KR0123256B1 - Method for processing the intelligent application protocol domain in ain ssp - Google Patents

Abstract

A method for processing protocol of INAPD in AIN SSP is disclosed. The method for processing protocol of INAPD in AIN SSP comprises the steps of: detecting information such as operation class and timer and instructing the operation of ASE and encoding the operation; encoding a component by the instruction of component and generating a dialogue and then transmitting the component and the dialogue; checking the received dialogue and preparing for receiving the component, and then transmitting the received component to the ACP; decoding the operation in response to the instruction of decoding operation, and transmitting a message when a service primitive is received. Thereby, the method for processing the protocol of INAPD in AIN SSP may enable the instructing of operation through commonly applied service element without any correction of block even when a new service is added.

Description

Protocol Processing Method of Intelligent Network Application Protocol Area (INAPD) in AIN SSP

1 is a structural diagram of an application service element designed for an incoming billing service in an initial intelligent network.

2 is a structural diagram of various protocol stacks in a service switch (SSP) for communication with a service controller (SCP) and an intelligent information provider (IP).

3 is a structural diagram of a functional block of an intelligent network application protocol area (INAPD) mounted in an advanced intelligent network exchange.

4 is an explanatory diagram of an application service element (ASE) and related operations constituting an intelligent network application protocol (INAP) of an advanced intelligent network exchange.

5 is a flowchart of protocol processing of an intelligent network application protocol area (INAPE) in an intelligent network switch according to the present invention.

* Explanation of symbols for main parts of the drawings

1: Intelligent network application protocol area (INAPD) 2: Multiple access control function (MACF)

3: single access function control unit (SACF) 4: application service element set

5: MTIP (MACF and TCAP interface Part)

6: Application Service Element Control Unit (ACP)

7: Component control unit (CCP) 8: Dialog control unit (DCP)

The present invention relates to a protocol processing method of an intelligent network application protocol area (INAPD), which is mounted on an advanced intelligent network service switch and provides common line signal processing between other intelligent network nodes as part of research for development into an advanced intelligent network.

The Application Service Element (ASE) is a unit communication functional entity that executes application services in a network, and is a connectionless network layer service in a common line (SS No. 7) signaling network. It provides communication function for service processing that forms a distributed environment using.

Accordingly, as shown in FIG. 1, the application service element is divided into two blocks, an operation exclusion part (OPX) and a dialog operation part (DOP), according to a function thereof. Receives service primitives from an application process (AP), creates corresponding operations, determines service quality and grades, and creates components to create external components of the question and answer function application unit below the ASE. Send to the Transaction Capability Application Part, and the dialog operation unit generates and manages a dialog for transmitting and receiving a component according to the instruction of the operation execution unit. In addition, there is an external incoming billing service application process (AP) connected to the operation performing unit to provide a free phone service (FP). In addition, the application service element (ASE) configured as described above uses a signaling connection control part (SCCP) and a message transfer part (MTP) as a common block.

However, there is a problem that each time a new service is added, a specific billing service application process and application service element (ASE) for each service must be redefined and a block added to control the service.

Accordingly, the present invention devised to solve the problems of the prior art, the protocol processing method of the intelligent network application protocol area mounted on the service switch (SSP) to provide a communication function between the highly intelligent network service switch and the other network node. The purpose is to provide.

In order to achieve the above object, the present invention is in charge of the interface between the question and answer processing function application unit (TCAP) and the multiple access control function unit (MACF), the message received from the adjacent block in the function block in the single access control function unit (SACF) An MTIP (MACF and TCAP interface Part) responsible for the function of distributing data and an application service element (ASE) that controls the component and controls the component. (ACP: ASE Control Part) and a component control unit (CCP: Component Control Part) in charge of generating and transmitting components corresponding to each operation, and a dialog control unit managing dialog management for correct component transmission / reception with a counterpart node ( DCP: Single Access Control Function Unit (SACF) having a Dialogue Control Part; A set of application service elements (ASEs), which is a collection of application service elements (ASEs); And an intelligent network application protocol area (INAPD) having a multiple access control function (MACF) applied to an AIN SSP, wherein the multiple access control receives a message from an application process in an idle state. After the functional unit MACF determines the SAO (Single Association Object) and sends a service primitive to the single access control function SACF, the application service element control unit ACP in the single access control function SACF is driven. A first step of instructing the operation of the application service element (ASE) and encoding the operation after retrieving information on an operation grade and a timer related to the application service element (ASE) to be operated; After performing the first step, the component control unit (CCP) receiving a component instruction from the application service element control unit encodes a component, and the dialog control unit (DCP) generates a dialog to generate a component and a dialog by the question and answer function application unit ( TCAP) and transitioning to a message reception waiting state; In the message receiving standby state, the dialog controller prepares component reception after receiving and checking a dialog through MTIP, and the component controller receives a component through MTIP and delivers the component to the application service element controller (ACP). step ; After performing the third step, the specific application service element set receiving the operation decryption instruction from the application service element control unit ACP decodes an operation and delivers the operation to the application service element control unit ACP. The multiple access control function (MACF) receiving the service primitive from the application service element controller (ACP) includes a fourth step of transmitting a message to an application process and transitioning to an idle state.

