Broadband Multicasting for Wavelength-Striped Optical Packets

Lai, Caroline P.; Bergman, Keren

doi:10.1109/jlt.2012.2188276

Cited by 16 publications

(11 citation statements)

References 35 publications

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“…The minimum number of address headers required for an N × N network is log 2 (N) (i.e., here, two wavelengths). We use two additional header wavelengths to enable multicasting [29], in order to address all or a subset of network ports. One additional header wavelength, the frame, indicates the presence of a message.…”

Section: Optical Network Test-bedmentioning

confidence: 99%

“…Our implementation enables a microprocessor to utilize wavelength-striped multicasting within an optical interconnection network [29] to create a more resilient memory system than is possible using today's electronically interconnected memory. The optical network also enables fault tolerance through efficient dynamic bit-steering, i.e., when the number of errors at an OCM node exceeds a specified error threshold, the memory data are dynamically redirected to another node, thus allowing hot swapping of the defective memory module.…”

Section: A Experimental Setupmentioning

confidence: 99%

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Resilient Optically Connected Memory Systems Using Dynamic Bit-Steering [Invited]

Brunina

Lai

Liu

et al. 2012

J. Opt. Commun. Netw.

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Abstract-Resilience is becoming an increasingly critical performance requirement for future large-scale computing systems. In data center and high-performance computing systems with many thousands of nodes, errors in main memory can be a significant source of failures. As a result, large-scale memory systems must employ advanced error detection and correction techniques to mitigate failures. Memory devices are primarily designed for density, optimizing memory capacity and throughput, rather than resilience. A strict focus on memory performance instead of resilience risks undermining the overall stability of next-generation computers. In this work, we leverage an optically connected memory system to optimize both memory performance and resilience. A multicast-capable optical interconnection network replaces the traditional electronic bus between a processor and its main memory, allowing for a novel error-correction technique based on dynamic bit-steering. As compared to an electronically connected approach, we demonstrate significantly higher memory bandwidths and reduced latencies, in addition to a 700× improvement in resilience.

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Section: Optical Network Test-bedmentioning

confidence: 99%

Section: A Experimental Setupmentioning

confidence: 99%

Resilient Optically Connected Memory Systems Using Dynamic Bit-Steering [Invited]

Brunina

Lai

Liu

et al. 2012

J. Opt. Commun. Netw.

Self Cite

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“…Because it can reduce repeated optical-electrical-optical conversions to the maximum extent practicable, all-optical multicasting leads to more transparent and power-efficient solutions compared to conventional IP multicasting [15][16][17]. For alloptical multicasting in wavelength-division multiplexing (WDM) networks, previous studies have investigated the routing and wavelength assignment problem in [18,19], the multicast-capable switch architectures in [17,20,21], multicast overlay network designs in [22], etc. Since the O-OFDM technology can achieve more flexible bandwidth allocation in the optical layer, we expect the EONs to provide more efficient support for all-optical multicasting scenarios, especially when traffic demands dynamically vary a lot.…”

Section: Introductionmentioning

confidence: 99%

Efficient Resource Allocation for All-Optical Multicasting Over Spectrum-Sliced Elastic Optical Networks

Gong¹,

Zhou²,

Liu³

et al. 2013

J. Opt. Commun. Netw.

298

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Recently, optical orthogonal frequencydivision multiplexing technology has attracted intensive research interest because spectrum-sliced elastic optical networks (EONs) can be constructed based on it. In this paper, we investigate how to serve multicast requests over EONs with multicast-capable routing, modulation level, and spectrum assignment (RMSA). Both EON planning with static multicast traffic and EON provisioning with dynamic traffic are studied. For static EON planning, we formulate two integer linear programming (ILP) models, i.e., the joint ILP and the separate ILP. The joint ILP optimizes all multicast requests together, while the separate ILP optimizes one request each time in a sequential way. We also propose a highly efficient heuristic that is based on an adaptive genetic algorithm (GA) with minimum solution revisits. The simulation results indicate that the ILPs and the GA provide more efficient EON planning than the existing multicast-capable RMSA algorithms that use the shortest path tree (SPT) and the minimal spanning tree (MST). The results also show that the GA obtains more efficient EON planning results than the separate ILP with much less running time, as it can optimize all multicast requests together in a highly efficient manner. For the dynamic EON provisioning, we demonstrate that the GA is also applicable, and it achieves lower request blocking probabilities than the benchmark algorithms using SPT and MST.Index Terms-Adaptive genetic algorithm; Multicast traffic; Optical orthogonal frequency-division multiplexing (O-OFDM); Routing, modulation-level, and spectrum assignment (RMSA).

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“…Many heuristics and intelligent optimization algorithms are proposed to optimize the minimal cost delay-constrained multicast tree routing [5]. It is difficult to meet the enormous multicast connection requires for a fiber link only provides a very limited wavelength channels in the WDM networks [6].…”

Section: Introductionmentioning

confidence: 99%

A Multicast Routing to Improve Multicast Capacity with Minimal Network Coding Cellsin WDM Networks

Liu

Zhou

Chen

2014

Journal of Optical Communications

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Multicast routing based on network coding can save large wavelength channels with high network coding operation costs for the all-optical WDM network. An optical multicast routing algorithm based on minimum network coding cells to reach the multicast max-flow is proposed in the paper. The algorithm selects path in the K shortest paths from source to each destination which meets the two criteria. One is to select paths making the least probability of dropping multicast max-flow. The other is to make the path lowest potential path coding cells in the K shortest paths. We investigate that the previously proposed multicast algorithms based on network coding choose the shortest paths or link-disjoint highest shared links to construct network coding sub-graph which may result in the large coding operation cost and decrease the possibility of getting the maximal multicast flow. The simulation results show that the proposed algorithm can effectively reduce the network coding cells and improve the possibility of achieving the multicast max-flow by using our designed two path selection criteria. In addition, the proposed multicast algorithm deteriorates a very limited multicast link costs which is very close to the lowest link costs. So, the proposed algorithm can get the cost-effective multicast routing for the optical networks.

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Broadband Multicasting for Wavelength-Striped Optical Packets

Cited by 16 publications

References 35 publications

Resilient Optically Connected Memory Systems Using Dynamic Bit-Steering [Invited]

Resilient Optically Connected Memory Systems Using Dynamic Bit-Steering [Invited]

Efficient Resource Allocation for All-Optical Multicasting Over Spectrum-Sliced Elastic Optical Networks

A Multicast Routing to Improve Multicast Capacity with Minimal Network Coding Cellsin WDM Networks

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