Multi-objective optimization of CoMP-based MIMO-OFDMA networks with frequency reuse

Recent years have seen an upsurge in novel techniques to satisfy the ambitious requirements of modern wireless cellular systems in terms of area spectral efficiency whereby users located anywhere in the cell, even at the edge, should be able to obtain reasonably large throughputs. In particular, interference cancellation techniques based on different forms of frequency reuse (FR) and coordinated multipoint transmission (CoMP) have shown great potential to realize such goal. This paper proposes a framework to evaluate the combination of FR and CoMP from a multi-objective performance point of view, where different metrics related to capacity and fairness can be incorporated. This framework rests upon a physical layer abstraction derived for the particular case of block diagonalization (BD)-based MIMO processing, a widely used technique known to perform close to optimality yet remaining computationally simple. Numerical results show that the design of the FR parameters play a key role in the overall network performance and suggest the use of utility-based functions combining various metrics as a suitable mechanism to conduct this optimization.