A Study of Performance Improvement on the 802.16e/ 802.16j Co-existence WiMAX System
Date Issued
2008
Date
2008
Author(s)
Hung, Ho-Peng
Abstract
The objective of this thesis is to study the performance improvement under the co-existence of 802.16e and 802.16j WiMAX systems. The two-layered architecture is adapted to investigate the performance measurements including the system capacity, call successful rate, and channel utilization. Under the environment of full coverage of 802.16j cells in 802.16e, the cells of 802.16e cover larger area and designed to serve high speed users. On the other hand, cells of 802.18j cover smaller areas are designed to server pedestrian and low speed user so as to reduce the handover failure rate. The overflow, channel reservation, and the hybrid algorithms are also studied for further improvement.ur main contributions are as follow. Proposed the frequency assignment under co-existence of 802.16j and 802.16e following constrain of 802.16 specifications to achieve the maximum capacity. The frequency pattern and adaptive modulation are also taken into consideration.. The overflow and channel reservation algorithms are studied to improve the performance including call successful rate, and channel utilization.. The hybrid algorithm is proposed for further improvement.
Subjects
WiMAX
Performance
Type
thesis
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