MX2008007384A - Intelligent network services - Google Patents

Abstract

A method and control node (110) and computer program are disclosed for handling Intelligent Network services associated with a call to a subscriber of a mobile telecommunications network, the network comprising said c ontrol node (110), a HLR 5 (111) and one or more SCPs (121, 122, 123). Said control node (110) a) sends (101) to said HLR (111) one or more requests for routing information associated with said call;b) receives (102) from said HLR (111) service trigger elements associated with said services;c) uses said trigger elements for invoking (103) said services in said one ore more SCPs (121, 122, 123);and d) receives (104) from said one or more 10 SCPs (121, 122, 123) information related to said services associated with said trigger elements.

Description

INTELLIGENT NETWORK SERVICES FIELD OF THE INVENTION The invention relates to a method and control node for managing intelligent network services associated with a call to a subscriber of a mobile telecommunication network. BACKGROUND OF THE INVENTION Intelligent network services are well known in the state of the art of telecommunications networks such as GSM (Global System for Mobile Communication). The core component of the Central Network subsystem of a GSM network is the Mobile Services Switching Center (MSC). It acts as a PSTN or ISDN switching node and also provides all the functionality required to handle a mobile subscriber, such as registration, authentication, location update, transfers, and routing of calls to an itinerant subscriber. These services are provided in combination with several functional entities, which together make up the Central Network subsystem. A gateway MSC (GMSC) provides the connection to fixed networks (such as PSTN or ISDN). Signaling between functional entities in the Red Central subsystem uses the Signaling System Number 7 (SS7), used for truncal signaling in ISDN and widely used in current public networks. The Home Location Register (HLR) and the Visitor Location Register (VLR), in conjunction with the MSC, offer GSM call and roaming capabilities. The HLR contains all the administrative information of each subscriber registered in the corresponding GSM network, together with the current location of the mobile station. The location of the mobile station is typically in the form of the signaling address of the VLR associated with the mobile station. Logically there is an HLR per GSM network, although it can be implemented as a distributed database. The VLR contains administrative information selected from the HLR necessary for call control and supply of subscribed services, for each mobile station currently located in the geographic area controlled by the VLR and currently served by this VLR. Although each functional entity can be implemented as an independent unit, today all manufacturers of switching equipment implement the VLR with the MSC, so that the geographical area controlled by the MSC corresponds to the area controlled by the VLR. , thus simplifying the required signaling. The MSC does not contain information on particular mobile stations; this information is stored in the location records. Next, a typical incoming call setting (call terminating at the mobile station) in a GSM network is described. When a subscriber makes a call to a mobile phone, he dials the telephone number associated with the user of the telephone, which is known as the mobile station ISDN number (MSISDN), and the call is routed to the telephone operator gate MSC mobile. A gate is a node used to interconnect two networks. The gate is often implemented in an MSC, in which case the MSC is known as the GMSC. The GMSC acts as the "gateway" from outside portions of the public switched telephone network in the provider's network. As noted above, the phone can move freely anywhere in the operator's network or roaming partner networks, including in other countries. Therefore, the first job of the Compuerta MSC is to determine the current location of the mobile phone in order to connect the call. It does this by consulting the HLR which, in accordance with what is described above, knows which Visitor Location Register (VLR) is currently associated with the telephone, if it exists. When the HLR receives its request message, it determines whether the call should be routed to another number (known as a detour) or whether the call should be routed directly to the mobile station of the called subscriber. If the telephone owner has previously requested that all incoming calls be diverted to another number, said supplementary service is also known as Unconditional Call Forwarding (CFU) to a Forwarding Recipient Number (FTN), then this FTN is stored in the HLR. In this case, then the FTN is returned to the Gateway MSC for immediate routing to that destination. If the mobile station is not currently associated with a VLR (for example, if the telephone is switched off), then the HLR returns a number known as the call forwarding number not reachable (CFNRc) to the GMSC, and the call is transferred there . Many operators can automatically adjust this value to the phone's voicemail number so that callers can leave a message. Finally, if the HLR knows that the telephone is in the jurisdiction of a particular VLR, then it will request a temporary number, which is known as a mobile station roaming number (MSRN) from said VLR. This number is transferred to the GMSC that uses it to route the call to another MSC, which is known as the Visited MSC (VMSC). When the call is received by the VMSC, the MSRN is used to find the phone record in the VLR. This record identifies the location area of the phone. The search occurs on all mobile phone masts in this area. When the subscriber's mobile answers, the exact location of the mobile is returned to VMSC. The VMSC then sends the call to the appropriate cell phone mast and the telephone rings. If the subscriber responds, a voice path is created through the VMSC and GMSC back to the caller's network, and a normal telephone call follows. It is also possible that the phone call is not answered. If the subscriber is making another call (and the waiting call is not being used) then the VMSC routes the call to a certain number of call forwarding in case of busy (CFB). Similarly, if the subscriber does not answer the call after a lapse of time (typically 30 seconds), then the VMSC routes the call to a predetermined call forwarding number if it does not answer (CFNRy). Again, the operator may decide to set this default value to the mobile voice mail in such a way that callers can leave a message. An intelligent network (IN) is a network connected to a telecommunications network that allows operators to deploy operator-specific Value Added Services (VAS). The intelligence found in the commutator is increased by the intelligence coming from the Intelligent Network, which is found in computer nodes distributed throughout the network. This provides the network operator with the means to develop, deploy and control services more efficiently. New services can be quickly introduced into the telecommunications network. Once introduced, the services are easily adapted to the client to meet the individual needs of the clients. IN services are typically provided by a Service Control Point (SCP). An SCP is a control computer that communicates with other nodes and entities in the telecommunications network. The SCP comprises the service logic of one or more IN services and optionally IN service subscription data that allows the SCP to execute an IN service in accordance with the specific settings of a subscriber, that is, to adapt the execution of the service to the subscriber . When a call is established, the telecommunications network may request the SCP and require instructions to handle this call. For example, an SCP is consulted to provide the translation of the 800 number to an actual telephone number and bill the holder of the 800 number for the call. The SCPs can be physically separated from other components of the Intelligent Network or they can be combined with these two components in a single node.

