A parallel cross-connection recovery scheme for dual link failure in elastic optical networks

Abstract In this paper, we proposed a fast recovery strategy for a dual link failure (DLF) in elastic optical network (EON). The EON is a promising solution to meet the next generation higher bandwidth demand. The survivability of high speed network is very crucial. As the network size increases the probability of the DLF and node failure also increases. Here, we proposed a parallel cross connection backup recovery strategy for DLF in the network. The average bandwidth blocking probability (BBP), bandwidth provisioning ratio (BPR), and recovery time (RT) for our proposed Intermediate node cross-connect backup for shared path protection (INCB-SPP) for ARPANET are 0.38, 2.71, 4.68 ms, and for DPP 0.70, 6.02, 8.71 ms and for SPP 0.40, 2.87, and 16.33 ms respectively. The average BBP, BPR, and RT of INCB-SPP for COST239 are 0.01, 1.71, 3.79 ms and for DPP are 0.39, 3.50, 8.20 ms and SPP are 0.04, 1.75, and 12.47 ms respectively. Hence, the proposed strategy shows lower BBP, fast connection recovery, and BPR when compared with the existing shared path protection (SPP) and dedicated path protection (DPP) approaches. Simulation is performed on ARPANET and COST239 topology networks.

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A Resource Efficient Recovery Strategy for a Failure in Elastic Optical Networks

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.e6792.018520 ◽

2020 ◽

Vol 8 (5) ◽

pp. 4245-4249

Keyword(s):

Optical Networks ◽

Recovery Time ◽

Blocking Probability ◽

Optical Network ◽

Capacity Utilization ◽

Network Capacity ◽

Live Streaming ◽

Recovery Strategy ◽

Traffic Demand ◽

Path Protection

In the last few years, internet traffic increases continuously due to the more use of live streaming and social sites. To accommodate such high traffic demand the more bandwidth is required. The elastic optical network (EON) is a promising solution for the capacity expansion that can meet the future bandwidth requirement. The EON can provide a higher bit rate. In this paper we purposed a recovery strategy for failure in EON. Our purposed strategy shows the more acceptance rate for randomly generated source (s)-destination (d) requests. Here we considered two topologies viz. COST239 and NSFNET. Then evaluate their performance for Recovery Time, bandwidth blocking probability (BBP) and network capacity utilization (NCU), in which our purposed scheme provides lesser BBP and lower NCU for both topologies and low recovery time than shared path protection (SPP and dedicated path protection (DPP).

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New Dimensions for Survivable Service Provisioning in Optical Backbone and Access Networks

Resilient Optical Network Design ◽

10.4018/978-1-61350-426-0.ch010 ◽

2011 ◽

pp. 227-252

Author(s):

Paolo Monti ◽

Lena Wosinska ◽

Cicek Cavdar ◽

Andrea Fumagalli ◽

Jiajia Chen

Keyword(s):

Optical Networks ◽

Service Providers ◽

Blocking Probability ◽

Access Networks ◽

Service Provisioning ◽

Protection Scheme ◽

Path Protection ◽

Trade Offs ◽

Set Up ◽

Shared Path Protection

<div>Originally, networks were engineered to provide only one type of service, i.e. either voice or data, so only one level of resiliency was requested. This trend has changed, and today’s approach in service provisioning is quite different. A Service Level Agreement (SLA) stipulated between users and service providers (or network operators) regulates a series of specific requirements, e.g., connection set-up times and connection availability that has to be met in order to avoid monetary fines. In recent years this has caused a paradigm shift on how to provision these services. From a “one-solution-fits-all” scenario, we witness now a more diversified set of approaches where trade-offs among different network parameters (e.g., level of protection vs. cost and/or level of protection vs. blocking probability) play an important role.</div><div>This chapter aims at presenting a series of network resilient methods that are specifically tailored for a dynamic provisioning with such differentiated requirements. Both optical backbone and access networks are considered. In the chapter a number of provisioning scenarios - each one focusing on a specific Quality of Service (QoS) parameter - are considered. First the effect of delay tolerance, defined as the amount of time a connection request can wait before being set up, on blocking probability is investigated when Shared Path Protection is required. Then the problem of how to assign “just-enough” resources to meet each connection availability requirement is described, and a possible solution via a Shared Path Protection Scheme with Differentiated Reliability is presented. Finally a possible trade off between deployment cost and level of reliability performance in Passive Optical Networks (PONs) is investigated. The presented results highlight the importance of carefully considering each connection’s QoS parameters while devising a resilient provisioning strategy. By doing so the benefits in terms of cost saving and blocking probability improvement becomes relevant, allowing network operators and service providers to maintain satisfied customers at reasonable capital and operational expenditure levels</div>

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A Proactive Link Based Fast Recovery Strategy for Survival Elastic Optical Networks

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.c6459.029320 ◽

2020 ◽

Vol 9 (3) ◽

pp. 4018-4022

Keyword(s):

Optical Networks ◽

Blocking Probability ◽

Capacity Utilization ◽

Network Capacity ◽

Recovery Strategy ◽

Fast Recovery ◽

Backup Path ◽

Utilization Ratio ◽

Connection Recovery ◽

Link Protection

In this paper, we proposed a link based fast connection recovery strategy. A backup path either reserved in advance or searched dynamically after the failure occurred in the network. Both these recovery strategy required large backup capacity. We analyse three network parameters such as recovery time (RT), bandwidth blocking probability (BBP), and network capacity utilization ratio (NCU) for randomly generated source to destination request for three topologies that is COST239, ARPANET and NSFNET and compare the results for shared link protection (SLP), dedicated link protection (DLP), and our proposed link protection (PLP) scheme. Our proposed scheme shows the minimum RT compared to other two strategies.

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