Method and system for determining the location of a mobile radiocommunication subscriber registered in a cellular mobile radiotelephone network

Abstract

A lower signaling load and a shorter connection setup time in relation to the known two-stage location request is achieved with an optimal routing in that upon receiving the message (SRIL) for the location request the home register (HLRB) itself checks the feasibility of the setup of the direct connection between the gateway mobile switching center (GMSCA) of a first network (IPLMN) and the visited mobile switching center (VMSCB) of another network (VPLMN) for reasons of the charging of the call. Given a positive test result a modified message additionally containing a flag (PRN) for the request of a temporary mobile subscriber roaming number (MSRN) is sent to the visitor register (VLRB). The home register can determine the feasibility of the connection setup for charging of the call after the first receipt of a location request and can immediately (that is without waiting for a new location request by the gateway mobile switching center) call the mobile subscriber roaming number from the responsible visitor register and send it to the requesting gateway mobile switching center.

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Technology	Declaration Information			Specification Information	Explicitly Disclosed	Patent Type
Technology	Declaration Date	Declaration Reference	Declaring Company	Specification Number	Explicitly Disclosed	Patent Type
2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 103 18 v6.5.0 Version No: v6.5.0 Illustrative part: ---- Release: 6 S2 TS Number: TS 103 79 v5.2.0 Version No: v5.2.0 Illustrative part: ---- Release: 5 +1 -1	No	Family Member
2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 103 79 v5.2.0 Version No: v5.2.0 Illustrative part: ---- Release: 5 + -	Yes	Basis Patent
3G,2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 123 079 v3.3.0 Version No: v3.3.0 Illustrative part: ---- Release: 3 + -	No	Family Member
3G,2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 123 079 v3.3.0 Version No: v3.3.0 Illustrative part: ---- Release: 3 + -	Yes	Basis Patent
3G,2G	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 079 Version No: Illustrative part: ---- Release: + -	No	Family Member
3G,2G	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 079 Version No: Illustrative part: ---- Release: + -	Yes	Basis Patent
4G,3G,2G	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 018 Version No: Illustrative part: ---- Release: + -	No	Family Member
4G,3G,2G	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 018 Version No: Illustrative part: ---- Release: + -	Yes	Basis Patent
Not Available	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 018 Version No: Illustrative part: ---- Release: S2 TS Number: TS 123 079 Version No: Illustrative part: ---- Release: +1 -1	No	Family Member
Not Available	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 018 Version No: Illustrative part: ---- Release: S2 TS Number: TS 123 079 Version No: Illustrative part: ---- Release: +1 -1	Yes	Basis Patent

