Method and devices for dialling services

• US 20010009854A1
• Filed: 11/29/2000
• Published: 07/26/2001
• Est. Priority Date: 11/30/1999
• Status: Active Grant

• Current Assignee: Optis Wireless Technology, LLC (Brevet Capital)
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Kaibel, Martin, Keutmann, Heinz-Peter, Kobriger, Peter
• Granted Patent: US 6,757,539 B2
• Time in Patent Office: Days
• US Class Current: 455/445
• CPC Class Codes: H04W 4/90 Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
• CPC Class Codes: H04W 76/50 for emergency connections

Abstract

The invention relates to a method and devices for dialling services in a mobile telecommunication network. A set of stored character strings used for comparison with character strings entered by a subscriber to call a service is modified, if a mobile user equipment switches from or to a visited telecommunication network.

In case that an entered character string matches a stored one, it is translated into a service identifier. This enables a subscriber to use character strings defined in a visited network for dialling services.

Claims

1. Method for dialling a service in a mobile telecommunication network, comprising the following steps:

entering a desired call into a mobile user equipment,

mapping the desired call into a service identifier in the mobile user equipment,

transmitting the service identifier from the mobile user equipment to a node of the telecommunication network,

mapping the service identifier into a dialling number in the node of the telecommunication network,

setting up a call to the service allocated to the dialling number,

detecting that the mobile user equipment has switched to a visited telecommunication network, and

increasing the set of character strings stored in the mobile user equipment by the character strings that are used in the visited telecommunication network for dialling services.

2. Method according to

claim 1

, with the additional steps of

detecting that the mobile user equipment switched from the visited telecommunication network, and

reducing the set of character strings stored in the mobile user equipment by the character strings that are used in the left visited telecommunication network for dialling services.

3. Method according to

claim 1

or

2

, wherein the input of the desired call is done by entering a character string into the mobile user equipment, and wherein a comparison of the entered character string with pre-defined character strings is performed, and if the entered character string corresponds to a pre-defined character string the desired call is mapped into the service identifier and the service identifier allocated to said character string is determined.

4. Method according to one of

claims 1

to

3

, wherein pre-defined character strings are stored on a subscriber identification card.

5. Method according to one of

claims 1

to

4

, wherein the node of the telecommunication network is a control node of a core network of the telecommunication network.

6. Method according to one of

claims 1

to

5

, wherein an identification of the calling subscriber is transmitted and wherein a preferred language for the dialled service is determined by means of the identification of the calling subscriber.

7. Method according to one of

claims 1

to

6

, wherein a language indicator is additionally transmitted from the mobile user equipment to the node and a preferred language is determined for the dialled service by means of the language indicator.

8. Method according to one of

claims 1

to

7

, wherein the dialled service is an emergency call service.

15. Use of the method according to

claim 1

, wherein the mobile telecommunication network is a GSM (Global System for Mobile Communication) network.

16. Use of the method according to

claim 1

, wherein the mobile telecommunication network is a UMTS (Universal Mobile Telecommunication System) network.

17. Computer program stored on a computer-readable medium realising a method according to one of

claims 1

to

8

.

9. Mobile user equipment comprising

a unit for entering a desired call,

a memory for storing a service identifier,

a processing unit for mapping the desired call into a service identifier allocated to the desired call,

a sending unit for sending the allocated service identifier,

a storage for storing character strings used for dialling services, and

a means for increasing the set of character strings stored in said storage by character strings used in a visited telecommunication network for dialling services.

10. Mobile user equipment according to

claim 9

, comprising means for reducing a stored set of character strings by character strings used in a visited telecommunication network for dialling services, if the mobile user equipment leaves the visited telecommunication network.

11. Mobile user equipment according to

claim 9

or

10

, wherein character strings are allocated to service identifiers.

12. Node for a telecommunication network, comprising

a receiving unit for receiving a service identifier,

a memory for storing a dialling number,

a processing unit for mapping the service identifier into a dialling number allocated to the service identifier,

means for setting up a call to the service allocated to the dialling number, and

means for updating a set of character strings used for dialling services stored in a mobile user equipment.

13. Node according to

claim 12

, comprising

means for recognising a language indicator, and

means for allocating dialling numbers to the language indicator.

14. Node according to

claim 12

, comprising

means for determining a country code of a home telecommunication network of a , and

means for allocating dialling numbers to a country code.