scholarly journals WDM Network and Multicasting Protocol Strategies

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Pinar Kirci ◽  
Abdul Halim Zaim
Keyword(s):  
Optical Networks ◽  
Wavelength Division Multiplexing ◽  
Multicast Routing ◽  
Wdm Networks ◽  
Just In Time ◽  
Wavelength Division ◽  
Burst Switching ◽  
Internet Users ◽  
Data Transparency ◽  
Optical Burst

Optical technology gains extensive attention and ever increasing improvement because of the huge amount of network traffic caused by the growing number of internet users and their rising demands. However, with wavelength division multiplexing (WDM), it is easier to take the advantage of optical networks and optical burst switching (OBS) and to construct WDM networks with low delay rates and better data transparency these technologies are the best choices. Furthermore, multicasting in WDM is an urgent solution for bandwidth-intensive applications. In the paper, a new multicasting protocol with OBS is proposed. The protocol depends on a leaf initiated structure. The network is composed of source, ingress switches, intermediate switches, edge switches, and client nodes. The performance of the protocol is examined with Just Enough Time (JET) and Just In Time (JIT) reservation protocols. Also, the paper involves most of the recent advances about WDM multicasting in optical networks. WDM multicasting in optical networks is given as three common subtitles: Broadcast and-select networks, wavelength-routed networks, and OBS networks. Also, in the paper, multicast routing protocols are briefly summarized and optical burst switched WDM networks are investigated with the proposed multicast schemes.

scholarly journals Best Fit Void Filling Segmentation Based Algorithm in Optical Burst Switching Networks

2016 ◽  
Vol 1 ◽  
pp. 1
Author(s):  
A. K. Rauniyar ◽  
A. S. Mandloi
Keyword(s):  
Optical Networks ◽  
Wavelength Division Multiplexing ◽  
Scheduling Algorithm ◽  
Optical Burst Switching ◽  
Wdm Optical Networks ◽  
Switched Networks ◽  
Burst Switching ◽  
College Of Engineering ◽  
Data Burst ◽  
Optical Burst

<p>Optical Burst Switching (OBS) is considered to be a promising paradigm for bearing IP traffic in Wavelength Division Multiplexing (WDM) optical networks.  Scheduling of data burst in data channels in an optimal way is one of a key problem in Optical Burst Switched networks. The main concerns in this paper is to schedule the incoming bursts in proper data channel such that more burst can be scheduled so burst loss will be less. There are different algorithms exists to schedule data burst on data channels. Non-preemptive Delay-First Minimum Overlap Channel with Void Filling (NP-DFMOC-VF) and Non-preemptive Segment-First Minimum Overlap Channel with Void Filling (NP-SFMOC-VF) are best among other existing segmentation based void filling algorithms. Though it gives less burst loss but not existing the channel utilization efficiently. In this paper we propose a new approach, which will give less burst loss and also utilize existing channels in efficient way. Also analyze the performance of this proposed scheduling algorithm and compare it with the existing void filling algorithms. It is shown that the proposed algorithm gives some better performances compared to the existing algorithms.</p><p><em>Journal of Advanced College of Engineering and Management, Vol.1, 2015,</em> pp. 1-10</p><p> </p>

A Review Burst Assembly Techniques in Optical Burst Switching (OBS)

2015 ◽  
Vol 73 (2) ◽  
Author(s):  
Abdulsalam A. Yayah ◽  
Abdul Samad Ismail ◽  
Yahaya Coulbaly
Keyword(s):  
Optical Networks ◽  
Optical Burst Switching ◽  
Continuous Growth ◽  
Burst Switching ◽  
Edge Node ◽  
Internet Users ◽  
All Optical ◽  
Burst Assembly ◽  
Switching Method ◽  
Optical Burst

Optical Burst Switching (OBS) is perceived as the most favorable switching method for the next generation all optical networks to support the growth of the number of Internet users and to satisfy bandwidth demands for greedy-bandwidth applications which are in continuous growth. OBS consists of an edge node and a core node. The edge node is responsible for burst assembly which is the first process in an OBS network. Currently, there is only one review paper for burst assembly; the paper is limited in number of techniques reviewed. In this paper, we have undertaken a comprehensive review of burst assembly techniques proposed for OBS where techniques are reviewed by category. The aim is to identify strengths and weaknesses of these techniques. The analysis of the paper will assist researchers in finding problems; thus, a significant amount of time will be saved which can be used in developing appropriate solutions for OBS networks.

