KR980013503A - A method of controlling an incoming digital subscriber call for a local call routing in an electronic exchanger - Google Patents

Abstract

1. Technical field to which the invention described in the claims belongs

A method of controlling an incoming digital subscriber call in which an electronic call center establishes a local call routing path

2. Technical Challenges to be Solved by the Invention

The function of the time switch and the space switch which are the system resources for the digital subscriber in the whole electronic exchange used as the node of the integrated information communication network, the DSS1 signal procedure of the digital subscriber terminal, and the request of the operator To provide a method of controlling an incoming digital subscriber call for constituting a local call routing path.

3. The point of the solution of the invention

When the destination control CTPS process selects a usable channel and a time slot for the digital subscriber requesting call admission and transmits the result to the origination control CTPS process and receives a response signal, After configuring the call setup message by specifying the information of the progress indicator, it is transmitted to the incoming digital subscriber and the call is connected by receiving the response.

4. Important Uses of the Invention

Used to set the local call routing path of the digital subscriber in all electronic exchanges.

Description

A method of controlling an incoming digital subscriber call for a local call routing in an electronic exchanger

The present invention relates to a system and method for controlling a space switch and a time switch, which are system resources through an operator's MMC (Man-Machine Command) command, in an entire electronic exchanger used as a node of an ISDN (Integrated Service Digital Network) The present invention relates to a normal digital subscriber call control method for a normal function operation of a voice service terminal, a function of a normal signal processing procedure of a voice service terminal, and a connection to an audible call between a digital subscriber and a called digital subscriber.

At present, there are many kinds of networks such as telephone network, teletex network, data communication network, and packet network, and each network is developed independently to support only one type of service, thus lacking manganese compatibility. Also, since each network is realized with individual protocol, speed, standard, and circuit standard, it has difficulties in interworking due to legal problems and limitations of analytical technology.

In order to solve the above problems, it has been required to construct a communication base which is more economical, superior in quality, and has manganese compatibility, and has a wider communication base. For this purpose, a user can receive a wide range of services using a limited standardized multi- The concept of integrated information network has appeared.

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

Therefore, the present invention can be applied to a digital subscriber line of Basic Subscriber Interface (BSI), Basic Access Multiplex Interface (BAMI), and PSI (Pramary Subscriber Interface), which are installed in an electronic exchanger in an electronic exchanger used as a node of an integrated information communication network The function of time switch and space switch, which is a system resource, the procedure of DSS1 signal of digital subscriber terminal, and the connection confirmation by audible call between a calling subscriber and a called subscriber, And to provide a method of controlling an incoming digital subscriber call for constituting a local call routing path,

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic control structure of a pre-dispersion electronic control unit to which the present invention is applied;

FIG. 2A to FIG. 2C are processing flowcharts of a method of controlling an incoming digital subscriber call for a local call setup path configuration according to the present invention.

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

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 shows a schematic control structure of a pre-dispersion electronic control unit to which the present invention is applied.

As shown in the figure, the distributed control system electronic switching system to which the present invention is applied includes an access switching subsystem (ASS) 1 to 3, an interconnection network subsystem (INS) 4, And a central control subsystem (CCS) 5, as shown in FIG.

The Access Switching Subsystem (ASS) may, depending on its function, be connected to a Subscriber Access Switching Subsystem (ASS_S), a Digital Subscriber Access Switching Subsystem (ASS_I (ISDN)), a Trunk Line Access Switching Subsystem (ASS_T (Trunk) (ASS_M (Mobile)), and a common line access switching subsystem (ASS_7 (No. 7 Signaling System)). The subscriber access switching subsystem ASS_S and the digital subscriber access switching subsystem ASS_I , An access switching processor (ASP) 13 performs a call processing function for a subscriber accommodated in an exchange and an interconnection line call handling function accommodated in the trunk line connection switching subsystem (ASS_T) (2) (ASP) 16 is connected to a message transfer part (MTP) of the No. 7 signaling system and a signaling connection control part (SCCP) of the signaling connection control part A connection exchange 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 function, a route control function, and a call control function, which are common call processing functions required in each connection switching subsystem (ASS) And an Interconnection Network Processor (INP), respectively.

