In the last decade, the bit rates achieved on fiber broadband networks have increased multiple times, and every new generation of passive optical network (PON) technologies must unlock more of fiber’s potential and must be backward compatible to ...

Due to high spectral efficiency and flexibility of orthogonal frequency division multiplexing (OFDM) technology, OFDM-based optical grids/clouds are fast replacing WDM grids/clouds. As grids and clouds process data intensive tasks, protection of ...

A fine-grained, flexible frequency grid of elastic optical transmission and space division multiplexing (SDM) in conjunction with spectrally efficient modulations is an ideal solution for the impending capacity crunch. The routing, modulation, ...

In a dynamically reconfigurable wide-area translucent network, the pre-deployment of regenerators at few sites has its advantages due to the increased system optimization and incurred savings in capital/operational expenditure (CAPEX/OPEX). A node’...

The wireless ultraviolet (UV) communication can be applied to assist unmanned aerial vehicles (UAVs) to complete cooperative reconnaissance, combat, defense and other tasks in the complex environment. This paper focuses on the topology ...

When circuits are set up and dismantled dynamically in elastic optical networks, the link spectrum becomes fragmented. The fragmentation limits the available path choices and may lead to significant blocking of connection requests. The ...

A novel architecture with point-to-multipoint direct communication (P2MPDC) between any two optical network units (ONUs) for data center is proposed in the paper. By designing transceiver module (TM) ingeniously, the architecture is finished to ...

Elastic Optical Networks (EON) have recently attracts researchers, as one of the most promising technologies for flexibly assign spectrum resources to link requests,and benefits from higher spectral efficiency and system capacity. The spectrum ...

With the success of commercial spaceflights, space information infrastructure (SII) has received much attention in recent years. Blueprints such as the low earth orbit global communication network and the data center in space have been proposed. ...

The current generation optical networks are evolving as transparent networks by implementing all optical components like OXCs, OADMs, etc., and hence, minimizing the network operational cost. The routing and wavelength assignment is the major ...

Visible light communication (VLC) network is an appropriate solution to meet the 5G and 6G. It can overcome the spectrum scarcity and capacity in the radio frequency (RF) networks. This network faces some challenges. Obstacles can break links and ...

Resources of Passive Optical Networks (PONs) can be shared by a diverse spectrum of customers such as residential users, business subscribers, mobile network operators, and service providers. A PON customer can rent one or several Optical Network ...

Access Networks based on Passive Optical Network (PON) technology can offer transport services to broadband service providers, such as mobile backhauling/fronthauling for Mobile Network Operators and multi-ONU Service Level Agreements for Virtual ...

In this paper, we analyze and compare the use and benefits of several combining schemes to create diversity at the optical receiver in a multi-cell indoor Visible Light Communication (VLC) system. Furthermore, its implementation in a pyramidal ...

Underground mining (UM) is an industry worldwide known for its hostile work environment; therefore, a proper communication system is essential to preserve the miners’ safety. However, the irregular features of UM tunnels as well as their ...

This paper addresses the problem of minimizing total slot idle time in assigning spectrum to a 2-class traffic, considering both incremental and dynamic arrival and permanence rules. Deadlock avoidance under incremental traffic is first shown to ...

In recent years, cloud data centers have received increased attention by the research community, due to their key function of hosting a big number of cloud applications and services. At the same time, however, various and conflicting requirements ...

Elastic optical networks allow for a division of the optical spectrum into frequency slots, which can be combined to create channels with bandwidth defined by demand. Their flexibility provides greater spectral efficiency when compared with ...

In this paper, a novel energy-aware grooming-based algorithm, named energy minimization algorithm (EMA), is proposed that aims at providing the quality of service requirements in elastic optical networks in terms of network energy efficiency and ...

Radio frequency (RF) spectrum is already dense enough and hard to add more broadband channels to meet the current user demands. Optical free-space communications could be an excellent alternative to the RF communications system, and it provides ...