Proceedings of the 21st Annual International Conference on Mobile Computing and Networking最新文献_第7页

Demo: FIT IoT-LABA: Large Scale Open Experimental IoT Testbed 演示:FIT IoT- laba:大型开放式实验物联网测试平台

Proceedings of the 21st Annual International Conference on Mobile Computing and Networking Pub Date : 2015-09-07 DOI: 10.1145/2789168.2789172

Gaetan Harter, R. Pissard-Gibollet, Frederic Saint-Marcel, G. Schreiner, J. Vandaele

引用次数: 5

CIDER: Enabling Robustness-Power Tradeoffs on a Computational Eyeglass CIDER:在计算眼镜上实现鲁棒性-功率权衡

Proceedings of the 21st Annual International Conference on Mobile Computing and Networking Pub Date : 2015-09-07 DOI: 10.1145/2789168.2790096

A. Mayberry, Yamin Tun, Pan Hu, Duncan Smith-Freedman, Deepak Ganesan, Benjamin M Marlin, C. Salthouse

{"title":"CIDER: Enabling Robustness-Power Tradeoffs on a Computational Eyeglass","authors":"A. Mayberry, Yamin Tun, Pan Hu, Duncan Smith-Freedman, Deepak Ganesan, Benjamin M Marlin, C. Salthouse","doi":"10.1145/2789168.2790096","DOIUrl":"https://doi.org/10.1145/2789168.2790096","url":null,"abstract":"The human eye offers a fascinating window into an individual's health, cognitive attention, and decision making, but we lack the ability to continually measure these parameters in the natural environment. The challenges lie in: a) handling the complexity of continuous high-rate sensing from a camera and processing the image stream to estimate eye parameters, and b) dealing with the wide variability in illumination conditions in the natural environment. This paper explores the power--robustness tradeoffs inherent in the design of a wearable eye tracker, and proposes a novel staged architecture that enables graceful adaptation across the spectrum of real-world illumination. We propose CIDER, a system that operates in a highly optimized low-power mode under indoor settings by using a fast Search-Refine controller to track the eye, but detects when the environment switches to more challenging outdoor sunlight and switches models to operate robustly under this condition. Our design is holistic and tackles a) power consumption in digitizing pixels, estimating pupillary parameters, and illuminating the eye via near-infrared, b) error in estimating pupil center and pupil dilation, and c) model training procedures that involve zero effort from a user. We demonstrate that CIDER can estimate pupil center with error less than two pixels (0.6O), and pupil diameter with error of one pixel (0.22mm). Our end-to-end results show that we can operate at power levels of roughly 7mW at a 4Hz eye tracking rate, or roughly 32mW at rates upwards of 250Hz.","PeriodicalId":424497,"journal":{"name":"Proceedings of the 21st Annual International Conference on Mobile Computing and Networking","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130225159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19

Poster: An Insomnia Therapy for Clock Synchronization in Wireless Sensor Networks 海报:无线传感器网络中时钟同步的失眠治疗

Proceedings of the 21st Annual International Conference on Mobile Computing and Networking Pub Date : 2015-09-07 DOI: 10.1145/2789168.2795184

Meng Jin, Dingyi Fang, Xiaojiang Chen, Lin X. Cai, Zhe Yang, Zhanyong Tang

{"title":"Poster: An Insomnia Therapy for Clock Synchronization in Wireless Sensor Networks","authors":"Meng Jin, Dingyi Fang, Xiaojiang Chen, Lin X. Cai, Zhe Yang, Zhanyong Tang","doi":"10.1145/2789168.2795184","DOIUrl":"https://doi.org/10.1145/2789168.2795184","url":null,"abstract":"Intermittent connection of wireless links, caused by low duty-cycle radio operation, harsh working environment, movement of sensor nodes, etc., makes clock synchronization a challenging task. Prior synchronization approaches in wireless sensor networks (WSNs) typically require that nodes exchange time messages frequently with the reference clock, which is difficult in networks with low or intermittent connectivity. This poster presents RobSync, a robust design for clock synchronization in intermittent-connected wireless networks. Having recognized that clock skew is highly correlated to the voltage supply, we use the local voltage information as a reference for clock self-calibration, which helps reduce the frequency of time-stamp exchanges. To prevent a misuse of the voltage information, leading to error accumulation, a re-synchronization interval adjustment design is developed to make a trade-off between accuracy and energy consumption. We present the theory behind RobSync, and provide preliminary results by experiments to compare our approach and the recent approach.","PeriodicalId":424497,"journal":{"name":"Proceedings of the 21st Annual International Conference on Mobile Computing and Networking","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133571631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Poster: Can Smart Devices Protect Us from Violent Crime? 海报:智能设备能保护我们免受暴力犯罪吗?

