Communications and network security deal with the operations undertaken to protect and defend networked communication systems by ensuring their availability, integrity, authentication, confidentiality, and non-repudiation. Availability implies that networks, end systems like databases, and applications must be survivable and fault tolerant. Networked systems should have sufficient working and spare capacity to operate under attacks, and should be designed with alarms, restoration protocols, and management configurations to detect a problem and automatically diagnose and respond to the attacks. Communications and network security also include integrity, authentication, confidentiality, and non-repudiation of both user and management information. The continually increasing reliance on networked communication technology by businesses, the general public and government services and their role in the critical infrastructure makes it imperative to have security technologies built into them.
Increasing complexity of power grids and tighter integration of renewable resources continue to present reliability challenges that require a quantum leap in harnessing information and communications technologies leading to the “smart grid”. To meet these challenges, this paper envisions a grid-wide IT architectural framework to support a multitude of geographically and temporally coordinated monitoring, analysis, and control actions over multiple timescales from milliseconds and up, through distribution of intelligence using autonomous agents. The architectural approach envisioned in the paper presents an IT framework that addresses ever-increasing grid reliability challenges by responding to steady-state and transient operating conditions in real-time more effectively and thus enabling self-healing capabilities, through utilization of modern sensing, communications, computing and control systems.IEEE Transactions on Smart Grid
Demand response, or load control, enables interactions between end-users and the grid through adapting end-users’ energy consumption to time-based pricing signals. This paper deals with the scheduling issue of demand response in residential distribution networks. The utility company considers a cost function representing the cost of providing energy to end-users. End-users’ smart appliances that can perform demand response include air-conditioning units and chargers of plug-in electric vehicles. In addition, operation of smart appliances away from desired power levels can lead to user dissatisfactions. The key problem is to minimize the electricity provider cost plus the dissatisfaction across users. The paper develops a distributed algorithm to solve the problem.IEEE Transactions on Smart Grid
This article provides readers with a very accessible introduction to network virtualization. Virtualization of computer resources has been a hot topic for some time, but network virtualization is now also becoming an equally important point of discussion. In particular, the rise of a highly mobile user base supported by the wide availability of high bandwidth wireless access is leading to a situation in which network virtualization is being viewed as a key enabler of cloud computing.IEEE Communications Magazine
Molecular communication is an emerging communication paradigm for bio-nanomachines (e.g., artificial cells, genetically engineered cells) to perform coordinated actions in an aqueous environment. This interdisciplinary research is considerably different from the traditional communication system, since it utilizes not electromagnetic waves but biological molecules both as carriers and as information. It originally mimics the existing communication mechanisms in biology, e.g., communications among micro-organisms.
Global mobile data traffic continues to experience an explosive growth, with projections of 18x growth between 2011 and 2016. This impacts the network at all stages of the delivery chain, from sources to consumers. A vital final link in this chain for mobile data is the wireless LAN, which has evolved from the first widely deployed 802.11b networks supporting 11Mbps in 1999 to the recently available 802.11ac devices (2013) supporting throughputs above 1Gbps. This paper describes in details primary improvements used to achieve the increase in throughput, such as channel bonding and multiuser MIMO.IEEE Communications Magazine
This paper validates a reference non-line-of-sight (NLOS) pathloss model named VirtualSource11p for vehicle-to-vehicle (V2V) communications in urban street intersections. Such validation is conducted with the help of independent channel measurement data. Vehicles that are approaching a street intersection often have NLOS communication from the vehicles in the other street, because buildings at the corner block the line-of-sight communication path. In such situations, the scattering of radio waves (i.e., reflection, diffraction, and refraction) from objects in the surroundings implicitly enable the signal reception. It is observed that the geometry of the street intersections, i.e., street width and alignment, structure of buildings, and antenna height, have great impacts on the received signal power.International Conference on ITS Telecommunications