Proceedings of the 16th International Workshop on Mobile Computing Systems and Applications最新文献_第2页

CrowdREM: Harnessing the Power of the Mobile Crowd for Flexible Wireless Network Monitoring CrowdREM:利用移动人群的力量进行灵活的无线网络监控

Proceedings of the 16th International Workshop on Mobile Computing Systems and Applications Pub Date : 2015-02-12 DOI: 10.1145/2699343.2699348

Andreas Achtzehn, Janne Riihijärvi, Irving Antonio Barriía Castillo, M. Petrova, P. Mähönen

{"title":"CrowdREM: Harnessing the Power of the Mobile Crowd for Flexible Wireless Network Monitoring","authors":"Andreas Achtzehn, Janne Riihijärvi, Irving Antonio Barriía Castillo, M. Petrova, P. Mähönen","doi":"10.1145/2699343.2699348","DOIUrl":"https://doi.org/10.1145/2699343.2699348","url":null,"abstract":"High-speed mobile broadband connections have opened exciting new opportunities to collect sensor data from thousands or even millions of distributed mobile devices for the purpose of crowdsourced decision making. In this paper, we propose CrowdREM (crowdsourced radio environment mapping), a framework with the specific aim of monitoring and modelling wireless cellular networks. CrowdREM enables operator-independent and highly efficient collection of network performance data along all layers of the communications protocol stack. Such extensive information on network load, spectrum usage, or local coverage can help operators to optimize their networks and service quality and enable improved consumer decision making. In this paper, we introduce the mbox{CrowdREM} mobile architecture and show first results from a prototype implementation on open-source mobile phones. We demonstrate the versatility of using commodity devices for network and spectrum monitoring, and present the challenges originating from the use of uncalibrated and low-precision measurement equipment. We have acquired an extensive data set from using our prototype implementation in a 21-day measurement campaign covering more than 1,000 hours of measurement data. From this we present and discuss the potential derivation of tangible and relevant network performance and signal quality indicators, which could, e.g., be conducted by independent parties.","PeriodicalId":252231,"journal":{"name":"Proceedings of the 16th International Workshop on Mobile Computing Systems and Applications","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133541491","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

Can Accurate Predictions Improve Video Streaming in Cellular Networks? 准确的预测能改善蜂窝网络中的视频流吗?

Proceedings of the 16th International Workshop on Mobile Computing Systems and Applications Pub Date : 2015-02-12 DOI: 10.1145/2699343.2699359

X. Zou, Jeffrey Erman, V. Gopalakrishnan, Emir Halepovic, R. Jana, Xin Jin, J. Rexford, R. Sinha

引用次数: 154

Energy-Efficiency Comparison of Mobile Platforms and Applications: A Quantitative Approach 移动平台和应用的能源效率比较:一种定量方法

Proceedings of the 16th International Workshop on Mobile Computing Systems and Applications Pub Date : 2015-02-12 DOI: 10.1145/2699343.2699358

Grace Metri, Weisong Shi, M. Brockmeyer

引用次数: 10

Memory Stones: An Intuitive Information Transfer Technique between Multi-touch Computers 记忆石:多点触控计算机间的直观信息传递技术

Proceedings of the 16th International Workshop on Mobile Computing Systems and Applications Pub Date : 2015-02-12 DOI: 10.1145/2699343.2699352

Kaori Ikematsu, I. Siio

{"title":"Memory Stones: An Intuitive Information Transfer Technique between Multi-touch Computers","authors":"Kaori Ikematsu, I. Siio","doi":"10.1145/2699343.2699352","DOIUrl":"https://doi.org/10.1145/2699343.2699352","url":null,"abstract":"Owners of multiple personal computing devices, such as mobile phones, tablet PCs, laptops, or desktop PCs, may frequently want to transfer information from one device to another.Whereas a drag-and-drop function on the same computing device is easy to achieve, it becomes cumbersome in an environment with multiple computing devices. We have to first locate and then select the target device from a list of devices on a network, even when the device is right in front of us. In this paper, a novel direct manipulation technique for executing drag-and-drop operations between multi-touch devices is proposed.Under our interface concept, dubbed \"Memory Stones,\" a user can \"pick up\" a data object displayed on one device screen, \"carry\" it to another device screen, and \"put it down\" on that device using only their fingers.During this drag-and-drop operation, the user is invited to pantomime the act of carrying a tangible object (a \"stone\") while keeping their fingertip positions unchanged. The system identifies both the source and target devices by matching the shape of the polygon formed by the fingertips when touching each respective screen. We have developed a prototype system for small-to-large sized multi-touch computers including smartphones, tablet PCs, laptops, and desktop PCs, and have carried out a preliminary evaluation of its feasibility.","PeriodicalId":252231,"journal":{"name":"Proceedings of the 16th International Workshop on Mobile Computing Systems and Applications","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128618117","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: 10

60GHz Mobile Imaging Radar 60GHz移动成像雷达

Proceedings of the 16th International Workshop on Mobile Computing Systems and Applications Pub Date : 2015-02-12 DOI: 10.1145/2699343.2699363

