USCH. Each UE basically uses only single PRB on PUCCH and therefore the thermal noise + eNodeB noise figure gives the minimum value for PO_NOMINAL_PUCCH as around -118 dBm. Adding some safety margin (against fading) on top of that we end up having PO_NOMINAL_PUCCH as -114 to -116 dBm depending on the RF conditions (if there is plenty of fast fading then PO_NOMINAL_PUCCH should be set higher otherwise dropped call rate due to the periodical CQI reporting failure will increase). The g(i) is the closed-loop power control part similar to the PUSCH. The RSSI closed-loop decision window should be then set to +2 dB from the PO_NOMINAL_PUCCH+ The SINR closed- loop decision window should be set SO that the minimum SINR is above the 3GPP-defined performance targets as shown in [4]. This means that SINR window should be set to e.g. -1 to 3 dB, depending on the RF conditions. 13.3.3 RACH and RRC Setup Success Rate Figure 13.20 shows the typical performance of interference-limited cell for aggressive uplink power control scenario. Aggressive uplink power control here means that the closed-loop power control tries to maintain 18 dB SINR for each UE and open-loop power control is set conservatively (PO_PUSCH = -100 dBm and alpha (a) = 1) to protect the RRC setup success rate. RACH setup success rate (number of message 3 divided by number of message 1) and RRC setup success rate (number of message 5 divided by number of message 3) collapse when average PUSCH SINR reduces down to 0 dB. The increase in inter-cell interference is first compensated by aggressive closed-loop power control and when the UE has reached the max transmit power the average SINR for the cell reduces while average PUSCH RSSI increases from -90 to -82 dBm. The RACH setup success rate decreases as UEs need to do several rounds of preamble retransmissions with increased preamble transmission power to get message 3 through and receive message 4. Similarly the RRC setup success rate decreases. The number of required preambles per each RRC attempt increases rapidl