WO2010118778A1

WO2010118778A1 - Routing call via selective cellular network or packet switched network

Info

Publication number: WO2010118778A1
Application number: PCT/EP2009/054539
Authority: WO
Inventors: Khalid Bin Yousif Alkhalaf
Original assignee: Alkhalaf, Rakan Khaled Y
Priority date: 2009-04-16
Filing date: 2009-04-16
Publication date: 2010-10-21

Abstract

A Method to route a call from a first terminal (1) being in connection with a first network (A) to a mobile terminal (2) being in connection with a second network (B) is provided. The first network comprises a routing module (3) having a routing table (30). The mobile terminal (2) comprises at least a first identification module (20) provided with an identity (ID A) of the first network (A) and a software module (21) comprising software to be connected to a packet switched network (4). A second identification module (B) that is provided with an identity (ID B) of the second network (B) is provided for the mobile terminal (2). Upon the second identification module (B) is in connection with the mobile terminal (2) a notification (40) is sent from the mobile terminal (2) via the packet switched network (4) to the routing module (3), wherein the notification (40) comprises information concerning the identity of the first identification module (A) and of the second identification module (B). Said notification is stored in said routing table (30) in a manner that a correlation between the first module (A) and the second module (B) can be established (31). Said routing table (30) is queried once a call is being made from the first terminal (1) to the mobile terminal (2) and wherein the call is being forwarded based on the information stored in the routing table (3).

Description

ROUTING CALL VIA SELECTIVE CELLULAR NETWORK OR PACKET SWITCHED NETWORK

Field of the invention

The invention relates to a method for routing calls between a first terminal and a mobile terminal according to claim 1.

Prior Art

Systems and methods to handle calls or data communication between a first terminal such as a mobile phone being in the domain of a native or home network and a second terminal such as a mobile phone being in the domain of a foreign network are well known from prior art.

It is for example possible for a user of the first mobile phone being located in the domain of his home network which is for example the network of country A and having a contract with a mobile phone company of country A to establish a connection to a second mobile phone whose user is abroad in a country B. Via said connection voice data, SMS data or any other kind of data may be exchanged. This is rather costly, as the user of the second mobile phone has to pay a roaming fee to the mobile phone company in country B as he does not have a contract with said company.

Summary of the invention

An object of the present invention is to provide a method, which does not have the drawbacks of prior art. hi particular a method shall be provided to route a call efficiently from a first terminal to a second terminal. In particular the call shall be routed automatically in the most cost effective manner.

Such an object is achieved by a method according to claim 1. Thereby a method to route a call from a first terminal being in connection with a first network to a mobile terminal being in connection with a second network, wherein the first network comprises a routing module having a routing table is provided. The mobile terminal comprises at least a first identification module provided with an identity of the first network and a software module comprising software to be connected to a packet switched network. A second identification module that is provided with an identity of the second network is provided for the mobile terminal. Shortly after the second identification module is in connection with the mobile terminal a notification is sent from the mobile terminal via the packet switched network to the routing module. Said notification comprises information concerning the identity of the first identification module and of the second identification module. Said notification is stored in said routing table in a manner that a correlation between the first module and the second module can be established. Said routing table is queried once a call is being made from the first terminal to the mobile terminal and wherein the call is being forwarded based on the information stored in the routing table.

Preferably the first identification module is a first subscriber identification module and the second identification module is a second subscriber identification module, wherein said notification is submitted upon or shortly after the step of replacing said first subscriber identification module with said second subscriber identification module.

Preferably information with regard to the first subscriber identification module is stored in a memory means of the mobile terminal before the step of replacing the first subscriber identification module with the second subscriber identification module, wherein said information is provided for said notification.

Preferably said first identification module is a software identification module comprising software code which is executable on the mobile terminal. The second identification module is a second subscriber identification module, wherein said notification is submitted upon or shortly after the step of inserting said second subscriber identification module into the mobile terminal.

