Adaptive load balancing in LTE-Advanced networks with base station coordination

Load balancing(LB) in LTE-Advanced networks with base station coordination is investigated here. Base station coordination allows distributed base stations to act as a single multi-antenna transmitter by sharing the data to be transmitted via a high-capacity low-delay wired backbone. If all base stations coordinate their transmissions to all scheduled users, the interference can be mitigated significantly. An optimization problem is formulated here in which the constraints are physical resource limits and QoS demands and the goal is to minimize the percentage of unsatisfied users in the network and balance the load in the network. The complexity of the problem is analyzed, and suboptimal centralized algorithms are developed. Simulations are done and the results show that the proposed algorithms can significantly enhance the performance of the network by increasing the percentage of satisfied users in the network.