JPH08256366A - Special resource function control method and IN call control module - Google Patents

Abstract

(57) [Abstract] [Object] The present invention relates to a method for controlling a special resource function in an intelligent network and an IN call control module, and to send / receive information between a terminal and a switch under arbitrary independent conditions for a plurality of arbitrary terminals at the same time. It is an object of the present invention to provide a special resource function control method that enables the above. A method of controlling a special resource function in a switching network having an intelligent network function, wherein the service control function SCF is changed to the service switching function SSF or the service control function SCF is changed to the special resource function for the special resource function control SRF. Include the terminal identification information on which the special resource function SRF operates as a parameter for all operations sent to the SRF.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of controlling a special resource function in an intelligent network and an IN call control module.

[0002]

2. Description of the Related Art Intelligent network (I
(N: Intelligent Network) classifies and organizes the functions of the network, and logically combines the functions of the conventional exchanges into a transmission layer function and a high function layer function. The layer is provided with a basic call connection function represented by a simple connection between terminals and a function (SSF) for driving hardware such as a switching switch according to an instruction from the high function layer. On the other hand, in the high function layer, the functions that manage the programs and data of new services, the function that drives the transmission layer and actually execute the service, and the functions that are complicated and require great flexibility are provided. .

FIG. 7 shows an example of the system configuration of this intelligent network. In the figure, 1 is a service control point (SCP) of the high function layer.
Point) and the service control function (SCF: Service Co)
ntrol Functionality) is deployed. 2 is a service switching point (SSP) in the transmission layer, which is a call processor (CRP).
3. Call path connection module (DSM: Digital Switchin
g Module) 4, PCM link control device (DigitalTermina
l) 5, No.7 MTP level 2 controller (CSE: Com
mon Channel Signaling Equipment) 6 and other hardware configurations. The call processor 3 has a service switching function (SSF).
y), Specialized Resource Function (SRF)
Functionality) etc. are deployed.

Here, the service control function SCF has a function of intelligent network service logic to answer a service request and instruct control of a call.
The call control function CCF corresponds to the conventional call connection control function. The service switching function SSF is a call control function CC
F is a function of mediating between the service control function SCF and the service control function SSF.
F can receive commands from the service control function SCF. The special resource function SRF is a function that provides special resources necessary for executing the service provided by the intelligent network, and examples of these resources include a digit receiver, an announcement device, and a conference bridge.

Here, in this conventional system, an operation procedure for connecting to a predetermined terminal (such as a subscriber line or a trunk) accommodated in the service exchange point SSP and sending a predetermined announcement to the terminal will be described. First, the service control point SCP to the service exchange point SS
Resource connection request to P for provisional special resource
The (Connect to Resource) operation is sent, the special resource function SRF is activated, and the SSP switch and the terminal are connected. Then, the service control point SCP sends an operation of an announcement request (Play Announcement), and sends a predetermined announcement to the same terminal. In this conventional system, the number of terminals connected to one call is usually one, so that the content of the announcement request sent to that terminal is uniquely determined.

[0006]

The conventional intelligent network call control mechanism does not have a function of simultaneously and independently transmitting and receiving information between a plurality of terminals (subscriber line or trunk) and the SSP switch.
Therefore, even in the conference telephone service, for example, the terminal a
It was impossible to perform a process of waiting for the reception of the DTMF digit while sending the announcement A to the above, the announcement B to the terminal b, and the announcement X to the terminal x.

The reason for this is that INAP (Intelligent), which is a conventional protocol for intelligent networks.
In the Network Application Protocol), the SRF is used for the resource connection request operation for connecting the special resource function SRF that controls the transmission and reception of information between the terminal and the exchange.
An operation that specifies what information is to be sent and received between the terminal and the exchange, even if the connection target terminal identification information (hereinafter simply referred to as the terminal identification information Leg ID) is included (for example, a user information collection request ( Prompt and Collect U
ser Information) and announcement request (Play Announcemen
This is because the terminal identification information Leg ID is not included in [t), etc.].

As a result, it is possible to send and receive information between a terminal and a switch under any condition to any one terminal.
It has not been possible to simultaneously send and receive information between a terminal and an exchange under arbitrary conditions with respect to arbitrary plural terminals. Further, due to the above restrictions, even the existing intelligent network call control module has not been configured in consideration of the fact that a plurality of special resource functions SRF simultaneously act on the same call.

