Methods for transmitting and receiving control channel, base station, and user equipment

A base station, comprising a transmitter, a receiver, and a processor which is communicatively connected with the transmitter and the receiver, wherein

• the processor is configured to:
• obtain a resource set and REs of predetermined overheads in the resource set, wherein the REs of the predetermined overheads comprise a RE of a channel state information-reference signal (CSI-RS), a RE of a cell-specific reference signal (CRS), a RE of a demodulation reference signal (DMRS), and a RE of a muted RE, and a RE of at least one of a paging channel and a synchronization channel;
• and
• map an extended physical downlink control channel (E-PDCCH) to REs comprised in an extended control channel element (E-CCE), wherein the E-CCE carries the E-PDCCH, the REs comprised in the E-CCE are a part of the REs comprised in the resource set and do not contain the RE of the CSI-RS, the RE of the CRS, the RE of the DMRS, the muted RE, and the RE of the at least one of the paging channel and the synchronization channel, the E-CCE is one of a first type E-CCE or a second type E-CCE, wherein the first type E-CCE is mapped in a discrete resource mapping manner, and the second type E-CCE is mapped in a centralized resource mapping manner;
• and
• the transmitter is configured to:
• transmit the E-PDCCH to a terminal device.

A terminal device, comprising:

• a processor coupled with a receiver, wherein
• the processor is configured to determine a resource set and resource elements (REs) of predetermined overheads in the resource set, wherein the REs of the predetermined overheads comprise a RE of a channel state information-reference signal (CSI-RS), a RE of a cell-specific reference signal (CRS), a RE of a demodulation reference signal (DMRS), and a RE of a muted RE, and a RE of at least one of a paging channel and a synchronization channel;
• and
• the receiver is configured to receive, from a base station, an extended physical downlink control channel (E-PDCCH) on REs comprised in an extended control channel element (E-CCE), wherein the E-CCE carries the E-PDCCH, the REs comprised in the E-CCE are a part of the REs comprised in the resource set and do not contain the RE of the CSI-RS, the RE of the CRS, the RE of the DMRS, the muted RE, and the RE of the at least one of the paging channel and the synchronization channel, and the E-CCE is one of a first type E-CCE or a second type E-CCE, wherein the first type E-CCE is mapped in a discrete resource mapping manner, and the second type E-CCE is mapped in a centralized resource mapping manner.