Capacity provisioning in WDM networks with traffic grooming and optical bypass | |
| Author | Pratkasem Vesarach |
| Call Number | AIT Diss no.TC-11-01 |
| Subject(s) | Wavelength division multiplexing Optical communications Multiplexing |
| Note | A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Telecommunications, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Dissertation ; no. TC-11-01 |
| Abstract | Due to the increasing bandwidth requirements from Internet applications, wave- length division multiplexing (WDM) networks are required as backbone networks to support the increasing traffic. However, WDM network equipment are expensive. Thus, it is preferable for service providers to keep the network cost low while sup- porting the traffic demands. It is widely assumed in several research literatures that the cost of electronic switching modules is the dominating cost. There are two tech- niques that can be used to reduce the number of required electronic switch ports: traffic grooming and optical bypass. The node architecture that has both capabilities is called the hybrid switching node architecture. Based on the hybrid switching node architecture, the problem on how to allocate network resources such that the number of established electronic switch ports is minimized while all traffic demands are supported, is investigated in this dissertation. We propose two solution approaches: optimization and heuristic. Both approaches have their own advantages and disadvantages. While the optimization approaches provide good computational results, they require large computational resources. On the other hand, the heuristic approaches require small computational resources. However, the quality of the results is not at good as for the optimization approaches. Because the lightpath assignment heuristic requires small computational time, it is used as a tool to observe the switch port allocation behavior. The simulation results show that there is a strong correlation between the node degree and the node location, to the number of established optical switch ports. Also, there is a strong correlation between the amount of originate and designate traffic to the number of established electronic switch ports. In particular, when traffic inside the network is small, there is a large number of surplus electronic switch ports. However, when the traffic increases, this number of excess electronic switch ports decreases. |
| Year | 2011 |
| Corresponding Series Added Entry | Asian Institute of Technology. Dissertation ; no. TC-11-01 |
| Type | Dissertation |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Telecommunications (TC) |
| Chairperson(s) | Poompat Saengudomlert; |
| Examination Committee(s) | Kanchana Kanchanasut ;Teerapat Sangguankotchakorn ;Youn, Chan-Hyun; |
| Scholarship Donor(s) | RTG Fellowship |
| Degree | Thesis (Ph.D.) - Asian Institute of Technology, 2011 |