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Full-Text Articles in Physical Sciences and Mathematics
Improving Channel Throughput Of Wlans And Ad Hoc Networks Using Explicit Denial Of Requests, Maggie Xiaoyan Cheng, Yadi Ma, Yi Wang
Improving Channel Throughput Of Wlans And Ad Hoc Networks Using Explicit Denial Of Requests, Maggie Xiaoyan Cheng, Yadi Ma, Yi Wang
Computer Science Faculty Research & Creative Works
A new Multiple Access Control scheme for wireless ad hoc networks and WLANs is proposed. This scheme uses explicit denial of channel requests and a busy tone to improve channel throughput. Performance analysis shows significant improvement when the network is under heavy traffic load.
New Graph Model For Channel Assignment In Ad Hoc Wireless Networks, Maggie Xiaoyan Cheng, S. C. Huang, X. Huang, Weili Wu
New Graph Model For Channel Assignment In Ad Hoc Wireless Networks, Maggie Xiaoyan Cheng, S. C. Huang, X. Huang, Weili Wu
Computer Science Faculty Research & Creative Works
The channel assignment problem in ad hoc wireless networks is investigated. The problem is to assign channels to hosts in such a way that interference among hosts is eliminated and the total number of channels is minimised. Interference is caused by direct collisions from hosts that can hear each other or indirect collisions from hosts that cannot hear each other, but simultaneously transmit to the same destination. A new class of disk graphs (FDD: interFerence Double Disk graphs) is proposed that include both kinds of interference edges. Channel assignment in wireless networks is a vertex colouring problem in FDD graphs. …
Energy Balanced Broadcasting Through Delayed Intelligence, Michael R. Gosnell, Ryan Arbarelli, Maggie Xiaoyan Cheng, Bruce M. Mcmillin
Energy Balanced Broadcasting Through Delayed Intelligence, Michael R. Gosnell, Ryan Arbarelli, Maggie Xiaoyan Cheng, Bruce M. Mcmillin
Computer Science Faculty Research & Creative Works
Ad hoc wireless networks are growing in popularity and usefulness, however they rely on broadcasting as a fundamental process for routing. Improvements to broadcasting have made ad hoc networks more feasible, but sometimes benefit only specific situations. Delayed intelligence (DI) is proposed as a new load balancing approach where small delays are introduced to allow distributed responsibility delegation. Preliminary results show delayed intelligence, when applied in existing broadcasting methods such as passive clustering, can be used to improve the energy disparity and therefore extend ad hoc network lifetime.
Topology Control Of Ad Hoc Wireless Networks For Energy Efficiency, Maggie Xiaoyan Cheng, Mihaela Cardei, Jinhua Sun, Xiaochun Cheng, Lusheng Wang, Yinfeng Xu, Ding-Zhu Du
Topology Control Of Ad Hoc Wireless Networks For Energy Efficiency, Maggie Xiaoyan Cheng, Mihaela Cardei, Jinhua Sun, Xiaochun Cheng, Lusheng Wang, Yinfeng Xu, Ding-Zhu Du
Computer Science Faculty Research & Creative Works
In ad hoc wireless networks, to compute the transmission power of each wireless node such that the resulting network is connected and the total energy consumption is minimized is defined as a Minimum Energy Network Connectivity (MENC) problem, which is an NP-complete problem. In this paper, we consider the approximated solutions for the MENC problem in ad hoc wireless networks. We present a theorem that reveals the relation between the energy consumption of an optimal solution and that of a spanning tree and propose an optimization algorithm that can improve the result of any spanning tree-based topology. Two polynomial time …