Abstract: A method, system and network element for tracing signaling messages related to a subscriber in a mobile communication system. In the solution according to the invention a functional entity of the mobile communication system receives a trace command which indicates the tracer and identifies at least one subscriber whose signaling messages are to be traced, and tracing is started, tracing comprising the steps of: copying the signaling message in response to reception or transmission of a signaling message related to the subscriber to be traced, and sending a copy to the tracer.

Abstract: Authentication of a user of a communication system comprising a session control server and an authentication server, wherein the communication system supports at least two separate authentication schemes, comprising the steps of determining, at the session control server, that a registration request from the user to be authenticated leaves undefined the authentication scheme to be used for authenticating the user; and inquiring, from the authentication server, which authentication scheme is to be used for authenticating the user, said inquiring being based on an identity of the user and pre-stored information at the authentication server on a mapping between user identities and usable authentication schemes.

Abstract: A distributed database system returns a token which an application may use in consecutive requests to the distributed database system to by-pass a fragmentation layer or distribution functionality of the distributed database system.

Abstract: The invention relates to a method and an arrangement against fraudulent use in a telecommunications network. The invention is based on the idea that at least one fraud profile identified by an identifier is created and the identifier is included in the subscriber data of some subscribers. Based on this identifier the fraud restriction parameters of the subscriber are retrieved from the subscriber's fraud profile, and these fraud restriction parameters are used in detecting and indicating possible fraudulent use. The fraud restriction parameters include values for different service limits, such as the maximum number of call forwarding re-quests and/or the maximum number of location updates during a certain period, and possibly at least for some features an action parameter related to a service limit and implemented when the service limit is reached.

Abstract: According to the present invention, a message is sent from a first network element in a mobile communication network to a second network element in several segments, using an application produced. To the last segment of the message a parameter is added, which indicates the number of segments of the message. At the second network element, received message segments are counted, and the number of counted message segments is compared with the number indicated by the parameter. If a mismatch of the numbers is detected, the message is discarded at the second network element.

Abstract: When an SCCP protocol according to the SS7 signalling system is used in the network layer and some other protocol than a protocol according to the SS7 signalling system is used in the lower layer, an address according to the second system is set as a proper address in the address field of the addressing according to the SCCP protocol, the address is marked as a global title address of the SCCP protocol, and the proper address is transmitted from the first layer to the second layer. In this way the lower layer receives an address it can use for routing and there is no need to change the addressing of the SCCP protocol.

Abstract: The invention relates to a method and an arrangement against fraudulent use in a telecommunications network. The invention is based on the idea that at least one fraud profile identified by an identifier is created and the identifier is included in the subscriber data of some subscribers. Based on this identifier the fraud restriction parameters of the subscriber are retrieved from the subscriber's fraud profile, and these fraud restriction parameters are used in detecting and indicating possible fraudulent use. The fraud restriction parameters include values for different service limits, such as the maximum number of call forwarding re-quests and/or the maximum number of location updates during a certain period, and possibly at least for some features an action parameter related to a service limit and implemented when the service limit is reached.