{"title":"SkyEyes: adaptive video streaming from UAVs","authors":"Xiaoli Wang, Aakanksha Chowdhery, M. Chiang","doi":"10.1145/2980115.2980119","DOIUrl":"https://doi.org/10.1145/2980115.2980119","url":null,"abstract":"UAVs (unmanned aerial vehicles) equipped with high-end cameras have become increasingly popular among consumers. UAVs have been traditionally considered for applications such as disaster response and surveillance, while emerging applications include live-event broadcasts, precision agriculture, and augmented-reality games. Consumer UAVs today use fixed-bitrate video streaming where users configure the resolution (4K or 1080p). However, applications with real-time streaming that deploy UAVs in the wild will require adaptive video streaming to tackle uncertain wireless link capacities and meet their video quality requirements. This paper is a first step toward the design of adaptive video streaming algorithms that can provide significant gains for UAV streaming. Our system SkyEyes leverages two novel aspects to aid UAV streaming: content-based compression and video rate adaptation based on location sensors and client buffer status. Our system prototype, while far from complete, exhibits promise -- we believe that adaptive video streaming is indeed crucial for real-time UAV applications","PeriodicalId":172085,"journal":{"name":"Proceedings of the 3rd Workshop on Hot Topics in Wireless","volume":"38 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":"125064953","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":"Bringing differential GPS to drones","authors":"Mahanth K. Gowda","doi":"10.1145/2980115.2980122","DOIUrl":"https://doi.org/10.1145/2980115.2980122","url":null,"abstract":"I will discuss the use of multiple GPS receivers on drones for orientation estimation. The core challenge is in accurately computing the relative locations between each receiver pair, and translating these measurements into the drone's 3D orientation. Achieving good orientation accuracy requires the relative GPS distances to be accurate to a few centimeters -- a difficult task given that GPS today is only accurate to around 1-4 meters. Moreover, the accuracy needs to be precise even under sharp drone maneuvers, GPS signal blockage, and sudden bouts of missing data. In this talk, I will discuss the design of SafetyNet, an off-the-shelf GPS-only system that addresses these challenges through a series of techniques, culminating in a novel particle filter framework running over multi-GNSS systems (GPS, GLONASS, and SBAS). Results from real flight tests report median orientation accuracies of 2 degrees even under overcast weather conditions.","PeriodicalId":172085,"journal":{"name":"Proceedings of the 3rd Workshop on Hot Topics in Wireless","volume":"41 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":"117097726","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":"Ultra-wideband and indoor localization","authors":"P. Pannuto","doi":"10.1145/2980115.2980124","DOIUrl":"https://doi.org/10.1145/2980115.2980124","url":null,"abstract":"Indoor localization technology is completing a generational shift, improving from meter to near-centimeter level accuracy, and shifting research priorities from improving accuracy to building scalable, deployable systems. Leading this shift are ultra-wideband (UWB) RF solutions that have demonstrated their potential for very high accuracy indoor localization. This talk will explore how and why UWB technologies have driven many of the recent advancements in wireless localization. It will then explore how non-traditional UWB designs can solve two key upcoming challenges: scaling up in number (to thousands of localized devices) and down in power (to microwatt scale power budgets). Enabling these opportunities requires decoupling localization from data transmission and rethinking how we utilize the UWB channel from the ground up.","PeriodicalId":172085,"journal":{"name":"Proceedings of the 3rd Workshop on Hot Topics in Wireless","volume":"75 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":"126191663","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}
Jelena Marašević, Tingjun Chen, Jin Zhou, Negar Reiskarimian, H. Krishnaswamy, G. Zussman
