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Tremendous volumes generated by big data applications are starting to overwhelm data centers and networks. Traditional research efforts have determined how to process these vast volumes of data inside datacenters. Nevertheless, slight attention has addressed the increase in power consumption resulting from transferring these gigantic volumes of data from the source to destination (datacenters). An...
In this paper, we present our results on tackling the oversubscription issue in the inter-cell communication in the Arrayed Waveguide PON based data center architecture proposed in our recent work. We enhance the bandwidth allocation by introducing 2-tiers of AWGRs to facilitate multipath routing and energy-efficient utilisation of resources. We also employ a centralized Software Defined Network (SDN)...
The introduction of the Common Public Radio Interface (CPRI) technology allows for a centralization in Base Bandwidth Unit (BBU) of some access functions with advantages in terms of power consumption saving when switching off algorithms are implemented. Unfortunately the advantages of the CPRI technology is to be paid with an increase in bandwidth to be carried between the BBU and the Radio Remote...
Optically switched networks have potential for high scalability, low power-consumption and increased bandwidth capacity and are considered a promising solution to overcome the bottlenecks in traditional Data Center Networks (DCNs) powered by electronic switches. Even though the major share of power consumption occurs in the edge tier, most of the proposals for future DCNs have concentrated on optical...
Over the last decade, the evolution of data center architecture designs has been mainly driven by the ever increasing bandwidth demands, high power consumption and cost. With all these in mind, a significant potential to improve bandwidth capacity and reduce power consumption and cost can be achieved by introducing PONs in the design of the networking fabric infrastructure in data centers. This work...
Deployment of PCE (Path Computation Element) architecture in high-speed MPLS/GMPLS networks is at present widely accepted and helps to run path setup operations for applications with explicitly defined objective functions and also with QoS requirements. The paper reports on recent research investigations with PCE-based path computation employing 3-layer traffic engineering (TE) system: PCE module...
We analyze the recently proposed Extended Passive-Optical-Pod Interconnect (e-POPI), designed for small energy-aware data centers, including server-turn-on/off strategies. We investigate several options to increase up to 56 Gbit/s the bit rate of e-POPI's links by the use of Pulse Amplitude Modulation (4 or 8 PAM) considering three types of receivers (including SOA-PIN). The maximum number of connected...
This paper introduces cross-stratum orchestration architecture that is aimed to support an end-to-end orchestration of application services. This paper then expands the concept of CSO as a viable architecture and discusses issues and requirements for two challenging use cases: game server dynamic VM mobility and 5G Transport (5GT).
5G is currently being investigated and defined while Time-Wavelength Division Multiplexed Passive Optical Networks (TWDM-PONs) and Digital Broadcasting Systems (DBS) are respectively standardised and deployed. Software Defined Networking (SDN) can provide reconfigurability, the stringent latency requirements, adaptive network functionality, and the Quality of Experience (QoE) that a heterogeneous...
This article introduces an energy efficient heuristic that performs resource provisioning and Virtual Machine (VM) migration in the Disaggregated Server (DS) schema. The DS is a promising paradigm for future data centers where servers' components are disaggregated at the hardware unit levels and resources of similar type are combined in type respective pools, such as processing pools, memory pools...
Current multi-tier and over provision Data Centre Network (DCN) architectures with significant cost, complexity, and power consumption are unable to provide adequate throughput and performance according to the increasing traffic growth and IT demands. In response to these identified limitations, this paper proposes a new DCN architecture featuring all-optical switching technologies using both Optical...
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