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Paper Digest: MOBICOM 2014 Highlights

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International Conference on Mobile Computing and Networking (MobiCom) is one of the top conferences on mobile computing and wireless and mobile networking.

To help the community quickly catch up on the work presented in this conference, Paper Digest Team processed all accepted papers, and generated one highlight sentence (typically the main topic) for each paper. Readers are encouraged to read these machine generated highlights / summaries to quickly get the main idea of each paper.

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Paper Digest Team
team@paperdigest.org

TABLE 1: MOBICOM 2014 Papers

Title Authors Highlight
1 From grad school, to startup to acquisition Sanjit Biswas In this talk, Sanjit will recount the history of Meraki, from the Roofnet project at MIT CSAIL, to bootstrapping the business from the sales of their first product, to scaling up to over 500 employees.
2 Tackling societal grand challenges using mobile computing Lakshminarayanan Subramanian, Sanjit Biswas, Gaetano Borriello, Prabal Dutta, Dina Katabi, Randy Katz The panel features five excellent researchers who have had a tremendous impact on the field of mobile computing over the years and whose research work has directly addressed pressing societal problems.
3 Demystifying 60GHz outdoor picocells Yibo Zhu, Zengbin Zhang, Zhinus Marzi, Chris Nelson, Upamanyu Madhow, Ben Y. Zhao, Haitao Zheng In this paper, we explore a dramatically different alternative in the form of 60GHz mmwave picocells with highly directional links.
4 A vehicle-based measurement framework for enhancing whitespace spectrum databases Tan Zhang, Ning Leng, Suman Banerjee In this paper, we show that such databases cause non-negligible wastage of whitespace spectrum.
5 The case for UHF-band MU-MIMO Narendra Anand, Ryan E. Guerra, Edward W. Knightly In this paper we design and implement the first open MU-MIMO Software-Defined Radio (SDR) platform that operates on an order of magnitude frequency range, from 300 MHz to 5.8 GHz.
6 Enhancing reliability to boost the throughput over screen-camera links Anran Wang, Shuai Ma, Chunming Hu, Jinpeng Huai, Chunyi Peng, Guobin Shen Considering the interplay between the transmission speed and reliability towards effective end-to-end communication, in this paper, we aim to boost the throughput over screen-camera links by enhancing the transmission reliability.
7 The future of mobile computing Jeff Gehlhaar In this talk we will explore the new and exciting technologies that Qualcomm Research is working on to advance the frontier in personalized devices and help solve some of these challenges.
8 Full-duplex without strings: enabling full-duplex with half-duplex clients Karthikeyan Sundaresan, Mohammad Khojastepour, Eugene Chai, Sampath Rangarajan We build the theory of applying spatial IA to full-duplex networks in general and present elegant, implementation-friendly constructions for generating IA solutions, by leveraging the structure of interference specific to these networks.
9 Enabling instantaneous feedback with full-duplex backscatter Vincent Liu, Vamsi Talla, Shyamnath Gollakota This paper introduces the first design that enables full-duplex communication on battery-free backscatter devices.
10 Strata: layered coding for scalable visual communication Wenjun Hu, Jingshu Mao, Zihui Huang, Yiqing Xue, Junfeng She, Kaigui Bian, Guobin Shen In this paper, we borrow the notion of hierarchical modulation from traditional RF communication, and design Strata, a layered coding scheme for visual communication.
11 It starts with iGaze: visual attention driven networking with smart glasses Lan Zhang, Xiang-Yang Li, Wenchao Huang, Kebin Liu, Shuwei Zong, Xuesi Jian, Puchun Feng, Taeho Jung, Yunhao Liu In this work, we explore a new networking mechanism with smart glasses, through which users can express their interest and connect to a target simply by a gaze.
12 Wireless barcodes for tagging infrastructure Farnoosh Moshir, Suresh Singh We use a TDoA (Time Difference of Arrival) technique to read the barcodes which provides robustness to wear and tear of the surface.
13 Enabling physical analytics in retail stores using smart glasses Swati Rallapalli, Aishwarya Ganesan, Krishna Chintalapudi, Venkat N. Padmanabhan, Lili Qiu We consider the problem of tracking physical browsing by users in indoor spaces such as retail stores.
14 Some of my simple results Leonard Kleinrock A number of interesting problems that I have addressed over the years which yielded surprisingly simple results will be presented.
