KR100275511B1 - Internal terminating call control mathod for the atm subscriber - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a method of controlling a subscriber station local station call in an asynchronous transmission mode switching system.

2. The technical problem to be solved by the invention

An object of the present invention is to provide a subscriber station call control method for providing a call control service to a subscriber.

3. Summary of Solution to Invention

The present invention provides a first step of receiving an incoming call establishment request and confirming a connection type of a call; Performing a resource allocation and a switch path selection, and transmitting a switch link information notification and waiting for receiving additional information; A third step of transmitting a call setup message and waiting for a called party response after receiving the additional information notification; And a fourth step of receiving a connection message from the called party, connecting the subscriber interface module to transition to a busy state.

4. Important uses of the invention

The present invention is used to control the called party's call in the asynchronous transmission mode switching system.

Description

A method for controlling subscriber station self station call in asynchronous transfer mode switching system.

The present invention relates to a method of controlling a called party's own station call in an asynchronous transmission mode switching system and a computer-readable recording medium recording a program for realizing the same.

Until now, the protocol of the International Telecommunication Union (ITU-T) Q.2931 / Q.2971 has been used in the Asynchronous Transfer Mode (ATM) network that operates as the public network of the broadband ISDN (B-ISDN). Call control service function for subscribers has been added. However, the Asynchronous Forum (ATM Forum), a standardization organization based in North America, has decided the signaling standards such as UNI3.1 / UNI4.0 as subscriber control protocols. The mode forum follows the specifications of UNI3.1 / UNI4.0.

Asynchronous transmission mode forum UNI3.1 / UNI4.0 standard terminal equipment is used in Korea, and it is a terminal of the International Telecommunication Union (ITU-T) Q.2931 / Q.2971 standard in an asynchronous transmission mode switching system to be used as a public network. In addition to the devices, it has become necessary to accommodate various types of terminal devices conforming to the UNI3.1 / UNI4.0 specification.

However, in the stage of establishing an asynchronous transmission mode switching system in the country, and the asynchronous transmission mode switching system accepts UNI4.0 subscribers, a leaf initiated join (LIJ) is used as a conventional asynchronous transmission mode switching system. Services such as point-to-multipoint connection service, asynchronous transport mode Anycast, traffic parameter negotiation, quality of service (QoS) parameter signaling, and generic identifier delivery function There was a problem that can not provide to the subscriber.

In order to solve the above problems, the present invention creates a call control process for each connection type of a call requested by a subscriber, performs call control, and switches path information to an originating point-to-point connection control process that requests an incoming call. After transmitting the "switch link information notification" signal including the information, such as traffic parameter negotiation, individual Quality of Service (QoS) parameter signal, and generic identifier (Generic Identifier) delivery information such as user network interface (UNI) It is an object of the present invention to provide a computer-readable recording medium recording a method for controlling a called party's own station in asynchronous transmission mode switching system receiving additional information and a program for realizing the same.

1 is a control structure diagram of an asynchronous transmission mode switching system to which the present invention is applied.

2A to 2D are flowcharts illustrating an embodiment of a method for controlling a subscriber station local call in an asynchronous transmission mode switching system according to the present invention.

The present invention for achieving the above object, in the call control method applied to the asynchronous transmission mode switching system, the main part of the ATM Forum User call Control Software Block (hereinafter referred to as AFUCF) (main) a first step of receiving an incoming call establishment request from an originating point-to-point connection control process and confirming the connection type of the requested call to start an incoming point-to-point connection control process; A second step in which the incoming point-to-point connection control process allocates resources and selects a switch path, transmits a switch link information notification message to the originating point-to-point connection control process, and then transitions to a state of receiving additional information; A third step of, after the incoming point-to-point connection control process receives the additional information notification signal from the originating point-to-point connection control process, transmitting a call setup message to the called party and transitioning to the called party response waiting state; And a fourth step in which the called point-to-point connection control process receives a connection message from a called party, connects a subscriber interface module (SIM) and transitions to a busy state in the called party response waiting state. .

