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Wireless Token Passing Networks (WTPN) have gained significant attention in the recent times due to the ability of these networks to overcome the challenge of channel access sharing faced by the wireless networks supporting real-time communications. A WTPN is specified as the network implementing token passing techniques in order to share the wireless channel access medium. In the token passing techniques,...
Wireless network in the field of industrial process monitoring and control system is an emerging technology. Strict delay (up to 100ms) and reliability constraint call for specialized network architectures. In this paper, we focus on resource allocation problem for wireless communication scenario referred to as Wireless Cloud Network (WCN). In WCN, coded messages are transmitted between sensors and...
To properly operate closed industrial control networks, it is required that communication with nearly constant delay bounds be supported. In [9] the authors introduced FlexTDMA in order to provide this support, and with minimal delay-jitter in an asynchronous network, under unicast communication. In this paper we consider how periodic on-off traffic and frame loss are managed in the presence of network...
The goal of this paper is to make an investigation and a timing analysis of several interesting communication protocols designed to be used in industrial control networks. By comparing protocol properties with application requirements, an appropriate protocol for the demands of the communication system can be found. The selected fieldbus protocols are discussed and a comparison of their static network...
Wireless Mesh Networks (WMNs) with chain topologies are very useful in road and railroad transportation or in tunnel and mine applications. The proposed protocols for WMNs usually support best-effort traffic or some kind of Quality of Service (QoS). However, some applications such as remote-controlled machines in industrial control networks have Hard Real-Time (HRT) requirements, i.e., strict deadlines...
High reliability and real-time performance is a must in the industrial control networks. This article discussed both advantages and disadvantages of traditional fieldbus, then the open standard Ethernet technology was introduced. By discussing the disadvantage of applying commercial Ethernet to industrial control networks, this article analyzed two methods to improve the reliability and real-time...
The transmission time delay property of fieldbus is an important factor that influences the real time property of industrial control networks. The frame transmission time of message is one important part of fieldbus transmission time delay, based on the fieldbus transmission time delay model. PROFIBUS frame transmission time mathematical model was proposed, for four data link layer severs of PROFIBUS...
With the advances in soft computing techniques and agent technologies, the concept of home ambient intelligence is becoming more and more realistic. Living in a building that adapts itself to the users and assists them in reducing their energy consumption is now within reach. The main technical barrier comes from hardware: servers and industrial control networks do not fit in a house. With the availability...
There are strong interests of using cheap and simple Ethernet technology for industrial control networks. However, traditional Ethernet is shared network using CSMA/CD protocol, which cannot ensure data determination and real-time reliability. Given the measured total delay distribution, this paper analyses the types of real-time data transmitted in industrial control networks and illustrate a hypothetical...
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