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In the DER scheme, all nodes try to forward their data packets toward the nodes that are optimal distance closer to the data sink. They also take the relaying node estimated lifetime into consideration in the selection process. When necessary, they will choose nodes that are closer to the data sink as relays or even the data sink itself. This distributed approach equalizes energy consumption of different relaying nodes based on their residual energy, balancing their expected lifetimes. We analyze our proposed scheme in both one-dimensional and two-dimensional networks with different setups including different residual energy, traffic rate, and network regions. Our study shows that the proposed scheme achieves a network lifetime close to the scheme based on linear programming techniques and global information or centralized processing. <\/jats:p>","DOI":"10.1155\/2012\/213598","type":"journal-article","created":{"date-parts":[[2012,7,19]],"date-time":"2012-07-19T10:22:04Z","timestamp":1342693324000},"page":"213598","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":1,"title":["An Online Relay Selection Scheme in Power Controllable Wireless Sensor Networks"],"prefix":"10.1177","volume":"8","author":[{"given":"Jing","family":"Deng","sequence":"first","affiliation":[{"name":"Department of Computer Science, The University of North Carolina at Greensboro, Greensboro, NC 27412, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Scott C.-H.","family":"Huang","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yunghsiang S.","family":"Han","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2012,6,6]]},"reference":[{"key":"B1-2012-213598","doi-asserted-by":"publisher","DOI":"10.1109\/MCOM.2002.1024422"},{"first-page":"1089","volume-title":"Proceedings of the 23rd Conference of the IEEE Communications Society (Infocom \u203204)","author":"Sankar A.","key":"B2-2012-213598"},{"key":"B3-2012-213598","doi-asserted-by":"publisher","DOI":"10.1504\/IJSNET.2006.012036"},{"first-page":"138","volume-title":"Proceedings of the 1st International Conference on Wireless Internet (WICON \u203205)","author":"Borghini M.","key":"B4-2012-213598"},{"key":"B5-2012-213598","doi-asserted-by":"publisher","DOI":"10.1145\/1921621.1921628"},{"key":"B6-2012-213598","doi-asserted-by":"publisher","DOI":"10.1023\/A:1013715909417"},{"key":"B8-2012-213598","doi-asserted-by":"publisher","DOI":"10.1109\/TWC.2002.804190"},{"key":"B9-2012-213598","doi-asserted-by":"publisher","DOI":"10.1109\/TNET.2002.808417"},{"key":"B10-2012-213598","doi-asserted-by":"publisher","DOI":"10.1109\/TNET.2004.833122"},{"key":"B11-2012-213598","series-title":"Lecture Notes in Computer Science (LNCS)","doi-asserted-by":"crossref","first-page":"56","DOI":"10.1007\/978-3-540-77024-4_7","volume-title":"Proceedings of the 3rd International Conference on Mobile Ad-Hoc and Sensor Networks (MSN \u203207)","volume":"4864","author":"Elhafsi E. 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