naa a22 4500 510798012 CHVBK 20180411083343.0 cr unu---uuuuu 180411e20131001xx s 000 0 eng 10.1007/s11277-013-1130-z doi (NATIONALLICENCE)springer-10.1007/s11277-013-1130-z On the Design of Energy Efficient Transmission in Cooperative Networks with Bidirectional Asymmetric Traffic [Elektronische Daten] [Rong Huang, Chunyan Feng, Tiankui Zhang] Energy efficient transmission has become increasingly important in future green communications. We focus on cooperative networks with multiple Amplify-and-Forward relays deployed in this paper. A joint relay selection and power allocation transmission scheme applicable to both one-way and two-way relay networks is proposed for minimizing the weighted energy consumed per bit transmitted. Close-form analytical results of power allocation are first developed at each relay. Then the relay consuming the least energy or the direct transmission mode is chosen by the sources. Based on the proposed scheme, we characterize the energy consumption for training and power allocation information exchanging between nodes. Besides, the energy efficient cooperating regions are discussed in one-way and two-way relay networks. It is indicated that the shape of the region depends on both the path loss exponent and the asymmetry traffic in the one-way relay network while only lies on the path loss exponent in the two-way relay network. Simulation results demonstrate that the proposed scheme yields considerable reduced energy consumption compared to that of the best worse relay selection scheme when proper number of relays is deployed. It is also shown that the two-way relaying can achieve higher energy efficiency than the one-way relaying. Springer Science+Business Media New York, 2013 Energy efficiency nationallicence AF relay nationallicence Relay selection nationallicence Power allocation nationallicence Huang Rong School of Information and Engineering, Beijing University of Posts and Telecommunications, 100876, Beijing, People's Republic of China aut Feng Chunyan School of Information and Engineering, Beijing University of Posts and Telecommunications, 100876, Beijing, People's Republic of China aut Zhang Tiankui School of Information and Engineering, Beijing University of Posts and Telecommunications, 100876, Beijing, People's Republic of China aut Wireless Personal Communications Springer US; http://www.springer-ny.com 72/3(2013-10-01), 1707-1722 0929-6212 72:3<1707 2013 72 11277 https://doi.org/10.1007/s11277-013-1130-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-013-1130-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Huang Rong School of Information and Engineering, Beijing University of Posts and Telecommunications, 100876, Beijing, People's Republic of China aut NATIONALLICENCE 700 1- Feng Chunyan School of Information and Engineering, Beijing University of Posts and Telecommunications, 100876, Beijing, People's Republic of China aut NATIONALLICENCE 700 1- Zhang Tiankui School of Information and Engineering, Beijing University of Posts and Telecommunications, 100876, Beijing, People's Republic of China aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 72/3(2013-10-01), 1707-1722 0929-6212 72:3<1707 2013 72 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer