FR2986685A1 - Registered mobile system, has hub that is allowed to exchange signaling message by utilizing physical and logical connection, where hub includes router, short message processing center, and intelligent platform - Google Patents

Abstract

The system has a subscriber identity module card (150), and a set of sub-networks that is provided with a hub. A single cellular operator is allowed to perform operation and exploitation of the hub that is provided with each of the set of sub-networks. Another hub that is different from the former hub is allowed to exchange signaling messages by utilizing a physical and logical connection that is provided for each of the sub-networks. The latter hub includes a router, a short message processing center, and an intelligent platform. An independent claim is also included for a method for registering a mobile system.

Description

FIELD OF THE INVENTION The present invention relates to a system of mobiles registered in a set of networks with a dual-ID SIM card (called SIM card Double-IMS1 ').

Throughout the description, the abbreviations defined hereinafter and in the glossary will be used. The first of the two identifiers of the SIM-IMS1 'SIM card is called' IMSI mondial ', referenced IMSIMON.

The IMSIMON ID allows a subscriber to register to a 'global' HPLMN network, referenced HPLMNMON. It can therefore consume the mobile telephony services (voice, SMS, data, emails, etc.) available in HPLMNMON. HPLMNMON consists of a set of subnets; each subnet in the set is called 'Hub'. A single cellular operator, referenced OPERATORMON, is responsible for the operation and operation of each HPLMNMON Hub. The OPERATORMON is an 'MNO' or 'Full MVNO' type operator in each 'Hub': it has the necessary equipment to operate its HPLMNMON network and to control the IMsIMON of its subscribers. The IMSIMON identifier consists of a set of IMSI identifiers, each IMSI being controlled by the corresponding 'Hub'. The value of the IMSIMON can change dynamically, because each 'Hub' of the HPLMNMON corresponds to an IMSI identifier; therefore, each subscriber of the HPLMNMON is associated with a set of IMSI identifiers. Each of the IMSI identifiers associated with the subscriber can be activated according to the location of the subscriber. The second of the two identifiers of the SIM Dual-IMS1 'is called' Local IMSI 30 ', referenced IMSILoc. With the IMSILoc identifier a subscriber can register to a HPLMN `local 'network, referenced HPLMNLoe. It can therefore consume the mobile telephony services (voice, SMS, data, emails, etc.) available in HPLMNLoc.

The same OPERATORMON is also `MVNO 'on the HPLMNLoc network. As such, it has agreements with the MNO which has the necessary equipment to operate the HPLMNLoc network. The OPERATORMON buys capacity from its MNO (minutes of voice communication, megabytes of data communication, etc.) and resells them under its own brand to its subscribers. Thanks to the dual-IMSI SIM card provided by the OPERATOR, a subscriber can: Consume the mobile telephony services (voice, SMS, data, emails, etc.) available in HPLMNLoc when he is in his country of origin, country in which HPLMNLoc is deployed. These services will be available at national call prices, because the subscriber's mobile is registered with the HPLMNLoc network with the IMSILoc identifier. Consume the mobile telephony services (voice, SMS, data, emails, etc.) available in HPLMNMON when it is in a roaming situation. These services will be available at very advantageous prices, thanks to the topological configuration of HPLMNMON and all of its 'Hubs'. In a roaming situation, the mobile of the subscriber registers with the HPLMNMON network with an IMSI identifier belonging to the IMSIMON set. Organization of the HPLMNMON network The IMSIMON identifier associated with each subscriber comprises a 'master IMSI' which is registered and known in the equipment of the 'I-lub Main'. IMSIMON also includes one or more 'secondary IMSI' which are registered and known in the equipment of the corresponding Hubs, called Flub Secondary.

The OPERATORMON owns and operates the necessary equipment for the 1-lub Main 'of its HPLMNMON network. The 'Flub Principal' is installed in a specific country, depending on the choice and strategy of the operator. Each subscriber to the system according to the invention corresponds to an 'IMSI Principal', corresponding to the 'Main Hub', referenced IMS1p, which is part of the IMSIMON set. The OPERATORMON owns and operates the necessary equipment for each 'Secondary Hub' of its HPLMNMON network. Each subscriber to the system according to the invention corresponds to a set of identifiers 'Secondary IMSI' corresponding to 'Hub (s) Secondary (s)', referenced IMSls, which are part of the set IMSIMON. In order to clarify the context of the invention, the following exemplary scenario is provided: The HPLMNMON network consists of the following elements: - A 'Main Hub' installed in Belgium. A HPLMNMON subscriber has an IMSIp with Belgian attributes. - A 'Secondary Hub' installed in Hong Kong. A HPLMNMON subscriber has an IMSI with Hong Kong attributes. The HPLMNMON devices know the correspondence between the IMSI Primary IMSIp and IMSI Secondary IMSIs. According to the description of the embodiments of the invention (description to be made later) the subscriber will have 'continental' communication rates depending on the country visited. In particular: If the subscriber moves in the European Community he will have the communication tariffs established by the EC; indeed, it is the IMSIp which is selected from the set of IMSIMONs. If the subscriber travels in the Asia-Pacific region, he will have roaming agreement rates (also known as roaming agreements) between Hong Kong's 'Sub-Hub' and operators in other countries. the region ; indeed, it is the IMSIs that is selected from all the IMSIMONs. In all other countries the subscriber will have the most advantageous communication rates, according to the roaming agreements between the operator of the visited network and - respectively - the 'Hub Principal' (Belgium), and the 'Secondary Hub' (Hong Kong). It is obvious that as many additional 'Sub Hub' can be added depending on the OPERATORmoN's investment capabilities and strategy. The increase in the number of 'Secondary Hubs' allows the world segment to be segmented into a larger set of geographical or geopolitical areas, allowing the subscriber to obtain call rates according to the roaming agreements established at the time. inside each zone. A subscriber to the system according to the invention may be resident in a country which does not have any `Flub '; in this case, it will be able to benefit from local rates if the OPERATORmoN is also MVNO of a network HPLMNLoc deployed in the country of residence of the subscriber. STATE OF THE ART It is known that calls from and / or to a mobile phone in an international roaming situation are expensive. In order to lower the cost of this type of communication, many international travelers choose to change the SIM card ("Subscriber Identity Module") and replace it with a SIM card specific to the 15 cellular networks of the country in which they have just arrived. . However, although this practice is a source of savings, it has the disadvantage of changing the number of the owner of the mobile phone, and make it "unreachable" or "unidentified" for its usual correspondents. There already exist systems with two (or more) SIM cards: a 'nominal' SIM card and one or more 'auxiliary' SIM cards (EP 1942695 A1 patent); the subscriber will use the 'nominal' SIM card or an 'auxiliary' SIM card depending on its geographical location or economic considerations. In the cited patent the subscriber keeps - in all cases - his mobile number. There are also systems under which one (or more) network operator (s) VPLMN allocates (allocates) one or more IMSIs to the operator of an HPLMN to provide these HPLMN subscribers with SIM cards' MuftiIMSI 'and `Multi-MSISDN': these subscribers will be able to benefit from local rates 30 in each VPLMN network whose IMSI is part of the SIM` Multi-IMSI '. According to the patent WO 2005/018245 A2 a signaling gateway operating between the different GMSCs of each operator (VPLMN or HPLMN) allows the realization of the invention. The concepts set forth in WO 2005/018245 A2 can be applied only if each operator (VPLMN or HPLMN) has control of its own IMSI, i.e., whether it is MNO or 'Full MVNO'. OBJECT OF THE INVENTION The object of the invention is to provide a subscriber of the system according to the invention with one and only one SIM card containing: A local identifier IMSILoc which is active when the subscriber is in his country of residence, in which the HPLMNLoc network is deployed. The services are provided by OPERATORMON, which has the status of 'MVNO' on the HPLMNLoc network. - An IMSIMON global identifier that consists of a set of IMSI identifiers, including a 'IMSI Main IMSIp' identifier and one or more 'IMSI Secondary IMSIs' identifiers. The IMSIp or one of the IMSIs is activated according to policies that depend on the location of the subscriber (country of roaming and visited network VPLMN). Subsidiary purposes of the invention are: Allow the subscriber to consume mobile services at so-called 'continental' prices when he is in a country within a geographical area that hosts a 'Hub'.

Allow the subscriber to consume local rate mobile telephony services while in his country of residence. Provide the subscriber with a single telephone number, which contains a country identifier that corresponds to his country of residence. In particular, the telephone number is the one associated with the identifier IMSILoc. This telephone number therefore belongs to the network operator HPLMNLoc and not to OPERATEURMON. Advantages of the invention (subscribers side) In roaming, the system according to the invention makes it possible to optimize the costs both for calls received and calls made abroad, as well as data roaming communications. In his home country, the subscriber consumes mobile communication services (voice and data) at local rates.

By subscribing to the HPLMNMON network, the subscriber retains his telephone number, according to the following two options: If his subscription was subscribed with the operator of the HPLMNLoc, a SIM card exchange allows the subscriber to obtain the SIM card Double-1MS 'according to the invention. From the administrative point of view, the SIM card exchange request is provided by the OPERATORmoN as a service provider. If his subscription was subscribed with another operator in his country of residence, the operator of the HPLMNLoc number portability charge; administratively, the portability request is handled by OPERATEURMON as a service provider. Indeed, it is OPERATEURMON which provides to the new subscriber the SIM-Double IMSI card according to the invention.

Advantages of the invention (OPERATORMON side) The OPERATORMON is the service provider vis-à-vis the subscriber. OPERATEURMON's services are marketed in the subscriber's country of residence, where OPERATEURMON has the status of 'MVNO'. OPERATEURMON is responsible for the maintenance and operation of its HPLMNMON network. As such, he has the control of authentication, mobility and signaling for the implementation of any communication of his subscriber, when he is in a situation of roaming. OPERATORmoN markets the services of the operator of the HPLMNLoc network to its subscriber, when he is in his country of residence. The business model described gives OPERATORmoN the following advantages: Number portability: since the service is marketed in the subscriber's country of residence, where the OPERATORmoN is only a reseller (MVNO), it does not therefore has no obligation with respect to portability, the responsibility of which is entirely the responsibility of the operator of the HPLMNLoc network. - Peering agreement for incoming calls. All incoming calls go through a GMSC switch of an operator. In order for each subscriber to be reached from any network, the operator must notify all fixed / mobile operators in all countries of his number range - as well as the Global Title (GT) of his GMSC to be configured in all switches. As indicated in the purpose section of the invention, the telephone number of the subscriber is that associated with the IMSILoc identifier. This number therefore belongs to the operator of the HPLMNLoc network and not to OPERATEURmoN, which therefore has no peering agreement to pass, with the exception of the operator of the HPLMNLoc network as will be explained in the following. the description. DESCRIPTION OF THE INVENTION The present invention relates to a registered mobile system: in a global HPLMNMON network when the mobiles are in a roaming situation in a national HPLMNLoc network when the mobiles are in their country of origin. of mobiles having the following characteristics: - HPLMNMON is composed of a set of subnetworks; each subnet in the set is called 'Hub'. A single cellular operator, referenced OPERATORMON, is responsible for the operation and operation of each Hub of the HPLMNMON; the HPLMNMON's different Hubs communicate with each other through a dedicated physical and logical link that allows the exchange of signaling and data messages (voice, data, SMS, etc.) - The same OPERATORMON is also 'MVNO' on the network HPLMNLoc; - Among HPLMNMON Hubs a 'Main' Hub contains at least one Primary Location Register (HLR), a Gateway-Switch (GMSC), a Gateway-Router (GGSN), a Short Message Processing Center (SMSC) and a CAMEL intelligent platform. - The other HPLMNMON Hubs contain at least one gateway switch (GMSC), a gateway router (GGSN) and a short message processing center (SMSC) - A double IMSI SIM card is inserted in each mobile of the system according to the invention, allowing: o The registration of the mobile national network HPLMNLoc with an IMSILoc that allows the mobile to receive any call or short messages through the use of a first national telephone number o L registering the mobile with one of the hubs of the HPLMNMON global network with an IMSIMON that allows the mobile to receive any call or short messages by using a second telephone number that has the same country ID of the first national telephone number . - The first national telephone number is owned by the operator who owns and operates the national HPLMNLoc network - The second telephone number is owned by OPERATEURMON 15 - The first national telephone number and The second telephone number have the same country identifier . - A signaling gateway (PS), owned by OPERATEURMON, allows a physical and logical interconnection between one of the Hubs of the global network HPLMNMON and HPLMNLoc. In particular, the dual-IMSI SIM card contains: A first set of information, owned by the operator who owns and operates the national network HPLMNLoc, of which: an identification number IMSILoc, a secret key d Kupc authentication and the first national telephone number - A second set of information, owned by the operator OPERATORMON which owns and operates the global HPLMNMON network, of which are included: o An IMSIMON identification number which varies according to the country visited roaming mobile and the value of which allows the registration of the mobile to one of the HPLMNMON Network hub. o A secret KMON authentication key which, unlike the IMSIMON identification number, has a unique value. o A second phone number that has the same country ID of the first national phone number. The PS signaling bridge provides physical and logical interconnection between the HPLMNLoc network and one or more hubs in the HPLMNMON network, allowing routing of signaling between the two networks for control of features such as authentication and registration of the HPLMNLoc network. mobile, mobility management, inbound and outbound call and short message procedures, supplementary services, call forwarding and data communications. The routing of the signaling is carried out by means of a database in which the correspondence between the identification number (variable) IMSImoN and the correspondent IMSILoc and between the first national telephone number and the second telephone number are recorded.

