naa a22 4500 510798225 CHVBK 20180411083344.0 cr unu---uuuuu 180411e20131001xx s 000 0 eng 10.1007/s11277-013-1141-9 doi (NATIONALLICENCE)springer-10.1007/s11277-013-1141-9 Traffic-Aware Link Rate Adaptation for Multi-rate 802.11 Networks [Elektronische Daten] [Xin Ao, Shengming Jiang, Huaqiang Yuan] 802.11 networks provide multi-rate capability to offer rate adaptability against the time-varying wireless channel. However, how to switch between the available rates has not been standardized. Existing rate adaptation (RA) solutions assume common transmission power and can only passively tune link rate to match the inferred channel condition via different methods. This simple attitude is neither flexible in traffic-aware link rate selection nor effective in energy conservation and spatial reuse since transmission power may be either too low to sustain the link rate or too high that results in unnecessary energy consumption and worse spatial reuse. Different from existing solutions, we think that link rate switch should be driven by traffic load and power control should be considered with rate adaptation together to conserve energy and increase spatial reuse. To this end, we propose a traffic-aware link rate adaptation scheme (TARA) via power control for multi-rate 802.11 networks. Its basic idea consists of a two-step procedure. Firstly, traffic load is sensed in the MAC layer to decide whether link rate should be increased or decreased for the next transmission. Afterwards, power control is carried out in the PHY layer to guarantee that the new link rate can be sustained while minimizing the transmission power. Extensive simulation results show that TARA outperforms typical existing schemes in terms of energy efficiency and throughput. Springer Science+Business Media New York, 2013 Rate adaptation nationallicence Power control nationallicence Multi-rate nationallicence 802.11 networks nationallicence Ao Xin Engineering and Technology Institute, Dongguan University of Technology, Dongguan, People's Republic of China aut Jiang Shengming Marine Internet Laboratory (MILAB), College of Information Engineering, Shanghai Maritime University, Shanghai, People's Republic of China aut Yuan Huaqiang Engineering and Technology Institute, Dongguan University of Technology, Dongguan, People's Republic of China aut Wireless Personal Communications Springer US; http://www.springer-ny.com 72/4(2013-10-01), 2155-2175 0929-6212 72:4<2155 2013 72 11277 https://doi.org/10.1007/s11277-013-1141-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-013-1141-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ao Xin Engineering and Technology Institute, Dongguan University of Technology, Dongguan, People's Republic of China aut NATIONALLICENCE 700 1- Jiang Shengming Marine Internet Laboratory (MILAB), College of Information Engineering, Shanghai Maritime University, Shanghai, People's Republic of China aut NATIONALLICENCE 700 1- Yuan Huaqiang Engineering and Technology Institute, Dongguan University of Technology, Dongguan, People's Republic of China aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 72/4(2013-10-01), 2155-2175 0929-6212 72:4<2155 2013 72 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer