Evaluating multi-connectivity in 5G NR systems with mixture of unicast and multicast traffic

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The future 5G New Radio (NR) systems are expected to support both multicast and unicast traffic. However, these traffic types require principally different NR system parameters. Particularly, the area covered by a single antenna configuration needs to be maximized when serving multicast traffic to efficiently use system resources. This prevents the system from using the maximum allowed number of antenna elements decreasing the inter-site distance between NR base stations. In this paper, we formulate a model of NR system with multi-connectivity capability serving a mixture of unicast and multicast traffic types. We show that multi-connectivity enables a trade-off between new and ongoing session drop probabilities for both unicast and multicast traffic types. Furthermore, supporting just two simultaneously active links allows to exploit most of the gains and the value of adding additional links is negligible. We also show that the service specifics implicitly prioritize multicast sessions over unicast ones. If one needs to achieve a balance between unicast and multicast session drop probabilities, explicit prioritization mechanism is needed at NR base stations.

Original languageEnglish
Title of host publicationWired/Wireless Internet Communications - 17th IFIP WG 6.2 International Conference, WWIC 2019, Proceedings
EditorsMarco Di Felice, Enrico Natalizio, Raffaele Bruno, Andreas Kassler
PublisherSpringer Verlag
Number of pages11
ISBN (Print)9783030305222
Publication statusPublished - 2019
Publication typeA4 Article in conference proceedings
EventIFIP WG 6.2 International Conference on Wired/Wireless Internet Communications - Bologna, Italy
Duration: 17 Jun 201918 Jun 2019

Publication series

NameLecture Notes in Computer Science
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


ConferenceIFIP WG 6.2 International Conference on Wired/Wireless Internet Communications


  • 5G cellular systems
  • Multi-connectivity
  • Multicasting
  • New Radio
  • Resource utilization
  • Session drop probabilities

Publication forum classification

  • Publication forum level 1

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Computer Science(all)


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