In the system according to the invention, the procedures for registering the mobile in a visited network are carried out according to the following operations: one of the possible values of IMSIMON is activated, allowing the registration of the mobile to one of the Hub of the HPLMNMON network. - The Visited Location Register (VLR) and HPLMNMON Global Location Registry (HLR) exchange authentication and location information. The second telephone number is registered by the visited location register (VLR). - The signaling gateway PS of the global network HPLMNMON reads the value of IMSILoc which corresponds to the active value of IMSIMON. - The HPLMNMON global network PS gateway emulates a Visited Location Register (VLR); a location information exchange is carried out between PS and the home location register (HLR) of the national network HPLMNLoc in order to register the mobile IMSILoc identifier on the PS gateway of the global network HPLMNMON. The first national phone number is registered by the PS gateway. According to another aspect of the invention, at the end of the exchange of location information between the visited location register (VLR) and the main location register (HLR) of the global network HPLMNMON it is the first national telephone number which is registered by the visited location register (VLR).

According to an advantageous characteristic of the invention, the telephone calls to the first national telephone number when the mobile is in a visited network are sent to the gateway-switch (GMSC) of the national network HPLMNLoc, the location of the mobile in the visited network initiating the following operations: - The gateway switch (GMSC) of the national network HPLMNLoc requests from the HLPMNLoc main location register (HLR) the information necessary to route the call to the first national telephone number. - The home location register (HLR) of the national network HPLMNLoc requests the roaming number, corresponding to the mobile IMSILoc identifier, to the signaling gateway PS of the global network HPLMNMON, said gateway emulating a visited location register (VLR). ). - The signaling gateway PS of the global network HPLMNMON refers to the main localization register (HLR) of the national network HPLMNLoc the second telephone number, this second number acting as temporary roaming number (MSRN) for the mobile. The identifier of the visited network switch (VMSC) which is to route the call to the roaming number is also forwarded, said switch being emulated by the signaling gateway PS. - After receiving said information from the HPLMNLoc national home location register (HLR), the national network HPLMNLoc gateway switch (GMSC) returns the call request to the second telephone number to the signaling gateway PS, as the emulator of the visited network switch (VMSC). - In turn, the PS gateway, as the emulator of the visited network switch (VMSC), returns the call request to the gateway-switch (GMSC) of the Hub of the global network HPLMNMON, Hub with which the mobile is registered. - The gateway switch (GMSC) of the HPLMNMON Global Network Hub to which the mobile is registered requests the HPLMNMON global home location register (HLR) for the information necessary to route the call to the second national telephone number. - The HPLMNMON global home location register (HLR) requests the temporary roaming number (MSRN), corresponding to the mobile IMSIMON ID with which the mobile has registered on that Hub, to the visited location register ( VLR) of the network in which the mobile is roaming - The HPLMNMON global home location register (HLR) receives from the visited location register (VLR) the temporary roaming number (MSRN) allocated to the identifier IMSImoN. In addition, the Visited Network Switch Identifier (VMSC) which is to route the call to the MSRN is also forwarded. - After receiving the temporary roaming number (MSRN) from the HPLMNMON Global Location Registry (HLR), the HPLMNMON Global Network Hub-GMSC (GMSC) with which the mobile is registered establishes a call to the visited network switch (VMSC), to the mobile. According to another advantageous characteristic, once received the call request from the PS gateway, as emulator of the visited network switch (VMSC), the gateway-switch (GMSC) of the hub of the global network HPLMNMON from which the mobile is registered requests from the HPLMNMON global location register (HLR) the information necessary to route the call to the first national telephone number which is registered by the visited location register (VLR). According to another advantageous characteristic, the telephone calls from the mobile which is in a visited network trigger an exchange of messages between a visited network switch (VMSC) and a CAMEL-type intelligent platform of the HPLMNMON network so that the latter can instruct the visited network switch (VMSC) to replace the second telephone number with the first national telephone number, which is the only known number in correspondence of the mobile. According to another advantageous characteristic, the short messages (SMS) sent by the mobile which is in a visited network triggering the following operations: - A signaling exchange between a visited location register (VLR) with which the mobile has registered and a visited network switch (VMSC) allows the latter to know the IMSIMON identifier of the mobile with which the mobile has registered on the Hub. - The visited network switch (VMSC) transfers the short message to the Short Message Processing Center (SMSC) of the Hub from which the mobile registered. - An exchange of messages takes place between the SMSC of the Hub with which the mobile has registered and a CAMEL-type intelligent platform of the HPLMNMON network so that the latter can instruct the processing center of the short messages (SMSC) to replace the second telephone number with the first national telephone number, which is the only known number in correspondence of the mobile. - The Short Message Processing Center (SMSC) of the HPLMNMON Global Network Hub with which the mobile is registered sends a request to the gateway switch (GMSC) of the recipient's network for routing information for the short message. .

According to another advantageous characteristic, the short messages (SMS) sent by the mobile which is in a visited network triggering the following operations: - A signaling exchange between a visited location register (VLR) with which the mobile has registered and a visited network switch (VMSC) allows the latter to know the IMSIMON identifier of the mobile with which the mobile has registered on the Hub. - The visited network switch (VMSC) transfers the short message to the Short Message Processing Center (SMSC) of the Hub from which the mobile registered. - The Short Message Processing Center (SMSC) of the HPLMNMON Global Network Hub with which the mobile is registered sends a request to the gateway switch (GMSC) of the recipient's network for routing information for the short message. . According to another advantageous characteristic, the short messages (SMS) to the mobile which is in a visited network and which is identified by the first national telephone number triggering the following operations: - A signaling exchange between the gateway switch (GMSC and the home location register (HLR) of the national network HPLMNLoc allows the gateway switch (GMSC) of the network transmitting the short message to know the routing information for the latter. - The gateway switch (GMSC) of the network transmitting the short message routes it to the PS signaling gateway, as emulator of the visited network switch (VMSC). In turn, the PS gateway requests the HPLMNMON global location register (HLR) for the necessary information to route the short message to the second national telephone number. - The HPLMNMON global home location register (HLR) refers to the PS signaling gateway the routing information, ie the mobile IMSIMON ID with which the mobile registered on the Hub and the address of the visited network switch (VMSC). - The PS gateway, as a short message processing center emulator, carries the short message to the visited network switch (VMSC). - Once received from the visited network switch (VMSC) confirming that the short message has been routed to the mobile, the signaling gateway, as the visited network switch emulator (VMSC), returns - to turn - the same confirmation at the switch-gateway (GMSC) of the national network HPLMNLoc.

According to another advantageous characteristic, the telephone calls to the first national telephone number when the mobile is in a visited network and it is not reachable triggering the following operations: - A message of type `MAP_RESUME-CALL_HANDLING 'is sent since the gateway switch (GMSC) of the HPLMNMON global network hub with which the mobile is registered to the PS signaling gateway, said gateway emulating the visited network switch (VMSC). - The PS signaling gateway reads the value of IMSILoc which corresponds to the active value of IMSIMON. - In turn, the PS gateway sends the message `MAP RESUME-CALLHANDLING '- with parameter IMSILoc - to the gateway-switch (GMSC) of the national network HPLMNLoc so that this gateway-switch (GMSC) can transfer the call to voicemail, which is the first national phone number. According to another advantageous characteristic, any additional service request when the mobile is in a visited network triggering the following operations: a message of type `MAP_REGISTER_SS 'is sent from the visited location register (VLR) of the network in which the mobile is roaming to the gateway switch (GMSC) of the HPLMNMON global network Hub where the mobile is registered. - In turn, the gateway switch (GMSC) of the HPLMNMON global network hub where the mobile is registered returns the message `MAP_REGISTER_SS 'to the PS signaling gateway, said gateway emulating the visited location register (VLR). - The PS signaling gateway reads the value of IMSILoc which corresponds to the active value of IMSIMON. - In turn, the PS gateway sends the message `MAP REGISTER_ SS '- with parameter IMSILoc - to the gateway-switch (GMSC) of the national network HPLMNLoc so that this gateway-switch (GMSC) can transfer the service request additional to the main location register (HLR) of the HPLMNLoc network.

Drawings The present invention will be described below in more detail using an exemplary context (a 'Hub Principal' installed in Belgium, a 'Secondary Hub' installed in Hong Kong, a local network HPLMNLoc deployed in France and of which OPERATORMON is `MVN0 ') and with the aid of an embodiment represented in the appended drawings among which: Figure 1 represents the constituent elements of the network of the invention Figure 2 represents the main elements constituting the card Dual-IMSI SIM according to the invention - Figure 3 shows the interconnection between the HPLMNLoc network and the HPLMNMON network. Figure 4 shows the subscriber registration and location procedure in a visited network - Figure 5 shows the incoming call procedure to the subscriber when in a visited network Figure 6 shows the outgoing call procedure when the subscriber is in a visited network Figure Figure 7 shows the procedure for transmitting a short message when the subscriber is in a visited network. Figure 8 shows the procedure for receiving a short message when the subscriber is in a visited network. the call forwarding procedure (without polling the visited network) when the subscriber is in a visited network Figure 10 shows the call transfer procedure (with polling of the visited network) when the subscriber is in a Figure 11 shows the call transfer procedure (with polling of the visited network and with call attempt) when the subscriber is in a visited network. Figure 12 shows the supplementary service request procedure when the subscriber is in a visited network. subscriber is in a visited network DESCRIPTION OF THE EMBODIMENTS Following the exemplary context described in the field part of the invention, FIG. the invention: a subnet 'Hub 20 Main' (10) is deployed in Belgium by OPERATEURMON. The devices that are part of the subnet (10) are a `Mufti-IMS1 'HLR (101), a GMSC (102), an SMSC (103), a GGSN (104) and a CAMEL (105) platform that implements any logic necessary for the operation of the Service Control Function (SCF). The subnetwork (10) is attached to the international SS7 signaling network (not shown in FIG. 1) in order to exchange any signaling message for the routing of calls or short messages from / to the visited mobile networks. The subnetwork (10) is also attached to the international GRX interconnection network (not shown in FIG. 1) in order to exchange any signaling message for the routing of data sessions from / to the mobile networks visited. The subnetwork (10) has roaming agreements with any network visited in a country of the European Community. HPLMNMON subscribers (whose subnet (10) is a member) use dual-IMSI SIM cards (150). If a subscriber is roaming in a country of the European Community, the IMSI 'main' IMSIp (160) (part of the IMSIMON identifier set) is activated in the SIM card (150); the following attributes (160) are attached to the subscriber: A Belgian IMSIp-BE 'main' IMSI, starting with the 3 digits '206' (MCC identifier for Belgium) A MSISDN French MSISDNFR, starting with the 2 digits '33 '(telephone identifier of France). Note: MSISDNFR is part of a set of MSISDN allocated to OPERATEURMON by the Telecommunication Regulatory Authority of the country in which the HPLMNLoc network is deployed. According to the exemplary context mentioned, the HPLMNLoc local network is deployed in France. SIM cards (150) with attributes (160) are stored in the HLR `Multi-IMSI '(101). Still according to FIG. 1, the system according to the invention also consists of a sub-network 'Secondary Hub' (20), deployed in Hong Kong by OPERATORMON: in effect, the 'Main Hub' (10) and the Secondary Hub '(20) are part of the same HPLMNMON. The equipment that is part of the subnet (20) is a GMSC (202) and a GGSN (204). The subnet (20) is attached to the international SS7 signaling network (not shown in Figure 1) to exchange any signaling message for the routing of calls or short messages from / to the visited mobile networks. The subnetwork (20) is also attached to the international GRX interconnection network (not shown in FIG. 1) in order to exchange any signaling message for the routing of data sessions from / to 25 mobile networks visited. The subnet (20) has roaming agreements with any network visited in a country in the Asia-Pacific region. HPLMNMON subscribers (whose subnet (20) is a part) use dual-IMSI '(150) SIM cards. If a subscriber is roaming in a country in the Asia-Pacific region, the IMSI 'secondary' IMSI (260) (part of the IMSIMON identifier set) is activated in the SIM card (150); the following attributes (260) are attached to the subscriber: - A 'secondary' IMSI of Hong Kong IMSIs-HK, starting with the 3 digits '454' (MCC identifier for Hong Kong) A French MSISDN MSISDNFR, starting with the 2 figures '33' (telephone identifier of France). This MSISDNFR is always the same for the roaming subscriber, regardless of the IMSI (IMSIR_ BE or IMS1s-F10- The SIM cards (150) with the attributes (260) are stored in the HLR `Multi-IMSI '(101). In this exemplary context, it can thus be decided that each subscriber of the HPLMNMON which is roaming corresponds to either the 'European' identifier (160) (IMSIp_BE, MSISDNFR) or that of Hong Kong (260) (IMSIs-HK, MSISDNFR) Depending on the country visited, the HLR 'Multi-IMSI' (101) knows the correspondence (in terms of IMSI and MSISDN) between the identifiers (160) and (260) The subnetworks (10) and (20) ) must configure the GMSC table E.214 (102) (and respectively (202)) so that the received signaling corresponding to the identifiers (160) (and respectively (260)) is directed to the HLR 'Multi-IMSI' ( 101) The two Hubs (10) and (20) of the HPLMNMON are connected to each other by dedicated lines Figure 1 shows the logical connections (at protocol level e t / or services): The dotted line (60) denotes a connection according to the MAP protocol, defined in 3GPP TS 09.02: 3rd Generation Partnership Project; Technical Specification Group Core Network; Mobile Application Part (MAP) specification (Release 1998) and according to the CAP protocol, defined in 3GPP TS 03.78: 3rd Generation Partnership Project; Technical Specification Group Core Network; Customized Applications for Mobile Network Enhanced Logic (CAMEL) Phase 2; Stage 2 (Release 1998) The continuous line (70) denotes a connection according to the ISUP protocol, defined in the ITU-T Q.76x series of standards. From the point of view of packet-switched networks, all 'Hub' is an Autonomous System (AS). Still according to FIG. 1, the system according to the invention also consists of the HPLMNLoc network (30) belonging to the French MNO which "hosts" the OPERATORMON as 'MVNO' (which is also - MNO or 'Full MVNO'). subnets (10) and (20)). Among the devices that form part of the network (30) there are: an HLR (301), a GMSC (302), an SMSC (303) and a GGSN (304) which are represented.

