User Association in 5G HetNets

Mobile networks of the fifth generation (5G), which will consume less energy and offer better quality of service (QoS), are anticipated to accommodate the enormous volume of data traffic. The key enabling technologies like mmWave methods, large multiple-input multiple-output networks, and heterogeneous networks (MIMO) are highlighted to achieve this. Regardless of the technology employed, a user association mechanism is required to determine if a user is linked to a given base station (BS) prior to transfer. User Association is essential for improving the network's load balancing, spectrum utilization, and energy efficiency. The subsequent significant development in mobile communications standards is 5G, which will follow the next 4G standards. Due to 5G technology, most high-bandwidth consumers’ access to their phones will change. To better utilize the services, User Association enables the mapping of User Equipment to base stations. However, the channel fluctuations in a mmWave system might be quick and unexpected, potentially making centralized user association ineffective. An effective distributed matching algorithm must be created and customized for user association in 5G Heterogeneous networks.