The present invention has been made in view of such problems, and in an intelligent network,
Terminals under the independent condition at the same time for arbitrary multiple terminals
It is an object of the present invention to provide a special resource function control method that enables information exchange between exchanges.

[0010]

In order to solve the above-mentioned problems, according to one aspect of the present invention, there is provided a special resource function control method in a switching network having an intelligent network function. For the SRF to include the terminal identification information on which the special resource function SRF acts as a parameter for all operations sent from the service control function SCF to the service switching function SSF or from the service control function SCF to the special resource function SRF. A featured special resource function control method is provided.

According to this special resource function control method, in one call using a plurality of terminals, one of the plurality of terminals is designated to specify the service control function SCF.
To service switching function SSF or special resource function S
By sending the control operation of the special resource function SRF to RF, the special resource function SRF is made to act on the other terminals under conditions independent of the one terminal, and this is also sequentially applied to the other terminals. By repeating
The special resource function SRF can be configured to act on any of a plurality of terminals under independent conditions.

In another aspect of the present invention,
An IN call control module for an intelligent network for performing the control method of the special resource function SRF, wherein the IN call control module and another module are separated, and the IN call control module is separated from the other module. An event receiving unit that receives an event, an SSF control unit that controls the state of the service switching function SSF, and an SRF control unit that controls the state of the special resource function SRF. The event receiving unit receives one event as call control information. Section and the information used by the SSF control section are assigned only one unit, and the information used by the SRF control section is assigned n units (n is a plurality), so that n kinds of independent conditions can be simultaneously applied to one call. And the special resource function SRF is
An IN call control module is provided which is characterized by operating on a number of terminals.

This IN call control module uniquely assigns a number to each unit of the call control information used by the special resource function SRF, uses the number as an SRF number, and uses the event reception unit and the SSF. The call control information used by the control unit may be configured to include, as SRF connection information, information for managing the open / close of the unit corresponding to the SRF number and the terminal identification information on which the special resource function SRF operates. .

Further, in this IN call control module, when the connection request operation of the special resource function SRF is received, the event receiving section sends the information designated by the operation to the SSF control section, and the SSF control section. Refers to the SRF connection information above and finds an empty SR
Obtain the F number, and use the SRF number as a parameter,
After sending the SRF connection request to the SRF control unit, it is possible to configure to set the blockage information corresponding to the SRF number to block.

Further, when the IN call control module receives an operation for designating the information transmission / reception condition between the special resource function SRF and the terminal, the event reception unit uses the terminal identification information included in the operation as a key. The SRF connection information is searched for, the SRF number having the matching terminal identification information is obtained, and the SRF number and the information designated by the operation are sent to the SRF control unit, and the SRF control unit sends the SRF number to the SRF number. The operation information can be stored in a corresponding unit area of the call control memory, and information can be transmitted and received between the special resource function SRF and the terminal under specified conditions.

Further, in the IN call control module, when the disconnection request operation of the special resource function SRF is received, the event reception unit sends the information specified by the disconnection request operation to the SSF control unit, and the SSF control unit. The control unit searches the SRF connection information using the terminal identification information included in the disconnection request operation as a key, obtains the SRF number with which the terminal identification information matches, and issues the SRF release request with the special resource function SRF as a parameter. It can be configured to send to the SRF control unit and then set the empty / closed information corresponding to the SRF number to empty.

The special resource function control method of the present invention will be described with reference to FIG. First, in order to connect the special resource function SRF, the service control function SCF sends a resource connection request (Connect to Resou) to the service switching function SSF.
ce) operation is sent. The information at this time is S
Since the RF connection target terminal also includes the information specified by the terminal identification information Leg ID, different terminal identification information Leg IDs (Leg ID = a, Leg ID = B in the example of FIG. 1) are included in a plurality of resource connection request operations. If you add and send
Multiple terminals can be optional.

Next, in order to specify information transmission and reception between the terminal and the exchange, the service control function SCF sends a special resource function SRF an announcement request (Play Announcement) and a user information collection request (Prompt and Collect User Informatio).
Send operations such as n). The information at this time also includes the terminal identification information Leg ID (Leg ID = a, Leg I in the example of FIG. 1).
By including D = b), the SRF connection terminal can be designated with respect to the plurality of terminals that have become arbitrary as described above.

