Proceedings of the 27th Annual International Conference on Mobile Computing and Networking最新文献_第8页

Shrimp: a robust underwater visible light communication system 虾:一个强大的水下可见光通信系统

Proceedings of the 27th Annual International Conference on Mobile Computing and Networking Pub Date : 2021-09-09 DOI: 10.1145/3447993.3448616

Chi Lin, Yong-lin Yu, Jie Xiong, Yichuan Zhang, Lei Wang, Guowei Wu, Zhongxuan Luo

引用次数: 17

Large-scale vehicle trajectory reconstruction with camera sensing network 基于摄像头传感网络的大规模车辆轨迹重建

Proceedings of the 27th Annual International Conference on Mobile Computing and Networking Pub Date : 2021-09-09 DOI: 10.1145/3447993.3448617

Panrong Tong, Mingqian Li, Mo Li, Jianqiang Huang, Xiansheng Hua

{"title":"Large-scale vehicle trajectory reconstruction with camera sensing network","authors":"Panrong Tong, Mingqian Li, Mo Li, Jianqiang Huang, Xiansheng Hua","doi":"10.1145/3447993.3448617","DOIUrl":"https://doi.org/10.1145/3447993.3448617","url":null,"abstract":"Vehicle trajectories provide essential information to understand the urban mobility and benefit a wide range of urban applications. State-of-the-art solutions for vehicle sensing may not build accurate and complete knowledge of all vehicle trajectories. In order to fill the gap, this paper proposes VeTrac, a comprehensive system that employs widely deployed traffic cameras as a sensing network to trace vehicle movements and reconstruct their trajectories in a large scale. VeTrac fuses mobility correlation and vision-based analysis to reduce uncertainties in identifying vehicles. A graph convolution process is employed to maintain the identity consistency across different camera observations, and a self-training process is invoked when aligning with the urban road network to reconstruct vehicle trajectories with confidence. Extensive experiments with real-world data input of over 7 million vehicle snapshots from over one thousand traffic cameras demonstrate that VeTrac achieves 98% accuracy for simple expressway scenario and 89% accuracy for complex urban environment. The achieved accuracy outperforms alternative solutions by 32% for expressway scenario and by 59% for complex urban environment.","PeriodicalId":177431,"journal":{"name":"Proceedings of the 27th Annual International Conference on Mobile Computing and Networking","volume":"16 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124613617","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: 21

A principled design for passive light communication 无源光通信的原理设计

Proceedings of the 27th Annual International Conference on Mobile Computing and Networking Pub Date : 2021-09-09 DOI: 10.1145/3447993.3448629

S. Ghiasi, Marco Zúñiga, K. Langendoen

{"title":"A principled design for passive light communication","authors":"S. Ghiasi, Marco Zúñiga, K. Langendoen","doi":"10.1145/3447993.3448629","DOIUrl":"https://doi.org/10.1145/3447993.3448629","url":null,"abstract":"To take advantage of Visible Light Communication (VLC) for low-power applications, such as IoT tags, researchers have been developing systems to modulate (backscatter) ambient light using LC shutters. Various approaches have been explored for single-pixel transmitters, but without following a principled approach. This has resulted in either relatively low data rates, short ranges, or the need for powerful artificial light sources. This paper takes a step back and proposes a more theoretical framework: ChromaLux. By considering the fundamental characteristics of liquid crystals (birefringence and thickness), we demonstrate that the design space is way larger than previously explored, allowing for much better systems. In particular, we uncover the existence of a transient state where the switching time can be reduced by an order of magnitude without lowering the contrast significantly, improving both range and data rate. Using a prototype, we demonstrate that our framework is applicable to different LCs. Our results show significant improvements over state-of-the-art single-pixel systems, achieving ranges of 50 meters at 1 kbps and with bit-error-rates below 1%.","PeriodicalId":177431,"journal":{"name":"Proceedings of the 27th Annual International Conference on Mobile Computing and Networking","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131178237","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: 20

EarGate: gait-based user identification with in-ear microphones EarGate:带入耳式麦克风的基于步态的用户识别

Proceedings of the 27th Annual International Conference on Mobile Computing and Networking Pub Date : 2021-08-27 DOI: 10.1145/3447993.3483240

Andrea Ferlini, Dong Ma, R. Harle, C. Mascolo

引用次数: 31

Shrimp 虾

Proceedings of the 27th Annual International Conference on Mobile Computing and Networking Pub Date : 2021-08-26 DOI: 10.4135/9781412953924.n979

Chi Lin, Yong-lin Yu, Jie Xiong, Yichuan Zhang, Lei Wang, Guowei Wu, Zhongxuan Luo

引用次数: 1

DeepRadar

Proceedings of the 27th Annual International Conference on Mobile Computing and Networking Pub Date : 2021-08-26 DOI: 10.1145/3447993.3448632

Shamik Sarkar, M. Buddhikot, Aniqua Z. Baset, S. Kasera

引用次数: 11

HeadFi

Proceedings of the 27th Annual International Conference on Mobile Computing and Networking Pub Date : 2021-08-26 DOI: 10.1145/3447993.3448624

Xiaoran Fan, Longfei Shangguan, Siddharth Rupavatharam, Yanyong Zhang, Jie Xiong, Yunfei Ma, R. Howard

