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Deployment & scheduling in Wimax with relays : IEEE802.16j

Abstract : Wimax mobile cellular systems are envisioned to provide high data rate multimedia services to users at anytime, anywhere at an affordable cost. The combination of orthogonal division multiple accesses (OFDMA) and relaying in Wimax provide rich opportunities for cost-effective and high performance networks. Wimax standard 802.16j extends not only the coverage of the cell but also increases the average throughput of the users. Much research of this standard has been published in order to optimize the performance of this network. However, when we reviewed the existing architectures of Wimax standard 802.16j and assessed their performance, we realized that the throughput of the system could still be enhanced by using a more efficient frequency reuse and scheduling algorithm. In the first part of the thesis, we review the existing standard 802.16j architectures in which the total throughput of system is slightly higher than that in the standard without relay one. To enhance even more the system performance of this standard, we propose a new architecture built on frequency reuse and sectoring technique. The total throughput increased strongly in our approach compared with to the existing studies. In the second part of the thesis, we study the impact of interference in our relay model. The simulation results showed that the SINR of mobile stations in our approach increase very slightly comparing to the one in Wimax with relay without frequency reuse and sectoring. Therefore the impact of interference is small and can be considered as negligible. We concluded that our proposition still provide a better performance. In the third part of the thesis, we proposed a new radio resource management approach in downlink in order to guarantee the user's fairness but still maintain a high total throughput. The simulation results showed that there was a trade-off between the fairness-aware and the total throughput of the system.
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Submitted on : Wednesday, October 30, 2013 - 9:46:17 PM
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Hai Dang Nguyen. Deployment & scheduling in Wimax with relays : IEEE802.16j. Networking and Internet Architecture [cs.NI]. Université d'Evry-Val d'Essonne, 2011. English. ⟨tel-00878774⟩

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