i-persistent PS is able to have 50-100% higher capacities than fully dynamic PS. As the performance of Table 10.10 VolP Capacity in LTE VolP Codec AMR 7.95 AMR 12.2 Downlink Capacity Dynamic scheduler, without bundling Dynamic scheduler, with bundling Semi-persistent scheduler Uplink Capacity Dynamic scheduler Semi-persistent scheduler © 2009 by Taylor & Francis Group, LLC Long Term Evolution: 3GPP LTE Radio and Cellular Technology semi-persistent PS suffers from data limitation, gains in capacity over fully dynamic PS are smaller for the AMR 12.2, which has a higher data rate and hence a big- ger VoIP packet size. When packet bundling is used with AMR 12.2, the control channel limitation for the performance of fully dynamic PS is not that significant compared to the corresponding case with AMR 7.95, due to a lower number of sup- ported users at 5% outage. Therefore, fully dynamic PS is able to have 15% gains in capacity over semi-persistent PS if AMR 12.2 is used with packet bundling. When bundling is used with AMR 7.95, control channel limitation again starts to domi- nate the performance of fully dynamic PS due to the high number of supported users at 5% outage, and hence semi-persistent PS achieves 8% higher capacities than fully dynamic PS. However, in practice it will be most likely necessary to use wideband CQI with VoIP traffic to keep the CQI related UL signaling load reason- able. This will reduce the performance of the dynamic PS more than that of the semi-persistent PS (as the dynamic PS relies more on the frequency selective CQI information). Therefore, the semi-persistent PS can be seen as an attractive option for supporting a high number of simultaneous VoIP users. When analyzing VoIP results for LTE UL, it is emphasized that similar to DL, the semi-persistent scheduling suffers much less from control channel limitations, whereas the performance of dynamic scheduling greatly relies on the number of control chan- nels per TTI, as illustrated in Figure 10.19, which contains the cumulative distributio