There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

https://minerva-access.unimelb.edu.au/bitstream/handle/11343/197439/1207.0203v1.pdf

Internet of Things (IoT): A vision, architectural elements, and future directions

This paper provides an overview of the Internet of Things (IoT) with emphasis on enabling technologies, protocols, and application issues. The IoT is enabled by the latest developments in RFID, smart sensors, communication technologies, and Internet protocols. The basic premise is to have smart sensors collaborate directly without human involvement to deliver a new class of applications. The current revolution in Internet, mobile, and machine-to-machine (M2M) technologies can be seen as the first phase of the IoT. In the coming years, the IoT is expected to bridge diverse technologies to enable new applications by connecting physical objects together in support of intelligent decision making. This paper starts by providing a horizontal overview of the IoT. Then, we give an overview of some technical details that pertain to the IoT enabling technologies, protocols, and applications. Compared to other survey papers in the field, our objective is to provide a more thorough summary of the most relevant protocols and application issues to enable researchers and application developers to get up to speed quickly on how the different protocols fit together to deliver desired functionalities without having to go through RFCs and the standards specifications. We also provide an overview of some of the key IoT challenges presented in the recent literature and provide a summary of related research work. Moreover, we explore the relation between the IoT and other emerging technologies including big data analytics and cloud and fog computing. We also present the need for better horizontal integration among IoT services. Finally, we present detailed service use-cases to illustrate how the different protocols presented in the paper fit together to deliver desired IoT services.

Internet of Things: A Survey on Enabling Technologies, Protocols, and Applications

In recent year, the Internet of Things (IoT) has drawn significant research attention. IoT is considered as a part of the Internet of the future and will comprise billions of intelligent communicating `things'. The future of the Internet will consist of heterogeneously connected devices that will further extend the borders of the world with physical entities and virtual components. The Internet of Things (IoT) will empower the connected things with new capabilities. In this survey, the definitions, architecture, fundamental technologies, and applications of IoT are systematically reviewed. Firstly, various definitions of IoT are introduced; secondly, emerging techniques for the implementation of IoT are discussed; thirdly, some open issues related to the IoT applications are explored; finally, the major challenges which need addressing by the research community and corresponding potential solutions are investigated.

The internet of things: a survey

The Internet of Things (IoT) shall be able to incorporate transparently and seamlessly a large number of different and heterogeneous end systems, while providing open access to selected subsets of data for the development of a plethora of digital services. Building a general architecture for the IoT is hence a very complex task, mainly because of the extremely large variety of devices, link layer technologies, and services that may be involved in such a system. In this paper, we focus specifically to an urban IoT system that, while still being quite a broad category, are characterized by their specific application domain. Urban IoTs, in fact, are designed to support the Smart City vision, which aims at exploiting the most advanced communication technologies to support added-value services for the administration of the city and for the citizens. This paper hence provides a comprehensive survey of the enabling technologies, protocols, and architecture for an urban IoT. Furthermore, the paper will present and discuss the technical solutions and best-practice guidelines adopted in the Padova Smart City project, a proof-of-concept deployment of an IoT island in the city of Padova, Italy, performed in collaboration with the city municipality.

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Internet of Things for Smart Cities

On the Performance of Connection Admission Control and Traffic Management Schemes in a DVB-RCS Suited Satellite System

Key issues in the design of soft handoff policies for DVB-H systems are energy saving and constant monitoring of the received signal quality. With this idea in mind, a novel algorithm is proposed in this paper with the aim of reducing the frequency of handoff-related measurements in DVB-H systems, thus enabling manifest power saving in portable terminals than in the case of standard RSSI-based procedure. The objective is accomplished by making handoff algorithm be driven by the quality of the signal received by the user, constantly monitored through techniques of MER (Modulation Error Rate) measurement and estimation. The performing behavior of the proposed mechanism, assessed through a comprehensive evaluation campaign, allows us being confident that this is a direction to consider for future research activities in the field of effective DVB-H handoff protocols design.

Quality based Handoff Management in DVB-H Systems

In an integrated terrestrial-satellite system exploiting W-CDMA air interfaces, such as the future UMTS, we conduct an in-depth research on radio resource management techniques for the support of multimedia applications with quality guarantees. The multi-bearer transmission coupled with a multitier coverage has the potentiality of allowing the effective exploitation of the radio resources while guaranteeing an adaptive quality to all end-users. Nevertheless, it still remains to be clearly understood how good they cope with typical features of next-generation multimedia cellular systems, such as soft handoff. This paper tries to contribute to this issue by reporting the lessons learned during a performance assessment study on a simulation platform of a UMTS system.

Introducing the Adaptive-QoS Idea into Multi-Tier UMTS Systems: The Lessons Learned

Quality of Service Provisioning to Multimedia Applications in Satellite Systems

This paper aims at contributing to the dimensioning of the signalling bandwidth of a broadband geo-satellite system for multimedia communications. Signalling channels are used by the satellite terminals to set up connections and ask for on-demand resource assignment. A smart dimensioning of the satellite bandwidth plays a key role in the fulfillment of the service quality required by multimedia traffic and the effective exploitation of the satellite spectrum. We accomplish this task by designing a statistical centralised CAC accorded with an intelligent scheduling of the resource requests on board the satellite. The proposed traffic and resource management techniques have been tested over a simulation platform for the EuroSkyWay satellite system.

Antonio Iera

Papers

On the Performance of Connection Admission Control and Traffic Management Schemes in a DVB-RCS Suited Satellite System

Quality based Handoff Management in DVB-H Systems

Introducing the Adaptive-QoS Idea into Multi-Tier UMTS Systems: The Lessons Learned

Quality of Service Provisioning to Multimedia Applications in Satellite Systems

Multimedia traffic in broadband satellite networks