d HSUPA inband signaling traffic, PCR = 4 Mbps, MDCR = 0.4 Mbps 1 UBR+ VP for HSUPA and HSDPA inband signaling traffic, PCR = 4 Mbps, MDCR = 0.4 Mbps Table A.7: Simulation Scenarios All simulation scenarios run for 1000 seconds. Following the main parameter configurations for the simulations are given: Radio configuration TTI = 2 ms HSDPA, 10 ms HSUPA Noise Rise = 6dB (for HSUPA) Others-to-own interference factor = 0.6 (for HSUPA) Number of HARQ processes per user flow: 4 RLC protocol: Operate in RLC AM mode TCP protocol: TCP New Reno version Performance Analysis In the following the comparison results are presented. Special attentions are paid to two main different performance aspects: transport network performance and the end user performance. In the transport network, the network-specific QoS measures such as packet transport delay and packet losses need to be controlled to meet the agreed quality of a network, which is targeted to low delay and low loss. On the other hand, the end user performances like application throughput also need to be guaranteed to satisfy the user's A.16 Use of Traffic Separation for Transport of HSPA and Rel99 particular QoS requirements. In the following presented results, the total discarded ATM cells and the link throughput represent the transport network performance. The user application throughput and the experienced TCP retransmissions indicate the end user performances. Figure A.25 shows the total discarded ATM cells on the downlink (left diagram) and the uplink (right diagram) individually. The ATM cell discard is due to the ATM buffer overflow, which is caused by the link overload. In Figure A.25 the ATM cell discards only happen to HSDPA traffic on the downlink and HSUPA traffic on the uplink. The main reason of cell losses of HSPA traffic is because that with both 2 and 3 VPs configurations, the HSPA traffic is assigned to cheap UBR+ VP. In the heavy loaded situations, the intermediate ATM switches may drop HSPA cells if the MDCR rate has been exceeded by the amount of the