DOCSLIB.ORG

Seamless Resources Sharing in Wearable Networks by Application Function Virtualization

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Seamless Resources Sharing in Wearable Networks by Application Function Virtualization 1 Seamless Resources Sharing in Wearable Networks by Application Function Virtualization Harini Kolamunna, Kanchana Thilakarathna, Diego Perino, Dwight Makaroff and Aruna Seneviratne Abstract—The prevalence of smart wearable devices is increasing exponentially and we are witnessing a wide variety of fascinating new services that leverage the capabilities of these wearables. Wearables are truly changing the way mobile computing is deployed and mobile applications are being developed. It is possible to leverage the capabilities such as connectivity, processing, and sensing of wearable devices in an adaptive manner for efficient resource usage and information accuracy within the personal area network. We show that application developers are not yet taking advantage of these cross-device capabilities, however, instead using wearables as passive sensors or simple end displays to provide notifications to the user. We thus design AFV (Application Function Virtualization), an architecture enabling automated dynamic function virtualization and scheduling across devices in a personal area network, simplifying the development of the apps that are adaptive to context changes. AFV provides a simple set of APIs hiding complex architectural tasks from app developers whilst continuously monitoring the user, device and network context, to enable the adaptive invocation of functions across devices. We show the feasibility of our design by implementing AFV on Android, and the benefits for the user in terms of resource efficiency, especially in saving energy consumption, and quality of experience with multiple use cases. Index Terms—smart wearable devices; wearable computing; energy utilization; context monitoring; function virtualization. F 1 INTRODUCTION MART wearable devices such as smartphones, tablets, utilize the distributed device resources, managing the cost S smartwatches and fitness bands enable mobile users to of running these functions in each device and communi- form Personal Area Networks (PANs). Some of the devices cation costs explicitly. This requires developers to have a in the PAN are capable of providing the same functionality. wider understanding of distributed systems and increases For instance, a fitness band, a smartwatch and a smartphone the complexity of mobile app development. Therefore, an are each likely to have an accelerometer, a gyroscope, and architecture that takes user and device context into account, a heart rate monitor. Similarly, a number of devices on enabling app developers to utilize all PAN resources easily the PAN may have direct Internet connectivity, providing is needed. multiple network interfaces. Furthermore, some wearable In this paper, we present such an architecture that ex- devices will have sufficient computing resources to perform tends the concept of network function virtualization [2] functions such as data encoding, compression and encryp- to device functions. We show the proposed architecture’s tion, while others may not. advantages to users and application developers and make Previous analysis of several popular wearable health and the following contributions: fitness tracking applications [1] shows that app developers • Provide an architecture (AFV) that enables wear- tend not to leverage available resources on other devices. able/mobile application function virtualization for For examples, the smartwatch pedometer will still use its the development of adaptive wearable/mobile ap- own accelerometer when the battery level is low, despite plications. an accelerometer being available on a fully-charged smart- • Design AFV’s inter-device and intra-device commu- arXiv:1711.08495v1 [cs.OS] 14 Nov 2017 phone. The primary reason for relying on local resources nication protocols to minimize the overhead added only is the app developers reliance on the APIs provided by by the architecture and maximizes the advantages. the target device.1 • Propose and evaluate a greedy heuristic algorithm To harness the collective capabilities of PAN devices, for adaptive function allocation across devices con- developers have to implement each app individually to sidering the available resources and dynamic context of devices in the PAN. • H. Kolamunna, K. Thilakarathna, and A. Seneviratne are with the • Demonstrate AFV’s ability to adapt to context School of EE&T, University of New South Wales and Data61- CSIRO, Eveleigh, NSW 2015, Australia. E-mail: fharini.kolamunna, changes dynamically and demonstrate user and per- kanchana.thilakarathna, [email protected] formance benefits of using AFV using a number of applications, and their usage. • D. Perino is with Telefonica Research. Email: [email protected] The rest of this paper is organized as follows. We first • D. Makaroff is with University of Saskatchewan. E-mail: present the AFV architecture, describing each module of [email protected] AFV followed by the context-aware adaptive function allo- 1. These APIs abstract a large spectrum of functions (e.g., sensing, cation algorithm. Next, we show the realization of AFV with communication) that are actually implemented by the operating sys- tems (OS) or third party libraries and executed in the device where the implementation in Android and the experimental calibra- application is running. tions. Performance evaluation with simulation and experi- 2 ments are presented in details with the experimented use Apps app 1 app 2 app 3 cases of AFV. Finally, we overview related work and com- AFV Apps Architecture Developer plementary systems, and provide conclusions with future OS AFV APIs Func-on API Preference API work. Tier 1 - Device 3 Apps Decision Funcon AFV Engine Manager User Architecture 2 AFV: APPLICATION FUNCTION VIRTUALIZATION OS AFV Architecture AFV Tier 1 - Device 2 Context Funcon Communicaon Manager Monitoring Execuon OS APIs OS Tier 2 - Devices Tier 1 - Device 1 Fig. 2. Overview of the AFV and logical connectivity among devices. state, which we refer to as AFV. In so doing, it is possible to accomplish the goals of a) minimizing the development effort for application developers; b) minimizing the config- uration burden of the users; and c) maximizing the user quality of experience. Fig. 1. An overview of an personal wearable network. 2.1 AFV Architecture AFV is a collaborative platform, which runs on the Tier 1 Current PAN devices can be divided into two broad devices and interacts with the Tier 2 devices in a PAN as categories, which we refer to as Tier 1 and Tier 2, depicted shown in Figure 1, makes available all potential resources in Figure 1. Tier 1 devices, (e.g. smartglasses, smartwatches, to application developers and/or users seamlessly through smartphones), are relatively more resourceful than Tier 2 APIs. devices. Tier 2 devices, (e.g. smartshirts and bio-patches) Figure 2 provides a schematic view of the AFV archi- simply carry out sensing functions. In contrast to Tier 2 tecture. To use AFV, applications register requests for the devices, Tier 1 devices have the following additional fea- required functions via the AFV APIs explained in Section tures: a) availability of heterogeneous long-range network 2.2. Within AFV, application function registration requests connectivity (WiFi, cellular), and b) ability to process sensed are handled by the Function Manager module as described and received information. in Section 2.3. The Context Monitoring module periodically Therefore, Tier 1 devices may be equipped with a rich- monitors device and user context as detailed in Section 2.4. set of sensors, multiple connectivity interfaces, storage and One of the Tier 1 devices on a PAN is elected as the Master computing power to perform wide set of functions such Device. This can either be done by the user or automatically as compression, encoding, rendering, intrusion detection, based on a set of criteria such as the lowest ratio between firewall filtering and encryption. Some of these resources current state of charge and energy usage (i.e., the Tier 1 are context dependent, e.g. WiFi connectivity will only be device that would be least affected by the master tasks). available in limited locations, GPS location will not be The automated Master Device selection is done in the available indoors and devices may be disconnected if the Decision Engine (described in Section 2.5) as a collective battery is depleted. process of all the Tier 1 devices. The Decision Engine of the Since, Tier 2 devices provide complementary and specific selected Master Device then determines the optimal mapping functionality that may be duplicated on available Tier 1 of each application function request to a function provided devices, an application does not usually need sensors on all by a device on the PAN. All the other Tier 1 devices transfer devices to be active simultaneously. It is also the case that context changes to the Master Device to be used by the Deci- different sensors have differing output quality and resource sion Engine. The Communication Manager maintains efficient requirements that make the selection of functionality for Inter-device and Intra-device communication as detailed in optimal user benefit at run-time a challenge. Thus if all the Section 2.6. Finally, the Function Execution module performs resources available on a PAN can be effectively utilized in an function invocation on devices as described in Section 2.7. automated fashion, depending on the user/device context, Figure 3 shows the diagrammatic representation of the flow it should be possible to significantly improve both the di- of
Load more

