… ABSTRACT Ultra-dense heterogeneous networks (… resource management in UDHN is
still an open research problem. In this article, a Q-learning based radio resource management …

… 1.1 Related Work According to the above advantages of RIS, resource allocation (RA)
problems for RIS-assisted networks have been concerned by many scholars. For example, the …

… the extent of having one femtocell network in every room of a … used to allocate resources
for all users inside each cluster, … power allocation by utilizing CoMP transmission in a two-tier …

… mitigation by using OFDMA in macrofemto network. In … and user clustering techniques
in interference coupled multi-… Consider a two tier downlink scenario, where MBS and FBS …

… increase capacity of the network. Ultra-dense heterogeneous cellular networks play a critical
… Graph-based femtocell enhanced universal resource allocation strategy for LTE-A HetNets. …

… km area, consisting of Femto-cells (crosses) and Macrocells (… networks, we plot and compare
the performance of a two-tier … their advantages over conventional OFDM systems. Also, we …

… femtocell (CFC) includes the cognitive principle in a two-tier … The nearby femtocells form
cluster known as coordinated multi… Luo, “Dynamic spectrum allocation for the downlink of OFDMA…

… Figure 2 shows a simple two-tier network in which the users are assigned to either femtocell
or the core … The OFDMA network is capable of serving 100 cellular users using orthogonal …

… to a two-tier network called heterogeneous network. As a portable device, femtocell base …
problem has been solved using cluster-based method by optimizing the min-max formula. …

… In dense femtocell networks, a centralized resource allocation … a semi-distributed cluster
scheme that allocates resources … self-optimizing of OFDMA femtocells was proposed. Utilizing …