Yibo Zhu, Yanzi Zhu, Zengbin Zhang, Ben Y. Zhao, Haitao Zheng

{"title":"60GHz Mobile Imaging Radar","authors":"Yibo Zhu, Yanzi Zhu, Zengbin Zhang, Ben Y. Zhao, Haitao Zheng","doi":"10.1145/2699343.2699363","DOIUrl":"https://doi.org/10.1145/2699343.2699363","url":null,"abstract":"Mobile computing is undergoing a significant shift. Where traditional mobile networks revolved around users and their movements, new networks often center around autonomous mobile agents. These include semi-autonomous drones on military missions, vacuum robots search for dirt at home, intelligent cars that deliver us to work, and first responder robots that find and rescue victims in disasters. A critical challenge limiting these autonomous devices is the lack of accurate sensing systems, e.g. a mobile imaging system that captures the position, shape and surface material of nearby objects. These devices often require high levels of accuracy, and operate under tight constraints: in low-light conditions or moving at moderate speeds. These constraints dramatically reduce the set of possible solutions, eliminating traditional imaging systems that rely on visible light or specialized hardware. In this paper, we present early results in our efforts to design and evaluate a digital imaging radar system using reflections from 60GHz wireless beams. By using user mobility to emulate a virtual antenna array with large aperture, we build virtual antennas with large aperture and high precision. We describe details of our design, including mechanisms for object detection, object imaging, and controlling precision. Our experiments on a real 60GHz testbed show that we can achieve high precision (~1 cm) imaging with as little user movement as half a meter, as well as added potential for using loss profiles to infer the surface material on detected objects.","PeriodicalId":252231,"journal":{"name":"Proceedings of the 16th International Workshop on Mobile Computing Systems and Applications","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122427402","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: 28

The Case for Operating System Management of User Attention 操作系统用户注意力管理案例

Proceedings of the 16th International Workshop on Mobile Computing Systems and Applications Pub Date : 2015-02-12 DOI: 10.1145/2699343.2699362

Kyungmin Lee, J. Flinn, Brian D. Noble

引用次数: 17

The Case for Offload Shaping 卸载整形的案例

Proceedings of the 16th International Workshop on Mobile Computing Systems and Applications Pub Date : 2015-02-12 DOI: 10.1145/2699343.2699351

Wenlu Hu, Brandon Amos, Zhuo Chen, Kiryong Ha, Wolfgang Richter, P. Pillai, Benjamin Gilbert, J. Harkes, M. Satyanarayanan

引用次数: 38

CQIC: Revisiting Cross-Layer Congestion Control for Cellular Networks 蜂窝网络的跨层拥塞控制

Proceedings of the 16th International Workshop on Mobile Computing Systems and Applications Pub Date : 2015-02-12 DOI: 10.1145/2699343.2699345

Feng Lu, Hao Du, Ankur Jain, G. Voelker, A. Snoeren, A. Terzis

{"title":"CQIC: Revisiting Cross-Layer Congestion Control for Cellular Networks","authors":"Feng Lu, Hao Du, Ankur Jain, G. Voelker, A. Snoeren, A. Terzis","doi":"10.1145/2699343.2699345","DOIUrl":"https://doi.org/10.1145/2699343.2699345","url":null,"abstract":"With the advent of high-speed cellular access and the overwhelming popularity of smartphones, a large percent of today's Internet content is being delivered via cellular links. Due to the nature of long-range wireless signal propagation, the capacity of the last hop cellular link can vary by orders of magnitude within a short period of time (e.g., a few seconds). Unfortunately, TCP does not perform well in such fast-changing environments, potentially leading to poor spectrum utilization and high end-to-end packet delay. In this paper we revisit seminal work in cross-layer optimization in the context of 4G cellular networks. Specifically, we leverage the rich physical layer information exchanged between base stations (NodeB) and mobile phones (UE) to predict the capacity of the underlying cellular link, and propose nCQIC, a cross-layer congestion control design. Experiments on real cellular networks confirm that our capacity estimation method is both accurate and precise. A CQIC sender uses these capacity estimates to adjust its packet sending behavior. Our preliminary evaluation reveals that CQIC improves throughput over TCP by 1.08-2.89x for small and medium flows. For large flows, CQIC attains throughput comparable to TCP while reducing the average RTT by 2.38-2.65x.","PeriodicalId":252231,"journal":{"name":"Proceedings of the 16th International Workshop on Mobile Computing Systems and Applications","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121949363","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: 90

Sound Shredding: Privacy Preserved Audio Sensing 声音粉碎:隐私保护音频传感

Proceedings of the 16th International Workshop on Mobile Computing Systems and Applications Pub Date : 2015-02-12 DOI: 10.1145/2699343.2699366

Sumeet Kumar, Le T. Nguyen, Mingzhi Zeng, K. Liu, J. Zhang

{"title":"Sound Shredding: Privacy Preserved Audio Sensing","authors":"Sumeet Kumar, Le T. Nguyen, Mingzhi Zeng, K. Liu, J. Zhang","doi":"10.1145/2699343.2699366","DOIUrl":"https://doi.org/10.1145/2699343.2699366","url":null,"abstract":"Sound provides valuable information about a mobile user's activity and environment. With the increasing large market penetration of smart phones, recording sound from mobile phones' microphones and processing the sound information either on mobile devices or in the cloud opens a window to a large variety of mobile applications that are context-aware and behavior-aware. On the other hand, sound sensing has the potential risk of compromising users' privacy. Security attacks by malicious software running on smart phones can obtain in-band and out-of-band sound information to infer the content of users' conversation. In this paper, we propose two simple yet highly effective methods called {em sound shredding} and {em sound subsampling}. Sound shredding mutates the raw sound frames randomly just like paper shredding and sound subsampling randomly drops sound frames without storing them. The resulting mutated sound recording makes it difficult to recover the text content of the original sound recording, yet we show that some acoustic features are preserved which retains the accuracy of context recognition.","PeriodicalId":252231,"journal":{"name":"Proceedings of the 16th International Workshop on Mobile Computing Systems and Applications","volume":"242 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116046698","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: 15

The Missing Numerator: Toward a Value Measure for Smartphone Apps 缺失的分子:智能手机应用的价值衡量标准

Proceedings of the 16th International Workshop on Mobile Computing Systems and Applications Pub Date : 2015-02-12 DOI: 10.1145/2699343.2699360

Anudipa Maiti, Geoffrey Challen

引用次数: 6