Connectivity in multi-channel multi-interface wireless mesh networks

Oliveira, Carina Teixeira de; Théoleyre, Fabrice; Duda, Andrzej

doi:10.1109/iwcmc.2011.5982503

Cited by 3 publications

(8 citation statements)

References 17 publications

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“…Although the importance of the channel and interface assignment in WMN [9], the current IEEE 802.11s mesh standard lets this part unspecified. The previous drafts advocated the use of a common assignment to preserve connectivity [14].…”

Section: Channel and Interface Assignmentmentioning

confidence: 99%

“…As a result, the amount of transmitted control messages increases with the number of interfaces, which causes severe performance degradation due to heavy contention and collisions. We refer to these problems associated with flooding as the broadcast storm problem [9]. As a result, a considerable part of transmission opportunities is used to send control packets instead of data packets.…”

Section: (A) 3(b) and 3(c) In Scenarios Wherementioning

confidence: 99%

“…There is an inherent trade-off between connectivity and interference [9]. The more interfaces are assigned to the same channels, the better connectivity.…”

Section: ) Channel and Interface Assignmentmentioning

confidence: 99%

“…Although there has been significant work in MCMI WMN [7], [8], [9], understanding finely the limits of IEEE 802.11s is still an open problem. We propose here to focus on the performance issues of the Hybrid Wireless Mesh Protocol (HWMP) [2], which is the routing protocol recommended by the IEEE 802.11s standard.…”

Section: Introductionmentioning

confidence: 99%

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Performance issues with routing in multi-channel multi-interface IEEE 802.11s networks

Neto

Andrade

Braga

et al. 2014

2014 IFIP Wireless Days (WD)

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Wireless Mesh Networks have the potential to serve as an all-wireless backbone. They represent a key building block of the new Internet of Things to collect all the traffic. However, IEEE 802.11 performs very poorly in multi-hop topologies leading to unfairness and a poor throughput. Thus, the standard IEEE 802.11s proposes to re-use the IEEE 802.11 medium access in a mesh multi-hop topology while using a routing protocol to create routes at the layer 2. IEEE 802.11s may exploit multichannel multi-interface wireless routers to increase the throughput. In particular, the routing protocol must select carefully the forwarders to limit inter-and intra-flow interference. In this paper, we propose to fully characterize the performance of IEEE 802.11s when using multi-interface nodes, and to isolate some key performance issues. We also propose some key mechanisms that must be implemented to solve these pathological cases and to improve the throughput.

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Section: Channel and Interface Assignmentmentioning

confidence: 99%

Section: (A) 3(b) and 3(c) In Scenarios Wherementioning

confidence: 99%

“…There is an inherent trade-off between connectivity and interference [9]. The more interfaces are assigned to the same channels, the better connectivity.…”

Section: ) Channel and Interface Assignmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Performance issues with routing in multi-channel multi-interface IEEE 802.11s networks

Neto

Andrade

Braga

et al. 2014

2014 IFIP Wireless Days (WD)

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“…ieee 802.11-based Wireless Mesh Networks (WMN) have attracted increasing attention in recent years because of their low-cost and ease of deployment. They are composed load is not equally balanced among the different channels [5].…”

Section: Introductionmentioning

confidence: 99%

Channel assignment strategies for optimal network capacity of IEEE 802.11s

Oliveira

Théoleyre

Duda

2012

Proceedings of the 9th ACM Symposium on Performance Evaluation of Wireless Ad Hoc, Sensor, and Ubiquitous Networks

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Multi-Channel Multi-Interface (MCMI) Wireless Mesh Networks spread the load across orthogonal channels to improve network capacity. However, due to the limited number of available orthogonal channels in the radio spectrum (3 in ieee 802.11b/g and 12 in ieee 802.11a), interference and contention are still major factors in such networks. Then, an efficient channel assignment scheme is required to enhance the overall throughput. In this paper, we present three models to evaluate network capacity associated to any channel assignment strategy. These models permit also to extract what we could obtain with an optimal centralized assignment, constituting an upper bound. We present extensive numerical and simulations results, taking into account realistically MAC and routing aspects. In particular, we investigated the impact of the channel assignment strategy onto ieee 802.11s, and presented modifications that may improve its performance.

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