VCAT-LCAS in a clamshell

Bernstein, Greg; Caviglia, Diego; Rabbat, R.; Helvoort, Huub van

doi:10.1109/mcom.2006.1637944

Cited by 23 publications

(9 citation statements)

References 2 publications

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“…AS the extension of VCAT, the LCAS specifies the hitless and dynamic adjustment processes of link capacity in the transmission networks without any break to current service [4].…”

Section: Flexible Odumentioning

confidence: 99%

A Novel Scheme for Realization of Flexible ODU Hitless Resizing

Fang

Chen

2010

2010 Symposium on Photonics and Optoelectronics

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Flexible optical channel data unit (ODUflex) is a new technique in the optical transport network (OTN) used to replace virtual concatenation (VCAT). For packet clients, it will be advantageous while ODUflex has the capability of hitless resizing like link capacity adjustment scheme (LCAS). A novel scheme is proposed in the paper for this purpose. The proposed scheme designs the new overhead (OH) and new protocol to achieve ODUflex hitless resizing. Moreover, it can be easily implemented in practical application.

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“…AS the extension of VCAT, the LCAS specifies the hitless and dynamic adjustment processes of link capacity in the transmission networks without any break to current service [4].…”

Section: Flexible Odumentioning

confidence: 99%

A Novel Scheme for Realization of Flexible ODU Hitless Resizing

Fang

Chen

2010

2010 Symposium on Photonics and Optoelectronics

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“…This algorithm uses shortest-path/k-shortest path heuristics and readily can be integrated into the constraint-based routing (CBR) engines [4] of centralized OSS or distributed GMPLS control planes. From a high-level perspective, the scheme defines a protection factor, ρ (0 ≤ ρ ≤ 1), and routes at least ρn STS-1 units of back-up capacity for a n STS-1 demand.…”

Section: Sample Performance Studymentioning

confidence: 99%

“…However, DWDM is generally not suitable for the edge owing to the prevalence of "sub-wavelength" demands, for example, Ethernet-based services, storage area network (SAN) extension, and legacy private leased line (PLL) [2]. Hence, advances in next-generation synchronous optical network/synchronous digital hierarchy (SONET/SDH NGS) time-division multiplexing (TDM) have provided much-needed multi-protocol grooming features here [1][2][3][4]. Indeed, NGS has become the premiere optoelectronic solution for fiber backbones and has redefined traditional transport hierarchies (Fig.…”

Section: Introductionmentioning

confidence: 99%

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Value-added services in next-generation SONET/SDH networks

et al. 2008

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“…To overcome the limitations of legacy infrastructure, SONET/SDH is tailored to carry data traffic more effectively [30,31,32]. One major shortcoming of the TDM architecture is the inefficiency of mapping data traffic to SONET channels.…”

Section: Next Generation Sonet/sdh (Ngs)mentioning

confidence: 99%

Dynamic Wavelength Allocation in IP/WDM Metro Access Networks

Yetginer

Karasan

2008

IEEE J. Select. Areas Commun.

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Increasing demand for bandwidth and proliferation of packet based traffic have been causing architectural changes in the communications infrastructure. In this evolution, metro networks face both the capacity and dynamic adaptability constraints. The increase in the access and backbone speeds result in high bandwidth requirements, whereas the popularity of wireless access and limited number of customers in metro area necessitates traffic adaptability. Traditional architecture which has been optimized for carrying circuit-switched connections, is far from meeting these requirements. Recently, several architectures have been proposed for future metro access networks. Nearly all of these solutions support dynamic allocation of bandwidth to follow fluctuations in the traffic demand. However, reconfiguration policies that can be used in this process have not been fully explored yet. In this thesis, dynamic wavelength allocation (DWA) policies for IP/WDM metro access networks with reconfiguration delays are considered. Reconfiguration actions incur a cost since a portion of the capacity becomes idle in the reconfiguration period due to the signalling latencies and tuning times of optical transceivers. Exact formulation of the DWA problem is developed as a Markov Decision Process (MDP) and a new cost function is proposed to attain both throughput efficiency and fairness. For larger problems, a heuristic approach based on first passage probabilities is developed. The performance of the method is evaluated under both stationary and non-stationary traffic conditions. The effects of relevant network and traffic parameters, such as delay and flow size are also discussed. Finally, performance bounds for the DWA methods are derived.

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VCAT-LCAS in a clamshell

Cited by 23 publications

References 2 publications

A Novel Scheme for Realization of Flexible ODU Hitless Resizing

A Novel Scheme for Realization of Flexible ODU Hitless Resizing

Value-added services in next-generation SONET/SDH networks

Dynamic Wavelength Allocation in IP/WDM Metro Access Networks

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