Patent ID: 6807419
Filing Date: 2004-10-19
Classification: H04W

Abstract:
A method of performing a Serving Radio Network Subsystem (â€œSRNSâ€ ) Relocation for a given User Equipment (â€œUEâ€ ) in a Universal Mobile Telecommunications System (â€œUMTSâ€ ) network between a UMTS radio network and a UMTS core network, in which the UMTS radio network and the UMTS core network are logically separated, the method comprising the steps of:sending a Relocation Required message from the serving Radio Network Controller (â€œRNCâ€ ) to the core network; and sending a Relocation Request message from the core network to the Target RNC; wherein the Relocation Required message contains a Radio Resource Control (â€œRRCâ€ ) Initialization Information container which is incorporated transparently by the core network into the Relocation Request message and the RRC Initialization Information container in turn contains information enabling a mapping to be made between Radio Access Bearers (â€œRABsâ€ ) and Radio Bearers (â€œRBsâ€ ) for the UE wherein the RRC Initialization Information container contains a Radio Bearer Information element, the mapping comprises a RAB identity corresponding to each RB, the RABs and the RBs being identified by RAB and RB identifiers, respectively.