Adaptive De-Coupling and Multi-BS Association in Heterogeneous Networks

This paper proposes a novel method for maximizing
the spatial frequency reuse in cellular networks by exploiting the
possibility to simultaneously associate each user to multiple basestations
(BSs). To this end, the proposed technique presents a
criterion for determining when a user should be associated with
one or more BSs and whether the uplink and downlink should be
decoupled, based on minimizing the average interference power
across the network. To minimize the effect of interference that
may occur due to increasing the spatial frequency reuse, the
proposed association methods are integrated with an overlap
checking scheme to insure that the resources are orthogonalized
between the interfering BSs/UEs. The results show that significant
performance improvements can be attained by the proposed
scheme in comparison with other benchmark techniques.