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We propose a distributed transmission power control method based on soft fractional frequency reuse (SFR) for cellular downlink orthogonal frequency division multiple access (OFDMA). The proposed method adaptively controls the transmission power density in the protected and non-protected bands of SFR depending on the user distribution within a cell in order to maximize the geometric mean of the user...
This paper proposes a new user association method to maximize the downlink system throughput in a cellular network, where the system throughput is defined based on (p, α)-proportional fairness. The proposed method assumes a fully decentralized approach, which is practical in a real system as complicated inter-base station (BS) cooperation is not required. In the proposed method, each BS periodically...
This paper proposes an inter-cell interference coordination (ICIC)-parameter-adjustment method for wireless heterogeneous cellular networks (HetNet), in which low-power nodes (such as pico base stations (BSs)) are overlaid with conventional high-power macro BS deployment. The fractional radio resource reuse (resource partitioning) scheme adopted for HetNet promises to mitigate interference from high-power...
In this paper, we investigate the impact of channel estimation error on LTE-Advanced (LTE-A) uplink using coordinated multipoint (CoMP) joint reception (JR) in a heterogeneous network (HetNet). The uplink CoMP capacity in bits/sec/Hz/m2 in principle increases in proportional to the number/density of CoMP reception points (RPs). However, the data capacity is limited due to reference signal (RS) capacity...
This paper investigates leakage-based precoding schemes that support coordinated multi-point (CoMP) operation for Long-Term Evolution (LTE) systems studied in the 3rd Generation Partnership Project. CoMP operation, which improves cooperative transmission among cells and reduces or eliminates intercell interference, enables performance improvement in cell edge and average throughputs. Although leakage-based...
This paper proposes an inter-cell co-channel interference (CCI) mitigation method with the mixed deployment of evolved NodeBs (eNBs) and relay nodes (RNs) for Long Term Evolution (LTE)-Advanced systems studied in the 3rd Generation Partnership Project (3GPP). Supporting RNs for LTE-Advanced can increase coverage in areas without service, and also improve system capacity. Although RNs can improve system...
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