A Hybrid Control Architecture for Connection Management in Translucent WDM Networks

Wang, Lei; Zhang, Jie; Gao, Guanjun; Liu, Yongjun; Chen, Xiuzhong; Gu, Wanyi

doi:10.1109/glocom.2008.ecp.495

Cited by 4 publications

(2 citation statements)

References 16 publications

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“…Combining the best features of routing-based OCP and signaling-based OCP, we propose hybrid OCP [9]. In this approach, the data needed by the RWA process is divided into three classes: dynamic data, semi-dynamic data and static data.…”

Section: Introductionmentioning

confidence: 99%

Study of optical control plane for translucent WDM networks

et al. 2010

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In this article, we concentrate on the study of control plane and management approaches for translucent WDM networks. A hybrid optical control plane (OCP) is proposed, which needs the extensions of both routing and signaling protocol, to combine the best features of routingbased information updating and signaling-based data collection and path evaluation. Simulations are conducted to compare hybrid OCP with two existing control architectures: signaling-based OCP and routing-based OCP. Numerical results show that hybrid OCP exhibits a lower blocking probability than the other approaches, and also minimizes the stability and scalability problems under various traffic conditions.

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Section: Introductionmentioning

confidence: 99%

Study of optical control plane for translucent WDM networks

et al. 2010

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“…Second, given a set of regeneration sites and regenerators, a range of lightpath routing and wavelength assignment algorithms were developed to efficiently utilize the regeneration capability, such that lightpath demands are maximally satisfied and a minimum lightpath blocking probability is achieved [12], [7], [16]- [19]. Third, in the perspective of control plane, GMPLS-based techniques were extended to support regenerator information distribution [20], [21]. These include flooding Link State Advertisement (LSA) messages that contain regenerator information via the OSPF-TE routing protocol, and exchanging signaling messages that contain regenerator information via the RSVP-TE signaling protocol.…”

Section: Introductionmentioning

confidence: 99%

Impairment-Aware Lightpath Routing and Regenerator Placement in Optical Transport Networks With Physical-Layer Heterogeneity

Shen

Sardesai

2011

J. Lightwave Technol.

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Abstract-We develop a framework that supports impairment-aware lightpath routing and wavelength assignments in optical transport networks. Different from most existing studies, we consider a more generic optical transport network with physical-layer heterogeneity, including different fiber types, variable amplification span distances and attenuation coefficients. In addition, rather than a single amplifier type as in most of the existing studies, we consider multiple amplifier types for different amplification situations. Owing to the high cost of OEO regeneration, the total number of required regenerators is considered as the major objective for optimization. A signal-quality-aware routing algorithm is developed to find routes that are expected to require the fewest regenerators. The first-fit wavelength assignment algorithm is extended to assign wavelength(s) for lightpaths after placement of some regenerators which can freely function as wavelength converters. Simulation studies indicate that the proposed algorithm can significantly reduce the required number of regenerators compared to the simple shortest-path routing algorithm. Moreover, it is found that the signal-quality-aware algorithm shows stronger benefits when a network demonstrates higher physical-layer heterogeneity such as different fiber types and non-uniform span losses. The signal-quality-aware algorithm also demonstrates better performance when a network has a higher average nodal degree. Finally, the results indicate that multiple amplifier options are important for cost-effective optical transport network design. For a network with high physical-layer heterogeneity, multiple amplifier options can significantly reduce the required number of regenerators (up to 50%) over a single amplifier option.

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Impairment-aware backward recursive PCE-based computation algorithm for wavelength switched optical networks

Zhang

Zhao

et al. 2010

2010 IEEE 12th International Conference on Communication Technology

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A Hybrid Control Architecture for Connection Management in Translucent WDM Networks

Cited by 4 publications

References 16 publications

Study of optical control plane for translucent WDM networks

Study of optical control plane for translucent WDM networks

Impairment-Aware Lightpath Routing and Regenerator Placement in Optical Transport Networks With Physical-Layer Heterogeneity

Impairment-aware backward recursive PCE-based computation algorithm for wavelength switched optical networks

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