Proceedings of the 21st Annual International Conference on Mobile Computing and Networking Pub Date : 2015-09-07 DOI: 10.1145/2789168.2795160

Alan Ferrari, D. Puccinelli, S. Giordano

引用次数: 1

mZig mZig

Proceedings of the 21st Annual International Conference on Mobile Computing and Networking Pub Date : 2015-09-07 DOI: 10.1145/2789168.2790104

L. Kong, Xuemei Liu

{"title":"mZig","authors":"L. Kong, Xuemei Liu","doi":"10.1145/2789168.2790104","DOIUrl":"https://doi.org/10.1145/2789168.2790104","url":null,"abstract":"This paper presents mZig, a novel physical layer design that enables a receiver to simultaneously decode multiple packets from different transmitters in ZigBee. As a low-power and low-cost wireless protocol, the promising ZigBee has been widely used in sensor networks, cyber-physical systems, and smart buildings. Since ZigBee based networks usually adopt tree or cluster topology, the convergecast scenarios are common in which multiple transmitters need to send packets to one receiver. For example, in a smart home, all appliances report data to one control plane via ZigBee. However, concurrent transmissions in convergecast lead to the severe collision problem. The conventional ZigBee avoids collisions using backoff time, which introduces additional time overhead. Advanced methods resolve collisions instead of avoidance, in which the state-of-the-art ZigZag resolves one m-packet collision requiring m retransmissions. We propose mZig to resolve one m-packet collision by this collision itself, so the theoretical throughput is improved m-fold. Leveraging the unique features in ZigBee's physical layer including its chip rate, half-sine pulse shaping and O-QPSK modulation, mZig subtly decomposes multiple packets from one collision in baseband signal processing. The practical factors of noise, multipath, and frequency offset are taken into account in mZig design. We implement mZig on USRPs and establish a seven-node testbed. Experiment results demonstrate that mZig can receive up to four concurrent packets in our testbed. The throughput of mZig is 4.5x of the conventional ZigBee and 3.2x of ZigZag in the convergecast with four or more transmitters.","PeriodicalId":424497,"journal":{"name":"Proceedings of the 21st Annual International Conference on Mobile Computing and Networking","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124475862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 64

Kaleido: You Can Watch It But Cannot Record It 卡雷多:你可以看，但不能记录

Proceedings of the 21st Annual International Conference on Mobile Computing and Networking Pub Date : 2015-09-07 DOI: 10.1145/2789168.2790106

Lan Zhang, Cheng Bo, Jiahui Hou, Xiangyang Li, Yang Wang, Kebin Liu, Yunhao Liu

引用次数: 34

Rethinking Energy-Performance Trade-Off in Mobile Web Page Loading 重新思考移动网页加载中的能源性能权衡

Proceedings of the 21st Annual International Conference on Mobile Computing and Networking Pub Date : 2015-09-07 DOI: 10.1145/2789168.2790103

D. H. Bui, Yunxin Liu, Hyosu Kim, I. Shin, Feng Zhao

{"title":"Rethinking Energy-Performance Trade-Off in Mobile Web Page Loading","authors":"D. H. Bui, Yunxin Liu, Hyosu Kim, I. Shin, Feng Zhao","doi":"10.1145/2789168.2790103","DOIUrl":"https://doi.org/10.1145/2789168.2790103","url":null,"abstract":"Web browsing is a key application on mobile devices. However, mobile browsers are largely optimized for performance, imposing a significant burden on power-hungry mobile devices. In this work, we aim to reduce the energy consumed to load web pages on smartphones, preferably without increasing page load time and compromising user experience. To this end, we first study the internals of web page loading on smartphones and identify its energy-inefficient behaviors. Based on our findings, we then derive general design principles for energy-efficient web page loading, and apply these principles to the open-source Chromium browser and implement our techniques on commercial smartphones. Experimental results show that our techniques are able to achieve a 24.4% average system energy saving for Chromium on a latest-generation big.LITTLE smartphone using WiFi (a 22.5% saving when using 3G), while not increasing average page load time. We also show that our proposed techniques can bring a 10.5% system energy saving on average with a small 1.69% increase in page load time for mobile Firefox web browser. User study results indicate that such a small increase in page load time is hardly perceivable.","PeriodicalId":424497,"journal":{"name":"Proceedings of the 21st Annual International Conference on Mobile Computing and Networking","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125196371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 66

Poster: ParkMaster: Leveraging Edge Computing in Visual Analytics 海报:ParkMaster:在视觉分析中利用边缘计算

Proceedings of the 21st Annual International Conference on Mobile Computing and Networking Pub Date : 2015-09-07 DOI: 10.1145/2789168.2795174

Giulio Grassi, Matteo Sammarco, P. Bahl, K. Jamieson, G. Pau

引用次数: 9

Demo: Abstract: Live Adaptations of Low-power MAC Protocols 摘要:低功耗MAC协议的实时适配

Proceedings of the 21st Annual International Conference on Mobile Computing and Networking Pub Date : 2015-09-07 DOI: 10.1145/2789168.2789184

Georgios Z. Papadopoulos, A. Gallais, G. Schreiner, Thomas Noël

引用次数: 1

Poster: 3D Printing Your Wireless Coverage 海报:3D打印你的无线覆盖

Proceedings of the 21st Annual International Conference on Mobile Computing and Networking Pub Date : 2015-09-07 DOI: 10.1145/2789168.2795164

Justin Chan, Changxi Zheng, Xia Zhou

引用次数: 0