Impact of Multi-connectivity on Channel Capacity and Outage Probability in Wireless Networks

Lotte Weedage*, Clara Stegehuis, Suzan Bayhan

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)
44 Downloads (Pure)

Abstract

Multi-connectivity facilitates higher throughput, shorter delay, and lower outage probability for a user in a wireless network. Considering these promises, a rationale policy for a network operator would be to implement multi-connectivity for all of its users. In this paper, we investigate whether the promises of multi-connectivity also hold in such a setting where all users of a network are connected through multiple links in the downlink. In particular, we consider a wireless network where every user connects to its <inline-formula><tex-math notation="LaTeX">$k$</tex-math></inline-formula> closest base stations. Using a framework of stochastic geometry and probability theory, we obtain analytic expressions for per-user throughput and outage probability of <inline-formula><tex-math notation="LaTeX">$k$</tex-math></inline-formula>-connectivity networks under several failure models. In contrast to the conclusions of previous research, our analysis shows that per-user throughput always decreases with increasing <inline-formula><tex-math notation="LaTeX">$k$</tex-math></inline-formula>. However, multi-connected networks are more resilient against failures than single connected networks as reflected with lower outage probability. Moreover, multi-connectivity leads to higher throughput fairness among the users. Consequently, we conclude that rather than implementing multi-connectivity for all users, a network operator should consider it for the users who would benefit from additional links the most, e.g., cell edge users.

Original languageEnglish
Pages (from-to)7973 - 7986
Number of pages14
JournalIEEE transactions on vehicular technology
Volume72
Issue number6
Early online date6 Feb 2023
DOIs
Publication statusPublished - Jun 2023

Keywords

  • Capacity
  • Channel capacity
  • Millimeter wave communication
  • multi-connectivity
  • outage probability
  • Poisson Point Process
  • Power system reliability
  • Probability
  • Reliability
  • reliability
  • Signal to noise ratio
  • Throughput
  • 2023 OA procedure

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