In addition, the present invention, the main process of the AFUCF ATM Forum User call Control Software Block (AFUCF) in the asynchronous transmission mode switching system having a processor is called from the originating point-to-point connection control process A first function of receiving a call establishment request and confirming a connection type of the requested call to start an incoming point-to-point connection control process; A second function, wherein the incoming point-to-point connection control process allocates resources and selects a switch path, and transmits a switch link information notification message to the originating point-to-point connection control process, and then transitions to a standby state for receiving additional information; A third function of transmitting a call setup message to a called party and transitioning to a called party answer waiting state after the incoming point-to-point connection control process receives the additional information notification signal from the originating point-to-point connection control process; And a program for the called point-to-point connection control process to receive a connection message from the called party in the called party answer waiting state to connect a subscriber interface module (SIM) and to transition to a busy state. It includes a computer readable recording medium.

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

1 is a control structure diagram of an asynchronous transmission mode switching system to which the present invention is applied. As shown in the drawing, the asynchronous transmission mode switching system is largely referred to as an ATM local switching subsystem (hereinafter, referred to as ALS). ) 102 and 103 and asynchronous transmission mode central switching subsystem (ATM Central Switching Subsystem) (hereinafter referred to as ACS) 101.

The ACS 101 is composed of an Inter-connection Switch Network Module (hereinafter referred to as ISNM) 104 and an Operation and Maintenance Processor (OMP) 105, and the ALS / T 102 is Access Switch Network Module (hereinafter referred to as ASNM) 106, Relay Line Interface Module (TIM) 107, and Call and Connection Control Processor (hereinafter referred to as CCCP) 108, and the ALS / S 103 includes an ASNM 109, a Subscriber Interface Module (hereinafter referred to as SIM) 110, and a CCCP 111.

ALS is classified according to its function as ALS / Subscriber (S), ALS / Trunk (T: Trunk), and ALS / ST which is a mixture of ALS / S and ALS / T. The CCCP 108 performs the inter-office relay line call processing function, and the CCCP 111 performs the call processing function for the subscriber accommodated in the ALS / S 103. The ASNMs 106 and 109 in the ALS perform local switching and aggregation functions as switches for transmitting cells in basic units.

ACS performs various I / O control functions with operators as well as call translation function, number translation function, route control, system level maintenance, test, billing, and statistics that are common to each ALS.

The ATM Forum User call Control Software Block (hereinafter referred to as AFUCF), which is implemented in the CCCP of the ALS 102 and 103, is a member of the ATM Forum UNI4.0 protocol subscriber. Incoming call processing and status management function of the UE, and in connection with CCCP's User Signaling Interface Software Block (hereinafter referred to as USIF) to send UNI4.0 protocol signaling messages from UNI4.0 subscribers User of the CCCP for allocating / receiving User-Network Interface (UNI) resources, such as / Virtual Path Indicator (VPI) and Virtual Channel Indicator (VCI) Network Interface Link Resource Handling Software Block (hereinafter referred to as ULRH), SLRH (SLRH) of CCCP for allocating / returning switch link resources. esource Handling Software Block), interworking with Number Translation Local Software Block (hereinafter referred to as NTLF) for station number translation, and Number Translation Control Software Block for called number translation ) (Hereinafter referred to as NTCF). In addition, AFUCF controls the subscriber interface module of the subscriber interface module (SIM) subscriber board to allocate and release the routing tag (TAG) of the asynchronous transmission mode cell used for transmitting and receiving call data of the UNI4.0 subscriber. Module Control (hereinafter referred to as SIMC).

Specifically, the AFUCF software block is responsible for the UNI4.0 subscriber call control function for the UNI4.0 subscriber call control procedure in the Asynchronous Transfer Mode Switching System, which sends the subscriber's signaling messages to the IPC inside the Asynchronous Transfer Mode system. It performs the function of transmitting / receiving subscriber and call control message in conjunction with USIF which converts or converts system internal IPC into subscriber signal message. And, in order to control the UNI4.0 subscriber call in the asynchronous transmission mode switching system, the AFUCF main process, the AFUCF originating point-to-point connection control process, the AFUCF originating point-to-multipoint connection control process, the AFUCF destination point-to-point connection control process, and the AFUCF destination point There should be a multi-point connection control process. Its functions are as follows:

The AFUCF originating point-to-point connection control process sends an asynchronous transmission mode forum subscriber call setup request signal to the AFUCF of the ALS on which the called party is equipped if the protocol type of the called party is UNI4.0, and the AFUCF main process of the incoming ALS is asynchronous. UNI4.0 subscriber incoming call control function is started by receiving signal of transport mode forum subscriber call setup request.

