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Multi-channel MAC protocols are proposed to increase the capacity of wireless network. However, dynamic channel selection mechanism based on channel usage information from one-hop neighbor nodes causes multi-channel hidden node problems in a multi-channel multi-hop wireless network. In this paper, we propose a new approach of channel selection. Nodes snoop data channels during idle times and then...
In multihop wireless networks, packets of a traffic flow originating from a source node are relayed by intermediate nodes (relay nodes) and travel toward their destination node along a multihop wireless path. If a source node transmits excessive packets at a high rate, its relay node may not have enough channel access opportunities to forward them, resulting in a significant throughput decrease on...
In multihop wireless networks, packets from a source node are relayed by intermediate nodes (relay nodes) toward their destination node along a multihop wireless path. However, if a relay node simultaneously receives a large number of packets and fails to forward them at the same rate as they are received, the end-to-end throughput performance of the network degrades due to packet losses at the bottleneck...
As wireless networks become more pervasive throughout society, developments focus on establishing full mobility. This research examines the performance of Wi-Fi and Bluetooth networks in situations where both communication nodes are in motion. Throughput-testing software ran on two computers in an ad-hoc network, while located in separate cars driving on the highway in various configurations. Initial...
Energy consumption is of utmost importance in ad hoc wireless networks where battery-operated nodes have limited power resources. Energy consumption is also important in meshed WLAN networks such as emerging home entertainment networks and meshed WiMax metropolitan area networks. So far, it has been advocated that nodes have to operate at the lowest possible power level that keeps the network connected...
We develop and evaluate a new method for estimating and optimizing various performance metrics of multi-hop wireless networks, including MANETs. We introduce a simple approximate (throughput) loss model that couples the physical, MAC and routing layers effects. The model provides quantitative statistical relations between the loss parameters that are used to characterize multiuser interference and...
While the IEEE Task Group for the 802.11n network standard stalls on ratification, successful network deployments proceed apace, especially in universities. The IEEE 802.11n Task Group keeps pushing back the date for full ratification of the latest edition of the popular wireless network standard. The market, however, isn't waiting. Spearheaded by universities, the 802.11n technology has recently...
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