Patent ID: 9510335
Filing Date: 2016-11-29
CPC Classification: H04L,H04W

Claim Text:
1. A method for transmitting control information by a base station for scheduling uplink data transmission, the method comprising: attaching cyclic redundancy check (CRC) parity bits to a physical downlink control channel (PDCCH) containing a first downlink control information (DCI) for scheduling uplink data transmission on a single antenna, the first DCI including a 1-bit first field indicating whether frequency hopping is scheduled, a N-bit second field indicating uplink resource blocks allocated according to one of a plurality of resource allocation types, and a third field indicating an aperiodic sounding reference signal (SRS) transmission, wherein, when the uplink resource blocks are allocated according to a non-contiguous resource allocation, both of the 1-bit first field and the N-bit second field are used for indicating the uplink resource blocks; scrambling the CRC parity bits attached to the PDCCH with a bit sequence which indicates the single antenna to be used for the uplink data transmission among multiple antennas of a user equipment; transmitting the PDCCH payload in which the scrambled CRC parity bits is attached; and transmitting second DCI for scheduling multi-antenna PUSCH (physical uplink shared channel) transmission, wherein the second DCI includes a fourth field explicitly indicating a precoding weight to be used for PUSCH precoding, and wherein a 2-Tx antenna codebook for the PUSCH precoding includes a first precoding weight and a second precoding weight