MPLS Based Mobility Framework in 4G Architectures

In this paper, an integration framework for 4Gnetwork architecture between UMTS-GPRS system and 802.11 WLAN systems using MPLS as the underlying technology is developed. In 4G networks, to suffice the needs of users with relatively low mobility but yet to provide a substantial amount of bandwidth in hot-spots, it becomes essential to integrate WLAN 802.11 systems with currently existing UMTS-GPRS systems. The integrated network can handle wider mobility of the mobile nodes (MN). Multiprotocol Level Switching (MPLS), a technology has in built features pivoting on QoS provides better efficiency in the integrated networks. In this paper it is shown that when MPLS is used to bridge the UMTS and 802.11 architectures, reduces location update of the MN with the core network (CN). This is achieved by switching the parameters governing Forwad Equivalence Class (FEC) generation and redirection in such MPLS enabled architecture. An efficient mobility management scheme is discussed when MN moves from one domain to other. Simulation results for handoff delays and location update of an MN in the integrated architecture with MPLS show the better performance of the proposed MPLS based framework.