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The prior art, an RRC-state based power model, was developed primarily to model the modem energy drain of application data transfer. As such, it serves well its original purpose, but is insufficient to study detailed modem behavior, e.g., activities in the control plane.<\/jats:p>\n          <jats:p>In this paper, we propose a new methodology of modeling modem power draw behavior at the event-granularity, and develop to our knowledge the first fine-grained modem power model that captures the power draw of all LTE modem radio-on events in different RRC modes. Second, we quantitatively demonstrate the advantages of the new model over the state-based power model under a wide variety of context via controlled experiments. Finally, using our fine-grained modem power model, we perform the first detailed modem energy drain in-the-wild study involving 12 Nexus 6 phones under normal usage by 12 volunteers spanning a total of 348 days. Our study provides the first quantitative analysis of energy drain due to modem control activities in the wild and exposes their correlation with context such as location and user mobility.<\/jats:p>","DOI":"10.1145\/3154504","type":"journal-article","created":{"date-parts":[[2018,3,23]],"date-time":"2018-03-23T18:28:08Z","timestamp":1521829688000},"page":"1-28","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":10,"title":["A Fine-grained Event-based Modem Power Model for Enabling In-depth Modem Energy Drain Analysis"],"prefix":"10.1145","volume":"1","author":[{"given":"Xiaomeng","family":"Chen","sequence":"first","affiliation":[{"name":"Purdue University, West Lafayette, IN, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jiayi","family":"Meng","sequence":"additional","affiliation":[{"name":"Purdue University, West Lafayette, IN, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Y. 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Proc. of International workshop on application of green techniques to emerging communication and computing paradigms (GCC).  Pilar Andres-Maldonado Pablo Ameigeiras Jonathan Prados-Garzon Juan J. Ramos-Munoz and Juan M. Lopez-Soler. 2017. Optimized LTE Data Transmission Procedures for IoT: Device Side Energy Consumption Analysis. Proc. of International workshop on application of green techniques to emerging communication and computing paradigms (GCC).","DOI":"10.1109\/ICCW.2017.7962714"},{"key":"e_1_2_1_6_1","doi-asserted-by":"publisher","DOI":"10.1145\/1644893.1644927"},{"key":"e_1_2_1_7_1","doi-asserted-by":"publisher","DOI":"10.1145\/339647.339657"},{"key":"e_1_2_1_8_1","doi-asserted-by":"crossref","unstructured":"A. Catovic M. Narang and A. Taha. 2007. Impact of SIB Scheduling on the Standby Battery Life of Mobile Devices in UMTS. 2007 16th IST Mobile and Wireless Communications Summit. 1--5.  A. Catovic M. Narang and A. Taha. 2007. 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