The emergence of the Internet of Things will cause the density of wirelessly networked devices to increase significantly. As the industry and density continue to grow, enabling and managing networks of these devices in a scalable manner without constant user interaction becomes essential. Noting that information about physical context can guide interactions between devices, we introduce the desktop area network and Ving, a vibratory ping architecture that enables it. Ving is based on the wireless vibratory communications channel between a vibratory motor on one device and an accelerometer on another. Because vibratory communications is a physically-coupled, surface-constrained communications domain, Ving allows devices to bootstrap networks within their physical context, creating a literal desktop area network. Such context establishment and network creation enables a new class of applications for smartphones and embedded devices. We present several of these applications, discuss our preliminary implementation of Ving, compare Ving to alternate methods of context establishment, and suggest potential research challenges stemming from the widespread use of Ving.
{"title":"Ving: Bootstrapping the Desktop Area Network with a Vibratory Ping","authors":"Joshua Adkins, Genevieve Flaspohler, P. Dutta","doi":"10.1145/2799650.2799654","DOIUrl":"https://doi.org/10.1145/2799650.2799654","url":null,"abstract":"The emergence of the Internet of Things will cause the density of wirelessly networked devices to increase significantly. As the industry and density continue to grow, enabling and managing networks of these devices in a scalable manner without constant user interaction becomes essential. Noting that information about physical context can guide interactions between devices, we introduce the desktop area network and Ving, a vibratory ping architecture that enables it. Ving is based on the wireless vibratory communications channel between a vibratory motor on one device and an accelerometer on another. Because vibratory communications is a physically-coupled, surface-constrained communications domain, Ving allows devices to bootstrap networks within their physical context, creating a literal desktop area network. Such context establishment and network creation enables a new class of applications for smartphones and embedded devices. We present several of these applications, discuss our preliminary implementation of Ving, compare Ving to alternate methods of context establishment, and suggest potential research challenges stemming from the widespread use of Ving.","PeriodicalId":275880,"journal":{"name":"Proceedings of the 2nd International Workshop on Hot Topics in Wireless","volume":"319 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115226821","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}
We introduce PolyPoint, the first RF localization system which enables the real-time tracking and navigating of quadrotors through complex indoor environments. PolyPoint leverages the new ScenSor transceiver from DecaWave to acquire the timestamps necessary for accurate time-based location estimation and leverages the benefits of antenna and frequency diversity to iteratively refine a tag's position. PolyPoint produces quadrotor position estimates at a rate of 20 Hz with median error below 40 cm and average error of 56 cm in line-of-sight conditions. PolyPoint approaches the localization accuracy necessary to safely navigate quadrotors indoors, a feat currently achieved by costly and delicate optical motion capture systems.
{"title":"PolyPoint: Guiding Indoor Quadrotors with Ultra-Wideband Localization","authors":"B. Kempke, P. Pannuto, P. Dutta","doi":"10.1145/2799650.2799651","DOIUrl":"https://doi.org/10.1145/2799650.2799651","url":null,"abstract":"We introduce PolyPoint, the first RF localization system which enables the real-time tracking and navigating of quadrotors through complex indoor environments. PolyPoint leverages the new ScenSor transceiver from DecaWave to acquire the timestamps necessary for accurate time-based location estimation and leverages the benefits of antenna and frequency diversity to iteratively refine a tag's position. PolyPoint produces quadrotor position estimates at a rate of 20 Hz with median error below 40 cm and average error of 56 cm in line-of-sight conditions. PolyPoint approaches the localization accuracy necessary to safely navigate quadrotors indoors, a feat currently achieved by costly and delicate optical motion capture systems.","PeriodicalId":275880,"journal":{"name":"Proceedings of the 2nd International Workshop on Hot Topics in Wireless","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120993020","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}
Adjacent channel interference (ACI) in wireless systems is commonly mitigated through the use of guard bands and filters. Guard bands are not used for any transmissions and are therefore wasted spectrum. The use of sharp filters can reduce the size of required guard bands but they are costly and often not present in devices that are already deployed. We focus on OFDM wireless systems, which form the basis for almost all modern wireless networks, and pro- pose a novel technique called ShiftFFT that can be deployed at an OFDM receiver to mitigate ACI from legacy OFDM transmitters. ShiftFFT exploits the presence of over-provisioned cyclic prefixes in most OFDM wireless standards to optimize the starting time of the FFT operation at the receiver, which we show to have significant potential to reduce the amount of guard band required to avoid ACI and thereby enable efficient spectrum use. We evaluate ShiftFFT with a SDR testbed and using simulations across diverse settings, and show that using it can significantly reduce the guard band required by at least 10MHz in most cases while maintaining the same packet error rate performance.
