On the congestion control in optical burst switching networks

Abid, A.; Abbou, F. M.; Ewe, Hong Tat

doi:10.1109/ictmicc.2007.4448649

Cited by 3 publications

(1 citation statement)

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“…More suitable approaches compared to segmentation use deflection routing and/or FDL. The use of electronic buffers in end routers or delay lines in core allows distributing bursts in some wavelengths to decrease contention [15]. However service quality in OBS is not assured because the packets can be transmitted disorderly and packet delay increases when applying these contentions solution strategies.…”

Section: Burst Contention Resolution Strategiesmentioning

confidence: 99%

The Contention Resolution in OBS Network

Jankūnienė

Tervydis

2014

ElAEE

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Burst contention occurs when attempting to transmit several optical bursts at the time into the same core router output port. This is a shortcoming of the Optical Burst Switching (OBS) networks and for this reason it has been challenging to implement the OBS mode into the transport networks so far. This problem can be solved applying various contention resolution strategies at core nodes (fiber delay lines, wavelength conversion or deflection routing). The following question arises: how does data transmission through the OBS network quality depend on using such strategy combination in the core node? For these reasons an analytical model has been created to find out what impact a joint application of various contention resolution strategies has on the data transmission quality. An algorithm has been proposed for the burst service in the OBS core router when a contention arises. The authors suggest applying burst segmentation only for the lower priority bursts, reducing the lower priority data losses in the case of mixed priority burst incoming flow. Every additional burst collision resolution strategy increases the time spent at the node however, so it is highly important to determine by means of simulations the optimal amount of resources needed at the core node.

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Section: Burst Contention Resolution Strategiesmentioning

confidence: 99%