In a GSM network, the subscription information of IN services is stored in the HLR. Two types of information are found in the HLR: (1) a static subscriber information and (2) a dynamic subscriber information. The latter is for example required to allow incoming calls to be routed to the mobile subscriber. The HLR stores, among other things: - the international mobile subscriber identity (IMSI); an internal subscriber identity used only by the network, - MSISDN number; - VLR address; - Subscriber data in supplementary services. IN services can be divided into two categories. A category includes services invoked by subscribers who initiate a call (Originated Call in Mobile Station -MOC). These services are known as origination services in mobile station (MO). Example of an MO service is the outgoing call filter. Each IN service subscriber is marked in its HLR with a CAMEL subscription information element of origination (O-CSI) that is used to identify a specific service in the SCP. The 0-CSI initiates the activation of the MOC service as soon as the subscriber initiates an MO call. In the previous example CAMEL is deployed, which means, by its abbreviations in English, "Improved Logic of Customized Applications for Mobile Networks". CAMEL was developed as a standard to extend IN telephone telephony services such as call waiting and forwarding calls to GSM mobile phones. The other category includes services that will be invoked by subscribers who receive a call (Terminated Call in Mobile Station-MTC). These services are known as terminated services in mobile station (MT). Examples of terminated mobile services are call forwarding services and Personal Greeting Service (PGS). PGS is a service associated with a roaming leg. PGS involves establishing a signaling connection between a GMSC and VMSC (what is known as a "Roaming leg") when a personalized greeting replaces the conventional alert tone ("Ring Tone"). As such, the personalized greeting is primarily related to the establishment of the roaming section; the ring tone is activated only when the roaming leg is set and the party receiving the call is alerted. Each subscriber of the IN service is marked on his HLR with a CAMEL Subscription Information flag of Termination (T-CSI) that is used to identify a specific service in the SCP. This initiates the activation of the MTC service during an attempt to call the subscriber.

