FI109751B - Procedure and system for call forwarding automatically - Google Patents

Description

109751

A method and system for automatically dividing calls

The invention relates to the implementation of an automatic call distribution system in mobile communication systems.

More particularly, the invention relates to a method for transmitting calls in a mobile communication system comprising at least one mobile switching center, an intelligent network service control point and at least one terminal connected to the mobile switching center.

The invention further relates to a mobile communication system comprising at least one mobile switching center, an intelligent network service control point and at least one terminal connected to the mobile switching center.

A further object of the invention is an intelligent network service control point arranged in functional connection with at least one mobile switching center.

15 In public telecommunication networks, such as mobile networks, various telecommunication services, such as voice and fax calls and short message services, are provided to the network customer or subscriber. In addition, subscribers are offered various bearer services, which define, for example, the data rates used. Increasing demand for telecommunication services has highlighted the need to refine telecommunication services in such a way that subscribers are as accessible as possible and, on the other hand, the subscribers themselves can be controlled. Subscribers want to: You also open up control over the cost of the services they use. Based on these needs, various supplementary services for telecommunication networks have been developed, such as call transfer, call barring, call hold, and call cost reminder. Some additional services are typically free for all subscribers, while some additional services are chargeable and must be ordered separately from your network operator.

Similar additional services have also been developed for digital mobile networks. For example, the so-called GSM system (Global System for Mobile 30 Communication). Many additional services have been created in the standardization of Phase 2 and Phase 2+ that allow the mobile subscriber to improve and control the routine. ··. and reduce their connection costs. The additional services provided are · · always operator-specific and depend on not only demand, but also the technology of the network infrastructure used. Information about subscribers' subscriptions • · * 35 are stored in network elements of a mobile network, typically the Home Location Register (HLR).

2,109,751

In digital mobile networks, such as the GSM system, standardized additional services provide a basis for the kind of additional services that network operators can provide to subscribers. Phase 2 of the GSM system standardized a number of additional services, such as redialling to a busy number, conditional call forwarding, conditional call barring, caller identification, and conference calling. In the 2+ phase of standardization, many new additional services have been developed that make better use of the GSM system, such as web-based caller name display, multiple subscriber profiles, advanced call transfer functions, and various billing services.

The problem with the arrangement described above is that, despite many additional services, digital mobile communication systems, especially the GSM system, still do not allow queuing of calls. This would be particularly important, for example, when dialing mobile-based service numbers or trying to connect to otherwise congested areas, such as in-house IT support or service personnel. In this case, the number is often busy, but the network system does not allow multiple callers to be queued to the desired number. Automatic redialing of a busy number consumes a lot of network capacity and still does not put callers in the queue in order to call, but speech to a liberated number is done in a completely random order. Queuing typically requires the installation of a separate telephone exchange (PBX, Private Branch Exchange) within the company, which is a significant cost, especially for small businesses.

• · ·

It is therefore an object of the invention to provide a method and an apparatus implementing the method so that the above problems can be solved. The objects of the invention are achieved by a method characterized by transmitting the subscriber status information and the location information of the terminal to the intelligent network service control point:. 30 calls to the service control point are transmitted from the mobile switching center to:. at the service control point, selecting the first terminal for which. · · ·. the call to the call number is wanted to be controlled, the subscriber status information of the first master device mentioned at the service control point is checked, and: ,,, ·· 35 transmits the command from the service control point to the mobile switching center: 3 109751 - makes a call connection to said first terminal the subscriber status information indicates that the terminal may receive the call or - queue the incoming call in response to the subscriber status information of said first terminal indicating that the terminal is in a state in which it is unable to receive the call.

The mobile communication system according to the invention is characterized in that the mobile switching center is arranged to forward the subscriber status information and the location information to the intelligent network service control point, the mobile switching center is arranged to forward the information , check the subscriber status information of said first terminal and alternatively transmit to the mobile switching center a command to: indicates that the terminal is in a state: where it cannot receive I'm making a call.