OPERATEURMON (French) subscribers use Double-IMSI '(150) SIM cards. If they are in France, the IMSILoc identifier is activated in the SIM cards (150); the following attributes (360) are attached to the subscriber: A French IMSILoc, starting with the 3 digits' 208 '(MCC identifier for France) A MSISDN French MSISDNFR-Loc, starting with the 2 digits `33' (telephone identifier from France). Note: MS1SDNFR-Loc is the number assigned to the subscriber by the operator of HPLMNLoc (30) through a simple activation or activation procedure with portability.

MSISDNFR-Loc is the only number known to the subscriber; it is also the only number that must be dialed in order to reach the subscriber, wherever he is (in France or while roaming). SIM cards (150) with attributes (360) are stored in the HLR (301).

A signaling gateway (50) connects the HPLMNLoc network (30) to the HPLMNMON network (and its constituent hubs (10) and (20)). This link is established through the French SS7 national signaling network according to the logical connections (protocol level and / or services) (60) and (70).

The signaling gateway (50) can be deployed in France or Belgium or Hong Kong by OPERATEURMON. In the following description, it will be assumed that the signaling gateway (50) is deployed in France. The configuration of the gateway (50) (explained later) allows 'chain' calls and SMS to the subscriber when it is roaming. Following the exemplary context described in the scope part of the invention, FIG. 2 represents the functional structure of the SIM-IMSI SIM card: A first set of information (151) is implanted in the SIM card (150) during a so-called customization phase immediately following the manufacture of the SIM card (150). This information set contains at least a couple of pieces of information: The IMSILoc identification number (360), which is part of the GSM directory of the information set (151) A secret authentication key KLoc which is part of the game information (151) but which is not included in the SIM card file structure, as it must not be accessible by input / output commands. Also included in the first set of information (151) is the MSISDN French MSISDNFR-Loc. This parameter is part of the Telecom directory of the information set (151). The first information set (151) is entirely under the control of the French MNO 15 which owns and operates the HPLMNLoc network (30) and which "hosts" the MVNO operator OPERATORMON. The first information set (151) is active when the subscriber is in France (country of residence). Any authentication, localization, etc. is managed and controlled by the HLR (301) of the HPLMNLoc network. A second information frame (152) is implanted in the SIM card (150) during the personalization phase. This second set of information comprises at least one pair of information items: A set of IMSIMON identification numbers (160) and (260), which respectively correspond to the Belgian 'main' IMSI IMSIR_BE and to the IMSI ` Hong Kong IMSIs_FIK which are part of the GSM directory of the information set (152). A secret KMON authentication key which is part of the information set (152) but which is not included in the SIM card file structure, since it must not be accessible by input commands / exit. The KMON key is unique to the set of IMSIMON identification numbers (160) and (260). Also included in the second set of information (152) is the MSISDN French MSISDNFR. This parameter is part of the Telecom directory of the information set (152).

The second set of information (152) is entirely under the control of the OPERATORMON. The second information set (152) is active when the subscriber is roaming. Any authentication, localization, etc. is managed and controlled by the HLR (101) of the HPLMNMON network. According to one possible embodiment, there is only one IMSI that can be registered (for example, the IMSIp_BE, the Belgian 'main' IMSI) in the second information set (152). Depending on the location of the subscriber, the Hong Kong IMSI 'secondary' IMSIB_HK can be downloaded to the mobile by radio. 10 Following this download, the IMSIB_HK Hong Kong IMSI can replace the IMSIp-BE IMSIp-BE. Conversely, still depending on the location of the subscriber, the Belgian IMSI 'main' IMSIp_BE can be downloaded and replace the Hong Kong IMSI 'secondary' IMSIE-HK. This downloading by radio is carried out in a manner known to those skilled in the art, for example according to the technique of short messages, in particular according to the DTA protocol. Following the exemplary context described in the Domain portion of the invention, Figure 3 shows the interconnection between the HPLMNLoc network (30) and the 'Main Hub' (10) of the HPLMNMON network. The signaling gateway (50) interconnects the GMSC (302) of the HPLMNLoc network (30) and the GMSC (102) of the 'Main Hub' (10) of the HPLMNMON network. The interconnection is at a physical and logical level: SCCP routing on the SS7 network Exchange of signaling of MAP and ISUP applications on the SS7 network The functional structure of the signaling gateway (50) is also shown in FIG. according to the following components: An element (501) which converts the SCCP address between the input and output interfaces of the signaling gateway (50) An element (502) which converts the MAP level parameters between signaling gateway input and output interfaces (50) A MAP server (503) that instantiates any MAP process - An ISUP server (504) that instantiates any ISUP process A persistent database (505) of which each element is created to the act of provisioning a subscriber. In particular, each element of the base (505) maintains a correspondence between the telephone number MSISDNFR_Loc of the subscriber and the corresponding number MSISDNFR (unknown by the subscriber). Similarly, each element of the base (505) maintains a correspondence between the IMSILoc identification number (360) of the subscriber and the set of identification numbers IMSIMON (160) and (260). A temporary database (506) in which each element is created and dynamically erased, in order to store information such as subscriber location, call forwarding, etc. A temporary database (507) of which each item is created and dynamically deleted, for storing the SCCP address transformation information for each active transaction at MAP or ISUP level. - A temporary database (508) of which each item is created and dynamically deleted, in order to store the subscriber's communications information.

Configuring the system according to the invention In order for the operational procedures (explained later) to work correctly, the following configuration steps are necessary: System requirements in the HPLMNLoc network (30) ISUP signaling to any number MSISDNFR ( which is part of a set of MSISDN allocated to OPERATEURMON by the Telecommunication Regulatory Authority of the country in which the HPLMNLoc network is deployed) must be routed to a GT-PS-VMSC referenced GT. In fact, vis-à-vis the ISUP signaling of the HPLMNLoc network (30) to the HPLMNMON network, the signaling gateway (50) emulates the behavior of a VMSC. Requirements in the signaling gateway (50) A set of GT addresses and (at least) a `Signaling Point Code '(SPC) must be reserved for the signaling gateway (50) so that it can emulate the behavior different equipment vis-à-vis the HPLMNLoc network.

The following GT addresses must be configured (note: the 'TT' parameter is zero as an example): `Translation Type '(TT) = 0,` Numbering Plan' (NP) = 7 (E.214 ), `SubSystem Number '(SSN) = 6 (HLR) Allows the signaling gateway (50) to emulate an HLR in MAP services such as' Location Update', 'Authentication', and so on. TT = 0, NP = 1 (E.164), SSN = 7 (VLR) Enables the signaling gateway (50) to emulate a VLR in MAP services such as 'Location Update', 'Authentication', and so on. TT = 0, NP = 1 (E.164), SSN = 8 (MSC-MAP) / (GMSC-MAP) / (IWMSC-SMSC) Allows the signaling gateway (50) to emulate an MSC or GMSC or an IWMSC in MAP and ISUP services such as requests / responses to a destination number Required HPLMNMON Network Requirements (10, 20) The GSMC (102), (202) must configure their routing tables for any message having a ` Called Party Address' (CdPA) which corresponds to the GT configured in the signaling gateway (50) Differences between the patent WO 2005/018245 A2 and the present invention The patent WO 2005/018245 A2 describes a signaling gateway which offers a so-called `Multi-IMSI, Multi-MSISDN 'between partner operators. The purpose of this service is to reduce roaming communications costs for the subscribers of one of the partner operators. The concepts set forth in WO 2005/018245 A2 can be applied only if each partner operator has control over its own IMSI, i.e. whether it is MNO or 'Full MVNO'. In the present invention, the Double-IMS1 'service is marketed to subscribers of an MVNO, which has no control over the IMSILOC (360) and which, on the other hand, has control of the IMSIMON set (160). ) and (260) because it is Full MVNO on the HPMNMON network. According to the patent WO 2005/018245 A2 a subscriber who benefits from the service `Multi-IMSI, Multi-MSISDN 'has, at his disposal, a plurality of MSISDN number, which allows him to make communications at local rates in the countries of the partner operators. According to the present invention, only the local number is available to the subscriber, the numbers allocated to the OPERATORMON being a means of routing all communications to the subscriber when he is in a roaming situation. These differences - in the business model - lead to substantial differences in architecture and operational procedures, as explained below.15 Operational Procedures Preamble The rest of the description below explains the synoptics corresponding to the following: different procedures (authentication, mobility, call control, etc.). In general, the different steps of the synoptics describe the messages exchanged between a source equipment and a destination equipment. Each message is represented at its application layer (MAP, ISUP, CAP) and its interconnection layer (SCCP and / or MTP), according to the following formalisms: For MAP and CAP applications: MAP_APPLICATION_ID (or CAP_APPLICATION_ID) (Parameters) SCCP CdPA: (GT, SSN, TT) - SCCP CgPA: (GT, SSN, TT) For ISUP applications: 15 ISUP MESSAGE (Parameters) DPC - OPC Where: - CdPA, CgPA: GT addresses of the recipient and transmitter equipment, respectively 20 - CPD, OPC: Point Code (PC) of the destination and transmitter equipment, respectively Subscriber registration and location procedures in a network visited within the European Community - role of the HPLMNMON 'Main Hub' (10) Figure 4 details equipment and message exchanges to provide the registration and location procedures on the subnetwork (10) and the network (30). The subscriber activates his mobile (40). This activation triggers: 1. (Step 1, Figure 4) A `MAP_SEND_AUTHENTICATIONINFO 'signaling message is sent from the VLR-V of the visited network to the HLR (101) of the subnet (10). The syntax and parameters of the `MAP_SEND_AUTHENTICATIONINFO 'message are defined in 3GPP TS 09.02: 3rd Generation Partnership Project; Technical Specification Group Core Network; Mobile Application Part (MAP) specification (Release 1998). The message is routed to the HLR (101) through the GMSC (102) and the signaling gateway (50). The main parameters of this message are: At the MAP level: the Belgian IMSI 'main' IMSIp_BE (the subscriber is roaming in a country of the European Community) At the SCCP level: - Address GT of emission: VLR-V (E.164 number), SSN = 7 (VLR-V), TT = 0 - GT destination address: MGTp_BE (E.214 number derived from the Belgian 'main' IMSI IMS1p_BE), SSN = 6 (the HLR ( 101)), TT = 0 2. (Step 2, Figure 4) A message message `MAP_SEND_AUTHENTICATIONINFO_ACK 'is sent from the HLR (101) of the subnet (10) to the VLR-V of the visited network. The syntax and parameters of the `MAP SEND AUTHENTICATION INFO ACK 'message are defined in the _ _ _ 3GPP standard TS 09.02: 3rd Generation Partnership Project; Technical Specification Group Core Network; Mobile Application Part (MAP) specification (Release 1998). The message is routed to the VLR-V through the GMSC (102) and the signaling gateway (50). The main parameters of this message are: At the MAP level: the IMSIp_BE Belgian 'main' IMSI, and the authentication parameters (RAND and SRES). SRES was calculated by the HLR (101) with the KMON secret authentication key. At SCCP level: - Transmission GT address: HLR (E.164 number), SSN = 6 (HLR (101)), TT = 0 - GT destination address: VLR-V (E.164 number), SSN = 7 (VLR-V), TT = 0 3. (Step 3, Figure 4) A message exchange of the type MM_AUTHENTIFICATION_REQUEST / REPONSE is performed between the mobile and the VLR-V. The mobile returns the SRES result of the authentication procedure. SRES 'was calculated with the KMON secret authentication key. If SRES = SRES 'go to the next step. 4. (Step 4, Figure 4) A MAP UPDATELOCATION (LU) signaling message is sent from the VLR-V of the visited network to the HLR (101) of the subnet (10). The syntax and parameters of the `MAP_UPDATELOCATION 'message are defined in 3GPP TS 09.02: 3rd Generation Partnership Project; Technical Specification Group Core Network; Mobile Application Part (MAP) specification (Release 1998). The message is routed to the HLR (101) through the GMSC (102) and the signaling gateway (50). The main parameters of this message are: At the MAP level: the Belgian 'main' IMSI IMSIp_BE (the subscriber is roaming in a country of the European Community) At the SCCP level: 15 - Address GT of emission: VLR- V (E.164 number), SSN = 7 (VLR-V), TT = O - GT destination address: MGTp_BE (E.214 number derived from the Belgian main IMSI IMSIp_BE), SSN = 6 (the HLR (101)), TT = 0 5. (Step 5, Figure 4) The signaling gateway (50) reads the value of the IMSIp_BE Belgian 'main' IMSI. With its database (505) (described in Figure 3) the gateway (50) can derive the identification number IMSILoc (360). 6. (Step 6, Figure 4) an INSERT SUBSCRIBER DATA (ISD) signaling message is sent from the HLR (101) of the subnet (10) to the VLR-V of the visited network. This message is sent in response to the message 'MAPLOCATION_UPDATE' in step 4. With this message, the VLR-V controlling the subscriber knows the profile of the subscriber, in particular the telephone identifier MSISDNFR allocated to the OPERATORmoN . The syntax and parameters of the 'INSERT SUBSCRIBER DATA' message are defined in 3GPP TS 09.02: 3rd Generation Partnership Project; Technical Specification Group Core Network; Mobile Application Part (MAP) specification (Release 1998). The main parameters of this message are: At the MAP level: the MSISDNFR telephone identifier allocated to the OPERATORMON At the SCCP level: - Transmission GT address: HLR (101) (E.164 number), SSN = 6 (the HLR (101)), TT = 0 - GT destination address: VLR-V (E.164 number), SSN = 7 (VLR-V), TT = 0 7. (Step 7, Figure 4) a signaling message MAP UPDATE LOCATION '(LU) is sent from the signaling gateway (50) of the subnet (10) to the HLR (301) of the network (30). The purpose of this message is to display the IMSILoc identification number (360) as being registered in a VLR of the subnet (10). In this sense, the signaling gateway (50) must appear as a VLR vis-à-vis the network (30). This is possible thanks to the configuration of the signaling gateway (50) explained above. The syntax and parameters of the `MAP UPDATE LOCATION 'message are defined in 3GPP TS 09.02: 3rd Generation Partnership Project; Technical Specification Group Core Network; Mobile Application Part (MAP) specification (Release 1998). The message is routed to the HLR (301) through the GMSC (302) (not shown in Figure 4). The main parameters of this message are: At the MAP level: - The IMSI 'local' IMSILoc (360) - The GT address of the signaling gateway (50) as an emulator of a VLR; this address is referenced GT-PSVLR in Figure 4 - The GT address of the signaling gateway (50) as an emulator of a VMSC; this address is referenced GT-PS-VMSC in Figure 4 At the SCCP level: - Transmission GT address: GT-PS-VLR (E.164 number), SSN = 7, TT = 0 2 9866 85 29 - GT address destination: MGTLoc (E.214 number derived from the IMSI 'local' French IMSILoc), SSN = 6 (the HLR (301)), TT = 0 8. (Step 8, Figure 4) a signaling message 'INSERT SUBSCRIBER DATA '(ISD) is sent from the HLR (301) of the network (30) to the signaling gateway (50) of the subnet (10) (the gateway emulating a VLR as explained in step 7. ). This message is sent in response to the `MAP LOCATION UPDATE 'message in step 7. With this message, the VLR which controls the subscriber in the subnet (10) knows the profile of the subscriber (10), in particular the telephone identifier MSISDNFR-Loc allocated to the subscriber in the HPLMNLoc network. The syntax and parameters of the 'INSERT SUBSCRIBER DATA' message are defined in 3GPP TS 09.02: 3rd Generation Partnership Project; Technical Specification Group Core Network; Mobile Application Part 15 (MAP) specification (Release 1998). The main parameters of this message are: At the MAP level: the MSISDNFR_Loc telephone identifier allocated by the HPLMNLoc network operator At the SCCP level: 20 - Transmission GT address: HLR (301) (E.164 number), SSN = 6 (HLR (301)), TT = 0 - GT destination address: GT-PS-VLR (E.164 number), SSN = 7, TT = 0 Registration and location procedures on the 25-bit network packet switching (GPRS) are very similar and will not be described. Note: Subscriber registration and location procedures in a network visited within the Asia-Pacific region and - consequently - the role of the 'Sub-Hub' (20) of HPLMNMON are almost identical. The 30 step-by-step differences are as follows: 1. (Step 1, Figure 4) The `MAP_SEND_AUTHENTICATIONINFO 'signaling message sent from the VLR-V of the visited network to the HLR (101) is routed through the GMSC (202) and the signaling gateway (50). The main parameters of this message are: At the MAP level: the IMSI 'secondary' IMSIs_HK (the subscriber is roaming in a country in the Asia-Pacific zone) At the SCCP level: - Transmit GT address: VLR- V (E.164 number), SSN = 7 (VLRV), TT = 0 - GT destination address: MGTs_HK (E.214 number derived from the IMSI 'secondary' IMSIs_HK), SSN = 6 (the HLR (101) ), TT = 0 2 (Step 2, Figure 4) the message message `MAP_SEND_AUTHENTICATIONINFOACK ', sent from the HLR (101) of the subnet (10) to the VLR-V of the visited network is routed through the GMSC ( 202) and the signaling bridge (50). The main parameters of this message are: At MAP level: IMSI 'secondary' IMSIs_HK, and authentication parameters (RAND and SRES). SRES was calculated by the HLR (101) with the KMON secret authentication key. At the SCCP level: no differences 3. (Step 3, Figure 4) No differences. 4. (Step 4, Figure 4) The MAP UPDATE LOCATION (LU) signaling message sent from the VLR-V of the visited network to the HLR (101) of the subnet (10) is routed through the GMSC (202) and the signaling bridge (50). The main parameters of this message are: At the MAP level: IMSIs_HK 'Secondary' IMSIs At SCCP level: - Transmission GT address: VLR-V (E.164 number), SSN = 7 (VLRV), TT = 0 - GT destination address: MGTs_HK (E.214 number derived from the IMSI 'secondary' IMSIs_HK), SSN = 6 (the HLR (101)), TT = 0 5. (Step 5, Figure 4) The signaling gateway (50) reads the value of IMSI 'secondary' IMSIs_HK. With its database (505) (described in Figure 3) the gateway (50) can derive the identification number IMSILoc (360). 2. (Step 6, Figure 4) No differences 7. (Step 7, Figure 4) No differences 8. (Step 8, Figure 4) No differences Also note: Thanks to Step 6 ("INSERT SUBSCRIBER DATA" (ISD)) it is possible to push in the VLR-V of the visited network any MSISDN which can allow advantages in terms of the functional behavior of the system and / or the advantages in terms of price for calls. issued or received. An exemplary case may be cited: The telephone identifier MSISDNFR-Loc belonging to the French operator 10 which owns and operates the HPLMNLoc network (30) is part of the parameters of the message 'INSERT SUBSCRIBER DATA' (ISD). It will be shown later that in this case it is possible to simplify the call procedures issued by the roaming subscriber. Subscriber registration and localization procedures in the HPLMNLoc local network in France In this case, there is no impact on the HPLMNMON network (10). Indeed, the authentication and localization procedures are controlled by the HPLMNLoc network (30), since it is the IMSILoc identifier (360) which is active on the dual-IMSI SIM card (150). From the operational point of view, no message passes through the signaling gateway (50). As 'MVNO' the OPERATORMON acts as reseller of voice / data / SMS communications. With regard to international calls (from France to abroad), the call signaling could be routed via the signaling gateway (50), according to the agreements between the French MNO which "hosts" the operator ` MVNO 'OPERATORMON and the latter. Incoming call procedures to the subscriber when he is in a network 30 visited within the European Community - role of the HPLMNMON 1-lub Principal (10) Figure 5 details the equipment and the exchange of messages in order to to ensure the correct progress of the incoming call when the subscriber is roaming in a country of the European Community.

