KR100630053B1 - Implementation and Execution Method of Service Switching Unit to Manage Call Processing Operation in Intelligent Network Switching System - Google Patents

Abstract

The present invention relates to a method of implementing a service switching unit (SSF) of an intelligent network switching system for processing an intelligent network (IN) service according to the ITU-T IN CS1 recommendation. Implementation of a Service Switching Unit (SSF) that satisfies SSME and manages call processing operations of all Basic Call Processing Units (BCSMs) and Finite State Machines (FSMs) in Service Switching Units (SSFs) associated with intelligent network services. And a method of executing the same. In the present invention, when a service start message is applied from the service control unit (SCF) to the service exchange unit (SSF), the received message is analyzed after the authorized message is received, and generated in the service exchange unit (SSF). An intelligent network exchange manager (IN-SM) is generated to perform an operation corresponding to a message requesting service start from the predetermined basic call processing unit (BCSM) to the service control unit (SCF), and the intelligent network exchange manager (IN-SM). ), A substantial interface operation with the service control unit (SCF), management of basic call processing units (BCSMs) generated under a predetermined service, and a service control message authorized by the service control unit (SCF) And an operation of processing the service control message directly in each basic call processing unit (BCSM). State Model (IN-SSM) in the intelligent network switching system such that the generated features the implementation of services switching unit (SSF).

Description

Implementation and Execution Method of Service Switching Unit to Manage Call Processing in Intelligent Network Switching System

The present invention relates to a method for implementing a service switching function (SSF) of an intelligent network switching system for processing an intelligent network (IN) service according to the ITU-T IN CS1 recommendation. Service exchange that satisfies (SSF Management Entity) and manages call processing operations of all BSMs and finite state machines (FSMs) in the service switching unit (SSF) associated with intelligent network services. It relates to a method of implementing a part (SSF).

Looking at Q.1219 of the ITU-T CS1 Recommendation, the structure of the Service Switching Unit (SSF) for receiving an Intelligent Network (IN) Service is a service for each Basic Call State Model (BCSM). It is recommended to have a Service Switching Function-Finite State Machine (SSF-FSM). For reference, in the present specification, a finite state machine refers to a process in which the number of states that can have is finite, which is referred to as a basic call processing unit (BCSM) or other functional units mentioned in the present application specification. This is because the process is created under the environment.

On the other hand, the SSF-FSM structure recommended in ITU-T IN CS1 Recommendation Q.1219 is shown in Figure 1 attached, which represents the state transition of the basic call processing unit (BCSM) required to process intelligent network calls.

Referring to the state illustrated in FIG. 1, state a represents an idle state, state c represents a command waiting state, state d represents a user interaction state, state e represents a temporary connection state, and state f represents a monitoring state. The transition of states is represented by e1-e16.

Each SSF-FSM having a state transition as shown in FIG. 1 is serviced in conjunction with other functions, that is, service control unit (SCF) and service data unit (SDF). A service flow showing an example of the operation of exchanging control messages is shown in FIGS. 2 and 3 attached.

2 and 3 illustrate a service flow for tracking a malicious call among various intelligent network call processing services. For reference, FIGS. 2 and 3 are contents described in Recommendation Q.1219.

2 and 3 according to the recommendation, the service switching unit (SSF) and the service control unit (SCF) give each other a Transaction Application Part (TCAP) message when processing an IN service. I can see that I am supposed to receive it. Meanwhile, the TCAP message transmitted and received between the processes illustrated in FIG. 2 is composed of a transaction part and a component part, and the transaction part performs the following intelligent network service. A series of necessary message flows are managed, and the component part contains data to be actually processed.

Therefore, referring to the drawings, it can be seen that the TCAP message is performing call processing of the intelligent network service through the TC-Begin, TC-Continue, TC-End, etc. to the transaction unit. Receive direct control of the service control unit (SCF) through each session (TC-Begin, TC-Continue, TC-End) for the FSM and process it in the SSF-FSM structure in the service exchange unit (SSF). It can be seen that.

On the other hand, Figure 4 attached is a service exchanger showing the control data flow when the SSF-FSM of the basic call processing unit (BCSM) has an interface with the service control unit (SCF) when processing the intelligent network service according to the ITU-T IN CS1 Recommendation (SSF) is a structural diagram. That is, as shown in the ITU-T IN CS1, the SSF-FSM paired with the basic call processing unit (BCSM) pairs with a direct interface with the service control unit (SCF), assuming arbitrary data flow diagram to be.

