Yuan-Chun Tsai

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In this paper, we propose a cross routing and MAC QoS protocol design, named Signal-to-Interferenceplus-Noise-Ratio and Quality-of-Service (SINR-QoS), for wireless ad hoc networks. SINR-QoS is spatial-reuse time division multiple access (STDMA)-based. Unlike most of the conventional approaches, SINR-QoS manages the spatial reuse based on SINR. When a data(More)
Wireless local area networks (WLANs) have been globally deployed for years. Today, most WLANs adopt IEEE 802.11 distributed coordination function (DCF) for stations to share the medium. IEEE 802.11 DCF employs contention-based channel access, and as generally known, collision will happen when multiple stations launch transmissions simultaneously. However,(More)
End-to-end quality-of-service (QoS) in wireless multihop ad hoc networks is a challenging issue, especially when the wireless channels suffer from time-varying fading. In this paper, we develop a spatial-reuse time-division multiple access (STDMA)-based QoS routing protocol, named supplementary-cooperation routing (SC-routing). SC-routing can provide the(More)
We demonstrated a low voltage polymer-stabilized blue phase liquid crystal (BPLC) by red-shifting the Bragg reflection to the visible region. To retain high contrast ratio, the BPLC is sandwiched between two crossed circular polarizers. The driving voltage is reduced by 35% compared to that of a transparent BPLC, while keeping submillisecond response time.(More)
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