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035			_a.b12090438
099		9	_aAIT Thesis no.TC-10-09
100	0		_aNguyen Van Nhan
245	1	0	_aAmplifier placement for metropolitan WDM ring networks supporting different traffic demands
260			_aPathum Thani, Thailand : _bAsian Institute of Technology, _c2010
300			_a64 leaves : _bill.
490	1		_aThesis ; _vno. TC-10-09
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Telecommunications, School of Engineering and Technology
520			_aTo increase the efficiency and decrease the cost of WDM networks,one important approach is optimization of optical amplifier placement. Considering the traffic change in the networkin terms of a given set of traffic matrices for different times of day, this thesis exploresseveral methods to find the minimum number ofamplifiers and their associated locations in metropolitan WDM rings. In order to handle thetraffic changes, we consider two methods tosolve the optimization problem: using a combinedtraffic matrixand using multiple sets of constraints. The procedure to solve each optimization problem includes routing andwavelength assignment (RWA) and linear approximation of non-linear constraints. The amplifier placement problem is formulated as a mixed integer linear programming (MILP) problem in unidirectional and bidirectional WDM rings. In addition, we consider the self-healing property of bidirectional WDM rings in case of a single link failure. Numerical results from optimization are obtained using the commercial software CPLEX. Compared to previous works on optical amplifier placement in metropolitan WDM rings, this thesis provides additional procedures to take into account traffic changes as well as the bidirectionalityin RWA.
502			_aThesis (M.Eng.) - Asian Institute of Technology, 2010
650		0	_aWavelength division multiplexing
700	0		_aPoompat Saengudomlert, _eChairperson
700	0		_aTeerapat Sanguankotchakorn, _eExamination Committee
700	1		_aRajatheva, R.M.A.P, _eExamination Committee
710	2		_aElectricity of Vietnam (EVN), _eScholarship donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. TC-10-09
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B04079
907			_a.b12090438 _bmnait _cu
902			_a240402
998			_b0 _c110219 _dm _ea _fu _g0
962			_a000:001:PDF:b1209043:000463:0:0:0:0:0:0 _tAbstract-AIT Thesis no.TC-10-09 _vn
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