Chun-cheng Chen

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The majority of existing wireless rate controls are based on the implicit assumption that frames are corrupted due to the random, arbitrary environmental and thermal noises. They generally reduce the channel rate on frame losses, trading lower efficiency in frequency band utilization for more robust modulation so that the current noise level may be(More)
Current 802.11 1 WLANs rely on the 802.11 MAC (medium access control) and careful channel assignment to resolve intra-and inter-BSS (basic service set) interferences respectively. However, because wireless transmissions interfere with each other in a range that is larger than the communication range and because there is only a very limited number of(More)
— The limited number of orthogonal channels and autonomous installations of hotspots and home wireless networks often leave neighboring 802.11 basic service sets (BSSs) operating on the same or overlapping channels, therefore interfering with each other. However, the 802.11 MAC does not work well in resolving inter-BSS interference due to the well-known(More)
—As more and more cities plan to deploy municipal wireless mesh networks to provide publicly-accessible infrastructure , it becomes critical to come up with a deployment plan that provides sufficient accessibility with financial and technological constraints. In this paper, we consider deploying the mesh routers that are equipped with directional antennas(More)
— The limited number of orthogonal channels and the autonomous installations of hotspots and home wireless networks often leave neighboring 802.11 basic service sets (BSS's) operating on the same or overlapping channels, therefore interfering with each other. However, the 802.11 MAC does not work well in resolving inter-BSS interferences due to the(More)
Chemotherapeutic agents have been used as an adjunct to mechanical debridement for peri-implantitis treatment. The present in vitro study evaluated and compared the effectiveness of hypochlorous acid (HOCl), sodium hypochlorite (NaOCl), and chlorhexidine (CHX) at eliminating Gram-negative (E. coli and P. gingivalis) and Gram-positive (E. faecalis and S.(More)
—In this paper, we propose Opportunistic Carrier Prediction (OCP) that jointly addresses exposed terminal and hidden terminal problems in wireless networks. OCP is based on the rationale that past interference information can be a good indicator for the outcome of future packet delivery. Therefore, each OCP sender maintains a summary of past interference(More)