Optical Burst Switching (original) (raw)

Optical burst switching: a new area in optical networking research

IEEE Network, 2004

In this tutorial, we give an introduction to optical burst switching (OBS) and compare it with other existing optical switching paradigms. Basic burst assembly algorithms and their effect on assembled burst traffic characteristics are described first. Then a brief review of the early work on burst transmission is provided followed by the description of a prevailing protocol for OBS networks called Just-Enough-Time (JET). Algorithms used at an OBS core node for burst scheduling as well as contention resolution strategies are presented next. Tradeoffs between their performance and implementation complexities are discussed. Recent work on QoS support, IP/WDM multicast, TCP performance in OBS networks and Labelled OBS is also described, and several open issues are mentioned. Hereafter, we will use the terms channel and wavelength (or λ) interchangeably.

OPS or OBS in the Core Network? -A Comparison of Optical Packet-and Optical Burst Switching

Optical Packet Switching (OPS) and Optical Burst Switching (OBS) are optically switched networks architectures aiming to serve higher layer packetbased communication protocols. This paper gives a rationale for introducing these switching schemes in telecommunication networks, and discusses transparency and channel count in the context of contention resolution. Focusing on asynchronous operation with variable length optical packets/bursts, we review the latest work on OPS and OBS designs, contention resolution methods and OBS reservation mechanisms. The performance of both OPS and OBS is reviewed and held up against design complexity.

Node architectures for optical packet and burst switching

2002

Optical Packet Switching (OPS) and Optical Burst Switching (OBS) are optical networking concepts based on fully exploiting fast dynamic allocation of (D)WDM channels. Compared to more static approaches focussing on providing end-toend optical channels, OPS and OBS aim at providing greater bandwidth efficiency, granularity and flexibility. In this paper we give an overview of the issues arising when designing an optical switch for either OPS or OBS, including packet formats, contention resolution techniques, and switching fabrics.

Choices, Features and Issues in Optical Burst Switching

1999

In this article, we first explore design choices in burst-switching and describe a new variation that is especially suitable for optical WDM networks. We then identify main features of optical burst switching (OBS), discuss major differences and similarities between OBS and optical circuit-and packet-switching, and address important QoS related performance issues in OBS. The term "switches" will be used broadly to refer to cross-connects, routers, add-drop-multiplexers etc. as well.

Comparing Optical Packet Switching And Optical Burst Switching

Daffodil International University Journal of Science and Technology, 1970

The switching is an important part of the telecommunication networks over the years for transferring and handling voice and data through the traditional switching nodes existing in the telecommunication networks. Various developments were seen in the recent years which resulted in increasing data transfer capabilities of the transmission networks all over the world, however the switching speed and techniques are still remained unchanged in most of the cases that neither match the data transfer capacities nor the expanding demand of the networks in the near future. Some switching technologies are still in the developing stage, of them two are more obvious: Optical Packet Switching (OPS) and Optical Burst Switching (OBS). In this paper, I tried to compare different paradigm of these two main developments, keeping in mind that the OPS would see rapid development in the near future than the OBS, though OBS would the ultimate solution of switching for the bulk volume of telephone and dat...

Performance Issues in Optical Burst/Packet Switching

Lecture Notes in Computer Science, 2009

This chapter summarises the activities on optical packet switching (OPS) and optical burst switching (OBS) carried out by the COST 291 partners in the last 4 years. It consists of an introduction, five sections with contributions on five different specific topics, and a final section dedicated to the conclusions. Each section contains an introductive state-of-the-art description of the specific topic and at least one contribution on that topic. The conclusions give some points on the current situation of the OPS/OBS paradigms.

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

Journal of high speed networks, 1999

To support bursty tra c on the Internet (and especially WWW) e ciently, optical burst switching (OBS) is proposed as a way to streamline both protocol and hardware in building the future generation Optical Internet. By leveraging the attractive properties of optical communications and at the same time, taking into account its limitations, OBS combines the best of optical circuitswitching and packet/cell switching. In this paper, the general concept of OBS protocols and in particular, those based on Just-Enough-Time (JET), is described, along with the applicability of OBS protocols to IP over WDM. Speci c issues such as the use of ber delay-lines (FDL) for accommodating processing delay and/or resolving con icts are also discussed. In addition, the performance of JET-based OBS protocols which use an o set time along with delayed reservation to achieve e cient utilization of both bandwidth and FDLs as well as to support priority-based routing is evaluated.

IJERT-Optical Burst Switching (OBS): A New Area in Optical Networking

International Journal of Engineering Research and Technology (IJERT), 2014

https://www.ijert.org/optical-burst-switching-obs-a-new-area-in-optical-networking https://www.ijert.org/research/optical-burst-switching-obs-a-new-area-in-optical-networking-IJERTV3IS20318.pdf The Optical Burst Switching (OBS) is a growing result to the technology issue that could achieve a feasible network in future. They are featured with the ability to meet the bandwidth requirement of those applications that demand intensive bandwidth. There are more domains opening up in the OBS that clearly shows their advantages and their capability to face the future network traffic. However, the concept of OBS is still far from perfection facing issues in case of security threat. The transfer of optical switching paradigm to optical burst switching faces serious downfall in the fields of Burst aggregation, routing, authentication, dispute resolution and quality of service (QoS). Optical Internet has become the main conduit for all types of virtually sharing communications around the world as it continues its phenomenal growth of in traffic volumes and reaches using dedicated optical routers. Optical burst switching (OBS) is a predominant switching technology for Optical network to cater the huge bandwidth demand.

Switch architecture for optical burst switching networks

2003

We present a new switch architecture for optical burst switching networks that utilizes the just-in-time signaling protocol. Signaling is done out of band, with signaling messages undergoing electrooptical (EO) conversion at every hop while data, on the other hand, travels transparently through the configured path. The switch was implemented and deployed in advanced technology demonstration network (ATDNet); it is capable of processing 2.88 Gbps of signaling messages traffic on an Altera FPGA.