High Performance AWGR PONs in Data Centre Networks

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

A novel optical storage area network implemented in a metro WDM setting

This paper presents a review of various optical storage area network (SAN) related technologies. It reviews recent developments in SAN technologies. It also reviews the recent developments in metro wavelength division multiplexing (WDM) networks. The paper proposes metro WDM networks technologies for storage area networking. It presents analysis and simulation results of a proposed architecture of SANs based on metro WDM technologies. Throughput, delay and packet dropping probability results are presented under Poisson and self-similar traffic

WDM metropolitan sectioned ring for Storage Area Networks extension with symmetrical and asymmetrical traffic

As storage area networks (SANs) are increasingly replacing traditional direct-attached storage (DAS) in many large data centers, many studies are considering extending SANs over large distances. SANs in a metropolitan wavelength-division multiplexing (WDM) scenario create asymmetrical traffic and hot-node scenarios. This paper proposes a sectioned WDM metropolitan ring network as a suitable extension for SANs. Two node architectures are considered, one uses two fixed transmitters and the other uses a tuneable transmitter. A tunable receiver is used with both architectures. For the two fixed-transmitters node architecture, two versions of medium access control (MAC) protocol are introduced. Simulation is carried out under both symmetrical and asymmetrical traffic sources. Performance of the sectioned ring is compared with that of the SAN ring network architecture proposed in [1]