n type 0 or 1 is used. Resource block assignment Depending on resource Indicates resource blocks to be allocation type assigned to the UE. Modulation and coding scheme Indicates modulation scheme and, together with the number of allocated physical resource blocks, the transport block size. HARQ process number 3 (TDD), 4 (FDD) Identifies the HARQ process to which the packet is associated. New data indicator Indicates whether the packet is a new transmission or a re-transmission. Redundancy version Identifies the redundancy version used for coding the packet. Transmit Power Control (TPC) Transmit power control command command for PUCCH for adapting the transmit power on the physical uplink control channel. Downlink assignment index Number of downlink subframes for (TDD only) uplink ACK/NACK bundling. 9.15 3GPP LTE physical layer protocols information enables the UE to identify the location and size of the resources in that subframe, as well as provide the UE with information on the modulation and coding scheme, and HARQ operation. As mentioned earlier, the information fields in the downlink scheduling grant are used to convey the information needed to demodulate the downlink shared channel. They include resource allocation information such as resource block size and duration of assignment, transmission format such as multi- antenna mode, modulation scheme, payload size, and HARQ operational parameters such as process number, redundancy version, and new data indicator. Similar information is also included in the uplink scheduling grants. There are 11 DCI formats specified as follows [108]: 1. Format 0: uplink allocation (scheduling of PUSCH); 2. Format 1: downlink allocation for one PDSCH codeword; 3. Format 1A: compact downlink allocation for one PDSCH codeword and random access procedure initiated by a PDCCH order; 4. Format 1B: compact downlink allocation for one PDSCH codeword with precoding information; 5. Format 1C: very compact downlink allocation for one PDSCH codeword and notifying MCCH change; 6. Format 1D