to 3), an internal connection network subsystem (INS) (4), and It consists of three subsystems of the Central Control Subsystem (CCS) 5.

The access exchange subsystem (ASS) is a subscriber access switching subsystem (ASS_S (Subscriber)), a digital subscriber access switching subsystem (ASS_I (ISDN)), a trunk line connection switching subsystem (ASS_T (Trunk)), and mobile communication according to functions. It is classified into a subscriber access switching subsystem (ASS_M (Mobile)) and a common line access switching subsystem (ASS_7 (No. 7 Signaling System), and is a subscriber access switching subsystem (ASS_S) and a digital subscriber access switching subsystem (ASS_I). In (1), an access switching processor (ASP) 13 connects a call processing function to a subscriber housed in an exchange, and an inter-station relay line call processing function accommodated in a trunk line connection switching subsystem (ASS_T) 2; In the common line connection switching subsystem (ASS_7) 3, a switching processor (ASP) 16 uses a message transmission part (MTP) and a signaling connection control part (SCCP) of No. 7 signaling. Of) Connecting exchange performance processor (ASP) (19) and the message signal processor: the (SMHP Signalling Message Handling Processor) (20) is performed.

In the internal network subsystem (INS) 4, a number translation processor (NTP: Number Translation Processor), a number translation function, a route control function, and a space inconsistent switch control function, which are commonly required in each access exchange subsystem (ASS), are used. (22) and the Interconnection Network Processor (INP) 21 perform each.

In addition, the central control subsystem (CCS) 5 is a sub-system that performs overall operation and maintenance functions of the system, as well as system-wide maintenance, test and measurement, and statistical functions, as well as a magnetic tape (M / T) and disk control management, various input and output statement control functions with the operator, and data channel connection functions with other systems.

The Operation and Maintenance Processor (OMP) 23 of the Central Control Subsystem (CCS) 5 manages network management, maintenance, test and measurement, statistics, and billing.

Each subsystem is connected to an internal network subsystem (INS) 4 via a Local Data Link (LDL) to form an interprocessor internal network.

In addition, the terminal configuration at the subscriber side for the digital subscriber fixed announcement designated path configuration service is connected to the BAMI and the BSI subscriber interface 10 through a network termination device 1 (NT1: Network Termination 1) through a maximum of eight terminals (TE) 30 or more terminals may be connected to the PSI subscriber through the connection of NT2 which performs the function of a private exchange.

The local call designation path configuration function for digital subscribers at the electronic switching center is implemented in the software block call trace and path setup (ASPS) of the access exchange processor (ASP) belonging to the access exchange subsystem (ASS) in which the digital subscriber is mounted. For the purpose of constructing the designated call path between the calling party and the called party, the originating subscriber control CTPS process and the called party controlling CTPS process are respectively generated to perform outgoing and incoming call control.

The CTPS block understands call control of subscribers and works with Digital Subscriber Interface (DSI) and Analog Subscriber Interface (ASI) software blocks.

In addition, the CTPS block, in conjunction with the software block call trace and path setup management (CTPM) mounted in the operation maintenance processor (OMP) 23, receives a digital subscriber home call designation path configuration request from the operator and notifies the processing result. do. Inter-block interworking in an electronic switchgear is made through inter-processor communication (IPC).

2A to 2C show a flowchart of a method for controlling an outgoing digital subscriber call for configuring a local call designation path according to the present invention.

When a local call designation path is configured through the operator's Man-Machine Command (OMC), the CTPM block of the operation maintenance processor (OMP) is connected to an access exchange processor (ASP) equipped with the requested originating subscriber. Sends local call designation path configuration request signal to CTPS main process.

The CTPS main process of the access switching processor (ASP) to which the originating subscriber belongs from the CTPM receives the local call designated path configuration request signal, and then the digital subscriber local call designated path configuration procedure is initiated. A number, an access exchange processor (ASP) number to which the incoming digital subscriber belongs, and an incoming digital subscriber line number are included (101).

The originating CTPS main process generates an outgoing control CTPS process for the CTPM's local call designation path configuration request, which originates from the subscriber database of the electronic switchboard (102) and verifies the subscriber type. If the subscriber is an analog subscriber (103), the procedure of configuring an analog subscriber local call designation path is performed (104). If the subscriber is a digital subscriber (103), the available state of the circuit is checked (105).

