Rel-17 evaluation methodology for XR power saving and capacity enhancements (see TR 38.838) is used as the baseline evaluation methodology for UE power saving and capacity evaluation of Rel-18 XR. System capacity is identified as KPI for capacity study, which is defined as the maximum number of users per cell with at least Y % of UEs being satisfied. A UE is declared as a satisfied UE if all considered streams meet their own packet error rate (PER) and PDB requirements, i.e., more than X% of packets are successfully transmitted within a given air interface PDB. From Rel-17 XR evaluation methodology, baseline parameters are Y= 90% and X = 99%. For power saving evaluation, power saving gain and capacity gain are calculated with respect to the AlwaysOn baseline unless otherwise noted. Jitter in DL is assumed on unless otherwise noted. In addition to the values for jitter in DL in Table 5.1-2 in TR 38.838, the following statistical parameters can also be optionally evaluated in Rel-18 XR SI.