• Summary of the paper (about 200 words)
• What problems are the authors solving?  
• What are the main contributions of the paper?
• What are the weaknesses/limitations of the paper?
• Among the 8 research issues discussed in Section III, what is the most important (or interesting) issue for you? Why?

These questions are to be answered , from the attached paper.

Research Directions for the Internet of ThingsJohn A. Stankovic,Life Fellow,IEEE(Invited Paper)Abstract—Many technical communities are vigorously pursuingresearch topics that contribute to the Internet of Things (IoT).Nowadays, as sensing, actuation, communication, and control be-come even more sophisticated and ubiquitous, there is a signifcantoverlap in these communities, sometimes from slightly differentperspectives. More cooperation between communities is encour-aged. To provide a basis for discussing open research problems inIoT, a vision for how IoT could change the world in thedistant future isfrst presented. Then, eight key research topicsare enumerated and research problems within these topics arediscussed.Index Terms—Cyber physical systems, Internet of Things(IoT), mobile computing, pervasive computing, wireless sensornetworks.I. INTRODUCTIONTHE notions Smart devices, Smartphones, Smart cars,Smart homes, Smart cities—A smart world—have beenespoused for many years. Achieving these goals has beeninvestigated, to date, by many diverse and often disjoint researchcommunities. Five such prominent research communities are:Internet of Things (IoT), mobile computing (MC), pervasivecomputing (PC), wireless sensor networks (WSNs), and, mostrecently, cyber-physical systems (CPS). However, as technologyand solutions progress in each of thesefelds, there is anincreasing overlap and merger of principles and research ques-tions. Narrow defnitions of each of thesefelds are no longerappropriate. Further, research in IoT, PC, MC, WSN, and CPSoften relies on underlying technologies such as real-time com-puting, machine learning, security, privacy, signal processing,big data, and others. Consequently, thesmart vision of the worldinvolves much of computer science, computer engineering, andelectrical engineering. Greater interactions among these com-munities will speed progress.In this paper, as a backdrop to identifying research questions,Section II briefly highlights a vision for a smart world. Section IIIthen discusses open research questions categorized into eighttopics. The research discussed is representative rather thancomplete. Two goals of the paper are: 1) to highlight a numberof signifcant research needs for future IoT systems; 2) to raiseawareness of work being performed across various researchcommunities.II. VISION AND IOTSCOPEMany people [8], including myself [28], [29], hold the viewthat cities and the world itself will be overlaid with sensing andactuation, many embedded in“things”creating what is referredto asasmart world. But it is important to note that onekey issue isthe degree of the density of sensing and actuation coverage. Ibelieve that there will be a transition point when the degree ofcoverage triples or quadruples from what we have today. At thattime, there will be aqualitativechange. For example, nowadays,many buildings already have sensors for attempting to saveenergy [7], [38]; home automation is occurring [3]; cars, taxis,and traffc lights have devices to try and improve safety andtransportation [9]; people have smartphones with sensors forrunning many useful apps [2]; industrial plants are connecting tothe Internet [1]; and healthcare services are relying on increasedhome sensing to support remote medicine and wellness [11].However, all of these are just the tip of the iceberg. They are allstill at earlystagesofdevelopment.Thesteadyincreasing densityof sensing and the sophistication of the associated processingwill make for a signifcantqualitative changein how we workand live. We will truly have systems-of-systems that synergisti-cally interact to form totally new and unpredictable services.What will be the platform or platforms that support such avision? One possibility is a global sensing and actuation utilityconnected to the Internet. Electricity and water are the twoutilities that can be used for a myriad of purposes. Sensing andactuation in the form of an IoT platform will become a utility. IoTwill not be seen as individual systems, but as a critical, integratedinfrastructure upon which many applications and services canrun. Some applications will be personalized such as digitizingdaily life activities, others will be city-wide such as effcient,delay-free transportation, and others will be worldwide such asglobal delivery systems. In cities, perhaps there will be no traffclights and even 3-D transportation vehicles. Smart buildings willnot only control energy or security, but integrate personalcomfort, energy savings, security, and health and wellnessaspects into convenient and effective spaces. Individuals mayhave patches of bionic skin with sensing of physiological para-metersbeing transmittedtothe cloudwhich houseshis/herdigitalhealth, and to the surrounding smart spaces for improved com-fort,health, effciency,and safety. In fact,smartwatches, phones,body nodes, and clothes will act as personalized input to optimizecity-wide services benefting both the individual and society.Consequently, we will often (perhaps 24/7) be implicitly linkedinto the new utility. Some examples of new services includeimmediate and continuous access to the right information for thetask at hand, be it, traveling to work or a meeting, exercising,shopping, socializing, or visiting a doctor. Sometimes theseManuscript received January 03, 2014; accepted March 09, 2014. Date ofpublicationMarch 18, 2014; date of current version May 05, 2014. This work wassupported by the National Science Foundation under Grant CNS-1239483, GrantCNS-1017363, and Grant CNS-1319302.The author is with the Computer Science Department, University of Virginia,Charlottesville, VA 22904 USA (e-mail: stankovic@cs.virginia.edu).Digital Object Identifer 10.1109/JIOT.2014.2312291IEEE INTERNET OF THINGS JOURNAL, VOL. 1, NO. 1, FEBRUARY 201432327-4662 © 2014 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission.See http://www.ieee.org/publications_standards/publications/rights/index.html for more information.

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