Preferably said first identification module is a software identification module comprising software code which is executable on the mobile terminal and once the mobile terminal is switched on, a connection to the packet switched network via the software module is established such that said notification is sent to the routing table.

Further preferred embodiments are described within the dependent claims.

Brief description of the drawings

The drawings will be explained in greater detail by means of a description of an exemplary embodiment, with reference to the following figures:

FIG. 1 shows a schematic illustration of a native network A and foreign networks B and C with the respective features and terminals;

Fig. 2 shows a schematic illustration of a mobile terminal and its features; 3

Fig. 3 shows an example of the routing table which is arranged in the routing module as shown in figure 1 ;

Fig. 4 shows a more detailed view of figure 1 ; and

Fig. 5 illustrates the database structure in the soft server internet gateway of figure 4.

Detailed description of the preferred embodiments

Figure 1 shows a schematic illustration of a communication system which can be operated according to the method of the present invention.

Network A is considered as being the network of country A and the network is operated by the phone company A. Network A comprises a terminal 1, such as a mobile phone, a land line phone, a personal digital assistant or a computer device such as a laptop. The elliptic line 120 illustrates the border of country A and network A. Network A can also be designated as first network.

The first network A comprises at least a routing module 3 which comprises a routing table 30. Said routing module 3 routes a potential call 6 from terminal 1 as described below. Said potential call 6 may be a phone call or the transmission of data such as an SMS or any other message.

Network B is the network of country B being preferably different from country A. Network B is operated by the phone company B. The elliptic line 110 illustrates the border of network B. Network B can also be designated as second network. In the domain of the second network B there is a terminal 2, preferably a mobile terminal 2. The mobile terminal 2 can be a mobile phone, a personal digital assistant or a computer device.

Furthermore network C of country C being preferably different from countries A and B is operated by phone company C. Network C can be considered as a third network.

The networks are in connection with a packet switched network 4 such as the internet. Furthermore the networks can be connected together by means of an other network link illustrated by broken arrow 5. The first network is the home or native network of the user of the second terminal which is pref^¬ erably a mobile terminal 2. In the present embodiment the user is abroad which means that the mobile terminal 2 is in the domain of the second network B.

The mobile terminal 2 as shown in figure 2 comprises a first identification module 20 here shown with reference numerals 20a, 20b which comprises an identifier having an identity provided by the operator of network A and a software module 21 comprising software to be connected to a packet switched network 4. Furthermore it comprises means such as an antenna 29 in order to allow a connection to the networks as mentioned herein.

The first identification module 20, 20a, 20b serves as a mean to determine that there is contractual connection between the user of mobile phone 2 and the phone company A of the first network A. This means that the user of mobile terminal 2 is a customer of phone company A.

The first identification module 20 can be a subscriber identity module (SIM-Card) 20a issued by the phone company of network A. Said subscriber identity module 20a is inserted into a corresponding card holder 24 of mobile terminal 2.

Alternatively the first identification module 20 can be a software identification module 20b that is provided by the phone company of network A. Thereby the software identification module has to be installed on the mobile terminal 2. When the software identification module 20b shall be actuated the user can identify himself for example by means of a user name and a password visa-vis the software identification module 20b. In a preferred embodiment is possible that the software identification module 20b is sent as a data package from the phone company A to the mobile terminal 2 on which said software identification module has to be installed. This means that user of mobile terminal 2 can order said software identification module from phone company A via a customer care centre which can be contacted by telephone or via a website. Thereby the software identification module 20b is provided over the air via a GSM network or a wireless local area network, via e-mail or via a download website.

If the first identification module 20 is the software identification module 20b the mobile terminal has to be provided with a module into which a second identity module 23 of the network of the foreign country can be introduced or changed. In another embodiment it is also possible that the second identification module is a second software identification module.