{"title":"ShiftFFT: An Efficient Approach to Mitigate Adjacent Channel Interference in OFDM Systems","authors":"S. Manickam, B. Radunovic, M. Marina","doi":"10.1145/2799650.2799658","DOIUrl":"https://doi.org/10.1145/2799650.2799658","url":null,"abstract":"Adjacent channel interference (ACI) in wireless systems is commonly mitigated through the use of guard bands and filters. Guard bands are not used for any transmissions and are therefore wasted spectrum. The use of sharp filters can reduce the size of required guard bands but they are costly and often not present in devices that are already deployed. We focus on OFDM wireless systems, which form the basis for almost all modern wireless networks, and pro- pose a novel technique called ShiftFFT that can be deployed at an OFDM receiver to mitigate ACI from legacy OFDM transmitters. ShiftFFT exploits the presence of over-provisioned cyclic prefixes in most OFDM wireless standards to optimize the starting time of the FFT operation at the receiver, which we show to have significant potential to reduce the amount of guard band required to avoid ACI and thereby enable efficient spectrum use. We evaluate ShiftFFT with a SDR testbed and using simulations across diverse settings, and show that using it can significantly reduce the guard band required by at least 10MHz in most cases while maintaining the same packet error rate performance.","PeriodicalId":275880,"journal":{"name":"Proceedings of the 2nd International Workshop on Hot Topics in Wireless","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125613632","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}
Jinghao Shi, Liwen Gui, Dimitrios Koutsonikolas, C. Qiao, Geoffrey Challen
Widespread deployment of private home Wifi access points (APs) can result in uncoordinated and overlapping wireless networks that compete with each other for limited bandwidth. We expect this suboptimal arrangement to only get worse, particularly in the dense urban environments that house an increasing fraction of the world's population. Broadband penetration and the demand for high-speed Wifi throughout at home will lead to more private APs, which will generate more interference for neighboring networks, resulting in even more private APs and additional interference, and so on. In this paper we investigate whether we can prevent this vicious cycle by using reciprocal sharing to make better use of existing private home APs. We define reciprocal Wifi sharing as cases where two users both improve their network performance by connecting to each other's overlapping private Wifi networks. Compared to previous approaches that attempted to use private APs to create large-scale open-access Wifi networks, reciprocal Wifi sharing relationships more closely mirror existing human relationships and can be maintained without elaborate reputation mechanisms. To evaluate the potential for reciprocal Wifi sharing, we analyze 21 M Wifi scans collected from 254 smartphones over 5 months. Our results show that even in a sparsely-populated suburban area, reciprocal Wifi sharing can be beneficial. And surprisingly, we detected several reciprocal Wifi sharing opportunities even within our tiny user sample. Motivated by these results, we present the design of WiseFi, a system enabling reciprocal Wifi sharing.
{"title":"A Little Sharing Goes a Long Way: The Case for Reciprocal Wifi Sharing","authors":"Jinghao Shi, Liwen Gui, Dimitrios Koutsonikolas, C. Qiao, Geoffrey Challen","doi":"10.1145/2799650.2799652","DOIUrl":"https://doi.org/10.1145/2799650.2799652","url":null,"abstract":"Widespread deployment of private home Wifi access points (APs) can result in uncoordinated and overlapping wireless networks that compete with each other for limited bandwidth. We expect this suboptimal arrangement to only get worse, particularly in the dense urban environments that house an increasing fraction of the world's population. Broadband penetration and the demand for high-speed Wifi throughout at home will lead to more private APs, which will generate more interference for neighboring networks, resulting in even more private APs and additional interference, and so on. In this paper we investigate whether we can prevent this vicious cycle by using reciprocal sharing to make better use of existing private home APs. We define reciprocal Wifi sharing as cases where two users both improve their network performance by connecting to each other's overlapping private Wifi networks. Compared to previous approaches that attempted to use private APs to create large-scale open-access Wifi networks, reciprocal Wifi sharing relationships more closely mirror existing human relationships and can be maintained without elaborate reputation mechanisms. To evaluate the potential for reciprocal Wifi sharing, we analyze 21 M Wifi scans collected from 254 smartphones over 5 months. Our results show that even in a sparsely-populated suburban area, reciprocal Wifi sharing can be beneficial. And surprisingly, we detected several reciprocal Wifi sharing opportunities even within our tiny user sample. Motivated by these results, we present the design of WiseFi, a system enabling reciprocal Wifi sharing.","PeriodicalId":275880,"journal":{"name":"Proceedings of the 2nd International Workshop on Hot Topics in Wireless","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127195249","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}
