Optical Burst Switch as a New Switching Paradigm for High-Speed Internet

Author(s):  
Joel J.P.C. Rodrigues ◽  
Mário M. Freire ◽  
Paulo P. Monteiro ◽  
Pascal Lorenz

The concept of burst switching was initially proposed in the context of voice communications by Haselton (1983) and Amstutz (1983, 1989) in the early 1980s. More recently, in the late 1990s, optical burst switching (OBS) has been proposed as a new switching paradigm for the so-called optical Internet, in order to overcome the technical limitations of optical packet switching, namely the lack of optical random access memory (optical RAM) and to the problems with synchronization (Baldine, Rouskas, Perros, & Stevenson, 2002; Chen, Qiao, & Yu, 2004; Qiao & Yoo, 1999; Turner, 1999; Yoo & Qiao, 1997; Xu, Perros, & Rouskas, 2001). OBS is a technical compromise between wavelength routing and optical packet switching, since it does not require optical buffering or packet-level processing as in optical packet switching, and it is more efficient than circuit switching if the traffic volume does not require a full wavelength channel. According to Dolzer, Gauger, Späth, and Bodamer (2001), OBS has the following characteristics: • Granularity—the transmission unit size (burst) of OBS is between the optical circuit switching and optical packet switching; • Separation between control and data—control information (header) and data are transmitted on a different wavelengths (or channels) with some time interval; • Allocation of resources—resources are allocated using mainly one-way reservation schemes. A source node does not need to wait for the acknowledge message from destination node to start transmitting the burst; • Variable burst length—the burst size is variable; • No optical buffering—burst switching does not require optical buffering at the intermediate nodes (without any delay).

Author(s):  
Joel J.P.C. Rodrigues ◽  
Paulo P. Monteiro ◽  
Pascal Lorenz

The concept of burst switching was proposed initially in the context of voice communications by Haselton (1983) and Amstutz (1983; 1989) in the early 1980s. More recently, in the late 1990s, optical burst switching (OBS) was proposed as a new switching paradigm for the so-called optical Internet in order to overcome the technical limitations of optical packet switching; namely, the lack of optical random access memory (optical RAM) and to the problems with synchronization.(Yoo & Qiao, 1997; Qiao & Yoo, 1999; Chen, Qiao & Yu, 2004; Turner, 1999; Baldine, Rouskas, Perros & Stevenson, 2002; Xu, Perros & Rouskas, 2001). OBS is a technical compromise between wavelength routing and optical packet switching, since it does not require optical buffering or packet-level processing as in optical packet switching, and it is more efficient than circuit switching if the traffic volume does not require a full wavelength channel. According to Dolzer, Gauger, Späth, and Bodamer (2001), OBS has the following characteristics: • Granularity: The transmission unit size (burst) of OBS is between the optical circuit switching and optical packet switching. • Separation Between Control and Data: Control information (header) and data are transmitted on different wavelengths (or channels) with some time interval. • Allocation of Resources: Resources are allocated using mainly one-way reservation schemes. A source node does not need to wait for the acknowledge message from destination node to start transmitting the burst. • Variable Burst Length: The burst size is variable. • No Optical Buffering: Burst switching does not require optical buffering at the intermediate nodes (without any delay).


2008 ◽  
pp. 99-118 ◽  
Author(s):  
Joel J.P.C. Rodrigues ◽  
Mário M. Freire

This chapter presents an object-oriented approach for the development of an optical burst switching (OBS) simulator, called OBSim, built in Java. Optical burst switching (OBS) has been proposed to overcome the technical limitations of optical packet switching and optical circuit switching. Due to the high costs of an OBS network infrastructure and a significant number of unanswered questions regarding OBS technology, simulators are a good choice for simulation and estimation of the performance of this kind of networks. OBSim allows the simulation and evaluation of the performance of IP over OBS mesh networks. A detailed description of the design, implementation and validation of this simulation tool is presented.


Author(s):  
Sajjad Waheed

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 data traffic Keywords: Optical Packet Switching; Optical Burst Switching; Bulk Volume; Data Traffic; Wavedivision Multiplexing DOI: http://dx.doi.org/10.3329/diujst.v6i2.9342 DIUJST 2011; 6(2): 22-32


2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Reza Poorzare ◽  
Siamak Abedidarabad

AbstractIn this tutorial, we give an introduction to optical burst switching (OBS) networks and compare different methods that have been given to improve performance of these networks. OBS is an alternative to optical circuit switching and optical packet switching by separating data from control packets and sending them in a different wavelength. OBS networks suffer from an issue based on their bufferless nature, burst contentions. In these networks, when two data bursts are competing on the same wavelength, one of them is dropped and it leads to a significant reduction on the performance of the network. A lot of researches have been done to solve this problem. Some of them are addressed in this paper.


Author(s):  
Kyriakos Vlachos

Switching in core optical networks is currently being performed using high-speed electronic or all-optical circuit switches. Switching with high-speed electronics requires optical-to-electronic (O/E) conversion of the data stream, making the switch a potential bottleneck of the network: any effort (including parallelization) for electronics to approach the optical speeds seems to be already reaching its practical limits. Furthermore, the store-and-forward approach of packet-switching does not seem suitable for all-optical implementation due to the lack of practical optical Random-Access-Memories to buffer and resolve contentions. Circuit switching on the other hand, involves a pre-transmission delay for call setup and requires the aggregation of microflows into circuits, sacrificing the granularity and the control over individual flows, and is inefficient for bursty traffic. Optical burst switching (OBS) has been proposed by Qiao, C., ?[1] to combine the advantages of both packet and circuit switching and is considered a promising technology for the next generation optical internet.


2008 ◽  
pp. 405-429
Author(s):  
Alan E. Willner ◽  
Reza Khosravani ◽  
Saurabh Kumar

2008 ◽  
Vol 6 (11) ◽  
pp. 807-811 ◽  
Author(s):  
Amit Kumar Garg Amit Kumar Garg ◽  
R S Kaler R. S. Kaler

Sign in / Sign up

Export Citation Format

Share Document