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This paper is to study the stabilizability and stabilization issues of linear dynamical systems based on the delayed and noisy feedback control. For the general linear systems, the necessary conditions and sufficient conditions for mean square and almost sure stabilizability are deduced and the corresponding feedback controls are designed according to the generalized algebraic Riccati equation. It...
With the extensive application of train communication network, more and more data transmission delay and interference packet loss occurred, which causes great threat to train safety and stable running. It is necessary to study the transmission and distribution characteristics of the network control delay of high-speed EMUs, and take effective measures to reduce the impact of time delay on train control...
In this paper, fault detection problem for uncertain discrete-time switched systems with state delay is studied. Sufficient conditions of building an observer are obtained by using multiple Lyapunov function. These condition are worked out in a new simple way to obtain new LMIs with slack variables and multiple weighted residual matrices. The obtained results are applied on a numerical example.
This paper focuses on the wireless monitoring sensor networks (WMSNs), where provide relay connectivity for the low capacity and power devices to monitor or sense the events in a monitoring area. In this paper, we propose the relay OFDMA resource allocation methods of coloring resource allocation, static resource allocation and dynamic resource allocation to improve the finite resource of time and...
This paper is focused on the 5G-Crosshaul Packet Forwarding Element (XPFE), which is the packet forwarding element of the 5G-Crosshaul network architecture. The XPFE integrates multiple technologies which allow to transport traffic from multiple tenants and of different nature over the same infrastructure. Hence, the paper is focused on the performance of this essential element of our network, providing...
This paper proposes a traffic flow control system at intersections for Internet of Vehicles by combining ideas from process scheduling in Operating Systems with a ticket mechanism. The paper models an intersection as a network of mutual exclusive resources and the vehicle flows as processes that access the resources. Two graph models: Flow Intersection Network and Flow Resource Allocation Network...
We study a simple one-dimensional, discrete-time network model that consists of two nodes moving on a discrete circle, changing their direction of movement randomly, and a single packet travelling in the clockwise direction, using combinations of transmissions between the two nodes (when they are co-located) and physical transports on their buffers. In this setting, we provide exact, explicit expressions...
Using a unique dataset collected from a large classified ads website in China, we investigate the future purchase probability of coupon redeemers, particularly how it differs between users who redeem coupons right after the coupon drop and those who delay redemptions. We find that, coupon redeemers have a higher probability to make future purchases than non-redeemers no matter on which day the coupon...
Fast growth and development of software defined network (SDN) and data transmission technologies set high requirements to the quality of service (Quality of Service, QoS) of network applications, high-speed and reliable data exchange between nodes of telecommunication system with strict requirements to delays of information transmission. The exact definition of the optimal transmission route allows...
Cloud Radio Access Network (C-RAN) is a cost-effective solution for cellular operators which not only offers resource allocation and interference management flexibility, but also helps them enhance the energy efficiency of the network. The key character of the C-RAN architecture is a centralized Baseband Unit (BBU) pool which consists of high-capacity processing units and real-time virtualization...
In a wireless structural control system, a linear quadratic Gaussian regulator, under measurements loss, is used to limit the RMS structural response to natural hazards. The analysis shows the dependence of the state estimation error, and corresponding control performance, to the packet error probability and transmission delay. These metrics are studied for two communication access techniques: code-division...
Wi-Fi wireless communication has become a basic service in public areas. However, the quality of service (QoS) might be inadequate in some areas because of the following influential factors: 1) the limited number of non-overlapping channels, 2) the interference caused by unplanned deployment and mobility, 3) the rapidly changing distribution of customers, and 4) access point (AP) failures. These factors...
Nowadays the traditional architecture of computer networks (CN) requires big resources for support of transmission of growing data flows for large number of devices taking into account quality of service (QoS). It allows to solve a wide range of tasks on the organization of data exchange, providing development of information society. Complexity in service of CN is combined often with incomplete compatibility...
In this paper we derive the distribution of the total contention delay in wireless sensor networks (WSNs) tasked with detection of an intruder in a specific sensing field. We use a stochastic geometry framework to model the WSN, in which the sensor nodes send their local decisions and data to the fusion center over a shared communication channel employing a contention based MAC protocol. We first...
Software-defined networking (SDN) is one of the most debated topics in the modern IT industry. This networking concept implies that all network control functions are concentrated in a single logical center referred to as the SDN controller. This paper dwells upon the ways to reduce control traffic latency in the OpenFlow-based software-defined network. We have analyzed and classified the main latency...
The article resolves the problem of examining the possibilities for analytically synthesized regulators use to control a standard production facility with a time delay subjected to random perturbations. We synthesized various kinds of astatic system polynomial controllers for the automatic production facility control. During synthesis, the delay element is represented by the 3rd and the 1st order...
This paper studies Trust in real-time distributed database systems. High availability and fault-tolerance are important aspects of these real-time systems and are commonly achieved by replication. Different existing replication techniques are compared in this paper in terms of implementation and limitations. Also, a new replication technique; TIRS; is proposed that relies on Trust when reading or...
In designing synchronous circuits and memory elements, Flip-flops (FF) play an integral role. In the present era, the demand of area efficient, lesser delay, and faster devices are the major concern. This paper present the comparative study of Flip Flops in terms of area and delay. The problem of device size is very dominant today because the demand for small device size along with lesser number of...
While buffer-aided relaying improves the diversity of a multi-hop network, its deployment introduces time-delays, thus rendering buffering unreliable for delay-intolerant applications. To alleviate excessive delays, various studies propose delayaware protocols, but at the expense of reduced diversity, and consequently, increased outage probability. Attempts to maintain the diversity of the system...
The transient behavior of track and latch comparators is of great importance in designing a high speed comparator. This article models the pre-latching period of the evaluation phase of this type of comparators. An equation is presented which models the delay during this period with relatively good accuracy. The proposed equation can provide a better insight to the designer on the impact of different...
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