Section: 4.2.2.3 Number of E-RABs attempted to release
Content: a) This measurement provides the number of E-RABs attempted to release. The measurement is split into subcounters per E-RAB QoS level (QCI). b) CC c) On receipt by the eNodeB/RN of an E-RAB RELEASE COMMAND or UE CONTEXT RELEASE COMMAND or RESET message from MME/DeNB; or receipt by the eNodeB/RN of an UE CONTEXT RELEASE message from another eNodeB/DeNB or transmission by the eNodeB/RN of a an E-RAB Release Indication or RESET message to MME/DeNB; or on receipt by the eNB/RN of a PATH SWITCH REQUEST ACKNOWLEDGE or PATH SWITCH REQUEST FAILED message by which some or all E-RABs in the corresponding PATH SWITCH REQUEST need to be released; or on receipt by the eNB/RN of a RRCConnectionReconfigurationComplete message from the UE, indicating a successful intra-eNB/RN handover (see TS 36.331[ Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification ]  [8]), i.e., the E-RABs in the cooresponding RRCConnectionReconfiguration message can be be released by the source EUtran cell. Each corresponding E-RAB to release is added to the relevant measurement per QCI, the possible QCIs are included in TS 36.413[ Evolved Universal Terrestrial Radio Access Network (E-UTRAN); S1 Application Protocol (S1AP) ]  [9]. , the same E-RAB shall not be counted repeatly but only one in case it appears more than one time in the same or different messages triggering this measurement The sum of all supported per QCI measurements shall equal the total number of E-RABs attempted to release. In case only a subset of per QCI measurements is supported, a sum subcounter will be provided first. d) Each measurement is an integer value. The number of measurements is equal to the number of QCIs plus a possible sum value identified by the .sum suffix. e) The measurement name has the form ERAB.RelAttNbr.QCI where QCI identifies the E-RAB level quality of service class. f) EUtranCellFDD EUtranCellTDD g) Valid for packet switched traffic h) EPS i) One usage of this measurement is to support the coverage ratio (CR) calculation for EE coverage area determination in [21].