SINR-Constrained Joint Scheduling and Optimal Resource Allocation in VLC Based WPAN System

Ratan Kumar Mondal, Nirzhar Saha, Nam Tuan Le, Yeong Min Jang*

*Corresponding author for this work

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A joint scheduling and optimal resource allocation scheme for wireless personal area network using visible light is proposed. In current IEEE 802.15.7 standard, multiple channel scheduling in medium access control (MAC) layer and variable data rate opportunity in physical layer (PHY) are performed separately. Therefore, the resources are not utilized effectively owing to the exclusion of channel variable characteristics during the scheduling. In this paper, the case for combining the PHY and MAC layer into a cross-layer platform is conducted for utilizing the resources efficiently. Generally in visible light communication (VLC) system, data rate of one link impacts on its neighbor link due to their high signal-to-noise ratio and this impact varies gradually according to some perspectives such as, field-of-view interaction and distance, hence allocated rate of both users could be dissipated. Moreover, the cell radius in VLC system is small compared with other small cell network and users from adjacent cells impact on transmission link which arises co-channel interference. To solve these problems, a novel joint scheduling and rate allocation (JSRA) algorithm associated with throughput maximization and channel-state has been proposed in VLC scenario. The objective of JSRA model is, each channel can determine the feasibility of its rate which always intends to increase, by exploiting the constraint value of signal-to-interference-plus-noise ratio (SINR) of that scheduled channel. The results show that the performance of joint control approach increases the total system average throughput and the spectral efficiency.

Original languageEnglish
Pages (from-to)1935-1951
Number of pages17
JournalWireless Personal Communications
Volume78
Issue number4
DOIs
Publication statusPublished - 7 Oct 2014
Externally publishedYes

Keywords

  • Cross-layer
  • Rate allocation
  • Scheduling
  • SINR
  • Spectral efficiency
  • Visible light communication
  • WPAN

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