The call control information used by the special resource function SRF is obtained from the IN call control memory. By storing the SRF information in the SRF information memory block of the IN call control memory and uniquely assigning a number to the memory block, corresponding information can be obtained by the number. Therefore, from the above, information can be transmitted and received between the terminal and the exchange under the condition that the plurality of terminals are completely independent at the same time, and the plurality of special resource functions S
RF can act on the same call at the same time

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a diagram showing the configuration of a service switching point SSP (IN call control switch) which performs the method of controlling the special resource function of the present invention. In FIG. 2, 20 is an IN call control module, which includes an event reception unit 21, an SSF control unit 22, and an SRF control unit 23. 24 is an MTP part (Mess
age Transaction Part: Message / Transaction part), 25 is SCCP part (Signalling Connection Cont)
rol Part: signal connection control part), 26 is a TCAP part (Trans
action Capabilities Application Part). 27 is an INAP control module, 29 is a timing control module, and 28 is a terminal control module. Terminal control module is SRF
Connection control to terminals (subscriber line 211 and trunk 210) is performed according to an instruction from the control unit 23.

In the IN call control module 20 described above, the event reception section 21 analyzes an event coming from another module and sends it to the SSF control section 22 or the SRF control section 23.
The SSF control unit 22 and the SRF control unit 23 perform predetermined state transition processing in response to the input of the event, thereby activating other modules as necessary.

Here, the IN call control module 20 is shown in FIG.
It has an IN call control memory having the configuration shown in FIG. In this IN call control module, in order to control one call,
The following memory blocks (memory units) are used in the IN call control memory. SSF / SRF common information memory block (AINBCOM): 1 / call SSF information memory block (AINBSSF): 1 / call SRF information memory block (AINBSRF): n / call In other words, per call, One SSF / SRF common information memory block in the IN call control memory
AINBCOM and one SSF information memory block AINBSS
F and n SRF information memory blocks AINBSRF # 1
~ # N are assigned.

In the SSF information memory block AINBSSF, SRF information memory block connection information (AINBSRF connection information) having the structure shown in FIG. 5 is stored. This AI
NBSRF connection information is n SRFs in IN call control memory
Information memory blocks AINBSRF # 1 to #n (AINBSRF numbers # 1 to #n) corresponding to SRF numbers (1) to
Memory block AI for SRF information with (n) as a key
NBSRF air blockage and the SRF information memory block AI
When NBSRF is used (closed), connection target terminal information (terminal identification information Leg ID) is stored.

The SRF information memory block AINBSR
The empty block of F is indicated by the B / I flag. When the B / I flag is "0", it indicates an idle state, and when it is "1", it indicates a busy state. Further, as the terminal identification information Leg ID, a normalized number that can uniquely identify a terminal among the service control function SCF, the service switching function SSF, and the special resource function SRF can be used. Alternatively, the telephone number of the subscriber corresponding to the terminal can be used.

As an operation example of the system of the embodiment of the present invention,
In the system configuration shown in FIGS. 2 and 7, two terminal ICTs (ingress trunk: terminal identification information Leg ID =
a) and OGT (outgoing trunk: terminal identification information Leg ID =
For b), a control method for simultaneously sending out different announcements A and B will be taken up. FIG. 1 is a sequence diagram showing an information sequence between a service switching point SSP and a service control point SCP in this operation example, and FIG. 6 is an SSF controller 22 and an SRF in this operation example.
6 is a flowchart showing an operation procedure of the control unit 23.

(1) The points in the SSP-SCP information sequence are as follows. The service control point SCP is first of all the designated terminal (here, the ingress trunk ICT with the terminal identification information Leg ID = a).
And a resource connection request operation to connect the special resource function SRF to the outgoing trunk OGT with the terminal identification information Leg ID = b. The designated terminal is designated by the terminal identification information Leg ID = a, b which is a parameter added to this resource connection request operation.

Next, the service control point SCP sends an announce request operation to the service switching point SSP in order to specify a condition for transmitting / receiving information between the service switching point SSP and the terminal (eg, announcement type). At this time, the terminal identification information Leg ID indicating which terminal this announcement request operation is applied to is included in the same operation. That is, the operation of announcement A for the incoming trunk ICT includes Leg ID = a, and the operation of announcement B for the outgoing trunk OGT includes Leg ID = b.