Recommended publications
  • LG Watch Urbane È Dello Spessore Previsto Dagli Standard Di Qualità Più Elevati
    ITALIANO USER GUIDE LG-W150 MFL69146201 (1.0) www.lg.com Guida per l'utente ITALIANO • Alcuni contenuti e illustrazioni possono differire dal dispositivo a seconda della regione, del provider di servizi, della versione SW o del sistema operativo e sono soggetti a modifica senza preavviso. • Si raccomanda di utilizzare solo accessori opzionali prodotti da LG. Gli elementi forniti sono progettati esclusivamente per questo dispositivo e potrebbe non essere compatibile con altri dispositivi. • Questo dispositivo non è indicato per persone con problemi di vista in quanto integra uno schermo a sfioramento. • Copyright ©2015 LG Electronics, Inc. Tutti i diritti riservati. LG e il logo LG sono marchi di LG Group e delle società affiliate. Tutti gli altri marchi registrati appartengono ai rispettivi proprietari. • Google™, Google Maps™, Gmail™, YouTube™, Hangouts™ e Play Store™ sono marchi registrati di Google, Inc. Sommario Informazioni di sicurezza .........................4 Visualizzare la carica residua della batteria o la data ................................................31 Presentazione dell'orologio ....................15 Spegnere temporaneamente lo schermo Struttura dell'orologio ............................15 con la modalità Teatro............................32 Ricarica dell'orologio .............................17 Potenziare temporaneamente la luminosità Modalità di ricarica ................................20 dello schermo ........................................32 Se lo schermo si blocca .........................20 Accesso al menu
    [Show full text]
  • I in the UNITED STATES DISTRICT COURT for the EASTERN DISTRICT of TEXAS LOGANTREE LP Plaintiff, V. LG ELECTRONICS, INC., and LG
    Case 4:21-cv-00332 Document 1 Filed 04/27/21 Page 1 of 14 PageID #: 1 IN THE UNITED STATES DISTRICT COURT FOR THE EASTERN DISTRICT OF TEXAS LOGANTREE LP Plaintiff, v. CIVIL ACTION NO. LG ELECTRONICS, INC., and LG ELECTRONICS USA, INC., JURY DEMAND Defendants. PLAINTIFF’S ORIGINAL COMPLAINT TABLE OF CONTENTS I. PARTIES ................................................................................................................................ 1 II. JURISDICTION AND VENUE ........................................................................................ 2 III. THE PATENT-IN-SUIT ................................................................................................... 3 IV. THE REEXAMINATION ................................................................................................. 4 V. COUNT ONE: INFRINGEMENT OF THE REEXAMINED ‘576 PATENT ............. 7 VI. PRAYER FOR RELIEF.................................................................................................. 11 VII. DEMAND FOR JURY TRIAL ....................................................................................... 12 i Case 4:21-cv-00332 Document 1 Filed 04/27/21 Page 2 of 14 PageID #: 2 TABLE OF AUTHORITIES Cases TC Heartland LLC v. Kraft Foods Grp. Brands LLC, 137 S. Ct. 1514 (2017) .............................. 3 Statutes 28 U.S.C. § 1331 ............................................................................................................................. 2 28 U.S.C. § 1338 ............................................................................................................................
    [Show full text]
  • TONYPAT... Co,Ltd
    Fév 2018 N°12 Journal mensuel gratuit www.pattaya-journal.com TONYPAT... Co,ltd Depuis 2007 NOUVEAU ! Motorbike à louer YAMAHA avec assurance AÉROX 155CC NMAX - PCX & TOUT MODÈLE Des tarifs pour tous Livraison gratuite à partir les budgets d’une semaine de location Ouverture de 10h à 19h30, 7 jours sur 7 Tony Leroy Tonypat... Réservation par internet 085 288 6719 FR - 038 410 598 Thaï www.motorbike-for-rent.com [email protected] | Soi Bongkoch 3 Potage et Salade Bar Compris avec tous les plats - Tous les jours : Moules Frites 269฿ • Air climatisé - Internet • TV Led 32” Cablée ifféren d te • Réfrigérateur 0 s • Coffre-fort 2 b i s èr e es belg Chang RESTAURANT - BAR - GUESTHOUSE Pression Cuisine Thaïe Cuisine Internationale 352/555-557 Moo 12 Phratamnak Rd. Soi 4 Pattaya Tel : 038 250508 email: [email protected] www.lotusbar-pattaya.com Pizzas EDITO LA FÊTE DES AMOUREUX Le petit ange Cupidon armé d’un arc, un carquois et une fleur est de retour ce mois-ci. Il va décocher ses flèches d’argent en pagaille et faire encore des victimes de l’amour. Oui car selon la mythologie, quiconque est touché par les flèches de Cupidon tombe amoureux de la personne qu’il voit à ce moment-là. Moi par exemple... Je m’baladais sur l’avenue, le cœur ouvert à l’inconnu, j’avais envie de dire bonjour à n’importe qui, n’importe qui et ce fut toi, je t’ai dit n’importe quoi, il suffisait de te parler, pour t’apprivoiser..
