High performance AWGR PONs in data centre networks

Abstract

The unprecedented advances in Passive Optical Networks (PONs) and their proven performance in access networks have encouraged researcher to investigate the use of passive optics to address the limitations of conventional data centre architectures. In this paper, we present a scalable, high capacity and energy efficient arrayed wave guide grating router (AWGR) PON based data centre architecture to facilitate inter and intra racks communication within data centres. The proposed architecture can be scaled up efficiently to hundreds of thousands of servers and has shown energy savings of 45% and 80% compared to the Fat-Tree and BCube architectures, respectively.

Mathematical Optimization Modelling for Fast-Switched and Delay Minimized Scheduling for Intra-Cell Communication in an AWGR-Based PON Data Center

“…The PON cell fabric interconnection is designed to be flexible to accommodate any number of PON groups through mathematical model that solves for topology physical interconnection and the wavelength routing and assignment within the cell [9]. The third part of the network is the optical switch (OLT An OLT chassis therefore can accommodate a total of 256 AM ports and hence connect a maximum of 256 PON group.…”

“…We have proposed, compared, and patented five novel designs relaying mostly on PONs to handle intra and inter rack communications [2]. In [9], we have shown that the AWGR-based PON architecture can be scaled up efficiently to hundreds of thousands of servers and have shown energy savings of 45% and 80% compared to the Fat-Tree [10] and BCube [11] architectures respectively. In [12] a Software Defined Network (SDN) based AWGR based PON data center architecture was introduced.…”

“…In this paper, further investigation is carried on the AWGR PON architecture design presented in [9] to design a protocol through a centralized scheduler capable of coordinating channel access arbitration and bandwidth allocation for intra PON cell communication. The work is based on development of Mixed Integer Linear Programming (MILP) optimization mathematical model for energy-efficient and minimized delay scheduling examining different traffic patterns such as random and unbalanced traffic with hot spot.…”

“…The work in [13] demonstrated the optimization mathematical results for minimizing the power consumption of a PON cell through efficient placement of Virtual Machines (VM). In [14], further investigation of the design presented in [9] and [12] is carried. The work tackled the problem of resource provisioning optimization for cloud applications addressing delay and non-delay sensitive applications.…”

On the Architecture and Design of Multi-Wavelength Passive Optical Arrayed Waveguide Grating Routers

“…AWGs are also found in many data center designs to mainly address major concerns raised about the power consumption of IT devices and its impact on global warming in the first place and on the electricity bill in the second place [3]. Such data center architecture designs are promoted and proposed in [4]…”