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2G 3G 4G 5G

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Publication No	Technology	Declaration Information			Specification Information	Explicitly Disclosed	Patent Type
Publication No	Technology	Declaration Date	Declaration Reference	Declaring Company	Specification Number	Explicitly Disclosed	Patent Type
DE19635581C1	2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 103 18 v6.5.0 Version No: v6.5.0 Section No: Release : 6 S2 TS Number: TS 103 79 v5.2.0 Version No: v5.2.0 Section No: Release : 5 +1 -1	Yes	Basis Patent
DE19635581C1	3G,2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 123 079 v3.3.0 Version No: v3.3.0 Section No: ---- Release : 3 + -	Yes	Basis Patent
DE19635581C1	2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 103 79 v5.2.0 Version No: v5.2.0 Section No: ---- Release : 5 + -	No	Family Member
DE19635581C1	3G,2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 123 079 v3.3.0 Version No: v3.3.0 Section No: ---- Release : 3 + -	No	Family Member
DE19635581C1	3G,2G	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 079 Version No: ---- Section No: ---- Release : ---- + -	Yes	Basis Patent
DE19635581C1	4G,3G,2G	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 018 Version No: ---- Section No: ---- Release : ---- + -	Yes	Basis Patent
DE19635581C1	Not Available	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 018 Version No: ---- Section No: Release : ---- S2 TS Number: TS 123 079 Version No: ---- Section No: Release : ---- +1 -1	Yes	Basis Patent
DE19635581C1	3G,2G	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 079 Version No: ---- Section No: ---- Release : ---- + -	No	Family Member
DE19635581C1	4G,3G,2G	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 018 Version No: ---- Section No: ---- Release : ---- + -	No	Family Member
DE19635581C1	Not Available	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 018 Version No: ---- Section No: Release : ---- S2 TS Number: TS 123 079 Version No: ---- Section No: Release : ---- +1 -1	No	Family Member
JP2977154B2	2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 103 79 v5.2.0 Version No: v5.2.0 Section No: ---- Release : 5 + -	Yes	Basis Patent
JP2977154B2	3G,2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 123 079 v3.3.0 Version No: v3.3.0 Section No: ---- Release : 3 + -	Yes	Basis Patent
JP2977154B2	2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 103 18 v6.5.0 Version No: v6.5.0 Section No: Release : 6 S2 TS Number: TS 103 79 v5.2.0 Version No: v5.2.0 Section No: Release : 5 +1 -1	No	Family Member
JP2977154B2	3G,2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 123 079 v3.3.0 Version No: v3.3.0 Section No: ---- Release : 3 + -	No	Family Member
JP2977154B2	3G,2G	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 079 Version No: ---- Section No: ---- Release : ---- + -	Yes	Basis Patent
JP2977154B2	4G,3G,2G	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 018 Version No: ---- Section No: ---- Release : ---- + -	Yes	Basis Patent
JP2977154B2	Not Available	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 018 Version No: ---- Section No: Release : ---- S2 TS Number: TS 123 079 Version No: ---- Section No: Release : ---- +1 -1	Yes	Basis Patent
JP2977154B2	3G,2G	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 079 Version No: ---- Section No: ---- Release : ---- + -	No	Family Member
JP2977154B2	4G,3G,2G	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 018 Version No: ---- Section No: ---- Release : ---- + -	No	Family Member
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CN1086900C	2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 103 79 v5.2.0 Version No: v5.2.0 Section No: ---- Release : 5 + -	Yes	Basis Patent
CN1086900C	3G,2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 123 079 v3.3.0 Version No: v3.3.0 Section No: ---- Release : 3 + -	Yes	Basis Patent
CN1086900C	2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 103 18 v6.5.0 Version No: v6.5.0 Section No: Release : 6 S2 TS Number: TS 103 79 v5.2.0 Version No: v5.2.0 Section No: Release : 5 +1 -1	No	Family Member
CN1086900C	3G,2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 123 079 v3.3.0 Version No: v3.3.0 Section No: ---- Release : 3 + -	No	Family Member
CN1086900C	3G,2G	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 079 Version No: ---- Section No: ---- Release : ---- + -	Yes	Basis Patent
CN1086900C	4G,3G,2G	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 018 Version No: ---- Section No: ---- Release : ---- + -	Yes	Basis Patent
CN1086900C	Not Available	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 018 Version No: ---- Section No: Release : ---- S2 TS Number: TS 123 079 Version No: ---- Section No: Release : ---- +1 -1	Yes	Basis Patent
CN1086900C	3G,2G	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 079 Version No: ---- Section No: ---- Release : ---- + -	No	Family Member
CN1086900C	4G,3G,2G	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 018 Version No: ---- Section No: ---- Release : ---- + -	No	Family Member
CN1086900C	Not Available	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 018 Version No: ---- Section No: Release : ---- S2 TS Number: TS 123 079 Version No: ---- Section No: Release : ---- +1 -1	No	Family Member