Irrespective of the use of the subscriber identity module 20a or of software identification module 20b the mobile terminal 2 can also comprise memory means 28 into which the information concerning the contractual situation or a link respectively between the user of the mobile terminal 2 and the phone company A is stored. Once for example the subscriber identity module 20a of phone company A is exchanged with a subscriber identity module 23 of phone company B, the information of the contractual situation between the user of the mobile terminal 2 and phone company A remains stored in mobile terminal 2 and can be retrieved afterwards.

hi case only the software identification module 20b is arranged, said software identification module 20b is stored in memory means 28. Said memory means 28 are part of the mobile terminal.

The software module 21 serves as already mentioned to be connected to the packet switched network such as the internet 4. Via said connection a notification from the mobile terminal 2 to the first network A as described below is submitted. Thereby an BP-address is allocateable to the software module 21.

When the user of mobile terminal 2 intends to travel from his home country (i.e. country A) to a foreign country (i.e. country B), a second identification module 23 of the network of the foreign country is brought into connection with mobile terminal 2. Alternatively it is also possible that the user of mobile phone would like to change the operator in his home country for costs reason or better coverage of a remote area by a second phone company. This is illustrated in figure 1 with mobile terminal 2 in network A.

When the user wants to change the operator mainly three scenarios a), b) or c) apply:

a) Physical exchange

The first subscriber identification module 20a of network A is replaced by a second subscriber identification module 23 of network B. That is the first subscriber identification module 20a is removed from the mobile terminal 2 and a second subscriber identification module (SM-Card B) 23 of the foreign network B is introduced into the card holder 24 of mobile terminal 2. The memory means 28 comprises thereby the information that the user of mobile terminal 2 is in a contractual situation with phone company A. For the step of replacing the subscriber identification modules 20a, 23 it does not matter, in which domain the mobile terminal 2 is. Meaning that the mobile terminal 2 can still be in the domain of network A or already in the domain of network B or in the domain of network C. In figure 1 and 2 this process is shown by arrow 22. As soon as the mobile terminal 2 recognizes said subscriber identification module 23 and the mobile terminal 2 is in connection via its software module 21 with the internet 4 a notification 40 is sent via the internet 4 to the routing module 3 of the network A.

b) Virtual exchange

A second subscriber identification module (SEVI-Card B) 23 of the foreign network B is introduced into the card holder 24 of mobile terminal 2. hi this scenario the link between the contractual situation of the user of mobile terminal 2 and phone company A is established by means of software identification module 20b. As soon as the mobile terminal 2 recognizes said subscriber identification module 23 and the mobile terminal 2 is in connection via its software module 21 with the internet 4 a notification 40 is sent via the internet 4 to the routing module 3 of the network A. The difference to scenario a) is mainly that here no physical subscriber identification module of network A is involved, but there the software identification module 20b which establishes the contractual link to network A.

c) Virtual registration

In this scenario mobile terminal the user of mobile terminal 2 is for example in network C and does not have a subscriber identification module of network C. This means with other words that the mobile terminal 2 is not registered with a conventional subscriber identification module in network C. However, mobile terminal 2 is connected by means of the software module 21 via an IP-Network such as a WLAN to the internet 4. The software identification module 20b which is provided by the provider of network A identifies the mobile terminal 2 as being a mobile terminal of a user having a contract with phone company A.

Once the mobile terminal 2 is switched on, it is connected to network A via an IP-network such as the internet 4. Therefore a connection to the home network A of the mobile terminal 2 is made via the internet 4. Furthermore a notification 40 is sent to the routing module 3 that the mobile terminal 2 can be reached via a voice over ip connection.

For enhanced security it could be necessary for all scenarios a) to c) that the user has to identify himself vis-a-vis the software identification module 23 by entering a username and a password. Thereby the system will check if the entered information is correct.

