Uplink-oriented deployment guidelines and optimization in W-CDMA heterogeneous networks

The operation of wireless cellular networks can be efficiently supported by secondary small cells that are on-demand deployed in traffic hotspots within the coverage area of primary macro cells. Assuming shared communication channels and the uplink communication mode, this study defines deployment guidelines and self-configuration algorithms that enable the coexistence of both the primary and the secondary cell tiers by ensuring a predefined signal-to-interference-and-noise ratio (SINR) for all active transmissions. To this end, solutions to the problems of base station placement, cell coverage optimization, and target SINR adaptation are discussed as well as their compatibility with downlink-oriented deployment guidelines. The analytical framework is accompanied by 3GPP-compliant simulations.