    [Show full text]
  • Characterizing Smartwatch Usage in the Wild
    Characterizing Smartwatch Usage In The Wild Xing Liu1 Tianyu Chen1 Feng Qian1 Zhixiu Guo23 Felix Xiaozhu Lin4 Xiaofeng Wang1 Kai Chen25 1Indiana University Bloomington 2SKLOIS, Institute of Information Engineering, Chinese Academy of Sciences 3Beijing Jiaotong University 4Purdue ECE 5School of Cyber Security, University of Chinese Academy of Sciences ABSTRACT participants, we conduct an in-depth characterization of three key Smartwatch has become one of the most popular wearable aspects of smartwatch usage “in the wild”: usage patterns, energy computers on the market. We conduct an IRB-approved consumption, and network traffic characteristics. This is to our measurement study involving 27 Android smartwatch users. Using knowledge the most comprehensive and in-depth crowd-sourced a 106-day dataset collected from our participants, we perform in- study of smartwatches. Our key measurement results consist of depth characterization of three key aspects of smartwatch usage “in the following. the wild”: usage patterns, energy consumption, and network traffic. • We characterize the smartwatch usage patterns. An Android Based on our findings, we identify key aspects of the smartwatch watch can stay in one of the four states with diverse power ecosystem that can be further improved, propose recommendations, characteristics: fully awake, dozing (with dimmed watch face and point out future research directions. display and restricted system activity), sleeping (screen further turned off), and charging. We find that smartwatch’s wake-up CCS Concepts period accounts for only 2% of the overall usage period among • → the four states. The wake-up sessions are not only short, but Human-centered computing Ubiquitous and mobile also frequent (72 times per day on average).
    [Show full text]
  • Op E N So U R C E Yea R B O O K 2 0
    OPEN SOURCE YEARBOOK 2016 ..... ........ .... ... .. .... .. .. ... .. OPENSOURCE.COM Opensource.com publishes stories about creating, adopting, and sharing open source solutions. Visit Opensource.com to learn more about how the open source way is improving technologies, education, business, government, health, law, entertainment, humanitarian efforts, and more. Submit a story idea: https://opensource.com/story Email us: [email protected] Chat with us in Freenode IRC: #opensource.com . OPEN SOURCE YEARBOOK 2016 . OPENSOURCE.COM 3 ...... ........ .. .. .. ... .... AUTOGRAPHS . ... .. .... .. .. ... .. ........ ...... ........ .. .. .. ... .... AUTOGRAPHS . ... .. .... .. .. ... .. ........ OPENSOURCE.COM...... ........ .. .. .. ... .... ........ WRITE FOR US ..... .. .. .. ... .... 7 big reasons to contribute to Opensource.com: Career benefits: “I probably would not have gotten my most recent job if it had not been for my articles on 1 Opensource.com.” Raise awareness: “The platform and publicity that is available through Opensource.com is extremely 2 valuable.” Grow your network: “I met a lot of interesting people after that, boosted my blog stats immediately, and 3 even got some business offers!” Contribute back to open source communities: “Writing for Opensource.com has allowed me to give 4 back to a community of users and developers from whom I have truly benefited for many years.” Receive free, professional editing services: “The team helps me, through feedback, on improving my 5 writing skills.” We’re loveable: “I love the Opensource.com team. I have known some of them for years and they are 6 good people.” 7 Writing for us is easy: “I couldn't have been more pleased with my writing experience.” Email us to learn more or to share your feedback about writing for us: https://opensource.com/story Visit our Participate page to more about joining in the Opensource.com community: https://opensource.com/participate Find our editorial team, moderators, authors, and readers on Freenode IRC at #opensource.com: https://opensource.com/irc .
