Medium Access Control for Opportunistic Concurrent Transmissions under Shadowing ChannelsReport as inadecuate




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1

Department of Electrical and Computer Engineering, Auburn University, Auburn, AL 36849, USA

2

Center for u-Manufacturing, Pohang University of Science and Technology, Pohang, Korea





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Abstract We study the problem of how to alleviate the exposed terminal effect in multihop wireless networks in the presence of log-normal shadowing channels. Assuming node location information, we propose an extension of the IEEE 802.11 MAC protocol that schedules concurrent transmissions in the presence of log-normal shadowing, thus mitigating the exposed terminal problem and improving network throughput and delay performance. We observe considerable improvements in throughput and delay achieved over the IEEE 802.11 MAC under various network topologies and channel conditions in ns-2 simulations, which justify the importance of considering channel randomness in MAC protocol design for multihop wireless networks. View Full-Text

Keywords: exposed terminal; IEEE 802.11 MAC; Log-normal shadowing; media access control; multi-hop wireless networks exposed terminal; IEEE 802.11 MAC; Log-normal shadowing; media access control; multi-hop wireless networks





Author: In Keun Son 1, Shiwen Mao 1,* and Seung Min Hur 2

Source: http://mdpi.com/



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