NON-3GPP ACCESS TO 3GPP ACCESS INTER-RADIO ACCESS TECHNOLOGY HANDOVER WITH RESOURCE PREPARATION

摘要

FIELD: radio engineering, communication.;SUBSTANCE: during a pre-registration phase (800), a forward attachment function (260) receives a pre-attach request message (833) and creates (860) a mobility management context for the UE (210) that is valid for E-UTRAN access. During a resource preparation phase (900), the mobility management context is transferred to a mobility management entity (MME) (240) and radio and transport resources are reserved for the UE (210) at the target E-UTRAN cell (230). When handover is initiated (910) by either the UE or the non-3GPP network, the time-consuming authentication and authorisation procedures that are performed during the process of pre- registration can be skipped. Additionally, radio and transport resources have already been assigned to the UE and thus do not have to be set up when the handover is executed.;EFFECT: pre-registration phase and resource preparation phase reduce latency when user equipment hands over from a non-3GPP radio access such as WiMAX to an 3GPP radio access network such as E-UTRAN.;20 cl, 10 dwg