Method and apparatus for determining TDD UL-DL configuration applicable for radio frames
First Claim
Patent Images
1. A method for monitoring a physical downlink control channel (PDCCH) by a user equipment (UE) in a wireless communication system, the method comprising:
- receiving, by the UE, a system information block (SIB) from a base station;
identifying, by the UE, downlink (DL) subframes indicated by a time division duplex (TDD) uplink (UL)/DL configuration in the SIB;
monitoring, by the UE, the PDCCH transmitted from the base station on at least one DL subframe included in an active time of a discontinuous reception (DRX) cycle among the DL subframes;
obtaining, by the UE, information about at least one TDD UL/DL configuration from the monitored PDCCH; and
applying, by the UE, the at least one TDD UL/DL configuration to at least one frame including the at least one DL subframe based on the obtained information,wherein the active time represents a duration corresponding to a predetermined number of subframes from a subframe where the DRX cycle starts, and the active time is repeated periodically.
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Abstract
A method and an apparatus are provided for determining a configuration for a radio frame. A transition from a period of inactivity to a period of activity is detected in a configured discontinuous reception (DRX) cycle. A category of at least one subframe of the radio frame that is likely to be encountered during the period of activity is determined, if a dynamic reconfiguration of time division duplex (TDD) uplink (UL)—downlink (DL) configurations is enabled. The category of the least one subframe includes one of a flexible subframe and a fixed subframe.
18 Citations
12 Claims
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1. A method for monitoring a physical downlink control channel (PDCCH) by a user equipment (UE) in a wireless communication system, the method comprising:
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receiving, by the UE, a system information block (SIB) from a base station; identifying, by the UE, downlink (DL) subframes indicated by a time division duplex (TDD) uplink (UL)/DL configuration in the SIB; monitoring, by the UE, the PDCCH transmitted from the base station on at least one DL subframe included in an active time of a discontinuous reception (DRX) cycle among the DL subframes; obtaining, by the UE, information about at least one TDD UL/DL configuration from the monitored PDCCH; and applying, by the UE, the at least one TDD UL/DL configuration to at least one frame including the at least one DL subframe based on the obtained information, wherein the active time represents a duration corresponding to a predetermined number of subframes from a subframe where the DRX cycle starts, and the active time is repeated periodically. - View Dependent Claims (2, 3)
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4. A method for transmitting information of monitoring a physical downlink control channel (PDCCH) by a base station (BS) in a wireless communication system, the method comprising:
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transmitting, by the BS, to a user equipment (UE), a system information block (SIB) including a time division duplex (TDD) uplink (UL)/downlink (DL) configuration; and transmitting, by the BS, to the UE, information about at least one TDD UL/DL configuration through the PDCCH on at least one subframe, wherein the at least one subframe is included in an active time of a discontinuous reception (DRX) cycle and is at least one DL subframe indicated by the TDD UL/DL configuration, wherein the at least one TDD UL/DL configuration is applied to at least one frame including the at least one DL subframe based on the information, and wherein the active time represents a duration corresponding to a predetermined number of subframes from a subframe where the DRX cycle starts, and the active time is repeated periodically. - View Dependent Claims (5, 6)
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7. A user equipment (UE) in a wireless communication system, the UE comprising:
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a transceiver configured to receive a system information block (SIB) from a base station; and a processor configured to; identity downlink (DL) subframes indicated by a time division duplex (TDD) unlink (UL)/DL configuration in the SIB, monitor a physical downlink control channel (PDCCH) transmitted from the base station on at least one DL subframe included in an active time of a discontinuous reception (DRX) cycle among the DL subframes, obtain information about at least one TDD UL/DL configuration from the monitored PDCCH, and apply the at least one TDD UL/DL configuration to at least one frame including the at least one DL subframe based on the obtained information, wherein the active time represents a duration corresponding to a predetermined number of subframes from a subframe where the DRX cycle starts, and the active time is repeated periodically. - View Dependent Claims (8, 9)
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10. A base station (BS) in a wireless communication system, the BS comprising:
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a transceiver; and a processor configured to control the transceiver to; transmit, to a user equipment (UE), a system information block (SIB) including, a time division duplex (TDD) uplink (UL)/downlink (DL) configuration; and transmit, to the UE, information about at least one TDD UL/DL configuration through a physical downlink control channel (PDCCH) on at least one subframe, wherein the at least one subframe is included in an active time of a discontinuous reception (DRX) cycle and is at least one DL subframe indicated by the T[DD UL/DL configuration, wherein the at least one TDD UL/DL configuration is applied to at least one frame including the at least one DL subframe based on the information, and wherein the active time represents a duration corresponding to a predetermined number of subframes from a subframe where the DRX cycle starts, and the active time is repeated periodically. - View Dependent Claims (11, 12)
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Specification