… serving user … user association in the HetNet that allows users associate with different BSs
in downlink and uplink since it induces the flexibility in user association that may improve users…

… In this paper, we focus on multitier heterogeneous networks which … First, heterogeneous
networks can enhance spectral efficiency by … In a multitier heterogeneous network, users can …

… network models in the literature. In this FD HetNet model, we propose a decoupled generalized
user association (DGUA) scheme and use … rateoptimal user association (DROA) scheme …

… focus on the user association problem in multi-tier cellular networks (ie, networks that consist
of … transmission, ie, decoupled user association (DUA) [4]. In addition, we aim at optimizing …

… a heterogeneous network (HetNet) containing primary users (PUs) and secondary users (…
2) We propose a user association and power control scheme to optimize the uplink EE of SUs. …

… model is proposed in which all users and base stations are modeled using Poisson point …
ratio optimal user association scheme is characterized. Based on the user association scheme, …

… We consider a two-tire HetNet with half duplex (HD) massive multiuser multiple-input
multiple-output (MIMO) macrocell base stations (MBSs) to relax the coverage reduction, FD small …

… as user association, load balancing, scheduling and interference management are considered
for future networks … In heterogeneous networks (HetNets), however, different types of BSs …

… network, we formulate a joint UL and DL user association problem (with provisioning for
decoupled association) that maximizes the sum-rate for UL and DL transmission of all users. …

… in downlink cellular networks. Besides, mm-wave has the advantage of large bandwidth, and
short coverage range also makes it a good application in heterogeneous networks. Niu et al…