rm power budget calculations. The output path loss is very closely related to two parameters: transmitted power of Radio Network Planning and Optimisation the transceivers and sensitivity of the receivers. There is no need to increase output power if the sensitivity of the receiver from the other side is not high enough to detect this power. Many mechanisms exist to enhance coverage in both uplink and downlink directions while maximising the path loss: increase output power using boosters; increase sensitivity using mast head amplifiers (MHAs); use higher gain antennas, preferably directional; reduce multipath fading using diversity at the receiver end; lower the received signal threshold; reduce cable loss using thicker and shorter feeders; bypassing combiners. Boosting Power Some features help to boost the power beyond the initial transmitter capacity. Extended Cell When there are environmental constraints preventing building on more sites, the extended cell feature can be used as a coverage enhancement solution. The serving area of a normal cell is 0-35 km while an extended cell serves the area of, for example, 33-70 km. This option is excellent in rural areas with low population and special coverage situations, such as archipelagos. One main normal transceiver plus one extended transceiver are used to make the output power double. The implementation of the extended cell is based on one TRX serving the normal area and the other TRX (E-TRX) serving the extended area. This solution is cost effective in the sense that it saves new site deployment. Smart Radio Concept This feature is based on two parallel mechanisms: intelligent diversity in the downlink and four-way diversity in the uplink. The basis uses two physical TRXs to carry the same traffic in the DL and four antennas for reception in the UL. Indoor Coverage Indoor coverage improvement remains the most challenging planning achievement. In hotspot indoor locations, operators increase the coverage in order to intercept all possible traffic. Due to different