Section: 4.4.4.1 DL PDCP SDU air interface loss rate
Content: This measurement provides the fraction of IP packets (PDCP SDUs) which are lost (not successfully transmitted) on the downlink air interface. Only user-plane traffic (DTCH) is considered. A lost packet is one whose context is removed from the eNodeB/RN after an attempt has been made to transmit part or all of the packet on the air interface but the whole packet has not been successfully transmitted. The measurement is split into subcounters per E-RAB QoS level (QCI). The packets transmitted between the eNodeB (or RN) and UEs and the packets transmitted between E-UTRAN and RN are counted seperately. The measurement is also applicable to RNs. SI This measurement is obtained according to the definition in 3GPP TS 36.314[ Evolved Universal Terrestrial Radio Access  (E-UTRA); Layer 2 - Measurements ]  [11]. Separate counters are maintained for each QCI. In case only a subset of per QCI measurements is supported, a loss rate subcounter calculated across all QCIs will be provided first. Each measurement is an integer value representing the air interface loss rate multiplied by 1E6. The number of measurements is equal to the number of QCIs plus a possible sum value identified by the .sum suffix. The measurement name has the form DRB. PdcpSduAirLossRateDl.QCI, which indicates the DL PDCP SDU air interface loss rate between the eNodeB (or RN) and UE DRB. PdcpSduAirLossRateDlRN.QCI, which indicates the DL PDCP SDU air interface loss rate between the E-UTRAN and RN. where QCI identifies the target E-RAB level quality of service class. EUtranCellFDD EUtranCellTDD Valid for packet switched traffic EPS