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

Networked sensors-those that coordinate amongst themselves to achieve a larger sensing task-will revolutionize information gathering and processing both in urban environments and in inhospitable terrain. The sheer numbers of these sensors and the expected dynamics in these environments present unique challenges in the design of unattended autonomous sensor networks. These challenges lead us to hypothesize that sensor network coordination applications may need to be structured differently from traditional network applications. In particular, we believe that localized algorithms (in which simple local node behavior achieves a desired global objective) may be necessary for sensor network coordination. In this paper, we describe localized algorithms, and then discuss directed diffusion, a simple communication model for describing localized algorithms.

https://www.cs.jhu.edu/~cs647/class-papers/Sensor%20Nets/estrin.pdf

Next century challenges: scalable coordination in sensor networks

Underwater sensor nodes will find applications in oceanographic data collection, pollution monitoring, offshore exploration, disaster prevention, assisted navigation and tactical surveillance applications. Moreover, unmanned or autonomous underwater vehicles (UUVs, AUVs), equipped with sensors, will enable the exploration of natural undersea resources and gathering of scientific data in collaborative monitoring missions. Underwater acoustic networking is the enabling technology for these applications. Underwater networks consist of a variable number of sensors and vehicles that are deployed to perform collaborative monitoring tasks over a given area. In this paper, several fundamental key aspects of underwater acoustic communications are investigated. Different architectures for two-dimensional and three-dimensional underwater sensor networks are discussed, and the characteristics of the underwater channel are detailed. The main challenges for the development of efficient networking solutions posed by the underwater environment are detailed and a cross-layer approach to the integration of all communication functionalities is suggested. Furthermore, open research issues are discussed and possible solution approaches are outlined. � 2005 Published by Elsevier B.V.

/pdf/underwater-acoustic-sensor-networks-research-challenges-15fjl1gvhc.pdf

Underwater acoustic sensor networks: research challenges

National Institute of Standards and Technology における超伝導研究及び生活

Ad hoc networks are a new wireless networking paradigm for mobile hosts. Unlike traditional mobile wireless networks, ad hoc networks do not rely on any fixed infrastructure. Instead, hosts rely on each other to keep the network connected. Military tactical and other security-sensitive operations are still the main applications of ad hoc networks, although there is a trend to adopt ad hoc networks for commercial uses due to their unique properties. One main challenge in the design of these networks is their vulnerability to security attacks. In this article, we study the threats on ad hoc network faces and the security goals to be achieved. We identify the new challenges and opportunities posed by this new networking environment and explore new approaches to secure its communication. In particular, we take advantage of the inherent redundancy in ad hoc networks-multiple routes between nodes-to defend routing against denial-of-service attacks. We also use replication and new cryptographic schemes, such as threshold cryptography, to build a highly secure and highly available key management service, which terms the core of our security framework.

/pdf/securing-ad-hoc-networks-3hudjv4io2.pdf

Securing ad hoc networks

This document provides recommendations for jittering (randomly\nmodifying timing) of control traffic transmissions in MANET routing\nprotocols to reduce the probability of packet collisions.

Jitter considerations in MANETs

The IEEE WAVE protocol suite is providing communications services to applications in vehicular networks, by way of promising support for two protocol stacks: the Wave Short Message Protocol (WSMP) and IPv6. While WSMP is developed within the IEEE 1609 family of standards, the authors of this paper assert, that considerations for IPv6 operation for WAVE are less developed, and several issues are left unaddressed by the current IEEE 1609 specifications. This paper reviews these issues and analyzes the main challenges in providing proper IPv6 operation for WAVE networks.

/pdf/ipv6-operation-for-wave-wireless-access-in-vehicular-14qqzjzrh8.pdf

IPv6 operation for WAVE — Wireless Access in Vehicular Environments

In this paper, we evaluate the performance of two MANET routing protocols under varying traffic, density and mobility conditions. We observe, that a rather large fraction of the traffic being carried on the Internet today carries TCP. Thus, Internet traffic has inheritly different characteristics than that of CBR traffic, which is the commonly used traffic type for evaluating MANET routing protocol performance. Hence, in this paper, we extend our evaluations of the two protocols to include the performance of both TCP and CBR traffic. We find, that testing a protocol using CBR traffic is not a good indicator for the same protocols performance when subject to TCP traffic.

https://hal.inria.fr/inria-00471707/document

Comparative Study of CBR and TCP Performance of MANET Routing Protocols

“The Trickle Algorithm” is conceived as an adaptive mechanism for allowing efficient and reliable information sharing among nodes, communicating across a lossy and shared medium Its basic principle is, for each node, to monitor transmissions from its neighbours, compare what it receives with its current state, and schedule future transmissions accordingly: if an inconsistency of information is detected, or if few or no neighbours have transmitted consistent information “recently”, the next transmission is scheduled “soon” - and, in case consistent information from a sufficient number of neighbours is received, the next transmission is scheduled to be “later” Developed originally as a means of distributing firmware updates among sensor devices, this algorithm has found use also for distribution of routing information in the routing protocol RPL, standardised within the IETF for maintaining a routing topology for low-power and lossy networks (LLNs) Its use is also proposed in a protocol for multicast in LLNs, denoted “Multicast Forwarding Using Trickle” This paper studies the performance of the Trickle algorithm, as it is used in that multicast protocol

/pdf/performance-analysis-of-trickle-as-a-flooding-mechanism-1iieqphgfq.pdf

Performance analysis of Trickle as a flooding mechanism

Mobile Ad hoc NETworks (MANETs) are leaving the confines of research laboratories, to find place in real-world deployments. Outside specialized domains (military, vehicular, etc.), citywide community-networks are emerging, connecting regular Internet users with each other, and with the Internet, via MANETs. Growing to encompass more than a handful of “trusted participants”, the question of preserving the MANET network connectivity, even when faced with careless or malicious participants, arises, and must be addressed.

/pdf/vulnerability-analysis-of-the-optimized-link-state-routing-55x539yqr7.pdf

Thomas Clausen

Papers

Jitter considerations in MANETs

IPv6 operation for WAVE — Wireless Access in Vehicular Environments

Comparative Study of CBR and TCP Performance of MANET Routing Protocols

Performance analysis of Trickle as a flooding mechanism

Vulnerability analysis of the optimized link state routing protocol version 2 (OLSRv2)