CN1180285A	2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 103 79 v5.2.0 Version No: v5.2.0 Section No: ---- Release : 5 + -	Yes	Basis Patent
CN1180285A	3G,2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 123 079 v3.3.0 Version No: v3.3.0 Section No: ---- Release : 3 + -	Yes	Basis Patent
CN1180285A	2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 103 18 v6.5.0 Version No: v6.5.0 Section No: Release : 6 S2 TS Number: TS 103 79 v5.2.0 Version No: v5.2.0 Section No: Release : 5 +1 -1	No	Family Member
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CN1180285A	Not Available	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 018 Version No: ---- Section No: Release : ---- S2 TS Number: TS 123 079 Version No: ---- Section No: Release : ---- +1 -1	Yes	Basis Patent
CN1180285A	3G,2G	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 079 Version No: ---- Section No: ---- Release : ---- + -	No	Family Member
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EP0827355A2	2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 103 79 v5.2.0 Version No: v5.2.0 Section No: ---- Release : 5 + -	Yes	Basis Patent
EP0827355A2	3G,2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 123 079 v3.3.0 Version No: v3.3.0 Section No: ---- Release : 3 + -	Yes	Basis Patent
EP0827355A2	2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 103 18 v6.5.0 Version No: v6.5.0 Section No: Release : 6 S2 TS Number: TS 103 79 v5.2.0 Version No: v5.2.0 Section No: Release : 5 +1 -1	No	Family Member
EP0827355A2	3G,2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 123 079 v3.3.0 Version No: v3.3.0 Section No: ---- Release : 3 + -	No	Family Member
EP0827355A2	3G,2G	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 079 Version No: ---- Section No: ---- Release : ---- + -	Yes	Basis Patent
EP0827355A2	4G,3G,2G	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 018 Version No: ---- Section No: ---- Release : ---- + -	Yes	Basis Patent
EP0827355A2	Not Available	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 018 Version No: ---- Section No: Release : ---- S2 TS Number: TS 123 079 Version No: ---- Section No: Release : ---- +1 -1	Yes	Basis Patent
EP0827355A2	3G,2G	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 079 Version No: ---- Section No: ---- Release : ---- + -	No	Family Member
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EP0827355A3	3G,2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 123 079 v3.3.0 Version No: v3.3.0 Section No: ---- Release : 3 + -	Yes	Basis Patent
EP0827355A3	2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 103 18 v6.5.0 Version No: v6.5.0 Section No: Release : 6 S2 TS Number: TS 103 79 v5.2.0 Version No: v5.2.0 Section No: Release : 5 +1 -1	No	Family Member
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EP0827355A3	4G,3G,2G	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 018 Version No: ---- Section No: ---- Release : ---- + -	Yes	Basis Patent
EP0827355A3	Not Available	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 018 Version No: ---- Section No: Release : ---- S2 TS Number: TS 123 079 Version No: ---- Section No: Release : ---- +1 -1	Yes	Basis Patent
EP0827355A3	3G,2G	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 079 Version No: ---- Section No: ---- Release : ---- + -	No	Family Member
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EP0827355B1	3G,2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 123 079 v3.3.0 Version No: v3.3.0 Section No: ---- Release : 3 + -	Yes	Basis Patent
EP0827355B1	2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 103 18 v6.5.0 Version No: v6.5.0 Section No: Release : 6 S2 TS Number: TS 103 79 v5.2.0 Version No: v5.2.0 Section No: Release : 5 +1 -1	No	Family Member
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EP0827355B1	4G,3G,2G	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 018 Version No: ---- Section No: ---- Release : ---- + -	Yes	Basis Patent
EP0827355B1	Not Available	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 018 Version No: ---- Section No: Release : ---- S2 TS Number: TS 123 079 Version No: ---- Section No: Release : ---- +1 -1	Yes	Basis Patent
EP0827355B1	3G,2G	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 079 Version No: ---- Section No: ---- Release : ---- + -	No	Family Member
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ES2276412T3	2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 103 18 v6.5.0 Version No: v6.5.0 Section No: Release : 6 S2 TS Number: TS 103 79 v5.2.0 Version No: v5.2.0 Section No: Release : 5 +1 -1	No	Family Member
ES2276412T3	3G,2G	21/02/2001	ISLD-200107-007	SIEMENS AG	S1 TS Number: TS 123 079 v3.3.0 Version No: v3.3.0 Section No: ---- Release : 3 + -	No	Family Member
ES2276412T3	3G,2G	28/07/2003	ISLD-200308-002	SIEMENS AG	S1 TS Number: TS 123 079 Version No: ---- Section No: ---- Release : ---- + -	No	Family Member
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Publication No	Technology	Declaration Information			Specification Information				Explicitly Disclosed	Patent Type	Status	National Phase Entries
Publication No	Technology	Declaration Date	Declaration Reference	Declaring Company	Specification Information				Explicitly Disclosed	Patent Type	Status	National Phase Entries
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Technologies

