Seokhoon Yoon

Learn More
Deploying a multi-hop underwater acoustic sensor network (UASN) in a large area brings about new challenges in reliable data transmissions and survivability of network due to the limited underwater communication range/bandwidth and the limited energy of underwater sensor nodes. In order to address those challenges and achieve the objectives of maximization(More)
This paper proposes a new intelligent transportation system (ITS) that uses not only integrated cellular and wireless multihop relaying technologies but vehicles’ mobility profiles to provide quality yet affordable services as well. It focuses on a subsystem where cellular bandwidth is mostly used for control signals, and a wireless mesh network called ad(More)
Given a probabilistic graph G representing an intermittently connected network and routing algorithm A, we wish to determine a delivery subgraph G[A] of G with at most k edges, such that the probability Conn<sub>2</sub> (G[A]) that there is a path from source s to destination t (in a graph H chosen randomly from the probability space defined by G[A]) is(More)
Stationary wireless sensor networks (WSNs) fail to scale when the area to be monitored is unbounded and the physical phenomenon to be monitored may migrate through a large region. Deploying mobile sensor networks (MSNs) alleviates this problem, as the self-configuring MSN can relocate to follow the phenomenon of interest. However, a major challenge here is(More)
In this paper, we study mobile element (ME)-based data-gathering schemes in wireless sensor networks. Due to the physical speed limits of mobile elements, the existing data-gathering schemes that use mobile elements can suffer from high data-gathering latency. In order to address this problem, this paper proposes a new hierarchical and cooperative(More)
In this work, we study algorithms for cooperative search and survey using a fleet of Autonomous Underwater Vehicles (AUVs). Due to the limited energy, communication range/bandwidth, and sensing range of the AUVs, underwater search and survey with multiple AUVs brings about several new challenges since a large amount of data needs to be collected by each(More)
Routing in Intermittently Connected Networks (ICN) is a challenging problem due to the uncertainty and time varying nature of network connectivity. In this work, we focus on a special class of ICN formed by mobile ad hoc users called ICMAN. We first consider a new and practical probabilistic mobility model where the nodes move between a set of “hubs” in a(More)
In a practical deployment, mobile sensor network (MSN) suffers from a low performance due to high node mobility, time-varying wireless channel properties, and obstacles between communicating nodes. In order to tackle the problem of low network performance and provide a desired end-to-end data transfer quality, in this paper we propose a novel ad hoc routing(More)
In this study, a concatenated coding scheme based on Reed–Muller (RM) codes and bit-extension codes is proposed for equivocation of a wiretap channel. RM codes and their cosets are adopted for message encoding, and bit-extension codes are used to enhance the equivocation capability for a wiretapper’s channel. The average equivocation is discussed when only(More)