NAS node selector function
The purpose of the present document provides the current status of the work "Intra Domain Connection of RAN Nodes to Multiple CN Nodes: Overall System Architecture" within 3GPP TSG RAN WG3.
Currently an RNC can only be connected to one MSC and/or one SGSN. This can bring about inefficient usage of hardware and disproportionate spread of signalling loads across a network.
This Work Item concentrates primarily on a solution where a (standardised) routing function in the RNC enables the connection of multiple MSCs/SGSNs to an RNC. It is hoped that this will bring about a reduction in mobility management signalling and improved efficiency in hardware utilisation.
It describes agreed requirements related to the Work Task, and split the Work Task into "Study Areas" in order to group contributions in a consistent way. It discusses the impact upon RAN3 specifications, and identifies the affected specifications. If information needs to be communicated to groups outside of TSG RAN WG3, it is recorded in this document. When solutions are sufficiently stable, the CRs to the various impacted RAN3 specifications can be issued.
It also describes the schedule of the Work Task.
The present document is a 'living' document, i.e. it is continuously updated and presented to all TSG-RAN meetings.