One AFUCF main process is created per CCCP of the ALS, which is the AFUCF originating / receiving point-to-point function for handling incoming call establishment requests from the USIF and incoming call establishment requests from UNI4.0 subscribers from the AFUCF originating point-to-point connection control process. Performs the function of creating a point connection control process.

The AFUCF originating point-to-point connection control process is a process for performing outgoing call control of UNI4.0 subscribers. A process is generated for one call and then destroyed after completing outgoing call control.

The AFUCF incoming point-to-point connection control process is a process that performs incoming call control of UNI4.0 subscribers. A process is created for one call to complete the incoming call control function and then disappears. The incoming point-to-point connection control process consists of a virtual path indicator (VPI) / virtual channel indicator (VCI) assignment and user network interface (UNI) band assignment to the ULRHF library, a switchlink assignment to the SLRHF library, and an ALS with an outgoing UNI4.0 subscriber. Initiate call setup in conjunction with AFUCF originating point-to-point connection control process in CCCP. In addition, the AFUCF called point-to-point connection control process monitors the response of the called subscriber in conjunction with the AFUCF originating point-to-point connection control process generated by the AFUCF main process of the calling ALS, and establishes a connection with SIMC when the called subscriber response occurs. And notifies the called party's connection to the AFUCF originating point-to-point connection control process and consists of a busy state where data cell transmission and reception are performed.

2A to 2D are flowcharts illustrating an embodiment of a method for controlling a subscriber station local call in an asynchronous transfer mode switching system according to the present invention.

First of all, the ALS / AFUCF originating point-to-point connection control process or Q.2931 originating point-to-point connection control process, which is implemented in the asynchronous transfer mode switching system, sends the message "Asynchronous Transfer Mode Forum Subscriber Incoming Call Setup Request". An incoming call setup procedure is initiated by the reception of the AFUCF main process, which is implemented in the CCCP of S (201).

The AFUCF main process checks the type of call connection requested in "201" (202, 203).

As a result of the check, when the form of call connection is a point-to-multipoint connection configuration, the AFUCF incoming point-to-multipoint connection control process is started (204), and the AFUCF incoming point-to-multipoint connection control procedure is performed (205).

As a result of the check, if the form of call connection is a point-to-point connection configuration, the AFUCF incoming point-to-point connection control process is started (206), and the AFUCF incoming point-to-point connection control procedure is performed (207).

The AFUCF incoming point-to-point connection control process examines the contents of the call establishment message (208), then accesses the database in which the subscriber interface module (SIM) and the link availability are available, and additional service registration information of the subscriber line is stored; A virtual path indicator (VPI) and a virtual channel indicator (VCI) allocation, a user network interface (UNI) band allocation, and a switch path selection are performed (209).

As a result of the above, if the virtual path indicator (VPI) and the virtual channel indicator (VCI) allocation, the user network interface (UNI) allocation, and the switch path selection fail, the AFUCF destination point-to-point connection control process performs a call release procedure. (211) Transition to initial state.

As a result of the above execution, if the virtual path indicator (VPI) and the virtual channel indicator (VCI) allocation, the user network interface (UNI) allocation, and the switch path selection are successful, the AFUCF destination point-to-point connection control process initiates an outgoing call requesting the establishment of an incoming call. A signal of " switch link information notification " including switch path information is sent to the point-to-point connection control process (212). The AFUCF incoming point-to-point connection control process drives the additional information reception waiting timer for waiting for reception of the additional information required for the incoming call setup (213), and then transitions to the state of waiting for the additional information reception (214). Here, the additional information refers to information such as traffic parameter negotiation, individual Quality of Service (QoS) parameter signals, and generic identifier delivery.

In the waiting state for receiving additional information (214), when the AFUCF incoming point-to-point connection control process receives the additional information waiting timer termination signal (215), it performs a call release procedure (216) and then transitions to the initial state.

