Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization最新文献_第2页

A framework for remote automation, configuration, and monitoring of real-world experiments 一个用于远程自动化、配置和监控现实世界实验的框架

Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization Pub Date : 2014-09-07 DOI: 10.1145/2643230.2643236

Ismet Aktas, Oscar Puñal, F. Schmidt, Tobias Druner, Klaus Wehrle

引用次数: 3

Towards a characterization of white spaces databases errors: an empirical study 对空白数据库错误特征的实证研究

Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization Pub Date : 2014-09-07 DOI: 10.1145/2643230.2643234

Ahmed Saeed, Khaled A. Harras, M. Youssef

{"title":"Towards a characterization of white spaces databases errors: an empirical study","authors":"Ahmed Saeed, Khaled A. Harras, M. Youssef","doi":"10.1145/2643230.2643234","DOIUrl":"https://doi.org/10.1145/2643230.2643234","url":null,"abstract":"Spectrum regulators consider geo-location databases as the most reliable source of spectrum information for White Space Devices (WSDs). Geo-location databases protect TV band incumbents by keeping track of TV transmitters, and their protected service areas based on their location, transmission parameters, and sophisticated propagation models. However, propagation models inaccuracies can cause an overestimation of the protected area of TV transmitters leading to the inefficient usage of white spaces. In this paper, we present a large scale study, spanning an area of around 3000 km^2 over a driving path of around 190 km, showing that one of the most accurate propagation models, the Irregular Terrain Model (IMT), overestimates the signal power by up to 97% of the time. Based on this study, we provide a characterization of spectrum sensory readings that can be used to amend the prediction of propagation models. This characterization allows spectrum sensors to detect the absence of white spaces with a fairly high threshold of -84 dbm, which enables low cost and accurate spectrum sensing. Furthermore, we present the initial design of SPOC, a system that combines spectrum sensing and propagation modeling in order to better detect white spaces.","PeriodicalId":239177,"journal":{"name":"Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128235689","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: 11

Implementation of a protocol for cooperative packet recovery over hybrid networks 混合网络协作包恢复协议的实现

Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization Pub Date : 2013-09-30 DOI: 10.1145/2505469.2505479

Fraida Fund, T. Korakis, S. Panwar

引用次数: 2

Enabling cognitive-radio paradigm on commercial off-the-shelf 802.11 hardware 在商用现成的802.11硬件上启用认知无线电范式

Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization Pub Date : 2013-09-30 DOI: 10.1145/2505469.2506493

F. Gringoli, N. Facchi, P. Gallo, D. Garlisi, Fabrizio Giuliano, G. Bianchi

{"title":"Enabling cognitive-radio paradigm on commercial off-the-shelf 802.11 hardware","authors":"F. Gringoli, N. Facchi, P. Gallo, D. Garlisi, Fabrizio Giuliano, G. Bianchi","doi":"10.1145/2505469.2506493","DOIUrl":"https://doi.org/10.1145/2505469.2506493","url":null,"abstract":"Cognitive Radio paradigm (CR) is recognized as key enabler for next generation wireless networking: accessing the limited radio spectrum in an opportunistic manner allows secondary users to boost their transmission performance without interfering with existing primary networks. Full testing and experimenting with this paradigm, however, is still a tough task, given either the i) limited capabilities above the PHY layer of cheap SDR solutions, or the ii) heavy investment required for setting up multi-node testbeds powered by FPGAs. In this demo we show how we leveraged our Wireless MAC Processor architecture to tackle the two issues at the same time, providing a highly reconfigurable cognitive solution for wireless local area networks on top of commercial off-the-shelf (COTS) 802.11 devices. We demonstrate a typical CR use case where local and network-wide cognitive loops interact for configuring secondary users real time channel switching in reaction to channel state mutation. We also prove the flexibility of our Wireless MAC Processor (WMP) architecture for extensive testing of the CR paradigm.","PeriodicalId":239177,"journal":{"name":"Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127474497","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: 1

Evaluating perceptual video quality for mobile clients in 802.11n WLAN 802.11n无线局域网中移动客户端感知视频质量评估

Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization Pub Date : 2013-09-30 DOI: 10.1145/2505469.2505476

Victor Omwando, A. Pande, Yunze Zeng, P. Mohapatra

引用次数: 2

Using IF-scale delays to emulate the effects of site-specific multipath in a digital wireless channel emulator 在数字无线信道模拟器中，使用if尺度延迟来模拟特定站点多路径的效果

Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization Pub Date : 2013-09-30 DOI: 10.1145/2505469.2505474

Jason Matusiak, Richard Graham, Keith Taylor, E. Anderson, B. Walker

引用次数: 2

Online energy consumption monitoring of wireless testbed infrastructure through the NITOS EMF framework 通过NITOS EMF框架对无线试验台基础设施进行在线能耗监测

Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization Pub Date : 2013-09-30 DOI: 10.1145/2505469.2505478

Stratos Keranidis, Giannis Kazdaridis, Virgilios Passas, T. Korakis, I. Koutsopoulos, L. Tassiulas