Madhurima Pore, Koosha Sadeghi, Vinaya Chakati, Ayan Banerjee, S. Gupta
Commercially available wearable brain sensors and devices that convert smartphones into virtual reality systems open up the potential to implement real time collaborative brain-mobile interactive applications. These applications may derive psychological contexts using electroencephalogram (EEG) collected in a wireless setting, and provide individualized sensory feedback through devices such as Google Cardboard. Psychological contexts are affected not only by user's own behavior but also by her interaction with the environment and possibly other individuals. Hence, deriving psychological context information not only requires sensing of an individual's brain but also data from her neighbors. Further, the data needs to be processed by computationally intensive machine learning algorithms which may not be executed within desired latency using resource limited mobile devices. In such a scenario, real time computation of psychological contexts and administration of sensory feedback may be infeasible. In this work, we consider the idea of offloading psychological context estimation and sensory feedback computation to volunteer mobile devices and study the feasibility of large scale real-time adhoc brain-mobile interface applications. We present the BraiNet architecture, which can be used to write a custom application to perform computation on brain data and gain group level aggregate inferences and provide feedback. Further, heavy computation related to the brain signal processing can be offloaded to networked mobile devices for adhoc real-time execution without the need for a dedicated server. We show the usage of BraiNet to develop "Neuro Movie" (nMovie), that modulates movie frames based on individuals subconscious preferences.
{"title":"Enabling Real-Time Collaborative Brain-Mobile Interactive Applications on Volunteer Mobile Devices","authors":"Madhurima Pore, Koosha Sadeghi, Vinaya Chakati, Ayan Banerjee, S. Gupta","doi":"10.1145/2799650.2799660","DOIUrl":"https://doi.org/10.1145/2799650.2799660","url":null,"abstract":"Commercially available wearable brain sensors and devices that convert smartphones into virtual reality systems open up the potential to implement real time collaborative brain-mobile interactive applications. These applications may derive psychological contexts using electroencephalogram (EEG) collected in a wireless setting, and provide individualized sensory feedback through devices such as Google Cardboard. Psychological contexts are affected not only by user's own behavior but also by her interaction with the environment and possibly other individuals. Hence, deriving psychological context information not only requires sensing of an individual's brain but also data from her neighbors. Further, the data needs to be processed by computationally intensive machine learning algorithms which may not be executed within desired latency using resource limited mobile devices. In such a scenario, real time computation of psychological contexts and administration of sensory feedback may be infeasible. In this work, we consider the idea of offloading psychological context estimation and sensory feedback computation to volunteer mobile devices and study the feasibility of large scale real-time adhoc brain-mobile interface applications. We present the BraiNet architecture, which can be used to write a custom application to perform computation on brain data and gain group level aggregate inferences and provide feedback. Further, heavy computation related to the brain signal processing can be offloaded to networked mobile devices for adhoc real-time execution without the need for a dedicated server. We show the usage of BraiNet to develop \"Neuro Movie\" (nMovie), that modulates movie frames based on individuals subconscious preferences.","PeriodicalId":275880,"journal":{"name":"Proceedings of the 2nd International Workshop on Hot Topics in Wireless","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126124435","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}
In this paper, we present textbf{THINK}, a practical general-purpose brain-computer communication platform that relies on the OpenBCI and OpenViBE hardware and software platforms, and allows for a simple three-alphabet vocabulary. Specifically, we consider the scenario where a subject is wearing a sensor array (an electrode cap), and consciously manipulating her thoughts to communicate wirelessly with an external computing entity (a smartphone) without the aid of any external stimuli. Using textbf{THINK}, we explore general aspects of brain computer communication that are application agnostic. In particular, we study the following questions: (i) what is the accuracy of the system? (ii) how fast can the subject switch thoughts corresponding to symbols; (iii) is there an impact on accuracy with learning time; and (iv) how does accuracy drop with decreasing number of sensors (electrodes)? Using purely experimental analysis, we present some results that provide preliminary answers for these questions.
