Resource allocation in 5G heterogeneous networks with downlink‐uplink decoupled access

Abstract

Fifth‐generation (5G) heterogeneous network (HetNet) with downlink (DL) and uplink (UL) decoupled cell association strategy is a promising solution to challenges faced in fourth‐generation (4G) HetNet, ie, mitigating interference, addressing traffic imbalances, and enhanced sum‐rate. This work carries out performance analysis of 4G HetNet with DL and uplink coupled (DUCo) access scheme vs 5G HetNet with DL and UL decoupled (DUDe) access scheme employing outer approximation and heuristic algorithms. First, a mathematical model, mixed integer nonlinear programming (MINLP) problem, is formulated for DUCo access and DUDe access schemes considering cell association, addressing user traffic imbalances, mitigating interference, and sum‐rate maximization in HetNet. Then, the formulated problem is solved, employing outer approximation algorithm (OAA) to find near optimal solution. Similarly, heuristic algorithms are developed for DUCo access and DUDe access schemes considering cell association, addressing user traffic imbalances, mitigating interference, and sum‐rate maximization in HetNet. Detailed performance analysis of DUCo access and DUDe access schemes is done by comparing results employing OAA and heuristic algorithms. Simulation results have shown that proposed DUDe access scheme outperforms DUCo access scheme in HetNet in term of cell association, addressing user traffic imbalances, mitigating interference, and sum‐rate maximization.

Performance analysis of 5G heterogeneous networks under the impact of aggregate interference over Nakagami‐m fading channels

“…5G cellular networks are commonly assumed to address many challenges that 4G does not seem to address effectively. These challenges include higher capacity, higher data rates, lower end‐to‐end latency, massive connectivity of devices, decreased costs, improved experience quality (QoE), and quality of service (QoS) 1‐4 …”

“…These challenges include higher capacity, higher data rates, lower end-to-end latency, massive connectivity of devices, decreased costs, improved experience quality (QoE), and quality of service (QoS). [1][2][3][4] The design of 5G wireless networks needs to change considerably to meet the increasing traffic requirements due to the increased number of users. Heterogeneous networks (HetNets) are going to be a very important technology for the next generation of cellular networks rather than traditional homogeneous networks, Figure 1.…”

Impact of fractional power control on downlink uplink decoupled‐based HetNets in varying path loss exponent environment

“…For analysis and simulation purpose, we have considered an interference‐limited (no noise), two‐tier network with , , (shadowed urban cellular environment for MBS tier), dBm, BS tranmit ratio and 160 and UE tranmit power at dBm. For results, we have considered two PLE ratios () 1,49 which represent urban and shadowed urban cellular environments for SBS tier [50]. Most importantly, we have considered open‐loop uplink power control with various PCF values (), where refers to UE transmitting at maximum transmit power and refers to complete pathloss compensation.…”

Multi‐objective strategy‐based resource allocation and performance improvements in 5G and beyond wireless networks

“…Kim 22 introduced a methodological system design with an optimization algorithm that targets to improve connection density, latency, and capacity in 5G communication system. Through the outer approximation and empirical algorithm, Khan et al 23 made a performance study between 4G and 5G HetNet with DL and UL decoupled (DUDe) access scheme. Cluster‐based load balancing in UE is stated by Aruna Kumari et al 24…”