The intelligent network service control point according to the invention is characterized in that t · .... 25 control points are arranged to receive and store subscriber status information and location data of the terminal devices and v 'to control the queuing and call switching of incoming calls to the terminals according to the subscriber status information.

According to a preferred embodiment of the invention, said control point maintains information about queued calls. Still baking ·· *. according to a preferred embodiment of the invention, commanding from said control point * "to the gateway mobile switching center to connect a first call in the queue ... to the said terminal in response to a change in subscriber status information of the terminal so that the terminal may receive the call. 109751 is tuned to an automatic call distribution system by transmitting an activation message from the terminal to the control point.

The invention is based on the fact that the service control point of the intelligent network gives instructions to the gateway mobile switching center to connect the calls to the terminals connected to the voice-delivery system, the information of which is maintained at the service control point. If the terminal is busy or unavailable, incoming calls can be queued at the gateway mobile switching center. The service control point maintains the queuing information and instructs the gateway mobile switching center to connect the calls in the queue when the terminal is released to receive a new call.

An advantage of the method and system of the invention is that the invention enables the creation of a network-based call queuing and distribution system in a mobile communication environment, which eliminates the need for a dedicated PBX especially for small businesses. Further, the invention allows a list queuing system for calls to a particular service number and distribution to a plurality of terminals. A further advantage of the invention is that the invention can be advantageously implemented mainly as software updates at a service control point of the intelligent network, whereby no new network elements are needed. An advantageous embodiment of the invention has the advantage that the users of the terminals belonging to the call distribution system 20 can themselves control their activation to the said system, whereby, for example, the routing of business calls to the terminal can be restricted to working hours only. According to a further preferred embodiment of the invention, the maintenance of certain terminal information belonging to the mobile communication system is performed in the home system register of the mobile communication system, whereby the arrangement according to the invention also supports roaming to other mobile networks.

The invention will now be further described in connection with the preferred embodiments, with reference to the accompanying drawings, in which: Figure 1 shows a mobile communication system according to the GSM system; ·. Figure 2 illustrates a mobile communication system according to the invention. substantially; FIG. 3 illustrates, by means of a signaling diagram, a change in the activation mode of the terminal device of the invention; ..!: '; Figure 4 illustrates, by means of a signaling diagram, a speech connection according to the invention; 5,975,751 FIG. 5 shows a signaling diagram of another call connection according to the invention and FIG. 6 shows a signaling diagram of a call transfer according to a preferred embodiment of the invention.

5, a typical network environment utilizing additional services according to the GSM system is described. The GSM system comprises mobile stations (MS, Mobile Station) which are in radio communication with Base Transceiver Station (BTS). A plurality of base stations BTS are connected to the Base Station Controller (BSC), the available radio frequencies and channels being controlled by the Base Station Controller (BSC). The base station controllers BSC, in turn, communicate with the Mobile Services Switching Center (MSC), which takes care of establishing the connection and routing the calls to the correct addresses. Two databases containing information about mobile subscribers are used for this purpose: the Home Location Register (HLR) 15 and the Visitor Location Register (VLR). The home subscriber directory HLR contains information about all subscribers of the mobile network and the services they subscribe to: telecommunications services, network services and ancillary services. The visitor location register VLR comprises information about mobile stations visiting the area of a particular mobile switching center MSC. Mobile Switching Centers 20 The MSCs can be further classified as Visiting Mobile Switching Centers (VMSC, Visited MSCs), which in turn communicate with other mobile switching centers (PSTNs) and the Public Switched Telephone Network (PSTN) via a gateway mobile switching center (GMSC, Gateway MSC). For a more detailed description of the GSM system, reference is made to the ETSI / GSM Specifications and the book "The GSM System for Mobile Communications," by M. Mouly and M. Pautet, Palaiseau, France, 1992, ISBN: 2-957190-07-7.

