Christian Makaya

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Mobility management with provision of seamless handover is crucial for an efficient support of global roaming of mobile nodes (MNs) in next-generation wireless networks (NGWN). Mobile IPv6 (MIPv6) and its extensions were proposed by IETF for IP layer mobility management. However, performance of IPv6-based mobility management schemes is highly dependent on(More)
Recent technological innovations allow mobile devices to be equipped with multiple wireless interfaces. Moreover, the trend in fourth-generation or next-generation wireless networks (4G/NGWNs) is the coexistence of diverse but complementary architectures and wireless access technologies. In this context, an appropriate mobility management scheme, as well as(More)
With the increasing demand for quality of service (QoS) by end-users, mobility management, IP flow mobility and data offload are key features needed in next-generation wireless networks. With the wide deployment of WiFi (e.g., home, vehicle, smartphones, laptops) and onboard unit (OBU) in automotive and public transportation systems (PTS), it is important(More)
The major trend in next-generation or 4G wireless networks (NGWN/4G) is the coexistence of diverse but complementary architectures and wireless access technologies. In this context, an appropriate integration and interworking of existing wireless networks are crucial to allow seamless roaming across those networks. Several integrated architectures have been(More)
Softwarization of network functions running on commodity servers, switches, and storage by leveraging standard IT virtualization and cloud technologies has become a goal of communications service providers (CSPs). Management and orchestration (MANO) is crucial for achieving this network functions virtualization (NFV) vision. We propose an open platform for(More)
Proxy Mobile IPv6 (PMIPv6) has been developed by the IETF as a network-based mobility management protocol to support the mobility of IP devices. Although several proposals have been made for localized routing optimization, they don't take into account handover management and localized routing simultaneously. In fact, the localized routing state is only(More)
While there have been tremendous efforts to develop the architecture and protocols to support advanced Internet-based services over 3G and 4G networks, IMS is far from being deployed in a wide scale manner. Effort to create an operator controlled signaling infrastructure using IP-based protocols has resulted in a large number of functional components and(More)