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Joint admission control, cell association, power allocation and throughput maximization in decoupled 5G heterogeneous networks

Author

Listed:
  • Humayun Zubair Khan

    (National University of Sciences and Technology)

  • Mudassar Ali

    (National University of Sciences and Technology
    University of Engineering and Technology)

  • Muhammad Naeem

    (COMSATS University Islamabad, Wah Campus)

  • Imran Rashid

    (National University of Sciences and Technology)

  • Adil Masood Siddiqui

    (National University of Sciences and Technology)

  • Muhammad Imran

    (National University of Sciences and Technology)

  • Shahid Mumtaz

    (Instituto de Telecomunicações Campus Universitário de Santiago
    Universidad Antonio de Nebrija)

Abstract

Downlink (DL)-uplink (UL) coupled cell association scheme was adopted in 3rd generation (3G) homogeneous network and 4th generation (4G) heterogeneous network (HetNet). In the coupled cell association scheme, a user is associated to single base station (BS) in DL & UL based on the strongest received signal power (SRSP) in DL from a macro base station (MBS) and multiple small base stations (SBS) in HetNet. This is a sub-optimal solution for cell association as most of the users are associated to a MBS due to dominant transmit power and brings challenges like multiple interference issues and imbalanced user traffic load which leads to a degraded throughput in HetNet. In this paper, we investigate downlink uplink decoupled cell association scheme to address these issues and formulate a sum-rate maximization problem in terms of admission control, cell association and power allocation for MBS only, coupled and decoupled HetNet. The formulated optimization problem falls into class of a mixed integer non linear programming (MINLP) problem which is NP-hard and requires exhaustive search to find the optimal solution. However, computational complexity of the exhaustive search increases exponentially with the increase in number of users. Therefore, an outer approximation algorithm (OAA) is proposed as a solution to find near optimal solution with less computation complexity. Extensive simulations work has been done to evaluate the decoupled cell association scheme in HetNet vs the coupled cell association scheme in traditional MBS only and HetNet. Results show the effectiveness of decoupled cell association scheme in terms of KPIs, such as throughput, addressing user traffic load imbalances and number of users attached.

Suggested Citation

  • Humayun Zubair Khan & Mudassar Ali & Muhammad Naeem & Imran Rashid & Adil Masood Siddiqui & Muhammad Imran & Shahid Mumtaz, 2021. "Joint admission control, cell association, power allocation and throughput maximization in decoupled 5G heterogeneous networks," Telecommunication Systems: Modelling, Analysis, Design and Management, Springer, vol. 76(1), pages 115-128, January.
    • Handle: RePEc:spr:telsys:v:76:y:2021:i:1:d:10.1007_s11235-020-00707-4
    DOI: 10.1007/s11235-020-00707-4
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    References listed on IDEAS

    as
    1. Sundus Ali & Muhammad Imran Aslam & Irfan Ahmed, 2019. "Uplink coverage probability and spectral efficiency for downlink uplink decoupled dense heterogeneous cellular network using multi-slope path loss model," Telecommunication Systems: Modelling, Analysis, Design and Management, Springer, vol. 72(4), pages 505-516, December.
    2. Muhammad Nadeem Sial & Junaid Ahmed, 2018. "Analysis of K-tier 5G heterogeneous cellular network with dual-connectivity and uplink–downlink decoupled access," Telecommunication Systems: Modelling, Analysis, Design and Management, Springer, vol. 67(4), pages 669-685, April.
    3. Mohammad Arif & Shurjeel Wyne & Junaid Ahmed, 2019. "Performance analysis of downlink and uplink decoupled access in clustered heterogeneous cellular networks," Telecommunication Systems: Modelling, Analysis, Design and Management, Springer, vol. 72(3), pages 355-364, November.
    Full references (including those not matched with items on IDEAS)

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