Resource Allocation for Cooperative Transmission in Optical Wireless Cellular Networks with Illumination Requirements

Borja Genovés Guzmán, Alexis A. Dowhuszko, Víctor P. Gil Jiménez*, Ana I. Pérez-Neira

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Visible light communication (VLC) often suffers from line-of-sight path blockages and high levels of inter-cell interference. Thus, the analysis and design of cooperation techniques become crucial to address these key impairments. This paper studies the performance of different resource allocation schemes that are suitable for multi-cell cooperative transmission when tri- and tetra-chromatic light-emitting diodes (LEDs) and optical orthogonal frequency-division multiple access are utilized. Firstly, guidelines are derived for maintaining the same spatial distribution of the signal-to-interference-plus-noise ratio (SINR) in every sector of the multi-cell environment in case of stand-alone (non-cooperative) and cooperative transmission. Secondly, the possible resource allocation configurations for both stand-alone and cooperative transmission modes are identified for different LED types and available orthogonal resources (i.e., frequency sub-bands per color and sectors per cell). Finally, the data rate gain of the multiple resource allocation configurations are also analyzed, while verifying the illumination constraints. The obtained results confirm that the proper design of cooperative transmission configurations will be of paramount importance to provide reliable wireless link in ultra-dense VLC deployments.

Original languageEnglish
Article number9144514
Pages (from-to)6440-6455
Number of pages16
JournalIEEE Transactions on Communications
Volume68
Issue number10
DOIs
Publication statusPublished - Oct 2020
MoE publication typeA1 Journal article-refereed

Keywords

  • Coordinated multi-point
  • Illumination requirements
  • Joint transmission
  • Line-of-sight blockage
  • Multi-color LED
  • Resource allocation
  • Ultra-dense deployments
  • Visible light communication

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