Challenges for GMPLS lightpath provisioning in transparent optical networks: Wavelength constraints in routing and signaling

Muoz, R.; Martínez, Ricardo; Casellas, Ramon

doi:10.1109/mcom.2009.5181889

Cited by 30 publications

(18 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The data plane of the ADRENALINE Testbed has been recently enlarged to accommodate packet-switching technology (MPLS-TP nodes) [8] besides the existing WSON switches (i.e., OXCs and ROADMs) [9] as shown in Fig. 2a.…”

Section: The Adrenaline Testbed: Evolution Towards a Unified Mln Contmentioning

confidence: 99%

Requirements and enhancements for the evolution of the GMPLS control plane of the ADRENALINE testbed to support multi-layer (MPLS-TP/WSON) capabilities

Martínez

Casellas

Muñoz

2011

2011 13th International Conference on Transparent Optical Networks

View full text Add to dashboard Cite

The demand for a higher transport capacity along with the appearance of new packet-based services (e.g., IPTV) is imposing strong requirements on current telecom networks. In the current transport network architecture, IP is the dominant convergence layer used to aggregate packet services. The growth on the bandwidth requirements leads to increase the number of IP routers and electronic interfaces which may cause scalability problems in terms of both network cost and consumed power. Thus, it becomes essential to seek for alternatives to attain a more cost-efficient, scalable, simple and flexible transport infrastructure. One of the most promising transport solutions relies on exploiting the Ethernet as the aggregation layer and the optical switching to offload the IP layer. In this context, we concentrate on such a hybrid architecture where a connection-oriented packet transport network (MPLS-TP) used to support Ethernet service delivery is integrated with a WSON infrastructure. This work identifies the ongoing steps to enhance the GMPLS control plane of the ADRENALINE testbed to effectively managing, in a unified way, such dual-layer network architecture. Particularly, these enhancements address the control of a MPLS-TP packet switching network element, the exploitation of the GMPLS concept of Forwarding Adjacency, the use of efficient multi-layer routing algorithms and the new functions among the controllers constituting the unified GMPLS control plane.

show abstract

Section: The Adrenaline Testbed: Evolution Towards a Unified Mln Contmentioning

confidence: 99%

Requirements and enhancements for the evolution of the GMPLS control plane of the ADRENALINE testbed to support multi-layer (MPLS-TP/WSON) capabilities

Martínez

Casellas

Muñoz

2011

2011 13th International Conference on Transparent Optical Networks

View full text Add to dashboard Cite

show abstract

“…In order to estimate the PLI impact, these algorithms require the definition of a QoT estimator and a pre-specified minimum signal QoT performance (QoT th ), below which the signal is considered beyond the receiver's sensitivity [13]. In the context of wavelength switched optical networks (WSONs), RRP has been the focus of intensive research over the last years (see, e.g., [12,[14][15][16][17]), and has eventually led to standardization activities within IETF [18].…”

Section: Introductionmentioning

confidence: 99%

Cost Feasibility Analysis of Translucent Optical Networks With Shared Wavelength Converters

Pedrola

Careglio

Klinkowski

et al. 2013

J. Opt. Commun. Netw.

View full text Add to dashboard Cite

Abstract-Translucent optical networks have emerged as potential yet feasible candidates to bridge the gap between the opaque and transparent network architectures. By allowing electrical 3R signal regeneration only at selected points in the network, translucent architectures represent a cost-effective, power-efficient solution. Concurrently, forecasts predicting highly dynamic traffic patterns make it crucial for next-generation transport networks to engage highly agile technologies that include sub-wavelength switching (SWS). In translucent SWS networks, contention resolution is achieved through the still technologically immature all-optical wavelength converters (WCs). Since WCs are expected to be expensive, power-consuming devices, there has been significant research effort on devising WC-sharing architectures, which aim at minimizing the number of these devices in the network. WC sharing, however, requires complex switching fabrics that involve a much higher number of optical gates and stronger degradation due to physical layer impairments (more electrical 3R regenerators). It is clear, then, that the technological interest in WC-sharing architectures mainly depends on the cost trade-offs existing between these three components. For this reason, in this work, we carry out a comprehensive cost feasibility analysis of translucent networks based on asynchronous WC-sharing packet switches. After modeling a set of translucent WC-sharing switching fabrics, we assess their performance in an isolated node scenario in terms of the number of WCs and optical gates required. Given the results obtained, we select the shared-per-node (SPN) architecture to compare its hardware requirements with those of a network based on dedicated WC nodes (i.e., one WC per wavelength and input port). To this end, an iterative simulation algorithm is used to dimension translucent SWS networks considering a broad range of continental-scale topologies. The results are first analyzed using relative cost values, and finally the viability/feasibility of WC-sharing schemes is discussed considering state-of-the-art technology. Our main conclusion is that, for SPN-based architectures to become cost effective, the cost of WCs has to be at least two orders of magnitude higher than that of the optical gate and similar to or lower than that of the electrical 3R regenerator.

show abstract

“…In WSONs, end-to-end optical connections (i.e., lightpaths) are switched entirely in the optical domain. However, transparent WSONs are affected by two major challenges: the degradation of the optical signal quality due to transmission impairments [1], and the wavelength continuity constraint [2] from the source to the destination nodes. To better cope with such issues, the concept of translucent WSONs [1] has emerged, where regenerators for re-amplifying, re-shaping and re-timing the optical signal (3R regeneration) are strategically placed.…”

Section: Introductionmentioning

confidence: 99%

Distributed Sharing of Functionalities and Resources in Survivable GMPLS-Controlled WSONs

Manolova

Cerutti

Muñoz

et al. 2012

J. Opt. Commun. Netw.

Self Cite

View full text Add to dashboard Cite

To exploit the sharing benefits, the scarce regenerators are used for both regeneration and wavelength conversion (WC) leading to a sharing of functionalities. Also, the shared path protection mechanism is exploited to ensure survivability against single-link failures and make the sharing of network resources (regenerators and wavelengths) possible. The paper presents a novel distributed scheme (DISTR) for reservation of regenerators and wavelengths in generalized multi-protocol label switching controlled WSONs, in order to ensure the required level of QoT and survivability. Novel objects and selection strategies for the resource reservation protocol with traffic engineering extensions are proposed and evaluated. The DISTR scheme effectively combines regeneration and WC points, leading to a noticeable reduction of the regeneration usage with respect to the existing schemes. Moreover, a significant reduction of the blocking probability is achieved, independently of the wavelength selection strategy used.

show abstract

Challenges for GMPLS lightpath provisioning in transparent optical networks: Wavelength constraints in routing and signaling

Cited by 30 publications

References 4 publications

Requirements and enhancements for the evolution of the GMPLS control plane of the ADRENALINE testbed to support multi-layer (MPLS-TP/WSON) capabilities

Requirements and enhancements for the evolution of the GMPLS control plane of the ADRENALINE testbed to support multi-layer (MPLS-TP/WSON) capabilities

Cost Feasibility Analysis of Translucent Optical Networks With Shared Wavelength Converters

Distributed Sharing of Functionalities and Resources in Survivable GMPLS-Controlled WSONs

Contact Info

Product

Resources

About