TY  - SER
AU  - Nguyen Van Nhan
AU  - Poompat Saengudomlert,
AU  - Teerapat Sanguankotchakorn,
AU  - Rajatheva,R.M.A.P
ED  - Electricity of Vietnam (EVN), 
TI  - Amplifier placement for metropolitan WDM ring networks supporting different traffic demands
T2  - Thesis
PY  - 2010///
CY  - Pathum Thani, Thailand
PB  - Asian Institute of Technology
KW  - Wavelength division multiplexing
N1  - A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Telecommunications, School of Engineering and Technology; Thesis (M.Eng.) - Asian Institute of Technology, 2010
N2  - To 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
UR  - http://203.159.5.9/ait-thesis/detail.php?q=B04079 
ER  -