METHOD TO PROVIDE MOBILITY BETWEEN 3GPP SYSTEM ARCHITECTURE EVOLUTION/LONG TERM EVOLUTION (SAE/LTE) AND OTHER ACCESS SYSTEMS USING THE IEEE 802.21 MEDIA INDEPENDENT HANDOVER FUNCTION

摘要

This invention relates to Mobility and Handover between heterogeneous wireless networks. More specifically, this invention provides a method to support handover between the 3GPP System Architecture Evolution/Long Term Evolution (SAE/LTE) and other access systems like the Universal Mobile Telecommunication System (UMTS), CDMA2000, Inter-working Wireless Local Area Networks (IWLAN) and the WiMAX access systems. The scope of the invention also covers the case when the UE is not capable of accessing both the SAE/LTE and other access systems simultaneously. This invention provides a system and method to perform Mobility between the access systems with optimized authentication procedure using security context transfer between the access systems, backward handover, i.e. reserving resources in the target access system before the handover and also minimize the data loss by buffering the data during the handover. More particularly this invention relates to method to provide mobility between 3gpp system architecture evolution/long term evolution (SAE/LTE) and other access systems using the IEEE 802.21 media independent handover function