Section: 4.2.1.7 Mean E-RAB Setup time
Content: a) This measurement provides the mean time per QCI it takes to establish an E-RAB. b) DER (n=1) c) This measurement is obtained by accumulating the time intervals for every successfully established E-RAB between the receipt of an E-RAB SETUP REQUEST or INITIAL CONTEXT SETUP REQUEST message and the transmission of the corresponding E-RAB SETUP RESPONSE or INITIAL CONTEXT SETUP RESPONSE message by the eNodeB over the granularity period. The end value of this time will then be divided by the number of successfully established E-RABs in the granularity period to give the arithmetic mean. The accumulator shall be reinitialised at the beginning of each granularity period. The measurement is split into subcounters per QCI, and the possible QCIs are included in TS 36.413[ Evolved Universal Terrestrial Radio Access Network (E-UTRAN); S1 Application Protocol (S1AP) ]  [9]. d) Each measurement is an integer value (in milliseconds). e) The measurement name has the form ERAB.EstabTimeMean.QCI where QCI identifies the E-RAB level quality of service class. f) EUtranCellFDD EUtranCellTDD g) Valid for packet switching. h) EPS