Effects of Outdated Control Information in Control-Plane-Enabled Optical Networks With Path Protection

Tornatore, Massimo; Grandi, F. De; Muoz, R.; Martínez, Ricardo; Casellas, Ramon; Pattavina, Achille

doi:10.1364/jocn.1.00a194

Cited by 12 publications

(8 citation statements)

References 4 publications

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“…In such networks the routing protocol (e.g., OSPF-TE) advertises connectivity and resource availability information [5], [6]. Therefore effective path computation can be performed either locally by the source node or by a dedicated PCE.…”

Section: Related Workmentioning

confidence: 99%

Connectivity orchestration in multi-provider elastic optical networks (Invited paper)

Giorgetti

Paolucci

Castoldi

2017

2017 9th International Workshop on Resilient Networks Design and Modeling (RNDM)

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Abstract-Next-generation 5G concepts are driving infrastructure providers to enable novel services for network operators, such as Virtual Network Function (VNF) and Network Function Virtualization (NFV). Inside a single infrastructure provider, several solutions are available to satisfy the 5G requirements using Software Defined Networking (SDN).However, emerging industry verticals require geographicallydistributed services spanning multiple infrastructure providers. In this multi-provider context, additional complexity emerges to guarantee inter-operability. The orchestrator of each multidomain infrastructure (i.e., MDO), is emerging as the key element to offer services to a federation of infrastructure providers. In this scenario, the procedures for establishing inter-provider services are still an open research topic.This work proposes and evaluates two different procedures to enable multi-provider connectivity service exploiting distributed communication among MDOs. The two procedures are evaluated by means of simulations in a federated multi-provider network based on the Elastic Optical Network technology.

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Section: Related Workmentioning

confidence: 99%

Connectivity orchestration in multi-provider elastic optical networks (Invited paper)

Giorgetti

Paolucci

Castoldi

2017

2017 9th International Workshop on Resilient Networks Design and Modeling (RNDM)

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“…In particular shared path protection, introducing backup bandwidth sharing among lightpaths that cannot be disrupted by the same failure, emerged as the most promising protection mechanism. Several distributed implementations of shared path protection have been proposed [70]- [72]. However, a centralized PCE storing the working and backup path of all established lightpaths, can help in achieving higher sharing ratio and improve resource utilization.…”

Section: G Pce-based Protection and Restorationmentioning

confidence: 99%

A Survey on the Path Computation Element (PCE) Architecture

Paolucci

Cugini

Giorgetti

et al. 2013

IEEE Commun. Surv. Tutorials

113

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Quality of Service-enabled applications and services rely on Traffic Engineering-based (TE) Label Switched Paths (LSP) established in core networks and controlled by the GMPLS control plane. Path computation process is crucial to achieve the desired TE objective. Its actual effectiveness depends on a number of factors. Mechanisms utilized to update topology and TE information, as well as the latency between path computation and resource reservation, which is typically distributed, may affect path computation efficiency. Moreover, TE visibility is limited in many network scenarios, such as multi-layer, multidomain and multi-carrier networks, and it may negatively impact resource utilization. The Internet Engineering Task Force (IETF) has promoted the Path Computation Element (PCE) architecture, proposing a dedicated network entity devoted to path computation process. The PCE represents a flexible instrument to overcome visibility and distributed provisioning inefficiencies. Communications between path computation clients (PCC) and PCEs, realized through the PCE Protocol (PCEP), also enable inter-PCE communications offering an attractive way to perform TE-based path computation among cooperating PCEs in multi-layer/domain scenarios, while preserving scalability and confidentiality. This survey presents the state-of-the-art on the PCE architecture for GMPLS-controlled networks carried out by research and standardization community. In this work, packet (i.e., MPLS-TE and MPLS-TP) and wavelength/spectrum (i.e., WSON and SSON) switching capabilities are the considered technological platforms, in which the PCE is shown to achieve a number of evident benefits.

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“…In this case, the simulations are conducted on a dynamic network environment where the provisioning phase is carried out following two different approaches: 1) in the all-opaque networks, the connections are provisioned by CAFES algorithm [23]; 2) in the alloptical networks, the provisioning phase relies on a link vector mechanism similar to that presented in [23] for the all-opaque network, but replicated over all wavelengths [29].…”

Section: Backup Reprovisioning In Transparent Optical Networkmentioning

confidence: 99%

Algorithms and Models for Backup Reprovisioning in WDM Networks

Lucerna

Tornatore

Pattavina

2010

IEEE/ACM Trans. Networking

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Protection techniques for optical networks mainly rely on preallocated backup bandwidth, which may not be able to provide full protection guarantee when multiple failures occur in a network. To protect against multiple concurrent potential failures and to utilize the available resources more efficiently, strategies such as backup reprovisioning (BR) rearrange backups of protected connections after one failure occurs or, more generally, whenever the network state changes, e.g., when a new request arrives or terminates. Recently, new solutions for automatized management in optical networks promise to allow customers to specify on-demand the terms of the service level agreement (SLA) to be guaranteed by the service provider. In this paper, we study different backup reprovisioning techniques able to further reduce the capacity requirements exploiting the knowledge, among the other service level specifications (SLSs), of the connection holding time.

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Effects of Outdated Control Information in Control-Plane-Enabled Optical Networks With Path Protection

Cited by 12 publications

References 4 publications

Connectivity orchestration in multi-provider elastic optical networks (Invited paper)

Connectivity orchestration in multi-provider elastic optical networks (Invited paper)

A Survey on the Path Computation Element (PCE) Architecture

Algorithms and Models for Backup Reprovisioning in WDM Networks

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