Orthogonal frequency-division multiplexing (OFDM) is a modulation technology that has
been widely adopted in many new and emerging broadband wireless and wireline …

Rigid fixed-grid wavelength division multiplexing (WDM) optical networks can no longer
keep up with the emerging bandwidth-hungry and highly dynamic services in an efficient …

In recent years, OFDM has been the focus of extensive research efforts in optical
transmission and networking, initially as a means to overcome physical impairments in …

The continual growth of Internet traffic necessitates a high-capacity transmission platform
and also highlights the importance of a multi-granularity transport network due to the flexible …

Elastic flexgrid optical networks (FG-ON) are considered a very promising solution for next-
generation optical networks. In this article we focus on lightpath adaptation under variable …

In this paper, we present a quality-of-transmission (QoT) aware dynamic routing, modulation
level, and spectrum assignment scheme referred to as QoT-aware RSA. The proposed QoT …

Elastic optical networks (EONs) enable network operators to have agile bandwidth
management in the optical layer. In this paper, we investigate dynamic and adaptive …

Spectrum elastic optical networks support flexible central frequency and spectrum
assignment for lightpaths. When provisioning a new connection in an elastic optical network …

As the Internet traffic grows, the energy efficiency gains more attention as a design factor for
the planning and operation of telecommunication networks. This paper is devoted to the …

Compared to traditional wavelength division multiplexing (WDM) networks, orthogonal
frequency division multiplexing (OFDM)-based flexible optical networks provide better …