According to the state of the art, a control node can request instructions to an HLR during an MTC operation to obtain instructions from the HLR. The control node can be a GMSC. In response to the request by the control node, the HLR can send an IN activation information for the incoming call. The activation information IN exchanges the HLR input and the control node has been standardized. For example, T-CSI is the GSM standardized IN activation information for incoming calls, in accordance with that specified by 3GPP (Third Generation Partnership Project) in 3GPP TS 29.002. The activation information of the IN includes, among other things, the address of the SCP where the IN service is located and the service key, which identifies a particular IN service within the SCP. The control node uses the activation information of In to invoke the IN service in the SCP in accordance with that specified for the subscriber in the IN activation information. In response to the service invocation, the SCP sends an instruction to the control node to follow, for example, the call settings or to terminate the call according to the result of the execution of the service. Current networks are typically arranged to handle a single invocation of an IN service for an MTC. Recent developments show, however, that there is a need to invoke two or more IN services during the handling of incoming calls. Patent Application WO 00/25528 discloses a Service Interactions Manager that is included in an SCP. The task of the Service Interactions Manager is to determine which of the services available in the SCP will be executed for a subscriber and invoke these services in a particular sequence. SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of device that overcomes the drawbacks of the state of the art by allowing subscribers to have more than one IN service for a call. In a first aspect of the invention, a method for managing Intelligent Network services associated with a call to a subscriber of a mobile telecommunication network is proposed., the network comprises a control node, a Location Register of Domestic Users and one or several Service Control Points, the method includes the steps of: a. said control node sends to said Home Location Register, one or several requests to route the information associated with said call; b. said control node receives from said User Location Registry service activation elements associated with said services; c. said control node uses said activation elements to invoke said services in said one or several Service Control Points; d. said control node receives from said one or several Service Control Points information related to said associated services by said activation elements. In this manner, multiple service activation elements can be handled for a subscriber subscribed to one or several IN services belonging to a subscriber call. The IN Services do not have to be aware of the existence of one or several other IN services in this control node for this call. In other words, a first service does not have to know if a second service will be invoked and vice versa. Since the services do not require knowledge about the possible invocation of other IN services for this call, the services can work on different platforms and can be supplied by different vendors. There are several embodiments of the invention. For example, the invention may cause a Home User Location Register to send a first service activation element of said multiple service activation elements, in response to a first request for routing information and a second service activation element. of said multiple service activation elements in response to a second request for routing information. The first request for routing information may comprise: - Subscriber's MSISDN number. The response to the first request for routing information may comprise: - the first service activation element. The second request for routing information may comprise: - Subscriber MSISDN number; - an indication that the HLR must delete the first service activation element in the response. This indication can be, for example, the "delete T-T-CSI" parameter. The response to the second request for routing information may comprise: an MSRN to be used for the call to the served subscriber; - the second service activation element; - a prefix or suffix for the subscriber's MSRN.

The MAP message may be sent from the HLR to a GMSC in multiple messages of Signaling Connection Control Part, due to MAP segmentation: A first service, for example, a prepaid charging service, is effected in a first point of service control and a second service, for example PGS, is performed in a second SCP. In this way, the prepaid service and PGS can be offered to the same subscriber; the prepaid service and PGS can work on different platforms and are not related to each other. When the present invention is used for PGS, the subscriber making the call can hear any call progress message even when an early call forwarding or a late call forwarding with optimal routing is being performed. Another advantage of the invention is that PGS can be offered to subscribers of Virtual Private Network (VPN). In a second aspect of the invention, a control node is proposed to handle Intelligent Network services associated with a call to a subscriber of a mobile telecommunication network, the network comprises said control node, an HLR and one or several SCPs; the control node is configured to send said HLR one or more requests for routing information associated with said call; the control node is further configured to receive from said HLR multiple service activation elements associated with said services, and to invoke said services in said one or several SCPs through the use of said activation elements; the control node is further configured to receive from said one or more SCPs information related to said services associated with said activation elements. In a preferred embodiment, the control node comprises a GMSC. The control node can, however, also comprise a device such as an MSC or a CSP. A third aspect of the present invention proposes a computer program comprising program instructions for making a computer perform the method according to the invention. The computer program may be stored in a medium and may comprise executable computer instructions to cause a computer to perform the method according to the invention. The computer program support may be a recording medium, a computer memory, a read-only memory, or an electrical carrier signal. The present invention proposes that multiple IN services can be provided for a particular type of subscriber call. An HLR may have registered multiple indications of subscriptions of particular type of IN call (hereinafter referred to as IN activation elements).

