Abstract: The present invention relates to a paging method and system for a radio access network which provides access to a core network, said system comprising a central network controlling device (100) for receiving pagings and for distributing said pagings to other network controlling devices (5) based on a paging information provided to said central network controlling device. Accordingly, while the access network comprises many RNCs and/or RNASs, the information required for paging or mobility management is provided at one place in one location or routing area. Thus, when the core network sends a paging request, the request does not have to be transmitted to many RNCs and/or RNASs and extra paging can be avoided in the access networks. Moreover, a paging coordination is possible despite of the number of different core networks.

Abstract: A method, system and interworking unit for implementing a combined signalling link for CS and PS side signalling in lu′ interface. The invention provides an interworking unit between a base station and core network so as to facilitate the signalling of control planes to decrease excess signalling. The invention implements a combined signalling link for both lu′-CS Control Plane and lu′-PS Control plane signalling. In this context the distributed radio access network is based on IP (Internet Protocol).

Abstract: The present invention relates to a paging method and system for a radio access network which provides access to a core network, said system comprising a central network controlling device (100) for receiving pagings and for distributing said pagings to other network controlling devices (5) based on a paging information provided to said central network controlling device. Accordingly, while the access network comprises many RNCs and/or RNASs, the information required for paging or mobility management is provided at one place in one location or routing area. Thus, when the core network sends a paging request, the request does not have to be transmitted to many RNCs and/or RNASs and extra paging can be avoided in the access networks. Moreover, a paging coordination is possible despite of the number of different core networks.

Abstract: A support node (SGSN) in a packet radio network, the node being adapted to support mobile station location updates and data transmission to and/or from a mobile subscriber. A first address (IP1) has been appointed for the support node and it corresponds to the area served by the support node in the packet radio network. In addition, a second address (IP2) has been appointed to the support node (SGSN) and it belongs to the same address system as said first address (IP1). The second address (IP2) is used substantially for data transmission and . the first address (IP1) is used substantially for signaling outside data transmission. The area served by the support node is preferably divided into subareas, to each of which a second address (IP2) is appointed, and a mobile subscriber location update is informed to the home location register (HLR) only when the support node (SGSN) serving the mobile subscriber changes, but not when the subarea changes.