Multi-granular Stream Optical Burst Switching

Yu, Oliver; Liao, Ming; Cao, Yuan

doi:10.1109/broadnets.2006.4374340

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…Multi-granular stream optical burst switching (MGS-OBS) [9] extended the TDMlWDM scheme with variable-The rest of this paper is organized as follows. Section II presents the OBTS architecture.…”

Section: Introductionmentioning

confidence: 99%

Statistical Multiplexed Optical Burst-Train Switching Network

Yu¹,

Liao²

2009

Proceedings of the 6th International ICST Conference on Broadband Communications, Networks, and Systems

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The Optical Burst-Train Switching (OBTS) network efficiently transports multi-granular subwavelength constant-bit-rate (CBR) and variable-bitrate (VBR) traffic streams over an all-optical network with sparse wavelength convertibility while minimizing access blocking of traffic streams. Sub-wavelength traffic streams are shaped into periodic burst-trains at network edge with variable burst sizes. Proactive periodic reservation of burst-trains minimizes reservation signaling and scheduling overheads. OBTS combines variable-sized-slot time division multiplexing over network core and stream-based statistical multiplexing at network edge to provide guaranteed bandwidth for CBR traffic, while minimizing data loss of average-provisioned VBR traffic. Performance of OBTS is analyzed in terms of stream or burst-train blocking and data loss of average-rate provisioned VBR traffic. The tuning effects on OBTS performance are investigated with regards to wavelength convertibility factor, switching latency, periodic scheduling frame size, burst size and traffic burstiness. I.

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Section: Introductionmentioning

confidence: 99%

Statistical Multiplexed Optical Burst-Train Switching Network

Yu¹,

Liao²

2009

Proceedings of the 6th International ICST Conference on Broadband Communications, Networks, and Systems

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“…This technique is however not limited to WR-OBS and can be adapted to our proposal. SOBS solves the granularity issue by multiplexing several sub-wavelength connections in a TOM manner, but it introduces several complex synchronization issues (see, e.g., [8]- [10]). SOBS has been successfully applied in [11] where the authors restructure the network topology around a set of interconnected clusters.…”

Section: Introductionmentioning

confidence: 99%

Improving RWA-OBS Formulation and Solution

Coutelen

Jaumard

Hebuterne

2009

Proceedings of the 6th International ICST Conference on Broadband Communications, Networks, and Systems

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Loss-less transfers are commonly associated with circuit switching: Circuit switching in all-optical networks (OCS) prevent from collisions by avoiding multiplexing below the wavelength granularity. Spectral multiplexing can be combined with time multiplexing in opaque networks at the expense of additional equipment (MSPP) and complex synchronization issues. Optical Burst Switching has been proposed a decade ago as a promising alternative to OCS: Its asynchronous nature and its arbitrary granularity open the possibility of statistical multiplexing, but it is not well suited to handle loss-less requirements. Wavelength routing and TDM can still be performed at the expense of a slight modification of the control plane, but those solutions override the OBS flexibility and avoid the statistical multiplexing.The RWA-OBS problem tends to solve the drawbacks of both WR-OBS and SOBS. Based on several properties related to the in advance reservation and the data plane transparency of OBS, it integrates particular cases where two flows can be multiplexed on a given wavelength in a genuine OBS fashion without loss. We first enhance the original RWA-OBS formulation and then describe an iterative greedy heuristic and a column generation approach to improve the computing time and the scalability of the model. Experiments are conducted on two topologies to illustrate the potential of RWA-OBS that can compete with SOBS without requiring synchronization. The new proposed methods are then compared in terms of computing times and qualities. The efficiency of the column generation approach allows the integration of an additional constraint to control the compromise between the burst insertion delay and the throughput.

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