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TABLE 2. IMPORTANT PARAMETERS FOR NETWORK SIMULATIONSSimulation parameterNumber of frequenciesDownlink trafficAdjacent channel suppressionHandover hysteresisMax. AP/MT power (EIRP)Noise powerAntennas (omni)Uplink power control targetDownlink power control targetWall attenuation (office building)Floor attenuation (office building)Standard deviation of log-normal fadingValue8 and 1975%25 dB5dB23dBm-90 dBmOdBi- 55 dBm- 55 dBm3dB20 dB2dBTABLE 3. SYSTEM THROUGHPUT FOR19 AND 8 FREQUENCY REUSEExhibition hallPHY modes1-61-7OfficePHY modes1-61-7Reuse 1936 MbiVs54 Mbit/sReuse 1936 Mbit/s52 Mbit/sReuse 825 Mbit/s27 Mbit/sReuse 835 Mbit/s49 Mbit/scess point.' The link adaptation was modeledby updating the PHY mode every tenthMAC frame. The position of the receiver wasfixed during the update interval, and interfereswere placed randomly for each MACframe. In each update interval, the throughputfor all PHY modes was estimated (asshown in Figure 10), and the mode thatachieved the highest throughput was usedduring the next update interval. The mostimportant simulation parameters have beensummarized in Table 2.Figure 13 shows the downlink and uplinkC/I distribution for the office buildingwith 19 and 8 frequency reuse, whichcorrespond to• a single-operator; and• a two-operator scenario.Figure 14 shows the C/I distribution in theexhibition hall. These distributions formedthe basis of estimating system throughput.It is worth noting that C/I varies greatly betweenthe exhibition hall and the office environment.We estimated the throughput distributionwithin the network by mapping theFigure 13Downlink (DL) and uplink (UL) C/I distributionin the office building.118 Ericsson Review No. 2, 2000