In the structure as shown in FIG. 4, 53 intelligent network access protocols (Intelligent Network Access) to be carried in the component part of the TCAP message exchanged between the service control unit (SCF) and the service exchange unit (SSF) for the intelligent network service progression. Most of the Protocol (INAP) messages are activated SSFs that have interfaces with Service Logic Program (SLP) instances that directly process and control intelligent network services within the Service Control Unit (SCF). You will notice that the FSM receives and processes it directly. The 53 INAP messages are numerical values based on the number of messages defined by ITU-T.

However, because the ITU-T Recommendation recommends that each SSF-FSM only have information about the parts it represents, and that it seeks to pursue an independent structure that can only control those parts, ongoing services can If a specific action of SSF-FSM of all related parts is required beyond control, the location of a process having a function of performing the processing concretely becomes ambiguous.

As an example of this, the Initial Call Attempt INAP Message requires the creation of a new Originating Basic Call Processing Unit (BCSM), and is an incoming call derived by the generated Originating Basic Call Processing Unit (BCSM). (Terminating) This is a message that is expected to create a basic call processing unit (BCSM), but if the message is generated and sent to the SSF-FSM that is already functioning to request processing, there is a problem that the control of the SSF-FSM is exceeded. do. Therefore, the call control function (CCF) level must be created to generate the correct new basic call processor (BCSM) and configure the corresponding SSF-FSM to process the initial call attempt (Initiate Call Attempt) message. You can do that. This is clarified in reference to recommendation Q.1218 shown in FIG. 1, where the initial call attempt message is e3 (Transit3) only when going from state a "Idle State" to state c "Waiting For Instruction State". It indicates that it can be received and processed through, which, when the basic call processing unit (BCSM) configures the SSF-FSM before receiving the initial call attempt message and initialized to the idle state (Idle) when receiving the initial call attempt message It means you have to wait until.

However, in the structural diagram shown in FIG. 4 according to the recommendation, the existing SSF-FSM directly receives an Initial Call Attempt message, which is ambiguous in actually implementing the service switching unit (SSF). It can be seen that the implementation method.

In addition, as an example of an intelligent network service, in performing a service such as a call transfer in-service (Call Transfer IN-Service), a party to be newly connected with a party listening to a Hold Tone (C-Party; Transfered Party) Processing at the point where management is needed throughout the call, rather than requiring processing only to the SSF-FSM of the particular party involved in the call, such as the Concept INAP message. In this case, it can be seen that it is difficult to request processing from either SSF-FSM. This means that although each SSF-FSM only has information related to the end user it manages, there is a need for service processing such as Concept INAP messages to manage and use comprehensive call information at a higher level. Because it requires.

Section 3 of Recommendation Q.1218 refers to SSME-Control and SSME-FSM as the SSF Magement Entity (SSME), which can be viewed as a solution for the control of services across the board. However, this is a conceptual recommendation, and its implementation is insufficient to overcome the above-described problems found in the actual operation of the intelligent network switching system.

Accordingly, it is an object of the present invention to ensure that the present invention satisfies the IN-SSME (SSF Management Entity) as described above, particularly in the ITU-T IN CS1 Recommendation, and at the same time all basic calls in the Service Switching Part (SSF) associated with the intelligent network service. The present invention provides a method of implementing a service switching unit (SSF) for managing call processing operations of a processing unit (BCSM) and a finite state machine (FSM).

In another aspect, the object of the present invention is to focus on the SSME-Control of the ITU-T IN CS1 recommendation as described above, in the first half of all the basic call processing units (BCSMs) and SSF-FSMs created in association with intelligent network call services. To present a method of call management.

Accordingly, the present invention proposes to implement a method of generating a module that directly manages and controls related users in the service switching unit (SSF) in an intelligent network service, and activates the generated module for each service.

That is, in order to achieve the above objects, the present invention, when a service start message from the service control unit (SCF) is authorized to the service switching unit (SSF), the received message is analyzed after the authorized message is received An intelligent network exchange manager (IN-SM) for performing an operation corresponding to a message for requesting service start from a predetermined basic call processing unit (BCSM) generated in the service switching unit (SSF) to the service control unit (SCF). Is generated, and receives a predetermined service processing control right from the intelligent network exchange manager (IN-SM), manages a substantial interface with the service control unit (SCF), and manages basic call processing units (BCSMs) generated under a predetermined service; Processing a service control message authorized by the service control unit (SCF), and the service control message is transmitted by each basic call processing unit (BCSM). We propose a method of implementing a Service Switching Unit (SSF) in an intelligent network switching system for generating an IN-SSM which performs a direct processing operation.

