Network-based IP flow mobility support in 3GPPs evolved packet core

Includes bibliographical references.Mobile data traffic in cellular networks has increased tremendously in the last few years. Due to the costs associated with licensed spectrum, Mobile Network Operators (MNOs) are battling to manage these increased traffic growths. Offloading mobile data traffic to alternative low cost access networks like Wi-Fi has been proposed as a candidate solution to enable MNOs to alleviate congestion from the cellular networks. This dissertation investigates an offloading technique called IP flow mobility within the 3rd Generation Partnership Project (3GPP) all-IP mobile core network, the Evolved Packet Core (EPC). IP flow mobility would enable offloading a subset of the mobile user‟s traffic to an alternative access network while allowing the rest of the end-user‟s traffic to be kept in the cellular access; this way, traffic with stringent quality of service requirements like Voice over Internet Protocol (VoIP) would not experience service disruption or interruption when offloaded. This technique is different from previous offloading techniques where all the end-user‟s traffic is offloaded. IP flow mobility functionality can be realised with either host- or network-based mobility protocols. The recommended IP flow mobility standard of 3GPP is based on the host-based mobility solution, Dual-Stack Mobile IPv6. However, host-based mobility solutions have drawbacks like long handover latencies and produce signaling overhead in the radio access networks, which could be less appealing to MNOs. Network-based mobility solutions, compared to the host-based mobility solutions, have reduced handover latencies with no signaling overhead occurring in the radio access network. Proxy Mobile IPv6 is a networkbased mobility protocol adapted by 3GPP for mobility in the EPC. However, the standardisation of the Proxy Mobile IPv6-based IP flow mobility functionality is still ongoing within 3GPP. A review of related literature and standardisation efforts reveals shortcomings with the Proxy Mobile IPv6 mobility protocol in supporting IP flow mobility. Proxy Mobile IPv6 does not have a mechanism that would ensure session continuity during IP flow handoffs or a mechanism enabling controlling of the forwarding path of a particular IP flow i.e., specifying the access network for the IP flow. The latter mechanism is referred to as IP flow information management and flow-based routing. These mechanisms represent the basis for enabling the IP flow mobility functionality. To address the shortcomings of Proxy Mobile IPv6, this dissertation proposes vi enhancements to the protocol procedures to enable the two mechanisms for IP flow mobility functionality. The proposed enhancements for the session continuity mechanism draw on work in related literature and the proposed enhancements for the IP flow information management and flow-based routing mechanism are based on the concepts used in the Dual- Stack Mobile IPv6 IP flow mobility functionality. Together the two mechanisms allow the end-user to issue requests on what access network a particular IP flow should be routed, and ensure that the IP flows are moved to the particular access network without session discontinuity

User-centric Mobility Management Architecture For Vehicular Networks

Vehicular Ad Hoc Network (VANET) is a subclass of Mobile Ad Hoc Networks that provides wireless communication among vehicles as well as between vehicles and roadside devices. Providing safety and user comfort for drivers and passengers is a promising goal of these networks. Some user applications need a connection to internet through gateways which are in the road side. This connection could generate an overhead of control messages and also the handover time among gateways can affect the performance of these applications. This paper proposes an architecture for intra- and inter-system management for virtual environments in vehicular networks, supporting user-driven applications. More specifically, we consider applications that depend on virtual environments which must be constantly updated, such as online gaming. To efficiently support these applications, the proposed architecture includes an extension of the 802.21 protocol to cope with the virtual environment updates. NS3 simulations were performed to evaluate the proposal over the proxy MIPv6 considering VANET and LTE networks as base stations. We observed that the proposed mechanism that extends the 802.21 protocol had a shorter handover time and lower packet loss when acting with the presented architecture.584256Technische Universitat Hamburg-Harburg,IEEE Communications Society Germany ChapterKaragiannis, G., Altintas, O., Ekici, E., Heijenk, G., Jarupan, B., Lin, K., Weil, T., Vehicular networking: A survey and tutorial on requirements, architectures, challenges, standards and solutions (2011) IEEE Communications Surveys Tutorials, 13 (4), pp. 584-616Asgari, M., Jumari, K., Ismail, M., (2011) Analysis of Routing Protocols In Vehicular Ad Hoc Network Applications, 181, pp. 384-397. , In: Zain, J.M., Wan Mohd, W.M.B., El-Qawasmeh, E. (eds.) ICSECS 2011, Part III. 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