The highly intelligent network is a network structure that enables the rapid introduction of new services and is applicable to various types of communication networks. That is, a service exchanger (SSP) serving as a gateway of an intelligent network has a form in which various services are provided by accessing a service controller (SCP) in which service logic and a database are centralized. In the highly intelligent network structure, each service consists of a combination of service features, and one service feature consists of connection of Service Independent Blocks (SIBs), and the SIB is a service switch (SSP) distributed in the network. ), Specific operation indication and operation execution exchanged between functional entities such as service controller (SCP), intelligent information provider (IP), and the like.

Therefore, the protocol structure in the initial intelligent network is inefficient for the highly intelligent network structure that centralizes the functions of network elements in one node and distributes them in the network and provides various and high quality services quickly by using the communication between these nodes. In order to facilitate the smooth evolution of the network, the International Telecommunication Union-Telecommunication standardization section (ITU-T) defines the protocol structure that must be provided between network nodes in an intelligent network (IN) CS-1 (Capability Set-1) structure that defines the development stage of an intelligent network. It is recommended, and independent research of each country is underway accordingly. Accordingly, the present invention provides a signal exchange between a service switch (SSP), an intelligent network element, a service control point (SCP) and an intelligent peripheral (IP) in an intelligent network element. By presenting protocol processing method of application protocol area for high intelligent network, various intelligent network services can be provided quickly and efficiently. On the other hand, the present invention has been experimentally mounted to the prototype of the high-intelligence network service exchange to verify the protocol function with the service controller (SCP) and intelligent information provider (IP).

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

2 is a structural diagram of various types of protocol stacks mounted inside a service switch (SSP) for communication with a service controller (SCP) and an intelligent information provider (IP) which are physical entities of a network.

As shown in the figure, the signal between the service switchboard (SSP) and the service controller (SCP) is made using a message processing function application (TCAP) message of the common line signaling method (SS No. 7). ) And ISUP (ISDN User Part), an inter-station protocol for ISDN, to provide various additional services together with call control signals. As shown in FIG. 2B, there is a communication method using a TACP or Digital Subscriber Signaling-1 (DSS1) protocol, that is, ROSE (Remote Operation Service Element) as shown in FIG. The ROSE includes the Component Sub-layer and the DSS1 (Q.932) protocol of the TCAP. In this case, the lower layer for transmission is in the form of a transaction sub-layer message. B. Call Control Message of DSS1 and Q.931 (REGISTER, FACILITY) can be used, B-channel for bearer service, public network / integrated information network (PSTN / ISDN) link, etc. This is used.

On the other hand, the service controller (SCP) and the functional information provider (IP) are directly connected to the signal network for communication between the intelligent information provider (IP) and the service controller (SCP). ) The control signal in the form of a TCAP message is directly connected to the signal network by an intelligent information provider (SS), so that the common line signaling method (SS No. 7) is the form of the TCAP message. Control signal is directly transmitted to the intelligent information provider (IP), and indirect control method is delivered to the intelligent information provider (IP) via the service switch (SSP). In Figures 2a and 2b, the area marked with * denotes between the Service Control Function (SCF) in the Service Controller (SCP) and the Specialized Resource Function (SRF) in the Intelligent Information Provider (IP). Application service elements (ASEs) for operation processing are necessary parts as a structure in which the service controller (SCP) delivers control messages to the intelligent information provider (IP) via the service switch (SSP), and if the intelligent information provider (IP) ) And the service controller (SCP) do not need to communicate directly to the common line signaling method (SS No. 7) QTA (TACP). Meanwhile, as shown in FIG. 2C, a special resource function (SRF), which is a main function of the intelligent information provider (IP), may be implemented as an internal function of the service switch (SSP).