In particular, the mobile services switching center MSC and the home subscriber directory play an essential role in the system described above for the additional services: '' i HLR and the visitor location register VLR. Subscriber data is stored in the home directory 30 HLR. This subscriber information includes subscriber identification information, subscriber-specific telecommunication and network service descriptions, and associated restrictions and additional service descriptions, which also include the status of each additional service; whether the subscriber is registered for the additional service and whether the additional service is activated. The visitor location - .. li * register VLR maintains information on the 35 mobile stations in the MSC area of a particular mobile switching center; their identification information, their location, and the 6,109,751 additional service descriptions transmitted from the HLR visitor location register to the VLR registration. The mobile services switching centers MSC receive the subscriber access service related information in connection with call setup either from the home subscriber location register HLR or the visitor location register VLR, based on which the mobile services switching centers perform the functions defined in the additional service descriptions. The mobile station MSs include a subscriber identity module (SIM), the subscriber identity information of which is transmitted to the network. Based on this identification information, additional subscriber-specific service descriptions may be retrieved from the HLR or the VLR. Many of the additional services can be activated by the mobile station MS interface (MMI), but some services are activated by contacting a service provider or network operator who, upon request, activates the desired additional service.

In the following, the invention will be described in accordance with Figure 2. The invention will be described by way of example on the basis of a GSM system, but the invention may be implemented in any similar communication system comprising corresponding network elements. For example, the so-called the third generation mobile communication system UMTS (Universal Mobile Telecommunication System) will be based on the GSM network architecture and comprise essential network elements similar to the GSM system described in Example 20. Thus, the invention is also applicable to a UMTS system.

. . ·. Figure 2 illustrates a gateway mobile services switching center GMSC, to which incoming calls are further routed to visiting mobile services switching centers VMSCs for mobile stations MS1 to MS3. Typically, calls to ... 25 gateway mobile switching center GMSCs come from the Public Switched Telephone Network (PSTN / ISDN) or from the same or another Public Land Mobile Network (PLMN). In order to illustrate the invention, FIG. 2 illustrates a VMSC and a gateway mobile switching center 30 as separate mobile switching centers, but the mobile network may also: · comprise only one mobile switching center, which then serves as both a logical gateway and a roaming mobile. ; · Na. This also happens when the mobile station to which calls are routed is located in the GMSC area of the gateway mobile switching center. From said mat-35 mobile communication centers GMSC, VMSC is further provided with a communication link to a service control point (SCP, Service 7 109751) of the Intelligent Network (IN).

Control Point). The communication connection may advantageously be implemented using the MAP (Mobile Application Part) or INAP (Intelligent Network Application Part) protocols, which are known per se in the mobile and intelligent network environment.

The invention utilizes the known method of using smart-5 network-based solutions connected to a mobile network, in particular for implementing additional services. Intelligent network solutions enable the implementation of additional services without the need for the implementation of the services as such to comply with any standard. This is accomplished by separating the logical partitions of the system that perform call switching and additional service.

10 In the intelligent networks, the system element implementing the additional service is called the service control point SCP. The control point SCP controls all outgoing and incoming calls of the mobile subscriber, regardless of the subscriber's location. Intelligent networks also allow access to additional services provided by the home operator when the mobile subscriber is within range of a Visited Public Landline Mobile Network (VPLMN) having a so-called mobile network. the roaming agreement with the home provider of the mobile subscriber and the visited mobile network VPLMN supports this additional service. If the mobile subscriber is within the VPLMN of the roaming mobile network, the Home Public Landline Mobile Network (HPLMN) 20 provides the roaming mobile network with all necessary subscriber information. The Home Subscriber Register HLR stores additional services for each subscriber. . ·. defines additional service descriptions, which typically include separate reference information for outgoing and incoming calls, and which determines where the service control point SCP will operate. The control point SCP typically comprises -... 25 a Service Control Function (SCF) to update additional service descriptions in the home subscriber directory HLR and to maintain the location information of the mobile subscribers. When the mobile subscriber moves to the area of the visited network, the required additional service descriptions are also updated in the visitor location register VLR of the calling network. In connection with the MSC of the visited network 30, there is a Service Switching Function (SSF) for checking the configuration of the [... ... wide range of advanced services, especially for outgoing calls. Preferably, the intelligent network solution used may be a CAMEL (Customized Applicability for Mobile Enhanced Logic) network standardized for GSM system 35. The CAMEL concept is described in more detail in GSM Recommendations 02.78 and 03.78.

