Nokia Corporation

Nokia Networks Oy

Teemu Mäkinen

Heikki Juhani Einola

Rune Lindholm

Tony Hulkkonen

Juha Bäck

Hannu-Pekka Salin

Kalle Tammi

Harri Halminen

Matti Vilppula

Juha T Timonen

Kari Virtanen

Keijo Ekola

Jouni Smolander

Vesa Tervo

Giorgi Gulbani

Ulf Sandas

The present invention relates to a method and an apparatus for performing a location update of a user equipment in a mobile network, wherein it is decided on the basis of the result of a negotiation with an old location register whether to use an identification information obtained from the old location register or to retrieve the identification information from a user database. Accordingly, whenever a fall-back to a protocol version not supporting the required identification information is determined, the identification information is retrieved from the user database, to thereby guarantee that the correct identification information is used in the new location register. The identification information may comprise security or authentication parameters.

Method and apparatus for electing an identification confirmation information

A method of arranging data protection in a telecommunication system including a first mobile communication network, a second mobile communication network, and a mobile station supporting both of the mobile communication networks is disclosed. The method includes ciphering traffic between the mobile station and the first mobile communication network using a first cipher key; calculating a second cipher key to be used for ciphering traffic between the mobile station and the second mobile communication network in the first mobile communication network when the mobile station operates in the first mobile communication network; transmitting information necessary for calculating the second cipher key from the first mobile communication network to the mobile station when the mobile station operates in the first mobile communication network; and calculating the second cipher key at the mobile station to be used for ciphering traffic between the mobile station and the second mobile communication network.

Arranging authentication and ciphering in mobile communication system

The present invention relates to a method, a communications system and a network element for providing communication services for a mobile station. The mobile station is arranged to use at least two different communication services provides by the communications system. The communications system comprises a first network element and a second network element for controlling the communication services provided for the mobile station. The mobile station may communicate by using at least two different communication services under the control of the first network element. The method comprises initiating relocation of the control of a least one of said communication services from the first network element to the second network element, whereafter a message is sent to the first network element. The message includes information based on which it is possible to selectively relocate said at least one communication service to the second network element. Said at least one communication service is then selectively relocated from the first network element to the second network element based on the information.

Relocation of communication services

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Järvenpää, Finland

Teemu Mäkinen