4. The Seventh Category: Advanced Interference Coordination

For the seventh category of multipoint cooperative communication technology, we investigate the interference coordination schemes for the uplink frequency division multiple access (FDMA) cellular network in this chapter. First, we elaborate on the topology of a cellular system and show the interference problem in the uplink FDMA network. Second, we discuss the hard, fractional, and soft frequency reuse schemes, and then we address our motivations to improve the static implementation of soft resource reuse scheme with minimum intercell CSI exchanges. Third, we propose an advanced interference coordination scheme that consists of six steps with the key design lying in the enhanced user equipment (UE) categorization and resource-access control policies. In order to verify the effectiveness of the proposed scheme, we resort to the approach of system-level simulation, the methodology and implementation of which are addressed in great details. From the simulation results, it can be observed that compared with the conventional schemes, the proposed scheme can largely increase the efficiency of the trade-off between the cell-edge throughput and the overall throughput, thus showing high values in the study of interference coordination and application for the uplink FDMA cellular network.