Limits...
Analysis of Hybrid Buffering and Retransmission in OBS Networks.

Vanitha DV, Sabrigiriraj M - ScientificWorldJournal (2015)

Bottom Line: Each one has its own limitations.Normally all the bursts reach the first hop and few of them go for second hop to reach destination.After all the bursts reach the destination the server may go for maintenance activity or wait for the arrival of next burst.

View Article: PubMed Central - PubMed

Affiliation: ECE Department, Faculty of Engineering, Avinashilingam Institute for Home Science and Higher Education for Women, Coimbatore 641108, India.

ABSTRACT
Burst contention is a major problem in the Optical Burst Switching (OBS) networks. Due to inadequate contention resolution techniques, the burst loss is prominent in OBS. In order to resolve contention fiber delay lines, wavelength converters, deflection routing, burst segmentation, and retransmission are used. Each one has its own limitations. In this paper, a new hybrid scheme is proposed which combines buffering and retransmission, which increases the mean number of bursts processed in the system. In this hybrid method, retransmission with controllable arrival and uncontrollable arrival is analyzed. Normally all the bursts reach the first hop and few of them go for second hop to reach destination. After all the bursts reach the destination the server may go for maintenance activity or wait for the arrival of next burst. We model it as a batch arrival single server retrial queue with buffer. Numerical results are analyzed to show the mean number of bursts processed in the system with uncontrollable arrival and controllable arrivals.

No MeSH data available.


Related in: MedlinePlus

NSFnet topology.
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fig1: NSFnet topology.

Mentions: In Figure 1, assume the source destination pairs for the bursts are (1, 3) and (1, 6). Few bursts have source destination pair as (1, 3) and the path is 1-3 (number of hops is 1). For another few bursts source destination pair is (1, 6) and the selected path is 1-3-6 (number of hops are 2). In this case the link 1-3 is called first hop (FH) for all the bursts and for remaining few bursts 3-6 is called second hop (SH). When contention occurs either in source itself or in FH the bursts are stored in buffer and retransmission from the buffer takes place. Otherwise the normal transmission process continues. After the burst reaches the destination, the server which is the data channel may go for maintenance activity or wait for the next arriving burst in the system.


Analysis of Hybrid Buffering and Retransmission in OBS Networks.

Vanitha DV, Sabrigiriraj M - ScientificWorldJournal (2015)

NSFnet topology.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4556332&req=5

fig1: NSFnet topology.
Mentions: In Figure 1, assume the source destination pairs for the bursts are (1, 3) and (1, 6). Few bursts have source destination pair as (1, 3) and the path is 1-3 (number of hops is 1). For another few bursts source destination pair is (1, 6) and the selected path is 1-3-6 (number of hops are 2). In this case the link 1-3 is called first hop (FH) for all the bursts and for remaining few bursts 3-6 is called second hop (SH). When contention occurs either in source itself or in FH the bursts are stored in buffer and retransmission from the buffer takes place. Otherwise the normal transmission process continues. After the burst reaches the destination, the server which is the data channel may go for maintenance activity or wait for the next arriving burst in the system.

Bottom Line: Each one has its own limitations.Normally all the bursts reach the first hop and few of them go for second hop to reach destination.After all the bursts reach the destination the server may go for maintenance activity or wait for the arrival of next burst.

View Article: PubMed Central - PubMed

Affiliation: ECE Department, Faculty of Engineering, Avinashilingam Institute for Home Science and Higher Education for Women, Coimbatore 641108, India.

ABSTRACT
Burst contention is a major problem in the Optical Burst Switching (OBS) networks. Due to inadequate contention resolution techniques, the burst loss is prominent in OBS. In order to resolve contention fiber delay lines, wavelength converters, deflection routing, burst segmentation, and retransmission are used. Each one has its own limitations. In this paper, a new hybrid scheme is proposed which combines buffering and retransmission, which increases the mean number of bursts processed in the system. In this hybrid method, retransmission with controllable arrival and uncontrollable arrival is analyzed. Normally all the bursts reach the first hop and few of them go for second hop to reach destination. After all the bursts reach the destination the server may go for maintenance activity or wait for the arrival of next burst. We model it as a batch arrival single server retrial queue with buffer. Numerical results are analyzed to show the mean number of bursts processed in the system with uncontrollable arrival and controllable arrivals.

No MeSH data available.


Related in: MedlinePlus