DETAILED DESCRIPTION A detailed description of preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Here, the accompanying drawings refer to FIGS. 1 and 2, 3, and 4 described above and FIG. 5, which is a view according to the present invention.

First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, terms to be described below are terms defined in consideration of functions in the present invention, and may vary according to the intention or custom of a user or a program designer, and the definitions should be made based on the contents throughout the present specification.

On the other hand, prior to the detailed description of the present invention, a summary of the implementation method for achieving the above object and technical problem of the present invention will be described below.

First, in order to implement the service switching unit (SSF) of the intelligent network switching system according to the present invention, the intelligent network service state model (process) having a management function of the SSF-FSM of the basic call processing unit (BCSM) included in the service ( By allowing instances of IN-SSM to independently and directly interface with the service control unit (SCF), the service control unit (SCF) uses the basic call processing unit (LG) with logical call ID and leg ID. Implement a way to manage BCSMs.

Second, it implements an effective method of handling some INAP messages that could not be handled in SSF-FSM of any BSM. Examples of INAP messages that could not be processed are Add Party, Attach, Change Parties, Detach, Hold Call Party Connection messages, etc., and this is a suggestion to implement an effective method of processing these messages.

Third, implement the plan to expand the structure of the service switching unit (SSF) to prepare for future ITU-T intelligent network recommendations, which is described in IN-SSME (Refer to Q.1218 above). SSF Management Entity).

Under the three basic methods presented above, the implementation of the service switching unit (SSF) of the intelligent network switching system according to the present invention.

Under the three schemes presented above, a detailed description of the invention is described below with reference to the accompanying FIG.

4 is a service exchanger (SSF) showing the control data flow when the SSF-FSM of the basic call processing unit (BCSM) has an interface with the service control unit (SCF) when processing an intelligent network service according to the ITU-T IN CS1 recommendation. As a schematic of the. This is a structure diagram for managing and controlling the basic call processing units (BCSM) related to the call in the service switching unit (SSF) at the high level when processing the IN service proposed in the present invention.

Referring to FIG. 4, first, when detecting a service request, an intelligent network switching manager (IN-SM) is created to process a service start message primarily. The generation of the intelligent network exchange manager (IN-SM) is for generating entities to proceed with the service flow generated later through the intelligent network exchange manager (IN-SM).

On the other hand, the intelligent network exchange manager proposed in the recommendation is to be a process that interacts with the service control unit (SCF) in performing the process of providing the intelligent network service features to the user, which is the intelligent network exchange manager (IN-SM) In order to perform the operation of informing the SSF / CCF of the call / access processing operation to the service control unit (SCF), it is proposed to use the capabilities and resources of the SSF / CCF. It also manages the service switching unit (SSF) resources required to detect intelligent network call / connection processing events to be reported to the service control unit (SCF) or to support the intelligent network service logic instances in order to activate the intelligent network service logic (SLP) instance. It is proposed to have a function.

However, the actual implementation of the IN-SM mentioned in the above recommendation is not presented.

Accordingly, in the present invention, when the intelligent network exchange manager (IN-SM) generates a TCAP Begin message when an intelligent network service request is received from a predetermined basic call processing unit (BCSM) instance, the intelligent network exchange manager (IN-SM) detects the message. The intelligent network exchange manager (IN-SM) generates an intelligent network service state model (IN-SSM) instance, which is a separate process for handling a requested service, and generates the generated intelligent network service state model (IN-SSM). Allow a function of sending the received TCAP Begin message to the Service Control Unit (SCF). Therefore, when the service control unit (SCF) informs the service exchange unit (SSF) of the start of the service, the first module to receive and analyze the message becomes the intelligent network exchange manager (IN-SM), and similarly the service exchange unit (SSF) Among the basic call processing units (BCSMs) in the network, the first destination of a message requesting the service control unit (SCF) to start a service also becomes an IN-SM.

As a result, the IN-SM implemented according to the present invention only performs an operation of generating an IN-SSM instance to manage the intelligent network service.

Next, as mentioned earlier, the intelligent network service state model (IN-SSM) generated by the intelligent network exchange manager (IN-SM) has the following functions.

First, the intelligent network service state model (IN-SSM) is implemented to collectively manage the basic call processing unit (BCSM) having a substantial interface with the service control unit (SCF) and placed under any service. In addition, it is implemented to process a service control message received from the service control unit (SCF) and, in some cases, the SSF-FSM of each basic call processing unit (BCSM) to hand over to the direct processing. In other words, an independent IN-SSM instance per service is created by the IN-SM and transfers the service right from the IN-SM to the activity. It will be started.