The subscriber activates his mobile (40). This activation triggers: 1. (Step 1, Figure 5) An ISUP IAM message is sent to the GMSC (302) of the HPLMNLoc network (30). Indeed, the telephone identifier MSISDNFR-Loc is the only one known. The syntax and parameters of the `ISUP IAM 'message are defined in the ITU-T Q.76x series of standards. The main parameters of this message are: At the ISUP level: the telephone identifier MSISDNFR-Loc 2. (Step 2, Figure 5) a message message MAP SENO ROUTING INFORMATION is sent from the GMSC (302) to the HLR ( 301) of the network (30). The syntax and parameters of the `MAP_SEND_ROUTING_INFORMATION 'message are defined in 3GPP TS 09.02: 3rd Generation Partnership Project; Technical Specification Group Core Network; Mobile Application Part (MAP) specification (Release 1998). The main parameters of this message are: At the MAP level: the telephone identifier MSISDNFR-Loc. At the SCCP level: - Transmission GT address: GMSC (E.164 number), SSN = 8 (GMSC (302)), TT = 0 - GT destination address: MSISDNFR-Loc (E.164 number), SSN = 6 (the HLR (301)), TT = 0 3. (Step 3, Figure 5) A MAP PROVIDE ROAMING NUMBER message is sent from the HLR (301) of the network (30) to the signaling gateway (50) as an emulator of a VLR; indeed, as explained in FIG. 4 (step 7), the identification number IMSILoc (360) appears as being registered in a VLR of the HPLMNMON network. The syntax and parameters of the `MAP_PROVIDE_ROAMING_NUMBER 'message are defined in 3GPP TS 09.02: 3rd Generation Partnership Project; Technical Specification Group Core Network; Mobile Application Part (MAP) specification (Release 1998). The main parameters of this message are: At MAP level: IMSI 'local' IMSILoc (360). At the SCCP level: 2 9866 85 33 - Transmission GT address: HLR (E.164 number), SSN = 6 (the HLR (301)), TT = 0 - GT destination address: GT-PS-VLR (number E.164), SSN = 7, TT = 0 (the GT address of the signaling gateway (50) as an emulator of a VLR) 4. (Step 4, Figure 5) a signaling message MAP PROVIDE ROAMING NUMBERACK 'is returned from the signaling gateway (50) as an emulator of a VLR to the HLR (301) of the network (30). The syntax and parameters of the MAP PROVIDE ROAMING NUMBERACK message are defined in 3GPP TS 09.02: 3rd Generation Partnership Project; Technical Specification Group Core Network; Mobile Application Part (MAP) specification (Release 1998). The main parameters of this message are: At the MAP level: The MSISDNFR telephone identifier belonging to the OPERATORmoN and fixedly assigned to the subscriber. This identifier acts as Mobile Station Roaming Number (MSRN); it is always the same regardless of the geographical location of the subscriber. - The GT address of the VMSC of destination: GT-PS-VMSC (the GT address of the signaling gateway (50) as emulator of a VMSC) At the SCCP level: 25 - Transmission GT address: GT-PS-VLR (E.164 number), SSN = 7, TT = 0 (the GT address of the signaling gateway (50) as a VLR emulator) - GT destination address: HLR ( E.164), SSN = 6 (HLR (301)), TT = 0 5. (Step 5, Figure 5) A MAP SEND ROUTING INFORMATIONACK message is returned from the HLR (301) to the GMSC (302) of the network (30). The syntax and parameters of the `MAP SEND ROUTING INFORMATIONACK 'message are defined in 3GPP TS 09.02: 3rd Generation Partnership Project; Technical Specification Group Core Network; Mobile Application Part (MAP) specification (Release 1998). The main parameters of this message are: At MAP level: routing information. In this case, it is the MSISDNFR telephone identifier, as MSRN. At SCCP level: - Transmission GT address: HLR (E.164 number), SSN = 6 (HLR (301)), TT = 0 - GT destination address: GMSC (E.164 number), SSN = 8 (GMSC (302)), TT = 0 6. (Step 6, Figure 5) An ISUP IAM message is sent from the GMSC (302) of the HPLMNLoc network (30) to the signaling gateway (50) as a emulator of a VMSC. In turn, the signaling gateway (50) relays this same message to the GMSC (102) of the 'main' hub (10) of the HPLMNMON network. The main parameters of this message are: At the ISUP level: the MSISDNFR telephone identifier (obtained by the HLR (301) in the previous step) At the MTP level (between the GMSC (302) and the signaling gateway (50)) - 'Point Code' (PC) issue: the GMSC PC (302) referenced GMSC-PC - PC destination: the PC signaling gateway (50) referenced PS-PC. Note: As explained in the section Requirements in the signaling gateway (50), at least one PC must be reserved for it. It is assumed here that all the functionalities of the signaling gateway (50) are implemented in a single physical device; In this case, only one PC is needed. At the MTP level (between the signaling gateway (50) and the GMSC (102)): 2 9 866 85 - 'Point Code' (PC) transmission: the PC of the signaling gateway (50) referenced PS-PC . - PC of destination: the GMSC PC (102) referenced GMSC-PC. 7. (Step 7, Figure 5) A 5% AAP SEND ROUTING INFORMATION 'signaling message is sent from the GMSC (102) to the HLR (101) of the' Main 'Hub (10) of the HPLMNMON network. The main parameters of this message are: At the MAP level: the MSISDNFR telephone identifier. At the SCCP level: 10 - Transmission GT address: GMSC (E.164 number), SSN = 8 (GMSC (102)), TT = 0 - GT destination address: MSISDNFR (E.164 number), SSN = 6 (the HLR (101)), TT = 0 8. (Step 8, Figure 5) a MAP PROVIDE ROAMING NUMBER signaling message is sent from the HLR (101) of the 'main' hub (10) of the network. HPLMNMON to the VLR-V of the visited network. The main parameters of this message are: At the MAP level: the Belgian 'main' IMSI IMSIR_BE (160) (part of the set of IMSIMON identifiers). At the SCCP level: - Transmission GT address: HLR (E.164 number), SSN = 6 (the HLR (101)), TT = 0 - GT destination address: VLR-V (E.164 number), SSN = 7, TT = O 9. (Step 9, Figure 5) A MAP PROVIDE ROAMING NUMBERACK message is returned from the VLR-V of the visited network to the HLR (101) of the 'Main' hub (10). ) of the HPLMNMON network. The main parameters of this message are: At the MAP level: 30 - The temporary Mobile Station Roaming Number (MSRN) allocated by the VLR-V. - The GT address of the destination VMSC-V, in the visited network At the SCCP level: 2 9866 85 36 - Transmission GT address: VLR-V (E.164 number), SSN = 7, TT = 0 - Address Destination GT: HLR (E.164 number), SSN = 6 (HLR (101)), TT = 0 5 10. (Step 10, Figure 5) A% AAP SEND ROUTING INFORMATIONACK 'signaling message is returned from the HLR (101) to the GMSC (102) of the 'main' hub (10) of the HPLMNMON network. The main parameters of this message are: At MAP level: routing information. In this case, it is the MSRN of step 9. At the SCCP level: - Transmission GT address: HLR (E.164 number), SSN = 6 (the HLR (101)), TT = 0 - Destination GT address: GMSC (E.164 number), SSN = 8 (GMSC (102)), TT = 0 11. (Step 11, Figure 5) An ISUP IAM message is sent from the GMSC (102) from the 'main' hub (10) of the HPLMNMON network to the VMSC-V of the visited network. At the ISUP level the main parameter of this message is the MSRN obtained in step 9. Note: incoming call procedures when the subscriber is in a visited network within the Asia-Pacific area and - by Therefore - the role of the 'Secondary Hub' (20) of HPLMNMON are almost identical. The differences, step-by-step, are as follows: 1. (Step 1, Figure 5) No differences. 2. (Step 2, Figure 5) No differences. 3. (Step 3, Figure 5) No differences. 4. (Step 4, Figure 5) No differences. 5. (Step 5, Figure 5) No differences. 6. (Step 6, Figure 5) An ISUP IAM message is sent from the GMSC (302) of the HPLMNLoc network (30) to the signaling gateway (50) as an emitter of a VMSC. In turn, the signaling gateway (50) relays this same message to the GMSC (202) of the 'secondary' hub (20) of the HPLMNMON network. The main parameters of this message are: At the ISUP level: the MSISDNFR telephone identifier (obtained by the HLR (301) in step 5) At the MTP level (between the GMSC (302) and the signaling gateway (50)) : - `Point Code '(PC) issue: the GMSC PC (302) referenced GMSC-PC - PC destination: the PC signaling gateway (50) referenced PS-PC. At the MTP level (between the signaling gateway (50) and the GMSC (202)): - `Point Code '(PC) transmission: the PC of the signaling gateway (50) referenced PS-PC. - PC of destination: the GMSC PC (202) referenced GMSC-PC. 7. (Step 7, Figure 5) A message MAP SEND ROUTING INFORMATION message is sent from the GMSC (202) of the 'Secondary' Hub (20) of the HPLMNMON network to the HLR (101) of the 'Main' Hub ( 10) of the HPLMNMON network. The main parameters of this message are: At the MAP level: the MSISDNFR telephone identifier.

