BORIS Theses

BORIS Theses
Bern Open Repository and Information System

Seamless Immersion: The Crucial Role of E2E Latency in 6DoF VR Content Delivery

Medeiros de Lima, Alisson Patrick (2024). Seamless Immersion: The Crucial Role of E2E Latency in 6DoF VR Content Delivery. (Thesis). Universität Bern, Bern

24medeiros_ap.pdf - Thesis
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The fifth generation (5G) and sixth generation (6G) mobile communication systems are envisioned to support several low latency applications, such as Virtual Reality (VR), through Ultra-Reliable Low-Latency Communications (URLLC). This thesis provides significant contributions to address the challenges of low latency communications and processing for VR applications. The contributions are categorized into three research areas. First, we investigate a resource provisioning mechanism that guarantees resource availability and prioritization for real-time VR services. Second, we develop an edge framework to orchestrate VR services through offloading and migration strategies considering the requirements of Six Degrees of Freedom (6DoF) VR applications. Lastly, we propose a novel network routing strategy, which optimizes the latency performance for 6DoF VR applications by calculating paths based on their latency requirements. In the first contribution, we show that our solution provides several improvements compared to state-of-the-art solutions, in which we enhance the resource provisioning requests for high-priority VR services, reduce the amount of over-provisioning resources in edge servers, and reduce the overall service outages whenever edge resources become unavailable. In the second contribution, we demonstrate that our solution outperforms widely adopted mechanisms for service migration to reduce End-to-end (E2E) latency in exchange for a moderate increment in power consumption. We also show significant gains in selecting higher video resolutions for 6DoF VR applications based on E2E latency while providing more accepted context migrations. Finally, in the third contribution, we implement and compare state-of-the-art routing algorithms against our proposal. We consider the Key Performance Indicators (KPIs) flow network latency, path latency, over-provisioned latency, E2E latency, flow network throughput, frame rate, video resolutions, and execution time. The proposed approaches in this thesis hold significant importance for the future of VR applications, particularly in reducing latency and enhancing user experiences. With the growing demand for immersive and interactive VR content, achieving ultra-low latency becomes critical. Therefore, the dynamic resource provisioning mechanism, the VR serviceorchestration, and the novel network routing strategy developed in this thesis contribute to overcoming the technical limitations of VR systems and maximizing the potential of edge computing. The findings presented in this thesis offer insights for network operators, service providers, and researchers seeking to advance the state-of-the-art in low latency VR applications.

Item Type: Thesis
Dissertation Type: Cumulative
Date of Defense: 22 February 2024
Subjects: 000 Computer science, knowledge & systems
500 Science
500 Science > 510 Mathematics
Institute / Center: 08 Faculty of Science > Institute of Computer Science (INF)
Depositing User: Hammer Igor
Date Deposited: 03 Jun 2024 13:35
Last Modified: 03 Jun 2024 13:35

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