Connection Establishment/Control

Product

Not Available

Use Cases

Not Available

Services

Not Available

Claim

1. A method for determining a location of a mobile subscriber registered in a cellular mobile radiotelephone network for an optimal routing given a mobile terminated call directed to the mobile subscriber, comprising the steps of:sending, based on a subscriber call number of a called mobile subscriber, a message for a location request, across networks, from a gateway mobile switching center of a first network to a home register of a second another network in which the mobile subscriber is permanently registered with subscriber data of the mobile subscriber; sending a message from the home register for the location request to a visitor register of a further network, in which the mobile subscriber is currently registered based on a current location of the mobile subscriber; allocating a visited mobile switching center to the visitor register; determining for optimal routing, if a direct connection is established between the gateway mobile switching center and the visited mobile switching center with respect to charging of the call; checking, upon receipt of the location request message from the home register, feasibility of a setup of the direct connection and providing a test result indicative thereof; sending if the test result is positive indicating that a direct route is establishable, a modified message, additionally containing a flag for a request of a temporary mobile subscriber roaming number, to the visitor register.', 'sending, based on a subscriber call number of a called mobile subscriber, a message for a location request, across networks, from a gateway mobile switching center of a first network to a home register of a second another network in which the mobile subscriber is permanently registered with subscriber data of the mobile subscriber;', 'sending a message from the home register for the location request to a visitor register of a further network, in which the mobile subscriber is currently registered based on a current location of the mobile subscriber;', 'allocating a visited mobile switching center to the visitor register;', 'determining for optimal routing, if a direct connection is established between the gateway mobile switching center and the visited mobile switching center with respect to charging of the call;', 'checking, upon receipt of the location request message from the home register, feasibility of a setup of the direct connection and providing a test result indicative thereof;', 'sending if the test result is positive indicating that a direct route is establishable, a modified message, additionally containing a flag for a request of a temporary mobile subscriber roaming number, to the visitor register.

2. The method according to claim 1, wherein the message for the request of the location is checked by the visitor register for the flag, and, if the flag is present mobile subscriber roaming number is assigned, which is additionally transmitted to the home register in a message with which the request is acknowledged.

3. The method according to claim 2, wherein the checking of the location request message is carried out by the visitor register only when the mobile subscriber can be reached.

4. The method according to one of claim 1, wherein a message is sent back to the gateway mobile switching center by the home register with which the location request is acknowledged, and wherein at least one item of information is transmitted for identification of the visited mobile switching center.

5. The method according to claim 4, wherein the incoming message is checked by the gateway mobile switching center for the mobile subscriber roaming number, and wherein, if the mobile subscriber roaming number is present, the direct connection to the visited mobile switching center is set up, or, if the mobile subscriber roaming number is not present, a second location request message is sent to the home register.

6. The method according to claim 1, wherein a message is sent back to the gateway mobile switching center by the home register, with which the location request is acknowledged and at least the mobile subscriber roaming number assigned by the visitor register upon request is transmitted.

7. The method according to claim 6, wherein the incoming message is checked by the gateway mobile switching center for the mobile subscriber roaming number, and wherein, if the mobile subscriber roaming number is present, the direct connection to the visited mobile switching center is set up, or, if the mobile subscriber roaming number is not present, a second location request message is sent to the home register.

8. The method according to claim 1, wherein feasibility of the setup of the direct connection is checked by the home register by comparison of country codes that are allocatable to the gateway mobile switching center, the visited mobile switching center and the home register.

9. The method according to claim 8, wherein the country code of the gateway mobile switching center is compared with the country code of the visited mobile switching center, and wherein, given identity of the two country codes, the temporary mobile subscriber roaming number is requested by the home register in the modified message

10. The method according to claim 8, wherein the country code of the home register is compared with the country code of the visited mobile switching center, and wherein, given identity of the two country codes, the temporary mobile subscriber roaming number is requested by the home register in the modified message

11. A system for determining a location of a mobile subscriber registered in a cellular radiotelephone network for an optimal routing of a mobile terminated call directed to the mobile subscriber, comprising:a gateway mobile switching center of a first network, from which, based on a subscriber call number of a called mobile subscriber, a location request message is sent across networks to a home register of a second network in which the mobile subscriber is permanently registered with subscriber data of the mobile subscriber; means in the home register for sending out a location request message to a visitor register of a further network in which the mobile subscriber is currently registered based on a current location of the mobile subscriber; a visited mobile switching center allocated to the visitor register; means for supporting optimal routing, which determines if a direct connection is establishable between the gateway mobile switching center and the visitor mobile switching center with respect to charging of the call; the home register having a system that, upon receipt of the location request message, checks feasibility of a setup of the direct connection, and, if the direct connection is feasible, provides a modified message for sending to the visitor register, the modified message having a flag for the request of a temporary mobile subscriber roaming number.', 'a gateway mobile switching center of a first network, from which, based on a subscriber call number of a called mobile subscriber, a location request message is sent across networks to a home register of a second network in which the mobile subscriber is permanently registered with subscriber data of the mobile subscriber;', 'means in the home register for sending out a location request message to a visitor register of a further network in which the mobile subscriber is currently registered based on a current location of the mobile subscriber;', 'a visited mobile switching center allocated to the visitor register;', 'means for supporting optimal routing, which determines if a direct connection is establishable between the gateway mobile switching center and the visitor mobile switching center with respect to charging of the call;', 'the home register having a system that, upon receipt of the location request message, checks feasibility of a setup of the direct connection, and, if the direct connection is feasible, provides a modified message for sending to the visitor register, the modified message having a flag for the request of a temporary mobile subscriber roaming number