Said notification 40 as mentioned in connection with scenario a) to c) comprises information concerning the identity of the first identification module 20, 20a, 20b and of the second identification module 23 or the software module 21, respectively. This means with other words that the notification 40 comprises the information to establish a correlation or a link between the first identification module 20 of network A and the second identification module 23 of network B. The notification 40 can also be designated as routing notification 40. The notification 40 comprises the information that the first identification module 20 has been replaced by the second identification module 23 which allows the conclusion that mobile terminal 2 has now the identity of the second identification module 23 wherein a link between the first identification module 20 and the second identification module 23 can be established.

The information concerning the link between the first identification module 20 and the second identification module 23 as comprised in said notification is saved in a routing table 30 of the routing module 3. The routing table 30 is queried once a call request or a request to send data is being made from the first terminal 1 to the mobile terminal 2. Thereby the call is being forwarded or routed based on the information stored in the routing table 3.

Optionally the notification 40 can further comprise the information concerning the best or desired routing path to mobile terminal 2. Said information can either be provided by the user by choosing an appropriate function or automatically by the mobile terminal itself. One possible criteria is that when the mobile terminal 2 is in the domain of a wireless local are network, the preferred routing path is via the internet 4. Therefore the mobile terminal 2 acts as a voice-over- ip device. This means that once the call is initiated by terminal 1 the routing table is queried in view of allocation of the identification module as well as in view of the preferred routing path. Thereby the voice-over-ip path has a higher priority than the GSM path, as costs for the caller will be lower. It has to be noted that notification 40 is sent shortly after a change of the identity module according to any of the scenarios a) to c).

Furthermore it has to be noted that when the user of mobile terminal 1 intends to call the user of mobile terminal 2 being in the foreign network B and in connection according to the scenarios a) to c) no further roaming costs are involved here, when the user is in connection with via the internet.

A call may also be initiated from mobile terminal 2 being in the domain of foreign network B in the sense as described herein. This means that the user of mobile terminal 2 can enter a phone number of mobile terminal 1 being in network A and the call will be routed according to the connection to the respective network of mobile terminal 2.

hi further embodiment network A comprises additionally a location module with a location table, hi an analogue manner to the notification 40 a location notification is sent to the location module, hi particular it is possible that once the mobile terminal 2 is switched on, its IP-address is sent by means of said location notification to the location table. The IP-address is then stored in said table. Starting from the IP-address one is able to make a conclusion on the location of the mobile terminal 2. Thereby it is possible to send location based information to the mobile terminal to the latter. Location based information can be an advertisement of a local service or shop. Additionally it is also possible to include the location information into the routing table by means of notification 40 or a different notification.

Figure 3 shows a schematic illustration of the routing module 3 with the routing table 30. The first column 31 comprises the identification information of the first identification module 20 of the mobile terminal 2. The identification information relates for example to the phone number of the mobile terminal 2 as provided by the operator of network A. This is represented by the number 123 456 which can be a Mobile Subscriber Integrated Services Digital Network Number (MSISDN A) or an international mobile subscriber identifier code (IMSI A). The routing table 30 can be stored in a memory mean that is arranged in the routing module 3.

The second column 32 comprises the identification information of the second identification module 23 that is provided by the provider of network B. This means that the information of the second subscriber identification module 23 of network B will be stored in this column 32. This is shown by number 456 789 which can be a Mobile Subscriber Integrated Services Digital Network Number (MSISDN B) or a international mobile subscriber identifier code (IMSI B). The latter can be included into the virtual location registry 303 as shown in figure 5

Once the user of the first terminal 1 initiates a call to the second terminal 2, the routing module 3 questions the first column 31 in order to determine, if the mobile terminal is registered in the routing module. If the identification of mobile terminal 2 is present in the routing table 30 the second column 32 will be queried in order to determine the identification information of the second subscriber identification module 23.

In the optionally arranged column 33 the information concerning the preferred routing path is stored as mentioned above. In the first row the preferred routing path is via voice-over-ip as indicated with VOIP in column 33. This means that the routing module 3 stores availability information concerning the availability status of the terminal 2 being in the foreign network B.

