Abstract: The invention describes a methods of enabling and performing location-based services especially geomessaging. The invention describes in detail a flexible combination of multicast Internet protocol addresses and area codes in order to generate geomessaging Internet protocol addresses. The geomessaging Internet protocol address enables to receive by means of a mobile communication device (300) according to the invention geomessages and to submit the geomessages by means of the geomessaging network entity (400) according to the invention. No signaling between the mobile communication device (300) and the network or any service provider within the network is necessary to specify the current location of the mobile communication device. Furthermore, there is no need for a geomessaging message provider to know which mobile communication device is currently located within a specific first area.

Abstract: The invention describes a methods of enabling and performing location-based services especially geomessaging. The invention describes in detail a flexible combination of multicast Internet protocol addresses and area codes in order to generate geomessaging Internet protocol addresses. The geomessaging Internet protocol address enables to receive by means of a mobile communication device (300) according to the invention geomessages and to submit the geomessages by means of the geomessaging network entity (400) according to the invention. No signaling between the mobile communication device (300) and the network or any service provider within the network is necessary to specify the current location of the mobile communication device. Furthermore, there is no need for a geomessaging message provider to know which mobile communication device is currently located within a specific first area.

Abstract: A method for the switchover of a mobile terminal device from a first radio network of a mobile radio system to a second radio network is described. The switchover is carried out on the basis of a CS fallback mechanism, and whereby, on the basis of the switchover, the mobile terminal device logs on to a base station of the second radio network in order to establish a connection. In conjunction with the log-on, the mobile terminal device transmits a notification pertaining to the CS fallback mechanism to the base station, and the base station registers the log-on of the terminal device as a function of the notification. Moreover, a base station and to a mobile terminal device for carrying out the method are also described herein.

Abstract: There is provided a method for a mobile communication device registering in second radio cell of a mobile communication network based on a deactivation of a first radio cell in which the mobile communication device was located. An exemplary method comprises determining a random time interval by the mobile communication device. An expiration of the random time interval is determined starting from a predetermined point in time. The exemplary method also comprises registering in the second radio cell, when the expiration of the random time interval has been determined.

Abstract: The subject innovation relates to a method and system for selecting a core network to serve a mobile communication device. An exemplary method comprises receiving in the mobile communication device a first identifier from a shared radio access network being connected to multiple core networks. The exemplary method also comprises reading second identifiers of the multiple core networks from a data item stored in the mobile communication device upon receipt of the first identifier. The data item may comprise an allocation between the first identifier and the second identifiers. The exemplary method additionally comprises selecting the core network from a group of available core networks, the group being determined based upon the second identifiers.