GetMobile Mob. Comput. Commun.最新文献

{"title":"Bringing Home Baby","authors":"Iqbal Mohomed","doi":"10.1145/3103535.3103539","DOIUrl":"https://doi.org/10.1145/3103535.3103539","url":null,"abstract":"Now that mobile phones are a ubiquitous computing medium, we are seeing a stream of connected (and sometimes intelligent) devices. It's interesting to consider whether these so-called \"smart\" devices can help new parents and caregivers of young children. In this article, some problem areas that might be quite simple are considered -- except that the technology solution must be both childproof and accurate enough to entrust the health and safety of your precious cherub. AT CES 2017, a slew of products were introduced that attempted to do exactly that, to help reassure parents in some way.","PeriodicalId":213775,"journal":{"name":"GetMobile Mob. Comput. Commun.","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132272266","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":"MIMO Technologies IN 5G NEW RADIO","authors":"G. Yue, Lingjia Liu, Yongxing Zhou, Jianzhong Zhang","doi":"10.1145/3103535.3103543","DOIUrl":"https://doi.org/10.1145/3103535.3103543","url":null,"abstract":"ports have been specifi ed to support the transmission of up-to 8 data layers in single user (SU) MIMO [3, 4]. Th e multiuser (MU) MIMO has also been supported dynamically with SU-MIMO over frequency domain in LTE release-10 with limited number of data layers or streams. Recently, MIMO with a large number of transmit antennas at the base station, a.k.a. massive MIMO, is introduced, which signifi cantly increases system throughput via MU-MIMO transmissions given a large number of degrees of freedom (DoF) at the transmit side [10]. Practically, considering the form factor limitation at the base station, 3D massive-MIMO systems employing a two dimensional 2D antenna array exploits the DoF at both the elevation domain and the azimuth domain. Th e 3D massive MIMO is considered as full-dimensional MIMO (FD-MIMO) in 3GPP LTE-Advanced systems. [13] With the attractive performance gain from massive MIMO, MIMO continues drawing great interest and attention in the standardization discussions for the next generation, i.e., the 5G cellular systems [1].2 On the other hand, the high frequency millimeter wave (mmWave) will be considered as the carrier in 5G new radio to provide Giga bit-per-second (bps) data transmission rates due to large bandwidth available in this frequency regime. For mmWave with a high carrier frequency, the signal experiences a much larger path loss than that of low carrier frequency of several Giga-Hertz (GHz) or less. However, in mmWave communication, it is feasible In this article, we review the multiantenna, or multiple-input multipleoutput (MIMO) technologies for the fi ft h generation (5G) cellular systems. MIMO has been adopted in the fourth generation (4G) long term evolution (LTE) cellular systems to improve the throughput and reliability. Recently, with a large scale transmit antenna array, or so called massive MIMO, the cell throughput and reliability can be further enhanced for both low frequency sub-6GHz and high frequency millimeter wave (mmWave) transmissions. Th erefore, MIMO still plays an important role in the next-generation cellular systems for a wide range of carrier frequency. Th e 3rd generation partnership project (3GPP) has initiated standardization activities for MIMO technologies in 5G new radio. In this paper, we review the MIMO-related items that have been considered in 3GPP RAN1 group focusing on the physical layer specifi cation.1 The next generation, or the fi ft h generation (5G), cellular network will provide much higher peak data rate, larger data volume per unit area, lower latency, larger number of connected devices, higher mobility, higher reliability, and better energy effi ciency than current 4G LTE systems [1]. One of the key enabling techniques is the multi-antenna or MIMO technology. MIMO technologies have played a vital role in the 4G LTE systems [8]. With multiple transmit and receive antennas, the diverse channel among diff erent transceiver antennas can be exploited to provide the spatial mult","PeriodicalId":213775,"journal":{"name":"GetMobile Mob. Comput. Commun.","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114808442","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":"uLink: user-defined deep links in mobile apps","authors":"Tanzirul Azim, Oriana Riva, Suman