15 Enfold: downclocking OFDM in WiFi Feng Lu, Patrick Ling, Geoffrey M. Voelker, Alex C. Snoeren In this work, we dramatically extend the state of the art by showing how to decode non-sparse signals, in particular, OFDM systems at sub-Nyquist rates.
16 Combating inter-cell interference in 802.11ac-based multi-user MIMO networks Hang Yu, Oscar Bejarano, Lin Zhong In this work, we overcome this limitation by letting the APs and clients in interfering cells coordinately cancel the inter-cell interference using their antennas for beamforming.
17 Phaser: enabling phased array signal processing on commodity WiFi access points Jon Gjengset, Jie Xiong, Graeme McPhillips, Kyle Jamieson We present Phaser, a system that solves these intertwined problems to make phased array signal processing truly practical on the many WiFi access points deployed in the real world.
18 BBN: throughput scaling in dense enterprise WLANs with Bind Beamforming and Nulling Wenjie Zhou, Tarun Bansal, Prasun Sinha, Kannan Srinivasan This paper proposes BBN, an interference nulling scheme that leverages the high density of access points to enable multiple mobile devices to transmit simultaneously to multiple access points (APs), all within a single collision domain.
19 Discovering fine-grained RRC state dynamics and performance impacts in cellular networks Sanae Rosen, Haokun Luo, Qi Alfred Chen, Z. Morley Mao, Jie Hui, Aaron Drake, Kevin Lau In this paper, we show that the impact of RRC states on performance is significantly more complex and diverse than found in previous work.
20 A practical traffic management system for integrated LTE-WiFi networks Rajesh Mahindra, Hari Viswanathan, Karthik Sundaresan, Mustafa Y. Arslan, Sampath Rangarajan Motivated by the lack of practical solutions in this space, we design and implement ATOM – an end-to-end system for adaptive traffic offloading for WiFi-LTE deployments.
21 Exploring human mobility with multi-source data at extremely large metropolitan scales Desheng Zhang, Jun Huang, Ye Li, Fan Zhang, Chengzhong Xu, Tian He To address this issue, we propose and implement a novel architecture mPat to explore human mobility using multi-source data.
22 Modeling web quality-of-experience on cellular networks Athula Balachandran, Vaneet Aggarwal, Emir Halepovic, Jeffrey Pang, Srinivasan Seshan, Shobha Venkataraman, He Yan Recent studies have shown that web browsing is one of the most prominent cellular applications.
23 Where are you from?: confusing location distinction using virtual multipath camouflage Song Fang, Yao Liu, Wenbo Shen, Haojin Zhu To defend against this attack, we propose a detection technique that utilizes an auxiliary receiver or antenna to identify these fake channel characteristics.
24 Tagoram: real-time tracking of mobile RFID tags to high precision using COTS devices Lei Yang, Yekui Chen, Xiang-Yang Li, Chaowei Xiao, Mo Li, Yunhao Liu In this work, we present an RFID-based system, Tagoram, for object localization and tracking using COTS RFID tags and readers.
25 Jigsaw: indoor floor plan reconstruction via mobile crowdsensing Ruipeng Gao, Mingmin Zhao, Tao Ye, Fan Ye, Yizhou Wang, Kaigui Bian, Tao Wang, Xiaoming Li In this paper, we propose Jigsaw, a floor plan reconstruction system that leverages crowdsensed data from mobile users.
26 Demo: real-time breath monitoring using wireless signals Fadel Adib, Zachary Kabelac, Hongzi Mao, Dina Katabi, Robert C. Miller Demo: real-time breath monitoring using wireless signals
27 Demo: PhoneLets: offloading the phone off your phone for energy, cost and network load optimization Andrius Aucinas, Jon Crowcroft Demo: PhoneLets: offloading the phone off your phone for energy, cost and network load optimization
28 Demo: mobile opportunistic system for experience sharing (MOSES) in indoor exhibitions Fehmi Ben Abdesslem, Anders Lindgren This paper describes a demo of an experience sharing application for mobile phones built on an ICN platform designed for devices with intermittent connectivity.
29 Demo: tracking user browsing on a demo floor Aishwarya Ganesan, Swati Rallapalli, Krishna Chintalapudi, Venkat Padmanabhan, Lili Qiu Demo: tracking user browsing on a demo floor
30 Demo: an open-source development platform for long-range UHF-connected wifi hotspots Ryan E. Guerra, Narendra Anand, Edward W. Knightly We present a real-time software-defined radio (SDR) platform for prototyping and measuring the performance of broadband UHF radio networks operating over long distances with point-to-multipoint (PTMP) non-line-of-sight (NLOS) networks.
