Field trial of a 15 Tb/s adaptive and gridless OXC supporting elastic 1000-fold all-optical bandwidth granularity

An adaptive gridless OXC is implemented using a 3D-MEMS optical backplane plus optical modules (sub-systems) that provide elastic spectrum and time switching functionality. The OXC adapts its architecture on demand to fulfill the switching requirements of incoming traffic. The system is implemented in a seven-node network linked by installed fiber and is shown to provide suitable architectures on demand for three scenarios with increasing traffic and switching complexity. In the most complex scenario, signals of mixed bit-rates and modulation formats are successfully switched with flexible per-channel allocation of spectrum, time and space, achieving over 1000-fold bandwidth granularity and 1.5 Tb/s throughput with good end-to-end performance

Multiple Heterogeneous Ant Colonies with Information Exchange

The method of multiple heterogeneous ant colonies with information exchange (MHACIE) is presented in this paper with emphasis on the speed of finding the optimal solution and the corresponding computational complexity. The proposed method which is inspired by biology and psychology has a structure composed of several ant colonies. These colonies participate in solving problems in a concurrently manner and also exchange information with each other in communicational steps. Each ant colony is considered as an intelligent agent with behavioral traits. These behavioral traits play a key role in the solving procedure, in interrelation circumstances and in installation of relations. Faster solutions have been achieved using different employments of agents in the algorithm structure. Experimental results show the superiority of Multiple heterogeneous ant colonies algorithm in comparison to the standard ant colony system (ACS) and particle swarm optimization (PSO) algorithms on different benchmarks. A dynamic, control engineering benchmark is also provided in order to gain a more complete evaluation of the proposed algorithm

Online Repurposing and Dimensioning of a Programmable Fixed-Grid and Flex-Grid Optical Network

This paper reports on architectural and performance analysis of online re-purposed networks built with programmable data and control plane for Fixed and Flex-Grid communication. The studies demonstrate the effect of node placement strategies on performance, the impact of routing and resource allocation mechanisms, and the corresponding trade offs

High performance and flexible FPGA-based time shared optical network (TSON) metro node

The paper presents the architecture, implementation and evaluation of the flexible and finely granular Time Shared Optical Network (TSON) metro node. It focuses on the FPGA-based Layer 2 TSON metro node system. The experimentally measured results show exceptional performance of up to 8.68 Gbps throughput per 10 Gbps port, 95.38% of theoretical maximum throughput, latency of less than 160 μsec and jitter of less than 25 μsec. The TSON topology agnostic node/network also delivers differentiated QoS latency levels yet always guaranteed (contention-free) by deploying diverse time-slice allocation schemes

All Programmable and Synthetic Optical Network: Architecture and Implementation

This paper reports on the design, implementation, and evaluation of a multitechnology, multirate, and adaptable network architecture for metropolitan/edge areas. It is empowered by programmability in control and data planes, providing users with an open network platform to redefine and optimize its behavior and performance. It uses a hybrid data plane of fixed-grid [(sub)wave-length] and flex-grid systems to support a broad range of data rates (1 to 555 Gb/s). The programmability in the data plane is achieved by building the nodes with a modular and flexible architecture (architecture on demand nodes) to achieve different functionalities (fixed-/flex-grid switching with or without time multiplexing) on demand. A centralized, modular, and scalable control framework has been constructed for this network. It uses a set of software plug-ins designed for architecture synthesis and adaptation for policing network resources access and as algorithms of routing and resource allocation for network operation. The proposed hybrid network architecture, along with allocation policies and resource allocation algorithms, is evaluated through simulations across a broad range of traffic profiles with bandwidth requests stretching from 1 to 400 Gb/s. Finally, the programmable data-plane/control-plane architecture has been implemented in an experimental testbed and the functionality of the node and network elements individually and together have been tested, demonstrating the feasibility of the system. © 2013 Optical Society of America

Programmable on-chip and off-chip network architecture on demand for flexible optical intra-Datacenters

The paper presents a novel network architecture on demand approach using on-chip and-off chip implementations, enabling programmable, highly efficient and transparent networking, well suited for intra-datacenter communications. The implemented FPGA-based adaptable line-card with on-chip design along with an architecture on demand (AoD) based off-chip flexible switching node, deliver single chip dual L2-Packet/L1-time shared optical network (TSON) server Network Interface Cards (NIC) interconnected through transparent AoD based switch. It enables hitless adaptation between Ethernet over wavelength switched network (EoWSON), and TSON based sub-wavelength switching, providing flexible bitrates, while meeting strict bandwidth, QoS requirements. The on and off-chip performance results show high throughput (9.86Ethernet, 8.68Gbps TSON), high QoS, as well as hitless switch-over

Software/Hardware defIned NEtwork (SHINE): A Novel Adaptive Optical Network Framework for Future Internet

A novel Software/Hardware defIned NEtwork (SHINE) framework for future optical network is proposed in this paper. An FPGA based SHINE adaptive network element (SANE) carrying time shared optical network (TSON) service and 10G Ethernet service is implemented. A cross-platform C++/Qt based SHINE IDE incorporating fine/coarse granular instruction set is developed to simply compose node/network manually or automatically. Five types of SHINE working flows, i.e. node on demand, network on demand, node self-adaptation, node generation, and network generation, are depicted, then demonstrated and selectively evaluated. Particularly, a hitless switch-over between sub-wavelength service (TSON) and low latency fat pipe service (10G Ethernet) (network on demand), and a receiver automatically detects transmitter's change (i.e. switch-over from TSON to Ethernet), then adjusts itself (node self-adaption), are highlighted. © 2012 IEEE

Virtualization of heterogeneous wireless-optical network and IT infrastructures in support of cloud and mobile cloud services

This article proposes a next generation ubiquitous converged infrastructure to support cloud and mobile cloud computing services. The proposed infrastructure facilitates interconnection of fixed and mobile end users with data centers through a heterogeneous network integrating optical metro networks, based on time shared optical network technology, and wireless access networks, based on Long Term Evolution access technology. To support the infrastructure as a service paradigm, the proposed architecture adopts the concept of virtualization across the technology domains involved. Planning of virtual infrastructures considering jointly the presence of all network technology domains and IT resources is proposed, with the aim to offer globally optimized virtual infrastructures (VIs) in terms of energy consumption and resource requirements. The holistic VI planning approach proposed ensures allocation of the required resources across all technology domains to support not only the volume of service requests, but also their specific characteristics such as end users¿ mobility. Our modeling results clearly show that both the volume and characteristics of services have a direct impact on the energy consumption and resource requirements of all the technology domains of the planned VIs. © 1979-2012 IEEE