A further feature which can be included into the routing table are customer related information as it is described below. Said customer related information allow the use of further services such as conference calls, forwarding of a call etc.

The main advantage of the present invention is that the user of mobile terminal 2 is reachable under the phone number of his home network such as network A and that due to the fact that a subscriber identification module 23 of the foreign network B is used no roaming fees are due for the user A in case he would like to establish the connection via the GSM-network of network B. With the notification comprising also the preference concerning the availability of the mobile terminal (i.e. via GSM network or via VOIP-network) the cost may also be reduced for the terminal 1 initiating the call.

The features as just described are also applicable, if the mobile terminal is located in network C for example. The user of mobile terminal 7 is in the domain of network C. The first identification module 70 will be replaced (see reference numeral 72 in Figure 1) by the second identification module 70' which is an identification module provided by the operator of network C. The notification 40 is then sent via the internet to the routing module 3. Furthermore it has to be mentioned here that the user being in country C and is a customer of network B can also connect to network B by means of the technique as described herein. The same applies when the user is in network A.

Furthermore it is possible to connect three users which are in three different networks in a phone conference. One of the networks, for example network A serves as a hub. Thereby the other users connect to network A according to the three scenarios as mentioned above and are able to log in to a phone conference.

Figure 4 shows a more detailed view of a system in which the method of the present invention can be established. Same features are designated with same reference numerals.

Network A is connected with network B by means of a packet switched network 4 which is here in connection via a communication line 123 with a gateway 121, here a soft server gateway with network A and which is in connection via a communication line 116 with a GPRS-Module 113 with network B. The packet switched network 4 is preferably the internet. Alternatively the two networks A and B or C, respectively, may also be connected via another channel 5. The mobile terminal can be connected to the internet directly.

In network A two terminals which are equivalent to terminal 1 in figure 1 are shown, namely a mobile phone 135 and a landline phone 142. The mobile phone 135 is connected via a base station centre (BSC) 134 to a mobile switching centre (MSC) 131 of network A from which various kinds of data will be switched to the respective receivers. The user of mobile phone 135 has a contract with company A which means that the user of mobile phone 135 is in the domain of his usual home or native network. The landline phone 142 is connected via a public switched telephone network 141 via a gateway mobile switching centre (not shown) to the mobile switching centre (MSC) 131.

Said routing module 3 can be arranged in the mobile switching center 131 and/or within the soft server gateway 121. The routing module 3 takes the decision via which path data such as a call or a SMS-Message shall be routed to mobile phone 2 being here in domain of the network B. A first path is a conventional roaming connection between terminals in network A and the mobile phone 2 in network B. A second path can be a voice-over-ip connection to mobile phone 2.

As mentioned above the mobile terminal 2 comprises a first identification module 20 and a soft^¬ ware module 21. Said first identification module 20 will be replaced by a second identification module 23 as explained above with regard to the three scenarios a) to c).

When the terminal 2 is in the domain of the foreign network B it provides by means of notification 40 also the above mentioned availability information for the routing module 3 of network A. Said information can be provided in predefined period intervals or upon a certain event such as a change in the availability status of the terminal or upon a user's request. The availability status depends on the type of connections which are available for the mobile terminal 2 in network B:

The table above shows that the preferred routing path is always via the packet switched network 4 as this is cost-effective routing path. With other words: The table above is a priority table which defines the priority how a call shall be established.

When the user of mobile phone 135 or landline phone 142 being in the domain of network A (i.e. in the home network) tries to call the user of mobile terminal 2 being in the domain of network B (i.e. in the foreign network) the mainly two scenarios can apply. In the first scenario the mobile phone 2 has been allocated an international mobile subscriber identifier (IMSI). hi the second scenario no international mobile subscriber identifier (IMSI) has been allocated to the mobile phone 2.

