Section: 4.4.5.1 IP Latency in DL, E-RAB level
Content: This measurement provides IP Latency in DL on E-RAB level. CC This measurement is obtained by the following formula for E-RABs LatTime is obtained by accumulating the time T for E-RABs The sample of “T” is made for the new arrived IP data block (PDCP SDU) when there is no other prior data to be transmitted to the same UE in the eNodeB/RN . LatSample is obtained by accumulating the number of Latency samples taken on the E-RAB level The measurement is split into subcounters per E-RAB QoS level (QCI). Each measurement is an integer value representing the time in ms. The number of measurements is equal to the number of QCIs. The measurement name has the form DRB.IpLateDl.QCI where QCI identifies the E-RAB level quality of service class. EUtranCellFDD EUtranCellTDD Valid for packet switched traffic EPS This measurement is to support the Integrity KPI “E-UTRAN IP Latency” defined in [13]