This paper investigates the coordinated multipoint transmission (CoMP) in heterogeneous cellular networks (HCNs) by analyzing a cooperative scheme based on the maximum long-term average received power (MLRP). Using stochastic geometry, the outage probability (OP) and energy efficiency (EE) of a two-tier HCN operating under this scheme are derived, based on which the trade-off between OP and EE is discovered. A novel index named revenue efficiency (RE) is then proposed as a complementary performance measure for the trade-off. Simulation results show the OP-EE trade-off. It also reveal that the suitable trade-off points between OP and EE that will deliver the maximum economic profitability can be found. Tendencies discovered in this paper may provide the operators with opportunities for further optimization in pursuit of economic profitability.
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