First of all the call will be routed from the mobile phone 135 via the base station centre 134 or from the landline telephone 142 via the public switching telephone network (PSTN) 142, respectively 134 to the mobile switching centre 131. As soon as this step has been completed the routing module 3 is queried in order to determine the best routing path to mobile phone 2. In this case the best routing path is the one which is the less cost effective.

hi this embodiment the routing module comprises a table as shown in figure 3. The column 31 having the title Mobile Subscriber Integrated Services Digital Network Number (MSISDN) comprises the numbers of the available mobile terminals, here mobile terminal 2 being in the domain of network B. Column 33 comprises codes relating to the availability of the respective mobile phone. There are two different states possible in the present example: conventional connection via a GSM. Network or VOIP leading to the following routes of the call:

A.) The first state GSM indicate that the call shall be routed via the Internet 117 via conventional GSM-elements, such as the GPRS module 113, the MSC 111 and the BSC 114 to mobile phone 2. Thereby the call is received via the second subscriber identity module 23 provided by network B.

B.) The second state VOIP indicates that the call shall be routed from the soft server gateway via the internet 4 to mobile terminal 2. In that state the mobile terminal 2 receives the call via the software module 21. Thereby the data can be sent over WiFi₃ WLAN₃ or any other internet path. When the software module 21 is activated, the mobile switching centre 131 connects the call to the soft server gateway 121 and then to the BP address being created in the soft server database located in the soft server (See Figure 5) after encapsulating it from SS7 signals into IP packets where the call will be connected to the mobile telephone 2 in network B.

It has to be noted that GSM is used synonymous as connection techniques for any other possible techniques.

This means with other words, that the mobile terminal 2 has a GSM-Status where it will be reached via the GSM-network or a VOIP-status where it will be reached via the internet 117 di- rectly. The decision which route will be chosen is made by querying the routing table 3.

Generally the mobile terminal 2 can be operated in different modes which will be submitted from the mobile terminal 2 to the routing table in the home network A. The status of the mobile terminal 2 is saved in said routing table as mentioned above. The routing table can be arranged in the soft server gateway and/or in the mobile switching centre 131.

Figure 5 shows the database structure in the soft server internet gateway of figure 4. hi said soft server gateway 304, relational database is designed to identify the user's mobile terminal and the location registry for the GSM System. Other tables may be added or deleted depending on the features. On the virtual authentication 301 a database is designed to save and retrieve the information of the identification of the identification modules, preferably of the software identification modules 20b, based for example on the mobile number login name and password. It is thinkable that new users from other countries that need to buy a number from a specific GSM provider company will need to fill out the electronic form in order to be able to have a user and password with the application (Responsible for connecting the user to the home GSM provider as if he is inside his home GSM Network), hi the softserver database 302 further parameters such as an ip address, a mobile number can be saved.

Li the following features or services are described which can be provided by means of the techniques as described above, in particular by means of the routing table and/or the location table.

The owner of the of mobile terminal 2 can activate several other mobile terminal to ring at the same time and who ever answers first (e.g George) can get the call where others will be noticed that "George" has received the call. Said notice can be stored in the location module or in the routing module for example. This feature is applicable and can be done by creating several IP addresses for the same MSISDN in the Soft Server database. This feature should get a permission command from the owner of the number (MSISDN).

Furthermore users of mobile terminal can be given the ability to receive their SMS or MMS messages on several activated software identification modules. This is done by adding a table on the Soft Server that will store the chosen numbers that the person needs to put an SMS copy to. Thus, chosen numbers can receive SMS and MMS at the same time and with a cost of only one SMS or MMS.

