FI106506B - Decentralisation of services in an intelligent network - Google Patents

Description

1 106506 Distribution of Intelligent Network Services Field of the Invention

The invention relates to the decentralization of services in an intelligent network and the provision of control connections for service programs.

Technology background

The rapid development of the telecommunications sector has made it possible for operators to provide users with many different types of services. One of 10 such advanced service network architectures is called an intelligent network, commonly referred to as IN (Intelligent Network). Such services include, for example, a Virtual Private Network (VPN), which allows the use of short numbers between subscribers within a private network, and a Personal Number where the intelligent network re-routes calls to a personal number in a manner controlled by the subscriber.

The physical architecture of an intelligent network is illustrated in Figure 1, where physical entities are depicted as rectangles or cylinders, and functional entities within them are ovals. In the following, this architecture will be briefly described as the invention will be further described

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'· *: Referring to the intelligent network environment. An interested reader can get a deeper insight into the intelligent network, such as ITU-T Recommendations Q.121X or Bellcore's AIN-

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recommendations. The invention and its background will be described using the CorelNAP terminology of Recommendation ETS: Y: 300 374-1, but the invention may also be used in intelligent networks implemented in accordance with other intelligent network standards.

Subscriber Equipment SEs, which may be, for example, pu-Helin, mobile, computer or telefax, are connected either directly to the Service Switching Point (SSP) or to a network access point • ♦ *

to NAP (Network Access Point). The service switching point SSP provides 30 users with network access and performs all necessary dialing operations. SSP

• · · is also able to detect the need for an intelligent network service request. Functionally, the SSP includes call management, routing, and service selection functions.

. ···. The Service Control Point (SCP) includes the Service Logic Program (SLP) used to provide the 2 106506 intelligent network services. Service logic programs will also be referred to as the "service program".

The Service Data Point (SDP) is a database containing subscriber and intelligent network data used by SCP's service programs to provide personalized services. The SCP may access SDP services directly through a signaling or data network.

The Intelligent Peripheral IP provides advanced features such as announcements, voice and multiple dial recognition.

The signaling network shown in the figure is a network according to signaling system number 10 7 (SS7, Signaling System Number 7, is a known signaling system described in the CCITT (now ITU-T) Blue Book Specifications of Signaling System No. 7, Melbourne 1988).

The end user (subscriber) access to the network is provided by the Call Control Agent Function (CCAF). Access to the IN services will be implemented through additions to 15 existing digital exchanges. This is done by utilizing a common call state model BCSM (Basic Call State Model), which describes the different stages of call control and includes points, called Detection Points (DPs), where call control can be interrupted by an intelligent network service. to start lun. At these observation points, the intelligent network service logic entities \ '' 20 may interact with the basic call and connection management features. The center is divided into two call set-up • · v .: parts: the input side of the call set-up and the output side of the call set-up. Roughly describing the input-side call control is related to the A-subscriber service: Y bones and the output-side call control is related to the B-subscriber services. The corresponding

: T: 25 state models are O-BCSM (Originating Basic Call State Model) and T-BCSM

• (Terminating Basic Call State Model). The BCSM is a high-level state-of-the-art description of the functions of the Call Control Function (CCF) required to establish a connection path between users. and maintenance. Functionality is added to this state model by means of the Service Switching Function (SSF) (cf. CCF and • · · SSF overlaps in Figure 1) to decide when. call intelligent network services (or IN services). When these IN services are # · ·, ··. called, takes care of the service control function • · SCF (Service Control Function) containing intelligent network service logic. The service switching function SSF thus associates the call control function 3 106506 CCF with the service control function SCF and allows the service control function SCF to control the call control CCF.

The intelligent network service is produced such that, when encountering service-related observer points, the service switching point SSP requests instructions from the service control point SCP by means of messages transmitted over the SSP / SCP interface. In intelligent network terminology, these messages are called operations. For example, the SCF may request that the SSF / CCF perform certain call or connection operations, such as billing or routing. The SCF can also send requests to the Service Data Function (SDF), which provides access to service-related data and network information in the intelligent network. The SCF may, for example, request the SDF to retrieve or update information about a particular service.