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram of a prior art configuration of devices in a mobile telecommunication network. Figure 2 is a signaling diagram of the method and devices in accordance with the present invention. Figure 3 is a block diagram of devices in accordance with the present invention. Figure 4 is a signaling diagram of one embodiment of the method of the present invention. Figure 5 is a signaling diagram of one embodiment of the method of the present invention. Figure 6 is a signaling diagram of one embodiment of the method of the present invention. DETAILED DESCRIPTION OF THE INVENTION For the purpose of the present invention, the handling of an MT call in the GMSC can be divided into two logical parts: (1) Incoming call handling; (2) Handling of roaming section. Incoming call handling includes the recovery of T-CSI from the HLR and the invocation of the first CAMEL service. The first CAMEL service can perform call restriction or can apply call forwarding. Typically, the first CAMEL service is also used for incoming call mode, in the case in which the called subscriber is in roaming condition. The HLR can also return other IN activation elements in combination with T-CSI. The handling of the roaming leg includes the recovery of the HLR MSRN and the routing of the call from the GMSC to the terminating MSC where the called party is registered at this time. It will be noted that the "roaming section" is also applicable in the case in which the subscriber is in the Public Visible Land Mobile Network (VPLMN) and in the case in which the subscriber is in the Public Land Mobile Network of address (HPLMN). That is, "roaming" in this case will not be associated with "being in another network or in another country". The present invention proposes that the invocation of two IN services for an MT call be made along the line of distinction described above. According to the present invention, two types of IN services can be defined for MT call: (1) IN services which require control over the MT call and which may require the ability to influence the routing of the call. These types of IN services must also know the location of the destination subscriber in order to apply the charge. (2) IN services that are required only for the roaming leg to the destination subscriber. This type of IN service is invoked only when a roaming leg is established, ie the GMSC has received an MSRN from the HLR. If the HLR returns a Forwarding Recipient Number (FTN) instead of an MSRN, then there will not be a roaming leg and therefore a service will not be invoked.

IN associated with roaming section. Figure 1 is a block diagram of a prior art configuration of devices in a mobile telecommunication network. The entities shown belong, at least conceptually, to an intelligent network that is distinct from the mobile communication network. The intelligent network includes HLR 111, SCP1 121, SCP2 122 and GMSC110. GMSC 110 is connected to SCP1 and SCP2 as well as to HLR 111 to perform well-known IN activation functions. SCP1 and SCP2 contain intelligent network services that can be invoked sequentially during the handling of a mobile incoming call. Figure 2 is a signaling diagram of the method and device according to the present invention with a general perspective of the relationships between various elements.

The method comprises the following steps: Step 101 A control node 110 sends one or more routing requests associated with said call to an HLR 111; Step 102 The HLR 111 sends said control node 110 multiple service activation elements associated with said services; Step 103 The control node 110 uses said activation elements to invoke one or several services in one or more Service Control Points 121, 122, 123; Step 104 The one or more Service Control Points 121, 122, 123 sends to said control node 110 information related to one or more services associated with said activation elements. Figure 3 is a block diagram of devices and their interrelationships in accordance with the present invention. The line between the blocks (devices) represents communication path. HLR 111 can communicate with GMSC 110 and with VMSC 112. GMSC can communicate with SCP1 121 and other SCPs (SCPn) 122 subsequently invoked. GMSC 110 can communicate with VMSC 112. Figure 4 is a signaling diagram of an embodiment of the method of the present invention comprising a communication sequence between the devices as shown in Figure 3, comprising GMSC 100, HLR 112, multiple SCPs 121, 122 and a VMSC 112. In this example, a subscriber is subscribed to a CAMEL service and in addition to at least one service, which may be an IN service. For this example, only communication with two SCPs 121, 122 is shown for a third SCP etc. It occurs in the following steps: Step 401 The ISUP Initial Address Message (IAM) arrives at message GMSC 110; GMSC 110 analyzes the Number of the Party Receiving the Call in IUP from ISUP and deduces that the Number of the Party Receiving the Call is an MSISDN that belongs to your own network.