{"title":"HeadFi","authors":"Xiaoran Fan, Longfei Shangguan, Siddharth Rupavatharam, Yanyong Zhang, Jie Xiong, Yunfei Ma, R. Howard","doi":"10.1145/3447993.3448624","DOIUrl":"https://doi.org/10.1145/3447993.3448624","url":null,"abstract":"Headphones continue to become more intelligent as new functions (e.g., touch-based gesture control) appear. These functions usually rely on auxiliary sensors (e.g., accelerometer and gyroscope) that are available in smart headphones. However, for those headphones that do not have such sensors, supporting these functions becomes a daunting task. This paper presents HeadFi, a new design paradigm for bringing intelligence to headphones. Instead of adding auxiliary sensors into headphones, HeadFi turns the pair of drivers that are readily available inside all headphones into a versatile sensor to enable new applications spanning across mobile health, user-interface, and context-awareness. HeadFi works as a plug-in peripheral connecting the headphones and the pairing device (e.g., a smartphone). The simplicity (can be as simple as only two resistors) and small form factor of this design lend itself to be embedded into the pairing device as an integrated circuit. We envision HeadFi can serve as a vital supplementary solution to existing smart headphone design by directly transforming large amounts of existing \"dumb\" headphones into intelligent ones. We prototype HeadFi on PCB and conduct extensive experiments with 53 volunteers using 54 pairs of non-smart headphones under the institutional review board (IRB) protocols. The results show that HeadFi can achieve 97.2%--99.5% accuracy on user identification, 96.8%--99.2% accuracy on heart rate monitoring, and 97.7%--99.3% accuracy on gesture recognition.","PeriodicalId":177431,"journal":{"name":"Proceedings of the 27th Annual International Conference on Mobile Computing and Networking","volume":"183 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115413838","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: 25

A nationwide census on wifi security threats: prevalence, riskiness, and the economics 关于wifi安全威胁的全国普查:普遍性、风险和经济性

Proceedings of the 27th Annual International Conference on Mobile Computing and Networking Pub Date : 2021-08-26 DOI: 10.1145/3447993.3448620

Di Gao, Hao Lin, Zhenhua Li, Feng Qian, Qi Alfred Chen, Zhiyun Qian, Wei Liu, Liangyi Gong, Yunhao Liu

{"title":"A nationwide census on wifi security threats: prevalence, riskiness, and the economics","authors":"Di Gao, Hao Lin, Zhenhua Li, Feng Qian, Qi Alfred Chen, Zhiyun Qian, Wei Liu, Liangyi Gong, Yunhao Liu","doi":"10.1145/3447993.3448620","DOIUrl":"https://doi.org/10.1145/3447993.3448620","url":null,"abstract":"Carrying over 75% of the last-mile mobile Internet traffic, WiFi has inevitably become an enticing target for various security threats. In this work, we characterize a wide variety of real-world WiFi threats at an unprecedented scale, involving 19 million WiFi access points (APs) mostly located in China, by deploying a crowdsourced security checking system on 14 million mobile devices in the wild. Leveraging the collected data, we reveal the landscape of nationwide WiFi threats for the first time. We find that the prevalence, riskiness, and breakdown of WiFi threats deviate significantly from common understandings and prior studies. In particular, we detect attacks at around 4% of all WiFi APs, uncover that most WiFi attacks are driven by an underground economy, and provide strong evidence of web analytics platforms being the bottleneck of its monetization chain. Further, we provide insightful guidance for defending against WiFi attacks at scale, and some of our efforts have already yielded real-world impact---effectively disrupted the WiFi attack ecosystem.","PeriodicalId":177431,"journal":{"name":"Proceedings of the 27th Annual International Conference on Mobile Computing and Networking","volume":"201 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123611698","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: 5

A community-driven approach to democratize access to satellite ground stations 以社区为导向，使卫星地面站的使用民主化

Proceedings of the 27th Annual International Conference on Mobile Computing and Networking Pub Date : 2021-08-26 DOI: 10.1145/3447993.3448630

Vaibhav Singh, Akarsh Prabhakara, Diana Zhang, Osman Yağan, Swarun Kumar

{"title":"A community-driven approach to democratize access to satellite ground stations","authors":"Vaibhav Singh, Akarsh Prabhakara, Diana Zhang, Osman Yağan, Swarun Kumar","doi":"10.1145/3447993.3448630","DOIUrl":"https://doi.org/10.1145/3447993.3448630","url":null,"abstract":"Should you decide to launch a nano-satellite today in Low-Earth Orbit (LEO), the cost of renting ground station communication infrastructure is likely to significantly exceed your launch costs. While space launch costs have lowered significantly with innovative launch vehicles, private players, and smaller payloads, access to ground infrastructure remains a luxury. This is especially true for smaller LEO satellites that are only visible at any location for a few tens of minutes a day and whose signals are extremely weak, necessitating bulky and expensive ground station infrastructure. In this paper, we present a community-driven distributed reception paradigm for LEO satellite signals where signals received on many tiny handheld receivers (not necessarily deployed on rooftops but also indoors) are coherently combined to recover the desired signal. This is made possible by employing new synchronization and receiver orientation techniques that study satellite trajectories and leverage the presence of other ambient signals. We compare our results with a large commercial receiver deployed on a rooftop and show a 8 dB SNR increase both indoors and outdoors using 8 receivers, costing $38 per RF frontend.","PeriodicalId":177431,"journal":{"name":"Proceedings of the 27th Annual International Conference on Mobile Computing and Networking","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132985738","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: 17

Proceedings of the 27th Annual International Conference on Mobile Computing and Networking 第27届移动计算与网络国际年会论文集

Proceedings of the 27th Annual International Conference on Mobile Computing and Networking Pub Date : 2021-08-26 DOI: 10.1145/3447993

引用次数: 0