The functions described above are further complemented by the Specialized Resources Function (SRF), which provides an interface for the mes-15 network mechanisms associated with the subscriber. Examples include communications to subscribers and collection of subscriber selection.

In the following, the role of the functional entities shown in Figure 1 with respect to IN services will be briefly described. The CCAF receives the calling • a V 20 of the service request party, which typically consists of the earpiece V ·; calling the extraction and / or a particular party series of digits dialed.

: Y: CCAF forwards the service request to CCF / SSF for processing.

The call control function CCF has no service information but is programmed «Il; y. identify the observation points where a SCP visit may be required.

25 The CCF pauses the call setup and notifies the service switching function SSF of the encountered detection point (call setup phase). The function of the SSF is to interpret, using predetermined criteria, whether a service request related to the intelligent network services is to be made. If so, the SSF sends a standardized IN service request to the SCF containing 30 call related information. The SCF receives the request and decodes it. It will then work with SSF / CCF, SRF, and SDF to provide the requested Il service to the end user.

Y. ' As stated above, the service provisioning is initiated by the * «* ··· 'SSF sending a standard IN service request to the SCF. The service request 35 may be transmitted at certain stages of call setup. FIG. 2 106506 illustrates the operation of a prior art intelligent network at observation points in light of a few basic operations. In step 21, the SSP sends an SCI request for an InitialDP service, which contains basic call information for initiating the intelligent network service. This is followed by arming of detection points in the SSP. In step 22, the SCP sends the RequestReportBCSMEvent operation to the SSP, which tells the SSP which encounters of the observation points it must report to the SCP. Next, at step 23, the SCP typically sends charging and / or interaction operations, such as Ap-plyCharging (for example, a billing report request) or PlayAnnouncement 10 (provide the intelligent network-related communication to the subscriber). In step 24, the SCP sends a routing instruction to the SSP, such as Connect (route the call to a new number) or Continue (continue with call setup with the same information). When the SCP encounters a detection point, the SSP sends an EventReportBCSM operation to the SCP at step 26.

15 Observation points defined in intelligent network architectures are the primary mechanism for reporting various events. The events 21-24 of Figure 2 described above relate to an observation point called the Trigger Detection Point (TDP). The SSP may make an initial inquiry to the SCP in connection with such a TDP discovery point and receives instructions to establish a call. Another type of observation points is the so-called.

• Event Detection Point (EDP). Paragraph 26 of Figure 2 illustrates the point at which such an EDP detection point is encountered during speech formation. The SSP reports the encounter point encounter to the SCP, which at 28 transmits

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for more call setup instructions. The EDP-R (Event Detection Point Re- • sponse Required) is a detection point after which a call processing at the switching point is stopped until the SCP sends additional instructions. The tuning of the EDP-R observation points results in a so-called. controlling over. . control relationship between the SSP and a specific SCP utility.

• · · *; [· * A controlling connection means that a session is in progress between the call set-up half and the SCF • * · '·] * 30, and the SCF can provide call modifying instructions in this session. In a monitoring context, the SCP cannot · ♦ ·· affect the progress of the call set-up, but can only request the · »» SSP to report various call set-up events.

• · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · The problem with EDP-R observation points is that they prevent the provision of additional services. It is particularly problematic if one service program reserves a controlling connection for the duration of the call by tuning the endpoint encountered at the end of the call to the EDP-R observation point, whereby other intelligent network services cannot be accessed. 5 calls will no longer trigger. The operation of the intelligent network is thus based on the fact that only one service program (SCP connection) at a time can be controlling and thus control the SSP.

