The Latency Performance Analysis and Effective Relay Selection for Visible Light Networks

Area of Science:

• Wireless Communication
• Network Reliability
• Information Theory

Background:

• Visible Light Communication (VLC) networks face challenges in latency evaluation and core network forwarding for reliable end-to-end communication.
• Link blockages in VLC impact service processes and latency, necessitating advanced analytical frameworks.

Purpose of the Study:

• To develop a latency-bounded reliability analysis framework for VLC networks.
• To propose an efficient forwarding strategy for core networks to improve data transmission quality.

Main Methods:

• Leveraging martingale theory to construct a martingale of the service process for VLC links.
• Developing a martingale process related to latency, incorporating aggregate arrivals and random service characteristics.
• Defining a stopping time event for latency and utilizing stopping time theory to derive an upper bound for latency-related unreliability.
• Proposing a dynamic forward backhaul framework with a relay selection algorithm based on back-pressure theory for the core network.

Main Results:

• A tight upper bound for latency-related unreliability in VLC networks was derived using stopping time theory.
• The proposed dynamic forward backhaul framework and relay selection algorithm demonstrated improved data transmission quality in the core network.
• Simulation results validated the effectiveness of the theoretical latency-bounded reliability analysis framework.

Conclusions:

• The developed martingale-based framework provides an effective method for analyzing latency-bounded reliability in VLC systems.
• The proposed core network forwarding strategy enhances data transmission quality, particularly under data-intensive conditions.
• The study successfully integrates wireless access network analysis with core network forwarding strategies for improved end-to-end network reliability.