{"title":"THINK: Toward Practical General-Purpose Brain-Computer Communication","authors":"Mohit Agarwal, Raghupathy Sivakumar","doi":"10.1145/2799650.2799659","DOIUrl":"https://doi.org/10.1145/2799650.2799659","url":null,"abstract":"In this paper, we present textbf{THINK}, a practical general-purpose brain-computer communication platform that relies on the OpenBCI and OpenViBE hardware and software platforms, and allows for a simple three-alphabet vocabulary. Specifically, we consider the scenario where a subject is wearing a sensor array (an electrode cap), and consciously manipulating her thoughts to communicate wirelessly with an external computing entity (a smartphone) without the aid of any external stimuli. Using textbf{THINK}, we explore general aspects of brain computer communication that are application agnostic. In particular, we study the following questions: (i) what is the accuracy of the system? (ii) how fast can the subject switch thoughts corresponding to symbols; (iii) is there an impact on accuracy with learning time; and (iv) how does accuracy drop with decreasing number of sensors (electrodes)? Using purely experimental analysis, we present some results that provide preliminary answers for these questions.","PeriodicalId":275880,"journal":{"name":"Proceedings of the 2nd International Workshop on Hot Topics in Wireless","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114392998","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}
Built around a cost-effective embedded Linux system, OpenVLC1.0 is an open source, flexible, software-defined, and low-cost platform for research in Visible Light Communication (VLC) Networks. OpenVLC1.0 consists of simple electronic hardware for optical transmission and reception, and of software implementation that runs the MAC layer, part of the PHY layer, and offers an interface to Internet protocols. We have designed and developed a printed circuit board (OpenVLC1.0 cape) that implements a flexible optical front-end. Researchers can plug the cape into the main Beaglebone board and swiftly build and prototype innovative PHY and MAC protocols using the software implementation (OpenVLC1.0 driver). In this work, we provide preliminary measurement results that demonstrate the flexibility of the platform in a few but yet representative scenarios.
{"title":"Low-Cost, Flexible and Open Platform for Visible Light Communication Networks","authors":"Qing Wang, D. Giustiniano, O. Gnawali","doi":"10.1145/2799650.2799655","DOIUrl":"https://doi.org/10.1145/2799650.2799655","url":null,"abstract":"Built around a cost-effective embedded Linux system, OpenVLC1.0 is an open source, flexible, software-defined, and low-cost platform for research in Visible Light Communication (VLC) Networks. OpenVLC1.0 consists of simple electronic hardware for optical transmission and reception, and of software implementation that runs the MAC layer, part of the PHY layer, and offers an interface to Internet protocols. We have designed and developed a printed circuit board (OpenVLC1.0 cape) that implements a flexible optical front-end. Researchers can plug the cape into the main Beaglebone board and swiftly build and prototype innovative PHY and MAC protocols using the software implementation (OpenVLC1.0 driver). In this work, we provide preliminary measurement results that demonstrate the flexibility of the platform in a few but yet representative scenarios.","PeriodicalId":275880,"journal":{"name":"Proceedings of the 2nd International Workshop on Hot Topics in Wireless","volume":"290 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114394875","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}
It is our great pleasure to welcome you to the Second ACM Workshop on Hot Topics in Wireless (HotWireless 2015). This year's HotWireless continues from where we left off last year. It has an exciting program focused on disruptive wireless technologies and systems that can enable orders of magnitude improvements in performance and novel wireless applications. HotWireless strives to provide a launching pad for bold and visionary ideas, and to bring together experts in hardware, physical layer, networks, and systems to address core technical challenges in these emerging wireless technologies. This year we received 16 submissions, of which we selected 10 for publication. The program committee consisted of 19 wireless experts from around the world, who did a fantastic job to provide an average of 4 reviews per paper. The accepted papers this year include exciting topics, which range from indoor localization and 3-D mapping, to low level wireless communication, to communication with UAVs using free space optics. In addition to the accepted papers, we will also have invited talks from several wireless experts. We look forward to your active participation in this workshop!