At SCCP level: - Transmission GT address: GMSC (E.164 number), SSN = 8 (GMSC (202)), TT = 0 - GT destination address: MSISDNFR (E.164 number), SSN = 6 (HLR (101)), TT = 0 8. (Step 8, Figure 5) a message message `MAP_PROVIDE_ROAMING_NUMBER 'is sent from the HLR (101) of the` Main' Hub (10) of the HPLMNMON network to the VLR- V of the visited network. The main parameters of this message are: At the MAP level: the Hong Kong IMSI `secondary 'IMSIs_HK (260) (part of the IMSIMON identifier set). At the SCCP level: - Transmission GT address: HLR (E.164 number), SSN = 6 (the HLR (101)), TT = 0 2 9866 85 38 - GT destination address: VLR-V (E number. 164), SSN = 7, TT = 0 9. (Step 9, Figure 5) A MAP PROVIDE ROAMING NUMBER_ACK message is returned from the VLR-V of the visited network to the HLR (101) of the main hub. '(10) of the HPLMNMON network. The main parameters of this message are: At MAP level: - The temporary mobile phone roaming number (MSRN) assigned by the VLR-V. 10 - The GT address of the destination VMSC-V, in the visited network At the SCCP level: - Transmission GT address: VLR-V (E.164 number), SSN = 7, TT = 0 - Destination GT address : HLR (E.164 number), SSN = 6 (HLR (101)), TT = 0 10. (Step 10, Figure 5) A MAP SEND ROUTING INFORMATIONACK message is returned from the HLR (101 ) from the 'main' hub (10) of the HPLMNMON network to the GMSC (202) of the 'secondary' hub (20) of the HPLMNMON network. The main parameters of this message are: MAP level: routing information. In this case, it is the MSRN of step 9. At the SCCP level: - Transmission GT address: HLR (E.164 number), SSN = 6 (the HLR 25 (101)), TT = 0 - GT destination address: GMSC (E.164 number), SSN = 8 (GMSC (202)), TT = 0 11. (Step 11, Figure 5) An ISUP IAM message is sent from the GMSC (202) of the 'Secondary' hub (20) of the HPLMNMON network to the VMSC-V of the visited network. At the ISUP level, the main parameter of this message is the MSRN obtained in step 9. 2 9 866 85 39 Outbound call procedures when the subscriber is in a visited network within the European Community - role of the 'Hub HPLMNMON Main '(10) Figure 6 details the equipment and the message exchanges to ensure the correct operation of the outgoing call when the subscriber is roaming in a country of the European Community. 1. (Step 1, Figure 6) Following receipt of an outgoing call request from the subscriber's telephone (40), the VMSC-V of the visited network sends a signaling message 'CAP_ 10 INITIAL DETECTION POINT 'to the' Service Control Function '(105) of the' main 'hub (10) of the HPLMNmoN network. It is necessary that the VMSC-V supports CAMEL (at least Phase 1) and that the Originating CAMEL Subscription Information (O-CSI) is part of the parameters that have been sent within the MAP INSERTSUBSCRIBER DATA message. Step 6, Figure 4) so that the VMSC-V can know the address of the Service Control Function (105). The syntax and parameters of the 'CAP_INITIAL DETECTION POINT' message are defined in 3GPP TS 03.78: 3rd Generation Partnership Project; Technical Specification 20 Group Core Network; Customized Applications for Mobile Network Enhanced Logic (CAMEL) Phase 2; Stage 2 (Release 1998). The main parameters of this message are: At CAP level: - the Belgian 'main' IMSI IMSIp_BE (160) (part of the set of IMSIMON identifiers). - The MSISDNFR telephone identifier belonging to the OPERATORmoN. It is this number which was sent to the VLR-V of the visited network among the parameters of the `MAP INSERTSUBSCRIBER DATA 'message (Step 6, Figure 4). At the SCCP level: - Transmission GT address: VLR-V (number E.164), SSN = 7, TT = 0 - GT destination address: gsmSCF (E.164 number), SSN = 147 (CAMEL (105) platform), TT = 0 2. (Step 2, Figure 6) The database of the CAMEL platform (105) reads the value of the telephone identifier MSISDNFR and derives the telephone identifier MSISDNFR-Loc. Indeed, the MSISDNFR-Loc is the only French number known to the subscriber and which identifies the subscriber. 3. (Step 3, Figure 6) The 'Service Control Function' (105) of the `Main Hub '(10) of the HPLMNMON sends to the VMSC-V a signaling message' CAP_REQUEST_REPORTBCSMEVENT '. The syntax and parameters of the `CAP_REQUEST_REPORTBCSM_EVENT 'message are defined in 3GPP TS 03.78: 3rd Generation Partnership Project; Technical Specification Group Core Network; Customized Applications for Mobile Network Enhanced Logic (CAMEL) Phase 2; Stage 2 (Release 1998) .. The main parameters of this message are: At the CAP level: the Detection Points' (DP) At the SCCP level: - Transmission GT address: gsmSCF (E.164 number), SSN = 147 ( CAMEL platform (105)), TT = 0 - GT destination address: VLR-V (E.164 number), SSN = 7, TT = 0 4. (Step 4, Figure 6) The Service Control Function ( 105) of the 'Main Hub' (10) of the HPLMNMON network sends the VMSC-V a 'CAP CONNECT' signaling message. The purpose is to allow the VMSCV to change the identifier of the calling number, replacing the MSISDNFR with the MSISDNFR-Loc. Indeed, as already explained in step 2 the MSISDNFR-Loc is the only French number known by the subscriber and which identifies the latter. The syntax and parameters of the `CAP_CONNECT 'message are defined in 3GPP TS 03.78: 3rd Generation Partnership Project; Technical Specification Group Core Network; Customized Applications for Mobile Network Enhanced Logic (CAMEL) Phase 2; Stage 2 (Release 1998) .. The main parameters of this message are: At CAP level: the parameter `GenericNumber = MSISDNFR-Loc At SCCP level: - Transmission GT address: gsmSCF (E.164 number), SSN = 147 (CAMEL platform (105)), TT = 0 - GT destination address: VLR-V (E.164 number), SSN = 7, TT = 0 5. (Step 5, Figure 6) An ISUP IAM message is sent from the VMSC-V of the visited network to the GMSC of the destination network (note: in Figure 6, a Signaling Transfer Point '(STP) is represented as a generic transit point). At the ISUP level the caller ID is the MSISDNFR-Loc obtained in step 4.

Note: As already explained in the appendix to Figure 4, step 6 of Figure 4 (INSERT SUBSCRIBER DATA '(ISD)) allows to push in the VLR-V of the visited network the telephone identifier MSISDNFR-Loc belonging to the French operator who owns and operates the HPLMNLoc network (30) instead of the MSISDNFR identifier belonging to the OPERATORmoN. In this case, following receipt of an outgoing call request from the subscriber's telephone (40), the VMSC-V can directly execute the ISUP IAM procedure (Step 5 of Figure 6) using the correct identifier of the caller: no exchange of messages with the 'Service Control Function' (105) is necessary. 2 9 866 85 42 Procedures for sending SMS when the subscriber is in a network visited within the European Community - role of HPLMNMON's 'Main Hub' (10) Figure 7 details the equipment and the exchange of messages 5 to ensure the correct delivery of SMS messages when the subscriber is roaming in a country of the European Community. 1. (Step 1, Figure 7) Following the receipt of a request to send an SMS from the subscriber's telephone (40), the VMSC-V of the visited network sends a message of MAP SEND INFO FOR MO SMS signaling to the VLR-V of the visited network. The syntax and parameters of the `MAP SEND INFO FOR MO SMS 'message are defined in 3GPP TS 09.02: 3rd Generation Partnership Project; Technical 15 Specification Group Core Network; Mobile Application Part (MAP) specification (Release 1998). The main parameters of this message are: At the MAP level: the MSISDNFR telephone identifier belonging to the OPERATORMON. It is this number which was sent to the VLR-V of the visited network among the parameters of the MAP INSERT SUBSCRIBER DATA message (Step 6, Figure 4) At the SCCP level: - Transmit GT address: VMSC-V ( E.164 number), SSN = 8, TT = 0 - GT destination address: VLR-V (E.164 number), SSN = 7, TT = 0 2. (Step 2, Figure 7) A signaling message MAP SEND INFO FOR MO SMS ACK 'is returned from the VLRV of the visited network to the VMSC-V of the visited network. The syntax and parameters of the `MAP_SEND_INFO_FOR_MO_SMS_ACK 'message are defined in 3GPP TS 09.02: 3rd Generation Partnership Project; Technical Specification Group Core Network; Mobile Application Part (MAP) specification (Release 1998). The main parameters of this message are: At MAP level: the Belgian IMSI 'main' IMSIp_BE (160) (part of the set of IMSImoN identifiers) At the SCCP level: - Transmission GT address: VLR-V ( E.164), SSN = 7, TT = 0 - Destination GT address: VMSC-V (E.164 number), SSN = 8, TT = 0 3. (Step 3, Figure 7) A signaling message MAP MO FORWARD SHORTMESSAGE 'is sent from the VMSC-V of the visited network to the IWMSC-SMSC (103) of the HPLMNMON network (10). The syntax and parameters of the `MAP MO FORWARD SHORTMESSAGE 'message are defined in 3GPP TS 09.02: 3rd Generation Partnership Project; Technical Specification Group Core Network; Mobile Application Part (MAP) specification (Release 1998). The main parameters of this massage are: MAP level: - the IMSIp_BE IMSIp_BE IMSIp_BE (160) (part of the set of IMSImoN identifiers). - The SM-RP-DA that corresponds to the SMSC GT (103) - The SM-RP-OA that corresponds to the VMSC-V GT of the visited network - The SM-RP-UI that corresponds to the recipient number and the content of the SMS At SCCP level: - Transmission GT address: VMSC (E.164 number), SSN = 8, TT = 0 - GT destination address: IWMSC-SMSC (E.164 number), SSN = 8, TT = 0 4 (Step 4, Figure 7) A MAP MO FORWARD SHORTMESSAGE ACK message is returned from the IWMSC-SMSC (103) of the HPLMNMON network to the VMSC-V of the visited network. The syntax and parameters of the `MAP MO FORWARD SHORTMESSAGE ACK 'message are defined in 3GPP TS 09.02: 3rd Generation Partnership Project; Technical Specification Group Core Network; Mobile Application Part (MAP) specification (Release 1998). The main parameters of this message are: At the SCCP level: - Transmission GT address: IWMSC-SMSC (E.164 number), SSN = 8, TT = 0 - GT destination address: VMSC-V (E.164 number ), SSN = 8, TT = 0 5. (Step 5, Figure 7) The IWMSC-SMSC (103) sends a signaling message `CAP_INITIAL_DETECTION_POINT_SMS 'to the` Service Control Function' (105) of the 'Main' Hub (10). ) of the HPLMNMON network. The IWMSC-SMSC must support CAMEL (the minimum Phase 3) and the `CAMEL Subscription Information 'parameter (0-CSI) must be part of the parameters that have been sent within the` MAP_INSERTSUBSCRIBER DATA' message (Step 6 , Figure 4) so that the VMSC-V can know the address of the Service Control Function (105). The syntax and parameters of the `CAP INITIAL DETECTION POINT 'message are defined in 3GPP TS 03.78: 3rd Generation Partnership Project; Technical Specification Group Core Network; Customize Applications for Mobile Network Enhanced Logic (CAMEL) Phase 2; Stage 2 (Release 1998).