On the other hand, the IN-SSM generated by the IN-SM is not mentioned in the ITU-T Recommendation as described above. The function of the intelligent network service state model (IN-SSM) according to the present invention is only mentioned in the recommendation related to the intelligent network exchange manager (IN-SM). As a result, the intelligent network service state model (IN-SSM) generated by the intelligent network exchange manager (IN-SM) becomes an entity implemented according to the present invention.

Referring to the function of the intelligent network service state model (IN-SSM) implemented in accordance with the present invention below, each instance of the intelligent network service state model (IN-SSM) is a basic call processing unit (BCSM) associated with the call requesting the service Manage them. In addition, through the interface with the TCAP Rx / Tx unit, an event message for service progress from the service logic unit (SLP) can be sprayed to the appropriate basic call processing unit (BCSM) for processing, or in some cases, directly. In addition, each of the basic call processing units (BCSM) receives a report (Report) necessary for the service progress is also delivered to the service logic (SLP).

On the other hand, the destruction time of the IN-SSM instance created in accordance with the present invention is the case where the managed BCSM instance is no longer in the actual state, depending on the service It may be after the processing of the service progress message.

In conclusion, when the service initiation message is applied from the service control unit (SCF) to the service switching unit (SSF), the received message is analyzed after the authorized message is received, and the service exchange unit (SSF) is analyzed. An intelligent network exchange manager (IN-SM) is generated to perform an operation corresponding to a message requesting service start from the generated basic call processing unit (BCSM) to the service control unit (SCF), and the intelligent network exchange manager (IN-). Subsequently, a predetermined service processing control right is transferred from the SM, and a substantial interface operation with the service control unit (SCF), an operation of managing basic call processing units (BCSMs) generated under a predetermined service, and service control authorized by the service control unit (SCF) An intelligent network for processing a message and directly processing the service control message in each basic call processing unit (BCSM) Service state model is to ensure that practically services switching unit (SSF) is implemented to operate so as to generate a (IN-SSM).

As described above, the generation of the intelligent network service state model (IN-SSM) according to the present invention provides a practical implementation method capable of independently handling the control message of the intelligent network service transmitted by the service control unit (SCF). As a result of the scalability of the SSF structure, it satisfies the initial structure of IN-SSME (SSF Management Entity) mentioned in the ITU-T IN CS1 Q.1218 Recommendation, and accordingly, May be used to prepare ITU-T Recommendations.

1 is a view showing the SSF-FSM structure of each basic call processing unit (BSCM) in the intelligent network switching system according to the ITU-T IN CS1 Recommendation.

2 and 3 are control flowcharts of a service control message corresponding to a service for tracking a malicious call in an intelligent network switching system according to the ITU-T IN CS1 recommendation.

4 is a block diagram of a service switching unit (SSF) showing the control data flow when the SSF-FSM of the basic call processing unit (BCSM) has an interface with the service control unit (SCF) when processing an intelligent network service according to the ITU-T IN CS1 recommendation. Structure diagram.

5 is a structural diagram of a service switching unit (SSF) showing the data control flow when the SSF-FSM of the basic call processing unit (BCSM) has an interface with the service control unit (SCF) in the intelligent network service processing according to the present invention.

Claims (2)

A method of implementing and executing a service switching unit for managing call processing operations of all basic call processing units (BCSMs) and finite state machines (FSMs) in a service switching unit (SSF) of an intelligent network switching system, Generating an intelligent network exchange manager (IN-SM) for performing an operation corresponding to the message upon recognizing occurrence of a message requesting service start to the service switching unit (SSF); The intelligent network switching management manages basic call processing units generated by the service switching unit (SSF), processes the message, and performs an operation of processing the message in each basic call processing unit. A method of implementing and executing a service switching unit in an intelligent network switching system including generating an IN-SSM). In the implementation and execution method of the service switching unit for managing all the basic call processing unit (BCSM) and call processing operations in the service switching unit (SSF) of the intelligent network switching system When the BSM sends a TCAP Begin message to an IN-SM upon request of any intelligent network service, the intelligent network exchange manager handles the requested service and sends the received TCAP Begin message. Creating an intelligent network service state model (IN-SSM) instance for sending to the service control unit (SCF); Each generated intelligent network service state model instance delivers a service progress event message transmitted from a service logic unit (SLP) to a basic call processing unit, receives a report required for service progress from each basic call processing unit, and receives the report. A method of implementing and executing a service exchange unit comprising a process of transferring to a wealth.