Step 402 The GMSC 110 sends the Send Routing Information (SRI) from MAP to the HLR 111. The GMSC 110 indicates the MAP SRI that CAMEL supports. Step 403 The called subscriber has a subscription with a CAMEL service for MT call handling. As a result, HLR 111 sends MAP-Res SRI to GMSC 110, including IN activation information for MT calls, T-CSI. Step 404 The GMSC 110 uses T-CSI to invoke a CAMEL service. The GMSC 110 instantiates an Internal GSM Service Switching Function (gsmSSF) entity; the gsmSSF sends Initial Detection Point (IDP) of CAP to the SCP. The address of SCP1 121, and the other data related to this IN dialogue, is obtained from T-CSI. The gsmSSF function collaborates with GMSC. Based on the information defined in the user subscription, and sent from the HLR to the GMSC, they establish service activators within GMSC and gsmSSF. These triggers are used to dictate when gsmSSF can communicate with gsmSCF. This will in turn determine how IN-based services are managed. Step 405 SCP1 121 responds with Continue CAP (CUE), to inform GMSC 110 that the MT call handling can continue, that is, the call can be delivered to the subscriber to whom the call is made. The control dialogue between SCP1 121 and GMSC 110 can be retained. The CAMEL service in SCP1 121 does not have to know about other IN services that the CAMEL service is currently performing. Step 406 The GMSC 110 sends a second inquiry to the HLR 111, that is, sends a second MAP SRI to the HLR 111. The second MAP SRI includes the flag "suppress T-CSI". Step 407 The HLR 111 recognizes the MAP SRI as a second SRI, by virtue of the presence of "suppress T-CSI", and responds by sending Provide MAP Roaming Number (PRN) to VMSC 112 where the party receiving the call is currently registered. Step 408 The VMSC 112 assigns an MSRN for this call and returns the MSRN to the HLR 111, sending MAP PRN-Res to the HLR 111. Step 409 The HLR 111 forwards the MSRN to the GMSC 110, by sending SRI Response (SRI) -Res) from MAP to GMSC 110. The subscriber receiving the call subscribes to a second IN service for MT call handling. The second In service is of the roaming section handling type, in accordance with that described in a prior part of the disclosure of the present invention. The HLR 111 includes the IN activation information associated with this second IN service, in MAP SRI-Res. For the purpose of the present invention, this second activation information of In is referred to as "RICK" (Roaming Feature IN Category Key). RICK can have a structure of T-CSI or TICK (Key of Category IN of Termination). In order to receive RICK, the GMSC 110 must have indicated in the second MAP SRI (step 6) that it supports this information element, that is, that it supports RICK. This indication of "RICK support" is similar to the indication of "TICK support". The "TICK support" that is sent from the GMSC of HLR, indicates to HLR that it supports the TICK: The TICK has a functionality that can be compared with T-CSI; however, TICK is not standardized. Step 410 The GMSC 110 recognizes that the MSRN is accompanied by a RICK. The RICK serves as an indication to the GMSC 110 that the roaming leg must be submitted to an IN service. The GMSC 110 therefore uses RICK to indicate an IN service, by sending CAP IDP to SCPn 122. The address of SCPn 122, and other data related to this In's dialogue, is obtained from RICK. Pass 411 The SCPn 122 responds with CAP CUE, to inform the GMSC 1100 that the MT call handling can continue, that is, the roaming section can be established towards the subscriber to whom a call is made. Step 412 The GMSC 110 establishes the roaming section to the subscriber to whom a call is made, by sending ISUP IAM to the destination exchange. ISUP IAM contains the MSRN that was received from HLR 111. Steps 401-408 represent normal call handling GSM. Step 409 represents an improvement of the existing MT call handling. The HLR 111 will normally only return the MSRN to the GMSC 110. Step 409 adds the RICK to the MAP SRI-Res. Step 410 and step 411 do not exist in the existing handling of the roaming leg. These steps represent the invocation of the second IN service for the MT call handling in the GMSC 110. When a call is delivered to the called subscriber, the two IN services can remain active. The first IN service, activated as a result of sending T-CSI to GMSC 110, can remain active throughout the call and has the total capacity available as allowed by the IN protocol used for this service. The second IN service, activated as a result of sending RICK to GMSC 110, also remains active throughout the call. This IN service however must use the IN capability with certain restrictions. As an example, this service can not apply call forwarding, since this would affect a prepaid service for the call. The present invention can be applied to several types of GSM call forwarding. This can be shown more adequately by considering a Personal Greeting Service (PGS) type service, for example. In the case of call forwarding, the destination of the call changes. Some operators require that the PGS service be terminated when a call is forwarded to a voice mailbox. With regard to the termination of a PGS service in a call forwarding situation, there are basically two types of call forwarding: early call forwarding (ECF) and late call forwarding (LCF). When a call forwarding is made early in the GMSC 110, the GMSC 110 does not receive an MSRN from the HLR 11 for this call and a roaming leg is not established. The GMSC 110 will not establish a roaming leg to the party receiving the call and as a result no roaming leg IN service will be invoked. In the case of early call forwarding, the HLR 111 does not return an MSRN in the second SRI Result and, in accordance with the present invention, does not return the RICK. The GMSC 110 now forwards the call to forwarded to destination, which may be, for example, a voicemail or a call termination service. Since the HLR 111 has not returned RICK, there will be no PGS invocation. The subscriber making the call can now hear any announcement produced by the voice mail, even though the voice mailbox differs the generation of the ISUP Response Message (ISUP ANM) during a defined lapse. When a late call forwarding is performed on the VMSC 112, then an optimal Late Call Forwarding Route (ORLCF) may be applied to return the handling of the call to the GMSC 110. The GMSC 110 terminates the roaming leg and therefore , the itinerary segment IN service will be finished as well. In the case of late call forwarding, the call is already routed to the destination MSC of the subscriber to whom the call is made. When a late call forwarding condition occurs, VMSC 112 can send Resume Call Handling (RCH) from MAP to GMSC 110; MAP RCH sending is part of ORLCF. When the GMSC 110 receives RCH MAP and approves the ORLCF request, it releases the roaming leg and creates a forwarded segment. The party making the call can hear any announcement generated by the one forwarded to the destination. Some operators deploy a voicemail system where the initial announcement is free. This can be achieved by having the voice mailbox differ from the generation of the ISUP ANM. If PGS remains active in a situation of this type, then the party making the call will not hear any announcement between Direct ISUP Complete Message (ACM) and ISUP ANM. The reason is that the personal congratulation remains active until the ISUP ANM detection. The initial announcement of the voicemail would not be heard in this case. The present invention solves this problem since PGS will be terminated in the case of late call forwarding in combination with ORLCF. If the late call forwarding is not subject to ORLCF, then the roaming section service can monitor the ISUP messages such as Call Progress (CPG) and ACM.

