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Fair Medium Access Control Mechanism Reducing Throughput Degradation in IEEE 802.11s Wireless Mesh Networks
Malmö högskola, Faculty of Technology and Society (TS).
Malmö högskola, Faculty of Technology and Society (TS).
2016 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [sv]

Denna rapport behandlar prestandaproblem i den nyligen standardiserade Mesh kommunikationsstandarden (IEEE 802.11s). I denna rapport, undersöker och förbättra vi ett förhållande som resulterar i reduktion av genomströmningen i en kedja av noder topologi. IEEE802.11s är mycket lovande med många fördelar för både IoT-systemen och trådlösa nätverk i båda hemmet och arbete. Vi arbetar med frågan om orättvisa när CSMA/CA tillämpas, vilket orsakar genomströmningsreduktion på grund av paketförluster och indikerar svältning. Vi analyserar konsekvenserna av Collision Avoidance (CA) mekanism och föreslår en ersättning för CA som är både rättvist och samtidigt kan upprätthålla undvikande av kollisioner. Vi implementera detta i en simulator och resultatet visar på betydligt högre end-to-end-genomströmning än standard CSMA/CA och inga paketförluster på grund av buffertspill.

Abstract [en]

This thesis rapport deals with the performance issues of the newly standardized Wireless mesh protocol (IEEE 802.11s). In this thesis, we work on improving the conditions that results in throughput degradation in a chain of nodes topology. The mesh standard is very promising with many advantages for both IoT systems and home wireless networks. We work on the issue of unfairness when CSMA/CA is applied, which causes throughput degradation due to packet loss and indicates starvation. We analyze the implication of the Collision Avoidance (CA) mechanism and propose a replacement for the CA that is both fair and able to maintain collision avoidance. We implement this in a simulator and the result shows significantly higher end-to-end throughput compared to the original CSMA/CA and no packet loss due to buffer overflow.

Place, publisher, year, edition, pages
Malmö högskola/Teknik och samhälle , 2016. , p. 49
Keywords [en]
Multihop, IEEE 802.11s, Wifi, Medium access control, MAC, CSMA, Collision Avoidance, CA, Packet drop, Fairness, Buffer overflow, Unfairness, Mesh, Wireless, Network, WMN, throughput, throughput degradation, contention, two-hop interference, greedy sender, distributed
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:mau:diva-20052Local ID: 22020OAI: oai:DiVA.org:mau-20052DiVA, id: diva2:1479919
External cooperation
TerraNet AB
Educational program
TS Datateknik och mobil IT
Available from: 2020-10-27 Created: 2020-10-27 Last updated: 2022-06-27Bibliographically approved

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