METHODS INVOLVING A CORE NETWORK NODE THAT IS HANDLING A MOBILE SUBSCRIBER AND INITIATES A REQUEST TO A SECOND CORE NETWORK NODE TO HANDLE SAID MOBILE SUBSCRIBER

摘要

A method is described for handling a mobile station in a mobile telecommunication network where a Radio Access Network (RAN) node is connected to several Core network (CN) nodes. The method proposes that a core network node can send, i.e. initiate, a request of handling a mobile subscriber to another core network node in a mobile telephony network. The decision to request the handover is done in the CN node, and this decision is not done due to the MS or a RAN node determining that a handover is required (which is the normal case). For example, a CN node receiving an initial request (e.g. Attach Request) from a Mobile Subscriber (MS) will, after discovering that it should not or could not handle the request (e.g. due to the user having a subscription by another operator), forward a request to another CN node, one of the correct PLMN. This CN node will then handle the request from the MS.