Existing home-networking protocols do not robustly incorporate universal connectivity among multiple homes, which leaves their use restricted to a single home. In addition, even in a single home network, new functional requirements ask for more diversified forms of networking control. This paper presents in-home consumer electronic devices that incorporate the emerging SDN (Software Defined Networking) paradigm. The proposed devices enable ondemand provisioning for protocol-agnostic home networking and thus provide a high degree of flexibility for intra-home networking as well as wider connectivity for inter-home networking. The feasibility of the prototype devices is verified by realizing a multi-home visual-sharing scenario and by supporting diverse future scenarios 1 .

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In this paper, to manage the efficient control of IP packet flows crossing multi-provider networks such as Internet, we propose a SDN(Software Defined Networking)-based policy controller. The proposed policy controller leverages the visibility of underlying network and manages both virtual links and ports to inter-connect networking elements. The controller is capable of quickly composing multiple on-demand virtual networks and dynamically managing the composed networks, thus it can provide more flexible and optimized overlay networking environment to end-user applications. More specifically, we first look into the proposed structure and features of policy controller. With two kinds of service applications, we then verify the applicability of the proposed controller by evaluating its service composition time.

Recent growth in available network bandwidth envisions widespread use of broadband applications such as uncompressed Internet HDTV, a cutting-edge application technology for networked collaboration. In this paper, we introduce a costeffective uncompressed HD visual sharing system and discuss its software architecture in depth. We also illustrate our experiences with the visual sharing system for interactive collaboration. Finally, experimental results will show how well it compensates for packet jitter to gear up media synchronization. KeywordsUncompressed high definition video, immersive media, interactive conferencing, tele-presence, and network-based collaboration.

In this paper, we introduce an SDN-based intrusion prevention system for more secure Science DMZ with no performance limits. The proposed system is structured with intrusion-prevention, intrusion-detection, and prevention-decision subsystems which are physically distributed but informationally connected by an SDN interface. The functional distribution and the application of SDN technology increase the flexibility and extensibility of the proposed system and prevent performance degradation possibly caused by network security equipments on Science DMZ. We verified the feasibility and performance of the proposed system over a testbed set up at KREONET. . 특히 근래에는 DMZ 내‧외부 네트워킹 자원을 유연하게 연동하기 위해