Reference signal design and association for physical downlink control channels

摘要

A method and apparatus for designing a Reference Signal (RS) used by a User Equipment (UE) to obtain respective channel estimates for demodulating respective Physical Downlink Control CHannels (PDCCHs), for determining at a UE a number of resource blocks to include for a reception of a Physical Downlink Shared CHannel (PDSCH), for determining at a UE a RS antenna port in order to enable spatial multiplexing of Enhanced PDCCH (EPDCCH) transmissions to different UEs, and for supporting Quadrature Amplitude Modulation 16 (QAM16) modulation, in addition to Quadrature Phase Shift Keying (QPSK) modulation, for EPDCCH transmissions without increasing a number of decoding operations at a UE are provided.

主权项

1. A method for receiving data in a user equipment (UE) from a base station in a mobile communication system, the method comprising:
receiving control information on an enhanced physical downlink control channel (EPDCCH) based on a demodulation reference signal (DM-RS) antenna port; and receiving the data based on the control information, wherein the DM-RS antenna port is determined based on information related to an enhanced control channel elements (ECCE) of the EPDCCH, a radio network temporary identity (RNTI) of the UE, and a number of ECCEs in the EPDCCH if a value of an aggregation level is larger than 1, and the DM-RS antenna port is determined based on the information related to the ECCE of the EPDCCH and the number of ECCEs in the EPDCCH with the exception of the RNTI of the UE if the value of the aggregation level is 1.