As shown in FIG. 2A, in the highly intelligent network structure, the operation definition and the error definition are generalized to the application service element (ASE) set (3), and each application service element (ASE) is combined to transmit and receive necessary operations and the application service element. Single Association Control Function (SACF) (2) that controls (ASEs), and manages and controls mutually controlled single association objects (SAO), a single access support for communication with two or more physical entities. A block, such as a Multiple Association Control Function (MACF) (1), that provides a codec is required. According to the present invention, a set of application service elements (ASE), a single access control function (SACF), and a multiple access control function (MACF) block are grouped together and called an application protocol area, that is, an intelligent network application protocol area (INAPD) for an advanced intelligent network. It is about the function of each block in the intelligent network application protocol area (INAPD) and the interface method between blocks.

The ITU-T recommends the use of the Intelligent Network Application Protocol (INAP) for the communication between physical entities (eg SSP, SCP, IP, SDP) in the highly intelligent network. The intelligent network application protocol (INAP) is a term that collectively defines the detailed functions of these application service elements (ASE) when each application service element (ASE) is defined as a general purpose by dividing the functions based on the processing operations. (SS No. 7) It is a signaling protocol application unit (TACP) and a user unit of ISUP and DSS1 protocols, and provides operation generation and processing functions for communication with counterpart nodes.

3 is a functional block structure diagram of an intelligent network application protocol area (INAPD) for a communication protocol stack in the case of a communication method using a common line signaling (SS No. 7) QTP function.

As shown in the figure, the intelligent network application protocol area (INAPD) 1 is a set of a multiple access control function (MACF) 2, a single access control function (SACF) 3, and an application service element (ASE). An application service element (ASE) set (4). In addition, the single access control function unit SACF is responsible for the interface between the question-and-answer function application unit TCAP and the multiple access control function unit MACF, and transmits a message received from an adjacent block in the single access control function unit SACF. The MTIP (MACF and TACP interface Part) (5), which is responsible for distributing the functional blocks, and the application, which controls the components and drives the application service elements (ASE), which are responsible for the indication and operation of the appropriate oral forms. ASE control part (ACP) 6, a component control part 7 (CCP) responsible for generating and transmitting a component corresponding to each operation, and a correct component with a counterpart node. Dialogue Control Part (DCP) 8 which is in charge of managing dialogs for transmission and reception.

Next, looking at the detailed functions of each block constituting the intelligent network application protocol area (INAPD), the function of the single access control function (SACF) (3) is as follows.

1) All application service elements (ASEs) perform a function that is commonly handled.

2) It contains information on the order of operations to be created in the application service element (ASE) and is responsible for coordination and management between the application service elements (ASE).

3) Analyzes the component received through the interface with the TCAP and passes it to the corresponding application service element (ASE).

4) It analyzes the service primitive received through the interface with the application process (AP) and drives the corresponding application service element (ASE).

5) Operate the dialog.

6) The protocol performs the application context negotiation with the counterpart node in order to match the communication scheme with other physical entities.

In addition, in the highly intelligent network, in order to provide various operations, an application service element (ASE) that is responsible for encrypting, decrypting, and error checking of one or more operations is defined and managed as an application service element (ASE) set. The service element (ASE) set shall include the following functions.

1) An application service element (ASE) can create one or more operations.

2) Each application service element (ASE) has an operation definition unit and an error definition unit to generate and check an operation to perform an operation of encoding and decoding an operation.

3) If an error is detected, the single access control function (SACF) 3 is notified and the single access control function (SACF) 3 generates a primitive for error notification and recovery.

4) In order to provide various communication methods such as TCAP, ISUP, and DS1, it is responsible for encrypting and decrypting operation parameters in accordance with the format of each protocol.