Nath","doi":"10.1145/3081016.3081028","DOIUrl":"https://doi.org/10.1145/3081016.3081028","url":null,"abstract":"Web deep links are instrumental to many fundamental user experiences, such as navigating from one web page to another, bookmarking a page, or sharing it with others. Such experiences are not possible with individual pages inside mobile apps, since historically mobile apps did not have links equivalent to web deep links. Mobile deep links, introduced in recent years, still lack many important properties of web deep links. Unlike web links, mobile deep links need significant developer effort to be exposed, cover a small number of predefined pages, and are defined statically to navigate to a page for a given link, but not to dynamically generate a link for a given page. We have built uLink, a novel deep linking mechanism that addresses these problems. uLink is implemented as an application library, which transparently tracks data- and UI-event-dependencies of app pages, and encodes the information in links to the pages; when a link is invoked, the information is utilized to recreate the target page quickly and accurately. uLink also employs techniques, based on static and dynamic analysis of the app, that can provide feedback to users about whether a link may break in the future due to, e.g., modifications of external resources such as a file the link depends on. We have implemented uLink on Android, and tested with 30+ apps. Compared to existing mobile deep links, uLink requires minimal developer effort, achieves significantly higher coverage, and can provide accurate user feedback on a broken link.","PeriodicalId":213775,"journal":{"name":"GetMobile Mob. Comput. Commun.","volume":"808 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128503711","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":"Mobile Systems Research with Drones","authors":"L. Mottola, K. Whitehouse","doi":"10.1145/3081016.3081024","DOIUrl":"https://doi.org/10.1145/3081016.3081024","url":null,"abstract":"Robot vehicle platforms, often called \"drones,\" offer exciting new opportunities for mobile computing. While many systems respond to device mobility (such as smartphones), drones allow computer systems to actively control device location, allowing them to interact with the physical world in new ways and with newfound scale, efficiency, or precision.","PeriodicalId":213775,"journal":{"name":"GetMobile Mob. Comput. Commun.","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128232795","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":"10 Years of Networking Networking Women","authors":"K. Jaffrès-Runser, Sami Rollins, T. Camp, W. Heinzelman","doi":"10.1145/3081016.3081022","DOIUrl":"https://doi.org/10.1145/3081016.3081022","url":null,"abstract":"Networking Networking Women (N2Women) celebrated its 10-year anniversary at the fifth N2Women Workshop co-located with MobiCom 2016. Founded in 2006 by Tracy Camp and Wendi Heinzelman, N2Women is a discipline-specific community for researchers in the communications and networking field. The main goal of N2Women is to foster connections among the underrepresented women in computer networking and related research fields. N2Women allows women to connect with other women who share the same research interests, who attend the same conferences, who face the same career hurdles, and who share common career objectives.","PeriodicalId":213775,"journal":{"name":"GetMobile Mob. Comput. Commun.","volume":"16 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131653761","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 Studies: When and how to conduct them when conducting user studies","authors":"K. Truong","doi":"10.1145/3081016.3081020","DOIUrl":"https://doi.org/10.1145/3081016.3081020","url":null,"abstract":"Evaluating an interactive system with users can be costly and timeconsuming. As a result, it can be extremely frustrating for evaluators whenever they are not able to use any of the data collected from the user evaluation of a system because of problems with how the study was designed or executed. In such instances, evaluators must learn from their mistakes and rerun the study a second time. However, the time, effort, and resources that went into completing the study the first time is still wasted. This problem can be minimized by first conducting a pilot study -- a small-scale version of the actual study -- prior to the final study, to identify, remove, and avoid any potential problems.","PeriodicalId":213775,"journal":{"name":"GetMobile