Method and apparatus for determining TDD UL-DL configuration applicable for radio frames

A method for transmitting information for monitoring a physical downlink control channel (PDCCH) by a base station (BS) in a wireless communication system, the method comprising:

• transmitting, by the BS, to a user equipment (UE), a system information block (SIB) including a first time division duplex (TDD) uplink (UL)/downlink (DL) configuration;
• and
• transmitting, by the BS, to the UE, information about a second TDD UL/DL configuration to be applied to one or more radio frames through the PDCCH on a DL subframe, the DL subframe being one of DL subframes indicated by the first TDD UL/DL configuration,
• wherein the DL subframe corresponds to a predetermined subframe number,
• wherein the DL subframe is included in an on duration period of a discontinuous reception (DRX) cycle, and
• wherein the on duration period represents a period corresponding to a predetermined number of subframes from a subframe where the DRX cycle starts, and the on duration period is repeated periodically.

A user equipment (UE) in a wireless communication system, the UE comprising:

• a transceiver configured to receive a system information block (SIB) from a base station;
• and
• at least one processor configured to:
• obtain a first time division duplex (TDD) uplink (UL)/downlink (DL) configuration from the SIB;
• identify DL subframes indicated by the obtained first TDD UL/DL configuration;
• monitor a physical downlink control channel (PDCCH) transmitted from the base station on a DL subframe included in an on duration period of a discontinuous reception (DRX) cycle among the DL subframes;
• obtain information about a second TDD UL/DL configuration from the monitored PDCCH;
• and
• apply the second TDD UL/DL configuration to one or more radio frames based on the obtained information,
• wherein the DL subframe corresponds to a predetermined subframe number, and
• wherein the on duration period represents a period corresponding to a predetermined number of subframes from a subframe where the DRX cycle starts, and the on duration period is repeated periodically.

A base station (BS) in a wireless communication system, the BS comprising:

• a transceiver;
• and
• at least one processor configured to control the transceiver to:
• transmit, to a user equipment (UE), a system information block (SIB) including a first time division duplex (TDD) uplink (UL)/downlink (DL) configuration;
• and
• transmit, to the UE, information about a second TDD UL/DL configuration to be applied to one or more radio frames through a physical downlink control channel (PDCCH) on a DL subframe, the DL subframe being one of DL subframes indicated by the first TDD UL/DL configuration,
• wherein the DL subframe corresponds to a predetermined subframe number,
• wherein the DL subframe is included in an on duration period of a discontinuous reception (DRX) cycle, and
• wherein the on duration period represents a period corresponding to a predetermined number of subframes from a subframe where the DRX cycle starts, and the on duration period is repeated periodically.