Section: 6.3 UE power headroom related measurements
Content: a) This measurement provides a bin distribution (histogram) of the periodical E-UTRAN UE power headroom measurements received from all of UEs in the measured E-UTRAN cell. To collect this measurement, the eNodeB needs to trigger the periodical UE measurement reports towards all of the UEs in the measured E-UTRAN cell. b) CC c) Receipt by the eNodeB from the UE of Power Headroom Report message indicating a periodical UE measurement POWER_HEADROOM report. This measurement shall be increased for each reported value POWER_HEADROOM (See in 3GPP TS 36.321[ Evolved Universal Terrestrial Radio Access (E-UTRA); Medium Access Control (MAC) protocol specification ]  [16]). For every one POWER_HEADROOM (s) a separate measurement is defined. (See in 3GPP TS 36.133[ Evolved Universal Terrestrial Radio Access (E-UTRA); Requirements for support of radio resource management ]  [19]). d) Each measurement is an integer value. e) MR.PowerHeadRoom.y . y is an integer from 00 to 63. Note: 00 of y indicates POWER_HEADROOM_00, namely -23 PH -22, 01 of y indicates POWER_HEADROOM_01, namely -22 PH -21, … 63 of y indicates POWER_HEADROOM_63, namely PH≥40. (See in 3GPP TS36.133[ Evolved Universal Terrestrial Radio Access (E-UTRA); Requirements for support of radio resource management ]  [19]) f) EUtranCellTDD EUtranCellFDD g) Valid for packet switched traffic. h) EPS