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US 11,057,914 B2Granted
Downlink control information receiving method and user equipment, and downlink control information transmission method and base station
AssigneeLG Electronics Inc.
InventorsHyangsun You, Yunjung Yi, Eunsun Kim, Suckchel Yang
Life of this patent
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Abstract
A method and an apparatus for transmitting/receiving downlink control information are provided. Downlink control information about a data channel may be transmitted through one of a plurality of decoding candidates. Depending on whether the data channel is based on a first sub-frame or a second sub-frame, the downlink control information is transmitted through one of the candidates for the first sub-frame or one of the candidates for the second sub-frame, from among the plurality of decoding candidates. The second sub-frame is shorter than the first sub-frame and can be set within the first sub-frame.
Claims20
A method for receiving downlink control information (DCI) by a user equipment (UE), the method comprising:
- receiving a radio resource control (RRC) signal;
- and
- monitoring N decoding candidates in a common search space configured for a first DCI based on the RRC signal, where N is an integer larger than 1,
- wherein the common search space is one of multiple search spaces in a control region for a transmission time interval (TTI),
- wherein the TTI includes 14 orthogonal frequency division multiplexing (OFDM) symbols in a time domain,
- wherein the common search space is at an aggregation level L, and consists of the N decoding candidates for the aggregation level L,
- wherein each of the N decoding candidates consists of L control channel elements (CCEs),
- wherein the monitoring the N decoding candidates in the common search space comprises:
- monitoring first M decoding candidates, among the N decoding candidates in the common search space, to detect a second DCI different from the first DCI, where M is a positive integer smaller than N,
- wherein only the first M decoding candidates, among the N decoding candidates in the common search space, are available for the second DCI in the common search space, and remaining N-M decoding candidates, among the N decoding candidates in the common search space, are not available for the second DCI in the common search space where M is a positive integer smaller than N-M, and
- wherein the RRC signal includes information regarding the first M decoding candidates available for the second DCI.
8 more elements
A user equipment (UE) for receiving downlink control information (DCI), the UE comprising:
- a receiver;
- and
- a processor connected to the receiver, and configured to:
- control the receiver to receive a radio resource control (RRC) signal, and
- monitor N decoding candidates in a common search space configured for a first DCI based on the RRC signal, where N is an integer larger than 1,
- wherein the common search space is one of multiple search spaces in a control region for a transmission time interval (TTI),
- wherein the TTI includes 14 orthogonal frequency division multiplexing (OFDM) symbols in a time domain,
- wherein the common search space is at an aggregation level L, and consists of the N decoding candidates for the aggregation level L,
- wherein each of the N decoding candidates consists of L control channel elements (CCEs),
- wherein the processor is configured to monitor first M decoding candidates, among the N decoding candidates in the common search space, to detect a second DCI different from the first DCI, where M is a positive integer smaller than N,
- wherein only the first M decoding candidates, among the N decoding candidates in the common search space, are available for the second DCI in the common search space, and remaining N-M decoding candidates, among the N decoding candidates in the common search space, are not available for the second DCI in the common search space where M is a positive integer smaller than N-M, and
- wherein the RRC signal includes information regarding the first M decoding candidates.
9 more elements
A method for transmitting downlink control information (DCI) by a base station (BS), the method comprising:
- transmitting a radio resource control (RRC) signal;
- and
- transmitting at least a second DCI in a common search space configured for a first DCI different from the second DCI, based on the RRC signal,
- wherein the common search space is one of multiple search spaces in a control region for a transmission time interval (TTI),
- wherein the TTI includes 14 orthogonal frequency division multiplexing (OFDM) symbols in a time domain,
- wherein the common search space is at an aggregation level L, and consists of N decoding candidates for the aggregation level L, where N is an integer larger than 1,
- wherein each of the N decoding candidates consists of L control channel elements (CCEs),
- wherein the transmitting the second DCI in the common search space comprises:
- transmitting the second DCI in one of first M decoding candidates, among the N decoding candidates in the common search space,
- wherein only the first M decoding candidates, among the N decoding candidates in the common search space, are available for the second DCI in the common search space, and remaining N-M decoding candidates, among the N decoding candidates in the common search space, are not available for the second DCI in the common search space where M is a positive integer smaller than N-M, and
- wherein the RRC signal includes information regarding the first M decoding candidates available for the second DCI.
8 more elements
A base station (BS) for transmitting downlink control information (DCI), the BS comprising:
- a transmitter;
- and
- a processor connected to the transmitter, and configured to:
- control the transmitter to transmit at least a second DCI in a common search space configured for a first DCI different from the second DCI, based on the RRC signal,
- wherein the common search space is one of multiple search spaces in a control region for a transmission time interval (TTI),
- wherein the TTI includes 14 orthogonal frequency division multiplexing (OFDM) symbols in a time domain,
- wherein the common search space is at an aggregation level L, and consists of N decoding candidates for the aggregation level L, where N is an integer larger than 1,
- wherein each of the N decoding candidates consists of L control channel elements (CCEs),
- wherein the processor is configured to control the transmitter to transmit the second DCI in one of first M decoding candidates, among the N decoding candidates in the common search space,
- wherein only the first M decoding candidates, among the N decoding candidates in the common search space, are available for the second DCI in the common search space, and remaining N-M decoding candidates, among the N decoding candidates in the common search space, are not available for the second DCI in the common search space where M is a positive integer smaller than N-M, and
- wherein the RRC signal includes information regarding the first M decoding candidates available for the second DCI.
8 more elements
Dependencies are inferred from the claim text.