4 is an application for configuring an intelligent network application protocol (INAP) mounted in a service switch (SSP) when the communication between the intelligent information provider (IP) and the service controller (SCP) is performed through the service switch (SSP). It is a list of service elements (ASEs) and their respective processing operations, which are newly proposed with reference to ITUT recommendations and application service elements (ASEs) defined by the European Telecommuni- cation Standards Institute (ETSI). In addition, in order to add various operation processing functions, adding an application service element (ASE) allows new operations to be extended. On the other hand, when receiving an operation transmission instruction from the application process (AP), the message type delivered to the intelligent information provider (IP) is applied to the application service element (TCAP), DSS1 or ISUP depending on which protocol is used. ASE) The method of encoding the operation parameters in the set changes. The functions of each application service element (ASE) described in FIG. 4 are as follows.

• Service Control Function Activation (SCF Activation) Application Service Element (ASE): When an intelligent network service trigger is detected, it operates an operation to activate the service logic of the service controller (SCP).

Connect Application Service Element (ASE): An operation instruction request and response operations generated when a DP (Detection Point) that meets a trigger condition is met during basic call processing, and the call processing state in the SSP. It handles the operations that occur in the service controller (SCP) side to control.

BCSM Event Handling Application Service Element (ASE): required by the Service Controller (SCP) to inform the Service Switcher (SSP) of the notification of a particular DP occurrence in advance and to notify the requested DP occurrence. Operate the operation.

Call Report Application Service Element (ASE): Operates operations for processing call-related information such as statistics and probability data.

Service Management Application Service Element (ASE): Restricts specific service requirements over a certain period of time for network traffic coordination and operates an operation to count a limited number.

Traffic Management Application Service Element (ASE): Operates an operation that restricts requests to be sent to the service controller (SCP) for network traffic coordination.

Call Handling Application Service Element (ASE): handles operations related to call control, such as releasing or temporarily suspending a call.

Non-Assisted Connection Establishment Application Service Element (ASE): Processes operations for connection with Intelligent Information Provider (IP) that is accessible from Service Switch (SSP).

Specialized Resourece Control Application Service Element (ASE): Operates operations related to the use of intelligent information providers (IPs), such as announcements and digit collection requests to connected intelligent information providers (IPs).

Generic Disconnect Resource Application Service Element (ASE): handles the operation of disconnecting the service exchanger (SSP) and the intelligent information provider (IP).

Charging Application Service Element (ASE): Operates an operation for processing operations related to charging.

Timer Application Service Element (ASE): Operates an operation to update the value of a specific timer in a service switch (SSP).

Cancel Application Service Element (ASE): It is responsible for operation operation to cancel any operation.

On the other hand, the multiple access control unit (MACF) 2 has the following functions.

1) The Multiple Access Control Function (MACF) manages the correlation between several SAOs. That is, when communicating with two or more network nodes, the correlation between them is adjusted.

2) When the control message transmitted from the service controller (SCP) to the intelligent information provider (IP) is a network structure via the service switch (SSP), a relay function is transmitted from the multiple access control function unit (MACF). Can provide.

3) It is responsible for distributing service primitives to SAO that conforms to the protocol of the node to send a message according to primitives received from the application process (AP).

FIG. 5 is a protocol processing flow chart when the common line signaling method (SS No. 7) QTP application unit (TCAP) is used for each inter-block interface in the intelligent network application protocol area (INAPD).

In idle state (11), when the service user presses the intelligent network service access number and other personal numbers as necessary, the application process of the service switch (SSP) that recognizes the intelligent network service requests the intelligent network service processing to the service controller (SCP). do. After receiving the intelligent network service processing request primitive from the application process (12), the multiple access control function unit (MACF) requests to run the service control function (SCF) activation application service element (ASE) corresponding to the primitive. The operation instruction is sent to the single access control function unit (SACE) of the SAO, which is a protocol correspondence block with the service controller (SCP) (13). The application service element control unit (ACP) in the single access control function unit (SACF) retrieves information on the grade and timer of an operation related to the application service element (ASE) to be driven (14) and delivers it to the application service element (ASE) set. As a result, a specific application service element (ASE) is driven (15). The application service element (ASE) generates a corresponding operation and starts parameter encoding (16). The coded operation is transmitted to the component control unit (CCP) (17), where the code is encoded by the corresponding component (18), while the dialog control unit (DCP) generates a dialog (19), which is a lower protocol layer, the question and answer function application unit (TCAP). (20) and the message reception standby state (21). On the contrary, when receiving a message from the counterpart node in the message reception waiting state 22, the TCAP converts the message into component primitives and dialog primitives, respectively, through the MTIP and the component control unit (CCP) and dialog control unit. Send to (DCP). When the dialog controller receives the dialog through the MTIP (23) and checks the dialog and prepares to receive the component (24), the component controller receives the component via the MTIP (25) and delivers the component to the application service element controller (ACP). (26). The application service element control unit (ACP) instructs decryption of the operation with the application service element (ASE) set for decryption of the operation (17). A specific set of application service elements (ASE) having received an operation decryption instruction decodes an operation (28) and transfers the result to an application service element (ASE) control unit (ACP) (29). The multiple access control function (MACF), which receives the decoding result from the application service element control unit (ACP) in the form of a service primitive, transmits a message to the application process and transitions to the idle state 11.

