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Instances of batch traffic can be seen in many applications. A set of sensors around the source of a sudden event which try to report it to the cluster head, and energy conserving MAC protocols in hierarchical networks with sleep-awake schedules which lead to burst traffics toward a single destination are good examples. The transient non-stationary nature of network reaction to batch arrivals has...
Networked Control Systems are feedback control systems wherein the control loops are closed through a real time network. The information from sensors and controllers in NCS is sent over a real-time communication network. Depending upon the topology and the routing algorithms used, the network can introduce non-deterministic and undesired delays, jitter and losses. In NCS, if the time-delay exceeds...
In this paper, we consider the problem of spectrum sharing among one primary and multiple secondary users. Particularly, we study the problem of non-cooperative spectrum sensing and access. Secondary users have to sense the channel before accessing it. There is a tradeoff between large packet delay, partially due to collisions between secondary users, and high energy consumption for sensing. To overcome...
A Wireless Networked Control Systems review is presented. It begins with a brief history about NCS (Networked Control Systems), recognizing the fundamental features, its advantages over other classical control systems, and the protocols that can be used to do control over the wireless network. Also, we deal with the different problems that can affect the network behavior; including interferences and...
Networked Control Systems (NCS) has been one of the main research areas in the last few years, due to the benefits of the insertion of a communication network in distributed systems, and the widely area of applications such as tele-operations, robotics, UAVs, power systems, among others, and new growing areas like smart grids and Cyber-Physiscal Systems. This paper surveys the main aspects on performance...
Smart grid is widely considered to be the next generation of power grid, which will be integrated with information feedback communication to improve agility, reliability, efficiency and security. One of the key foundations of smart grid is timely access to meter data via reliable communication infrastructure. In this paper, we introduce cognitive radio into home area networks of smart grid, whose...
This paper presents two multichannel non-persistent CSMA (M-np-CSMA) MAC schemes using Simple Reinforcement Learning and State-Action-Reward-State-Action (SARSA) learning respectively for distributed cognitive radio networks. The two learning schemes both use reinforcement learning to help the users learn the environment and historical transmissions. Compared with M-np-CSMA MAC protocol with random...
Channel assignment has been extensively researched for multi-radio wireless mesh networks, but it is still very challenging when it comes to its implementation. In this paper we propose a semi-dynamic and distributed channel assignment mechanism called SICA that uses game theory. To the best of our knowledge this is the first game formulation of channel assignment which takes the co-channel interference...
In this paper, stochastic network calculus is relied on to analyze the guaranteed quality of service in a cognitive radio network, mainly from the viewpoint of delay. Each user is assumed to carry an ON-OFF source with same average rate but random phase. Then the aggregated flow can be approximated by a Gaussian process, based on which specific delay distribution bound is derived. Numerical results...
Security requirements in sensor systems include resiliency against physical and side-channel attacks, low energy for communication, storage, and computation, and the ability to realize a variety of public-key protocols. Furthermore, primitives and protocols that enable trusted remote operation in terms of data, time, and location are essential to guarantee secure sensing. By integrating physically...
Today's premium vehicles are some of the most complex consumer goods-featuring a large number of different functionalities. These functionalities are being implemented by numerous Electronic Control Units (ECUs), which are often interconnected with CAN, FlexRay, LIN, and MOST. However, some car models already use Ethernet for high bandwidth applications, like diagnosis, flash update, and multimedia...
Real-time networked control systems (NCSs) over data networks are being increasingly implemented on a massive scale in industrial applications. Along with this trend, wireless network technologies have been promoted for modern wireless NCSs (WNCSs). However, popular wireless network standards such as IEEE 802.11/15/16 are not designed for real-time communications. Key issues in real-time applications...
Coal miners encounter many problems in terms of safety during coal production and development of coal industry. During mining operations at deeper and remote areas of the mine, it is hazardous to work without any communication facilities. Miners are constantly exposed to drastic change in environment with fluctuating temperature and pressure. Often it goes unnoticed as accidents do occur in coal mines...
Synchrotron light sources can produce very intense beams of X-rays and ultra violet light for a range of applications, including protein crystallography, materials characterization and high resolution imaging. The Diamond Light Source is a 3rd generation synchrotron that has recently been constructed near Oxford, United Kingdom, which produces a 3 GeV electron beam in a ring of circumference of over...
In this paper we present a new cross-layer method for the routing problem in Wireless Mesh Networks taking into account the Quality of Service (QoS) with rate adaptation. Since different routing metrics play certain importance in the multihop routing, multiple objectives such as transmission delay, traffic load and bandwidth are incorporated to the routing metric. Meanwhile a new link-layer sensing...
Most of the existing media access control protocols for cognitive radio networks are based on global dedicated common control channel (GCC). They use GCC to negotiate for data channels and to protect incumbents. The GCC is prone to saturation problem, DoS attack and wasteful of bandwidth resource. Further, it may be not available in some practical cost-sensitive applications. In this paper, we present...
This paper gives out a survey on event monitoring in Event-driven wireless sensor networks (EWSNs). In EWSNs, there are mainly two tasks, one is accurate event detection with higher detection probability and lower false-alarm probability. The other is reliable dissemination of the event information after accurate detection. In this paper, we firstly address the design issues for event detection and...
Wireless Body Area Networks (WBANs) offer tremendous benefits for remote health monitoring and real-time patient care. However, the success of such a system would primarily depend on the reliability of the data transmitted by the WBAN. Two aspects of data reliability need to be considered, namely, data accuracy and data freshness (or, recentness of data). Assuming that the sophistication of the sensors...
The K-coverage configuration in wireless sensor networks (WSNs) is widely exploited to guarantee the quality of detecting critical events, such as enemy targets, forest fires, or toxic gases. In such applications, many urgent messages should be propagated to the whole network with time constraints. Although many previous studies effectively diminish the well-known broadcast storm problem, which causes...
Cognitive radio (CR) technology is a new communication paradigm that can be a solution for the spectrum scarcity problem. A new open spectrum operation necessitates a novel routing scheme to exploit the available spectrum opportunistically. In this paper, we propose a distributed routing scheme for multi-hop cognitive radio mesh networks. In cognitive radio networks the behavior of the primary user...
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