Article

Burst-cluster transmission with probabilistic pre-emption for reliable data transfer in high-performance OBS networks

Photonic Network Communication (impact factor: 0.49). 04/2012; 17(3):245-254. DOI:10.1007/s11107-008-0159-5

ABSTRACT Recently, optical switching and packet processing technologies have been developed and high-performance optical burst switching
(OBS) networks are constructed by using these technologies. In high-performance OBS networks, several types of applications
such as Grid computing and HDTV can be provided for users according to immediate reservation protocol. Because some applications
require that data is transmitted reliably over high-performance OBS networks, it is indispensable to provide reliable data
transfer service for high-priority users. Therefore, in this paper, we propose a reliable burst transmission method which
can be available for the immediate reservation protocol. In the proposed method, both burst-cluster transmission and probabilistic
pre-emption are used at edge and core nodes. By using these methods together, the reliable data transfer and the service differentiation
can be provided. We evaluate by simulation the performance of the proposed method in the 14-node NSFNET. Numerical examples
show that the proposed method can transmit higher-priority bursts more reliably than the conventional method while not increasing
the overall burst loss probability so much. In addition, we investigate effective parameter settings from some simulation
results.

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    Article: Using the Network Load for Admission Control in OBS Networks: A Multilink Approach
    I.M. Moraes, O. Duarte
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    ABSTRACT: In this article, we analyze the performance of the load-level-based admission control (LLAC) mechanism for optical burst-switched networks in a multilink scenario. The goal of our mechanism is to differentiate the blocking probability of a given service class according to the network load and a class-associated parameter, called load level. We develop a multilink analytical model based on the reduced load approximation method to analyze the proposed mechanism in more realistic scenarios. The multilink model provides an estimation error up to 13 times lower than the one provided by the single model for the analyzed configurations. Both are compared with simulation results. In addition, our results show that the load-level-based mechanism effectively differentiates the services in all analyzed configurations when compared with other similar mechanisms.
    Journal of Optical Communications and Networking 04/2010; · 1.87 Impact Factor
Data provided are for informational purposes only. Although carefully collected, accuracy cannot be guaranteed. The impact factor represents a rough estimation of the journal's impact factor and does not reflect the actual current impact factor. Publisher conditions are provided by RoMEO. Differing provisions from the publisher's actual policy or licence agreement may be applicable.

Keywords

14-node NSFNET
 
applications
 
burst loss probability
 
burst-cluster transmission
 
conventional method
 
core nodes
 
HDTV
 
high-performance OBS networks
 
high-priority users
 
immediate reservation protocol
 
optical switching
 
packet processing technologies
 
proposed method
 
reliable burst transmission method
 
reliable data transfer
 
service differentiation
 
users
 

Takuji Tachibana