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The evaluating indexes for the reliability of equipment support network plays an important role in the study of equipment support networking under the information conditions, and the evaluating indexes are the precondition and foundation for testing the reliability of equipment support network. The paper firstly defines equipment support network and the reliability of the network, and then makes the...
Traditionally, transmission power is adjusted dynamically to overcome unreliability over lossy links in energy-constrained Wireless Sensor Networks (WSNs). The network node increases its transmission power to achieve immunity against link errors or lowers the power to save energy and prevent interference. Through systematic analysis, we illuminate that it adversely affects the channel contention,...
This paper discusses mobile hidden station (MHS) problem which is a significant source of packet collisions in medium access control (MAC) protocols of vehicular networks due to relatively high node speeds. MHS problem occurs when mobile stations that are not present in the channel reservation period enter and disturb the existing communications. We present effect of MHS problem using Markov model...
Wireless sensor networks (WSNs) can be used for a variety of applications. For many applications, a high reliability and low delay are required. Due to lossy feature of wireless channel, providing a reliable communication is very challenging. The most frequently used approach for providing the reliability is to use the acknowledgement based retransmission mechanism which increases the end-to-end delay...
Bias Temperature Instability (BTI) becomes one of the most important reliability issues for nanometer process devices. We focus on aging degradation by BTI because it is known as one of the dominant factor that determines life time of circuits. In this paper, we show circuit delay degradation characteristic of BTI using the circuit simulation. The delay increase 15% after 10 years stress.
A QoS-aware and priority-based multipath routing (QoSPMR) algorithm is proposed for WMSNs. The proposed algorithm comprehensively considers the categories and priorities of multimedia streams, the residual energy of nodes, the local link reliability between nodes, the local congestion status and the distance from the candidate next hop nodes to the sink. Simulation results show the QoSPMR algorithm...
In this work, we present an empirical support of an analytical approach which employs a frequency domain analysis for estimating end-to-end delay in multi-hop networks. The proposed analytical results of the end-to-end delay distribution are validated through simulation and compared with queueing based analysis by defining two concrete scenarios. Our results demonstrate that an analytical prediction...
The introduction of a market-based balancing system can be particularly complex in those countries where the spot market is not transparent or does not provide sufficient liquidity for the Transmission System Operator's flexibility needs. This is indeed the case for Italy: this paper provides an experimental analysis of the balancing market to be launched in Italy within the outlined framework. Through...
Triple modular redundancy (TMR) is a common method to implement fault-tolerant circuits. Traditionally, TMR is realized by triplication of components. In order to reduce the area overhead of TMR another approach was proposed on coarse grained reconfigurable architectures (CGRAs). In that approach spare functional units (FUs) are used for redundant computation of results. However, it was not shown...
The communication network is a main component of digital substation, its performance has a great influence on the security and reliability of power system. Considering IEC61850, by real time digital simulator (RTDS), the merging units and intelligent switches in the digital substation communication network simulation platform are established. Meanwhile, according to the main wire in 220kV substation,...
Data dissemination over long distances in urban scenarios is the foundation of many VANET applications, but rapid shifting in network topology, unstable quality of wireless communication and channel capacity constraints of VANETs pose many challenges to data dissemination. In response, we propose a connectivity-aware data delivery mechanism on the basis of an improved greedy broadcasting. Moreover,...
This paper presents a novel routing protocol based on the Learning Automata method for large scale Wireless Sensor Networks (WSNs) codenamed DRLR (distributed reinforcement learning routing). In this method, each node is equipped with learning automata so that it can learn the best path to transmit data toward the sink. The approach proved to be efficient, reliable, and scalable. It also prevents...
The environmental conditions, e.g., fading, multi-path, obstructions, in smart grid environment, prevent reliable and successful packet transmissions for Wireless Sensor Network (WSN) technology. To provide reliable communications with WSN, to overcome the harsh environmental conditions of smart grid, and to prolong the network life time, reliable link quality estimation should be made and routing...
With the increased application of wireless sensor networks (WSNs) to military and civilian environments, securing the data in the network has become a critical issue. The severe resource constraints of sensor nodes and the broadcast nature of the wireless links as well as the challenging deployment environments of wireless sensor networks pose challenges for the quality and security of data transmission...
Battery systems for electric vehicles (EVs) or uninterruptible micro-gridsâ"prototypical cyber-physical systems (CPSs)â"are usually built with several hundreds/thousands of battery cells. How to deal with the inevitable failure of cells quickly and cost-effectively for vehicle warranty or uninterruptible service, for instance, is key to the development of large-scale battery systems. Use...
Reliability and energy efficiency are two key performance metrics in wireless body area network (WBAN) to meet the requirement of healthcare applications. The network architecture of WBAN has significant impact on transmission performance. In this paper, we investigate the network architecture through the measurement study of WBANs. In particular, we measure the performance achieved for star and multihop...
In order to solve the reliability of multicast communication in Wireless Ad hoc networks, proposes a fault-tolerant multicast protocol, adds a multicast fault tolerance in the network layer and application layer, and has been verified by experiments in reliable packet delivery, port to port delay control, error control with good results.
Urban traffic congestion has become a global phenomenon in recent years, resulting in a great waste of time and fuel. Thus, it is a great challenge for both scientists and engineers to detect the road condition timely and accurately. The technology of vehicular ad-hoc networks (VANETs) applied in intelligent transportation system (ITS) is a new promising approach to alleviate this problem. In this...
In wireless sensor networks (WSNs), the real-time data dissemination protocols exploit the spatiotemporal communication approach which forwards data at the delivery speed calculated with the desired time deadline and the end-to-end distance. However, the protocols do not focus on the reliable communication. Recently, MMSPEED is proposed for both reliable and real-time data delivery based on multipath...
Geographic multipath routing is one of the most appropriate approaches which can improve the end-to-end reliability via multiple paths for the wireless sensor networks that have frequent network dynamics such as both node and link failures. It has been focused on how to construct a node-disjoint multipath that an intermediate node should be belonged by only a single path. It is because that if two...
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