If the status of the digital subscriber line is available, selecting an available B channel (107), if channel selection is successful (108), constructing a message containing call reference number, channel information, transmission characteristics, and progress indication ( In operation 109, a time slot corresponding to the selected B channel is searched (109) to determine whether the time slot is successfully searched (111).

If the retrieval of the timeslot is successful (111), the originating control CTPS process sends an incoming call request signal to the CTPS main process of an access exchange processor (ASP) where the called party is accommodated for the occupying request of the called party (112). Then, the incoming occupancy timer is driven (113) to wait for an incoming occupancy notification signal from the incoming control CTPS process generated by the called party's CTPS main process (114).

However, if the occupied digital subscriber line is unavailable or there is no available channel, or if the time slot is not successfully retrieved, it transmits a Local Call Designation Path Unconfigured signal to the CTMP block (106) and nulls. Maintain state.

When the originating control CTPS process receives the incoming call notification signal including the switch information of the called party from the incoming control CTPS process in the incoming call occupancy waiting state (115), after canceling the incoming call occupancy timer (116), the call of the outgoing digital subscriber Configure the setup message by specifying the bearer capability information as 64Kbps voice and setting the progress indicator information as in-band information for setup. (117).

The call setup message is transmitted to the calling digital subscriber (118), the network layer 3 timer is driven to monitor the message received from the calling digital subscriber (119), and the process proceeds to the call setup step (120).

When a digital subscriber station capable of voice service receives a SETUP message from the network requesting an incoming call setup, it notifies the subscriber of the arrival of a compatible call and sends an ALERTING message to the network. Done.

When the originating control CTPS process receives a CONNECT message from the terminal by the hook-off of the subscriber (121), the originating control CTPS processor cancels the running network layer 3 timer (122), Send a CONNCT ACKNOWLEDGE message to the subscriber station (123), connect the time switch and the space switch (124, 125), notify the switch connection status to the incoming control CTPS process (126), and call Transition (127).

However, when the network layer 3 timer registered in the call setup phase is terminated (128), the originating control CTPS process sends a digital subscriber station call designation path not possible signal to the CTPM (129), and sends an origination release signal to the terminating control CTPS process. After transmitting (130), the call is initiated (131).

When receiving a call release-related message from the subscriber station in the call setup step (132), the originating control CTPS process cancels the network layer 3 timer in operation (133), and transmits a digital subscriber station call designation path impossible signal to the CTPM. (134), and after transmitting the release signal to the incoming control CTPS process (135), and initiates the release (136).

When the originating control CTPS process receives a call release-related message from an originating digital subscriber in a busy state (137), it disconnects the connected time switch and the space switch (138), and sends a local call designated path end signal to the CTPM. In addition, by transmitting a call release signal to the incoming call control CTPS process (140) to release the call of the incoming digital subscriber, return the resource information such as the used channel, and then proceed with the call release procedure of the calling digital subscriber. (141).

When the outgoing control CTPS process receives the call release notification signal from the incoming control CTPS process by the recovery of the called party in the busy state (142), the connected call path is disconnected (143), and the home call is designated by CTPM. After transmitting the path configuration termination signal (144), it returns the resource information, such as the channel used, and proceeds with the call release procedure of the calling digital subscriber (146).

The present invention made as described above is an incoming call to the voice call of the terminal through the procedure of configuring the local call designation path between the BSI, BAMI, and the digital subscriber of the PSI mounted on the electronic switch in the electronic switch used as a node of the integrated information communication network The signal processing function, normal function operation such as time switch and space switch, which are resources in the system of the electronic switching system, and the call test between the configured digital subscribers and the incoming digital subscribers, can be performed by the MMC command of the digital subscriber's own call designation path. You can see the effect.

