A network-based coordination design for seamless handover between heterogeneous wireless networks

Includes bibliographical references (leaves 136-144).The rapid growth of mobile and wireless communication over the last few years has spawned many different wireless networks. These heterogeneous wireless networks are envisioned to interwork over an IP-based infrastructure to realize ubiquitous network service provisioning for mobile users. Moreover, the availability of multiple-interface mobile nodes (MNs) will make it possible to communicate through any of these wireless access networks. This wireless network heterogeneity combined with the availability of multiple-interface MNs creates an environment where handovers between the different wireless access technologies become topical during mobility events. Therefore, operators with multiple interworking heterogeneous wireless networks will need to facilitate seamless vertical handovers among their multiple systems. Seamless vertical handovers ensure ubiquitous continuity to active connections hence satisfy the quality of experience of the mobile users

Enhancing PMIPv6 for Better Handover Performance among Heterogeneous Wireless Networks in a Micromobility Domain

This paper analyzes the reduction of handover delay in a network-based localized mobility management framework assisted by IEEE 802.21 MIH services. It compares the handover signaling procedures with host-based localized MIPv6 (HMIPv6), with network-based localized MIPv6 (PMIPv6), and with PMIPv6 assisted by IEEE 802.21 to show how much handover delay reduction can be achieved. Furthermore, the paper proposes and gives an in-depth analysis of PMIPv6 optimized with a handover coordinator (HC), which is a network-based entity, to further improve handover performance in terms of handover delay and packet loss while maintaining minimal signaling overhead in the air interface among converged heterogeneous wireless networks. Simulation and analytical results show that indeed handover delay and packet loss are reduced

IEEE802.21 Optimized handover delay for proxy Mobile IPV6

Next generation wireless networks are envisaged to be a combination of different but complementary access tech-nologies. Interworking of these heterogeneous wireless networks will provide ubiquitous access to roaming net-work users. Thus, a seamless mobility mechanism with low handover delay to maintain active communication flows during handover across these networks is required. Sev-eral solutions, mainly host-based localized mobility man-agement schemes, have been widely proposed to reduce handover delay in heterogeneous wireless networks. How-ever, the handover delay remains high and unacceptable for delay-sensitive services. Moreover, host-based mobility management schemes involve the mobile node in mobility-related signaling hence effectively increasing the handover delay. This paper analyzes the reduction of handover delay in a network-based localized mobility management frame-work assisted by IEEE 802.21 Media Independent Hand-over services. It compares the handover signaling proce-dures with host-based localized Mobile IPv6 (HMIPv6), with network-based Mobile IPv6 (PMIPv6), and with PMIPv6 assisted by IEEE 802.21 to show how much handover delay reduction can be achieved. I

Network-based distributed mobility management for network mobility

Network Mobility (NEMO) Basic Support Protocol (NBSP) provides mobility supports for mobile networks. NBSP is an extension of Mobile IPv6 which employs a centralized mobility management approach. It relies on a static and centralized home agent for signaling management and data forwarding. All data traffic traverse a centralized home agent, which leads to suboptimal routing, high packet overhead and latency, especially in nested NEMO (i.e. when the mobile networks connect to one another to reach the infrastructure). In this paper, we develop a network-based distributed mobility management (DMM) scheme for non-nested and nested NEMO scenarios, with the goal of mitigating the aforementioned problems. Additionally, the proposed scheme improves the packet delivery and location update (i.e., binding update) costs. The paper discusses in detail the scheme's design, operation mechanism and the performance evaluation analysis. The numerical results of the proposed scheme show significant improvement in packet overhead and latency as well as binding update and packet delivery costs. © 2014 IEEE