    [Show full text]
  • Institutionen För Datavetenskap Cross-Platform Development For
    Institutionen f¨ordatavetenskap Department of Computer and Information Science Final thesis Cross-platform Development for Wearable Devices by Gustav Beck-Nor´en LIU-IDA/LITH-EX-A{15/038{SE 2015-06-10 Linköpings universitet Linköpings universitet SE-581 83 Linköping, Sweden 581 83 Linköping Link¨opingsuniversitet Institutionen f¨ordatavetenskap Final thesis Cross-platform Development for Wearable Devices by Gustav Beck-Nor´en LIU-IDA/LITH-EX-A{15/038{SE 2015-06-10 Supervisor: Magnus B˚ang,Link¨opingUniversity Niklas Bj¨ork´en,Accedo Broadband AB Examiner: Rita Kovordanyi, Link¨opingUniversity Abstract The market for wearable devices is continuously growing and has seen an in- crease in interest and demand this past year, specifically smartwatch devices. With several big players entering and trying to take place in the market the number of devices and platforms grow. This leads to device and software fragmentation like the one seen in the world of smartphones. In this paper I discuss and compare the two smartwatch platforms Android Wear and Apple Watch in terms of possibilities, limitations and differences. Research is done to find cross-platform development possibilities for these platforms. Extensive theoretical background of both APIs is researched and presented. An app for both smartwatch platforms is developed with integration of the WebSocket protocol to function as a remote control for a Video-On-Demand web service. This is done to showcase the cross-platform possibilities and differences of the platforms. As a result the biggest differences are out- lined and a conclusion is made that cross-platform development for these platforms can be challenging but is possible on certain levels.
    [Show full text]
  • Machine Learning and Process Intelligence Research Group
    This is a preprint. Please cite this work as: A.L. Alfeo, P. Barsocchi, M.G.C.A. Cimino, D. La Rosa, F. Palumbo, G. Vaglini, "Sleep behavior assessment via smartwatch and stigmergic receptive fields", Personal and Ubiquitous Computing, Springer, Vol. 22, Issue 2, Pages 227-243, 2017, (ISSN 1617- 4909) Machine Learning and Process Intelligence Research Group Paper draft - please export an up-to-date reference from http://www.iet.unipi.it/m.cimino/pub ORIGINAL ARTICLE Sleep behavior assessment via smartwatch and stigmergic receptive fields Antonio L. Alfeo1 · Paolo Barsocchi2 · MarioG.C.A.Cimino1 · Davide La Rosa2 · Filippo Palumbo2 · Gigliola Vaglini1 Abstract Sleep behavior is a key factor in maintaining reliable, and innovative computational approach to provide good physiological and psychological health. A well-known per-night assessment of sleep behavior to the end-user. We approach to monitor sleep is polysomnography. However, exploit heartbeat rate and wrist acceleration data, gathered it is costly and intrusive, which may disturb sleep. Conse- via smartwatch, in order to identify subject’s sleep behav- quently, polysomnography is not suitable for sleep behavior ioral pattern. More specifically, heartbeat rate and wrist analysis. Other approaches are based on actigraphy and motion samples are processed via computational stigmergy, sleep diary. Although being a good source of information a bio-inspired scalar and temporal aggregation of samples. for sleep quality assessment, sleep diaries can be affected Stigmergy associates each sample to a digital pheromone by cognitive bias related to subject’s sleep perception, deposit (mark) defined in a mono-dimensional space and while actigraphy overestimates sleep periods and night-time characterized by evaporation over time.