31 Demo: real-time MU-MIMO channel analysis with a custom 802.11 implementation Chris Hunter, Patrick Murphy, Erik Welsh We present a demonstration of the real-time capture and analysis of multi-user MIMO (MU-MIMO) channel state information from commercial Wi-Fi devices.
32 Demo: ShadowMaps, the urban phone tracking system Andrew Irish, Jason Isaacs, Daniel Iland, João Hespanha, Elizabeth Belding, Upamanyu Madhow In our demonstration, we will present the most recent prototype of our urban location improvement technology, called ShadowMaps, which will be shown to accurately track a mobile device in an urban environment, with up to an order of magnitude reduction in GNSS positioning error.
33 Demo: simulating the impact of communication performance on road traffic safety at intersections Stefan Joerer, Bastian Bloessl, Matthaeus Huber, Abbas Jamalipour, Falko Dressler To simulate different intersection approaches, we implemented a simulation model that resembles different kinds of driver behavior and enables crashes at intersections.
34 Demo: co-primary spectrum sharing with inter-operator D2D trial Markku Jokinen, Marko Mäkeläinen, Tuomo Hänninen A co-primary spectrum sharing trial is presented in this paper.
35 Demo: enabling AGILE spectrum adaptation in commercial 802.11 WLAN deployments Stratos Keranidis, Kostas Chounos, Thanasis Korakis, Iordanis Koutsopoulos, Leandros Tassiulas In this work, we present the AGILE Spectrum Adaptation system that is able to dynamically tune the channel central frequency and bandwidth of wireless links in an adaptive to the interference and traffic conditions way.
36 Demo: Luxapose: indoor positioning with mobile phones and visible light Ye-Sheng Kuo, Pat Pannuto, Prabal Dutta We explore the indoor positioning problem with unmodified smartphones and slightly-modified commercial LED luminaires.
37 Demo: a cognitive solution for commercial wireless conferencing system Wei Liu, Eli De Poorter, Pieter Becue, Bart Jooris, Vincent Sercu, Ingrid Moerman, Jeroen Vanhaverbeke, Carl Lylon, John Gesquiere The proposed solution is verified in a large-scale wireless testbed, and the result shows that the link of the conferencing system is indeed more robust against interference when cognitive solution is applied.
38 Demo: OpenAirInterface: an open LTE network in a PC Navid Nikaein, Raymond Knopp, Florian Kaltenberger, Lionel Gauthier, Christian Bonnet, Dominique Nussbaum, Riadh Ghaddab In this work, we present OpenAirInterface (OAI) as a suitably flexible platform towards open LTE ecosystem and playground [1].
39 Demo: TV white space networking capabilities and potential with an embedded & open-API platform George Nychis, Bruce DeBruhl, Haiyun Tang Using the many available channels at the conference location, we will demonstrate some of these capabilities (e.g., ability to penetrate in-door environments), as well as future capabilities (e.g., novel functionality built on the platform).
40 Demo: software defined radio: on a smartphone, as an app! Yongtae Park, JeongGil Ko, Hyogon Kim Demo: software defined radio: on a smartphone, as an app!
41 Demo: rollinglight – universal camera communications for single led Hsin-Mu Tsai, Hao-Min Lin, Hui-Yu Lee Demo: rollinglight – universal camera communications for single led
42 Demo: a robust barcode system for data transmissions over screen-camera links Anran Wang, Shuai Ma, Chunming Hu, Jinpeng Huai, Chunyi Peng, Guobin Shen In this demo, we show that our RDCode prototype system addresses many practical challenges.
43 Demo: high-precision RFID tracking using COTS devies Lei Yang, Yekui Chen, Chen Chen, Xiang-Yang Li, Xuan Ding, Yi Guo, Yunhao Liu We propose Differential Augmented Hologram (DAH) which will facilitate the instant tracking of the mobile RFID tag to a high precision.
44 Demo: visual attention driven networking with smart glasses Lan Zhang, Xiang-Yang Li, Wenchao Huang, Kebin Liu, Shuwei Zong, Xuesi Jian, Puchun Feng, Taeho Jung, Yunhao Liu In this demo, we propose a proof-of-concept networking system for smart glasses, through which users can express their interest and connect to a target simply by a gaze.
