http://www.cs.unibo.it/~montesi/CBD/Articoli/SurvyBigData2.pdf

Data-intensive applications, challenges, techniques and technologies: A survey on Big Data

The Grid 2: Blueprint for a New Computing Infrastructure

To support bursty traffic on the Internet (and especially WWW) efficiently, optical burst switching (OBS) is proposed as a way to streamline both protocols and hardware in building the future gener...

Optical burst switching (OBS) - a new paradigm for an optical Internet

This work presents an estimation of the global electricity usage that can be ascribed to Communication Technology (CT) between 2010 and 2030. The scope is three scenarios for use and production of consumer devices, communication networks and data centers. Three different scenarios, best, expected, and worst, are set up, which include annual numbers of sold devices, data traffic and electricity intensities/efficiencies. The most significant trend, regardless of scenario, is that the proportion of use-stage electricity by consumer devices will decrease and will be transferred to the networks and data centers. Still, it seems like wireless access networks will not be the main driver for electricity use. The analysis shows that for the worst-case scenario, CT could use as much as 51% of global electricity in 2030. This will happen if not enough improvement in electricity efficiency of wireless access networks and fixed access networks/data centers is possible. However, until 2030, globally-generated renewable electricity is likely to exceed the electricity demand of all networks and data centers. Nevertheless, the present investigation suggests, for the worst-case scenario, that CT electricity usage could contribute up to 23% of the globally released greenhouse gas emissions in 2030.

/pdf/on-global-electricity-usage-of-communication-technology-3s4ck5m1i1.pdf

On Global Electricity Usage of Communication Technology: Trends to 2030

The current fast-growing Internet traffic is demanding more and more network capacity every day. The concept of wavelength-division multiplexing has provided us an opportunity to multiply network capacity. Current optical switching technologies allow us to rapidly deliver the enormous bandwidth of WDM networks. Photonic packet switching offers high-speed, data rate/format transparency, and configurability, which are some of the important characteristics needed in future networks supporting different forms of data. In this article we present some of the critical issues involved in designing and implementing all-optical packet-switched networks.

Advances in photonic packet switching: an overview

An optical packet switching scheme based on a fast electronically controllable tunable laser dual-pump four-wave mixing for wavelength conversion and an N/spl times/N arrayed waveguide grating for passive routing is examined. This scheme can realize ultrafast packet switching and large port switch fabrication, required in next-generation core optical packet routers. The performance is examined in terms of packet-based bit-error-rate measurements for packet-by-packet switching. Design issues are also discussed.

Fast and widely tunable optical packet switching scheme based on tunable laser and dual-pump four-wave mixing

This paper presents an application-aware asynchronous optical burst switched network demonstrator. Fully functional edge and core routers as well as a novel resource discovery signalling protocol is being demonstrated.

A Fully Functional Application-aware Optical Burst Switched Network Test-bed

WDM systems are maturing and are in use in real point-to-point applications. The technology has also become of interest in the development of all-optical networks, and in this context the performance of WDM can be more critical. In some networks, multiple-access demands that a large number of channels be deployed over long distances, and in these cases the performance of WDM may be degraded by crosstalk arising from fiber nonlinearity. Other problems arise from non-ideal components such as optical amplifiers, switches, and multiplexers/demultiplexers, Much activity in WDM has been understanding its limitations and improving component performance, Some of the limitations imposed may be overcome by the use of OTDM, and research in this area continues to be of interest and importance. However, OTDM is less mature, and much activity is concerned with the realization of robust subsystems such as sources and demultiplexers. It is likely that in the longer term networks will employ a combination of WDM and OTDM.

Optical multiplexing in fiber networks: progress in WDM and OTDM

The intrinsic scalability limitations of traditional centralised network management (NM) become significantly more pronounced when transfers of bulk network monitoring data are considered. This fact has encouraged a trend towards distributed management intelligence, which promises more flexible and scalable solutions. However, distributed mobile agent (MA) based NM architectures reported in the literature do not adequately address scalability problems when considering data-intensive NM applications. In this paper, we present three novel applications in which MA are used to perform management data aggregation, acquire SNMP table snapshots and filter SNMP table contents subject to filtering expressions. Both real-time and off-line NM data acquisition is considered. The applications, supported by a lightweight management framework described in previous work, are shown to outperform SNMP-based polling in terms of bandwidth consumption.

Enabling mobile agent technology for intelligent bulk management data filtering

This paper presents the outcomes of the optical packet switching over wavelength routed network (OPORON) project, which demonstrated an asynchronous end-to-end optical packet switched network. Several novel techniques and subsystems for optical packet-switched network are analyzed and described in details, and their functionalities are validated through a demonstrator. The demonstrated network comprises two wavelength agile edge routers with traffic-shaping capabilities, a fully controlled core router with wavelength conversion (WC) capability, and a control plane. The OPORON edge router incorporates a novel traffic aggregation method, asynchronous optical packet transceiver, and agile wavelength allocation mechanism. The OPORON core router is based on the WC and selection architecture. It utilizes a semiconductor optical-amplifier-based Mach-Zehnder interferometer wavelength converter, in combination with an agile tunable wavelength source and an arrayed waveguide grating, for performing packet switching. The core router also utilizes an advanced and fully controllable mechanism for the packet switch control, which is implemented on field programmable gate array technology. Finally, the integration of the aforementioned subsystems is discussed, and the results of a complete and end-to-end asynchronous and variable length optical packet-switched demonstrator are presented.

Mike J. O'Mahony

Papers

Fast and widely tunable optical packet switching scheme based on tunable laser and dual-pump four-wave mixing

A Fully Functional Application-aware Optical Burst Switched Network Test-bed

Optical multiplexing in fiber networks: progress in WDM and OTDM

Enabling mobile agent technology for intelligent bulk management data filtering

The “OPORON” Project: Demonstration of a Fully Functional End-to-End Asynchronous Optical Packet-Switched Network