Online Distributed Coordinated Precoding for Virtualized MIMO Networks With Delayed CSI

Juncheng Wang, Ben Liang*, Min Dong, Gary Boudreau, Hatem Abou-Zeid

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review


We consider online wireless network virtualization in a multi-cell multiple-input multiple-output system with delayed feedback of channel state information (CSI). Multiple service providers (SPs) simultaneously share the base station resources of an infrastructure provider (InP). We aim at minimizing the accumulated precoding deviation of the InP’s actual precoder from the SPs’ virtualization demands via managing both inter-SP and inter-cell interference, subject to both long-term and short-term per-cell transmit power constraints. We develop an online coordinated precoding solution and show that it provides provable performance bounds. Our precoding solution is fully distributed at each cell, based only on delayed local CSI. Furthermore, it has a closed-form expression with low computational complexity. Simulation results demonstrate the substantial performance gain of our precoding solution over the current best alternative.
Original languageEnglish
Pages (from-to)1012-1016
Number of pages5
JournalIEEE Wireless Communications Letters
Issue number5
Early online date18 Feb 2022
Publication statusPublished - May 2022

User-Defined Keywords

  • Network virtualization
  • delayed CSI
  • Coordinated precoding
  • Online optimization
  • Distributed algorithm


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