45 Demo: instant phone attitude estimation and its applications Pengfei Zhou, Weiming Chan, Shiqi Jiang, Jiajue Ou, Mo Li, Guobin Shen Based on in-depth understanding of the nature of the MEMS gyroscope and other IMU sensors, we propose A3 – an accurate and automatic attitude detector for commodity smartphones.
46 Poster: clock synchronization for distributed wireless protocols at the physical layer Omid Abari, Hariharan Rahul, Dina Katabi In this extended abstract, we address this challenge by addressing the root cause – the different clocks with different frequencies on the different nodes.
47 Poster: geometrical distance distribution for modeling performance metrics in wireless communication networks Fei Tong, Maryam Ahmadi, Jianping Pan, Lei Zheng, Lin Cai Therefore, this paper proposes a novel systematic and unified approach to obtain the GDD between two random nodes associated with arbitrary network geometries.
48 Poster: overheard ACK with token passing: an optimization to 802.11 MAC protocol Shegufta Bakht Ahsan, Nitin Vaidya In this paper, we propose a scheme called Overheard ACK where the explicit ACK frame has been eliminated by using the leverage of packet overhearing.
49 Poster: in-lane communication framework using smartphone’s inertial sensors Abdulla Alasaadi, Tamer Nadeem In this paper, we describe the in-lane communication framework that enables the communication between vehicles on the same lane.
50 Poster: a coarse-fine corner detection approach for two-dimensional barcode decoding Changsheng Chen, Wai Ho Mow In this work, we proposed a coarse-fine corner detection approach for locating the barcode region.
51 Poster: detection of transportation mode based on smartphones for reducing distracted driving Xin Gao, Jie Tian, Guiling Wang In this paper, we design an app on iPhone for reducing the smartphone-related distracted driving, which can run in the background and can lock the smartphone screen with no passwords required when it detects that the user is driving.
52 Poster: Ziria: language for rapid prototyping of wireless PHY Mahanth Gowda, Gordon Stewart, Geoffrey Mainland, Bozidar Radunović, Dimitrios Vytiniotis, Doug Patterson Ziria introduces a novel programming model tailored to wireless physical layer tasks and captures the inherent and important distinction between data and control paths in this domain.
53 Poster — SAfeDJ community: situation-aware in-car music delivery for safe driving Xiping Hu, Jun-qi Deng, Wenyan Hu, Georgios Fotopoulos, Edith C.-H. Ngai, Zhengguo Sheng, Min Liang, Xitong Li, Victor C.M. Leung, Sidney Fels We propose SAfeDJ, a situation-aware in-car music delivery application, which turns people’s trips into pleasant journeys and driving into a safe and enjoyable activity.
54 Poster: a framework for instant mobile web browsing with smart prefetching and caching Huan Huang, Hailong Sun, Guoqing Ma, Xu Wang, Xudong Liu In this work, we design and implement a framework to reduce Web browsing latency for mobile users with a smart prefetching strategy and caching mechanism.
55 Poster: adaptive flow control for wireless serial bus using wi-fi transmission opportunity Woo-Sung Jung, Keun-Woo Lim, Young-Bae Ko To prevent buffer overflow, we propose an adaptive flow control scheme that can select between the various transmission speeds of USB to match with the bandwidth provided by the Wi-Fi layer.
56 Poster: SensingKit: a multi-platform mobile sensing framework for large-scale experiments Kleomenis Katevas, Hamed Haddadi, Laurissa Tokarchuk Motivated by the lack of a universal, multi-platform library, in this paper we present SensingKit, an efficient, open-source, client-server system that supports both iOS and Android mobile devices.
57 Poster: locating RFID tags by rotation Tao Li, Wei Xi, Shaojie Tang, Jinsong Han, Jizhong Zhao, Xiang-Yang Li, Zhi Wang, Zhiping Jiang Some existing works use large numbers of reference tags which involve lots of manpower to deploy them.
58 Poster: HiLight: hiding bits in pixel translucency changes Tianxing Li, Chuankai An, Andrew Campbell, Xia Zhou We present HiLight, a new form of screen-camera communication without the need of any coded images (e.g. barcodes) for off-the-shelf smart devices.
