{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,4,4]],"date-time":"2025-04-04T04:05:40Z","timestamp":1743739540774,"version":"3.40.3"},"reference-count":23,"publisher":"Wiley","issue":"9","license":[{"start":{"date-parts":[[2012,7,5]],"date-time":"2012-07-05T00:00:00Z","timestamp":1341446400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Concurrency and Computation"],"published-print":{"date-parts":[[2013,6,25]]},"abstract":"<jats:title>SUMMARY<\/jats:title><jats:p>Although the demand for battery capacity on mobile devices has grown with the increase in high data rate applications, battery technology has not kept up with this demand. Therefore, the growth in energy demand coupled with global warming provide a new trend in wireless communication known as energy\u2010efficient transmission. In this paper, the energy\u2010efficient resource allocation for a two\u2010hop uplink multiuser relay\u2010based system is studied. We adopt the orthogonal frequency division multiplexing as the physical layer modulation technique. Assuming that the base station has all the channel state information, an energy efficiency optimization problem by joint subcarrier assignment, bit and power allocation is formulated. We first develop a near\u2010optimal resource allocation scheme to maximize the overall energy efficiency; then, an efficient resource allocation algorithm is provided to solve the problem with relatively low computational complexity. Furthermore, fairness constraint among users is imposed on the system to guarantee each user's QoS. Our joint resource allocation algorithm is proved to achieve a considerable improvement in terms of energy\u2010saving and simultaneously decreases outage probability by simulation results. Copyright \u00a9 2012 John Wiley &amp; Sons, Ltd.<\/jats:p>","DOI":"10.1002\/cpe.2878","type":"journal-article","created":{"date-parts":[[2012,7,5]],"date-time":"2012-07-05T15:12:05Z","timestamp":1341501125000},"page":"1113-1125","source":"Crossref","is-referenced-by-count":5,"title":["Energy\u2010efficient resource allocation in multiuser relay\u2010based OFDMA networks"],"prefix":"10.1002","volume":"25","author":[{"given":"Jianhua","family":"Zhang","sequence":"first","affiliation":[{"name":"Key Laboratory of Universal Wireless Communications, Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 P. R. China"}]},{"given":"Yun","family":"Jiang","sequence":"additional","affiliation":[{"name":"Key Laboratory of Universal Wireless Communications, Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 P. R. China"}]},{"given":"Xiaofan","family":"Li","sequence":"additional","affiliation":[{"name":"Key Laboratory of Universal Wireless Communications, Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 P. R. China"}]}],"member":"311","published-online":{"date-parts":[[2012,7,5]]},"reference":[{"key":"e_1_2_7_2_1","unstructured":"KellyT.ICTs and climate change.Tech. Rep. ITU\u2010T Technology Geneva May2008."},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1098\/rsta.2007.2052"},{"key":"e_1_2_7_4_1","doi-asserted-by":"crossref","unstructured":"LahiriK RaghunathanA DeyS PanigrahiD.Battery\u2010driven system design: A new frontier in low power design.Proc. 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IEEE Wireless Telecommunications Symposium Beijing China Apr.2007;1\u20135.","DOI":"10.1109\/WTS.2007.4563310"},{"key":"e_1_2_7_15_1","doi-asserted-by":"publisher","DOI":"10.1109\/7693.994816"},{"issue":"2","key":"e_1_2_7_16_1","first-page":"2727","article-title":"Subcarrier Power Allocation in OFDM Multi\u2010Hop Relaying System","volume":"31","author":"Li J","year":"2008","journal-title":"Journal of Beijing University of Posts and Telecommunications"},{"key":"e_1_2_7_17_1","doi-asserted-by":"publisher","DOI":"10.1109\/JSAC.2004.830916"},{"issue":"1","key":"e_1_2_7_18_1","first-page":"3306","article-title":"An energy\u2010efficient approach to power control and receiver design in wireless networks","volume":"5","author":"Meshkati F","year":"2006","journal-title":"IEEE Transactions on Communications"},{"key":"e_1_2_7_19_1","doi-asserted-by":"publisher","DOI":"10.1109\/TCOMM.2004.833191"},{"key":"e_1_2_7_20_1","first-page":"1","article-title":"Optimally joint subcarrier matching and power allocation in OFDM multihop system","author":"Wang W","year":"2008","journal-title":"EURASIP Journal on Advances in Signal Processing"},{"key":"e_1_2_7_21_1","doi-asserted-by":"publisher","DOI":"10.1109\/TCOMM.2010.02.080587"},{"key":"e_1_2_7_22_1","doi-asserted-by":"publisher","DOI":"10.1017\/CBO9780511804441"},{"key":"e_1_2_7_23_1","unstructured":"Spatial channel model for multiple input multi output (mimo) simulation. 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