It is advantageous for the tasks of the intelligent network services to be logically distributed, for example according to their task type, to separate service programs in one or more SCPs, for example for load reasons. GB-2315639 discloses a method for implementing distributed service control. When the first control point SCP1 detects that at least part of the service should be handled by the second control point SCP2, SCP1 sends a message to the switching point SSP, which accurately instructs it to send a request for service 15 to SCP2. This tutorial comprises a network address for another control point SCP2 to which control is to be transferred. The connection between SSP and SCP1 ends and a new connection between SSP and SCP2 is established when the SSP sends a service request to SCP2. The release method requires that each SCP is aware of the services of other control points and is thus able to route 20 SSP service requests to the correct address. The problem with the publication according to the publication is thus the availability of this information, especially in the sharing of control points between different service providers. In addition, the problem with prior art solutions is that only one service program at a time can provide a ««; * · ·. provide instructions for the connection point.

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BRIEF SUMMARY OF THE INVENTION It is an object of the present invention to provide a flexible service. . software distribution in the intelligent network and versatile use of service programs * · ♦ at the same time.

v: 30 These objects are achieved by the method of the invention, which is characterized by what is stated in the independent claim - · · · ·. Various embodiments of the invention are set forth in the dependent claims.

The invention is based on the idea that the controllability 35 of a connection is subdivided by classifying different degrees of control so called. control-106506 classes, each of which preferably has a single point of control. The control class defines a set of instructions from the service program that can be accepted by the switching point at this control level. Thus, the controllability of connections is based on partial functionality. In this way, simultaneous control of multiple service programs is allowed, i.e., permission to provide call set-up instructions to the switching point, as long as the instructions belong to different control classes. Thus, service programs belonging to different control classes can simultaneously control the operation of the switching point by means determined by their own control class. The service programs reserve control classes for the va-10 shirt according to their control needs from the available control classes indicated by the switching point. The control division is internal to the state model (O-BCSM or T-BCSM).

The advantage of decentralizing the control of the switching point is that it enables a wide range of intelligent network services to be launched. The switching point-15 can be controlled from several service programs of different control classes simultaneously.

A further advantage of decentralizing the service according to the invention is that it enables versatile service combinations.

An advantage of the method according to the invention is that service programs 20 can be distributed more freely without loss of functionality.

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BRIEF DESCRIPTION OF THE FIGURES The invention will now be described in further detail with reference to the preferred embodiments, with reference to the examples of Figures 3-8 in the accompanying drawings, in which: Figure 1 shows the essential parts of the intelligent network structure for the invention; . . Figure 2 illustrates the operation of a prior art intelligent network at observation points in the light of a few basic operations; Figure 3 shows an intelligent network structure illustrating the control connections according to the invention; Fig. 4 shows an intelligent network structure in which the switching point is controlled by the control points of a plurality of service providers according to the invention; Fig. 5 shows a flow diagram of an embodiment of the method according to the invention I »» • »* ·· * 35; 106506 Fig. 6 illustrates network operations of a smart network according to the invention at a few observation points; FIG. 7 illustrates as a network operation the release of a control class reservation initiated by a service program; and FIG. 8 illustrates as network operations the discharge of a control class charge triggered by a switching point.

DETAILED DESCRIPTION OF THE INVENTION

The invention will now be described in more detail with reference to Figure 3, which illustrates an intelligent network structure according to the invention. In the example of Figure 3, the intelligent network services are distributed to a plurality of service programs SLP1, SLP2 and SLP3, which are physically located at two control points SCP1 and SCP2. A control connection to the switching point SSP O-BCSM or T-BCSM mode model is established for each of the service programs shown in the figure, according to the present invention divided into control classes. For example, service program SLP1 can be instructed in control class C1, service program SLP2 in control class C2, and service program SLP3 in control class C3. The various classes of control may be, for example, Charging control, Con-20 nection control, and User interaction control, for example, reporting or subscriber selection. The service program can only give instructions to a switching point on matters within its own control class: Y:

Figure 4 illustrates an intelligent network structure in which the switching point is controlled by the control elements of a plurality of service providers 1-3, which are the control points SCP shown in the figure and an ext device. The figure shows the lines of the present. . SCP / ext device - SSP connections according to the invention which control the call set-up of the switching point within each of its own control class • · · Y * 30. Thus, the service programs of different service providers can control the switching point ··· simultaneously. Although the invention will be described in the following mainly by means of SCP connections, the method according to the invention may be used with other types of control-requiring connections between the switching point and the mechanism implementing the SCP-like functionality, i.e. * · * 35 is creating something in a service package.

106506 Such a mechanism providing an intelligent network service may be physically located either within or physically separate from the exchange comprising the switching point.

In the following, the invention will be illustrated in the light of an exemplary case with reference to the flow chart of Figure 5. In the example of Figure 5, call 5 uses three separate intelligent network service programs, service programs A, B, and C.

The function of the service program A is a subscriber-specific calling subscriber availability service, where an attempt can be made to connect to the next number on the availability list if the calling subscriber's selected number 10 is not answered or otherwise the routing fails. In addition, in the A service, the calling subscriber may be a member of the Virtual Private Network Speed Dialing Service, so the calling subscriber can also add numbers to the availability list as a VPN group speed dial. The control class required by the service program A according to the invention is a routing control and is required during the call setup phase.

The function of the service program B is a subscriber-specific PrePaid service in which a subscriber is allocated a certain number of computation pulses or time in the SCP database to the subscriber in question. subscriber calls total available. If the counting pulse or time used by the subscriber in the call expires, the call will be banned. The control class required by the service B according to the invention is: '',: control of the calculation and is necessary for the duration of the call.

: ',! The function of the service program C is the so-called. an advertisement call, i.e. the subscriber is called at intervals during the call by advertisements with an IN communication. Service C. ···. needs control at least during the call phase and possibly also, v. 25 during the formation step. Service C in accordance with the invention of Service C · · · M is an interaction control.

Using the control class defined in the example case according to the invention, it is possible for services A, B and C to simultaneously control the switching point SSP within the limits defined by its own control class 30. In Fig. 5, point 50 divides the controllability of the • j * connection into the control classes according to the invention, here ··· «. ···. in the example, computation control, gateway control, and interaction control. The functionality of step 50 is not performed separately for each call * · * *, but typically the handoff is performed once, after which the control classes of the handoff are available for call setups. When service program A is started, for example in connection with a service request, information about the available control classes is transmitted from the switching point to service program A (step 51). This information may be provided in the form of a list of reserved control classes or control availability still available. In the example case of Figure 5 5, in step 51, the service program A is informed that all control classes, i.e., compute control, routing control and interaction control, are still available. Information about the free control classes is provided to the service program, for example, in connection with a prior art intelligent network operation. At step 52, service program A reserves a bus-10 access control. Information on the allocation of this control class may be notified to the switching point, for example, by attaching this information to an operation to be transmitted to the switching point, or the switching point itself can deduce the gateway control booked by the service program based on the received operations. At the same time, service program A provides instructions for bus-15 (step 53).

When service program B is started, step 54 informs the switching point B of information on free control classes, as described above in connection with the description of step 51. In the example of Figure 5, there are 20 free control classes at this point in the count control and interaction control. Utility • V B reserves the use of the control control class for computation and informs it of: \ i the switching point, for example, by attaching information to a switching point in the operation: Y:

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for instructions (step 55). At the same time, the switching point receives instructions from service program B.% ·. 25 relating to control of counting (paragraph 56).

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Further, when starting the service program C, in step 57, the switching point is informed to the service program C that control. . Of the classes, only interaction control is available. Service program C reserves the last available control class and informs it about the 30 field points, for example, by assigning information to one of the switch points in the intermediate operation or by providing interaction instructions (step 58). At the same time ·· «·. . ···. service program C provides interaction instructions (paragraph 59).

Service programs A, B and C can be started in any order * * · '. For example, service program B could start at OriginatingAttemptAuthorized, service program A at observation 106506, InfoCollected, and service program C at observation 0-Answer. Using control classes, it is also possible to implement multiple services at the same observation point. For example, if Service B starts at OriginatingAttemptAuthorized, Service A 5 can be started at the same Observation Point after launching Service B. In this case, control is transferred from the SSF to its CCF only after both services B and A have started and issued their call set-up instruction at the OriginatingAttemptAuthorized observer. The service control according to the invention reserved for the service is released as a central control according to prior art 10.

