| Summary: | 碩士 === 國立臺灣科技大學 === 電機工程系 === 98 === The IEEE 802.16 mesh mode with coordinated distributed scheduling (C-DSCH) has recently become a promising technology for deploying wireless mesh network (WMN) as wireless backbone network. Therefore, the protocol design of WMN should achieve a high network throughput. In IEEE 802.16 mesh standard, the network performance is limited by the holdoff algorithm for bandwidth reservation procedure and minislot allocation mechanism for data scheduling.
In this thesis, we propose a dynamic holdoff algorithm (DHA) combined with adjoin multigrant minislot allocation (AMMA) for IEEE 802.16 mesh mode with C-DSCH. The proposed holdoff algorithm improves network throughput by decreasing the time required to establish data schedule and increase the utilization of control-plane bandwidth. In addition, adjoin multigrant minislot allocation improves data scheduling efficiency and application throughput because it efficiently allocates as many minislot as possible to meet requester node requirement using only one THP. Simulation results show that our proposed scheme performs better than existing holdoff algorithm and minislot allocation mechanism in terms of end-to-end delay, network throughput, and bandwidth satisfaction ratio.
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