{"title":"Proceedings of the 2nd International Workshop on Hot Topics in Wireless","authors":"Ranveer Chandra, K. Srinivasan","doi":"10.1145/2799650","DOIUrl":"https://doi.org/10.1145/2799650","url":null,"abstract":"It is our great pleasure to welcome you to the Second ACM Workshop on Hot Topics in Wireless (HotWireless 2015). This year's HotWireless continues from where we left off last year. It has an exciting program focused on disruptive wireless technologies and systems that can enable orders of magnitude improvements in performance and novel wireless applications. HotWireless strives to provide a launching pad for bold and visionary ideas, and to bring together experts in hardware, physical layer, networks, and systems to address core technical challenges in these emerging wireless technologies. \u0000 \u0000This year we received 16 submissions, of which we selected 10 for publication. The program committee consisted of 19 wireless experts from around the world, who did a fantastic job to provide an average of 4 reviews per paper. The accepted papers this year include exciting topics, which range from indoor localization and 3-D mapping, to low level wireless communication, to communication with UAVs using free space optics. In addition to the accepted papers, we will also have invited talks from several wireless experts. \u0000 \u0000We look forward to your active participation in this workshop!","PeriodicalId":275880,"journal":{"name":"Proceedings of the 2nd International Workshop on Hot Topics in Wireless","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134466139","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}
Austin M. Anderson, Xiang Wang, K. Baker, D. Grunwald
Historically, spectrum allocations were assigned to a single user by regulation and spectrum interference was relatively easy to identify. Enforcement was simplified by having a small set of known licensees. Spectrum regulation is increasingly moving toward dynamic spectrum access mediated by databases, exclusion zones, sensors and other methods intended to improve spectrum efficiency. To have meaning, these spectrum sharing mechanisms must have some form of enforcement. While the spectrum policy community has consider ex-post (preventative) and ex-ante (punitive) enforcement mechanisms, enforcement will rely on spectrum forensics -- the scientific gathering of information to inform an enforcement action. In this paper, we initiate exploration of a system for spectrum forensics that combines crowd-sourced interference detection, fixed sensors and aerial measurement as well as a system for minimizing the data that needs to be collected. As part of a multi-tiered approach, the highest tier will be enabled by the equivalent of an "SDR in the sky" for self-directed localization and identification of interference sources.
{"title":"Systems For Spectrum Forensics","authors":"Austin M. Anderson, Xiang Wang, K. Baker, D. Grunwald","doi":"10.1145/2799650.2799657","DOIUrl":"https://doi.org/10.1145/2799650.2799657","url":null,"abstract":"Historically, spectrum allocations were assigned to a single user by regulation and spectrum interference was relatively easy to identify. Enforcement was simplified by having a small set of known licensees. Spectrum regulation is increasingly moving toward dynamic spectrum access mediated by databases, exclusion zones, sensors and other methods intended to improve spectrum efficiency. To have meaning, these spectrum sharing mechanisms must have some form of enforcement. While the spectrum policy community has consider ex-post (preventative) and ex-ante (punitive) enforcement mechanisms, enforcement will rely on spectrum forensics -- the scientific gathering of information to inform an enforcement action. In this paper, we initiate exploration of a system for spectrum forensics that combines crowd-sourced interference detection, fixed sensors and aerial measurement as well as a system for minimizing the data that needs to be collected. As part of a multi-tiered approach, the highest tier will be enabled by the equivalent of an \"SDR in the sky\" for self-directed localization and identification of interference sources.","PeriodicalId":275880,"journal":{"name":"Proceedings of the 2nd International Workshop on Hot Topics in Wireless","volume":"141 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123007157","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}
Free-Space-Optical (FSO) communication has the potential to make high data rate point-to-point transfers possible. Despite its capacity advantages, FSO communication (FSOC) requires establishment and maintenance of line-of-sight (LOS) alignment. We consider two Unmanned Aerial Vehicles (UAVs), each with one FSO transceiver mounted on a hemispherical structure/head capable of rotating 360degree~in the horizontal plane and 180 degree in the vertical plane. We propose a novel scheme that deals with the problem of automatic establishment and maintenance of LOS alignment between the UAVs with mechanical steering of the FSO transceivers. The proposed method shows that using such mechanically steerable transceivers and a simple auto-alignment mechanism, it is possible to maintain an optical wireless link between two UAVs with nominal disruption.
{"title":"Autonomous Alignment of Free-Space-Optical Links Between UAVs","authors":"M. Khan, M. Yuksel","doi":"10.1145/2799650.2799656","DOIUrl":"https://doi.org/10.1145/2799650.2799656","url":null,"abstract":"Free-Space-Optical (FSO) communication has the potential to make high data rate point-to-point transfers possible. Despite its capacity advantages, FSO communication (FSOC) requires establishment and maintenance of line-of-sight (LOS) alignment. We consider two Unmanned Aerial Vehicles (UAVs), each with one FSO transceiver mounted on a hemispherical structure/head capable of rotating 360degree~in the horizontal plane and 180 degree in the vertical plane. We propose a novel scheme that deals with the problem of automatic establishment and maintenance of LOS alignment between the UAVs with mechanical steering of the FSO transceivers. The proposed method shows that using such mechanically steerable transceivers and a simple auto-alignment mechanism, it is possible to maintain an optical wireless link between two UAVs with nominal disruption.","PeriodicalId":275880,"journal":{"name":"Proceedings of the 2nd International Workshop on Hot Topics in Wireless","volume":"269 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121924261","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}
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