Figure 6 illustrates as network operations the functionality described above at a few detection points of an intelligent network according to the invention. In step 61, service program B is started by sending a service request to InitialDP. According to the invention, information about free control liveability classes is attached to this operation, for example, as an indication that no control liveability class is reserved. At step 62, SCP1 sends a prior art ApplyCharging operation to SSP. At step 63, the SCP1 sends the SSP a Continue operation, which, in accordance with the invention, is assigned information for a calculation control control class assignment. At step 64, the switch-20 point SSP starts the service program A by sending SCP2 an InitialDP operation, which according to the invention is associated with information about the free: * \ i control classes, for example, indicating that the control of the computation is «<: Yj. At step 65, SCP2 sends SSP a state-of-the-art Con-. * ··. nect operation, after which SSP concludes that service program A is .v. 25 has reserved access to the routing control because it provides guidance on the level of • • · leniency in this control class. In step 66, the SSP starts the service program C by sending a service request InitialDP to SCP1, which is # associated with information about the available control classes, for example, by announcing that the calculation control and the routing control are busy. . At 67 v: 30, SCP1 sends SSP a state-of-the-art PlayAnnouncement operation. At step 68, SCP1 sends the SSP a Continue operation to which ··· ». ···. in accordance with the invention, is attached information for reserving an interaction control-control class for use by service program C.

* · * * In one embodiment of the invention, in addition to the allocation of the control classes described above, the service programs and / or the switching point may also initiate the change of the allocation of the control classes. In the following, this functionality will be described in the exemplary case of deploying a routing control by means of Figures 7 and 8. At point 71 of Figure 7, the switching point transmits a service request to InitialDP, which has information associated with free control classes in accordance with the invention. At step 72, the SCP sends a prior art requestReportBCSMEvent operation to the SSP where the SCP allocates an observation point DP3 for control. At step 73, the SCP sends a SSP operation to the SSP, which, in accordance with the invention, is assigned information on allocating a routing control-control class. In observation point 10 at DP3 at 74, the SSP sends a prior art EventReportBCSM operation to the SCP. To change the control class allocation, the SCP transmits to the SSP in step 75 an UpdateCont-rolClass operation according to the invention, which transmits to the SSP that the SCP wants to release its control of the bus. The SSP releases the routing control reserve 15. Alternatively, the control class release information may be transmitted to the SSP in association with the prior art operation, or the SSP may deduce the control class release from the received prior art operations, for example, when the EDP-R observation points are no longer busy. At step 76, the SCP sends the SSP a Continue operation according to prior art 20. Next, the SSP sends to another (4 «\> SCP or some other mechanism that implements the functionality of the SCP: \ j a service request to InitialDP, which has information about the free Y controls according to the invention added (step 77).

the leanness classes also include the leanness class that the SCP controls

.V. 25 above gave up. In step 78, the mechanism implementing the SCP functionality sends a SSP operation to the SSP, which is assigned a * · · information on the allocation of the routing control-control class in accordance with the invention.

Similarly, the control class change can be performed if the SCP wants to extend its control. In this case, preferential arrangements are made for SSP. · 30 times the ability to reject a control class change.

··· The positions 81-83 in Figure 8 correspond to the above described in Figure 7 ····. . ···. 71-73, wherein, according to the invention, the routing control is reserved for use by the SCP. In FIG. 8, at 84, the SSP transmits a prior art EventBCSM operation. At step 85, the SSP transmits to the SCP an UpdateControlClass operation according to the invention, which transmits to the SCP that the 12 106506 SSP is releasing the routing control assignment. Alternatively, the information on controlling the de-escalation class can be transmitted to the SCP in association with some prior art operation. Such de-escalation of the control class is necessary, for example, when the SSP notices that the call has changed to a priority call, e.g., an emergency call, and no longer allows the SCP to control call set-up. In this case, the SSP will no longer accept routing instructions sent by SCP after the reservation has been cleared.