A further feature is that the user can put several "Reason for the call" categories which can be stored in one of the tables as mentioned above. This feature is to get from the caller a specified reason that he will give when he tries to attempt a call to the user of mobile terminal 2. For instance emergency, family, an old friend, saying hi... etc. hi order to activate this service the user of mobile terminal has to consult a website and activate the service, then choose the specified reasons and attached it with the extension numbers as described below. The Soft Server will reserve the call then will not connect a voice conversation directly but rather it will connect it to an interactive voice respond system (IVR) where the IVR system will ask the caller what is the reason of your call? Press number 1 if it is emergency, press 2 if it is a family reason ...etc. Then, when the caller push the required number the FVR system receives his input then connects his call to the IP address to connect his call to the mobile terminal 2. When the mobile terminal rings it will show the reason of the call that the caller chosen, hi order to use this features a table is added to the Soft Server and program it via known programming techniques. Preferably the message concerning the reason for the call is submitted via internet 7 in an analogue manner as notification 40, but vice-versa.

All other Services (MMS, SMS, Video calls ..etc) and future service will be implemented in the same way as the voice call is implemented and mentioned above, it may need some programming implementations in the Soft Server side and an updated version for the software identification module, hi other words, the Soft server gateway will transfer any data to the activated software identification module by connecting it to the right IP address as described above and by the help of the MSC routing tables mentioned previously that will guide the flow to the required and desired user. Data may reach the software identification module user through implementing known VOIP protocols and technologies as in H.323 or SIP ...etc

hi most GSM provider's practices, SMS doesn't stay suspended in the network for more than 72 hours in its best circumstances this is to make the traffic breath better. But now and with the help of the Soft Server the message can stay for months waiting for user to activate his number as mentioned above with the three scenarios a) to c). Or as another option the SMS is sent to the physical subscriber identification module if it was activated instead of the software identification module while the SMS was suspended. When the physical subscriber identification module is activated the routing tables in the MSC will be updated, then the IP address which is connected to the MSISDN in the Soft Server database will be automatically terminated and deleted. This is the sign where the message will notice that the physical subscriber identification module has been activated and will resend it back again to the GSM network to take its procedure to reach the physical subscriber identification module owner. This solution and feature will prevent high- traffic load on the GSM network and will extend the SMS life in the network.

The user can use as much software identification modules from other networks as he wants as long as the GSM Provider provides such a service. So the invention can give the user the opportunity to carry multiple activated numbers at the same time by using only one device and preferably one physical subscriber identification module or a software identification module.

The user of the software identification module can divert the call(voice, video ...etc) or mes- sages(SMS, MMS ...etc) to any other user of a software identification module without charging him a diverting calling cost. This is done by adding a diverting table. The table comprises: MSISDN of the diverter, MSISDN of the person who will receive the call, activated IP address and permission to divert. The new feature is the "permission to divert" feature which is the last attribute in the table as mentioned. It goes as follows, the user of the software identification module who should receive the calls or messages instead of the diverter, will receive a notice on his mobile telling him and announcing that "the mobile number **_**_****** wants to divert his mobile number to yours, Please dial number 1 if it is ok or dial 2 if not". When the receiver dials 1, the attributes in the table will be filled out with the required information. If the Diverter was about to receive a call, the Soft Server will connect and establish a voice call to another IP address depending on the MSISDN which was provided by the diverter. If the receiver dials 2, the request will be canceled and the requester will be noticed on that. For messages, the user of the software identification module who should receive the calls instead of the diverter, will receive a notice on his mobile telling him and announcing that "the mobile number **.**_****** wants to divert his SMS or MMS to your mobile, Please dial number 1 if it is ok or dial 2 if not". When the receiver dials 1, the attributes in the table will be filled out with the required information. If the diverter was about to receive an SMS or MMS, the Soft Server will connect and send the message to another IP address depending on the MSISDN which was provided by the diverter. If the receiver dials 2, the request will be canceled and the requester will receive a message notice, announcing that the request to divert was canceled. List of reference numerals 22 arrow

