Online Distributed User Association for Heterogeneous Radio Access Network.

Area of Science:

• Telecommunications Engineering
• Wireless Communication Networks

Background:

• Future-generation radio access networks (RAN) will utilize heterogeneous network (HetNet) environments to meet diverse user equipment (UE) demands.
• Integrating multiple radio access technologies (RAT) like 2G, 3G, 4G, WLAN, and VLC is essential for HetNets.
• Traditional user association schemes (e.g., max-SINR/max-RSSI) are inadequate for HetNets, leading to base station (BS) load imbalance.

Purpose of the Study:

• To devise a novel joint-user association scheme for load balancing in densely deployed, dynamic HetNets.
• To address the challenge of load imbalance in HetNets with mobile UEs and varying channel conditions.
• To improve overall network performance by ensuring fairness in received data rates and enhancing the minimum data rate for UEs.

Main Methods:

• Development of two complex, distributed association schemes based on probability and d-choices.
• Consideration of dynamic network conditions, including UE mobility and fluctuating channel quality.
• Jointly optimizing BS load and the signal-to-interference-plus-noise ratio (SINR) experienced by UEs.

Main Results:

• The proposed schemes effectively balance the load among base stations in a dynamic HetNet environment.
• Numerical results demonstrate significant fairness in received data rates among UEs.
• An improvement in the minimum received data rate for UEs was observed, validating the scheme's efficiency.

Conclusions:

• The novel joint-user association schemes provide an efficient solution for load balancing in future HetNets.
• The proposed methods enhance UE experience by ensuring fair and improved data rates.
• This work contributes to the advancement of robust and efficient wireless network management.