In the waiting for additional information reception (214), the AFUCF incoming point-to-point connection control process receives a signal of "notification of additional information" from the originating point-to-point connection control process (217), cancels the additional information waiting timer (218), After transmitting a "SETUP" message to the called party (219), the incoming caller response waiting timer is driven (220), and transitions to the called party response waiting state (221).

In the waiting for the called party response (221), the AFUCF called point-to-point connection control process receives the call release message (222), cancels the registered caller response waiting timer (223), and then performs the call release procedure ( 224) Transition to the initial state.

In the waiting for the called party response (221), when the AFUCF called point-to-point connection control process receives the message of "ALERTING" from the called party (225), it cancels the registered called party answer waiting timer (226), After transmitting the " incoming subscriber call notification " signal to the AFUCF originating point-to-point connection control process (227), the incoming subscriber response waiting timer is again driven (228) and the called party response waiting state is maintained (221).

In the called party response waiting state (221), when the AFUCF called point-to-point connection control process receives a "CONNECT" message from the called party (229), after canceling the registered called party answer waiting timer (230), The subscriber interface module (SIM) of the called subscriber is connected (231). Then, after transmitting the "incoming connection notification" signal to the AFUCF originating point-to-point connection control process (232), and transmits the "CONNECT ACKNOWLEDGE" message to the destination UNI4.0 subscriber (233), the transition to the busy state (234).

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 by the drawings.

As described above, the present invention provides a switched virtual connection (SVC) via an asynchronous transmission mode switching system between asynchronous transmission mode forum UNI4.0 subscribers mounted in an asynchronous transmission mode switching system used as a node of an integrated information communication network. Connection) Enables local call setting function and leaves leaf-initiated join (LIJ) point-to-multipoint connection service, asynchronous transmission mode anycast, which cannot be provided in conventional asynchronous transmission mode switching network. Services such as traffic parameter negotiation, individual quality of service (QoS) parameter signaling, and generic identifier delivery can be provided, and call control processes are generated by creating a call control process for each connection type of call. Exchange memory compared to the way a process performs point-to-point and point-to-multipoint connections There are excellent effects that portion can be reduced and the processing speed for improved call.

Then, after transmitting the "switch link information notification" signal including the switch path information to the originating point-to-point connection control process requesting the incoming call setup, traffic parameter negotiation, individual Quality of Service (QoS) parameter signal, And by receiving information such as generic identifier transmission as additional information of a user network interface (UNI), it is possible to reduce the waste of communication resources in the asynchronous transmission mode system, and the abnormality of the originating point-to-point connection control process or the inter-process communication In the case of disconnection, there is an excellent effect that can immediately deal with the incoming call release.

Claims (10)