8 109751

In the arrangement of Figure 2, the queuing can be implemented by means of the intelligent network service control point SCP and certain additional services known per se, for example in the GSM system. The GSM Ice System 2+ stage has standardized mm. an additional service for making a call to a dedicated number 5 (CCBS, Call Completion to Busy Subscriber) where, when attempting to call a busy number, the network monitors the availability of a busy number and then informs the caller that the number is now free. If the caller is responsible for the number released by the network announcement, the network will only connect to the originally called (busy) number. If caller 10 does not respond to the number released by the network notification, the CCBS service associated with this call is removed from the network. Thus, when dialing a busy or otherwise unavailable number in the network, there is a subscriber status information about the status of each such number, i.e. whether the number is reachable, i.e. free, or unavailable, i.e., busy or not connected to the network.

According to the invention, the subscriber numbers to which queuing is to be arranged can be registered in a mobile communication network, preferably in the home subscriber directory HLR, so-called. Automatic Call Distribution (ACD). In this case, the information in the home subscriber directory of the subscriber number is defined as an ACD number, whereby all calls to the gateway subscriber station GMSC are forwarded to the control point SCP. Typically, these ACD numbers are • ·. . ·. different service numbers, whereby the service number to be dialed and the ACD numbers to which "calls to said service number are forwarded" are different numbers. The service number to be dialed need not necessarily be a number according to the mobile network-specific numbering system; * * * * The mobile switching center GMSC identifies the dialed number as a service number to be forwarded to the control point SCP, e.g., 0800-12345, where the 0800 number range tells the gateway mobile switching center 30 to have a service like this. .

The subscriber status of the CCBS service described above relating to ACD numbers

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the information is transmitted from the network, typically from a gateway mobile switching center to · · GMSC to the control point SCP. Advantageously, INAP signaling may be used to convey information. Also, the paths needed to locate the mobile subscribers are transmitted to the control point SCP. This can advantageously be accomplished in conjunction with location updates 9 109751 (location updates) of mobile subscribers within the mobile communication system, whereby the visited mobile switching centers VMSC transmits the location information of the mobile subscribers to the control point SCP using, for example, MAP or INAP signaling. For the control point SCP, the relevant information obtained in the context of the location updates is to which visitor mobile station VMSC the subscriber is currently associated. Then, as the mobile subscriber moves to the area of the new mobile switching center VMSC, the control point SCP requests a request from the new mobile switching center VMSC to monitor the mobile subscriber. According to the invention, call queuing is implemented in gateway mobile switching center 10 GMSC, which transmits information to the control point SCP if a service number connected to the ACD number (s) is called. The control point SCP stores subscriber status information and positioning information for each ACD subscriber. The control point SCP checks the status of the called subscriber and instructs the GMSC Gateway to either keep the call on hold if the dialed number is busy, or connect the call to the dialed number if the number is free or when the number becomes available. The control point SCP is preferably arranged to queue the dialed calls in the order in which the calls to a particular gateway mobile switching center GMSC arrive at a particular ACD number. Correspondingly, the control point SCP instructs the gateway mobile station 20 GMSC to direct calls to said ACD number in a queue.

• ·. According to a preferred embodiment of the invention, the mobile station registered as an ACD subscriber informs the intelligent network service, typically, [[[. directly to the service control point SCP, its activation state, i.e. whether said mobile station is ready to receive • calls according to the ACD service. This allows the mobile user, for example, to connect to the ACD- »* · * service when entering work by notifying the control point SCP of its on-duty activation state. Similarly, upon leaving work, the user may register an off-duty activation state, whereupon the control point SCP removes that mobile station from the ACD call setup list. The communication between the mobile station and the control point can advantageously be accomplished by direct wireless data transmission, such as via a Short Message Service (SMS) or an Unstructured Supplementary Service Data (USSD). The additional USSD service allows for the transmission of operator-specific additional service messages both from the mobile station 35 to the network and vice versa. Additional USSD Service Messages can be configured so that they do not need to conform to the standard. The data transfer may also be accomplished by storing in the memory of the mobile station information identifying it to be in a localized service area (LSA), for example, an office cell area, and the mobile station is programmed to send an activation message SCP 5 described above. . In addition to location, LSA configurations may include time assignments, limiting the sending of activation messages, for example, to office hours.