scholarly journals The Gain of Performance of Optical WDM Networks

2008 ◽  
Vol 2008 ◽  
pp. 1-10
Author(s):  
Miroslav Bahleda ◽  
Karol Blunar
Keyword(s):  
Optical Networks ◽  
Wavelength Division Multiplexing ◽  
Wavelength Conversion ◽  
Blocking Probability ◽  
Probability Model ◽  
Wdm Networks ◽  
Single Fiber ◽  
Conversion Degree ◽  
Wavelength Division ◽  
Optical Wdm

We study the blocking probability and performance of single-fiber and multifiber optical networks with wavelength division multiplexing (WDM). We extend the well-known analytical blocking probability model by Barry and Humblet to the general model, which is proposed for both single-fiber and multifiber network paths with any kind of wavelength conversion (no, limited, or full wavelength conversion) and for uniform and nonuniform link loads. We investigate the effect of the link load, wavelength conversion degree, and the number of wavelengths, fibers, and hops on blocking probability. We also extend the definition of the gain of wavelength conversion by Barry and Humblet to the gain of performance, which is fully general. Thanks to this definition and implementation of our model, we compare different WDM node architectures and present interesting results.

Maximization Network Throughput Based on Improved Genetic Algorithm and Network Coding for Optical Multicast Networks

2017 ◽  
Vol 39 (1) ◽  
Author(s):  
Chengying Wei ◽  
Cuilian Xiong ◽  
Huanlin Liu
Keyword(s):  
Genetic Algorithm ◽  
Network Coding ◽  
Wavelength Division Multiplexing ◽  
Multicast Routing ◽  
Fitness Function ◽  
Wdm Networks ◽  
Network Throughput ◽  
Improved Genetic Algorithm ◽  
Wavelength Division ◽  
Optical Multicast

AbstractMaximal multicast stream algorithm based on network coding (NC) can improve the network’s throughput for wavelength-division multiplexing (WDM) networks, which however is far less than the network’s maximal throughput in terms of theory. And the existing multicast stream algorithms do not give the information distribution pattern and routing in the meantime. In the paper, an improved genetic algorithm is brought forward to maximize the optical multicast throughput by NC and to determine the multicast stream distribution by hybrid chromosomes construction for multicast with single source and multiple destinations. The proposed hybrid chromosomes are constructed by the binary chromosomes and integer chromosomes, while the binary chromosomes represent optical multicast routing and the integer chromosomes indicate the multicast stream distribution. A fitness function is designed to guarantee that each destination can receive the maximum number of decoding multicast streams. The simulation results showed that the proposed method is far superior over the typical maximal multicast stream algorithms based on NC in terms of network throughput in WDM networks.

Optical Networks Performance Optimization Based on Hybrid Configurations of Optical Fiber Amplifiers and Optical Receivers

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
I. S. Amiri ◽  
Fatma Mohammed Aref Mahmoud Houssien ◽  
Ahmed Nabih Zaki Rashed ◽  
Abd El-Naser A. Mohammed
Keyword(s):  
Optical Fiber ◽  
Optical Networks ◽  
Wavelength Division Multiplexing ◽  
Performance Optimization ◽  
Input Power ◽  
Fiber Amplifiers ◽  
Q Factor ◽  
Wavelength Division ◽  
Transmission Distance ◽  
Optical Fiber Amplifiers

AbstractThe 16-channels dense wavelength division multiplexing (DWDM) systems have been optimized by utilizing hybrid configurations of conventional optical fiber amplifiers (EDFA, RAMAN and SOA) and optical photodetectors (PIN, APD(Si) and APD(InGaAs)). The DWDM systems were implemented for 5 Gb/s channel speed using one of these configurations with 100 GHz channel spacing and 25 km amplifying section. The hybrid configurations are the combinations of (PIN + EDFA), (PIN + RAMAN), (PIN + SOA), (APD(Si) + EDFA), (APD(Si) + RAMAN), (APD(Si) + SOA), (APD(InGaAs) + EDFA), (APD(InGaAs) + RAMAN) and (APD(InGaAs) + SOA). Based on BER, Q-factor and eye diagrams, the performance was compared for these configurations under influences of various thermal noise levels of photodetectors over different fiber lengths ranging from 25 km up to 150 km. The results revealed that both APD structures give optimum performance at input power Pin = 5 dBm due to high internal avalanche gain. EDFA outperforms RAMAN and SOA amplifiers. SOA amplifier shows degraded performance because of nonlinearity effects induced. RAMAN amplifier seems to be the best alternative for long reach DWDM systems because it minimizes the effects of fiber nonlinearities. The configuration (APD(Si) + EDFA) is the most efficient and recommended to be used for transmission distance beyond 100 km due to its larger Q-factor.

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