Secure resource management in beyond 5G heterogeneous networks with decoupled access

• Published in: Ad hoc networks Vol. 125; p. 102737
• Main Authors: Khan, Humayun Zubair, Ali, Mudassar, Naeem, Muhammad, Rashid, Imran, Mumtaz, Shahid, Khan, Adnan Ahmad, Akhtar, Ahmad Naeem
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.02.2022
• Subjects: Decoupled access; Heterogeneous network; Millimetre wave; MINLP; Secrecy rate; MINLP; Decoupled access; Millimetre wave; Secrecy rate; Heterogeneous network
• ISSN: 1570-8705; 1570-8713
• DOI: 10.1016/j.adhoc.2021.102737

Coverage, capacity and throughput can be enhanced significantly by offering a hybrid solution consisting of microwave (μW) high power base station (HPB) underlaid millimetre wave (mW) low power base station (LPB) augmented by downlink uplink decoupled (DU-De) user association strategy in N-tier heterogeneous networks (HetNets). Presence of diversity in the HetNets pave the way for marlacious attacks by eavesdropper to wiretap the channel of legal users. However, secure user association, power and μW & mW sub-carriers allocation employing DU-De strategy has not been investigated in the past. We formulates mathematical models for DU-De strategy and downlink uplink coupled (DU-Co) strategy to investigate secure user association, power and sub-carrier in μW and mW band allocation for secrecy rate maximization in N-tier HetNets. The nature of formulated problems is complex, challenging and NP-hard. We have used ɛ-optimal algorithm to solve the formulated problems and achieve ɛ-optimal solution. Extensive simulation results in terms of secure user association and average secrecy rate show the effectiveness of the DU-De strategy over the DU-Co strategy in HetNets.