{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,2,21]],"date-time":"2025-02-21T12:42:58Z","timestamp":1740141778818,"version":"3.37.3"},"reference-count":22,"publisher":"SAGE Publications","issue":"5","license":[{"start":{"date-parts":[[2012,5,1]],"date-time":"2012-05-01T00:00:00Z","timestamp":1335830400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["International Journal of Distributed Sensor Networks"],"published-print":{"date-parts":[[2012,5,1]]},"abstract":"<jats:p> Mobility-assistant sensor networks comprise mobile elements, and static sensors are established for the purpose of solving the serious problems such as overlapping or energy holes in wireless sensor networks (WSNs). In such systems, most of the energy is consumed when the radios are on, waiting for a mobile sink (MS) to arrive. Sleep\/wake scheduling is an effective mechanism to prolong the lifetime of these energy-constrained wireless sensors. However, sleep\/wake scheduling could result in substantial discovery delays because the sensor needs time to receive the beacon-ID signals when MS entered its communication range. In this paper, we first study on the MS discovery mechanism and the factors which affect the efficiency of data collection. Based on these results, we then provide a solution to the control problem of how to optimally adjust the system parameters of the sleep\/wake scheduling protocol to maximize the network lifetime, subject to a constraint on the expected residual contact time. Our numerical results indicate that the proposed solution can balance the network consumption, especially in sparse sensor networks. <\/jats:p>","DOI":"10.1155\/2012\/947251","type":"journal-article","created":{"date-parts":[[2012,5,10]],"date-time":"2012-05-10T21:04:10Z","timestamp":1336683850000},"page":"947251","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":3,"title":["Time-Independent Data Collection Protocol in Mobility-Assistant Wireless Sensor Networks with Duty Cycles"],"prefix":"10.1177","volume":"8","author":[{"given":"Xiwei","family":"Zhang","sequence":"first","affiliation":[{"name":"Department of Computer Science, Nanjing University, Nanjing 210000, China"},{"name":"State Key Laboratory for Novel Software Technology, Nanjing University, Nanjing 210000, China"},{"name":"Department of Computer and Information, Hohai University, Nanjing 210000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lijie","family":"Xu","sequence":"additional","affiliation":[{"name":"Department of Computer Science, Nanjing University, Nanjing 210000, China"},{"name":"State Key Laboratory for Novel Software Technology, Nanjing University, Nanjing 210000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guihai","family":"Chen","sequence":"additional","affiliation":[{"name":"Department of Computer Science, Nanjing University, Nanjing 210000, China"},{"name":"State Key Laboratory for Novel Software Technology, Nanjing University, Nanjing 210000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2012,5,10]]},"reference":[{"first-page":"51","volume-title":"Proceedings of the 3rd International Conference on Embedded Networked Sensor Systems (SenSys '05)","author":"Tolle G.","key":"B1-2012-947251"},{"first-page":"375","volume-title":"Proceedings of the ACM (IASTED '04)","author":"Mayer K.","key":"B2-2012-947251"},{"key":"B3-2012-947251","doi-asserted-by":"publisher","DOI":"10.1145\/1142473.1142491"},{"key":"B4-2012-947251","doi-asserted-by":"publisher","DOI":"10.1109\/IPDPS.2005.267"},{"key":"B5-2012-947251","doi-asserted-by":"publisher","DOI":"10.1016\/j.comnet.2004.06.007"},{"first-page":"150","volume-title":"Proceedings of the 1st International Conference on Embedded Networked Sensor Systems (SenSys '05)","author":"Aslam J.","key":"B6-2012-947251"},{"key":"B7-2012-947251","doi-asserted-by":"publisher","DOI":"10.1093\/comjnl\/bxq038"},{"first-page":"129","volume-title":"Proceedings of the ACM 2nd International Workshop on Information Processing in Sensor Networks(IPSN '03)","author":"Chakrabarti A.","key":"B8-2012-947251"},{"key":"B9-2012-947251","doi-asserted-by":"publisher","DOI":"10.1109\/INFCOM.2011.5935040"},{"key":"B10-2012-947251","doi-asserted-by":"publisher","DOI":"10.1109\/IWQoS.2009.5201405"},{"key":"B11-2012-947251","doi-asserted-by":"publisher","DOI":"10.1109\/WOWMOM.2006.73"},{"first-page":"377","volume-title":"Proceedings of the IEEE Global Telecommunications Conference (GLOBECOM '03)","author":"Gandham S. 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