The main parameters of this message are: At the CAP level: - the IMSIp_BE IMSIp_BE IMSIp_BE (160) (part of the IMSIMON identifier set). - The MSISDNFR telephone identifier belonging to the OPERATORmoN. It is this number that was sent to the VLR-V of the visited network among the parameters of the message `MAP_INSERTSUBSCRIBER_DATA '(Step 6, Figure 4) At the SCCP level: - Transmission GT address: IWMSC-SMSC (E.164 number ), SSN = 8, TT = 0 - GT destination address: gsmSCF (E.164 number), SSN = 147 (CAMEL (105) platform), TT = 0 6. (Step 6, Figure 7) The `Service Control Function '(105) of the' Main Hub '(10) of the HPLMNMON network sends the IWMSC-SMSC a signaling message `CAP_REQUEST_REPORT_BCSM_EVENT'. The syntax and parameters of the `CAP_REQUEST_REPORT_BCSMEVENT 'message are defined in 3GPP TS 03.78: 3rd Generation Partnership Project; Technical Specification Group Core Network; Customized Applications for Mobile Network Enhanced Logic (CAMEL) Phase 3; Stage 2 (Release 1998) .. The main parameters of this message are: At the CAP level: the Detection Points' (DP) At the SCCP level: - Transmission GT address: gsmSCF (E.164 number), SSN = 147 ( CAMEL platform (105)), TT = 0 - GT destination address: IWMSC-SMSC (E.164 number), SSN = 8, TT = 0 7. (Step 7, Figure 7) The Service Control Function ( 105) of the 'Main Hub' (10) of the HPLMNMON network sends the IWMSC-SMSC a signaling message `CAP_CONNECTSMS '. The purpose is to allow the IWMSC-SMSC to change the ID of the calling number, replacing the MSISDNFR with the MSISDNFR-Loc. Indeed, as already explained in step 2 the MSISDNFR_Loc is the only French number known by the subscriber and which identifies the latter. The syntax and parameters of the `CAP_CONNECT_SMS 'message are defined in 3GPP TS 03.78: 3rd Generation Partnership Project; Technical Specification Group Core Network; Customized Applications for Mobile Network Enhanced Logic (CAMEL) Phase 3; Stage 2 (Release 1998). The main parameters of this message are: At the CAP level: the parameter `CallingPartyNumber = MSISDNFR-Loc At the SCCP level: 2 9 866 85 46 - Transmission GT address: gsmSCF (E.164 number), SSN = 147 (the platform CAMEL (105)), TT = 0 - GT destination address: IWMSC-SMSC (E.164 number), SSN = 8, TT = 0 5 8. (Step 8, Figure 7) A message `MAP SEND ROUTING INFO FOR SM REQ 'is sent from the IWMSC-SMSC (103) to the GMSC of the receiving party. The syntax and parameters of the `MAP SEND ROUTING INFO FOR SM REQ 'message are defined in 3GPP TS 09.02: 3rd Generation Partnership Project; Technical Specification Group Core Network; Mobile Application Part (MAP) specification (Release 1998). The main parameters of this message are: At the MAP level: 15 - the MSISDN = the recipient number - ServiceCenterAddress = the SMSC GT (103) of the 'Main Hub' (10) of the HPLMNMON network At the SCCP level: - GT address Issue: IWMSC-SMSC (E.164 number), SSN 20 = 8, TT = 0 - Destination GT address: Recipient MSISDN (E.164 number), SSN = 6, TT = 0 25 SMS receiving procedures when the subscriber is in a network visited within the European Community - role of HPLMNMON's 'Main Hub' (10) Figure 8 details the equipment and the exchange of messages to ensure the smooth running of the SMS reception when the subscriber is roaming in a country of the European Community. 1. (Step 1, Figure 8) A message message `MAP_SEND_ROUTING_INFO_FOR_SM_REQ 'is sent from GMSC (302) to the HLR (301) of the network (30). The main parameters of this message are: At the MAP level: - The telephone identifier MSISDNFR-Loc. 5 - ServiceCenterAddress = O-SMSC, the sending SMSC address. At the SCCP level: - Transmission GT address: GMSC (E.164 number), SSN = 8 (GMSC (302)), TT = 0 10 - GT destination address: MSISDNFR-Loc (E.164 number), SSN = 6 (HLR (301)), TT = 0 2. (Step 2, Figure 8) A message message "MAP SEND ROUTING INFO FOR SM ACK" is returned from the HLR (301) to the GMSC (302) of the network (30). The syntax and the parameters of the message are defined in the 3GPP standard TS 09.02 3rd Generation Partnership Project; Technical Specification Group Core Network; Mobile Application Part (MAP) specification (Release 1998). The main parameters of this message are: MAP level: 20 - IMSI 'local' IMSILoc (360). - VMSC address = GT-PS-VMSC (E.164 number), (address of the signaling gateway as VMSC emulator). At SCCP level: 25 - Transmission GT address: HLR (E.164 number), SSN = 6 (HLR (301)), TT = 0 - GT destination address: GMSC (E.164 number), SSN = 8 (GMSC (302)), TT = 0 3. (Step 3, Figure 8) A 30 `MAP_MT_FORWARD_SM 'signaling message is sent from the IWMSC-SMSC of the sending part of the SMS to the signaling gateway (50) as an emitter of a VMSC; indeed, as explained in FIG. 4 (step 7), the identification number IMSILoc (360) appears to be registered in a VLR of the HPLMNmoN network. The syntax and parameters of the `MAP_MT_FORWARDSM 'message are defined in 3GPP TS 09.02: 3rd Generation Partnership Project; Technical Specification Group Core Network; Mobile Application Part (MAP) specification (Release 1998). The main parameters of this message are: At MAP level: - IMSI 'local' IMSILoc (360). - ServiceCenterAddress = O-SMSC, the SMSC address of the party transmits this SMS. At the SCCP level: - Transmission GT address: O-IWMSC (E.164 number), SSN = 8, TT = 0 - GT destination address: GT-PS-VMSC (E.164 number), SSN = 8, TT = 0 4. (Step 4, Figure 8) The signaling gateway (50) reads the IMSILoc identification number. With its database (505) (described in Figure 3) the gateway (50) can derive the value of the IMSIp-BE IMSIp-BE. 5. (Step 5, Figure 8) A% AAP message SEND ROUTING INFO FOR SM REQ 'is sent from the signaling gateway (50) as an emulator of an IWMSCSMSC to the HLR (101) of the HPLMMON network ( 10). The main parameters of this message are: At the MAP level: - The telephone identification MSISDNFR - ServiceCenterAddress = GT-PS-IWMSC, the address of the signaling gateway as an emulator of the IWMSCSMSC At the SCCP level: - Address Transmission GT: GT-PS-IWMSC (E.164 number), SSN = 8, TT = 0 - GT destination address: MSISDNFR (E.164 number), SSN = 6 (HLR (101)), TT = 0 6. (Step 6, Figure 8) A 'MAP SEND ROUTING _ INFO _ FOR _ SM ACK' signaling message is returned from the HLM (101) HLR (101) to the signaling gateway (50). ) as an emitter of an IWMSC-SMSC. The main parameters are: MAP level: - IMSI 'main' IMSIP-BE - VMSC address = VMSC-V address of the visited network At SCCP level: - Transmission address: HLR (number E.164), SSN = 6 (the HLR (101)), TT = 0 - GT destination address: GT-PS-IWMSC (E.164 number), SSN = 8, TT = 0 7. (Step 7, Figure 8) A `MAP_MT_FORWARD_SM 'message is sent from the signaling gateway (50) as an emulator of an IWMSC-SMSC to the VMSC-V of the visited network. The main parameters of this message are: At the MAP level: - The IMSI 'main' IMSIp_BE (160) - ServiceCenterAddress = GT-PS-IWMSC, the signaling gateway address as emulator of the IWMSCSMSC Au SCCP level: - Transmission GT address: GT-PS-IWMSC (E.164 number), SSN = 8, TT = 0 (the GT address of the signaling gateway (50) as an emulator of a IWMSC-SMSC) - Destination GT address: VMSC-V (E.164 number), SSN = 8, TT = 0 8. (Step 8, Figure 8) A `MAP_MT_FORWARD_SM ACK 'message is returned from the VMSC-V visited network to the signaling gateway (50) as an emitter of an IWMSC-SMSC. The main parameters of this message are: At the SCCP level: - Transmission GT address: VMSC-V (E.164 number), SSN = 8, TT = 0 - GT destination address: GT-PS-IWMSC (E number .164), SSN = 8, TT = 0 9. (Step 9, Figure 8) A signaling message `MAP _ MT FORWARD SM ACK 'is sent from the signaling gateway (50) as an emulator of a VMSC to the IWMSC-SMSC-V of the visited network. The parameters of this main message are: At the SCCP level: - Transmission GT address: GT-PS-VMSC, SSN = 8, TT = 0 - Destination GT address: IWMSC-V, SSN = 8, TT = 0 Procedures incoming call to the subscriber when he is in a visited network within the European Community of HPLMNmoN and the subscriber is not available (Early Call Forwardinq and Late Call Forwardinq) - role of the 'Main Hub (10) Figures 9, 10 and 11 detail the equipment and the exchange of messages to ensure the correct progress of the redirection of an incoming call to the voicemail, when the subscriber is roaming in a country of the European Community and that he is not reachable.

Note: incoming call procedures when the subscriber is unreachable are almost identical to normal incoming call procedures (Figure 5). The differences from the steps of Figure 5 are detailed in the description of Figures 9, 10, 11.

Figure 9: The subscriber turned off his mobile phone, an event that triggered an 'IMSI detached' procedure from the VLR-V: Figure 9 represents the so-called 'Early Call Forwarding' (ECF) procedure, without polling the VLR -V. 1. (Step 1, Figure 9) No differences. 2. (Step 2, Figure 9) No differences. 3. (Step 3, Figure 9) No differences. 4. (Step 4, Figure 9) No differences. 5. (Step 5, Figure 9) No differences. 6. (Step 6, Figure 9) No differences. 7. (Step 7, Figure 9) No differences. 8. (Step 8, Figure 9) a MAP SENO ROUTING INFORMATIONACK message is returned from the HLR (101) to the GMSC (102) of the 'Main' Hub (10) of the HPLMNMON network. The main parameters of this message are: At MAP level: - Routing information and / or information on the subscriber's operational status (reachable or not). In this case, the information on the operational state of the subscriber indicates that the user is not reachable (status of 'IMSI detached'). At SCCP level: - Transmission GT address: HLR (E.164 number), SSN = 6 (HLR (101)), TT = 0 - GT destination address: GMSC (E.164 number), SSN = 8 (GMSC (102)), TT = 0 9. (Step 9, Figure 9) A message `MAP_RESUME_CALL_HANDLING 'is sent from the GMSC (102) of the' main 'hub (10) to the signaling gateway (50) of the HPLMNMON network. The syntax and parameters of the `MAP_RESUME_CALL_HANDLING 'message are defined in 3GPP TS 09.02: 3rd Generation Partnership Project; Technical Specification Group Core Network; Mobile Application Part (MAP) specification (Release 1998). The main parameters of this message are: At the MAP level: - The IMSI 'main' IMSIp_BE - The information that the subscriber is not reachable At the SCCP level (between the GMSC (102) and the signaling gateway (50 )): - Transmission GT address: GMSC (E.164 number), SSN = 8 (GMSC (102)), TT = 0 - GT destination address: GT-PS-VMSC (E.164 number) , SSN = 8 (the signaling gateway (50) as an emitter of a VMSC), TT = 0 10. (Step 10, Figure 9) The signaling gateway (50) reads the value of the IMSILoc at from the information on the correspondences between IMSI (IMSILoc, IMSIp-BE). 11. (Step 11, Figure 9) A MAP_RESUME_CALL_HANDLING message is sent from the signaling gateway (50) as an emulator of a VMSC of the 'main' hub (10) to the GMSC (302) of the HPLMNLoc network. The main parameters of this message are: At the MAP level: - The IMSILoc identifier - The information that the subscriber is not reachable At the SCCP level: - Transmission GT address: GT-PS-VMSC (E number .164), SSN = 8 (the signaling gateway (50) as a VMSC emulator), TT = 0 - Destination GT address: GMSC (E.164 number), SSN = 8 (GMSC (302 )), TT = 0. Note: If the GMSC GT address (302) is not known by the signaling gateway (50), the MAP_RESUME_CALL_HANDLING message will be processed by an appropriate STP to join the GMSC ( 302)). Figure 10: The subscriber is unavailable at the VLR-V. Figure 10 shows the so-called Early Call Forwarding (ECF) procedure, with VLR-V interrogation. 1. (Step 1, Figure 10) No differences. 2. (Step 2, Figure 10) No differences. 3. (Step 3, Figure 10) No differences. 4. (Step 4, Figure 10) No differences. 5. (Step 5, Figure 10) No differences. 6. (Step 6, Figure 10) No differences. 7. (Step 7, Figure 10) No differences. 8. (Step 8, Figure 10) A MAP PROVIDE ROAMING NUMBER message is sent from the HLR (101) of the 'Main' hub (10) of the HPLMNMON network to the VLR-V of the visited network. The main parameters of this message are: At MAP level: - IMSI 'main' IMSIp_BE At SCCP level: - Transmission GT address: HLR (E.164 number), SSN = 6 (the HLR (101)), TT = 0 - Destination GT address: VLR-V (E.164 number), SSN = 7, TT = 0 9. (Step 8, Figure 10) A MAP PROVIDE ROAMING NUMBER_ACK message is returned from the VLR -V of the visited network to the HLR (101) of the 'main' hub (10) of the HPLMNMON network. The main parameters of this message are: At the MAP level: - The status of the subscriber (here (Status: unreachable)) At the SCCP level: - Transmission GT address: VLR-V (E.164 number), SSN = 7, TT = 0 - Destination GT Address: HLR (E.164 number), SSN = 6 (HLR (101)), TT = 0 10. (Step 9, Figure 10) A MAP SEND ROUTING message INFORMATION_ACK 'is returned from the HLR (101) to the GMSC (102) of the' main 'hub (10) of the HPLMNMON network. The main parameters of this message are: At MAP level: - Routing information and / or information on the subscriber's operational status (reachable or not). In this case, the subscriber's operational status information indicates that the user is not reachable ('unreachable' state). At the SCCP level: - Transmission GT address: HLR (E.164 number), SSN = 6 (HLR 5 (101)), TT = 0 - GT destination address: GMSC (E.164 number), SSN = 8 (GMSC (102)), TT = 0 11. (Step 10, Figure 10) A MAP RESUME CALLHANDLING message is sent from the GMSC (102) 10 of the 'Main' Hub (10) to the signaling gateway (50). ) of the HPLMNMON network. The main parameters of this message are: At the MAP level: - The IMSI `main 'IMSIp_BE - The information that the subscriber is not reachable 15 At the SCCP level (between the GMSC (102) and the signaling gateway ( 50)): - Transmission GT address: GMSC (E.164 number), SSN = 8 (GMSC (102)), TT = 0 - GT destination address: GT-PS-VMSC (E.164 number ), SSN = 8 (the signaling gateway (50) as a VMSC emulator), TT = 0 12. (Step 11, Figure 10) The signaling gateway (50) reads the value of the IMSILoc from the information on the correspondences between IMSI (IMSILoc, IMSIp_BE). 13. (Step 12, Figure 10) A MAP RESUME CALL HANDLING message is sent from the signaling gateway (50) as an emulator of a VMSC of the `Main Hub '(10) to the GMSC (302) of the HPLMNLoc network. The main parameters of this message are: At the MAP level: - The IMSILoc identifier - The information that the subscriber is not reachable At the SCCP level: - Transmission GT address: GT-PS-VMSC (number E.164), SSN = 8 (the signaling gateway (50) as a VMSC emulator), TT = 0 - Destination GT address: GMSC (E.164 number), SSN = 8 (GMSC ( 302)), TT = 0. Note: If the GMSC GT address (302) is not known by the signaling gateway (50), the MAP_RESUME_CALLHANDLING message will be processed by an appropriate STP to join the GMSC (302)).

