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Industrial wireless sensor network (IWSN) applications are required to provide precise measurement functions as feedback for controlling devices. Current industrial wireless communication protocols, such as ISA100.11a and wirelessHART, have difficulty, however, in guaranteeing latency for unpredictable on-demand communications. In this paper, a pri...
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The Industrial Internet of Things (IIoT) applications are required to provide precise measurement functions as feedback for controlling devices. The applications traditionally use polling-based communication protocols. However, in polling-based communication over current industrial wireless network protocols such as ISA100.11a, WirelessHART have di...
In IIoT, WirelessHART is one of the reliable wireless network standards since it can improve the productivity and efficiency. Recently, in Industrial area, the enterprise and the researcher have been paid attention to a mobile device, which will become one of the key points in the industry due to its potential ability. However, since WirelessHART e...
Industrial environments are typically characterised by high levels of interference. Therefore, standards for industrial wireless sensor networks (WirelessHART, ISA 100.11a, and IEEE 802.15.4e) have defined a time division and multichannel-based mode of operation, in which pairs of time slots and channels are assigned to links representing communica...
Citations
... The transmission frequency of periodic information collection is normally static. At the same time, they also require unpredictable communication for gathering on-demand data or operating devices by a center device within specific end-to-end deadlines [15][16][17]. In general, traditional industrial communication protocols over wired communications take into consideration maintaining the deadline even if the unpredictable communication occurs in the network. ...
... To increase the reliability of wireless networks for industrial applications, Time Slotted Channel Hopping (TSCH) based IWSN protocols such as WirelessHART, ISA100.11a, and IEEE802. 15.4e have been developed. They are time-synchronized and assigned communication timings for transmitting packets by a central network manager in order to decrease both interference within the wireless network and interference from other wireless networks using the same radio channels. ...
... For example, SmartMesh IP [19] that is based on the 6LoWPAN and IEEE802. 15.4e standards provides only one timeslot for downstream traffic from a center node to a device node in every 2 s by default settings, contrary to several timeslots for upstream from the nodes to a center node. ...
The Industrial Internet of Things (IIoT) applications are required to provide precise measurement functions as feedback for controlling devices. The applications traditionally use polling-based communication protocols. However, in polling-based communication over current industrial wireless network protocols such as ISA100.11a, WirelessHART have difficulty in realizing both scheduled periodic data collection at high success ratio and unpredictable on-demand communications with short latency. In this paper, a polling-based transmission scheme using a network traffic uniformity metric is proposed for IIoT applications. In the proposed scheme, a center node controls the transmission timing of all polling-based communication in accordance with a schedule that is determined by a Genetic Algorithm. Communication of both periodic and unpredictable on-demand data collection are uniformly assigned to solve the above difficulties in the schedule. Simulation results show that network traffic is generated uniformly and a center node can collect periodic data from nodes at high success ratio. The average success probability of periodical data collection is 97.4%
and the lowest probability is 95.2%.
The paper proposes a dynamic priority system at Medium Access Control (MAC) layer to schedule time sensitive and critical communications in infrastructure-less wireless networks. Two schemes, Priority Enabled MAC (PE-MAC) and Optimized PE-MAC (O-PEMAC) are proposed to ensure real-time and reliable data delivery in emergency and feedback systems. These schemes use a dynamic priority mechanism to offer improved network reliability and timely communication for critical nodes. Both schemes offer a notable improvement in comparison to the IEEE 802.15.4e Low Latency Deterministic Networks (LLDN). To ensure more predictable communication reliability, two reliability centric schemes Quality Ensured Scheme (QES) and Priority integrated QES (PQES) are also proposed. These schemes maintain a pre-specified successful packet delivery rate, hence improving overall network reliability and guaranteed channel access.
Various researchers have theoretically discussed the Hidden terminal problem in Wireless Mesh Network (WMN), but almost no standard implementation or modeling is being explored in recent years when WMN is used in large-scale communication in the presence of interference and collision. Therefore, this paper presents a framework called as Framework for Mitigating Hidden Terminal FMHT that contributes to the identification of hidden terminal followed by compensating the communication loss by introducing a novel algorithm for enhancing channel capacity. The sole target was to improve the Quality-of-Service in WMN over different conditions of dynamic traffic. The proposed system also assists in formulating an effective decision for traffic flow admission where the simulation outcome shows better improvement in data delivery performance in contrast to existing techniques.