59 Poster: retrofitting computer vision libraries for concurrent support on mobile devices Robert LiKamWa, Eddie Reyes, Lin Zhong Leveraging this observation, we design a split-process architecture to retrofit existing vision libraries to allow applications to transparently share the computational, memory, and energy overhead of vision processing.
60 Poster: AirEye: blind monitor the ISM band using narrowband radio Meng Meng, Kun Tan, Wenjie Wang In this poster, we present a novel spectrum monitor, named AirEye, that monitors a wide spectrum band using only a narrowband radio.
61 Poster: promoting the spatial reuse of millimeter wave networks via software-defined cross-layer design Yong Niu, Yong Li, Depeng Jin In this paper, we propose a software-defined mmWave network architecture, where a centralized controller is introduced by abstracting the cross-layer control functions from the network layer to physical layer.
62 Poster: Are you driving?: non-intrusive driver detection using built-in smartphone sensors Homin Park, DaeHan Ahn, Myounggyu Won, Sang H. Son, Taejoon Park In this work, we address a fundamental problem of distinguishing the driver from passengers using a fusion of embedded sensors (accelerometers, gyroscopes, microphones, and magnetic sensors) in a smart phone.
63 Poster: am i indoor or outdoor? Valentin Radu, Panagiota Katsikouli, Rik Sarkar, Mahesh K. Marina In this work we describe a general method using only the lightweight sensors on a smartphone to detect if a device is indoor or outdoor.
64 Poster: styrofoam: a tightly packed coding scheme for camera-based visible light communication David Ramirez, Robert LiKamWa, Jason Holloway We present Styrofoam, a coding scheme which optimally satisfies the constraints by inserting blank frames into the transmission pattern.
65 Poster: hearing your breathing: fine-grained sleep monitoring using smartphones Yanzhi Ren, Chen Wang, Yingying Chen, Jie Yang This work presents a fine-grained sleep monitoring system which is capable of detecting the breathing rate by leveraging smartphones.
66 Poster: programming software-defined wireless networks Roberto Riggio, Tinku Rasheed, Mahesh K. Marina In this work, we present a set of programming abstractions modeling three fundamental aspects of a wireless networks, namely state management, resource provisioning, and network state collection.
67 Poster: ColPhone: a smartphone is just a piece of the puzzle Ahmed Salem, Tamer Nadeem In this work we propose ColPhone a framework that facilitates collaboration between smartdevices in the vicinity to share their resources providing users hardware upgrade for their devices.
68 Poster: come closer: proximity-based authentication for the internet of things Hossein Shafagh, Anwar Hithnawi This paper presents a proximity-based authentication approach for the Internet of Things (IoT) that works in-band by solely utilizing the wireless communication interface.
69 Poster: cognitive networking in a self-powered wireless sensor network testbed Petros Spachos, Dimitrios Hatzinakos In this work, a Self-Powered Sensor Network (SPSN) testbed is introduced.
70 Poster – SEA-OR: spectrum and energy aware opportunistic routing for self-powered wireless sensor networks Petros Spachos, Dimitrios Hatzinakos In this work, a combination of these two research approaches in a novel routing protocol is presented.
71 Poster: detecting client mobility in WLANs using PHY layer information Li Sun, Souvik Sen, Dimitrios Koutsonikolas Our testbed experiments show that our mobility classification algorithm achieves more than 92% accuracy in a variety of scenarios.
72 Poster: SaveAlert: an efficient and scalable sensor-driven danger detection system Güliz Seray Tuncay, Kirill Varshavskiy, Robin H. Kravets, Klara Nahrstedt Poster: SaveAlert: an efficient and scalable sensor-driven danger detection system
73 Poster: doppler effect based device-free moving object localization Kang Zhao, Dingyi Fang, Xiaojiang Chen, Yuan Zhang, Weike Nie, Tianzhang Xing We implement the system and evaluate the performance on moving person by experiments.
74 Applying the lessons learnt for navigating the future: a conversation with the pioneers Victor Bahl, Leonard Kleinrock, Randy Katz, Imrich Chlamtac Applying the lessons learnt for navigating the future: a conversation with the pioneers
75 Luxapose: indoor positioning with mobile phones and visible light Ye-Sheng Kuo, Pat Pannuto, Ko-Jen Hsiao, Prabal Dutta We explore the indoor positioning problem with unmodified smartphones and slightly-modified commercial LED luminaires.
