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008			071203s2007 th uu|m rtt 0| a1eng d
035			_a.b12025665
099		9	_aAIT Thesis no.TC-07-5
100	0		_aNguyen Chi Quang
245	1	0	_aDynamic resource allocation for WiMAX systems
260			_aPathum Thani, Thailand : _bAsian Institute of Technology, _c2007
300			_a56 leaves : _bill.
490	1		_aThesis ; _vno. TC-07-5
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Telecommunications
502			_aThesis (M.Eng.) - Asian Institute of Technology, 2007
520			_aIEEE 802.16 standard, often preferred as WiMAX, uses OFDMA access technique to transfer high data rates. The standard offers flexible bandwidth and different modulation and coding schemes (QPSK, 16QAM, 64QAM) to enable WiMAX systems to adaptively change the speed and capacity of the wireless connection based on the demand. The Radio Link Control should provide dynamic changing of UL and DL burst profiles on a per-connection and per-frame basis, depending on radio channel characteristics and QoS requirements. This thesis proposes dynamic resource allocation schemes for WiMAX systems (employing OFDMA physical layer option) in both Uplink and Downlink in which we can dynamically allocate bandwidth for different kind of services with different priorities; every subscriber station can flexibly download and upload data using the best modulation and coding scheme for each Sub-Channel. Network Simulator 2 is employed to simulate these schedulers and the results show that the throughput for both Uplink and Downlink can be improved much (even in the case the radio conditions vary a lot) when applying these allocation mechanisms and the average delays still satisfy the delay critical of all services
650		0	_aIEEE 802.16 (Standard)
650		0	_aOrthogonal frequency division multiplexing
700	0		_aPoompat Saengudomlert, _eChairperson
700	1		_aRajatheva, R.M.A.P, _eExamination Committee
700	1		_aErke, Tapio J., _eExamination Committee
710	2		_aProject 300, Vietnam, _eScholarship Donor
710	2		_aAsian Institute of Technology Fellowship, _eScholarship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. TC-07-5
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