Waveband switching in WDM mesh networks with static traffic | |
| Author | Wiwat Matphon |
| Call Number | AIT RSPR no.TC-09-01 |
| Subject(s) | Wablength division multiplexing Telecommunication--Switching systems |
| Note | Submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Telecommunications, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Research studies project report ; no. TC-09-01 |
| Abstract | An optical fiber is an attractive choice for transmission media because it can support traffic up to 1 Tbps per fiber. Traffic demands in the network are currently growing. Although optical fibers have enough transmission capacities to support the traffic, the limitation on electronic processing speed prevents the use of a fiber as a single high-speed transmission channel. This limitation can be overcome by the wavelength division multiplexing (WDM) technique, this technique split the fiber bandwidth into a lot of wavelength channels. As the number of WDM channels grows large, there is a need of switches with high port counts, e.g., 1000. Even with the use of optical switching as well as electronic switching, such large switches cannot be easily constructed in practice. In this research, we investigate the benefits of waveband switching (WBS) in reducing the number of port counts at switching nodes. With WBS, multiple wavelengths are combined into a wavelength band and switched via a common port. We compare the total number of switch ports used in different network scenarios under WBS and under conventional wavelength switching (WS). In particular, we vary the network topologies and the amount of traffic demands in our investigation. To use WBS, algorithms for traffic routing and lightpath groping are needed. In this research, we focus on two routing strategies based on the Dijkstra algorithm and the Steiner trees. For lightpath grouping, we consider the same-source grouping strategy and the end-to-end grouping strategy. Computer simulations are conducted using MATLAB to quantify the number of switch ports required for WBS and WS to support randomly generated static traffic. Simulation results demonstrate the reductions in the number of switch ports due to WBS in general, although the significance of the reduction depends on the network scenarios. It is observed that, as the network size and the amount of traffic increase, the benefits of WBS become more significant. |
| Year | 2009 |
| Corresponding Series Added Entry | Asian Institute of Technology. Research studies project report ; no. TC-09-01 |
| Type | Research Study Project Report (RSPR) |
| 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) | Erke, Tapio J.;Teerapat Sanguankotchakorn |
| Scholarship Donor(s) | Royal Thai Navy |
| Degree | Research studies project report (M.Eng.) - Asian Institute of Technology, 2009 |