Empirical network jitter measurements for the simulation of a networked control system

Premaratne, Upeka

doi:10.1109/icter.2014.7083907

Cited by 5 publications

(4 citation statements)

References 34 publications

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“…In practice, the generation of jitter is random and unpredictable. Therefore, the determination of this value is difficult [29]- [31]. It is necessary to set a value that needs to be larger than the average delay of the network to ensure the correctness of the transmitted data.…”

Section: Discussionmentioning

confidence: 99%

An Enlarging-the-Capacity Packet Sorting Covert Channel

et al. 2019

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The construction method of the covert channel has always been a topic of research and exploration in the field of information security, and the use of IP data packets for covert channel construction is also an important method. Based on the above content, this paper proposes an enlarging-the-capacity packet sorting covert channel. We establish enlarging-the-capacity packet sorting covert channel model and derive the functional relationship between the total number of covert information transmitted and the number of ports. This method can send more secret information when the network status is not ideal. The simulation results show that the covert channel of the extended packet sorting has high performance in different packet loss rates and delays, and is superior to other IP covert channel.INDEX TERMS Information security, information hiding, inter-packet interval covert channel, packet sorting covert channel.

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Section: Discussionmentioning

confidence: 99%

An Enlarging-the-Capacity Packet Sorting Covert Channel

et al. 2019

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“…These consequences can cause significant stability issues in control systems [36] [37]. Thus, they motivate the minimization of bandwidth requirements of such control systems by reducing the effective sampling rate through sporadic transmission of the data over the communication network [38] [39] [40].…”

Section: A Motivating Example and Problem Statementmentioning

confidence: 99%

Extremum Seeking Control With Sporadic Packet Transmission for Networked Control Systems

Premaratne

Halgamuge

Tan

et al. 2020

IEEE Trans. Control Netw. Syst.

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Extremum Seeking Control (ESC) is a data-driven optimization technique that can steer a dynamic plant towards an extremum of an unknown but measurable, input to steadystate map. In the context of Networked Control Systems (NCS) a new implementation method for ESC inspired by the well known Luus-Jaakola algorithm is proposed. The main motivation is to minimize the communication burden associated with the search phase of ESC. In the proposed method the controller only requires a notification of a change registered at the sensor, rather than the full information available at the sensor. This event based approach leads to sporadic packet transmission. In addition the proposed method is able to directly account for constraints whilst seeking for the desired extremum. The constraints may be of the inequality or equality type. The algorithm's behavior is illustrated on a networked water pump control system.

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“…In a networked control system (NCS) that is packet switched, when a periodically sampled variable is transmitted over the communication network it can be subject to the congestion related issues such as delay, delay variation, and packet drops as reported in Zampieri (2008), Donkers et al (2011), andPremaratne (2014). In Wu et al (2013), it is demonstrated that congestion can lead to increased packet drops.…”

Section: Motivationmentioning

confidence: 99%

“…From Assumption 4, the ESC scheme of equation (1) need not be considered as a discrete system as in Choi et al (2002). Assumptions 5 and 6 are necessary to neglect any effect due to delay and delay variation (jitter), which is inevitable in a packet switched communication network according to the results of Zampieri (2008), Donkers et al (2011), andPremaratne (2014).…”

Section: Encoding Scheme and Communication Network Modelmentioning

confidence: 99%

Bandwidth Reduction and Convergence Analysis of Extremum Seeking Control with Feedback Encoding

Wijesinghe

Premaratne

2016

Front. Mech. Eng.

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Frequently, a physical plant of a control system has an optimum operating point such as the spark (or injection) time of an internal combustion engine that results in maximum torque. Extremum Seeking Control (ESC) is a method of adaptive control capable of locating and maintaining a plant at such an optimum operating point in real time. It is capable of doing so with minimal a priori knowledge of the plant and can also track slowly varying changes. Input perturbed ESC schemes that use periodic dither signals have the disadvantage of requiring a high bandwidth for sampling and correlating the plant output with the dither signal. If the feedback path was to be implemented over a packet switched communication network, the high bandwidth requirement could result in increased congestion and consequently packet delays and dropouts. As a solution encoding using sporadic (aperiodic) sampling techniques can be used in the feedback path of the ESC scheme to reduce the required bandwidth. However, in order to ensure convergence of the ESC scheme with encoding, the effect of the signal reconstruction error due to encoding on the critical correlation stage has to be investigated. The contribution of this paper is an investigation of the convergence requirements and bandwidth performance of two encoding schemes; Memory-Based Event Triggering (MBET) and Event Triggered Adaptive Differential Modulation (ETADM). The results show that MBET can fail for objective functions with plateaus. ETADM fails when the number of ETADM steps used for reconstructing the plant output per perturbation cycle is too low to allow correlation. In terms of bandwidth reduction MBET performs better than ETADM (97% and 70%, respectively). However, the use of MBET results in a longer convergence time.

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Empirical network jitter measurements for the simulation of a networked control system

Cited by 5 publications

References 34 publications

An Enlarging-the-Capacity Packet Sorting Covert Channel

An Enlarging-the-Capacity Packet Sorting Covert Channel

Extremum Seeking Control With Sporadic Packet Transmission for Networked Control Systems

Bandwidth Reduction and Convergence Analysis of Extremum Seeking Control with Feedback Encoding

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