Modeling Medium Utilization for Admission Control in Industrial Wireless Mesh Networks

Lukas, Georg; Lindhorst, Timo; Nett, Edgar

doi:10.1109/srds.2011.17

Cited by 8 publications

(6 citation statements)

References 24 publications

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“…This system will incorporate other ongoing research works within our working group [30,31] developing concepts for end-to-end quality of service guarantees (throughput, packet loss, latency) in Wireless Mesh Networks. Another aspect of our future work is to integrate the developed concepts in components for industrial wireless communication in cooperation with german product manufacturers.…”

Section: Resultsmentioning

confidence: 99%

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Achieving Fault-Tolerant Network Topology in Wireless Mesh Networks

Ivanov¹,

Nett²

2012

Wireless Mesh Networks - Efficient Link Scheduling, Channel Assignment and Network Planning Strategies

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Additional information is available at the end of the chapter http://dx.doi.org/10.5772/50173 IntroductionWireless Mesh Network (WMN) is an ad-hoc network with a fixed network infrastructure (see an example in figure 1). The physical structure of a WMN includes base stations, a backbone and mobile stations. The base stations (also known as mesh routers or mesh points) are static wireless nodes, forming the network infrastructure and providing wireless network access to the mobile stations. The backbone is a wireless ad-hoc network among the base stations. The fixed network infrastructure provides wireless network access to the mobile stations in a service area. Service area is a finite three-dimensional space. The mobile stations are wireless We consider a wireless mesh network which supports a business process and is under the administration of an organization. This is not a MANET (Mobile Ad-hoc Network) consisting of self-dependent mobile nodes, like it is often in the literature. The organization has control over the network infrastructure and aims at providing radio coverage and connectivity in a clearly defined service area. The management appliance is a central instance for basic configuration and diagnosis of the WMN, including topology monitoring, protocol settings, traffic management, etc.Radio coverage and connectivity are basic services of a wireless mesh network which are required for communication. Radio coverage ensures that the mobile stations can access the network infrastructure (backbone) while they are located or moving in the service area. Connectivity ensures that the topology of the backbone is connected. Radio coverageThe service radio coverage is correct, if the service area is covered by the base stations. The service area is covered, if the unification of radio cells of all base stations contains the whole service area. The radio cell of a base station is a part of the space around it, in which a mobile station observes the base station with a radio signal strength sufficient for communication.The sufficient radio signal strength in the service area is a basic requirement for the mobile stations to be able to access the WMN. The radio coverage service ensures this sufficient signal strength in the service area. Service location is a point of the service area, specified by its coordinates. A service location is covered, if the unification of radio cells of all base stations contains the service location. ConnectivityThe service connectivity is correct, if the backbone graph is connected. The backbone graph is a graph with the base stations as vertices and the routing layer links among them as edges. A link exists if two wireless devices can communicate through the wireless medium obeying some qualitative parameters (see section 4.3 for more information). The backbone graph represents the network topology at the routing layer. This graph is connected, if a path (a sequence of edges) exists between every two vertices. A connected backbone graph means a connected routing layer topology whic...

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Section: Resultsmentioning

confidence: 99%

“…Depending on the mobility and the required stability of a link, different approaches for determining the link state at the routing layer exist [28,31,42]. What The radio signal strength is one of the main factors which determine the reception of the packets at the receiver [14,35].…”

Section: Link State Modelmentioning

confidence: 99%

Achieving Fault-Tolerant Network Topology in Wireless Mesh Networks

Ivanov¹,

Nett²

2012

Wireless Mesh Networks - Efficient Link Scheduling, Channel Assignment and Network Planning Strategies

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“…To determine the network load caused by the HTTP interference traffic, we adapted the utilization model presented in [46]. The network utilization (U) corresponds to the intervals where the wireless channel is occupied by the transmission of MAC service data units (MSDUs) of interfering stations.…”

Section: Network Utilization Modelmentioning

confidence: 99%

Real-time communication in IEEE 802.11s mesh networks: simulation assessment considering the interference of non-real-time traffic sources

Viegas

Vasques

Portugal

et al. 2014

J Wireless Com Network

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With the widespread deployment of wireless mesh networks (WMNs) in industrial environments, real-time (RT) communication may benefit from the multi-hop relaying infrastructure provided by WMNs. However, RT communication must be able to coexist with non-RT traffic sources that will interfere with RT communication. Within this context, this paper assesses the impact of interferences caused by non-RT traffic sources upon RT traffic in IEEE 802.11s mesh networks. Through an extensive set of simulations, we assess the impact of external traffic sources upon a set of RT message streams in different communication scenarios. According to the simulation results, we infer that RT traffic in 802.11s networks may be highly affected by external interferences, and therefore, such interferences must be taken into account when setting-up 802.11s networks. By varying the network load imposed by external interferences, we provide some useful hints about utilization thresholds above which the network can no longer reliably support RT traffic. We also present insights about the setting-up of some network parameters in order to optimize the RT communication performance.

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“…While packet losses are significantly reduced by SoftMAC, the evaluation shows that applications still have to deal with loss rates up to 5% -even in a stationary scenario without mobile nodes. In [12] we present a similar approach to model and assess the medium utilization based on cross-layer monitoring to deploy an admission control that timely adapts to varying conditions and dynamics caused by node mobility. While admission control fosters QoS and avoids packet losses caused by network overload, it cannot totally prevent packet losses, especially not those caused by mobility.…”

Section: Related Workmentioning

confidence: 99%

“…We rely on the work presented in [9] to ensure connectivity within the network and coverage for the service area of mobile nodes. The cross-layer routing metric presented in [12] is utilized for admission control to prevent packet losses and latencies caused by overload. The accelerated link failure detection [11] ensures timely re-routing in case of permanent link failures.…”

Section: Related Workmentioning

confidence: 99%

Tolerating Packet Losses in Wireless Mesh Networks

Engelhardt

Lindhorst

Nett

2013

2013 IEEE International Symposium on Parallel &Amp; Distributed Processing, Workshops and PHD Forum

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Wireless Mesh Networks (WMNs) provide a promising foundation for a flexible and reliable communication infrastructure in industrial environments.Meeting the QoS demands of real-time applications, though, requires the deployment of various advanced mechanisms. Compared to wired networks, applications face higher packet loss rates in wireless networks due to the inherent unreliability of wireless communication. Furthermore, if mobile stations are involved, links that fail due to node movement frequently cause packet losses. In this paper, we present an approach to tolerate those specific losses by locally recovering lost packets and transiently re-routing them over an alternative path. The evaluation in real-world experiments shows that we can completely prevent packet loss without significantly increasing the end-to-end latency. This allows the deployment of WMNs for real-time applications without explicitly considering the increased error-proneness of wireless communication and station mobility.

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Modeling Medium Utilization for Admission Control in Industrial Wireless Mesh Networks

Cited by 8 publications

References 24 publications

Achieving Fault-Tolerant Network Topology in Wireless Mesh Networks

Achieving Fault-Tolerant Network Topology in Wireless Mesh Networks

Real-time communication in IEEE 802.11s mesh networks: simulation assessment considering the interference of non-real-time traffic sources

Tolerating Packet Losses in Wireless Mesh Networks

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