When disconnecting the special resource function SRF, the service control point SCP sends a temporary disconnection request (Disconnect Forwah) to the service switching point SSP.
rd Connection) operation. Also in this, the terminal identification information of the terminal to be disconnected Leg ID (= a, b)
Is included.

(2) The operation of the service switching point SSP for the sequence of FIG. 1 will be described below with reference to the flowchart of FIG.

Operation when Receiving Resource Connection Request Operation 1) In FIG. 2, the resource connection request from the service control point SCP is MTP section 24, SCCP section 25, T
The event is input to the CAP unit 26 and the INAP control module 27, and the INAP control module 27 activates the event receiving unit 21 when receiving the resource connection request operation. The event reception unit 21 has a function of determining the received message, and if the received message is a resource connection request, sends it to the SSF control unit 22.

2) When the SSF control unit 22 receives the resource connection request (step S2), the SSF control unit 22 stores the S in the IN call control memory.
The contents of the AINBSRF connection information of the memory block AINBSSF for SF information are checked, and by the empty / busy information (= B / I flag) of each SRF number (1) to (n) in this AINBSRF connection information,
Secure a free SRF number (j) (step S
3), for this SRF number (j), set the B / I flag to "1" and set the special resource function SR
The terminal identification information Leg ID in the resource connection request operation is written as information for managing the terminal identification information on which F acts (step S4). And the SRF number (j)
Is used as a parameter, and the SRF connection request is sent to the SRF controller 23
To (step S5).

3) The SRF controller 23 receives the received SRF.
Based on the connection request, the SRF information memory block AINBSRF #j designated by the request is initialized (step S14), and the next event reception is waited (step S1).
5).

4) As a result, the special resource function SRF refers to the call control memory and connects the terminal of the terminal identification information Leg ID (Leg ID = a, Leg ID = b) specified by the resource connection request to the exchange. To do.

Operation at the time of receiving the announcement request operation 1) The event receiving unit 21 refers to the AINBSRF connection information in the SSF information memory block AINBSSF with the terminal identification information Leg ID during the announcement request operation as a key,
The terminal identification information LegID of all SRF numbers that are in use (= B / I flag is "1") is checked, and the SRF number (the received terminal identification information during the announcement request operation matches the stored terminal identification information) ( j) is obtained. Then, the SRF number (j) and the information designated by the received announcement request operation are sent to the SRF controller 23 as input information.

2) The SRF controller 23 stores the operation information (designated announcement) in the SRF information memory block AINBSRF #j corresponding to the number (j) in the IN call control memory (step S17). With this,
The special resource function SRF sends a designated announcement to the connection terminal according to its content. The SRF control unit 23 waits for the reception of the next event (step S18).

Operation at the time of receiving the line disconnection request operation 1) When the event reception unit 21 receives the line disconnection request operation, the SSF receives the line disconnection request as an input.
The control unit 22 is activated.

2) The SSF control section 22 refers to the AINBSRF connection information in the SSF information memory block AINBSSF, using the terminal identification information Leg ID in the line disconnection request as a key, and refers to the terminals of all SRF numbers in use. Identification information The Leg ID is checked and the terminal identification information Le during the received line disconnection request operation Le
SRF with matching g ID and stored terminal identification information
The number (j) is obtained (step S8). And that SR
SR the SRF release request with F number (j) as a parameter
It is sent to the F control unit 23 (step S9), and after the sending,
The B / I flag of the SRF number (j) of the AINBSRF connection information is set to "0" (step S10).

3) The SRF control unit 23 receives the SRF release request and clears the SRF information memory block AINBSRF #j. 4) The special resource function SRF disconnects the terminal that has been connected until then.

By the above method, information transmission / reception between the terminal and the exchange can be performed on a plurality of terminals at the same time under independent conditions.

[0039]

As described above, according to the present invention, it is possible to simultaneously send and receive information between a terminal and a switch to an arbitrary plurality of terminals under independent conditions in an intelligent network.

[Brief description of drawings]

FIG. 1 is a diagram showing an information sequence between a service switching function SSP and a service control function SCF according to the present invention.