Based on Figure 3, the following describes in more detail the updating of the activation state of a mobile station registered as an ACD subscriber to the ACD service maintained by control point 10 SCP. According to a preferred embodiment of the invention, the control point SCP is itself controlled by the ACD subscriber to start and stop monitoring the subscriber-specific ACD service. This means that the ACD subscriber notifies the control point SCP of changes in its activation mode, which performs monitoring according to said activation mode. In the signaling diagram of Figure 3, the ACD subscriber's activation state is initially off-duty, whereby the control point SCP has not connected said mobile station to the ACD service receive list, and no calls according to the ACD service are routed to the mobile station. When the ACD subscriber is ready to receive ACD calls, for example, when he or she is at work, the ACD subscriber notifies the control point SCP of its on-duty activation state 20. In response to a change in activation state, the control point SCP assigns the mobile station to the receiving list and initiates the subscriber status and push of the mobile station. . ·. monitoring of incentive data. The control point SCP instructs the gateway message center GMSC to route calls to the mobile station based on subscriber status information. In on-duty mode, the ACD subscriber can move within the VMSC of the various mobile switching centers, whereby the control point SCP is routed to the originating * · When the ACD subscriber wishes to disconnect from the ACD service, for example when leaving work, the ACD subscriber notifies the control point SCP of its off-duty status for the Akti Active Mode, and the control point SCP removes the ACD-30 call list from the mobile station. monitoring of subscriber status and location • X.

t · ·

Thus, for call routing, the control point SCP maintains *; * 'two different status information for each ACD subscriber: ACD service activation status information and CCBS auxiliary service subscriber status information. The ACD service activation status information 35 may be either on-duty or off-duty. If the ACD subscriber activation status information is off-duty, the subscriber status information need not be maintained. Instead, if the ACD subscriber activation status information is on-duty, the subscriber status information is updated to either 'unavailable' or 'unavailable'. The ACD subscriber is 'unavailable' if the subscriber number is busy or the mobile station is not connected to the network.

Figure 4 illustrates signaling according to the invention if the ACD subscriber connects to an ACD service and receives an ACD call. At the beginning of the signaling, the registered ACD subscriber (MS) sends a status message (41) to the control point SCP, in which the ACD subscriber notifies its ACD service activation status on-duty. The control point SCP begins monitoring the subscriber status information of the ACD subscriber at the mobile switching center VMSC, within which the ACD subscriber mobile 10 message MS is located. A control message (startMonitoring (Attendant), 42) is sent to the mobile switching center VMSC, whereby the mobile switching center VMSC begins monitoring the ACD subscriber and in response to which control message it returns the current subscriber status information "available" (idle, 43). Thus, the control point SCP detects that the ACD subscriber is ready to receive ACD calls.

The calls to the service number are routed to the gateway mobile services switching center GMSC, which transmits to the control point SCP that the said ACD number is being called. The control point SCP checks the status of the called subscriber and instructs the gateway mobile switching center GMSC (connect (Attendant), 44) to direct the call to the called number because the status of the number 20 is "available" (idle). The gateway mobile services switching center GMSC provides * *. '·· a call setup command (Attendant), 45, to the visiting mobile switching center VMSC, which further connects the call (setup, 46) to the ··· number of the ACD subscriber. At the same time, the mobile switching center VMSC informs the control point SCP,

I I I

• that the subscriber status information of said ACD subscriber has changed and is now 'no- • v. 25 available '(notldle, 47). When the call to the ACD subscriber ends, the VMSC is notified (release, 48), which further »· · informs the control point SCP that the subscriber status information of said ACD subscriber is. , changed again, and is now 'available' (idle, 49). The control point SCP has t]: then the ACD subscriber is again ready to receive ACD-30 calls.

