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Many-to-Many (m2m) communication paradigm is an inevitable part of modern information exchange in telecommunication networks allowing synchronous data exchange among group of hosts. There are numerous underlying technologies and algorithms using m2m communication, in this paper we focus on dynamic provisioning of multicast-based routing for Elastic Optical Networks (EONs). We propose multilayer approach...
Network visualization in Elastic Optical Networks (EONs) utilizes the flexible spectral resources to map Virtual Networks (VN) requests onto the physical substrate network. The process of mapping the VN requests onto the physical substrate network is called Virtual Network Embedding (VNE) problem. The use of EONs in network virtualization brings in an additional requirement of satisfying the spectrum-continuity...
We study traffic grooming with shared backup path protection (SBPP) in IP over elastic optical network (EON). Efficient heuristic algorithms are developed to enable joint spare capacity sharing in both IP and optical layer. Results show that two-layer joint spare capacity sharing can significantly improve network capacity utilization and IP-layer protection is more preferable from the perspective...
We propose Optical Circuit Switching for dynamically creating reconfigurable partitions in large-scale systems with Dragonfly networks. Up to 2x execution-time improvement is demonstrated for global traffic patterns in a >13,000-node system using a production-grade network simulator.
We improve the C-RAN architecture for supporting high-speed railway communication. Results show that the improved architecture significantly reduces the bandwidth consumption brought by base station coordination and achieves higher system capacity.
We proposed a novel elastic optical network architecture employing Grouped Routing that enhances frequency utilization. With a developed network design algorithm, necessary fiber number was further reduced +20% compared with conventional elastic optical path network.
This paper proposes multi-dimensional resource mapping algorithms for inter-datacenter optical networks. Simulation results show that these proposed mapping algorithms can achieve better performance in blocking probability and revenue-to-cost ratio than the baseline algorithm.
We propose a survivable routing and resource assignment scheme with MPP and SRLG in VON to get less resources consumption and enough protection against physical failure. 29% reduction in resource consumption can be achieved.
We propose a novel regenerator site selection scheme for nonlinear impairment-aware elastic optical networks. The proposed scheme reduces bandwidth use by up to 40% in a realistic network by employing only 6 regenerator sites.
We demonstrate the use of MCF for power efficient ultra-high capacity long haul transmission. Feasibility of 105.1 Tb/s transmission over 14,350 km is shown using 12-core fiber and power equivalent of a single pump laser.
Simple and flexible RSCA methods in SDM networks are proposed. They introduce Prioritized Area concept, and two kinds of crosstalk-awareness; Strict Constraint and Best-Effort approaches, and extend/compensate their performance by MIMO based approach.
We show the first hitless 100Gbit/s real-time bandwidth-variable transmitter integrated with restful server and OTN switching matrix. Between 10.7Gbit/s and 107Gbit/s, the transmitter reconfigures in less than 450μs without packet loss and additional penalty.
We propose to realize availability-aware service provisioning in EONs with FIPP-p-cycles and bandwidth-squeezed restoration. Simulation results show that the proposed schemes are more reliable and spectrum-efficient than the existing approach.
The rise of big data and cloud computing applications is driving an explosion in the growth of data centers (DCs), and is already resulting in networking bottlenecks and performance degradation. The size and capacity of DCs are being constrained by the traditional packet-based switching architectures due to high energy consumption.
Our aim in this work is to characterize experimentally the transmission properties of a 19-core plastic optical fiber and to compare them to those obtained for several single-core POFs under the same conditions. Thus, we measured frequency response, attenuation and angular output power distribution as functions of fiber length under different configurations. Additionally, measurements of parameters...
Circuit-based optical networks have the potential to provide end-to-end dedicated channels with flexible data rates between edge node pairs. However, the data-rate granularity of spectral-slicing in the optical domain based on wavelength-selective switch (WSS) is limited by the optical filter frequency selectivity. Digital subcarrier multiplexing (DSCM) in the electrical domain is able to provide...
Dynamic allocation and release of lightpaths cause spectral fragmentation and degrade the bandwidth occupation in elastic optical networks (EON). Spectral reallocation and defragmentation strategies are key issues to minimize this problem and should be carefully chosen to simplify network management and to avoid excessive use of hardware. In this paper, we investigate the application of three different...
Optically switched networks have potential for high scalability, low power-consumption and increased bandwidth capacity and are considered a promising solution to overcome the bottlenecks in traditional Data Center Networks (DCNs) powered by electronic switches. Even though the major share of power consumption occurs in the edge tier, most of the proposals for future DCNs have concentrated on optical...
The Software Defined Network (SDN) is an established network paradigm, architecture and principles, that attracted significant research effort in recent years. An SDN-enabled infrastructure decouples network control from forwarding and enables direct programming. Recently, there is an increasing effort to introduce SDN support in the transport layers of the network operators WAN infrastructure, like...
Internet traffic volume continues to increase at a high rate every year. To handle unexpected traffic surges, link failures and growth in traffic volume, network link capacities are typically over-provisioned. To reduce the extent of over-provisioning, we proposed an application and network coordinated multi-layer architecture called ACTION. Application QoE (Quality of Experience) are translated into...
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