Online Precoding Design for Downlink MIMO Wireless Network Virtualization with Imperfect CSI

Juncheng Wang, Min Dong, Ben Liang, Gary Boudreau

Research output: Chapter in book/report/conference proceedingConference proceedingpeer-review

6 Citations (Scopus)

Abstract

We consider online downlink precoding design for multiple-input multiple-output (MIMO) wireless network virtualization (WNV) in a fading environment with imperfect channel state information (CSI). In our WNV framework, a base station owned by an infrastructure provider (InP) is shared by several service providers (SPs) that are oblivious to each other. The SPs design their virtual MIMO transmission demands to serve their own users, while the InP designs the actual downlink precoding to meet the service demands from the SPs. Therefore, the impact of imperfect CSI is two-fold, on both the InP and the SPs. We aim to minimize the long-term time-averaged expected precoding deviation, considering both long-term and short-term transmit power limits. We propose a new online MIMO WNV algorithm to provide a semi-closed-form precoding solution based only on the current imperfect CSI. We derive a performance bound for our proposed algorithm and show that it is within an O(δ) gap from the optimum over any given time horizon, where δ is a normalized measure of CSI inaccuracy. Simulation results with two popular precoding techniques validate the performance of our proposed algorithm under typical urban micro-cell Long-Term Evolution network settings.
Original languageEnglish
Title of host publicationINFOCOM 2020 - IEEE Conference on Computer Communications
PublisherIEEE
Pages1211-1220
Number of pages10
ISBN (Electronic)9781728164120
ISBN (Print)9781728164137
DOIs
Publication statusPublished - Jul 2020
Event38th IEEE Conference on Computer Communications, IEEE INFOCOM 2020 - Toronto, Canada
Duration: 6 Jul 20209 Jul 2020

Publication series

NameProceedings of IEEE Conference on Computer Communications
PublisherIEEE
Volume2020-Jul
ISSN (Print)0743-166X
ISSN (Electronic)2641-9874

Conference

Conference38th IEEE Conference on Computer Communications, IEEE INFOCOM 2020
Country/TerritoryCanada
CityToronto
Period6/07/209/07/20

User-Defined Keywords

  • MIMO
  • Wireless network virtualization
  • Imperfect CSI
  • Lyapunov optimization
  • Precoding design

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