{"title":"Experimental evaluation of multi-path schedulers for LTE/Wi-Fi devices","authors":"Bahar Partov, D. Leith","doi":"10.1145/2980159.2980169","DOIUrl":"https://doi.org/10.1145/2980159.2980169","url":null,"abstract":"To improve network performance, LTE technology is rapidly being rolled out by network operators. At the same time almost all mobile devices also possess a WiFi interface which can potentially be used in tandem with LTE to further improve performance. Motivated by this and by the advantages of link aggregation, there is currently much interest in the transmission of data in parallel over LTE and WiFi. However, the design and evaluation of multi-path schedulers is challenging due to the fact that the path delays experienced in practice are non-stationary and, at present, poorly characterised. To start to address this challenge, in this paper we propose a trace-driven approach for performance evaluation of multi-path schedulers. This approach allows fair, reproducible comparisons that reflect actual performance since they are based on experimental data. We demonstrate the use of this approach to compare the performance of a number of schedulers.","PeriodicalId":433212,"journal":{"name":"Proceedings of the Tenth ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation, and Characterization","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121854690","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}
{"title":"Reproducibility in wireless experimentation: need, challenges, and approaches","authors":"G. Noubir","doi":"10.1145/2980159.2984738","DOIUrl":"https://doi.org/10.1145/2980159.2984738","url":null,"abstract":"Wireless networks are the key enabling technology of the mobile revolution. However, experimental mobile and wireless research is still hindered by the lack of a solid framework to adequately evaluate the performance of a wide variety of techniques and protocols proposed by the community. In this talk, I will motivate the need for experimental reproducibility as a necessary aspect for healthy progress as accepted by other communities. I will illustrate how other research communities went through similar processes. I will then present the unique challenges of mobile and wireless experimentation, and discuss approaches, past, current, and future to address these challenges. Finally, I will discuss how reproducibility extends to mobile and wireless security research.","PeriodicalId":433212,"journal":{"name":"Proceedings of the Tenth ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation, and Characterization","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128780671","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}
{"title":"Pilot deployment of early warning system for landslides in eastern himalayas: poster","authors":"Sangeeth Kumar, P. Rangan, M. Ramesh","doi":"10.1145/2980159.2980177","DOIUrl":"https://doi.org/10.1145/2980159.2980177","url":null,"abstract":"Using wireless networks to connect and communicate between geological sensors is a more scalable and suitable way for designing landslide monitoring and warning system for larger areas spanning many acres. Added to this, if the system has the capability to function in solar power, then it becomes autonomous system with self-organizing and self-healing networks. But high terrain, steep slopes, dense vegetation and lack of light during monsoon season to generate solar power pose serious challenges to develop such an autonomous system with good wireless coverage. This paper is about efforts to design, develop and deploy one such landslide warning system in eastern Himalayas. Pilot deployment is already in place and full deployment is under progress.","PeriodicalId":433212,"journal":{"name":"Proceedings of the Tenth ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation, and Characterization","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133152678","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}
{"title":"Proceedings of the Tenth ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation, and Characterization","authors":"Dimitrios Koutsonikolas, P. Patras","doi":"10.1145/2980159","DOIUrl":"https://doi.org/10.1145/2980159","url":null,"abstract":"This year's program includes a diverse mix of contributions, covering a broad range of topics, such as mmWave networks, LTE/Wi-Fi co-existence, and Internet of Things, while addressing problems related to experimentation platforms, testbed deployment, medium access control performance, and automation of wireless measurements.","PeriodicalId":433212,"journal":{"name":"Proceedings of the Tenth ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation, and Characterization","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121858568","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}