A first network 23 second subscriber identity module

B second network 24 reading device

1 terminal in network A

2 mobile terminal 110 border of network B

3 routing module 116 communication line

4 internet 117 packet switched network

5 network link 120 border of network A

6 potential call 121 soft server gateway 123 communication line

30 routing table 130 cellular network

40 notification 131 mobile switching centre (MSC)

20 first identification module 134 base station centre (BSC)

20a subscriber identity module 135 mobile phone

20b software identification module 141 public switched telephone network

21 software module 142 landline phone

Claims

1. Method to route a call from a first terminal (1) being in connection with a first network (A) to a mobile terminal (2) being in connection with a second network (B), wherein the first network comprises a routing module (3) having a routing table (30); wherein the mobile terminal (2) comprises at least a first identification module (20) provided with an identity (ID A) of the first network (A) and a software module (21) comprising software to be connected to a packet switched network (4); wherein a second identification module (B) that is provided with an identity (ID B) of the second network (B) is provided for the mobile terminal (2); wherein upon the second identification module (B) is in connection with the mobile terminal (2) a notification (40) is sent from the mobile terminal (2) via the packet switched network (4) to the routing module (3), wherein the notification (40) comprises information concerning the identity of the first identification module (A) and of the second identification module (B); wherein said notification is stored in said routing table (30) in a manner that a correlation between the first module (A) and the second module (B) can be established (31) and wherein said routing table (30) is queried once a call is being made from the first terminal (1) to the mobile terminal (2) and wherein the call is being forwarded based on the information stored in the routing table (3).

2. Method according to claim 1, characterized in that the first identification module is a first subscriber identification module (20a) and the second identification module (B) is a second subscriber identification module (23), wherein said notification (40) is submitted upon the step of replacing said first subscriber identification module (20a) with said second subscriber identification module (23).

3. Method according to claim 2, characterized in that information with regard to the first subscriber identification module (20a) is stored in a memory means (28) of the mobile terminal (2) before the step of replacing the first subscriber identification module (20a) with the second subscriber identification module (23), wherein said information is provided for said notification (40).

4. Method according to claim 1, characterized in that the first identification module is a software identification module (20b) comprising software code which is executable on the mobile terminal (2) and in that the second identification module (B) is a second subscriber identification module (23), wherein said notification (40) is submitted upon the step of inserting said second subscriber identification module (23) into the mobile terminal (2).

5. Method according to claim 1, characterized in that the first identification module is a software identification module (20b) comprising software code which is executable on the mobile terminal (2) and in that once the mobile terminal (2) is switched on, a connection to the packet switched network (4) via the software module (21) is established such that said notification is sent to the routing table (30).

6. Method according to any of the preceding claims, characterized in that said notification (40) comprises further the information about the preferred path of availability of the mobile terminal (2) and in that said information about the preferred path of availability is stored in said routing table wherein a connection between the first terminal (1) and the mobile terminal (2) is routed according to this information.

7. Method according to any of the preceding claims, characterized in that the method comprises the step of identification with which the user has to identifiy himself vis-a-vis the software identification module.

8. Method according to any of the preceding claims, characterized in that the software identification module is provided by the operator of the first network and is submitted over the air to the mobile terminal or a wired internet connection.

9. Method according to any of the preceding claims, characterized in that the second identification module can be obtained by the user of the mobile terminal (2) from the operator of the first network, wherein said module is submitted to the mobile terminal over the air or via a wired internet connection, irrespective of the location of the mobile terminal (2).

10. Method according to any of the preceding claims, characterized in that an IP- Address is assigned to the mobile terminal, wherein said IP-address is stored in said routing table.

11. Method according to any of the preceding claims, characterized in that the routing table is updated on predefined intervals or upon a change of the availability of the mobile terminal (2).

12. Method according to any of the preceding claims, characterized in that the routing table (30) of the routing module (3) is queried once a call is initiated by the mobile terminal (2) in order to establish the call with an identification referring to the mobile terminal (2).

13. Computer program product comprising a routing module and a routing table according to any of the preceding claims.