Load & backhaul aware decoupled downlink/uplink access in 5G systems

Hisham Elshaer, Federico Boccardi, Mischa Dohler, Ralf Irmer

Research output: Chapter in Book/Report/Conference proceedingConference paperpeer-review

33 Citations (Scopus)


Until the 4th Generation (4G) cellular 3GPP systems, a user equipment's (UE) cell association has been based on the downlink received power from the strongest base station. Recent work has shown that - with an increasing degree of heterogeneity in emerging 5G systems - such an approach is dramatically suboptimal, advocating for an independent association of the downlink and uplink where the downlink is served by the macro cell and the uplink by the nearest small cell. In this paper, we advance prior art by explicitly considering the cell-load as well as the available backhaul capacity during the association process. We introduce a novel association algorithm and prove its superiority w.r.t. prior art by means of simulations that are based on Vodafone's small cell trial network and employing a high resolution pathloss prediction and realistic user distributions. We also study the effect that different power control settings have on the performance of our algorithm.

Original languageEnglish
Title of host publicationIEEE International Conference on Communications
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
ISBN (Print)9781467364324
Publication statusPublished - 9 Sept 2015
EventIEEE International Conference on Communications, ICC 2015 - London, United Kingdom
Duration: 8 Jun 201512 Jun 2015


ConferenceIEEE International Conference on Communications, ICC 2015
Country/TerritoryUnited Kingdom


  • 5G
  • Backhaul Capacity
  • Downlink and Uplink Decoupling
  • Heterogeneous Networks
  • Load-Balancing


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