FIG. 2 is a diagram showing a configuration example of an IN call control module as one embodiment of the present invention.

FIG. 3 is a diagram illustrating a connection form in the case where an announcement is simultaneously sent to different terminals in the embodiment of the present invention.

FIG. 4 is a diagram showing a configuration example of an IN call control memory in the embodiment of the present invention.

FIG. 5 is a diagram showing a configuration example of AINBSRF connection information in an IN call control memory in the embodiment of the present invention.

FIG. 6 is an SSF control unit and an SRF according to an embodiment of the present invention.
It is a flow chart which shows the operation procedure of a control part.

FIG. 7 is a diagram showing a system configuration of an intelligent network.

[Explanation of symbols]

 1 Service Control Point SCP 2 Service Switching Point SSP 3 Call Processor 4 Call Path Connection Module 5 PCM Link Control Device 6 No. 7 MTP Level 2 Control Device 20 IN Call Control Module 21 Event Reception Unit 22 SSF Control Unit 23 SRF Control Unit 24 MTP section 25 SCCP section 26 TCAP section 27 INAP control module 28 Terminal control module 29 Timing control module 210 Trunk 211 Subscriber line

Claims (7)

[Claims] 1. A special resource function control method in a switching network having an intelligent network function, comprising: a special resource function control SRF, a service control function SCF to a service switching function SSF, or a service control function SCF. A special resource function control method, characterized in that the terminal identification information on which the special resource function SRF acts is included as a parameter of all operations sent to the resource function SRF. 2. In one call using a plurality of terminals, by designating one terminal of the plurality of terminals, the service control function SCF gives a special resource to a service switching function SSF or a special resource function SRF. By sending the control operation of the function SRF, the special resource function SRF is supplied to other terminals under the condition independent of the one terminal.
2. The special resource function SRF is acted on an arbitrary plurality of terminals under an independent condition by causing the above action to be sequentially repeated for the remaining other terminals. Special resource function control method. 3. An IN call control module for an intelligent network for performing the method for controlling a special resource function SRF according to claim 1, wherein the IN call control module and another module are separated, and the IN call control is performed. The module includes an event reception unit that receives events from other modules, and a service exchange function S.
The SSF control unit for controlling the state of the SF and the SRF control unit for controlling the state of the special resource function SRF are provided, and the event reception unit and the SS for one call as call control information.
The information used by the F control unit is assigned only one unit, and the SR
The information used by the F control unit is assigned to n units (n is a plurality), and the special resource function SRF is made to act on n terminals at the same time for n kinds of independent conditions for one call. IN call control module. 4. A number is uniquely assigned to each unit of call control information used by the special resource function SRF, the number is used as an SRF number, and used by the event reception unit and the SSF control unit. 4. The IN call according to claim 3, wherein the call control information includes, as SRF connection information, information that manages the blockage of the unit corresponding to the SRF number and the terminal identification information on which the special resource function SRF operates. Control module. 5. When the special resource function SRF connection request operation is received, the event reception unit sends the information designated by the operation to the SSF control unit, and the SSF control unit refers to the SRF connection information. Then, the vacant SRF number is acquired, the SRF connection request is sent to the SRF control unit using the SRF number as a parameter, and then the vacancy block information corresponding to the SRF number is set to occluded. The IN call control module according to claim 4, characterized in that: 6. When receiving an operation that specifies a condition for transmitting / receiving information between the special resource function SRF and a terminal, the event receiving unit searches the SRF connection information using the terminal identification information included in the operation as a key. Then
Obtain the SRF number that matches the terminal identification information and
The RF number and the information designated by the operation are sent to the SRF control unit, and the SRF control unit stores the operation information in the unit area of the call control memory corresponding to the SRF number, and the special resource is designated under the designated condition. Function S
The IN call control module according to claim 4, wherein information is transmitted and received between the RF and the terminal. 7. When the disconnection request operation of the special resource function SRF is received, the event reception unit provides the information specified by the disconnection request operation to the SSF.
The SSF control unit searches the SRF connection information with the terminal identification information included in the disconnection request operation as a key, obtains the SRF number with which the terminal identification information matches, and sets the special resource function SRF as a parameter. 5. The IN call control module according to claim 4, wherein the SRF release request is sent to the SRF control unit, and then the empty / busy information corresponding to the SRF number is set to empty.