nd data), and the UE power control range is 65 dBm; the minimum TX power is thus -44 dBm. For Uplink Eb/NO target, based on [7] we assume macro-cellular environment: speech 6.1 dB, data 3.1 dB; micro-cellular environment: speech 3.3 dB, data 2.4 dB. The UTRA Transmission System 5.5.4.2.2 SIR Calculation in Uplink We calculate the local mean SIR by dividing the received signal by the interference, and multiplying by the processing gain. Signals from the other users are summed together and seen as interference. Signal-to-interference ratio for our analysis is thus: (5.14) where S is the received signal, Gp is processing gain, Iown is interference generated by those users that are connected to the same base station as the observed user, [other is in- terference from other cells, No is thermal noise and is an interference reduction factor due to the use of, e.g. Multi User Detection (MUD) in UL. However, MUD is NOT included in these simulations, therefore = 0. We calculate thermal noise for the 4.096 MHz band by assuming 5-dB system noise. Thermal noise power is thus equal to -103 dBm. In the multi-operator case, Other also includes the interference coming from the adjacent operator; which is decreased by ACIR dB. 5.5.4.3 Power Control Modelling of Traffic Channels in Downlink As in the UL case, downlink power control corresponds to the SIR based fast inner loop power control. Here too we assume perfect PC, i.e. during the power control loop, each DL traffic channel achieves perfectly the Eb/No target, assuming that the maximum TX power is not exceeded. Assuming perfect power control, we imply that PC error equals 0%, and PC delay equals 0 S. The UEs whose DL traffic channel is not able to achieve the Eb/No target at the end of a power control loop are considered also in outage as in the UL. We choose randomly the initial TX power for the PC loop of the DL traffic channel in the TX power range; however, the initial TX power should not affect the convergence process (PC loop) to the target Eb/No. 5.5.4.3.1 Reference S