CHaChA: Clustering Heuristic and Channel Assignment for IEEE 802.11s Mesh Networks

Rethfeldt, Michael; Beichler, Benjamin; Danielis, Peter; Brockmann, Tim; Haubelt, Christian; Timmermann, Dirk

doi:10.1109/iemcon.2018.8615043

Cited by 3 publications

(4 citation statements)

References 18 publications

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“…This article considerably extends a previous work [17] where we introduced the basic concepts of CHaChA and executed an early prototype evaluation. Using the status monitoring of mesh networks as application example, the general performance advantages resulting from clustering were demonstrated.…”

Section: Introductionmentioning

confidence: 52%

“…This is motivated by applications where the MCH serves administrative purposes even beyond cluster formation. Use cases include, e.g., the retrieval of status information (monitoring) of all nodes, which we outlined in a previous case study [17]. Here, on the one hand, proximity to the MCH is desirable for efficient data synchronization.…”

Section: Results For Different Grid Sizesmentioning

confidence: 99%

“…Kapse et al [10], JRCAP [11] * -CHaChA [17] Most of the earlier work done before 802.11s was specified and therefore does not use its routing mechanisms and connection information. All of the work was also studied only simulatively.…”

Section: Workmentioning

confidence: 99%

“…Comparison of CHaChA with related works (*: preliminary or modified 802.11s without ALM). Adapted with permission from ref [17]…”

mentioning

confidence: 99%

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Adaptive Multi-Channel Clustering in IEEE 802.11s Wireless Mesh Networks

Rethfeldt

Brockmann

Beichler

et al. 2021

Sensors

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WLAN mesh networks are one of the key technologies for upcoming smart city applications and are characterized by a flexible and low-cost deployment. The standard amendment IEEE 802.11s introduces low-level mesh interoperability at the WLAN MAC layer. However, scalability limitations imposed by management traffic overhead, routing delays, medium contention, and interference are common issues in wireless mesh networks and also apply to IEEE 802.11s networks. Possible solutions proposed in the literature recommend a divide-and-conquer scheme that partitions the network into clusters and forms smaller collision and broadcast domains by assigning orthogonal channels. We present CHaChA (Clustering Heuristic and Channel Assignment), a distributed cross-layer approach for cluster formation and channel assignment that directly integrates the default IEEE 802.11s mesh protocol information and operating modes, retaining unrestricted compliance to the WLAN standard. Our concept proposes further mechanisms for dynamic cluster adaptation, including subsequent cluster joining, isolation and fault detection, and node roaming for cluster balancing. The practical performance of CHaChA is demonstrated in a real-world 802.11s testbed. We first investigate clustering reproducibility, duration, and communication overhead in static network scenarios of different sizes. We then validate our concepts for dynamic cluster adaptation, considering topology changes that are likely to occur during long-term network operation and maintenance.

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Section: Introductionmentioning

confidence: 52%

Section: Results For Different Grid Sizesmentioning

confidence: 99%