Abstract
Abstract In this paper, we 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 multipoint transmission (CoMP). However, the CoMP scheme cannot control the CCI generated from outside coordination boundaries. To resolve this problem, we propose a partial activation strategy by using RRHs deployed near cell edge which results in moving coverage boundary effects. Based on Monte Carlo system level simulations, performance of the conventional strategies and the presented strategy is evaluated. Simulation results show that the proposed scheme outperforms the enhanced inter-cell interference coordination and CoMP schemes especially for users located near cell edge areas.
Highlights
Limited capacity and coverage holes have been considered as major problems of conventional mobile cellular wireless systems which only consist of homogeneous macro base stations (BSs) [1]
The conventional systems have been evolved to heterogeneous network (HetNet) systems for which different types of transmission nodes are newly deployed within a coverage area of the macro BS
co-channel interference (CCI) problems still exist for the user equipments (UEs) located at coverage boundaries of a cluster of transmission nodes participating in the coordinated multipoint transmission (CoMP) [8,9]
Summary
Limited capacity and coverage holes have been considered as major problems of conventional mobile cellular wireless systems which only consist of homogeneous macro base stations (BSs) [1]. CCI problems still exist for the UEs located at coverage boundaries of a cluster of transmission nodes participating in the CoMP [8,9]. By means of designing the virtual coverage area to be larger than the area where scheduling candidate UEs are located, our proposal efficiently mitigates inter-cell interference from the transmission nodes with different CIDs. Performance of the conventional and presented strategies is evaluated by Monte Carlo system level simulations to demonstrate the effectiveness of the proposal.
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