{"title":"Full-duplex wireless: algorithms and rate improvement bounds for integrated circuit implementations","authors":"Jelena Marašević, Tingjun Chen, Jin Zhou, Negar Reiskarimian, H. Krishnaswamy, G. Zussman","doi":"10.1145/2980115.2980118","DOIUrl":"https://doi.org/10.1145/2980115.2980118","url":null,"abstract":"Full-duplex (FD) communication can substantially improve spectrum efficiency in wireless networks. Designing higher layer algorithms (e.g., for power control and scheduling) tailored for FD requires taking into account the special characteristics of the physical layer. In particular, the characteristics of recently introduced integrated circuit (IC) implementations required for mobile devices pose unique challenges. Thus, we describe some of our recent results in the area of antenna and analog/RF cancellation. Then, we overview our corresponding results regarding rate gains and algorithm design when considering these IC-based FD implementations. Finally, we discuss cross-layered open problems.","PeriodicalId":172085,"journal":{"name":"Proceedings of the 3rd Workshop on Hot Topics in Wireless","volume":"119 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":"123469366","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}
Kun Qian, Chenshu Wu, Zheng Yang, Chaofan Yang, Yunhao Liu
{"title":"Decimeter level passive tracking with wifi","authors":"Kun Qian, Chenshu Wu, Zheng Yang, Chaofan Yang, Yunhao Liu","doi":"10.1145/2980115.2980131","DOIUrl":"https://doi.org/10.1145/2980115.2980131","url":null,"abstract":"Pioneer approaches for WiFi-based sensing usually employ learning-based techniques to seek appropriate statistical features, but do not support precise tracking without prior training. Thus to advance passive sensing, the ability to track fine-grained human mobility information acts as a key enabler. In this paper, we proposed Widar, a WiFi-based tracking system that simultaneously estimates human's moving velocity (both speed and direction) and locations at decimeter level. Instead of applying statistical learning techniques, Widar builds a theoretical model that geometrically quantifies the relationships between CSI dynamics and user's location and velocity. On this basis, we propose novel techniques to identify PLCR components related to human movements from noisy CSIs and then derive a user's locations in addition to velocities. We implement Widar on commercial WiFi devices and validate its performance in real environments. Our results show that Widar achieves decimeter-level accuracy, with a median location error of 24cm given initial positions and 36cm without them and a mean relative velocity error of 11%.","PeriodicalId":172085,"journal":{"name":"Proceedings of the 3rd Workshop on Hot Topics in Wireless","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":"129485241","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 3rd Workshop on Hot Topics in Wireless","authors":"Xinyu Zhang","doi":"10.1145/2980115","DOIUrl":"https://doi.org/10.1145/2980115","url":null,"abstract":"HotWireless'16 has a fantastic program, with high quality papers that cover many emerging wireless topics, including IoT, 5G, backscattering, virtual reality, UAV networking, visible light communication, and high-precision wireless localization.","PeriodicalId":172085,"journal":{"name":"Proceedings of the 3rd Workshop on Hot Topics in Wireless","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":"129446708","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":"Wireless wearables for virtual and augmented reality","authors":"Steven K. Feiner","doi":"10.1145/2980115.2980125","DOIUrl":"https://doi.org/10.1145/2980115.2980125","url":null,"abstract":"Virtual Reality (VR) and Augmented Reality (AR) have been explored by researchers for nearly a half century. Over the past few years, however, VR has experienced a renaissance, as head-worn display developer kits have metamorphosed into early consumer products, all far superior to what most VR researchers previously had available. Meanwhile, AR head-worn display developer kits are being released, even as Pokémon Go has caused public awareness of hand-held AR to skyrocket. What role will wireless computing play in the future of wearable VR and AR systems? I will suggest some of the ways in which future wearable hardware, software, and user interfaces could benefit from wireless technology, and describe some of the performance constraints that wireless systems must meet for this to be possible. For example, in the quest to develop lightweight eyewear, it will be advantageous to move as much technology as possible off the head, to other parts of the body or to the nearby environment. This will demand reliably low latency and high throughput for the asymmetric round trip from head-worn sensors, to off-head processors, back to head-worn displays. Furthermore, when AR eyewear becomes commonplace, so will multi-user AR collaboration, and that means handling intricate interactions between users, both co-located and remote.","PeriodicalId":172085,"journal":{"name":"Proceedings of the 3rd Workshop on Hot Topics in Wireless","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":"132700450","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}
Kihong Park, H. Oubei, W. Alheadary, B. Ooi, Mohamed-Slim Alouini
