Jae-Young Pyun

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Real-time health monitoring with wearable sensors is an active area of research. In this domain, observing the physical condition of elderly people or patients in personal environments such as home, office, and restroom has special significance because they might be unassisted in these locations. The elderly people have limited physical abilities and are(More)
In this paper, we propose a measurement based TCP-friendly rate control (TFRC) that adjusts the coding rates according to the channel characteristics of the wireless-to-wired network. To avoid the throughput degradation of multimedia flows traveling through wireless link, the proposed rate control system employs a new loss differentiation algorithm using(More)
Wireless Body Area Network (WBAN) is a special purpose sensor application network which can be applied for applications relating to the health care. WBAN should support immediate and reliable data transmission for medical service during an emergency situation. Hence this paper proposes a new MAC superframe structure which can handle emergency data as well(More)
In this paper, we present a new medium access control (MAC) protocol called Radio Triggered Sensor MAC (RTM) protocol that is expected for the next generation sensor network. The proposed RTM is a cross-layer MAC protocol which utilizes the passive radio sensor hardware for efficient medium access. The passive radio sensors harvest the energy from the(More)
Energy conservation is one of the most discussed issues in wireless sensor network (WSN) application and protocol designs. Conventional routing protocols such as LEACH, PEGASIS, and concentric clustering scheme (CCS) try to minimize energy consumption, but the consumed energy is still high because of redundant data transmission and various distances between(More)
Mobile ad hoc networks (MANETs) are collections of autonomous mobile nodes with links that are made or broken in an arbitrary way. Due to frequent node and link failures, multipath MANET is preferred than single-path MANET in many applications. Multipath routing schemes are used for achieving various goals such as robustness, reliability, and load(More)