QoS-RCC: um mecanismo com orquestração de sobre-provisionamento de recursos e balanceamento de carga para roteamento orientado a QoS na internet do futuro
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Data
2011-02-18
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Universidade Federal de Goiás
Resumo
The Future Internet concepts and designs of 4WARD project concerns a clean-slate
architecture with various networking innovations, including a new connectivity paradigm
called Generic Path (GP). In GP architecture, several facilities are designed to efficiently
support complex value-added applications and services with assured Quality of Service
(QoS).
GPs mainly abstract underlying network heterogeneity, and any entity, regardless its scope
(technology, location or architectural layer) communicate each other in a single way via
a common interface. To that, cooperation with network-layer provisioning mechanisms
is required in the sense to map data paths meeting session-demanded resources (QoS
requirements - minimum bandwidth and maximum delay/loss experience) into appropriate
GPs. In contrast as support today, robust and scalable QoS-provisioning facilities are
strongly required for efficient GP allocations.
Therefore, this dissertation introduces the QoS-Routing and Resource Control (QoSRRC),
a set of GP-compliant facilities to cope with the hereinabove requirements. QoSRRC
complements GP architecture with QoS-oriented routing, aided with load balancing,
to select paths meeting session-demands while keeping residual bandwidth to increase
user experience. For scalability, QoS-RRC operates based on an overprovisioning-centric
approach, which places low state storage and network operations.
Initial QoS-RRC performance evaluation was carried out in Network Simulator v.2 (NS2),
demonstrating drastic improvements of flow delay experience and bandwidth use among a
relevant state-of-the-art solution. Moreover, the impact of QoS-RRC compared to current
IP QoS and routing standards on the user experience has been evaluated, by analysing
main objective and subjective Quality of Experience (QoE) metrics, namely Peak Signal
to Noise Ratio (PSNR), The Structural Similarity Index (SSIM), Video Quality Metric
(VQM) and Mean Opinion Score (MOS).
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FREITAS, Leandro Alexandre. QoS-RCC: um mecanismo com orquestração de sobre-provisionamento de recursos e balanceamento de carga para roteamento orientado a QoS na internet do futuro. 2011. 78 f. Dissertação (Mestrado em Ciência da Computação) - Universidade Federal de Goiás, Goiânia, 2011.