DocumentCode :
3018103
Title :
Techniques for improved scheduling in optical burst switched networks
Author :
Papazoglou, C. ; Sarigiannidis, P.G. ; Papadimitriou, G.I. ; Pomportsis, A.S.
Author_Institution :
Dept. of Inf., Aristotle Univ., Thessaloniki, Greece
fYear :
2009
fDate :
23-25 March 2009
Firstpage :
1
Lastpage :
4
Abstract :
Optical burst switching (OBS) has emerged as a viable switching alternative in backbone optical networks since it can support high data rates with an intermediate granularity compared to wavelength routing and optical packet switching. At the edges of an OBS cloud, packets are assembled to form bursts which enter the network core and are switched on the fly using bandwidth previously reserved by their control packets at each node. A key problem in OBS networks is the assignment of wavelengths to incoming bursts, i.e. the scheduling of bursts. This paper proposes two new techniques which are shown to improve burst scheduling algorithms by lowering their complexity. The first proposed technique is based on a triangular estimator that defines a ldquodrop zonerdquo; bursts that fall into this area are considered to have a very low probability of finding a suitable wavelength and as such, no effort is made to schedule them. According to the second approach, the drop zone is defined dynamically based on the burst drop history. Simulation results show that both approaches yield burst drop rates marginally higher or identical to the LAUC-VF scheduling algorithm while reducing the number of channel or void checks and thus the algorithm complexity and execution time.
Keywords :
optical burst switching; optical fibre networks; packet switching; telecommunication network routing; wavelength division multiplexing; burst drop history; burst scheduling; latest available unused channel; optical burst switching; optical networks; optical packet switching; void filling; wavelength routing; Assembly; Bandwidth; Clouds; History; Optical burst switching; Optical fiber networks; Optical packet switching; Scheduling algorithm; Spine; Wavelength routing; Horizon; Latest Available Unused Channel with Void Filling; burst scheduling; bursty traffic; drop history; optical burst switching; triangular estimator;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Autonomous Decentralized Systems, 2009. ISADS '09. International Symposium on
Conference_Location :
Athens
Print_ISBN :
978-1-4244-4327-7
Type :
conf
DOI :
10.1109/ISADS.2009.5207359
Filename :
5207359
Link To Document :
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