    [Show full text]
  • LG Watch Urbane 2Nd Edition
    MFL69361201 (1.0) (1.0) MFL69361201 Guía del usuario. User guide. User User guide. User This booklet is made from 98% post-consumer recycled paper. This booklet is printed with soy ink. Printed in Mexico Copyright©2016 LG Electronics, Inc. All rights reserved. LG and the LG logo are registered trademarks of LG Corp. Watch Urbane is a trademark of LG Electronics, Inc. All other trademarks are the property of their respective owners. About This User Guide ENGLISH Thank you for choosing LG. Please carefully read this user guide before using the device for the first time to ensure safe and proper use. Visit the LG website at www.lg.com to obtain the latest version of this manual. • Descriptions are based on the device's default settings. • Some content and illustrations may differ from your device depending on the region, service provider, software version, or OS version, and are subject to change without prior notice. Table of Contents Getting to Know Your Watch ....... 4 Controlling the Sound Setting .................27 Accessories ................................................5 Turning Your Screen Off with Theater Mode ........................................................28 About Your Watch ......................................6 Boosting Screen Brightness ....................28 Charging Your Watch .................................9 Opening the Settings Menu .....................28 If the Screen Freezes ...............................11 Managing Storage ....................................29 Replacing the SIM card ............................12
    [Show full text]
  • LG HE TV OLED 55EC900V 21Sett2015
    Comunicato stampa IMMAGINI SENZA CONFRONTI CON IL NUOVO TV OLED LG Disponibile il TV OLED curvo 55EC900V: una tecnologia unica a un prezzo irripetibile Milano, 21 settembre 2015 – Per chi è alla ricerca della massima esperienza di visione, LG presenta un nuovo TV OLED: neri e colori perfetti sono infatti gli elementi distintivi del TV OLED curvo Full HD 55EC900V, disponibile in esclusiva da Unieuro. Il nuovo 55EC900V di LG, unica azienda a disporre di una gamma di TV OLED, offre il meglio in fatto di esperienza di visione e design. Il display OLED assicura colori perfetti, proprio grazie alla rivoluzionaria tecnologia di cui è dotato: ogni pixel del pannello OLED è in grado di accendersi e spegnersi autonomamente per riprodurre un nero perfetto e, di conseguenza, colori estremamente naturali e ricchi di dettagli e sfumature. Ma non è tutto: lo schermo del TV 55EC900V è incredibilmente sottile – meno di 5mm – e l’elegante base in alluminio a forma di foglia lo rende adatto a qualsiasi ambiente. Grazie alla curvatura dello schermo, ogni spettatore si sentirà proiettato al centro della scena e resterà catturato dalla fluidità delle immagini. Non mancano infine la piattaforma Smart TV webOS, per un’interfaccia utente caratterizzata dalla massima semplicità, e la compatibilità Cinema 3D. Il TV OLED LG 55EC900V è disponibile in esclusiva da Unieuro al prezzo di 1.980 euro con finanziamento a tasso zero. www.lg.com LG Electronics, Inc. LG Electronics Inc., è leader a livello mondiale e innovatore tecnologico nei settori dell’elettronica di consumo, telefonia mobile ed elettrodomestici. L’azienda è costituita da quattro business unit - Home Entertainment, Mobile Communications, Home Appliance & Air Solutions e Vehicle Components – e ha 119 uffici distribuiti in tutto il mondo nei quali lavorano 83.000 persone.
    [Show full text]
  • LG HE Home Entertainment Strategy 08Sett2015
    Comunicato stampa A IFA 2015, LG SVELA LA PROPRIA STRATEGIA HOME ENTERTAINMENT Sarà l’OLED a guidare le innovazioni nel mercato TV Milano, 8 settembre 2015 – LG Electronics ha svelato nel corso di IFA 2015 il proprio obiettivo: quintuplicare il numero di TV OLED venduti nell’arco dei primi sei mesi dell’anno, facendo sì che entro la fine del 2015 l’OLED diventi il nuovo standard TV. Per farlo, Brian Kwon, executive vice president e CEO di LG Home Entertainment Company, ha elencato le quattro direttrici dell’azienda, volte a rafforzare la leadership di LG nel mercato dell’home entertainment. Ampliamento della line-up di TV OLED LG metterà a disposizione dei propri clienti una gamma di TV OLED ancora più vasta, con modelli totalmente nuovi, dal punto di vista di funzionalità, design e formati. Ne sono un esempio rappresentativo i primi TV OLED 4K con tecnologia HDR, alcuni dei quali caratterizzati da un design super-sottile: 4.8mm nel punto di minore spessore. Attivazione di campagne di marketing mirate L’azienda punta ad attirare l’interesse dei consumatori e a incrementare le vendite di TV OLED con campagne marketing mirate e con attività di product placement nei più importanti aeroporti del mondo. Da non dimenticare il passaparola positivo e spontaneo generato dai commenti entusiasti espressi da organizzazioni e testate autorevoli. Ad esempio, il modello 65EG960V è stato recentemente eletto “King of TV” da Value Electronics. Espansione della piattaforma Smart TV LG prevede di continuare ad arricchire la sua piattaforma webOS, con contenuti smart di partner come Netflix o YouTube, film da content provider locali e nuove applicazioni.
