Interference analysis in a LTE-A HetNet scenario: Coordination vs. uncoordination

The electromagnetic spectrum is a scarce resource that needs to be efficiently and effectively reused to allow the provider the necessary conditions to satisfy its customers increasing demands. It is vital that the reuse of the spectrum does not lead to high interference scenarios. The use of heterogeneous networks (HetNets) allows a better spatial reuse of the spectrum. However it also leads to higher interference scenarios. Thus, it is necessary to create tools that help to mitigate the interference, increasing the effectiveness of spectrum reuse. This paper evaluates interference-coordination algorithms based on game theory for scenarios with different access policies. The results are given in terms of user and cell throughputs. They show that although the use of closed access policies can benefit from the use of cell-driven algorithms, open access policy is preferential to use with user-driven algorithms, in particular for the increase of the service capacity.