A Distributed Inter-Cell Interference Coordination Scheme in Downlink Multicell OFDMA Systems

Abstract

In this paper, the inter-cell interference coordination (ICIC) is investigated for the downlink transmission in OFDMA-based multi-cellular systems. The utility function is introduced to balance efficiency and fairness. Firstly, the system model is built based on the resource allocation rules of soft frequency reuse (SFR) and the utility-based optimization problem is formulated. Secondly, the problem is simplified and analyzed in the 3-cell layout to obtain a local optimizing allocation rule. Thirdly, a distributed heuristic ICIC scheme is developed in which a part of the spectrum is defined to be the spectrum pool. Cells make occupation decisions of the spectrum pool according to locally available information of traffic load. The proposed scheme has little signaling overhead and low complexity. Simulation results validate it can improve the cell edge throughput performance effectively.

Utility-based resource allocation for interference limited OFDMA cooperative relay networks

“…Inter-cell interference have been considered in [7]. This paper assumes cooperation between neighboring base stations (BSs).…”

Interference Management in Lte Downlink Networks

“…For practical implementation, the coordinated-distributed scheme is more efficient because it has distinct pros over the semi-distributed approach such as minimizing time and signalling overhead due to the systematic communication between eNBs and central controller, lessening the complexity of network infrastructure as central controller is eliminated here. Some examples of coordinated-distributed schemes reported in the literature can be found in [31][32][33][34][35]. Fig.…”

A Survey on Inter-Cell Interference Coordination Techniques in OFDMA-Based Cellular Networks

“…3) S = T CD eN B (r 1 , r 2 , f) Schemes: Kun et al proposed in [34], a distributed semi-static heuristic ICIC scheme based on the resource allocation rules of SFR in which the spectrum is divided into four partitions as illustrated in Figure 14. Each three neighboring cells are grouped to form a cluster, and each cell is assigned one partition to be used only by it as its major sub-band.…”