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For scheduling services with different features and Qos constraints, this paper proposes a hybrid scheduling strategy, in which delay-sensitive services are granted preemptive priority and non-delay-sensitive services are granted non-preemptive priority. Theoretical analysis verified that preemptive scheme results in longer waiting length of queue.
In Vehicular Grid Sensor Network (VGSN), because the operation of individual vehicles and mobile speed and direction, contact between them fragile and unstable. It has multicast links suddenly fail to overcome the problems, so that the message flows to each node, and increase the volume of traffic control. In this paper, we propose a fuzzy-based target tracking scheme that will re-route the link path...
In real world, there are many uncertain conditions which cannot be absolutely pre-determined or controlled by the decision maker. Then, by the empirical experience in the market behavior, there are no fixed carrying cost rate, interest paid rate and interest earned rate. In this paper, we will extend Chen et al. [1] model with fuzzification in the carrying cost rate, interest paid rate and interest...
Input/Output Buffer Information Specification (IBIS) behavioral models are widely used for circuit-level signal integrity (SI) analysis due to its fast simulation speed and good accuracy. This work presents a tool to generate models of circuits specified by IBIS models. The model generation tool estimates poles, rise time and fall time of a circuit specified by IBIS models. The method consists of...
Predictive methods for learning network distances are often more desirable than direct performance measurements between end hosts. Yet, predicting network distances remains an open and difficult problem, as the results from a number of comparative and analytical studies have shown. From an application requirements perspective, there is significant room for improvement in achieving prediction accuracies...
One of the limitations of using Service Oriented Architecture (SOA) in mission critical applications (like Air Traffic Control) is the ability to specify stringent Quality of Service (QoS) parameters for individual services. Even determining which Message Broker optimizations to utilize to achieve high QoS is difficult. This research is utilizing the concepts introduced by the Queuing Network Analyzer...
The hardware implementations of decimal arithmetic operations, which are commonly used in financial, scientific, and internet-based applications requiring accuracy and speed, become prominent. In this paper we first analyze the column sum boundaries of n-digit parallel decimal array multipliers (PDAM). A general form of the problem is formed and a heuristic solution is found with Genetic Algorithm...
Primary results of fundamental research in the field of radar theory are presented. The novelty of the research consists in the following: within the scope of energy conservation law and Bayes statistical decision theory a new approach to the process of target radar signals detection on the basis of energy criterion is considered. A condition for radio-signals optimal energy detection against a background...
Data center networks are characterized by high link speeds, low propagation delays, small switch buffers, and temporally clustered arrivals of many concurrent TCP flows fulfilling data transfer requests. However, the combination of these features can lead to transient buffer overflow and bursty packet losses, which in turn lead to TCP retransmission timeouts that degrade the performance of short-lived...
The paper considers the full-range (FR) model of cellular neural networks (CNNs) with ideal hard-limiter non-linearities that limit the allowable range of the neuron state variables. It is also supposed that there is a concentrated delay (D) in the neuron interconnections. Due to the presence of multivalued nonlinearities the D-FRCNN model is mathematically described by a retarded differential inclusion...
Uncertainty in wireless networks, such as time-varying delays and packet loss, often leads to instability and degraded performance in Networked Control Systems (NCS). Further, limited network resources impose constraints on communication between plants and controllers. In this paper, we use passivity combined with adaptive sampling to design a control architecture for trajectory tracking. The proposed...
We investigate the modulational instability (MI) of the optical beam propagating in the relaxing saturable nonlinear system. We identify and discuss the salient features of various functional forms of saturable nonlinear responses such as exponential, conventional and coupled type on the MI spectrum. Using suitable model, the relaxation of the nonlinear response is effectively included alongside the...
Systems with tightly interacting computational (cyber) units and physical systems are generally referred to as cyber-physical systems. They involve an interplay between embedded systems, control theory, real-time systems and software engineering. A very good example of cyber-physical systems design arises in the context of automotive architectures and software. Modern high-end cars have 50–100 processors...
Multi-axle transportation vehicles usually adopt distributed electro-hydraulic proportional systems based on network to perform the complicated manipulation and control functions. Aiming to the adverse effects caused by network induced time delay, a networked sliding mode control strategy for leveling subsystem of multi-axle transportation vehicles is presented. The model of distributed leveling subsystem...
In this paper, the scheduling problem of the network with limited bandwidth is considered. In order to improve the network quality of service and the quality of control simultaneously, an intelligent feedback scheduling method is proposed. The scheduler reschedules the priority, the sampling period, and the output threshold concurrently according to the control authority of each node, which is calculated...
Intelligent Traffic Management (ITM) system promises to reduce the traffic congestion, intelligent intersection management as well as the smart dissemination of the informatics to control the traffic flow. Development of any Intelligent Transportation System (ITS) applications requires realistic road traffic model to analysis the performance. Service rate or service time is one of the most important...
With the intention of establishing the connectivity between the femtocell and the core network, it is essential to use public network that ultimately creates several challenges for the operators. Therefore, Synchronization is considered corner stone and has become one of the most significant issues in femtocellular networks to ensure a tolerable carrier offset as well as support received signals in...
For networked control systems (NCS), the network-induced time delay with uncertain nature may degrade the control performance and even destabilize the system. Therefore, it is necessary to study the strategies to compensate time delay. In order to effectively restrain the impact of network time delay, a single neuron PID controller combined with adaptive Smith predictor is proposed to achieve better...
This paper develops a simple analytical model based on a Markov chain that calculates saturation throughput and average packet delay for the IEEE802.11 Distributed Coordination Function (DCF) for network scenarios with voice and data stations. The analytical model is validated by comparing its results with simulation outcome. Based on the analytical model, a methodology that calculates voice capacity...
This paper illustrates a semi-active handover algorithm on the integrated utilization of RSS and location, according to characteristics of a cellular network and WiFi. While connecting to a cellular network, MS (Mobile Station) is in the passive mode, where BS (Base Station) informs the MS to hand over on the basis of location information. In contrast, MS in the WiFi link chooses the optimal AP (Access...
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