A method and apparatus for transmitting and receiving a signal in a wireless communication system, according to an embodiment of the present invention, comprise: iteratively mapping a PUCCH sequence to each of resource blocks (RBs) within an interlace; and transmitting a PUCCH on the interlace, wherein a phase shift (PS) value of the PUCCH sequence may be changed on the basis of an RB index of each of the RBs.

New sequences have been proposed and/or adopted for short Physical Uplink Control Channel communications between base stations and UEs. In an exemplary embodiment, a UE communicates with a base station based on sequence groups that include the new sequences, where the new sequences are allocated to different sequence groups based, at least in part, on correlations with other existing sequences included in individual sequence groups.

New sequences have been proposed and/or adopted for short Physical Uplink Control Channel communications between base stations and UEs. In an exemplary embodiment, a UE communicates with a base station based on sequence groups that include the new sequences, where the new sequences are allocated to different sequence groups based, at least in part, on correlations with other existing sequences included in individual sequence groups.

Methods, apparatuses, and systems described herein generally relate to a reference signal generation and mapping. For example, a method comprises determining a first set of antenna ports for a demodulation reference signal (DM-RS) transmission; determining, based on the first set, a frequency index associated with four adjacent resource elements, wherein the four adjacent resource elements correspond to two adjacent symbols in a time axis and to two adjacent subcarriers in a frequency axis; generating, based on a first orthogonal cover code and a second orthogonal cover code, a DM-RS associated with the first set of antenna ports; and transmitting, via a mapping to the four adjacent resource elements, the DM-RS associated with the first set of antenna ports.

New sequences have been proposed and/or adopted for short Physical Uplink Control Channel communications between base stations and UEs. In an exemplary embodiment, a UE communicates with a base station based on sequence groups that include the new sequences, where the new sequences are allocated to different sequence groups based, at least in part, on correlations with other existing sequences included in individual sequence groups.

The present invention discloses a data transmission method and apparatus, and a user equipment. The method includes: classifying, by using a transmission time interval TTI as a classification basis, TTIs on a carrier in a cell into a time division multiplexing TDM TTI and a code division multiplexing CDM TTI; and sending, to a user equipment UE, control information carrying a classified result, so as to instruct the UE to send uplink data according to the classified result and a data scheduling type of the UE in the TDM TTI or the CDM. By using the foregoing technical solution, a data transmission resource can be well saved and scheduling flexibility can be improved.

The present invention discloses a data transmission method and apparatus, and a user equipment. The method includes: classifying, by using a transmission time interval TTI as a classification basis, TTIs on a carrier in a cell into a time division multiplexing TDM TTI and a code division multiplexing CDM TTI; and sending, to a user equipment UE, control information carrying a classified result, so as to instruct the UE to send uplink data according to the classified result and a data scheduling type of the UE in the TDM TTI or the CDM. By using the foregoing technical solution, a data transmission resource can be well saved and scheduling flexibility can be improved.

The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and apparatus for receiving control information through an enhanced physical downlink control channel (EPDCCH), the method includes receiving a subframe which includes one or more EPDCCH physical resource block (PRB) sets, and attempting to decode one or more EPDCCH candidates in each of the EPDCCH PRB sets. When the transmission areas of the EPDCCH PRB set and a first signal overlap with each other, information relating to the EPDCCH candidate or information relating to the decoding is determined to be different according to one or both of EPDCCH PRB set type and/or cell identity (ID).

The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and apparatus for receiving control information through an enhanced physical downlink control channel (EPDCCH), the method includes receiving a subframe which includes one or more EPDCCH physical resource block (PRB) sets, and attempting to decode one or more EPDCCH candidates in each of the EPDCCH PRB sets. When the transmission areas of the EPDCCH PRB set and a first signal overlap with each other, information relating to the EPDCCH candidate or information relating to the decoding is determined to be different according to one or both of EPDCCH PRB set type and/or cell identity (ID).

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of a set of channel state information reference signal (CSI-RS) port mappings for different antenna adaptation levels of a base station. The UE may receive, from the base station, a CSI-RS in accordance with a first CSI-RS port mapping, from the set of CSI-RS port mappings, for a first antenna adaptation level of the different antenna adaptation levels. Numerous other aspects are described.