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

Claims (5)

Access Switching Processor (ASP) and Call Trace and Path Setup Management (CTPM) software blocks equipped with a Call Trace and Path Setup (CTPS) software block for configuring a designated call path between called and receiving subscribers. In the outgoing digital subscriber call control method for local call designation path applied to an electronic switch equipped with an operation and maintenance processor (OMP), A first step of generating an outgoing control CPTS process for outgoing call path configuration when the outgoing CTPS main process receives a local call designated path configuration request signal from the CTPM; After performing the first step, the outgoing control CTPS process selects a channel in which the state of the digital subscriber line is available for the digital subscriber who has requested occupancy, searches for a time slot corresponding to the selected channel, selects a time slot, and calls a reference number. A second step of constructing a message including channel information, transmission characteristics, and progress indication to transmit an incoming occupancy request signal to an incoming control CTPS process; When the originating control CTPS process receives the incoming occupancy notification signal from the incoming control CTPS process, configures a call setup message by designating transmission characteristic information and progress indicator information for the call setup of the digital subscriber, and then transmits to the outgoing digital subscriber. step; When the originating control CTPS process receives the CONNECT message from the terminal by the hook-off of the subscriber, it cancels the watchdog timer, transmits the connection response acknowledgment message to the subscriber terminal, and then switches the time switch and the space switch. A fourth step of connecting a call, a switch connection state to an incoming control CTPS process, transitioning to a busy state, and performing a call release procedure when a call release message is received or a watchdog timer expires in a call setup step; And When the outgoing control CTPS process receives a call release-related message from an outgoing digital subscriber in a busy state, or receives a call release notification signal from the incoming call control CTPS process, the connected call path is disconnected and a call release procedure is performed. Outgoing digital subscriber call control method for local call designation path comprising 5 steps. The method of claim 1, The second step, The originating control CTPS process may include a first step of accessing a subscriber database to confirm a subscriber type; Performing a procedure of configuring an analog subscriber's home call designation path when the required subscriber type is an analog subscriber and checking a usable state of the circuit when the subscriber type is a digital subscriber; If the status of digital subscriber line is available, select the available B channel and if the channel selection is successful, compose a message including call reference number, channel information, transmission characteristics, progress indication, and time corresponding to the selected B channel. Searching for a slot, selecting a time slot, including the digital subscriber's switch information in the incoming occupancy request signal and transmitting it to the incoming control CTPS process, and driving the incoming occupancy timer to receive the incoming subscriber call setup result from the incoming CTPS process. Third process waiting for; And A fourth to transmit a Local Call Designation Path Unconfigured signal to the CTPM and remain null if the digital subscriber line required is not available, no channel is available, or the timeslot search is not successful. An outgoing digital subscriber call control method for configuring a local call designation path comprising a process. The method of claim 1, The third step, When the originating control CTPS process receives the incoming occupancy notification signal from the incoming control CTPS process, it cancels the incoming occupancy timer, assigns the transmission characteristic information to 64 Kbps voice to set up the call of the outgoing digital subscriber, and sets the progress indicator information in band. After configuring the SETUP message by specifying that the information is available, the call setup message is sent to the calling digital subscriber and the network layer 3 timer is started to monitor the message received from the calling digital subscriber. Outgoing digital subscriber call control method for local call designation path, characterized in that the step of transition to the step. The method of claim 1, The fourth step, When the originating control CTPS process receives the CONNECT message from the terminal by the hook-off of the called subscriber in the call setup phase, the network layer 3 timer in operation is canceled and the connection response acknowledgment message is sent to the subscriber terminal. Transmitting, connecting the time switch and the space switch, and then notifying the incoming control CTPS process of the switch connection state and transitioning to the busy state; When the originating control CTPS process terminates the network layer 3 timer registered in the call setup phase, the digital subscriber station call designation path is transmitted to the CTPM, and the originating control CTPS process is sent to the originating control CTPS process. A second process of doing; And When the originating control CTPS process receives a call release-related message from the subscriber station in the call setup phase, it cancels the network layer 3 timer in operation, transmits a digital subscriber station call designation impossible signal to the CTPM, and sends it to the incoming control CTPS process. And a third step of initiating call release after transmitting the release signal. The method of claim 1, The fifth step, When the originating control CTPS process receives a call release-related message from an originating digital subscriber in a busy state, the connected time switch and the space switch are disconnected, and the terminating call designation path configuration termination signal is transmitted to the CTPM, and the incoming control CTPS process The first process of transmitting a call release signal, returning resource information of a used channel or the like, and then proceeds with the call release procedure of the calling digital subscriber; And When the outgoing control CTPS process receives a call release notification signal from the incoming control CTPS process while in a busy state, the connected call path is disconnected, and the CTPM process transmits its own call designation path configuration termination signal to the CTPM. And a second process of returning the information and proceeding with the call release procedure of the originating digital subscriber.