Centralized vs. Decentralized Bandwidth Allocation for Supporting Green Fog Integration in Next-Generation Optical Access Networks

2020 ◽  
Vol 58 (5) ◽  
pp. 33-39 ◽  
Author(s):  
Ahmed Helmy ◽  
Amiya Nayak
Keyword(s):  
Bandwidth Allocation ◽  
Access Networks ◽  
Optical Access Networks ◽  
Next Generation ◽  
Optical Access

Design and implementation of flexible TWDM-PON with PtP WDM overlay based on WSS for next-generation optical access networks

2016 ◽  
Vol 30 (25) ◽  
pp. 1650324
Author(s):  
Bin Wu ◽  
Hongxi Yin ◽  
Jie Qin ◽  
Chang Liu ◽  
Anliang Liu ◽  
...  
Keyword(s):  
Wavelength Division Multiplexing ◽  
Bandwidth Allocation ◽  
Access Networks ◽  
Passive Optical Network ◽  
Optical Access Networks ◽  
Next Generation ◽  
Optical Access ◽  
Wavelength Division ◽  
Point To Point ◽  
Wdm Pon

Aiming at the increasing demand of the diversification services and flexible bandwidth allocation of the future access networks, a flexible passive optical network (PON) scheme combining time and wavelength division multiplexing (TWDM) with point-to-point wavelength division multiplexing (PtP WDM) overlay is proposed for the next-generation optical access networks in this paper. A novel software-defined optical distribution network (ODN) structure is designed based on wavelength selective switches (WSS), which can implement wavelength and bandwidth dynamical allocations and suits for the bursty traffic. The experimental results reveal that the TWDM-PON can provide 40 Gb/s downstream and 10 Gb/s upstream data transmission, while the PtP WDM-PON can support 10 GHz point-to-point dedicated bandwidth as the overlay complement system. The wavelengths of the TWDM-PON and PtP WDM-PON are allocated dynamically based on WSS, which verifies the feasibility of the proposed structure.

scholarly journals An Energy-Efficient Distributed Dynamic Bandwidth Allocation Algorithm for Passive Optical Access Networks

2020 ◽  
Vol 12 (6) ◽  
pp. 2264 ◽  
Author(s):  
Hamzeh Khalili ◽  
David Rincón ◽  
Sebastià Sallent ◽  
José Ramón Piney
Keyword(s):  
Energy Consumption ◽  
Energy Efficient ◽  
Bandwidth Allocation ◽  
Access Networks ◽  
Dynamic Bandwidth Allocation ◽  
Sleep Mode ◽  
Optical Access Networks ◽  
Optical Access ◽  
Wide Range ◽  
Dynamic Bandwidth

The rapid deployment of passive optical access networks (PONs) increases the global energy consumption of networking infrastructure. This paper focuses on the minimization of energy consumption in Ethernet PONs (EPONs). We present an energy-efficient, distributed dynamic bandwidth allocation (DBA) algorithm able to power off the transmitter and receiver of an optical network unit (ONU) when there is no upstream or downstream traffic. Our main contribution is combining the advantages of a distributed DBA (namely, a smaller packet delay compared to centralized DBAs, due to less time being needed to allocate the transmission slot) with energy saving features (that come at a price of longer delays due to the longer queue waiting times when transmitters are switched off). The proposed algorithm analyzes the queue size of the ONUs in order to switch them to doze/sleep mode when there is no upstream/downstream traffic in the network, respectively. Our results show that we minimized the ONU energy consumption across a wide range of network loads while keeping delay bounded.

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