Average Rate Achievable in K-Tier Downlink Heterogeneous Cellular Networks
Cellular networks are becoming increasingly heterogeneous due to the co-deployment of many disparate infrastructure elements, including micro, pico and femtocells, and distributed antennas. This introduces new challenges in the modeling, analysis, and design of these networks. While grid-based models have been quite popular in modeling classical macrocell networks, they are both analytically intractable and have limited applicability to Heterogeneous Cellular Networks (HCNs). The authors propose a flexible, accurate and tractable model for a general downlink HCN consisting of K tiers of randomly located BSs, where each tier may differ in terms of average transmit power, supported data rate, and BS density.