Fragmentation-Minimized Periodic Network-Bandwidth Expansion Employing Aligned Channel Slot Allocation in Flexible Grid Optical Networks
- Resource Type
- Journal Article
- Authors
- Hiroshi HASEGAWA; Ken-ichi SATO; Takuma YASUDA; Yojiro MORI
- Source
- IEICE Transactions on Communications. 2021, E104.B(12):1514
- Subject
- fragment mitigation
periodic network upgrade
semi-flexible grid
- Language
- English
- ISSN
- 0916-8516
1745-1345
We propose an efficient network upgrade and expansion method that can make the most of the next generation channel resources to accommodate further increases in traffic. Semi-flexible grid configuration and two cost metrics are introduced to establish a regularity in frequency assignment and minimize disturbance in the upgrade process; both reduce the fragmentation in frequency assignment and the number of fibers necessary. Various investigations of different configurations elucidate that the number of fibers necessary is reduced about 10-15% for any combination of upgrade scenario, channel frequency bandwidth, and topology adopted.