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This paper describes the design and baseband processing of a low cost real-time RF channel emulator for the testing of wireless communication systems. It incorporates six independent Rayleigh / Rician fading blocks based on the method of exact Doppler spread (MEDS), an additive white Gaussian noise (AWGN) generator based on the Box-Muller method and programmable delay blocks for up to six multipath...
A clinical decision support system and its components may malfunction due to different reasons. The objective of this work is to develop computational methods that can help us to monitor the system and assure its proper operation by promptly detecting and analyzing changes in its behavior. We develop a new change-point detection method using the Multi-Process Dynamic Linear Model. The experiments...
In reality, traffic demands are quite random, which usually deviate from the application conditions of a certain kind of signal control method and compromise the efficiency of traffic control. To solve such a problem, taking a typical isolated intersection as the research object, the adaptive control of an isolated intersection based on a complete phase group is proposed, which can automatically optimize...
Pattern recognition is a widespread application of the Wavelet Transform (WT). Sometimes, in real-time implementations a delay as low as possible is desired in the pattern detection process. This is especially important in applications such as breath or electrocardiogram (ECG) monitoring for life-support. Nevertheless, any real-time WT system which is actually implemented can present different sources...
Real-time ridesharing systems have been investigated as a potential method for improving congestions in overloaded road networks. In this paper, we specifically investigate integrating dynamic road conditions (DRCs) such as traffic accidents into the ridesharing systems, as the DRCs will cause unexpected delays during the route planning phase. We propose to use the CRP framework due to its capability...
This article describes the general theory of determining the time response characteristics of different component parts of modern automated control systems (ACS) and the method of calculating constraints on the time response characteristics of information security systems (ISS) used in ACS as real-time systems. For an arbitrary manufacturing process (both under development and existing) ACS, this...
This paper addresses the challenging problem of guaranteeing quality-of-service (QoS) requirements associated with parallel running queries in distributed stream processing engines. In such platforms, the real-time processing of streaming data often requires executing a set of user-defined queries over continues data flows. However, previous studies showed that guaranteeing QoS enforcement (such as...
In this paper we discuss a multi-agent cooperative approach for decentralized, coordinated traffic systems. Intersection controllers are equipped with agents, i.e., autonomous software systems which are capable of communicating and cooperating with one another to achieve an individual or global goal. Our approach is based on real-world traffic parameters and constraints, and is meant to be implemented...
The paper addresses the multi-target tracking problem in the framework of asynchronous sensor system. A real-time fusion algorithm is presented for asynchronous sensor system where sensors are allowed to work asynchronously with aperiodic sampling. A real-time sequentially fusion method based on Generalized Covariance Intersection (G-CI), called RTS-GCI, is presented. The proposed RTS-GCI fusion algorithm...
Toward 5G, LTE-Advanced specifies the key objective that the gigabit data rate for real-time video streaming can be transmitted under a high mobility scenario; thus, packet scheduling and radio resource management become the critical techniques that should be addressed effectively. Additionally, the mechanisms of relaying and the OFDMA coding have been certainly adopted in LTE-Advanced for the purposes...
Due to improvements in defensive systems, network threats are becoming increasingly sophisticated and complex as cybercriminals are using various methods to cloak their actions. This, among others, includes the application of network steganography e.g. to hide the communication between an infected host and a malicious control server by embedding commands into innocent-looking traffic. Currently, a...
With the rapid increasing scale of Intelligent Transportation System (ITS) and vehicular network, our quality of life are significantly improved, especially traveling in urban area. To supply a large amount of real-time ITS applications, such as navigation and automatic driving, aggregation delay should be controlled in a small range so that more data might be dropped during aggregation. State-of-the-art...
Time-Sensitive Networking (TSN) is becoming more important in automotive and industrial sectors. There is no clear strategy how to use TSN to improve and migrate the established real-time protocols without excluding legacy devices. This paper presents a realistic concept to integrate TSN into automation networks. We choose Sercos as a deterministic Industrial-Ethernet protocol to be extended with...
This paper analyzes the transmission efficiency of two kinds of communication technologies: summation frame and individual frame. The abstract models for these two communication technologies using linear topology, which is the most popular topology in industrial control field, are proposed in this paper. The simulation results based on the models show that summation frame has a significant performance...
Emergency situations require accurate and timely decisions in order to reduce delay and the additional impact of incidents on human lives and civil properties. However, decision-making in urban emergency situations is a challenging task due to the number of variables influencing the process and the unpredictable change of some of them. This process characteristic requires that decision-makers monitor...
Wearable devices, such as wristbands, smart-watches, eyewear, and wearable bio-monitors have become the focus of much attention in past year. One in ten U.S. consumers over the age of 18 now owns a modern activity tracker. These ubiquitous devices are a natural platform for formation of ad hoc networks. With almost 40% of users are above the age of 45, these older adopters are focused on improving...
Traffic crisis often happen because of traffic burden by the large number automobiles on the path. Increasing transportation move and decreasing the average waiting time of each vehicle are the aims of cooperative intelligent traffic control system. Each signal wishes to catch better travel move. During the course, signals form a strategy of cooperation in addition to restriction for neighboring signals...
Wireless sensor networks (WSNs) have been widely used in industrial systems that demand a high degree of reliability and real-time performance in communications. However, because of limited network resources and delays caused by transmission conflicts and channel contention, many industrial applications cannot meet these demands. To resolve these issues, we introduce Narrow Band Internet of Things...
Due to the volatile network topology and time-varying channel conditions, high-efficient data transmission in Vehicular Ad-hoc Networks (VANETs), especially for error-prone channels, is a challenging task. In the paper, we investigate traffic scheduling based on the Remaining Delay (RD) and propose an adaptive frame length aggregation stategy with the RD limit in VANETs. In our scheme, we classify...
Aiming at the rapid scheduling of collaborative detection traffic in Internet of things (IOT), a cooperative detection scheduling model about the bottom of IOT was designed in the paper; the model prioritized the traffic data of the sensing layer through the local scheduler of the collaboration layer, then an improved weighted round robin (IWRR) method was used to schedule the traffic data, the IWRR...
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