s

In order to simplify the invention, a situation has been described above in which one ACD subscriber receives calls to a specific ACD service number. Said service numbers may also be implemented such that a particular telephone service may comprise one or more telephone numbers to which incoming calls are further routed to multiple ACD subscribers. The number of telephone numbers and the number of ACD subscribers need not be the same. The following signaling scheme 12,109,751 of Figure 5 illustrates the arrangement of queuing and call distribution in a mobile communication network according to the invention, in which calls to a single ACD service number are routed to multiple ACD subscribers. The control point SCP monitors the 5 ACD subscribers connected to the visited mobile switching centers VMSC. In the situation of Figure 5, the subscriber status information of all ACD subscribers registered to the same ACD service number is 'unavailable', whereby new calls to said ACD service number have to be queued. For example, from a public switched telephone network (PSTN), a call to said ACD service number is made, whereupon the call 10 (setup (serviceNumber), 51) initially connects to the gateway mobile switching center GMSC, which further activates (initialDP (serviceNumber), 52) a call control system The call point control system SCP pu is now responsible for call control. Since all ACD subscribers are 'inaccessible', the control point SCP connects the incoming call to the already-15 and connects to the call a notification (playAnnouncement, 53) that the call is in queue. Thus, the logic required for arranging the entire queue can advantageously be implemented at the control point SCP. The control point SCP is continuously ready to receive from the mobile services switching centers VMSC information on the subscriber status information of the associated ACD subscribers. When an ACD subscriber is released, i.e., the subscriber status information changes from 'not reachable' to 'reachable', the corresponding * *. '·· mobile VMSC notifies the (idle, 54)

\ j ': SCP. The control point SCP provides the gateway mobile services switching center GMSC

: · A command (connect (freeAttendant), 55) connects the first call in the queue to the released ACD number. If a plurality of ACD numbers are dialed substantially simultaneously, the control point may select an ACD number for the call based, for example, on the location of the terminal. In response to the connect-> »* command, the gateway mobile switching center GMSC gives the visiting mobile switching center VMSC a call setup command (setup (freeAttendant),» · 56). Initially, the last incoming call to the gateway mobile switching center GMSC is always set to last, while the ACD- to be released is preferably connected to the first call in the queue.

"·. The telephone service may also be implemented so that the service comprises * »> multiple ACD numbers, each of which is connected to a single terminal.

1 · * ;;; In this case, the connection of the ACD subscriber to the ACD service and routing of calls to 35 terminals takes place as described above in connection with Figure 4. The problem with the customer service may then be that there will be multiple calls to a single 13,109,751 ACD number, which will be queued up while other terminals may be idle. This can be resolved, in accordance with a preferred embodiment of the invention, by the control point SCP monitoring all ACD numbers associated with the same telephone service and also checking the subscriber status information of other ACD subscribers before placing calls in the queue. If any of the other ACD subscribers are idle, the control point SCP instructs the GMSC Gateway MSC to direct the incoming call to the busy ACD number to the free ACD number.

In different service numbers, it may easily be the case that 10 received calls need to be forwarded to another number. For example, in the case of various expert services, someone other than the person answering the call may be more familiar with the problem in question, so it makes sense to transfer the call to that other expert. The problem then is that the number to which the transfer was made does not match. For the case service, it would be desirable for the forwarded call to revert back to the originally dialed number within the time limit, but a new call may already have been connected to the forwarding number. According to a preferred embodiment of the invention, this can be avoided by the arrangement illustrated in the signaling diagram of Fig. 6.

In FIG. 6, the control point SCP still monitors the traveling distance. . message centers VMSCs and associated ACD subscribers and their subscriber status information. If any ACD subscriber performs call forwarding, the mobile switching center VMSC informs (control (invokeCT), 61) the control point SCP. Further, the mobile switching center VMSC informs the control point SCP that subscriber status information of said ACD subscriber 25 has become 'available' (idle, 62). In response to this, the control: T: point SCP initiates a timer during which the transferred call can be: T: returned to the number that made the transfer. If the call forwarding is not resumed within the preset grace period, said ACD subscriber may receive: new calls after the grace period has expired.