Figure 11: The subscriber is unavailable at the VLR-V. Figure 11 shows the tate call forwarding procedure (ECF). The following steps are described with respect to the description of Figure 10. 1. (Step 1, Figure 11) No differences from the same step of Figure 10. 2. (Step 2, Figure 11) No differences by report at the same step of Figure 10. 3. (Step 3, Figure 11) No differences from the same step of Figure 10. 4. (Step 4, Figure 11) No differences from the same step of Figure 10. 5. (Step 5, Figure 11) No differences from the same step of Figure 10. 6. (Step 6, Figure 11) No differences from the same step of Figure 10. 7. ( Step 7, Figure 11) No differences from the same step of Figure 10. 8. (Step 8, Figure 11) No differences from the same step of Figure 10. 9. (Step 9, Figure 11) a MAP PROVIDE ROAMING NUMBERACK signaling message is returned from the VLR-V of the visited network to the HLR (101) of the 'main' hub (10) of the HPLMNMON network. The main parameters of this message are: At MAP level: - The temporary mobile phone roaming number (MSRN) assigned by the VLR-V. - The GT address of the destination VMSC-V, in the visited network At the SCCP level: - Transmission GT address: VLR-V (E.164 number), SSN = 7, TT = 0 - Destination GT address: HLR (E.164 number), SSN = 6 (the HLR (101)), TT = 0 10. (Step 10, Figure 11) A MAP SEND ROUTING INFORMATION_ACK message is returned from the HLR (101) to the GMSC (102) of the 'main' hub (10) of the HPLMNMON network. The main parameters of this message are: At MAP level: routing information. In this case, it is the MSRN of step 9.

At SCCP level: - Transmission GT address: HLR (E.164 number), SSN = 6 (HLR (101)), TT = 0 - GT destination address: GMSC (E.164 number), SSN = 8 (GMSC (102)), TT = 0 11. (Step 11, Figure 11) An ISUP IAM message is sent from the GMSC (102) of the 'Main' Hub (10) of the HPLMNMON network to the VMSC-V of the network visit. At the ISUP level, the main parameter of this message is the MSRN obtained in step 9. 12. (Step 12, Figure 11) A MAP RESUME CALL HANDLING message is sent from the VMSC-V to the GMSC (102) of the 'Main' hub (10). The main parameters of this message are: At the MAP level: - The identifier MSISDNFR-Loc - The information that the subscriber is not reachable At the SCCP level (between the VMSC-V and the GMSC (102)): - Transmission GT address: VMSC-V (E.164 number), SSN = 8, TT = 0 2 9 86 6 85 57 - GT destination address: GMSC (E.164 number), SSN = 8 (the GMSC (102)), TT = 0 13. (Step 13, Figure 11) A MAP RESUME CALL HANDLING_ACK signaling message is returned from the GMSC (102) of the 'Main' Hub (10) to the VMSC-V. The main parameters of this message are: At the SCCP level (between the GMSC (102) and VMSC-V): - Transmission GT address: GMSC (E.164 number), SSN = 8, (the GMSC (102) )), TT = 0 10 - Destination GT address: VMSC-V (E.164 number), SSN = 8, TT = 0 14. (Step 14, Figure 11) An ISUP REL message is sent from the GMSC (102 ) from the 'Main' hub (10) of the HPLMNMON network to the VMSC-V of the visited network. At the MTP level (between the GMSC (102) and the VMSC-V) the main parameters of this message are: - Transmitting Point Code (PC): the GMSC PC (102) referenced GMSC-PC - PC destination: the PC of the VMSC-V referenced VMSC-PC. 15. (Step 15, Figure 11) No differences from step 11 of Figure 10. 16. (Step 16, Figure 11) No differences from step 12 of Figure 10. 17. ( Step 17, Figure 11) No differences from step 13 of Figure 10. Procedures for sending an additional service when the subscriber is in a visited network within the European Community - role of ' HPLMNMON Main Hub (10) Figure 12 details equipment and message exchanges to ensure the proper completion of an additional service request (for example, redirection of an incoming call to another number when the subscriber is roaming in a European Community country and can not be reached 1 (Step 1, Figure 12) a 'MAP REGISTER SS' signaling message is sent from the VLR-V of the network visited to the PS gateway (50) of the subnet (10) .The syntax and parameters s of the `MAP_REGISTERSS 'message are defined in 3GPP TS 09.02: 3rd Generation Partnership Project; Technical Specification Group Core Network; Mobile Application Part (MAP) specification (Release 1998). The message is routed to the PS signaling gateway (50) through the GMSC (102). The main parameters of this message are: MAP level: - The code of the supplementary service. At the SCCP level: - Transmission GT address: VLR-V (E.164 number), SSN = 7 (VLR-V), TT = 0 - GT destination address: MGTp_BE (E.214 number derived from the IMSI Belgian 'main' IMSIp-BE), SSN = 7, TT = 0 2. (Step 2, Figure 12) The signaling gateway (50) reads the value of the IMSIp_BE IMSIp_BE. With its database (505) (described in Figure 3) the gateway (50) can derive the identification number IMSILoc (360). 3. (Step 3, Figure 12) A `MAP REGISTER SS 'signaling message is sent from the signaling gateway (50) to the HLR (301) of the network (30). The message is routed to the HLR (301) through the GMSC (302). The main parameters of this message are: MAP level: - The code of the supplementary service.

At the SCCP level: - Transmission GT address: GT-PS-VLR (E.164 number), SSN = 7, TT = 0 (the GT address of the signaling gateway (50) as an emulator of a VLR) 2 9866 85 59 - GT destination address: MGTLoc (E.214 number derived from the Belgian 'main' IMSI IMSIL0c), SSN = 6 (the HLR (301)), TT = 0 4. (Step 4 , Figure 16) a% AAP REGISTER SS ACK 'signaling message is sent from the HLR (301) of the network (30) to the PS signaling gateway (50). The syntax and parameters of the `MAP_REGISTER_SS ACK 'message are defined in 3GPP TS 09.02: 3rd Generation Partnership Project; Technical Specification Group Core Network; Mobile Application Part (MAP) specification (Release 1998). The main parameters of this message are at the SCCP level: - Transmission GT address: HLR (E.164 number), SSN = 6 (the HLR (301)), TT = 0 - GT destination address: GT-PS -VLR (E.164 number), SSN 15 = 7, TT = 0 (the GT address of the signaling gateway (50) as an emulator of a VLR) 5. (Step 5, Figure 16) a 'MAP REGISTERSS ACK' signaling message is sent from the PS signaling gateway (50) to the VLR-V of the visited network. The main parameters of this message are: At SCCP level: - Transmission GT address: GT-PS-HLR, SSN = 6, TT = 0 (the GT address of the PS signaling gateway (50) as 'emulator of an HLR) 25 - Destination GT address: VLR-V (E.164 number), SSN = 7 (VLR-V), TT = 0 2 9 866 85 60 GLOSSARY AND ABBREVIATIONS USED AS:' Autonomous System , A set of IP computer networks integrated into the Internet and whose internal routing policy (routes to be prioritized, filtering ads) is consistent. 5 BCSM "Basic Call State Model", abstract view of call processing activities. It identifies specific points in call processing where the logic of a CAMEL service is allowed to interact with call processing and describes a framework in which the timing of the transfer of control between the call can be specified. basic call processing (VMSC / GMSC) and the service logic (SCF). CAMEL: "Customized Applications for Mobile Network Enhanced Logic", a set of functionalities that takes the basic principles of the Intelligent Network by adding a mobile CAP dimension: "CAMEL Application Part", a high-level 15 GSM standard protocol that performs all exchanges between the different functional elements of the CAMEL CdPA platform: "Called Party Address", address or telephone number of a called entity (or recipient) CqPA: "Calling Party Address", address or telephone number of a calling entity ( or transmitter) DP: "Detection Point", information which identifies the moment in the call processing where the transfer of control can be done DPC: "Destination Point Code", "Point Code" of a recipient equipment of a MAP, CAP or ISUP message 25 E.164: definition - according to the SS7 network standard - of a MSISDN. According to the E164 standard, an MSISDN has the format (country code, national destination code, subscriber number) E.214: The SS7 standard E.214 defines a hybrid number, in which the country code and the destination code E.164 format, while the subscriber identification number is in E.212 format. The existence of the E.214 format is justified by the fact that the international SS7 networks require an E.164-type header in order to route the signaling messages.

ECF: "Early Call Forwarding", call forwarding before setting up a call to the recipient Full MVNO: "Full Mobile Virtual Network Operator" is a mobile operator that does not have a spectrum license. frequencies or infrastructure for transmission over the air, enters into agreements with the MNOs to interconnect its equipment. A Full MVNO owns the core network equipment (such as HLR, GMSC, GGSN, etc.); he is also responsible for the manufacture and operation of his own GGSN SIM cards: "Gateway GPRS Support Node", gateway for interconnection between the mobile packet network (GPRS or UMTS) and GGSNLoc external IP networks: GGSN owned and controlled by the HPLMNmoN operator. The GGSNLoc is interconnected to the 'local' network HPLMNLoc GMSC: 'Gateway MSC', a telephone switch allowing access to the mobile network of an operator via an SS7 connection and roaming agreements GMSCLoc: GMSC owned and controlled by the operator of HPLMNmoN. The GMSCLoc is interconnected to the 'local' HPLMNLoc GRX network: 'GPRS Roaming Exchange', a secure IP routing network for mobile operators, allowing their subscribers to switch between multiple operators while still accessing the data services of their carriers. home network gsmSCF: "GSM Service Control Function", functional entity which contains the service logic 25 gsmSSF: "GSM Service Switching Function", functional entity that interfaces a VMSC / GMSC to the gsmSCF GT: "Global Title", address used for routing of signaling messages in telecommunication networks. Any equipment, such as GMSC, HLR, etc. has his own 'GT'. 30 HLR: "Home Location Register" HPLMN mobile subscriber home location register: "Home Public Land Mobile Network", HPLMNmoN mobile subscription network: network that provides the HPLMNLoc 'global' SIM card: a network provides the local identifier of the SIM-IMSI IDP SIM card: "Initial Detection Point", CAP protocol service allowing the gsmSSF entity after detecting a "DP" point in the BCSM model, to request the entity gsmSCF instructions for handling the call.

IMSI: "International Mobile Subscriber Identity", internal numbering (15 or 16 digits) to an HPLMN network. The first field of this numbering is the MCC (Mobile Country Code - 3 digits), the second field is the MNC (Mobile Network Code - usually 2 digits). The remaining ten digits define respectively the HLR controlling the IMSI (2 digits) and the subscriber identifier (8 digits). As an example, for a German HPLMN MCC = 262, for a French HPLMN MCC = 208. The format of the IMSI complies with the standard `` E.212 'SS7 networks. INSERT SUBSCRIBER DATA: MAP protocol service used to send from the HLR the description of the subscriber's profile (MSISDN, subscription to CAMEL services, etc.) when it is in a VPLMN. The message is received by the MSCNLR of the VPLMN ISUP: "ISDN User Part", which is part of the SS7 network and is used for the management of telephone calls in ISUP IAM public switched networks: "Initial Address Message", the first message sent to inform the partner switch that a call establishment must be made to the destination number contained in the message parameters. IWMSC: "(MSC) interworking SMS", an MSC capable of receiving a short message from the mobile network and transferring it to the SMSC LCF: "Late Call Forwarding", returns call after setting up a DSC. call to addressee LI: "Lawful Intercept", set of procedures initiated by an investigating judge in order to obtain subscriber communications data during a judicial investigation. UPDATE RENTAL: A MAP protocol service used to register the presence of a subscriber in a VPLMN in the HLR. The message is sent by the MSCNLR of the VPLMN.

MAP: "Mobility Application Part", the GSM standard high-level protocol that carries out all exchanges related to mobility, call control and additional services MCC: "Mobile Country Code", see the IMSI MNO definition: Mobile Network Operator, a mobile phone operator that owns a spectrum spectrum franchise and clean network infrastructure. The infrastructure consists of components allowing the mobile link over the air and the core network components. MSC: "Mobile Switching Center", MSC / VLR mobile phone switch: all the features of the MSC and VLR; although distinct, these features are often considered as a whole in the architectural presentations to simplify the description. MSISDN: "Mobile Station ISDN Number", the "known to the public" number of the GSM or UMTS user as opposed to the IMSI number. It is this identifier, commonly called the telephone number, which will be dialed in order to reach the subscriber. In general, only the HLR knows the correspondence between the MSISDN and the IMSI. MSRN: "Mobile Station Roaming Number", a temporary roaming number dynamically assigned to each incoming call request by the VPLMN. MTP: Message Transfer Part, network layer of SS7 systems providing services such as addressing (through 'Point Code') and routing (each node of the SS7 network has a preconfigured routing table allowing to know the next node through which pass 25 to route a packet to the destination) NP: "Numbering Plan", integer number corresponding to a type of number (E.164, E.214, etc.) in the dial plan SS7 0-CSI "Originating CAMEL Subscription Information", a set of parameters that contain information for triggering service logic from a visited VMSCC for outgoing calls. OPC: "Origination Point Code", "Point Code" of a device transmitting a MAP, CAP or ISUP OTA message: "Over The Air", a technology that allows access to data from a SIM card remotely. For example, it allows a mobile operator to update the content or to introduce a new one in a fast, efficient and low-service way on a lot of expensive PC SIM cards: "Point Code", address at the same time. the MTP layer in the PRN SS7 signaling network: "Provide Roaming Number", a MAP service that allows a GMSC to know the MSRN of the recipient of the call. It is the HLR of the calling party's network that sends the message `PRN 'to the MSC / VLR of the recipient's VPLMN network.

