Showing papers in "Optical Switching and Networking in 2015"

TL;DR: This paper reviewed the recent progress carried out on a TWDM-PON system configuration, with emphasis on tunable transmitter and receiver optical network unit (ONU) in terms of the amount of tuning range reported in exploiting the wavelength plan provided with cost efficiency.

TL;DR: A dynamic bandwidth allocation (DBA) algorithm for Ethernet passive optical networks (EPONs) that exploits the sleep mode functionality, in which the optical network unit (ONU) is put into sleep according to the traffic load of the ONU.

TL;DR: A new optimization model based on Mixed Integer Linear Programming (MILP) is proposed that formalizes the problem of selecting the most cost-effective transmission technology in LR TDM/WDM PONs while also assigning the wavelength-channels line rate and the splitting ratio of the remote nodes at different levels, under bandwidth and power budget constraints.

TL;DR: A new network architecture for a PON-based open access network (OAN) where every optical network unit of the PON will be shared by all the service providers and in the central office multiple OLTs will be connected to handle the data packets of multiple service providers.

TL;DR: Considering the overall performance evaluation, it is shown that TWDM PON is the most promising option for the future broadband access, where locality-aware P2P video distribution is applied, thanks to its low energy consumption and required switching capacity of the network equipment needed to deliver this service.

TL;DR: Two Integer Linear Program (ILP) formulations that can optimally solve the Regenerator Placement Problem for practical-sized networks within a reasonable amount of time are presented.

TL;DR: Basic schemes of dynamic bandwidth allocation algorithms on EPON have been presented and a novel online-offline based method called hcDBA (Half Cycling Dynamic Bandwidth Allocation) has been introduced, which performs better than existing mechanism in terms of byte loss ratio and access delay.

TL;DR: A novel energy-efficient DBA framework to reduce energy consumption and guarantee network performance based on bandwidth requests in both downstream and upstream directions is designed and results show the effectiveness of the proposed framework and highlight the merits of the algorithms.

TL;DR: In-service integrated fault management mechanisms at the distribution drop fibers (DDFs) in EPON can automatically detect and identify any signal anomalies and DDF faults in the physical layer, thus decreasing the operating expense to be incurred in sending off technicians in the field.

TL;DR: AP-Sort DBA is an extension of the adaptive dynamic bandwidth allocation algorithm with sorting report messages (Sort-DBA) and promotes utilization by reduction of unused slot remainders (USR) and distribution of excess bandwidth.

TL;DR: Previous solutions for the next-generation PON are reviewed and some promising solutions are proposed for optimization mechanisms in this new networking paradigm, mainly including system architecture, MAC (Media Access Control) layer allocation of multi-dimensional resources, physical-layer performance improvement, and cross-layer optimization.

TL;DR: The proposed ahybrid WDM/TDM PON architecture that utilizes a combined ring-star based connectivity to provide shared protection against optical line terminal (OLT) failure provides a significant cost benefit over 1:1 protection scheme for achieving almost the same value of network availability.

TL;DR: A scalable AWG-based optical interconnection network for data centers, which is called OIT is proposed, which possesses good scalability and path diversity and benefits from the inherent parallelism and high capacity of WDM and AWG, which makes it a suitable candidate topology for data Centers in the cloud computing era.

TL;DR: This paper explores several aspects of modeling IPTV streaming, and presents a synthetic video trace generator that closely resembles the empirical IPTV traces, and confirms that its resultant data rate is representative of the IPTV video streaming.

TL;DR: The most cost-efficient protection scheme for PONs is identified and an important trade-off between Capital Expenditures and dependability-related Operational Expenditures regarding PON physical layout is presented and solved, giving guidelines for designing Pons where the total cost is reduced.

TL;DR: This paper investigates approaches for the traffic grooming problem that consider connection holding-times and bandwidth availability and proposes algorithms that significantly reduce the blocking of connection requests yet promote a fair distribution of the network resources in relation to the state-of-the-art solutions.

TL;DR: Throughput is shown to be consistently improved under the proposed CBFF policy with throughput gains of up to 15%, compared with the FF policy for the network scenarios the authors studied.

TL;DR: A new contention avoidance technique is proposed which utilizes the combination of traffic shaping at ingress switches and a time slot reservation technique using the coordination of egress switches to create a novel protocol called egress coordination OPS suitable for buffer-less slotted-OPS networks.

TL;DR: The results of this research reveal that the EPON performs better only up to a distance of 60km with the maximum of 16 users, and it has been observed that the GPON exhibits more reach extendibility than theEPON by using Erbium Doped Fiber Amplifier for the extended number of users, i.e. 32 users.

TL;DR: A new color channel allocation for visible light communication Cell ID based on IEEE 802.15.7 specification is proposed, based on feedback channel information, channel priority and cognitive technique, and the numerical results and experimental implementation show the enhancement of signal-to-noise ratio, blocking probability, and CCA time.

TL;DR: Simulation results demonstrate that, subject to the same end-to-end blocking probability constraints, the proposed LDBR can extend the applicability of DBR to higher traffic loads when there are a lot of active s-d pairs, which are expected in typical backbone networks.

TL;DR: A multi-objective evolutionary algorithm is proposed to simultaneously minimize the number of wavelength converters, as well as the expectation and unfairness of the blocking probability and an approximation to the optimal set of trade-off solutions called Pareto set are calculated.

TL;DR: A converged fibre-to-the-home (FTTH) based access network architecture featuring wireless services with co-existence of LTE, WiMax and UWB technologies and two different channel routing modules (CRMs) are introduced in order to address the cost effectiveness and energy efficiency issues of the proposed network.

TL;DR: This study intentionally inserts these service classes with high delay tolerance into a queue to save optical resources for future requests and develops a strategy rescheduling the queue after each departure event and chooses the best group of the waiting connections to provision.

TL;DR: This paper explores the combination of both south-path-delay-optimization and enhancement techniques and provides a thorough examination of network performance in physical latency and throughput and shows that such optimization brings critical improvement to latency in large scale networks.

TL;DR: It is demonstrated that OBS can be enhanced to overcome its known traffic congestion related weaknesses of low throughput, ineffective utilization and unfairness and is replaced by a fairer version of LRHF in EBSL to provide insights into fairness efficiency and tradeoffs.

TL;DR: A new hybrid scheme combining the limited retransmission and deflection namely combined probabilistic deflection and retransmissions (CPDR) is proposed to achieve loss minimization, overcoming the adverse effects of pure deflection

TL;DR: The CAROBS framework, originally proposed by Coutelen et al. (2010), is investigated, and results show very appealing properties, and in particular, a maximal wavelength efficiency higher than 70%.

TL;DR: This paper presents a decomposition approach for solving a variant of the routing and wavelength assignment (rwa) problem, in which all connection requests are covered by geodesics, i.e., shortest paths with respect to the number of hops.

TL;DR: A ring-based wavelength division multiplexing access network that can optimize the optical power received by each node by introducing a novel alternate transmission mode and making the number of affected RNs more predictable is presented.