The central control subsystem (CCS) 5 is a sub-system that performs the overall operation and maintenance functions of the system. The central control subsystem (CCS) 5 is a subsystem for performing system maintenance, test and measurement, statistical functions as well as a magneto- T) and a disk (Disk), various input and output control functions with the operator, and a data channel connection function with other systems.

The Operation and Maintenance Processor (OMP) 25 of the Central Control System (CCS) 5 manages network management, maintenance, testing 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 system internal network.

The terminal configuration on the subscriber side for the digital subscriber fixed announcement designated path configuration service includes a maximum of eight terminals TE through the connection of the network termination 1 to the BAMI and the BSI subscriber interface 10 And for the PSI subscriber, more than 30 terminals can be connected through the connection of the NT2 performing the function of the private branch exchange.

The local call routing configuration function for the digital subscriber at the electronic exchanger is implemented in the software block CTPS (Call Trace and Path Setup) of the access exchange processor (ASP) belonging to the access switching subsystem (ASS) in which the digital subscriber is implemented The originating subscriber control CTPS process and the called subscriber control CTPS process are respectively performed to configure the originating call routing path between the originating subscriber and the originating subscriber, thereby performing outgoing and incoming call control.

The CTPS block interfaces with the subscriber's call control, understanding digital subscriber interface (DSI) and analog subscriber interface (ASI) software blocks.

In addition, the CTPS block receives a digital subscriber station call path configuration request from the operator in cooperation with a software block CTPM (Call Trace and Path Setup Management) implemented in the operation maintenance processor (OMP) 25, do. Interworking between blocks in an electronic exchange is achieved through inter-processor communication (IPC).

2A to 2C are flowcharts of a method of controlling an incoming digital subscriber call for a local call setup path configuration according to the present invention.

When a call-originating path configuration for a digital or analog subscriber installed in an electronic exchanger is requested through an operator's Man-Machine Command (MMC), the CTPM block of the operation maintenance processor (OMP) To the CTPS main process of the connected access switching processor (ASP).

The CTPM main process of the access exchange processor (ASP) to which the originating subscriber belongs receives the "local call routing path configuration request" signal from the CTPM, and the local call routing path establishment procedure is started. A subscriber line number, a connection exchange processor (ASP) number to which the incoming digital subscriber belongs, an incoming digital subscriber line number, and the like.

The originating CTPS main process creates an origination control CTPS process for the home call routing configuration request of the CTPM, and the originating control CTPS process creates a call control CTPS process for the originating subscriber's occupation request, CTPS process, and waits to receive a "Call Acquisition Notification" signal from the call control CTPS principal \ process generated by the called CTPS process.

When the CTPS main process of the connection exchange processor (ASP) receiving the incoming digital subscriber receives (101) a "call hold request" signal from the call control CTPS process, it creates an incoming call control CTPS process for incoming call line configuration.

The incoming call control CTPS process identifies the subscriber type by accessing the subscriber database of the electronic switching center (102), and if the subscriber who is requested to be occupied by the call is an analyst subscriber (103), it performs an analog subscriber station call routing (104), and if it is a digital subscriber (103), the available state of the line is confirmed (105).

If the status of the digital subscriber line is available, the available B channel is selected 107. If the channel selection is successful 108, the time slot corresponding to the selected B channel is searched 109 and the time slot is selected.

Then, if a message including the call reference number, the channel information, the transmission characteristics, and the progress indication is formed (110) and the call admission is successfully performed (111), the incoming call control CTPS process transmits a "call arrival notification" signal to the incoming digital subscriber (112), and drives an outgoing call setup timer (113) to wait for an originating subscriber call setup by the originating CTPS process (114).

