Deploying SDN architecture in Open Optical Transport Networks

Pro udrženı́ tempa s rostoucı́mi požadavky na přenosovou rychlost, latenci a bezpečnost je nutné zvážit současnou koncepci řı́zenı́ sı́tı́. Software-Defined Networking (SDN) je jedno z možných řešenı́, ke kterému telekomunikačnı́ průmysl směruje. Tato práce představuje současný stav Software-Defined Networking a zaměřuje se na vybraná open-source řešenı́ v oblasti SDN kontrolerů, jako je ONOS či OpenDaylight. Hlavnı́m cı́lem této části práce je vysvětlit, jak může SDN pomoci vyřešit rostoucı́ požadavky na rozšı́řenı́ automatizace v otevřených optických sı́tı́ch. Praktická část této práce je rozdělená do dvou oblastı́. V rámci prvnı́ oblasti jsem se zabýval rozšı́řenı́m funkčnosti SDN kontroleru pro umožněnı́ konfigurace a řı́zenı́ optických komunikačnı́ch zařı́zenı́. Hlavnı́m přı́nosem je implementace nových funkcionalit SDN driveru pro Nokia 1830 PSS (ROADM) a rozšı́řenı́ funkcionality driveru pro Nokia 1830 PSI-2T (optický transpondér). Ve druhé části práce jsem se zabýval problematikou korelace alarmů v otevřených optických sı́tı́ch. Výsledkem je funkce pro korelaci alarmů ve formě SDN aplikace, kterou jsem dále otestoval na emulovaných optických zařı́zenı́ch pro prokázánı́ funkčnosti celého konceptu.With the rising demands on the network throughput, latency and security, legacy control networking concepts should be reconsidered. Software-Defined Networking (SDN) is one of the possible solutions, to which telecommunication industry is moving. This work presents current state-of-the-art in Software-Defined Networking and focuses on some open-source solutions of SDN controllers, like ONOS and OpenDaylight. Main focus is to understand how SDN can help to solve increasing demand for broader automation in Optical Transport Networks. The practical section is divided in two parts. Within the first part I focused on extending functionality of SDN controller to facilitate more efficient configuration and control of optical network devices. Main contribution was to implement additional features to SDN drivers for Nokia 1830 PSS (ROADM) and extend functionality of Nokia 1830 PSI-2T (Optical Transponder) driver. Second part is dedicated to the Alarm Correlation problematic in open optical networks. We designed, developed an Alarm Correlation function as a SDN application then we tested it on emulated optical devices to prove the concept

Control Plane in Software Defined Networks and Stateful Data Planes

L'abstract è presente nell'allegato / the abstract is in the attachmen

Software Defined Applications in Cellular and Optical Networks

abstract: Small wireless cells have the potential to overcome bottlenecks in wireless access through the sharing of spectrum resources. A novel access backhaul network architecture based on a Smart Gateway (Sm-GW) between the small cell base stations, e.g., LTE eNBs, and the conventional backhaul gateways, e.g., LTE Servicing/Packet Gateways (S/P-GWs) has been introduced to address the bottleneck. The Sm-GW flexibly schedules uplink transmissions for the eNBs. Based on software defined networking (SDN) a management mechanism that allows multiple operator to flexibly inter-operate via multiple Sm-GWs with a multitude of small cells has been proposed. This dissertation also comprehensively survey the studies that examine the SDN paradigm in optical networks. Along with the PHY functional split improvements, the performance of Distributed Converged Cable Access Platform (DCCAP) in the cable architectures especially for the Remote-PHY and Remote-MACPHY nodes has been evaluated. In the PHY functional split, in addition to the re-use of infrastructure with a common FFT module for multiple technologies, a novel cross functional split interaction to cache the repetitive QAM symbols across time at the remote node to reduce the transmission rate requirement of the fronthaul link has been proposed.Dissertation/ThesisDoctoral Dissertation Electrical Engineering 201

New paradigms of legacy network features over SDN Architecture

The Software Define Networking (SDN) paradigm proposes faster implementations, flexibility, and a simplified network management, resulting very attractive to new carrier deployments. Nevertheless, migrating legacy networks to SDN scenarios has been slowed down. Traditional network features, such as high availability, load balancing, and scalability are constrained by the centralized nature of SDN architecture. This study evaluates legacy network features, applied to an SDN network, analyzing the impact of this evolution on the network performance. For the evaluation, a set of virtual scenarios has been implemented, assessing different network parameters, in order to measure the impact on the network performance

Plan de contrôle SDN décentralisé pour une intrastructure Cloud-Edge: une étude survey

Today’s emerging needs (Internet of Things applications, Network Function Virtualization services, Mobile Edge computing, etc.) are challenging the classic approach of deploying a few large data centers to provide cloud services. A massively distributed Cloud-Edge architecture could better fit the requirements and constraints of these new trends by deploying on-demand infrastructure services in Point-of-Presences within backbone networks. A key feature in this context is the establishment of connectivity among several virtual infrastructure managers in charge of operating, each one, a subset of the infrastructure. After explaining the networking challenges related to distributed Cloud-Edge infrastructures, this article surveys and analyzes the characteristics and limitations of existing technologies in the field of Software Defined Network that could be used to provide the inter-site connectivity feature. This survey is concluded by discussing some research directions