Section: 5.25 Transmission of Downlink Channel Quality Report
Content: The MAC entity of a BL UE or UE in enhanced coverage may be configured by upper layers to report DL channel quality in Msg3. DL channel quality in Msg3 in RRC_CONNECTED is not reported. If the UE is a BL UE or UE in enhanced coverage or an NB-IoT UE, a Downlink Channel Quality Report (DCQR) shall be triggered if any of the following events occur: - DCQR Command MAC control element is received, in which case the DCQR is referred below to as "Regular DCQR"; - for BL UE or UE in enhanced coverage, transmission of DCQR in Msg3 is configured by upper layers in mpdcch-CQI-Reporting, in which case DCQR is referred below to as "Msg3 DCQR". If any type of DCQR has been triggered: - start performing DL channel quality measurements according to TS 36.133[ Evolved Universal Terrestrial Radio Access (E-UTRA); Requirements for support of radio resource management ]  [9]. If "Regular DCQR" has been triggered: - if an uplink grant has been received on the PDCCH for MAC entity's C-RNTI: - instruct the Multiplexing and Assembly procedure to generate a DCQR and AS RAI MAC control element as defined in clause 6.1.3.19; - cancel the triggered "Regular DCQR". If "Msg3 DCQR" has been triggered: - if an uplink grant has been received on the PDCCH for MAC entity's RA-RNTI: - if the allocated resources can accommodate a DCQR and AS RAI MAC control element plus its subheader as a result of logical channel prioritization: - instruct the Multiplexing and Assembly procedure to generate a DCQR and AS RAI MAC control element as defined in clause 6.1.3.19; - else if the uplink grant is not for EDT: - if configured by upper layers in mpdcch-CQI-Reporting, use R and F2 fields in the MAC PDU subheader, to transmit the measurement outcome, as defined in clause 6.2.1; - cancel the triggered "Msg3 DCQR".