{"title":"LTE/Wi-Fi co-existence under scrutiny: an empirical study","authors":"C. Capretti, F. Gringoli, N. Facchi, P. Patras","doi":"10.1145/2980159.2980164","DOIUrl":"https://doi.org/10.1145/2980159.2980164","url":null,"abstract":"Mobile operators are seeking to increase network capacity by extending Long Term Evolution (LTE) cellular operation into unlicensed frequency bands. While these efforts may respond to the projected exponential growth in mobile data traffic, significant concerns exist about the harmonious coexistence of LTE with incumbent Wi-Fi deployments. In this paper we characterise experimentally the LTE and Wi-Fi behaviour when sharing the same spectrum while operating under a broad range of network conditions. Specifically, we deploy a test bed with commodity Wi-Fi hardware and low-cost software-defined radio equipment running an open-source LTE stack. We investigate the user-level performance attainable over these technologies when employing different settings, including LTE duty cycling patterns, Wi-Fi offered loads, transmit power levels, modulation and coding schemes, and packet sizes. We show that co-existence is feasible without modifications to the Wi-Fi stack, if LTE periodically employs \"silent\" sub-frames; however, optimising the performance of both requires non-trivial tuning of multiple parameters in conjunction with close monitoring of Wi-Fi operation and detection of application-specific requirements. Our findings lay the foundations for coherent design of practical LTE/Wi-Fi co-existence mechanisms.","PeriodicalId":433212,"journal":{"name":"Proceedings of the Tenth ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation, and Characterization","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127044895","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}
Samer S. Hanna, Arsany Guirguis, M. A. Mahdi, Yaser A. El-Nakieb, M. Eldin, Dina M. Saber
{"title":"CRC: collaborative research and teaching testbed for wireless communications and networks","authors":"Samer S. Hanna, Arsany Guirguis, M. A. Mahdi, Yaser A. El-Nakieb, M. Eldin, Dina M. Saber","doi":"10.1145/2980159.2980161","DOIUrl":"https://doi.org/10.1145/2980159.2980161","url":null,"abstract":"The validation of wireless communications research, whether it is focused on PHY, MAC or higher layers, can be done in several ways, each with its limitations. Simulations tend to be simplified. Equipping wireless labs requires funding and time. Remotely accessible testbeds present a good option to validate research. The existing testbeds have gone a long way in building the infrastructure for managing and operating themselves. Yet, there is still space to improve the administration of resources whether it is nodes, frequency spectrum or storage space. In this work, we present the Collaborative Radio Cloud (CRC), a wireless testbed that enables web/remote access to facilitate research experiments in the field of wireless communications and networks. CRC is built upon the contributions made by current testbeds and incorporates new features to improve the user experience and ameliorate the management of resources. It enables multiple simultaneous users to coexist in the testbed by enforcing an elaborate node isolation policy. Software dedicated to the enforcement of spectrum assignment was developed to further ensure the isolation between concurrent users. A tool that is capable of realizing a desired topology using gain control was developed. CRC also operates a scheduler that optimizes node assignment to maximize testbed utilization. Enhancements to disk image saving are being developed to reduce the required storage. Other than research, CRC targets contributing to the education of wireless communications and networks by providing experiments and a web interface dedicated to students and instructors.","PeriodicalId":433212,"journal":{"name":"Proceedings of the Tenth ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation, and Characterization","volume":"236 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132507732","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}
{"title":"Topology realization using gain control for wireless testbeds","authors":"Samer S. Hanna, Karim G. Seddik, A. El-Sherif","doi":"10.1145/2980159.2980160","DOIUrl":"https://doi.org/10.1145/2980159.2980160","url":null,"abstract":"Wireless testbeds present a convenient and cost effective option for researchers in communications to validate their work. The main drawback of these testbeds is their reliance on nodes with fixed placement; this limits experimenters ability to test protocols that depend on a complex connectivity between the nodes such as relaying. In this work, we present a way to over-come this limitation; this method attempts to realize a given topology between a set of nodes by adjusting each node's transmit power and receive gain in a manner to connect and disconnect the links between the nodes as desired. We start by expressing the topology realization as an optimization problem using two different forms. The topology realized is dependent on some characteristics of radio-frequency (RF) hardware. Hence, we evaluate theses parameters for a specific platform. A computer evaluation for the two formulations is carried out, followed by a real world experiment to validate the proposed method. During this experiment, the values of gains required to realize a given topology are calculated, then tested using hardware.","PeriodicalId":433212,"journal":{"name":"Proceedings of the Tenth ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation, and Characterization","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133694959","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}