{"title":"Online energy consumption monitoring of wireless testbed infrastructure through the NITOS EMF framework","authors":"Stratos Keranidis, Giannis Kazdaridis, Virgilios Passas, T. Korakis, I. Koutsopoulos, L. Tassiulas","doi":"10.1145/2505469.2505478","DOIUrl":"https://doi.org/10.1145/2505469.2505478","url":null,"abstract":"Development of energy-efficient protocols and algorithms requires in-depth understanding of the power consumption characteristics of real world devices. To this aim, energy efficiency analysis is performed by the research community, mainly focusing on the development of power consumption models. However, recent studies [1] have highlighted the inability of existing models to accurately estimate energy consumption even in non-composite scenarios, where the operation of a single device is analyzed. The inability of such models is further highlighted under real life scenarios, where the impact induced by the simultaneous operation of several devices renders the application of traditional models completely inappropriate. As a result, energy efficiency evaluation under complex configurations and topologies, needs to be experimentally investigated through the application of online monitoring solutions. In this work, we propose the innovative NITOS Energy consumption Monitoring Framework (EMF) able to support online monitoring of energy expenditure, along with the experiment execution. The developed framework is built on a distributed network of low-cost, but highly accurate devices and is fully integrated with the large-scale wireless NITOS testbed. Framework evaluation is performed under both low-level experiments that demonstrate the platform's high-level accuracy, as well as through high-level experiments that showcase how online and distributed monitoring can facilitate energy performance assessment of realistic testbed experiments.","PeriodicalId":239177,"journal":{"name":"Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116605052","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: 24

MASERATI: mobile adaptive streaming based on environmental and contextual information 玛莎拉蒂:基于环境和上下文信息的移动自适应流媒体

Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization Pub Date : 2013-09-30 DOI: 10.1145/2505469.2505473

Dookyoon Han, Jinyoung Han, Youngbin Im, Myungchul Kwak, T. Kwon, Yanghee Choi

{"title":"MASERATI: mobile adaptive streaming based on environmental and contextual information","authors":"Dookyoon Han, Jinyoung Han, Youngbin Im, Myungchul Kwak, T. Kwon, Yanghee Choi","doi":"10.1145/2505469.2505473","DOIUrl":"https://doi.org/10.1145/2505469.2505473","url":null,"abstract":"Wireless/mobile video streaming has become increasingly popular, which makes wireless link bandwidth scarce. To provide streaming services to mobile users, it is crucial to adapt to the link condition and traffic fluctuation. We investigate which factors in natural environments and user contexts affect the available link bandwidth. To this end, we conduct a measurement study which contains 38 repeated trips along the same 5~km circular road in the campus of Seoul National University in April and May 2013. We measure the download throughput of video streaming from two different networks (3G and 4G LTE) with varying location, time, humidity, and speed. Our measurement results reveal that the humidity and location are the more important factors in the 3G network, while the speed, time, and location are the more important ones in the 4G LTE network to predict the available link bandwidth. We then propose an adaptive video streaming framework, MASERATI, where the information of environments and contexts is used to predict the available bandwidth. We demonstrate that MASERATI significantly improves the QoE of mobile streaming users in terms of the playout success rate, video quality, and stability, in comparison to DASH.","PeriodicalId":239177,"journal":{"name":"Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117160901","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

Power-boosting residential wired broadband 电力提升住宅有线宽带

Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization Pub Date : 2013-09-30 DOI: 10.1145/2505469.2506496

Claudio Rossi, Y. Grunenberger, K. Papagiannaki

引用次数: 0

Characterizing WiFi connection and its impact on mobile users: practical insights 表征WiFi连接及其对移动用户的影响:实用见解

Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization Pub Date : 2013-09-30 DOI: 10.1145/2505469.2505480

Suranga Seneviratne, A. Seneviratne, P. Mohapatra, Pierre-Ugo Tournoux

{"title":"Characterizing WiFi connection and its impact on mobile users: practical insights","authors":"Suranga Seneviratne, A. Seneviratne, P. Mohapatra, Pierre-Ugo Tournoux","doi":"10.1145/2505469.2505480","DOIUrl":"https://doi.org/10.1145/2505469.2505480","url":null,"abstract":"Smartphones and WiFi networks are becoming pervasive. As a result, new applications and services are being offered to smartphone users through WiFi networks. Some of the more novel applications provide data services to pedestrians as they move through WiFi coverage areas in public loca- tions such as railway stations. One significant factor that will influence the data transfers for users when they are on the move, is the connection set-up time. In this paper we characterize the WiFi connection set-up process. Using data from voluntary Android smartphone users, we show that WiFi connection setup have significant delays, sometimes as high as 10s. Then through a detailed analysis of the con- nection set-up process we show that, contrary to previous findings, this is due to losses of DHCP messages at the WiFi access point. We also show that some of the methods that have been adopted by device manufactures are suboptimal and this can be addressed at the WiFi access point. Finally using this insight we extend a known mathematical model, which will help in the dimensioning of WiFi networks for pedestrian smartphone users.","PeriodicalId":239177,"journal":{"name":"Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130552415","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