These ISUP messages may indicate that the forwarding is taking place. Some operators apply a PGS service node solution. This means that for PGS subscribers, the roaming leg must be routed through a special service node (located in line with the ISUP traffic link for the roaming leg). The service node will propagate the call to the destination MSC. Routing of the roaming leg through a service node can be achieved in accordance with the present invention. The IN service that is invoked with RICK can provide a prefix for the MSRN, which results in the call being routed through the service node. Alternatively, the RICK included in the SRI-Res may have the form of a numerical prefix; a switching node such as GMSC places the RICK in front of the MSRN, before forwarding the call to a next switching node. The analysis of number B in this transition node can be configured in such a way that the RICK results in the selection of a route to the service node. The concept of a generic or subscribed IN service for roaming leg can be used for the following types of services: - Personal congratulation: the reproduction of the personal congratulation is required only when the roaming leg is successfully established; if the roaming leg can not be established, whatever the reason, or is terminated before the answer, then personal congratulations are not required. An operator may wish to invoke PGS before the assignment of an MSRN for the call. The effect of this may be that when it is forwarded to a second called party, the party making the call can still hear the personalized congratulation of the first part. In addition, such configuration would have a defect that the call forwarding announcements could not be heard. - Service node routing: for a particular subscriber, the roaming leg may have to be routed through a service node. - Carrier selection: a subscriber can subscribe to a carrier selection service that is applicable only for roaming. When the HLR 111 sends SRI-Res to GMSC 110 including MSRN, it may include RICK: As an implementation option, the HLR 111 may apply criteria for the inclusion of RICK in SRI-Res, similar to the case in which HLR 111 applies criteria for the inclusion of T-CSI in the first SRI-Res.

These criteria can be for example: - include RICK in SRI-Res only when the subscriber is in HPLMN. include RICK in SRI-Res only when the incoming call is a voice call. Not all MT calls require an IN termination service. In the same way, not all NT calls require a RICK service. By way of example, when a propagated subscriber is in the HPLMN, the HLR 111 can suppress T-CSI in SRI. As a result, an MT call service will not be activated. If the invocation of the roaming section service is still required in this case, then the HLR 111 may include RICK in the first SRI-Res. The subsequent handling of RICK in the GMSC 110 is in accordance with what is described above. Figure 5 is a signaling diagram of an embodiment of the method of the present invention, wherein the invocation of multiple services is performed through a GMSC 110 that interrogates an HLR 111 for multiple services (IN) before the GMSC 110 establishes the roaming section. In this mode, the HLR 111 sends all the information of the IN services to the first interrogation. The steps 501-502 are carried out in accordance with the current state of the art. In this example, 3 SCPs are involved, even though the invention is applicable to multiple SCPs. Step 501 An ISUP IAM arrives at GMSC 110. Step 502 The GMSC 110 analyzes the Number of the Party Receiving the Call in ISUP IAM and deduces that the Number of the Receiving Party is an MSISDN belonging to its own net. The GMSC 110 sends MAP SRI to the HLR 111. The GMSC 110 indicates in MAP SRI that CAMEL supports: The GMSC can support multiple CAMEL phases. Step 503 The called subscriber has a subscription to a CAMEL service for MT call handling. As a result, HLR 111 sends MAP SRI-res to GMSC 110 including IN activation information to carry its MT, T-CSI. Step 504 The GMSC 110 uses T-CSI to invoke a CAMEL service. The GMSC 110 instantiates an internal gsmSSF entity. The gsmSSF sends CAP IDP to SCP 121. The address of SCPl 121, and other data related to this IN dialogue, is obtained from T-CSI. Step 505 Step SCPl 121 responds with Continue CAP (CUE) or Connect CAP (CON) to inform GMSC 110 that the MT call handling can continue, that is, the call can be delivered to the called subscriber. The control dialogue SCPl 121 GMSC 110 can be retained or terminated, according to the IN service requirements. The CAMEL service in SCPl 121 has no knowledge of other IN services outside the CAMEL service that is currently running. Step 506 The GMSC 110 responds by invoking a second IN service, which could again be a CAMEL service, based on T-CSI. The address of SCPn 122 is obtained from the second T-CSI. Step 507 The SCP responds with CAP CAP or CAP WITH, to inform GMSC 110 that the handling of the call can continue, that is, the call can be delivered to the called subscriber. Here too, the CAMEL service at SCP2 122 has no knowledge of the first service or the third service with this call.