According to a preferred embodiment of the invention, the invention "* may alternatively be implemented such that the mobile network home location register: '·· HLR monitors ACD subscriber status information and location information. In this case, 35 advantageously known MAP signaling .The implementation of this embodiment of the invention requires that the control point SCP and the home location register HLR have a minimum of 109751 14

A special signaling protocol is created at Nile, which enables the SCP to submit requests to the home location register HLR, which requests to start or stop monitoring a particular ACD subscriber. Further, the protocol must allow the home location register to report to the control point SCP ACD-5 subscriber status and location changes. An advantage of this embodiment of the invention is that the method according to the invention supports roaming to other mobile networks VPLMN which also use the CCBS supplementary service. A further advantage is that the location updates of the ACD subscribers do not need to be notified by the visiting mobile switching center VMSC to the control point 10 SCP. Also, the implementation of the control point SCP can be simplified by the procedure described.

It will be obvious to a person skilled in the art that as technology advances, the basic idea of the invention can be implemented in many different ways. In particular, the invention may be implemented in any telecommunication system comprising elements essential to the implementation of the invention. The invention and its embodiments are thus not limited to the examples described above, but may vary within the scope of the appended claims.

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Claims (25)

A method for transmitting calls in a mobile communication system comprising at least one mobile switching center (MSC), an intelligent network service control point (SCP) and at least one terminal (MS) connected to the mobile switching center, characterized by transmitting subscriber status information and location information to the intelligent network SCP), transmitting from the mobile services switching center (MSC) information on the call entering the call number to the service control point (SCP), selecting the first terminal (MS) at the service control point (SCP) to control the incoming call, checking the first terminal ( MS) subscriber status information and transmitting from the service control point (SCP) to the mobile services switching center (MSC) an alternative: - making a call connection to said first terminal in response to the subscriber status information of said terminal indicates that the terminal may receive the call; or 20. queuing the incoming call in response to the subscriber status information of said first terminal indicating that the terminal is in a state where it cannot receive the call. A method according to claim 1, characterized in that the subscriber status information of the second terminal is checked at the service control point in response to the fact that said call number is common to a plurality of terminals and the subscriber status information of said first terminal indicates the terminal. . the device being in a state where it is unable to receive a call and transmitting from the service control point to the mobile switching center a call connection to said second terminal in response to the subscriber status information of said second terminal indicating that the terminal may receive the call. A method according to claim 1, characterized in that:; that 35 check the subscriber status information of the terminal connected to the second paging number at the service control point in response to the telephone service comprising 16 109751 multiple terminal-specific paging numbers and said subscriber status information of said first terminal indicating that it is unable to to a terminal connected to the second paging number in response to the subscriber status information of said terminal indicating that the terminal may receive the call. A method according to any one of the preceding claims, characterized in that information about queued calls is maintained at said service control point. A method according to claim 4, characterized by transmitting from said control point to the mobile switching center a command to connect the first call in the queue to said terminal in response to the subscriber status information of said terminal changing to indicate that the terminal is able to receive the call. A method according to any one of the preceding claims, characterized in that said terminal is pre-registered for automatic speech. . lunjakelujärjestelmään. A method according to claim 6, characterized in that '··' · 'activates said terminal in said automatic call-distribution system by transmitting an activation message from said terminal to said control point. A method according to any one of the preceding claims, characterized in: performing a call transfer from a terminal to a third party, informing the service control point of the call transfer performed by said terminal,: · · triggering a timer in the service control point to: §t]: subscriber status of said terminal changes to indicate the terminal [:. the device being able to receive the call and 17 109751 reconnecting the call to said terminal in response to said third party not answering the call during a time determined by said timer. Method according to one of the preceding claims, characterized in that the subscriber status information and the location information of the terminal equipment are maintained in the home location register (HLR) of the mobile network and transmitted to the control point of the intelligent network service. Method according to one of the preceding claims, characterized in that the mobile communication system comprises a gateway mobile services switching center (GMSC) and at least one visited mobile services switching center (VMSC). A method according to any one of the preceding claims, characterized in that said terminal selection