The currently deployed fixed-grid Wavelength Division Multiplexing (WDM) technology is
expected to be replaced by the more dynamic flex-grid WDM, which requires advanced …

Migration of optical connections in flex-grid networks has become increasingly necessary as
the arrivals and departures of optical connection requests are more dynamic. To mitigate …

Spectrum fragmentation is one of the main drawbacks of Flex-Grid Optical Networks, and it
becomes especially harmful under dynamic traffic conditions. When evolving from single …

In this paper we propose a spectrum defragmentation algorithm applicable to fixed-grid and
flex-grid wavelength division multiplexing (WDM) optical networks. The algorithm is …

In flexi-grid optical networks, fragmentation of spectrum resources may significantly affect the
overall network efficiency. Effective techniques for defragmentation (ie, re-optimization) are …

The presence of dynamic traffic in optical networks can lead to spectrum fragmentation,
which significantly reduce the network performance. This problem is exacerbated in flexible …

This paper discusses the technical feasibility and network-level potential of defragmentation
as a means of extending the capacity of optical transport networks. An experimental setup …

Flex-grid optical network is a promising solution to meet the ever increasing varied traffic
demands by virtue of its capability to efficiently utilize the limited spectral resources in fiber …

This paper evaluates Spatial Division Multiplexing in Elastic Optical Network (SDM-EON)
defragmentation scenarios and applies a combined push-pull and fast-switching …

Flexi-grid technology has emerged as the evolution of fixed-grid DWDM core optical
networks, enabling more efficient utilization of spectral resources and leading to higher …