{"title":"Design and experimental demonstration of mirror-aided non-imaging receiver for indoor MIMO-VLC systems","authors":"Kihong Park, H. Oubei, W. Alheadary, B. Ooi, Mohamed-Slim Alouini","doi":"10.1145/2980115.2980130","DOIUrl":"https://doi.org/10.1145/2980115.2980130","url":null,"abstract":"Visible light communication (VLC) has attracted great attention with the development of the emerging solid-state lighting sources. Multiple-input multiple-output (MIMO) technique is promising to support high data rate VLC thanks to the deployment of multiple lighting sources. However, high channel correlation in indoor MIMO-VLC channels is critical to the performance of indoor MIMO-VLC systems. The advanced non-imaging receivers in recent works reduce the channel correlation by directivity for each photodetector (PD) by interfering the reception of light oriented in the specific direction. Contrary to previous works, we propose in this paper a new mirror-embedded non-imaging receiver which not only blocks the reception of light on one specific direction but also improves the channel gain on the other direction by receiving the light reflected by a double-sided mirror deployed between the PDs. Numerical results and experimental demonstration show that our proposed mirror diversity receiver (MDR) are more beneficial to obtain well-conditioned channel matrices for spatial-multiplexing MIMO-VLC systems supporting high speed data transmission.","PeriodicalId":172085,"journal":{"name":"Proceedings of the 3rd Workshop on Hot Topics in Wireless","volume":"169 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":"128852962","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":"WiHaul: max-min fair wireless backhauling over multi-hop millimetre-wave links","authors":"Ruifu Li, P. Patras","doi":"10.1145/2980115.2980133","DOIUrl":"https://doi.org/10.1145/2980115.2980133","url":null,"abstract":"The mobile networking community is pursuing densification of small cell deployments to address the capacity crisis inherent to the projected exponential increase in mobile data traffic. Connecting massive numbers of access points to the Internet using optical fibre is however both very complex and expensive. In this paper we tackle small cell backhauling wirelessly, building upon recent advances in millimetre-wave technology. We propose a resource allocation algorithm for aggregate data flows traversing such multi-hop backhauls, and specify WiHaul, a light-weight hierarchical scheduling protocol that enforces the computed airtime shares and coordinates multi-hop transmissions effectively. To achieve high throughput performance while ensuring low demand flows are satisfied, we adopt a max-min fair allocation strategy. Results we present show our solution attains max-min fairness through a non-trivial partitioning of the airtime budget available in cliques of sub-flows, which depends on flow demands, their paths, and the capacities of the links traversed.","PeriodicalId":172085,"journal":{"name":"Proceedings of the 3rd Workshop on Hot Topics in Wireless","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":"127523292","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":"xD-track: leveraging multi-dimensional information for passive wi-fi tracking","authors":"Yaxiong Xie, Jie Xiong, Mo Li, K. Jamieson","doi":"10.1145/2980115.2980127","DOIUrl":"https://doi.org/10.1145/2980115.2980127","url":null,"abstract":"We describe the design and implementation of xD-Track, the first practical Wi-Fi based device-free localization system that employs a simultaneous and joint estimation of time-of-flight, angle-of-arrival, angle-of-departure, and Doppler shift to fully characterize the wireless channel between a sender and receiver. Using this full characterization, xD-Track introduces novel methods to measure and isolate the signal path that reflects off a person of interest, allowing it to localize a human with just a single pair of access points, or a single client-access point pair. Searching the multiple dimensions to accomplish the above is highly computationally burdensome, so xD-Track introduces novel methods to prune computational requirements, making our approach suitable for real-time person tracking. We implement xD-Track on the WARP software-defined radio platform and evaluate in a cluttered office environment. Experiments tracking people moving indoors demonstrate a 230% angle-of-arrival accuracy improvement and a 98% end-to-end tracking accuracy improvement over the state of the art localization scheme SpotFi, adapted for device-free localization. The general platform we propose can be easily extended for other applications including gesture recognition and Wi-Fi imaging to significantly improve performance.","PeriodicalId":172085,"journal":{"name":"Proceedings of the 3rd Workshop on Hot Topics in Wireless","volume":"15 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":"114968895","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}