However, if the called digital subscriber line that is requested to be occupied is unavailable or does not have a usable channel, the call control CTPS process sends a "call failure notification" signal (106) and remains in a null state.

When the originating subscriber call setup is completed by the originating control CTPS process and the connection of the space-switch connection and the originating time switch is performed, the terminating control CTPS process receives a "switch" from the originating control CTPS process, Connection notification "signal (115).

Upon receipt of the "switch connection notification" signal, the incoming call control CTPS process cancels 116 the outgoing call setup timer and then sets the Bearer Capability information to "64 Kbps voice" , The information of the progress indicator is designated as "inband information available", and a SETUP message is configured (117).

The call setup message is then transmitted 118 to the incoming digital subscriber, the network layer 3 timer is driven 119 to monitor messages received from the incoming digital subscriber, and transition 120 is made to the call setup phase.

When a digital subscriber terminal capable of voice service receives a SETUP message from a network requesting to establish a voice call reception call, it informs the subscriber of the arrival of an incoming call of compatible compatibility and returns an ALERTING message to the network .

When the incoming call control CTPS processor receives an ALERTING message from the called subscriber 121, it cancels the active network layer 3 timer 122 and connects the ring backtone 123.

After receiving the ALERTING message, the network layer 3 timer for monitoring a CONNECT of the called subscriber is driven 124 to wait for a response of the called subscriber 125.

If the called CTPS processor receives 126 a CONNECT message from the terminal due to a hook-off of the called subscriber 126, the called CTPS processor cancels the active network layer 3 timer 127 ), Transmits a CONNCT ACKNOWLEDGE message to the subscriber terminal (128), disconnects the ring-back tone being provided (129), performs a call connection procedure (130), and sends a call control CTPS processor " Response notification "signal (131), and transits to the busy state (132).

However, if the end 133 of the registered network layer 3 timer or a call release request of the called subscriber occurs (136) in the call setup step, the call control CTPS processor sends a call to the call control CTPS processor Failure notification "signal to cause the originating control CTPS processor to perform the originating subscriber call release procedure and to transmit the" local station call routing disable notification "signal to the CTPM.

Upon receipt of the call release related message from the incoming digital subscriber in the busy state of the call control CTPS processor (140), a call release procedure is performed (141) and a "call termination notification" signal is sent to the call control CTPS processor (142) The originating control CTPS processor sends a signal to the CTPM to terminate the "local call set-up path configuration", and disconnects the connected time switch and space switch. In addition, the call termination control CTPS processor carries out the call release process of the incoming digital subscriber after performing the cutoff to the connected call and returning the resource information such as the used channel.

If the called party CTPS processor receives a "Call Release Notification" signal from the originating control CTPS processor (144) by restoring the originating subscriber in a busy state, the connected call channel is truncated 145, And then proceeds to the call releasing procedure of the incoming digital subscriber (step 146).

