Headroom Report) on PUCCH (or starts random access if no PUCCH is configured).
• Scheduler at E-NodeB dynamically allocates UL resources to UE:
– Grant is assigned to UE on PDCCH.
– Assigned resources (PRB and MCS) are communicated to the UE.
• UE sends user data on PUSCH.
• If E-Node B decodes the Uplink data successfully, it changes the New Data Indicator (NDI) on PDCCH, and/or
PUCCH Physical Uplink Control Channel sends ACK/NAKs on PHICH.
PDCCH Physical Downlink Control Channel
PUSCH Physical Uplink Shared Channel
PHICH Physical HARQ ACK/NAK Indicator Channel
E-UTRA Uplink Scheduled Operation
The following information is transmitted by means of the Downlink Control Information (DCI) format 0 on PDCCH
for the scheduling of PUSCH:
Flag for format0/format1A differentiation
Hopping flag
Resource block assignment and hopping resource allocation
Modulation and coding scheme and redundancy version
New Data Indicator (NDI)
TPC command for scheduled PUSCH
Cyclic shift for DM RS
CQI request – 1 bit
The details about grant value and its relationship to PUSCH power can be found in TS36.213 § 5.1.1.1.
The UE ACK-NAK procedure is described in TS36.213 § 8.3.
New Data Indicator (NDI) can be found in the Downlink Control Information (DCI) format 0 on PDCCH together with
the Uplink scheduling assignment.
HARQ ACK/NAKs are sent on the Downlink PHICH. Retransmissions shall be needed if the NDI has not changed or
if PDCCH is not detected.
Uplink Scheduling at E-Node B is based on:
Serving Cell Uplink Noise Rise (Rise-over-Thermal)
Overload Indicators from other E-Node Bs
UE Scheduling Requests (SR)
UE Buffer Status (BSR)
UE Power Headroom Report (PHR)
UE Capabilities