Resource Allocation in 6G Optical Wireless Systems

TL;DR

This paper explores resource allocation in 6G optical wireless systems, focusing on wavelength division multiple access in VLC, optimizing AP and wavelength assignment to maximize SINR across various indoor environments.

Contribution

It introduces a MILP model for optimal resource allocation in VLC systems supporting multiple users, considering different environments and advanced hardware components.

Findings

Optimized resource allocation improves SINR and user support.

Different indoor environments affect resource allocation strategies.

Use of laser diodes and ADR enhances system performance.

Abstract

The abundant optical spectrum is a promising part of the electromagnetic spectrum for 6G communication systems. The visible light spectrum which is a part of the optical spectrum, can be used to provide communication and illumination simultaneously. Visible light communication (VLC) systems have been widely researched, however, little work has focused on the area of multiple access. This chapter studies wavelength division multiple access (WDMA) techniques in VLC systems to support multiple users. In addition, the optimization of resource allocation is considered in this chapter by developing a mixed-integer linear programming (MILP) model that can be used to maximize the signal to noise and interference ratio (SINR) while supporting multiple users. The optimized resource allocation results in the best assignment of access points (APs) and wavelengths to users. Different indoor environments such as office, data center and aircraft cabins are evaluated in this chapter. A laser diode (LD) with four wavelengths (red, green, yellow and blue) is used to provide high bandwidth for communication and white light for illumination. Also, an angle diversity receiver (ADR) is utilized to receive signals and reduce noise and interference by exploiting the spatial domain.