In addition, if an error is found during the operation decryption operation in a specific application service element (ASE), the application service element control unit (ACP) is notified that there is a protocol error, and the application service element control unit (ACP) rejects the application process (AP). Send a message to perform the rejection procedure. If the service controller (SCP) sends an operation requesting a connection to the intelligent information provider (IP) to the service switch (SSP) for the announcement and digit collection, the service switch (SSP) is a direct connection establishment application service element It attempts to connect with Intelligent Information Provider (IP) by driving (ASE). When the intelligent information provider (IP) and the bearer channel (bearer channel) are connected, the service exchanger (SSP) may request an announcement service from the service controller (SCP) or a service user information input request operation from the special resource control application service element (ASE). It drives to deliver to the intelligent information provider (IP), and delivers the information collected from the service user to the service controller (SCP).

In the present invention as described above, the service switch (SSP) is a common line signaling method (SS No. 7) with the service controller (SCP) ALC intelligent information provider (IP) which is each element of the network through the intelligent network application protocol area (INAPD). Communication using signal and DSS1 is possible, and even when new service is added, operation can be indicated and operated through common application service element without modification of block.

Claims (2)

MTIP (MACF), which is responsible for the interface between the TCAP and the MACF, and distributes the messages received from adjacent blocks to the functional blocks in the SACF. and an application service element (ASE) control unit (ACP: ASE Control Part) (ACP) responsible for driving and controlling components of the application service element (ASE) that will be responsible for the instruction and operation of the TCAP interface part (5) and appropriate operations. Component control part (CCP) (7), which is responsible for generating and transmitting components corresponding to each operation, and a dialog control part (DCP: Dialogue) which manages dialogs operated for correct component transmission / reception with a counterpart node. A single access control function (SACF) 3 having a control part (8); an application service element (ASE) set (4) which is a collection of application service elements (ASEs); A method in which an intelligent network application protocol area (INAPD) 1 having a functional unit (MACF) 2 is applied to an AIN SSP for an advanced intelligent network service, wherein the message is received from an application process in an idle state. After the access control function (MACF) determines the SAO (Single Association Object) and sends a service primitive to the single access control function (SACF), the application service element control unit (ACP) in the single access control function (SACF) In the first step (11 to 16) of encoding the operation by instructing the operation of the application service element (ASE) after retrieving information on the grade and timer of the operation related to the application service element (ASE) to be driven; After performing steps 11 to 16, the component control unit (CCP) receiving the component instruction from the application service element control unit encodes a component and the dialog control unit (DCP) A second step (17 to 21) of generating an dialog and transmitting a component and a dialog to the question and answer function application unit (TCAP) and transitioning to a message reception waiting state; In the message reception standby state, the dialog controller prepares component reception after receiving and checking a dialog through MTIP, and the component controller receives the component through MTIP and delivers the component to the application service component controller (ACP). (22 to 26); And after performing the third step (22 to 26), the specific application service element (ASE) set that has received an operation decryption instruction from the application service element control unit (ACP) decodes the operation to perform the application service element (ASE) control unit (ACP). ), And the multiple access control function (MACF) receiving the service primitive from the application service element control unit (ACP) transmits a message to an application process and transitions to an idle state (27 to 31). A method for processing a protocol of an intelligent network application protocol area (INAPD) in an AIN SSP. The operation decryption process of a specific application service element (ASE) in the fourth step (27 to 31), if an error is found during decryption, notifies the application service element control unit (ACP) of a protocol error. The ACP may further include a fifth step of performing a rejection procedure by transmitting a reject message to an application process (AIN SSP). Protocol processing method of intelligent network application protocol area (INAPD) in.