Another embodiment of the invention will now be described with reference to Figure 9. At point 91 of FIG. 9, the SSP sends SCP1 an InitialDP-10 service request to which information about reserved control classes is assigned in accordance with the invention, and more particularly, to which service control point and service program each control class is reserved. Upon receipt of the service request, SCP1 discovers that some of the service requires a degree of control that is already reserved by a service program in another SCP, such as 15 SCP2. Then, at step 92, SCP1 sends directly to the service program of the second SCP in question a request for further service in accordance with the invention, in which SCP1 requests a second control portion of the service. SCP1 sends instructions to the SSP on the service portion under its control authority (step 93) and SCP2 sends instructions to the SSP on the service portion under its own control authority (paragraph 94). Above: * ·]: The functionality described above is made possible by the information passed to the SCP on the reservation holders of other control classes, preferably the SCP address and the service provider «*: *; '. jelman address.

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···, Similarly, the SCP may send another service to the SCP .v. 25 requests when the whole service needs a control class that is # # · reserved for another SCP service program. The SCP may also send · * * multiple follow-up service requests to different SCPs when the control classes required by the service are reserved for service programs of other SCPs.

The above-mentioned control class charge paths according to the invention are preferably stored in conjunction with the switching point SSP. The data is preferably stored in the form of an SCP address and a service program address.

. ···. The drawings and the description related thereto are only intended to illustrate the idea of the invention. The details of service decentralization according to the invention may vary within the scope of the claims. Although the inventions described above are primarily by SCP connections, method 106506 13 can be used for other types of connections between the switching point and the control element implementing SCP-like functionality. The data to be transmitted in the method of the invention may also be transmitted in conjunction with operations other than those described above, and other than at observation points, for example, coupled to prior art spontaneous messages such as ReleaseCall or Cancel.

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Claims (16)

