Interference Coordination of Heterogeneous LTE Systems Using Remote Radio Heads
In this paper, the authors present an operational strategy to mitigate Co-Channel Interference (CCI) by using geographically distributed Remote Radio Heads (RRHs). The inter-node CCI becomes a dominant performance degradation factor for Heterogeneous Network (HetNet) systems. Recently, there are emerging attempts in Third Generation Partnership Project to adopt advanced techniques to Long Term Evolution Advanced systems to mitigate CCI problems for HetNet systems, namely, the Coordinated Multi-Point transmission (CoMP). However, the CoMP scheme cannot control the CCI generated from outside coordination boundaries. To resolve this problem, they propose a partial activation strategy by using RRHs deployed near cell edge which results in moving coverage boundary effects.