According to the present invention as described above, the call origination path assignment procedure between BSI, BAMI, and PSI digital subscribers, which are implemented in all electronic exchanges in an electronic exchanger used as a node of an integrated information communication network, Signal processing function, normal function operation such as a time switch and a space switch, which are internal resources of the entire electronic exchange, and a call test between the configured foot and incoming digital subscribers, through the MMC command of the digital subscriber station call path configuration There is an effect that can be confirmed.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. 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 local call path between a called party and a called party A method of controlling an incoming digital subscriber call for a local call routing configuration applied to an electronic switching center having an operation and maintenance processor (OMP), the method comprising the steps of: A CTPS main process generates a call control CTPS process for a call setup with an incoming call when it receives a "call reception request" signal from the call control CTPS process; after the first step, For one digital subscriber, the status of the digital subscriber line corresponds to the channel that selected the available channel A time slot is searched to select a time slot, and a message including a call reference number, channel information, transmission characteristics, and progress indication is configured to transmit an " incoming call notification "signal, including switch information of the incoming digital subscriber, Step 2: After the CTPS process receives the "switch connection notification" signal from the originating control CTPS process, it sets up the call setup of the incoming digital subscriber Setting up a call setup message by designating transmission characteristic information and progress indicator information for the incoming digital subscriber and transitioning to a call setup step for monitoring a message received from the incoming digital subscriber, When the called control CTPS process receives a paging message from the called subscriber, Upon canceling the timer, connecting the ring-back tone, and receiving a CONNECT message from the terminal due to the hook-off of the called subscriber, the monitoring timer is canceled and a connection acknowledgment message is transmitted to the subscriber terminal And then transmits a "call acknowledgment" signal to the call control CTPS processor, transits to the busy state, and issues a call release message at the call setup stage A fourth step of performing a call release procedure when the watchdog timer expires; and a fourth step of receiving a call release related message from the called digital subscriber in a busy state, or receiving a "call release notification" signal from the call control CTPS process And a fifth step of disconnecting the connected call channel and performing a call release procedure. Incoming digital subscriber call control method. 2. The method according to claim 1, wherein the second step comprises: a call control CTPS process accessing a subscriber database to identify a subscriber type; and if the subscriber type is an analog subscriber, Step 2: Check the usable state of the line when the subscriber type is a digital subscriber: If the state of the digital subscriber line is available, select a usable B channel and if the channel selection is successfully performed, A time slot corresponding to the B channel is selected to select a time slot, and a message including a call reference number, channel information, transmission characteristics, and progress indication is configured to transmit the switch information of the incoming digital subscriber to the " To the originating CTPS process, and drives the originating call setup timer to initiate an originating CTPS process A third step of waiting for receiving a call origination subscriber call setup result; and a step of transmitting a "call failure notification" signal to the call control CTPS process when the occupied requested digital subscriber line is unavailable or there is no available channel, And a fourth step of maintaining a null state of the called digital subscriber call. The method of claim 1, wherein the third step is to cancel the outgoing call setup timer when the called control CTPS process receives a "switch connection notification" signal from the originating control CTPS process, Quot; is set to "64Kbps voice ", and the information of the progress indicator is designated as" in-band information is available "to form a SETUP message. Then, the SETUP message is transmitted to the incoming digital subscriber, And a step of transitioning to a call setup step by driving a network layer 3 timer to monitor a message received from a digital subscriber. The method as claimed in claim 1, wherein, in the fourth step, the call control CTPS processor receives an ALERTING message from the called subscriber, cancels the active network layer 3 timer, connects the ring backtone, A first step of waiting for a response of a called subscriber by driving a network layer 3 timer for monitoring a connection response (CONNECT); after performing the first procedure, a connection response from the terminal by a hook-off of the called subscriber Upon receiving the CONNECT message, the network layer 3 timer in operation is canceled, the connection acknowledgment message is transmitted to the subscriber terminal, the ring-back tone being provided is disconnected, A second step of transitioning to a busy state after transmitting an "incoming call acknowledgment" signal to the called party, and ending the network layer 3 timer registered in the call setup step or a call release request of the called subscriber And transmitting a "call failure notification" signal informing the originating control CTPS processor that the call destination designated path can not be configured, if it occurs, and a third step of transmitting the call failure notification signal to the originating control CTPS processor. The method according to claim 1, wherein the fifth step comprises the steps of: when receiving a call release related message from a called digital subscriber in a busy state, performing a call release procedure and sending a "call termination notice" signal to an originating control CTPS A first process of transmitting a resource to a connected digital subscriber, performing a call disconnection to a connected call and returning resource information such as a used channel, and performing a call release procedure of a called digital subscriber, When the call control CTPS process receives the "call release notification" signal from the call control CTPS process by the call control CTPS process, it disconnects the connected call channel, returns the resource information such as the used channel and then releases the call release procedure of the incoming digital subscriber The method of claim 1, further comprising the step of: How language. ※ Note: It is disclosed by the contents of the first application.