12. A method for determining a location of a mobile subscriber registered in a cellular mobile radiotelephone network for an optimal routing given a mobile terminated call directed to the mobile subscriber, comprising the steps of:sending, based on a subscriber call number of a called mobile subscriber, a message for a location request, across networks, from a gateway mobile switching center of a first network to a home register of a second another network in which the mobile subscriber is permanently registered with subscriber data of the mobile subscriber; sending a message from the home register for the location request to a visitor register of a further network, in which the mobile subscriber is currently registered based on a current location of the mobile subscriber; allocating a visited mobile switching center to the visitor register; determining for optimal routing, if a direct connection is established between the gateway mobile switching center and the visited mobile switching center with respect to charging of the call; checking, upon receipt of the location request message from the home register, feasibility of a setup of the direct connection and providing a test result indicative thereof, the feasibility of the setup of the direct connection being checked by the home register by comparison of country codes that are allocatable to the gateway mobile switching center, the visited mobile switching center and the home register; sending if the test result is positive indicating that a direct route is establishable, a modified message, additionally containing a flag for a request of a temporary mobile subscriber roaming number, to the visitor register.', 'sending, based on a subscriber call number of a called mobile subscriber, a message for a location request, across networks, from a gateway mobile switching center of a first network to a home register of a second another network in which the mobile subscriber is permanently registered with subscriber data of the mobile subscriber;', 'sending a message from the home register for the location request to a visitor register of a further network, in which the mobile subscriber is currently registered based on a current location of the mobile subscriber;', 'allocating a visited mobile switching center to the visitor register;', 'determining for optimal routing, if a direct connection is established between the gateway mobile switching center and the visited mobile switching center with respect to charging of the call;', 'checking, upon receipt of the location request message from the home register, feasibility of a setup of the direct connection and providing a test result indicative thereof, the feasibility of the setup of the direct connection being checked by the home register by comparison of country codes that are allocatable to the gateway mobile switching center, the visited mobile switching center and the home register;', 'sending if the test result is positive indicating that a direct route is establishable, a modified message, additionally containing a flag for a request of a temporary mobile subscriber roaming number, to the visitor register.13. The method according to claim 12, wherein the country code of the gateway mobile switching center is compared with the country code of the visited mobile switching center, and wherein, given identity of the two country codes, the temporary mobile subscriber roaming number is requested by the home register in the modified message.14. The method according to claim 12, wherein the country code of the home register is compared with the country code of the visited mobile switching center, and wherein, given identity of the two country codes, the temporary mobile subscriber roaming number is requested by the home register in the modified message.15. The method according to claim 12, wherein the message for the request of the location is checked by the visitor register for the flag, and, if the flag is present mobile subscriber roaming number is assigned, which is additionally transmitted to the home register in a message with which the request is acknowledged.16. The method according to claim 15, wherein the checking of the location request message is carried out by the visitor register only when the mobile subscriber can be reached.17. The method according to one of claims 12, wherein a message is sent back to the gateway mobile switching center by the home register with which the location request is acknowledged, and wherein at least one item of information is transmitted for identification of the visited mobile switching center.18. The method according to claim 12, wherein a message is sent back to the gateway mobile switching center by the home register, with which the location request is acknowledged and at least the mobile subscriber roaming number assigned by the visitor register upon request is transmitted.19. The method according to claim 18, wherein the incoming message is checked by the gateway mobile switching center for the mobile subscriber roaming number, and wherein, if the mobile subscriber roaming number is present, the direct connection to the visited mobile switching center is set up, or, if the mobile subscriber roaming number is not present, a second location request message is sent to the home register.']

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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)

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