    [Show full text]
  • Embargo Until September 1, 00:00
    www.LG.com JULEGAVETIPS FRA LG – ÅRETS LISTE OVER HÅRDE PAKKER INDEHOLDER NOGET FOR ENHVER SMAG – Her kommer LG’s julegaveliste, som indeholder fantastiske gaveideer herunder verdens bedste TV, Europas bedste kameratelefon, den perfekte mobiltelefon til 60’plusserne og smarte højtalere til musikelskerne. København, 27. oktober, 2015 - LG Electronics giver igen i år tips til de bedste hårde julegaver, som kan lægges under juletræet. Listen indeholder noget for enhver smag, såsom stilbevidste gadget-, Android- og foto-entusiaster, musikelskere, hjemmebiograf- aficionadoer, tidspressede småbørnsforældre og teknologinysgerrige pensionister. 4K OLED-TV – Buet og flad: OLED har længe været en uopnåelig drøm med sin fantastiske billedkvalitet, men nu findes der forskellige modeller til rådighed på markedet. For hjemmebiografentusiasten, som ikke ønsker at gå på kompromis for at få den absolut bedst mulige TV-oplevelse, findes LG’s 4K OLED TV nu både i en buet (55/65EG960V) og flad (55/65EF950V) version. Læs mere her. 4K LCD-TV - Efterfølgeren til sidste års bestseller: LG UF850V hedder efterfølgeren til sidste års topsælgende 4K LCD-TV fra LG. Modellen er en super 1 www.LG.com julegave til dem, der søger en opgradering til stuen i form af et overkommeligt 4K TV med fantastisk billedkvalitet og LG’s prisbelønnede Smart-tv-system, webOS. Læs mere her. LG Easy Smart - den foldbare smartphone: LG Easy Smart er den perfekte julegave- mobil til 60’plusserne. Den nye 4G mobiltelefon kombinerer fordelene fra den traditionelle klaptelefon med alle de funktioner og apps, som du finder i en Android- smartphone med touch skærm. Læs mere her LG G4 - stilfuld smartphone i læder med fantastisk kamera: Til fotoentusiasten er LG G4, ifølge Lyd & billede og EISA, årets bedste kameratelefon og dermed den indlysende julegave.
    [Show full text]
  • Understanding the Networking Performance of Wear OS
    Understanding the Networking Performance of Wear OS XIAO ZHU, University of Michigan, USA YIHUA ETHAN GUO, Uber Technologies, Inc., USA ASHKAN NIKRAVESH, University of Michigan, USA FENG QIAN, University of Minnesota – Twin Cities, USA Z. MORLEY MAO, University of Michigan, USA Networking on wearable devices such as smartwatches is becoming increasingly important as fueled by new hardware, OS support, and applications. In this paper, we conduct a first in-depth investigation of the networking performance of Wear OS, one of the most popular OSes for wearables. Through carefully designed controlled experiments conducted in a cross-device, cross-protocol, and cross-layer manner, we identify serious performance issues of Wear OS regarding key aspects that distinguish wearable networking from smartphone 3 networking: Bluetooth (BT) performance, smartphone proxying, network interface selection, and BT-WiFi handover. We pinpoint their root causes and quantify their impacts on network performance and application QoE. We further propose practical suggestions to improve wearable networking performance. CCS Concepts: • Networks → Network protocols; Network performance evaluation; • Human-centered computing → Ubiquitous and mobile devices; Additional Key Words and Phrases: Wearable; Bluetooth; WiFi; Proxy; Interface Selection; Handover ACM Reference Format: Xiao Zhu, Yihua Ethan Guo, Ashkan Nikravesh, Feng Qian, and Z. Morley Mao. 2019. Understanding the Networking Performance of Wear OS. Proc. ACM Meas. Anal. Comput. Syst. 3, 1, Article 3 (March 2019), 25 pages. https://doi.org/10.1145/3311074 1 INTRODUCTION Smart wearable devices are becoming increasingly popular. Take smartwatches, arguably the most important type of smart wearables, as an example. According to a market research report published recently [9], the global market value of smartwatches was estimated to be $10.2 billion in 2017 and will experience an annual growth rate of 22.3% from 2018 to 2023.
    [Show full text]