A call control method applied to an asynchronous transmission mode switching system, Asynchronous Transfer Mode The main process of the ATM Forum User call Control Software Block (hereinafter referred to as AFUCF) receives the incoming call establishment request from the originating point-to-point connection control process, and the requested call connection type. Confirming the first step of starting the incoming point-to-point connection control process; A second step in which the incoming point-to-point connection control process allocates resources and selects a switch path, transmits a switch link information notification message to the originating point-to-point connection control process, and then transitions to a state of receiving additional information; A third step of, after the incoming point-to-point connection control process receives the additional information notification signal from the originating point-to-point connection control process, sending a call setup message to the called party and transitioning to the called party response waiting state; and A fourth step in which the called point-to-point connection control process receives a connection message from a called party, connects a subscriber interface module (SIM) and transitions to a busy state in the called party response waiting state; Subscriber called party call control method comprising a. The method of claim 1, The subscriber, A subscriber station local call control method characterized by being a subscriber to a User Network Interface 4.0 (UNI 4.0). The method according to claim 1 or 2, The first step is, A fifth step of the main process receiving an incoming call establishment request message from an originating point-to-point connection control process and confirming a connection type of the requested call; A sixth step of initiating an incoming point-to-point connection control process if the call connection type is point-to-point connection as a result of the checking in the fifth step; And A seventh step of initiating an incoming point-to-multipoint connection control process if the call connection type is a point-to-multipoint connection Subscriber called party call control method comprising a. The method according to claim 1 or 2, The second step, After the incoming point-to-point connection control process examines the contents of the call establishment message, confirms the availability of the subscriber interface module (SIM) and the link, accesses the database storing the additional service registration information of the subscriber line, and the virtual path indicator ( A fifth step of allocating a virtual path indicator (VPI) and a virtual channel indicator (VCI), a user network interface (UNI) band allocation, and a switch path selection; As a result of performing the fifth step, if the virtual path indicator (VPI) and the virtual channel indicator (VCI) allocation, user network interface (UNI) band allocation and switch path selection fail, the destination point to point A sixth step in which the point connection control process performs a call release procedure and transitions to an initial state; And As a result of performing the fifth step, if the virtual path indicator (VPI) and the virtual channel indicator (VCI) allocation, user network interface (UNI) band allocation and switch path selection are successful, The point connection control process transmits a switch link information notification to the originating point-to-point connection control process requesting the incoming call setup, and then transitions to a standby state for receiving additional information. Subscriber called party call control method comprising a. The method according to claim 1 or 2, The third step, A fifth step of performing a call release procedure and transitioning to an initial state when the incoming point-to-point connection control process receives the additional information wait timer termination signal in the second information reception waiting state; And In the standby state of receiving additional information of the second step, when the called point-to-point connection control process receives the additional information notification signal from the originating point-to-point connection control process, it transmits a call setup message to the called party and waits for a called party response. 6th step to transition to Subscriber called party call control method comprising a. The method of claim 5, The additional information, A method for controlling a called party's call, characterized in that it is information about traffic parameter negotiation, individual quality of service (QoS) parameter signals, and generic identifier (Generic Identifier) delivery. The method of claim 5, The sixth step, A seventh step of canceling the additional information waiting timer when the incoming point-to-point connection control process receives the additional information notification signal from the originating point-to-point connection control process in the second information receiving standby state; An eighth step, wherein the incoming point-to-point connection control process sends a call establishment message to a called party; And The ninth step, wherein the incoming point-to-point connection control process drives the incoming subscriber response waiting timer and transitions to the incoming subscriber response waiting state; Subscriber called party call control method comprising a. The method according to claim 1 or 2, The fourth step, A fifth step of canceling a called party response waiting timer, performing a call release procedure and transitioning to an initial state when the called point-to-point connection control process receives the call release message in the called party response waiting state of the third step; When the called point-to-point connection control process receives the ALTERTING message from the called party in the called party response waiting state of the third step, the called party response waiting timer is canceled, and the call to the originating point-to-point connection control process is performed. A sixth step of maintaining the called party response waiting state by driving the called party response waiting timer again after transmitting the called party call notification signal; And A seventh step of connecting the subscriber interface module (SIM) to a busy state when the incoming point-to-point connection control process receives the connection message from the called party in the called party response waiting state of the third step; Subscriber called party call control method comprising a. The method of claim 8, The seventh step, An eighth step in which the called point-to-point connection control process receives a CONNECT message from a called subscriber and cancels the called party response waiting timer in the third-party caller waiting state; A ninth step, wherein the incoming point-to-point connection control process connects a subscriber interface module (SIM) and transmits an incoming caller connection notification signal to the originating point-to-point connection control process; And A tenth step in which the called point-to-point connection control process transitions to a busy state after transmitting a CONNECT ACKNOWLEDGE message to the called subscriber; Subscriber called party call control method comprising a. In an asynchronous transfer mode switching system having a processor, The main process of the AFUCF ATM Forum User call Control Software Block (AFUCF) receives the incoming call establishment request from the originating point-to-point connection control process and checks the connection type of the requested call. A first function of starting a point connection control process; A second function, wherein the incoming point-to-point connection control process allocates resources and selects a switch path, and transmits a switch link information notification message to the originating point-to-point connection control process, and then transitions to a standby state for receiving additional information; A third function of transmitting a call setup message to a called party and transitioning to a called party response state after the incoming point-to-point connection control process receives the additional information notification signal from the originating point-to-point connection control process; and A fourth function of the called point-to-point connection control process receiving a connection message from a called party, connecting a subscriber interface module (SIM) and transitioning to a busy state in the called party response waiting state; A computer-readable recording medium having recorded thereon a program for realizing this.