is performed at the service control point based on the location information of the terminal. A method according to any one of the preceding claims, characterized in that said terminal subscriber status information is subscriber status information of the CCBS supplementary service according to the GSM system and said location information is GSM. . system-specific location information. A mobile communication system comprising at least one mobile switching center (MSC), an intelligent network service control point (SCP) and at least one terminal (MS) connected to the mobile communication center (MS), characterized in that the mobile switching center (MSC) ) is arranged to transmit the subscriber status information and the location information of the terminal (MS) to the intelligent network service control point (SCP),. : The mobile services switching center (MSC) is arranged to forward the call to the · · I. ··] 30 numbers to the service control point (SCP), the service control point (SCP) is arranged to select the first: '·· terminal (MS) to which the call received it is desired to control, check the subscriber status information of said first terminal and transmit the command to the mobile services switching center (MSC) as an alternative: »i» i II · I 18109751 - make a call connection to said first terminal in response to subscriber status information from said terminal a call queue in response to the subscriber status information of said first terminal indicating that the terminal is in a state where it is unable to receive the call. A mobile communication system according to claim 13, characterized in that the service control point is arranged to check the subscriber status information of the second terminal 10 in response to said call number being common to multiple terminals and the subscriber status information of said first terminal indicating that it is unable to receive a call and making a call connection to said second terminal in response to the subscriber status information of said second terminal indicating that the terminal is capable of receiving the call. A mobile communication system according to claim 13, characterized in that the service control point is arranged to check the subscriber status information of the terminal connected to the second access number 20 in response to the telephone call. . the call comprises a plurality of terminal-specific paging numbers, and subscriber status information of said first terminal indicating that the terminal is in a state where: ··: ·: it is unable to receive a call and forward to the mobile switching center a call-25 field in response to a terminal connected to said second paging number; said subscriber status information of said terminal indicating that the terminal is capable of: T: receiving a call. 15 109751 A mobile communication system according to any one of claims 13 to 15, characterized in that said service control point 30 is arranged to maintain information on already existing calls. Mobile communication system according to claim 16, characterized in that said control point is arranged to forward to the mobile switching center a command to connect the first call in the queue to said terminal device in response to the subscriber status information of said terminal changing to indicate that the terminal may receive. call. A mobile communication system according to any one of claims 13 to 17, characterized in that said terminal is pre-registered in an automatic call distribution system. A mobile communication system according to claim 18, characterized in that said terminal is arranged to be activated in said automated call distribution system by sending an activation message from the terminal to said control point. A mobile communication system according to any one of claims 13 to 19, characterized in that the terminal is arranged to perform call forwarding to a third party, the mobile switching center is arranged to notify the service control point of call forwarding by said terminal, the service control point is arranged to start a timer in response to the mobile terminal. the subscriber-20 information has changed so as to indicate that the terminal can receive. . and directing the mobile switching center to reconnect the call to said terminal in response to said third party not responding to the call within the time specified by said timer. « A mobile communication system according to any one of claims 13 to 20, characterized in that: T: the subscriber status information and the location information of the terminal are arranged to be maintained in a mobile network home location register (HLR), said information being arranged for transmission to the intelligent network service control point. A mobile communication system according to any one of claims 13 to 21, characterized in that the mobile communication system comprises a gateway mobile services switching center (GMSC) and at least one visited mobile services switching center (VMSC). A mobile communication system according to any one of claims 13 to 22. system, characterized in that the service control point 35 is arranged to perform the selection of said terminal based on the location information of the terminal 20 109751 A mobile communication system according to any one of claims 13 to 23, characterized in that said terminal subscriber status information is a subscriber status information for a CCBS supplementary service according to the GSM system and said location information is a location information according to the GSM-5 system. An intelligent network service control point (SCP) arranged in operative connection with at least one mobile services switching center (MSC), characterized in that the control point is arranged to receive and store subscriber status information and location data of the terminal (MS) and control call queuing and incoming calls to the terminals. based on the subscriber status information and the location information mentioned in the mobile services switching center (MSC). • · • · · »· · * ·» · a · · 109751 21