Step 508 The GMSC 110 reviews whether additional IN services are provided for the subscriber; if this is the case, then respond by invoking the third IN service, which could again be a CAMEL service, based on T-CSI. The address of SCP3 123 is obtained from the third T-CSI. Step 509 The SCP 123 responds with CAP CUE or CAP WITH, to inform the GMSC 110 that the handling of the call can continue, that is, the call can be delivered to the called subscriber. The CAMEL service in SCP3 123 has no knowledge in full service nor of the second service for this call. Step 510 GMSC 110 reviews whether additional IN services are contemplated for the subscriber; if there are no more IN services for the subscriber, then the GMSC 110 responds by sending a second interrogation to the HLR 111, that is, by sending a second MAP SRI to the HLR 111. Step 511 The HLR 111 recognizes the MAP SRI as a second SRI and responds by sending MAP Route Providence Number (PRN) to VMSC 112 where the called party is currently registered. Step 512 The VMSC 112 assigns an MSRN and returns the MSRN to the HLR 111 by sending MAP PRN-Res to the HLR 111. Step 513 The HLR 111 forwards the MSRN to the GMSC 110, by sending the MAP SRI-Res to the GMSC 110. Step 514 The GMSC 110 establishes the roaming leg to the called subscriber by sending the ISUP IAM to the destination exchange. The ISUP IAM contains the MSRN that was received from the HLR 111. Figure 6 is a signaling diagram of one embodiment of the method of the present invention wherein multiple IN services are invoked for an MO call. In this mode the following steps occur: Step 601 A subscriber 621 registers with an MSC 623 in a visited GMSC network. Step 602 MSC 623 contacts HLR 111 in PLMN of subscriber 621 address. Step 603 HLR 111 sends multiple activation elements for IN services to MSC 623. These activation elements are associated with IN services for calls originating of mobile stations and forwarding calls to mobile stations. Step 604 Subscriber 621 establishes an MO call. Step 605 MSC 623 uses a first activation element to invoke a first IN service in SCPl 121 associated with the first activation element. Step 606 The first IN service in SCPl 121 gives call control back to the MSC 623 by sending a Continue CAP message a Connect CAP message. Step 607 MSC 623 uses the second activation element of the list of activation elements to invoke a second IN service in SCP2 122. Steps 605 and 606 are repeated with SCP2 122 (steps 607, 608) and SCP3 (609, 610) and repeatedly until all indicated IN services are invoked. The call processing in MSC 623 proceeds to step 611 in the normal manner: Step 611 The MSC 623 routes the call to destination 627. Any of the IN services invoked may remain active for the entire duration of the call, or may end in a previous stage. The following scenarios are covered by the invention: 1) invocation of IN services in GMSC for MT call handling, followed by invocation of IN service in GMSC for roaming leg. 2) invocation of IN service in GMSC for roaming section. 3) as (1), whereby the HLR sends multiple IN service activation elements in the first interrogation response, with the purpose that these multiple activation elements are used for the invocation of multiple IN services associated with the call of MT. 4) As (1) whereby the HLR sends multiple IN service activation elements in the second interrogation response, with the purpose that these multiple activation elements are used for the invocation of multiple IN services associated with the roaming leg . 5) as (2), whereby the HLR sends multiple IN service activation elements in the second interrogation response, with the purpose that these multiple activation elements are used for the invocation of multiple IN services associated with the roaming 6) as (1), so they combine (3) and (4). 7) As (1), whereby the HLR sends multiple IN service activation elements in the first interrogation response, with the purpose that some of these multiple activation elements are used in the invocation of multiple IN services associated with the MT call and some of these multiple activation elements are used for the invocation of multiple IN services associated with the roaming leg. 8) Certain IN services for MT calls are required only when a roaming leg is established. The present invention offers the tools to achieve these. 9) The present invention can be used to route a roaming leg through an ISUP service node on a subscription basis or generically for all subscribers served.