76 Experiencing and handling the diversity in data density and environmental locality in an indoor positioning service Liqun Li, Guobin Shen, Chunshui Zhao, Thomas Moscibroda, Jyh-Han Lin, Feng Zhao In this paper, through micro-benchmarks, we find that fingerprint-based approaches are preferable in scenarios where a dense database is available; while model-based approaches are the method of choice in the case of sparse data.
77 Travi-Navi: self-deployable indoor navigation system Yuanqing Zheng, Guobin Shen, Liqun Li, Chunshui Zhao, Mo Li, Feng Zhao We present Travi-Navi – a vision-guided navigation system that enables a self-motivated user to easily bootstrap and deploy indoor navigation services, without comprehensive indoor localization systems or even the availability of floor maps.
78 Accurate indoor localization with zero start-up cost Swarun Kumar, Stephanie Gil, Dina Katabi, Daniela Rus We present Ubicarse, an accurate indoor localization system for commodity mobile devices, with no specialized infrastructure or fingerprinting.
79 Magnetic MIMO: how to charge your phone in your pocket Jouya Jadidian, Dina Katabi We design MagMIMO, a new system for wireless charging of cell phones and portable devices.
80 Itus: an implicit authentication framework for android Hassan Khan, Aaron Atwater, Urs Hengartner We present Itus, an IA framework for Android that allows the research community to improve IA schemes incrementally, while allowing app developers to adopt these improvements at their own pace.
81 Caiipa: automated large-scale mobile app testing through contextual fuzzing Chieh-Jan Mike Liang, Nicholas D. Lane, Niels Brouwers, Li Zhang, Börje F. Karlsson, Hao Liu, Yan Liu, Jun Tang, Xiang Shan, Ranveer Chandra, Feng Zhao In this paper we present Caiipa, a cloud service for testing apps over an expanded mobile context space in a scalable way.
82 Rethink energy accounting with cooperative game theory Mian Dong, Tian Lan, Lin Zhong In this work, we argue that energy accounting should be formulated as a cooperative game and that the Shapley value provides the ultimate ground truth for energy accounting policies.
83 BYOzzzz: focusing on the unsolved challenges in mobility, an industry perspective Kit Colbert BYOzzzz: focusing on the unsolved challenges in mobility, an industry perspective
84 Robust network compressive sensing Yi-Chao Chen, Lili Qiu, Yin Zhang, Guangtao Xue, Zhenxian Hu To address these issues, in this paper we develop LENS decomposition, a novel technique to accurately decompose a network matrix into a low-rank matrix, a sparse anomaly matrix, an error matrix, and a small noise matrix.
85 EkhoNet: high speed ultra low-power backscatter for next generation sensors Pengyu Zhang, Pan Hu, Vijay Pasikanti, Deepak Ganesan We present a radically new design that is minimalist, yet efficient, and designed to operate end-to-end at tens of μWs while enabling high-data rate backscatter at rates upwards of many hundreds of Kbps.
86 A case for enhancing dual radio repeater performance through striping, aggregation, and channel sharing Sayandeep Sen, Michael Griepentrog, Jongwon Yoon, Suman Banerjee The work in this paper is a systematic research and engineering effort in exploring the design space of multi-interface wireless repeater systems.
87 Cutting the cord: a robust wireless facilities network for data centers Yibo Zhu, Xia Zhou, Zengbin Zhang, Lin Zhou, Amin Vahdat, Ben Y. Zhao, Haitao Zheng In this paper, we explore the feasibility of building a dedicated wireless facilities network for data centers.
88 We can hear you with Wi-Fi! Guanhua Wang, Yongpan Zou, Zimu Zhou, Kaishun Wu, Lionel M. Ni We present WiHear, which enables Wi-Fi signals to "hear" our talks without deploying any devices.
89 Use it free: instantly knowing your phone attitude Pengfei Zhou, Mo Li, Guobin Shen Based on in-depth understanding of the nature of the MEMS gyroscope and other IMU sensors commonly equipped on smartphones, we propose A3 – an accurate and automatic attitude detector for commodity smartphones.
90 E-eyes: device-free location-oriented activity identification using fine-grained WiFi signatures Yan Wang, Jian Liu, Yingying Chen, Marco Gruteser, Jie Yang, Hongbo Liu This paper presents device-free location-oriented activity identification at home through the use of existing WiFi access points and WiFi devices (e.g., desktops, thermostats, refrigerators, smartTVs, laptops).