Sokratis Kartakis, B. D. Choudhary, A. Gluhak, L. Lambrinos, J. Mccann
{"title":"Demystifying low-power wide-area communications for city IoT applications","authors":"Sokratis Kartakis, B. D. Choudhary, A. Gluhak, L. Lambrinos, J. Mccann","doi":"10.1145/2980159.2980162","DOIUrl":"https://doi.org/10.1145/2980159.2980162","url":null,"abstract":"Low Power Wide Area (LPWA) communication technologies have the potential to provide a step change in the enablement of cost-effective and energy efficient Internet of Things (IoT) applications. With an increase in the number of offerings available the real performance of these emerging technologies remain unclear. That is, each technology comes with its own advantages and limitations; yet there is a lack of comparative studies that examine their trade-offs based on empirical evidence. This poses a major challenge to IoT solution architects and developers in selecting an appropriate technology for an envisioned IoT application in a given deployment context. In this paper, we look beyond data sheets and white papers of LPWA communication technologies and provide insights into the performance of three emerging LPWA solutions based on real world experiments with different traffic loads and in different urban deployment contexts. Under the context of this study, specialized hardware was created to incorporate the different technologies and provide scientific quantitative and qualitative information related to data rates, success rates, transmission mode energy and power consumption, and communication ranges. The results of experimentation highlight the practicalities of placing LPWA technologies in real spaces and provide guidelines to IoT solution developers in terms of LPWA technology selection. Overall aim is to facilitate the design of new LPWA technologies and adaptive communication strategies that inform future IoT platforms.","PeriodicalId":433212,"journal":{"name":"Proceedings of the Tenth ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation, and Characterization","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133994944","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}
{"title":"Practical lower layer 60 GHz measurements using commercial off-the-shelf hardware","authors":"Adrian Loch, Guillermo Bielsa, J. Widmer","doi":"10.1145/2980159.2980165","DOIUrl":"https://doi.org/10.1145/2980159.2980165","url":null,"abstract":"Experimenting platforms for wireless 60 GHz networking measurements are limited and extremely costly. The requirements for such a platform in terms of bandwidth and antenna capabilities are very high. For instance, the 802.11ad protocol uses channels with a bandwidth of 2.16 GHz and requires electronically steerable phased antenna arrays. Devices implementing this protocol are available as consumer-grade off-the-shelf hardware but are typically a black box which barely allows any insights for research purposes. In this paper, we show the hidden monitoring capabilities of such a consumer-grade 60 GHz device, and explain how to access lower layer parameters such as modulation and coding schemes, antenna steering, and packet decoding. Moreover, we present an extensive set of experiments showing the behavior of these parameters by means of the aforementioned monitoring capabilities.","PeriodicalId":433212,"journal":{"name":"Proceedings of the Tenth ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation, and Characterization","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124069753","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}
I. Gomez-Miguelez, Andres Garcia-Saavedra, P. Sutton, P. Serrano, C. Cano, D. Leith
{"title":"srsLTE: an open-source platform for LTE evolution and experimentation","authors":"I. Gomez-Miguelez, Andres Garcia-Saavedra, P. Sutton, P. Serrano, C. Cano, D. Leith","doi":"10.1145/2980159.2980163","DOIUrl":"https://doi.org/10.1145/2980159.2980163","url":null,"abstract":"Testbeds are essential for experimental evaluation as well as for product development. In the context of LTE networks, existing testbed platforms are limited either in functionality and/or extensibility or are too complex to modify and customise. In this work we present srsLTE, an open-source platform for LTE experimentation designed for maximum modularity and code reuse and fully compliant with LTE Release 8. We show the potential of the srsLTE library by extending the baseline code to allow LTE transmissions in the unlicensed bands and coexistence with WiFi. We also expand previous results on this emerging research area by showing how different vendor-specific mechanisms in WiFi cards might affect coexistence.","PeriodicalId":433212,"journal":{"name":"Proceedings of the Tenth ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation, and Characterization","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124203538","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}