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

Block diagram of buffering and retransmission scheme.
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fig3: Block diagram of buffering and retransmission scheme.

Mentions: The server provides first hop to all the bursts. As soon as the first hop is completed the burst may go for second hop with probability β or leave the system with probability δ or join the buffer for retransmission with probability α( = 1 − β − δ). After second hop is completed the burst may leave the system with probability q or join the buffer with probability p( = 1 − q) and the server may go for maintenance activity with probability τ or remain idle with probability . The service times and maintenance activity times follow exponential distribution. The diagrammatic representation of the proposed method is given in Figure 3.


Analysis of Hybrid Buffering and Retransmission in OBS Networks.

Vanitha DV, Sabrigiriraj M - ScientificWorldJournal (2015)

Block diagram of buffering and retransmission scheme.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

fig3: Block diagram of buffering and retransmission scheme.
Mentions: The server provides first hop to all the bursts. As soon as the first hop is completed the burst may go for second hop with probability β or leave the system with probability δ or join the buffer for retransmission with probability α( = 1 − β − δ). After second hop is completed the burst may leave the system with probability q or join the buffer with probability p( = 1 − q) and the server may go for maintenance activity with probability τ or remain idle with probability . The service times and maintenance activity times follow exponential distribution. The diagrammatic representation of the proposed method is given in Figure 3.

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