REGISTER SS: Service of the MAP protocol used to set up call forwarding. In EP 1942695 Al this service is used to trigger a Call Back procedure. Roaming Roariing: contractual and technical provisions allowing a mobile subscriber to use his phone in networks other than his own. RRBE: "Request Report BCSM Event", information flow sent by the gsmSCF entity to request the gsmSSF entity to monitor an event associated with the call (eg, BCSM events such as busy, no answer, start end of communication), then return a notification to the gsmSCF when the event is detected SCCP: "Signaling Connection Control Part", standard protocol for SS7 networks that provides network-level services for upstream interconnection 'Global Title' (GT) between different devices.

SCP: "Service Control Point", functional component of CAMEL networks, used for the control (initialization, start-up, termination, billing ...) of the services. SGSN: "Serving GPRS Support Node", a gateway for routing data within GPRS mobile networks SMSC: "Short Message Service Center", manages the transfer of SMS messages (text or binary) between mobile phones SNDCP "Sub Network Dependent Convergence Protocol", a GPRS Level 3 protocol that specifies the features and messages between a mobile phone and the SGSN.

SPC: "Signaling Point Code", unique address for a network node called Signaling Point. The SPC is similar to the IP address in a packet-switched network. SRI: "Send Routing Information", MAP protocol service allowing a GMSC to know the call routing information. SS7: "Signaling System no. 7 ", interconnection network used between mobile networks for the transmission of signaling for any circuit-switched communication (voice, short messages, etc.) SSN:" Sub-System Number ", number which identifies a user function 10 in the SCCP TT protocol: "Translation Type", fields of the SCCP protocol which makes it possible to address the appropriate address translator in the international SS7 interconnections VLR: "Visited Location Register", visited location register 15 VPLMN: "Visited Public Land Mobile Network ", network visited by a mobile roaming

Claims (13)

REVENDICATIONS1. Registered mobile system: - in a HPLMNMON global network when mobiles are in a roaming situation - in a HPLMNLoc national network when mobiles are in their country of origin, characterized in that: - HPLMNMON is composed of a set of subnets each subnet of the set is referred to as 'Hub'. A single cellular operator, referenced OPERATORMON, is responsible for the operation and operation of each Hub of the HPLMNMON; the HPLMNMON's different Hubs communicate with each other through a dedicated physical and logical link that allows the exchange of signaling and data messages (voice, data, SMS, etc.) - The same OPERATORMON is also 'MVNO' on the network HPLMNLoc; - Among HPLMNMON Hubs a 'Main' Hub contains at least one Primary Location Register (HLR), a Gateway-Switch (GMSC), a Gateway-Router (GGSN), a Short Message Processing Center (SMSC) and a CAMEL intelligent platform. - The other HPLMNMON Hubs contain at least one gateway switch (GMSC), a gateway router (GGSN) and a short message processing center (SMSC) - A double IMSI SIM card is inserted in each mobile of the system according to the invention, allowing: o The registration of the mobile national network HPLMNLoc with an IMSILoc that allows the mobile to receive any call or short messages through the use of a first national telephone number o L registering the mobile with one of the hubs of the HPLMNMON global network with an IMSIMON that allows the mobile to receive any call or short messages through the use of a second phone number that has the same country ID of the first national phone number. - The first national telephone number is owned by the operator who owns and operates the national network HPLMNLoc 5 - The second telephone number is owned by OPERATEURMON - The first national telephone number and The second telephone number have the same country identifier. A signaling gateway (PS), owned by OPERATORMON, allows a physical and logical interconnection between one of the hubs of the global network HPLMNMON and HPLMNLoc. 2. System according to claim 1, characterized in that the dual-IMSI SIM card contains: A first set of information, owned by the operator who owns and operates the national network HPLMNLoc, which includes: a number IMSILoc, a secret authentication key KLoc and the first national telephone number - A second set of information, owned by the operator OPERATEURMON which owns and operates the global network HPLMNMON, 20 of which are included: o A number IMSIMON identification number, which varies according to the visited country of the roaming mobile and whose value allows the registration of the mobile to one of the hubs of the HPLMNMON network. o A secret KMON authentication key which, unlike the IMSIMON identification number, has a unique value. o A second phone number that has the same country ID of the first national phone number. 3. System according to claims 1 and 2, characterized in that the PS signaling gateway allows a physical and logical interconnection between the HPLMNLoc network and one or more hubs of the HPLMNMON network, allowing the routing of the signaling between the two networks. for controlling features such as mobile authentication and registration, mobility management, inbound and outbound call and short message procedures, supplementary services, call forwarding and data communications. The routing of the signaling is carried out by means of a database in which the correspondence between the identification number (variable) IMSIMON and the correspondent IMSILoc and between the first national telephone number and the second telephone number are recorded. 4. Method according to claims 1, 2, 3, characterized in that the mobile registration procedures in a visited network are performed according to the following operations: - One of the possible values of IMSIMON is activated, allowing the registration of the mobile to one of the hubs of the HPLMNMON network. - The Visited Location Register (VLR) and HPLMNMON Global Location Registry (HLR) exchange authentication and location information. The second telephone number is registered by the visited location register (VLR). - The signaling gateway PS of the global network HPLMNMON reads the value of IMSILoc which corresponds to the active value of IMSIMON. - The HPLMNMON global network PS gateway emulates a Visited Location Register (VLR); a location information exchange is carried out between PS and the home location register (HLR) of the national network HPLMNLoc in order to register the mobile IMSILoc identifier on the PS gateway of the global network HPLMNMON. The first national phone number is registered by the PS gateway. 5. Method according to claim 4, characterized in that at the end of the exchange of location information between the visited location register (VLR) and the main location register (HLR) of the global network HPLMNMON is the first national telephone number which is registered by the visited location register (VLR). 6. Method according to claims 1, 2, 3, 4, characterized in that the telephone calls to the first national telephone number when the mobile is in a visited network are sent to the gateway-switch (GMSC) of the national network HPLMNLoc , the location of the mobile in the visited network triggering the following operations: - The gateway-switch (GMSC) of the national network HPLMNLoc requests the main location register (HLR) of the network HPLMNLoc the information necessary to route the call to the first national telephone number. - The home location register (HLR) of the national network HPLMNLoc requests the roaming number, corresponding to the mobile IMSILoc identifier, to the signaling gateway PS of the global network HPLMNMON, said gateway emulating a visited location register (VLR). ). - The signaling gateway PS of the global network HPLMNMON refers to the main localization register (HLR) of the national network HPLMNLoc the second telephone number, this second number acting as temporary roaming number (MSRN) for the mobile. The identifier of the visited network switch (VMSC) which is to route the call to the roaming number is also forwarded, said switch being emulated by the signaling gateway PS. - After receiving said information from the HPLMNLoc national home location register (HLR), the national network HPLMNLoc gateway switch (GMSC) returns the call request to the second telephone number to the signaling gateway PS, as the emulator of the visited network switch (VMSC). - In turn, the PS gateway, as the emulator of the visited network switch (VMSC), returns the call request to the gateway-switch (GMSC) of the Hub of the global network HPLMNMON, Hub with which the mobile is registered. - The gateway switch (GMSC) of the HPLMNMON Global Network Hub with which the mobile is registered requests the HPLMNMON global location network (HLR) the information necessary to route the call to the second national telephone number. - The HPLMNMON global home location register (HLR) requests the temporary roaming number (MSRN), corresponding to the mobile IMSIMON ID with which the mobile has registered on that Hub, to the visited location register ( VLR) of the network in which the mobile is roaming - The HPLMNMON global home location register (HLR) receives from the visited location register (VLR) the temporary roaming number (MSRN) allocated to the identifier IMSIMON. In addition, the Visited Network Switch Identifier (VMSC) which is to route the call to the MSRN is also forwarded. - After receiving the temporary roaming number (MSRN) from the HPLMNMON Global Location Registry (HLR), the HPLMNMON Global Network Hub-GMSC (GMSC) with which the mobile is registered establishes a call to the visited network switch (VMSC), to the mobile. 7. Method according to claims 1, 2, 3, 5 characterized in that once received the call request from the PS signaling gateway, as emulator of the visited network switch (VMSC), the gateway switch (GMSC) of the HPLMNMON global network hub to which the mobile is registered requests the HPLMNMON global home location register (HLR) information necessary to route the call to the first registered national telephone number by the visited location register (VLR). 8. Method according to claims 1, 2, 3, 4, characterized in that the telephone calls from the mobile which is in a visited network trigger an exchange of messages between a visited network switch (VMSC) and a smart platform CAMEL type of the HPLMNMON network so that the latter can instruct the visited network switch (VMSC) to replace the second telephone number with the first national telephone number, which is the only known number in correspondence of the mobile. 9. Method according to claims 1, 2, 3, 4, characterized in that the short messages (SMS) issued by the mobile which is in a visited network triggering the following operations: - A signaling exchange between a location register visited (VLR) from which the mobile registered and a visited network switch (VMSC) allows the latter to know the IMSIMON identifier of the mobile with which the mobile has registered on the Hub. - The visited network switch (VMSC) transfers the short message to the Short Message Processing Center (SMSC) of the Hub from which the mobile registered. - An exchange of messages takes place between the SMSC of the Hub with which the mobile has registered and a CAMEL-type intelligent platform of the HPLMNMON network so that the latter can instruct the processing center of the short messages (SMSC) to replace the second telephone number with the first national telephone number, which is the only known number in correspondence of the mobile. - The Short Message Processing Center (SMSC) of the HPLMNMON Global Network Hub with which the mobile is registered sends a request to the gateway switch (GMSC) of the recipient's network for routing information for the short message. . 10. Method according to claims 1, 2, 3, 5, characterized in that the short messages (SMS) sent by the mobile which is in a visited network triggering the following operations: - A signaling exchange between a register of visited location (VLR) from which the mobile registered and a VMSC allows the latter to know the mobile IMSIMON ID with which the mobile registered on the Hub. - The visited network switch (VMSC) transfers the short message to the Short Message Processing Center (SMSC) of the Hub from which the mobile registered. - The Short Message Processing Center (SMSC) of the HPLMNMON Global Network Hub with which the mobile is registered sends a request to the gateway switch (GMSC) of the recipient's network for routing information for the short message. . 11. Method according to claims 1, 2, 3, 4, characterized in that the short messages (SMS) to the mobile which is in a visited network and which is identified by the first national telephone number triggering the following operations: - A signaling exchange between the gateway switch (GMSC) and the home location register (HLR) of the national network HPLMNLoc allows the gateway switch (GMSC) of the network transmitting the short message to know the routing information for that message. latest. - The gateway switch (GMSC) of the network transmitting the short message routes it to the PS signaling gateway, as emulator of the visited network switch (VMSC). In turn, the PS gateway requests the HPLMNMON global location register (HLR) for the necessary information to route the short message to the second national telephone number. - The HPLMNMON global home location register (HLR) refers to the PS signaling gateway the routing information, ie the mobile IMSIMON ID with which the mobile registered on the Hub and the address of the Visited Network Switch (VMSC) .- The PS gateway, as a short message processing center emulator, routes the short message to the visited network switch (VMSC). - Once received from the visited network switch (VMSC) confirming that the short message has been routed to the mobile, the signaling gateway, as the visited network switch emulator (VMSC), returns - to turn - the same confirmation at the switch-gateway (GMSC) of the national network HPLMNLoc. 10 12. Method according to claims 1, 2, 3, 4, 5, 6, 7 characterized in that the telephone calls to the first national telephone number when the mobile is in a visited network and it is not reachable triggering the following operations: - A `MAP_RESUME-CALL_HANDLING 'message is sent from the gateway switch (GMSC) of the HPLMNMON global network Hub to which the mobile is registered to the signaling gateway (50), said gateway emulating the switch of the visited network (VMSC). The PS gateway reads the value of IMSILoc which corresponds to the active value of IMSIMON. - In turn, the PS signaling gateway returns the message `MAP RESUME-CALL HANDLING '- with parameter IMSILoc - to the gateway-switch (GMSC) of the national network HPLMNLoc so that this gateway-switch (GMSC) can transfer the call to the voicemail which corresponds to the first national telephone number. 13. Method according to claims 1, 2, 3, 4 characterized in that any additional service request when the mobile is in a visited network triggering the following operations: - A message of type `MAP_REGISTER_SS 'is sent from the register of Visited location (VLR) of the network in which the mobile is roaming to the gateway switch (GMSC) of the HPLMNMON Global Network Hub to which the mobile is registered. - In turn, the gateway switch (GMSC) of the HPLMNMON global network hub with which the mobile is registered returns the message `MAP_REGISTER_SS 'to the signaling gateway (50), said gateway emulating the visited location register (VLR) . - The PS signaling gateway reads the value of IMSILoc which corresponds to the active value of IMSImoN. - In turn, the PS signaling gateway returns the message `MAP REGISTER_SS '- with IMSILoc parameter - to the gateway-switch (GMSC) of the national network HPLMNLoc so that this gateway-switch (GMSC) can transfer the additional service request to the HPLMNLoc.15 Main Location Register (HLR)