High-Performance Industrial Wireless: Achieving Reliable and Deterministic Connectivity Over IEEE 802.11 WLANs

Aijaz, Adnan

doi:10.1109/ojies.2020.2983259

Cited by 35 publications

(10 citation statements)

References 19 publications

(20 reference statements)

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“…However, wireless technologies offer various bene ts for network communication 48,49 . MuWNS also offers a unique wireless time synchronization capability without GPS signal input, and the expected jitter level is less than 3.3 ns and less than 10 ns respectively for the VPL and PL mode.…”

Section: Discussionmentioning

confidence: 99%

Wireless Muometric Navigation System

Tanaka

2022

Preprint

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While satellite-based global navigation systems have become essential tools in our daily lives, their effectiveness is often hampered by the fact that the signals cannot be accessed in underground, indoor, or underwater environments. Recently, a novel navigation system has been invented to address this issue by utilizing the characteristics of the ubiquitous and highly penetrative cosmic-ray muons. This technique, muometric navigation, does not require active signal generation and enables positioning in the aforementioned environments within a reference coordinate defined by the three-dimensional positions of multiple detectors. In its first phase of development, these reference detectors had to be connected to the receivers via a wired configuration to guarantee precise time synchronization. This work describes more versatile, wireless muometric navigation system (MuWNS), which was designed in conjunction with a cost-effective, crystal-oscillator-based grandmaster clock and a performance evaluation is reported for shallow underground/indoor, deep underground and undersea environments. It was confirmed that MuWNS offers a navigation quality almost equivalent to aboveground GPS-based handheld navigation by determining the distance between the reference frame and the receivers within a precision range between 1 m and 10 m.

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Section: Discussionmentioning

confidence: 99%

Wireless Muometric Navigation System

Tanaka

2022

Preprint

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“…IEEE 802.11e introduces the hybrid coordination function (HCF) controlled channel access (HCCA) which enables the polling method and the enhanced distributed channel access (EDCA) which enables priorities in the transmissions and uses the highest priority for the real-time transmissions to guarantee their access to the channel. [11], [15]- [17], [39] study the real-time performance based on the polling method using HCCA. [16] proposes a frequency domain polling method and evaluates the real-time performance through simulations.…”

Section: Related Workmentioning

confidence: 99%

RT-WiFi on Software-Defined Radio: Design and Implementation

Yun¹,

Wu²,

Zhou³

et al. 2022

Preprint

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Applying high-speed real-time wireless technologies in industrial applications has the great potential to reduce the deployment and maintenance costs compared to their wired counterparts. Wireless technologies enhance the mobility and reduce the communication jitter and delay for mobile industrial equipment, such as mobile collaborative robots. Unfortunately, most existing wireless solutions employed in industrial fields either cannot support the desired high-speed communications or cannot guarantee deterministic, real-time performance. A more recent wireless technology, RT-WiFi, achieves a good balance between high-speed data rates and deterministic communication performance. It is however developed on commercial-of-the-shelf (COTS) hardware, and takes considerable effort and hardware expertise to maintain and upgrade. To address these problems, this paper introduces the software-defined radio (SDR)-based RT-WiFi solution which we call SRT-WiFi. SRT-WiFi provides full-stack configurability for high-speed real-time wireless communications. We present the overall system architecture of SRT-WiFi and discuss its key functions which achieve better timing performance and solve the queue management and rate adaptation issues compared to COTS hardware-based RT-WiFi. To achieve effective network management with rate adaptation in multi-cluster SRT-WiFi, a novel scheduling problem is formulated and an effective algorithm is proposed to solve the problem. A multi-cluster SRT-WiFi testbed is developed to validate the design, and extensive experiments are performed to evaluate the performance at both device and system levels.

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“…The backhaul SDN controller then takes the traffic rule description and installs the defined traffic rules in each of the APs as OpenFlow rules. At each AP, the IEEE 802.11 interface defines the minimum chunk of wireless resources an STA can use, including the network interface identifier (e.g., MAC address), operating channel (e.g., 1,6,11), and the type of channel (e.g., High Throughput (HT) 20 MHz, Very High Throughput (VHT) 40 MHz). Figure 3 shows a simplified queue structure along with the data traffic flow within an AP.…”

Section: System Overviewmentioning

confidence: 99%

“…Although the date rate of such use cases is relatively low, the End-to-End (E2E) latency is expected to remain under 50 ms. In addition to using 5G Radio Access Technology (RAT), MCAs may also exploit the opportunity to offload traffic into IEEE 802.11 networks [3][4][5][6], which makes dealing with stringent QoS requirements in IEEE 802.11 networks of the utmost importance. Traditional network management solutions and techniques cannot deal with such dynamic environments and their requirements well.…”

Section: Introductionmentioning

confidence: 99%

Support for 5G Mission-Critical Applications in Software-Defined IEEE 802.11 Networks

Isolani

Kulenkamp

Márquez-Barja

et al. 2021

Sensors

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With the emergence of 5G networks and the stringent Quality of Service (QoS) requirements of Mission-Critical Applications (MCAs), co-existing networks are expected to deliver higher-speed connections, enhanced reliability, and lower latency. IEEE 802.11 networks, which co-exist with 5G, continue to be the access choice for indoor networks. However, traditional IEEE 802.11 networks lack sufficient reliability and they have non-deterministic latency. To dynamically control resources in IEEE 802.11 networks, in this paper we propose a delay-aware approach for Medium Access Control (MAC) management via airtime-based network slicing and traffic shaping, as well as user association while using Multi-Criteria Decision Analysis (MCDA). To fulfill the QoS requirements, we use Software-Defined Networking (SDN) for airtime-based network slicing and seamless handovers at the Software-Defined Radio Access Network (SD-RAN), while traffic shaping is done at the Stations (STAs). In addition to throughput, channel utilization, and signal strength, our approach monitors the queueing delay at the Access Points (APs) and uses it for centralized network management. We evaluate our approach in a testbed composed of APs controlled by SD-RAN and SDN controllers, with STAs under different workload combinations. Our results show that, in addition to load balancing flows across APs, our approach avoids the ping-pong effect while enhancing the QoS delivery at runtime. Under varying traffic demands, our approach maintains the queueing delay requirements of 5 ms for most of the experiment run, hence drawing closer to MCA requirements.

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High-Performance Industrial Wireless: Achieving Reliable and Deterministic Connectivity Over IEEE 802.11 WLANs

Cited by 35 publications

References 19 publications

Wireless Muometric Navigation System

Wireless Muometric Navigation System

RT-WiFi on Software-Defined Radio: Design and Implementation

Support for 5G Mission-Critical Applications in Software-Defined IEEE 802.11 Networks

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