LTE MAC SCHEDULER

LTE Air Interface Frame Structure

LTE Air Interface

LTE Air Interface Resource Block

LTE Protocol stack

LTE MAC and PHY Channels

Channel Mapping

LTE MAC and PHY Channels

• eNodeB MAC scheduler resource assignments(RB’s) to UE’s in both Uplink and Downlink.

• Resource assignments intimated via PDCCH

MAC Resource Assignment

General Model of Packet Scheduler

Uplink and downlink control information

Uplink and downlink control channels

Physical layer signals

Downlink channel map

Uplink channel map

CQI Modulation scheme Coding rate (units of 1/1 024) Information bits per symbol0 n/a 0 0.001 QPSK 78 0.152 QPSK 120 0.233 QPSK 193 0.384 QPSK 308 0.605 QPSK 449 0.886 QPSK 602 1.187 16-QAM 378 1.488 16-QAM 490 1.919 16-QAM 616 2.4110 64-QAM 466 2.7311 64-QAM 567 3.3212 64-QAM 666 3.9013 64-QAM 772 4.5214 64-QAM 873 5.1215 64-QAM 948 5.55