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)
— 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)
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 hot spots 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 medium access control (MAC) does not work well in resolving inter-BSS interference(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)
Wireless networks have raised great attention in the past decades because they provide tether-free connectivity. Although much of the effort in wireless network research has been spent on reducing the interference among the communication nodes, the problem remains open. In this dissertation, we propose a learning-based approach to alleviate wireless(More)
Contention-based MAC protocols such as IEEE 802.11 DCF are known to perform well in a network with small number of nodes. As the number of nodes increases, the cost of collisions increases and dominates. This increasing collisions quickly drives every client in the network into wasted and unfair idleness, resulting in performance degradation. In this paper,(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)