Downlink Transmission Optimization Framework
This paper presents an optimization framework for downlink transmission parameters of mobile cellular systems. A typical network optimization approach is to divide the network into disjoint clusters of Base-Stations (BS). Optimization is then performed within each cluster for important parameters such as transmit power, pre-coder, etc. This approach is widely adopted in academic research and industrial standard bodies, e.g. 3GPP LTE-Advanced. While reducing the optimization complexity, this strategy suffers from a performance limit due to interference from the nodes outside cluster. The authors thus propose a framework to overcome this limit by allowing clusters to exchange their parameters and optimization information via low-rate and nonzero delay backhauls.