Mob. Comput. Commun.","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131924712","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":"Datasets for Mobile, Wearable and IOT Research","authors":"Reza Rawassizadeh, D. Kotz","doi":"10.1145/3081016.3081018","DOIUrl":"https://doi.org/10.1145/3081016.3081018","url":null,"abstract":"The advent of affordable devices with sensors and communication capabilities has led to the proliferation of computing paradigms, such as the Internet of Things (IoT), mobile devices, and wearable technologies. For the sake of simplicity, we use the umbrella term \"small devices\" for these technologies. At the same time, in the past decade, the increasing availability of large datasets has shifted scientists' attention toward data science, and defined new trends in computation. Even some scientists call it an evolutionary shift that has changed the pace of scientific progress, i.e., the \"fourth paradigm\" [1].","PeriodicalId":213775,"journal":{"name":"GetMobile Mob. Comput. Commun.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129909449","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":"FlashBack: Immersive Virtual Reality on Mobile Devices via Rendering Memoization","authors":"Kevin Boos, David Chu, Eduardo Cuervo","doi":"10.1145/3081016.3081026","DOIUrl":"https://doi.org/10.1145/3081016.3081026","url":null,"abstract":"Driven by recent advances in the mobile computing hardware ecosystem, wearable Virtual Reality (VR) is experiencing a boom in popularity, with many offerings becoming available. Modern VR head-mounted displays (HMDs) fall into two device classes: (i) Tethered HMDs: HMDs tethered to powerful, expensive gaming desktops, such as the Oculus Rift, HTC Vive, and Sony PlayStation VR; (ii) Mobile-rendered HMDs: self-contained, untethered HMDs that run on mobile phones slotted into head mounts, e.g., Google Cardboard and Samsung Gear VR.","PeriodicalId":213775,"journal":{"name":"GetMobile Mob. Comput. Commun.","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126478565","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":"A SURVEY OF LTE WI-FI COEXISTENCE IN UNLICENSED BANDS","authors":"Xuyu Wang, S. Mao, M. Gong","doi":"10.1145/3036699.3036705","DOIUrl":"https://doi.org/10.1145/3036699.3036705","url":null,"abstract":"With the rapid growth of mobile data, many LTE operators are interested in leveraging unlicensed bands to enhance data rates and user experience. Th is paper investigates the problem of the coexistence of LTE and Wi-Fi in 5 GHz unlicensed bands. We fi rst introduce the current rules for the 5 GHz unlicensed bands and the carrier aggregation technique. We then discuss four deployment scenarios and two LTE-unlicensed (LTE-U) coexistence scenarios. Further, we provide a feature comparison between LTE and Wi-Fi in the PHY/MAC layers, and review the coexistence methods for LTE-U and Wi-Fi without or with the Listen- Before-Talk (LBT) mechanism. Th is paper is concluded by an examination of Wi-Fi link aggregation and in-device coexistence issues.","PeriodicalId":213775,"journal":{"name":"GetMobile Mob. Comput. Commun.","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122898212","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":"THE ANATOMY OF SMARTPHONE UNLOCKING: Why and How Android Users Around the World Lock their Phones","authors":"Nathan Malkin, M. Harbach, A. D. Luca, Serge Egelman","doi":"10.1145/3036699.3036712","DOIUrl":"https://doi.org/10.1145/3036699.3036712","url":null,"abstract":"To prevent unauthorized access to their smartphones, users can enable a \"lock screen,\" which may require entering a PIN or password, drawing a pattern, or providing a biometric. We present the results of two studies that together offer a detailed analysis of the smartphone locking mechanisms currently available to billions of smartphone users worldwide. An online survey (N=8,286), conducted in eight different countries, sheds light on people's reasons for choosing their screen lock method and demonstrates significant crosscultural differences in attitudes towards this subject. In a separate monthlong field study (N=134), we studied how existing lock screen mechanisms provide users with distinct tradeoffs between usability and security, identifying areas where both could be improved.","PeriodicalId":213775,"journal":{"name":"GetMobile Mob. Comput. Commun.","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132186324","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}