A Dynamic Resource Block Reuse Mechanism and its Performance Analysis in IEEE 802 22 Wireless Regional Area Networks

Abstract

IEEE 802 22 which was developed for wireless regional area networks (WRANs) is the first Cognitive Radio (CR) enabled network standard It helps to solve spectrum shortage problem by making use of licensed spectrum on the premise that it will not cause interference to licensed users This thesis will start with an introduction of basic structure of IEEE 802 22 Then the self-coexistence mechanism and resource allocation issues will be discussed Two mechanisms called “Frame Reuse Allocation (FRA)” and “Dynamic Resource Block Reuse (DRBR)” are proposed which are the main contribution of this thesis The FRA mechanism can be used when multiple adjacent base stations operating on the same channel FRA mechanism is proposed in the distributed and centralized way Both of the ways try to reuse a same frame in multiple cells that are not adjacent with each other Their advantages and disadvantages as well as their trade-offs will be discussed The performance analysis and simulation results show that FRA mechanism can be used to increase the number of frame usage and address the forced disconnection problems which will decrease the QoS The DRBR mechanism is proposed to overcome the deficiencies of FRA mechanism DRBR mechanism can be used when multiple adjacent base stations operating on different channels DRBR allows an unused resource block can be used by multiple cells that are not adjacent with each other Its advantages and disadvantages as well as the trade-offs will be discussed The performance analysis and simulation results show that DRBR mechanism can increase a cell throughput without changing the original system structure Besides the overhead cost in resources allocation is reduced and the process in resource releasing is simplify DRBR mechanism can also response to different traffic situations according to the blocking rate of different base stations

Date of Award	2014 Jul 30
Original language	English
Supervisor	Hsiao-Hwa Chen (Supervisor)