Seunghyun Yoon

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As the Internet evolves quickly from a best-effort network to a critical communications infrastructure that requires a higher level of controllability and guarantee of service quality, and the delivery of such communications services becomes even more competitive, large-scale NSPs or ISPs have to focus more on the performance and efficient resource(More)
End-to-End (E2E) flow monitoring is useful for observing performance of networks such as throughput, loss rate, and jitter. Typically, E2E flow monitoring is carried out at end hosts with known tools such as iperf. However, in a large-scale network, the end-host approach for performance measurement may not be easily deployed because of expensive costs and(More)
In times of disaster acquiring aerial images is challenging. Runways may be crippled thus denying conventional aircraft in the area from taking off. Also the time required to schedule a satellite fly-by may delay first response efforts. Man backpackable aerial robots can be carried close to the disaster site and flown to capture aerial images. This paper(More)
A new heterodyne interferometer scheme which has open accesses to both the geometrically balanced probe beam (PB) and reference beam (RB) paths, for which, depending on the nature of a specific sensing mechanism, a transmission geometry or a reflection geometry can be employed, is presented. We will show that, because of a small separation between the short(More)
The Path Computation Element (PCE) Working Group (WG) at the Internet Engineering Task Force (IETF) is chartered to specify a PCE-based architecture for the path computation of inter-domain MPLS/GMPLS-based traffic engineered Label Switched Paths (LSPs). The PCE architecture introduces a special computational entity that will corporate with similar entities(More)
In this paper, we present the design and the implementation of OSPF-TE routing information collector for MPLS and GMPLS networks. OSPF is commonly used as an IGP in MPLS and GMPLS networks to determine the topology over which LSPs can be established. TE extensions have been recently enabled in OSPF to support SPF tree calculation upon different purposes,(More)
As the Internet is quickly evolving from best-effort networks to a very critical communications infrastructure that requires higher quality Internet services and the delivery of such communications services become competitive, large-scale NSPs or ISPs have to concern much more on the performance and efficient resource usages of their networks. This(More)
The development of Information-Centric Networking (ICN) concepts is one of the significant results of different international Future Internet research activities. In the approaches, the networking paradigm shifts from the host-to-host communication to the information-based communication. The ICN concept is receiving huge attention because of the increasing(More)
In this paper, we consider a federated cloud computing effect. Cloud computing provides software, platform, and infrastructure as services. Customers pay for the services in a pay-as-you-go model. As an effort of quantifying the effect of cloud computing, this paper evaluates a federated cloud computing network. For the evaluation we studied the simple(More)
With the advent of cloud and virtualization technologies and the integration of various computer communication technologies, today’s computing environments can provide virtualized high quality services. The network traffic has also continuously increased with remarkable growth. Software defined networking/network function virtualization (SDN/NFV) enhancing(More)