| Author | Napaamporn, Mes |
| Note | research study submitted in partial fulfillment of requirements
for the degree of Master of Engineering in Information & Communications Technologies, School of Engineering and Technologies |
| Publisher | Asian Institute of Technology |
| Abstract | Traditionally, the main focus for optical transmissions in wavelength division multiplexing (WDM)
networks has been on how to increase the transmission rates. However, there is currently strong
interest in green communications, which includes operating communication networks with high
energy efficiency. This research investigates the problem of energy efficient routing and wavelength
assignment (RWA) in a WDM network taking into consideration the optical reach, which is the
maximum physical transmission distance of a lightpath. The energy efficient RWA problem under
consideration is formulated as an integer linear programming (ILP) problem whose objective is to
minimize the energy consumption for supporting a given set of traffic demands. The ILP problem is
solved using the Python programming language with the PuLP package for random traffic scenarios
in ring, grid, and mesh topologies. Simulation results from different network and traffic scenarios are
compared, with special attention to how the optical reach affects the overall energy consumption. The
results indicate that a longer optical reach does not necessarily lead to a lower energy consumption by
the network when the associated energy consumption of a switch port increases with the optical reach. |
| Year | 2012 |
| Type | Research Study Project Report (RSPR) |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Information and Communication Technology (ICT) |
| Chairperson(s) | Poompat Saengudomlert; |
| Examination Committee(s) | Ahmed, Kazi M. ;Teerapat Sanguankotchakorn; |
| Scholarship Donor(s) | Royal Thai Government; |