The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
MODBUS is still one of the most widespread application layer protocols used in industrial communication due to its simple request-response communication session and its readiness to be implemented on top of several lower level communication protocols and various physical media such as RS232/RS485 serial lines and Ethernet TCP/IP. Given the well-known inclination of Modbus to inter-networking, a solution...
Since radio links in wireless body area networks (WBANs) commonly experience highly time-varying attenuation due to topology instability, communication protocols with fixed transmission power cannot produce a very good performance in terms of energy consumption, interference range, and communication reliability. We explain that how channel behaviourcan be modelled using Markov Chain. Then, a power-adaptive...
Automation of modern industrial plants require real-time tracking of object locations and sensing of local and ambient parameters for variety of applications such as counting and tracking of objects in assembly line, detection and positioning of failures of machines etc. Mostly, discrete Real Time Location System (RTLS) performs object tracking in existing industrial automation without its integration...
LoRa, an emerging wireless technology, is examined for long range communication performance in a large area. Although LoRa shows good performance for long-distance transmission in the countryside, its radio signals can be attenuated and interfered with by buildings, trees and other signal sources. In urban areas, our observation shows that LoRa requires a dense deployment of LoRa gateways to ensure...
The performance of wireless mesh networks (WMNs) deployed for Internet access in rural settings is affected by several factors. Typically, deployments in African domains use cheap and computationally constrained devices with challenges such as power fluctuations, gateway congestion, VSAT communications asymmetry and low bandwidth, which affects throughput under dynamic scenarios. Caching methods can...
Internet of Vehicles requires reliable Inter-Vehicular communications. Such a requirement is challenging since the wireless communication channel is very erroneous and lossy in city environments. A lot of solutions for connecting vehicles to the internet have been proposed. However, existing multi-hop gateway discovery solutions do not consider, a key issue, the unreliability of broadcast in city...
In order to eliminate the problems associated with the conventional grids, smart grids are coming into existence nowadays. One of the advantages of smart grid is that it can utilize both conventional and non conventional sources of energy to meet the load demands and sends the monitored data to control station in digital form. ZigBee has been identified earlier as the one of the most suitable wireless...
With the foreseeable explosive growth of small cell deployment, backhaul has become the next big challenge in the next generation wireless networks in terms of capacity and latency, especially for delay-sensitive services and network functionalities. Heterogeneous backhaul deployment using different wired and wireless technologies may be a potential solution to meet this challenge. Therefore, it is...
A neighborhood area network (NAN) is part of the advanced metering infrastructure (AMI) in smart grid. A NAN is considered as the last-mile connection in AMI from the metering data management system (MDMS) to the customers, and is widely adopted to apply wireless technologies. In this paper, we propose a NAN design which is powered by green energy and rechargeable batteries for flexible and low-cost...
Wireless communication technologies for building automation (BA) systems are evolving towards native IP connectivity. More Industry Friendly and Native-IP Wireless Building Automation (IF-NIP WiBA) is needed to address the concerns of the entire value chain of the BA industry including the security, reliability, latency, power consumption, engineering process, and independency. In this paper, a hybrid...
The decentralized and lightweight architecture of Wireless Sensor Networks (WSNs) have made them ubiquitous in several scientific, medical, military, and recently in smart grid applications. They enabled pervasive computing and the implementation of intelligent systems. Recently, they have been used in today's electric power systems, to bring about intelligence and implement some of the smart grid...
Smart grid has been widely considered to be the next generation of power grid, which incorporates smart meters and two-way communications to improve the agility, reliability, efficiency, security, economy and environmental friendliness. One of the key foundations of smart grid is real-time access to meter data via a reliable communication infrastructure. In this paper, we introduce promising wireless...
Providing reliable and timely communication in wireless industrial networks is crucial. Previous research has shown that relaying can aid in achieving this goal. We consider the case when relay resources are sparse such that each relay needs to aid e.g., three different sensor nodes and propose to combine relaying with Luby codes. We let the relay node construct a Luby coded packet using the three...
Routing protocols based on gradient and cluster in wireless sensor network is analyzed. A concept of sensor node's potential is proposed. By adopting the technologies of building potential, clustering based on potential, the adjustive power routing of cluster head, a new potential-based routing protocol (PBRP) is designed. Simulation results show that the new routing protocol provides longer lifetime...
An efficient utilization and allocation of the limited resources of a wireless sensor network (WSN) in a way that maximizes the information value of the data collected is a significant research challenge. Within this context, this result concentrates on architectural approach as a means of focusing a sensor's on obtaining the important data at heterogeneous environment. Our goal is to facilitate the...
The data link layer is used to transport the network layer's data from the source to the destination node safely. This paper designed and implemented the data link layer by the WIA-PA specification. It designed 5 events which can be triggered by a timer to implement the superframe, designed a reliable data communication method based on active timeslot table and an link transmitting queue, and achieved...
In video surveillance and monitoring systems based on wireless mesh networks, large volumes of multimedia data with different priorities and time demands are generated by video cameras and wireless sensors. Hence, one of the key issues is how to alleviate network congestion for highly reliable transfer of multimedia data towards gateways. This paper proposes a solution for utilizing multiple gateways...
Industrial wireless mesh networks are deployed in harsh and noisy environments for process measurement and control applications. Compared with wireless community networks, they have more stringent requirements on communication reliability and real-time performance. Missing or delaying of the process data by the network may severely degrade the overall control performance. In this paper, we abstract...
It has been observed that the history of industrial process control development is also a history of reducing the number of wires necessary for effecting the control. Control over wireless is the end of this evolution. Wireless control faces a lot of challenges such as security, reliability, feedback latency, battery longevity, etc. In this paper we report some experience with implementing control...
Wireless sensors have started being utilized for industrial application which is typical harsh environment due to complicated layout and plentiful stationary/moving obstacles. As two hot standards for wireless industrial, WiHART and ISA100.11a, both adopt the centralized wireless sensor network with mesh topology to enable the reliable monitoring of a variety of environments. This kind of network...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.