CAPEX Savings by a Scalable IP Offloading Approach

Dios, Óscar González de; Chico, Francisco; Palacios, J.P.; Guerra, S. Oliveira; Rodriguez, Mitchell A.

doi:10.1364/ofc.2011.otur5

Cited by 11 publications

(4 citation statements)

References 1 publication

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“…(4). The result in this case is the same for the MLSBR approach as for the 1 1 protection scheme because the availability of resources for both cases is the same.…”

Section: A One-region Casementioning

confidence: 71%

“…Moreover, even though Internet Protocol (IP)/MPLS and WDM/OTN still represent two significantly different domains, a critical mass of experts is working toward further integration as the next natural step in network architecture evolution [2]. Significant capital expenditure (CAPEX) savings could be obtained as demonstrated in [3][4][5] by a rational combination of optical and electronic switching for transit traffic.…”

Section: Introductionmentioning

confidence: 99%

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Minimizing Resource Protection in IP Over WDM Networks: Multi-layer Shared Backup Router [Invited]

Mayoral¹,

López

Gerstel³

et al. 2015

J. Opt. Commun. Netw.

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Optical networks and Internet Protocol/Multi-Protocol Label Switching (IP/MPLS) based networks have been traditionally designed and operated by separate departments of network operators. Likewise, both layers have always represented different business areas for system providers, which maintain different product lines for each of them. However, network operators have an IP/ MPLS over WDM architecture. The main drivers for this unique transport network are the cost savings achieved by simplifying the network infrastructure. Thanks to the advent of reconfigurable optical equipment and a multilayer control plane, 1 1 node protection at the IP layer in each location is no longer required. This work compares two resilience strategies on multi-layer network dimensioning: dual-plane protection and a multi-layer shared backup router (MLSBR). Based on the results of this paper, a MLSBR provides a significant reduction (up to 24%) on the required IP equipment in comparison with the IP protection approach.Index Terms-Multi-layer restoration; Multi-layer shared backup router (MLSBR); Protection mechanisms. A440 J. OPT. COMMUN. NETW./VOL. 7, NO. 3/MARCH 2015 Mayoral et al.

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“…(4). The result in this case is the same for the MLSBR approach as for the 1 1 protection scheme because the availability of resources for both cases is the same.…”

Section: A One-region Casementioning

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Minimizing Resource Protection in IP Over WDM Networks: Multi-layer Shared Backup Router [Invited]

Mayoral¹,

López

Gerstel³

et al. 2015

J. Opt. Commun. Netw.

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“…Optical bypass [2] [3] has been proposed as a cost-efficient solution to address overloading by using dynamic optical circuits to offload IP traffic onto optical layer. As a significant portion of today's IP traffic is directed to a small number of Internet peering, such as content service providers and data centers etc., selective identification and offloading of IP flows to the optical layers can lead to compelling cost savings [4]. In contrast to over-provisioning paradigms where excess capacity is always reserved, IP offloading with optical bypass dynamically establishes and releases optical circuits, which is also more resource efficient.…”

Section: Introductionmentioning

confidence: 99%

“…The traffic may not arrive in the destination node in order and needs to be re-sequenced, which is known as differential delay issue [5], as illustrated in Fig.2. Due to the different end-to-end delay of each wavelength, frames transmitted in order (1,2,3,4) are received out of order at the receiver R4 (1,3,2,4) which then need to be buffered and re-sequenced. Similar issue also exists in the second scenario and therefore using optical parallel transmission in IP offloading needs to consider differential delay compensation capability in the network.…”

Section: Introductionmentioning

confidence: 99%

On the effectiveness of optical parallel transmission in IP offloading

Chen

Chamania

Jukan

2012

2012 17th European Conference on Networks and Optical Communications

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The use of dynamic optical circuits for IP offloading, also referred to as optical bypass, was proposed to counter overloading in IP networks caused by sudden traffic surges. Approaches proposed to date use single path routing to setup optical bypass. However, the discrete bandwidth granularities of optical circuits may lead to the so-called bandwidth mismatch issue where the capacity of an optical circuit can either be far greater or smaller than the bandwidth required for IP offloading. This eventually increases the cost of IP offloading and leads to inefficient capacity utilization of optical bypasses. In this paper, we propose to employ optical parallel transmission to counter the bandwidth mismatch in IP offloading with consideration of differential delay caused by path diversity. We formulate the problem using Integer Linear Programming (ILP) and analyze the effectiveness of optical parallel transmission to counter bandwidth mismatch in IP offloading. We model the problem under conditions where a) the complete IP traffic matrix is known or b) only typical IP traffic measurements are available. The numerical results show that the use of optical parallel transmission in IP offloading can better match bandwidth requirements of IP offloading, thereby improving resource utilization and reducing the cost of optical bypasses comparing with single path routing.

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