Han-You Jeong

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With the emergence of diverse group-based services, multiple multicast groups are likely to coexist in a single network, and users may subscribe to multiple groups simultaneously. However, the existing group key management (GKM) schemes, aiming to secure communication within a single group, are not suitable in multiple multicast group environments because(More)
In this paper, we investigate the core-switch mapping (CSM) problem that optimally maps cores onto an NoC architecture such that either the energy consumption or the congestion is minimized. We propose a many-to-many core-switch mapping (mCSM) that allows a switch (core) to have multiple connections to its adjacent cores (switches). We also present(More)
AbstmctIn this paper, we propose a heuristic wave length routing algorithm for IP datagrams in WDM networks which operates in a distributed manner. We first present an efflcient construction method for a loose virtual topology with a required connectivity property, which reserves a few wavelengths to cope with dynamic trafflc d e mands properly. We then(More)
A key feature of the vehicular ad-hoc networks (VANETs) is to broadcast the beacon message containing the position, speed, heading, etc. However, the fixed-rate scheme in the current standards may incur too large traffic load to the DSRC channel leading to a significant degradation of the network performance. In this paper, we present a new beacon rate(More)
Accurate vehicle tracking is a principal requirement of vehicle safety critical applications. In vehicle-to-vehicle communication, vehicle tracking is achieved by broadcasting beacon containing state information of the sending vehicle in dedicated short range communication (DSRC) channel. Frequent beacon broadcasting can enhance vehicle tracking accuracy,(More)
Ship area networks (SANs) have lately attracted attention in order to guarantee the safety of sea travelers and marine transportation. The wireless sensor network (WSN) is one of the most important components of SAN because crew members must know any damage or malfunction of parts of ships promptly. The safety systems are mostly real-time applications, thus(More)
During the last two decades, wavelength conversion has received a considerable attention due to its strong influence on the blocking performance of wavelength-routed WDM networks. However, most of the related works focus on only one aspect of wavelength conversion, i.e., sparse or partial or limited wavelength conversion. Although these approaches(More)