Claims (21)

1. CLAIMS 1. A method for managing Intelligent Network services associated with a call to a subscriber in a mobile telecommunication network, the network comprising a control node (110), a Home Location Register (111) and one or more Service Control Points (121, 122, 123), the method comprises the steps of: a. said control node (110) sends (101) to said Home Location Register (111), one or more requests for routing information associated with said call; b. said control node (110) receives (102) from said Home User Location Register (111) service activation elements associated with said services; c. said control node (110) uses said activation elements to invoke (103) said services in said one or more Service Control Points (121, 122, 123); d. said control node (110) receives (104) from said one or more Service Control Points (121, 122, 123) information related to said services associated with said activation elements. The method according to claim 1, wherein said Home Location Register (111) sends a first service activation element of said multiple service activation elements in response to a first request for routing information and a second service activation element of said multiple service activation elements in response to a second request for routing information. The method according to claim 1, wherein said Home Location Register (111) sends said multiple service activation elements in response to a first request for routing information. The method according to claim 2 or 3, wherein said Home Location Register (111) sends the requested routing information in response to a second request for routing information. The method according to any of claims 2-4, wherein said second request for routing information is associated with the establishment of a signaling connection between said control node (110) and a Station Services Switching Center. Visited Mobiles (112). 6. The method according to any of the preceding claims, wherein said requested routing information comprises a Mobile Station Roaming Number to be used for calling said subscriber. 7. The method according to any one of the preceding claims, wherein several of said service activation elements are found in a Mobile Station Application Part Message. The method according to claim 7, wherein said Mobile Station Application Part Message is sent from said Home User Location Register (111) to said Control Node in multiple Control Party Message Signaling Connection, due to the segmentation of the Mobile Station Application Part. The method according to any of claims 1-6, wherein one or more of said service activation elements are included in a Mobile Station Roaming Number with prefix or suffix. 10. The method according to any of claims 1-6, wherein said service activation elements comprise separate parameters. The method according to any of the previous claims, wherein a first service of said service is executed in a first Service Control Point (121) of said one or several Service Control Points (121, 122, 123). ) and a second service of said services is executed in a second Service Control Point (122) of said one or several Service Control Areas (121, 122)., 123). The method according to claim 11, wherein a first service of said prepaid charge service. The method according to claim 11 or 12, wherein a second service of said service is a mobile termination service such as, for example, a personal greeting service. The method according to any of the preceding claims, wherein said control node (110) is a Mobile Station Switching Center of Gate (110). The method according to any of claims 2-14, wherein said first request contains an ISDN number of Mobile Station of said subscriber. The method according to any of claims 2-15, wherein said second request contains an ISDN number of Mobile Station of said subscriber and a parameter of "Delete T-CSI". The method according to any of the preceding claims, wherein a first request or a second request of said one or more requests for routing information of a Routing Information message sent by the Mobile Station Application. 18. A control node (110) for handling Intelligent Network services associated with a call to a subscriber to a mobile telecommunication network, the network comprising said control node (110), a Home Location Register (111) and one or more Service Control Points (121, 122, 123); the control node (110) is configured to send to said Home Location Register (111) one or more requests for depletion information associated with said call; the control node (110) is further configured to receive said Home Location Register (111) multiple service activation elements associated with said services, and to invoke said services in said one or more Service Control Points (121). , 122, 123) by using said activation elements; the control node is further configured to receive from said one or more Service Control Points (121, 122, 123) information related to said services associated with said activation elements. 19. A computer program comprising program instructions for causing a computer to perform the method according to any of claims 1-17. 20. A computer program in a medium comprising computer executable instructions for causing a computer to perform the method according to any of claims 1-17. 21. A computer program according to claim 19, wherein said support is a recording medium, computer memory, read-only memory, or an electrical carrier signal.