Telefonaktiebolaget Lm Ericsson (Publ)

Mathias Cramby

Thomas Walldeen

Stefan Parkvall

Gunnar Mildh

Magnus Hallenstål

Göran Rune

Per Johan Beming

Johan Philip Magnusson

Göran Malmgren

Karl-Erik Sunnell

The present invention relates to methods and arrangements in mobile radio telecommunications for enabling access to Circuit Switched (CS) services for a user equipment (UE) that is connected to a LTE/SAE (Long Term Evolution/System Architecture Evolution) network. The UE's current position is stored in a LTE position format in the LTE network or in the SAE network. The invention provides steps and means for transforming the UE's position in LTE format to position information in CS format for the UE, steps and means for registering the UE in the CS network using said transformed position information, and steps and means for establishing access to CS services provided by said CS network.

Method and arrangements for circuit switched services in communication networks

A method and an arrangement for avoiding unnecessary retransmissions in a packet-based radio-communication network by exchanging transmission state information between retransmission functionality entities () located at respective protocol layers in different network nodes (), and performing inter-layer coordination of retransmissions between the network nodes () based on the exchanged transmission state information to provide a more efficient overall scheme for retransmissions.

Method and an arrangement for avoiding unnecessary retransmissions

The present invention refers to methods and systems for enabling paging and DRX in a hybrid cellular communication system comprising a core network (CN) and radio access network (RAN) employing different paging techniques. The core network is associated with a DRX parameter of a CN associated parameter set, which according to the invention, is mapped to a value of a RAN associated parameter set. This resulting value may then be used by the radio access network and/or a mobile station for determining a present paging period of the mobile station. Furthermore, methods of selecting DRX parameters for a mobile station in different operational modes are provided. The invention is particular applicable to a communication system including a GERAN radio access network operating in Iu mode.

Paging incommunication systems

Growing community of inventors

Sollentuna, Sweden

Mathias Cramby