106506 A method for decentralizing services in an intelligent network comprising at least one switching point (SSP) and at least one control element (SCP, EXT DEVICE) having a plurality of service programs (SLP), the method of establishing and controlling a switching point (SSP) during call setup. between the instruction service program (SLP), characterized in that the method allocates connection controllability to control classes, allocating to the switching point (SSP) service program (SLP) 10 at least one control class so that each control class is reserved for only one service program at a time, limited by the control powers of the control class. A method according to claim 1, characterized by transmitting from the switching point (SSP) to the service program (SLP) information on the free control classes that are available from the switching point (SSP) and indicating the controlling class allocated by the service program to the switching point (SSP). 3. A method according to claim 2, characterized by: indicating the reserved control class with information associated with the operation of the intelligent network. Method according to claim 1 or 2, characterized in that a control class assigned by the service program (SLP) to determine at the switching point (SSP) is deduced based on the instruction given by the service program. « 4. Förfarande enligt patentkrav 1 eller 2, kännetecknat av att: .v 25 den control class som tjänsteprogramme (SLP) har reserverat bestäms i · 1 kopplingspunkten (SSP) main basis av en instructing frän tjänsteprogramme. 5. Förfarande enligt patentkrav 1, kännetecknat av att control-: T: klassreserveringen ändras vid behov. 1 · 1; 6. Förfarande enligt patentkrav 5, C h e n g e n t e r t a r a t i o n 30 A control class reservation is provided by the Gäng frän kopplingspunkten (SSP). • · · Method according to claim 1, characterized in that the control class charge is changed as needed. * · · The method according to claim 5, characterized in that: • · · • · · *. 30 to initiate the change of control class charge from the switching point (SSP). 7. Förfarande enligt patentkrav 5, kännetecknat av att ändringen • · av Control Class Reservation Scheme (SLP). 2 2 Förfarande enligt patentkrav 6 eller 7, kännetecknat av att • ·: 1 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 106506 A method according to claim 5, characterized in that a change of control class allocation is initiated from the service program (SLP). • · 15 106506 Method according to claim 6 or 7, characterized in that the change in the control class charge is reported by a separate operation. 9. Förfarande enligt patentkrav 6 eller 7, kännetecknat avändring av control classreserveringen meddelas med hjälp av information som fogats account en operation som det intelligenta nätet utför. Method according to claim 6 or 7, characterized in that the change in the control class allocation is reported with the information associated with the operation of the intelligent network. 10. Förfarande enligt patentkrav 7, Kännetecknat was opened by the Kopp-5 lingspunkten (SSP) dras den slutsatsen att control class reservation service on the basis of an en instruction manual program. Method according to claim 7, characterized in that the change of control class charge at the switching point (SSP) is determined based on the instruction given by the service program. 11. Förfarande enligt patentkrav 1 eller 2, kännetecknat av att information förmedlas framgär de övriga tjänsteprogrammens controlclasser fran copplingspunkten (SSP) account tjänsteprogrammet (SLP) och 10 uppgifter som omfattas av styrbefogenheterna för ettst direct account detta andra affiliate program. Method according to claim 1 or 2, characterized by transmitting from the switching point (SSP) to the service program (SLP) information on the control classes of other service programs and directing the tasks falling under the control authority of the control class of another service program directly from the service program (SLP). 12. Förfarande enligt patentkrav 1 eller 2, kännetecknat av att i samband med kopplingspunkten (SSP) in the information section of the control class. A method according to claim 1 or 2, characterized by storing information on the allocations of control classes in connection with the switching point (SSP). 13. Förfarande enligt patentkrav 12, kännetecknat av att i informationen om control classreserveringarna ingyryrementement adress and tjänsteprogrammets adress. 13. The method of claim 12, characterized in that: The information about the allocations of control classes comprises the address of the control element and the address of the service program. v .: 14. The method of claim 1, characterized in that, when call set-up is discontinued, call set-up is controlled from 25 multiple service programs at the same observing point before the call set-up is continued. 14. Förfarande enligt patentkrav 1, kännetecknat avatt samtals-iVf 20 etableringen, dä den avbryts, styrs fran flera tjänsteprogram i samma obser- * i vationsunkt innan samtalsetableringen fortsätts. '; '; 15. Förfarande enligt patentkrav 2, k n e t e c k n a t av att för för- f I <1; '; 1 medling av den information framgär flash control class in a business team en list covert control class in a frank kopplingspunkten \ v 25 (SSP) account affiliate program (SLP). A method according to claim 2, characterized in that, for transmitting information about the free control classes, M sends a list of 30 roast control classes from the switching point (SSP) to the service program (SLP). The method according to claim 2, characterized by ···· 'transmitting from the switching point (SSP) to the service program (SLP) a list of reserved control classes for transmitting information about the free control classes. 106506 I.Förfarande för decentralization av tjänster vid et Intelligent nät somstefeldar ätminstone en kopplingsunkt (SSP) och ätminstone et sty-relement (SCP, EXT DEVICE) med flera tjänsteprogram (SLP), vid flashes 5 förfarande vid samtalsetablering uppkopplas en controlerande förbindelse mellan kopplingspunkten (SSP) och det tjänsteprogram (SLP) som ger in-struktioner at denna, knetnetkn av av vid förfarandet förbindelekontrollen indel i control classer 10 styr kopplingspunkten (SSP) maintains a respectable control class reserveras för self-control program at gangen, styrs samtalsetableringen frän tjänsteprogrammet inom ramen för den ätminstone ena därför reserveerade control class styrbefogenheter. 15 2. Förfarande enligt patentkrav 1, kännetecknat av att för reser vering av en control class förmedlas information backing up the control class with the led frän kopplingspunkten (SSP) account tjänsteprogrammet (SLP) och meddelas frän tjänsteprogrammet (SLP) account kopplingspunk. ·, ·. 20 blinking control class har reserveerat. • t V. 3. Förfarande enligt patentkrav 2, kännetecknat av den control; ,: class som har reserverats meddelas med hjälp av information som fogas account «« en operation som det intelligenta nätet utför. • t 16. Förfarande enligt patentkrav 2, kännetecknat av att för för-medling av den information, framgär flick control clerk with business en list cache reserverade control clänger plplingspunk-ten (SSP) account link program (SLP). ·· ♦ · • 1 1 1 · • · • «« «* * * * * * * * *