Abstract
The present invention relates to a wireless access system supporting multi-carrier aggregation (CA) and discloses various methods and devices for aperiodic feedback of channel state information (CSI). The method for aperiodic feedback of the channel state information (CSI) in the wireless access system supporting the multi-carrier aggregation (CA) according to an embodiment of the present invention comprises the steps of: receiving a first message including an aperiodic CSI request field and uplink grant from a base station; receiving a second message including bitmap information indicating a downlink component carrier (DL CC) subjected to CSI measurement from the base station; measuring the CSI in consideration of at least one of the aperiodic CSI request uplink grant and bitmap information; and transmitting the measured CSI to the base station through a physical uplink shared channel (PUSCH) to thereby receive aperiodic feedback of the same.
Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
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Declaration Date | Declaration Reference | Declaring Company | Specification Number | ||||||
4G | 02/10/2014 | ISLD-201409-053 | LG |
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4G | 01/12/2016 | ISLD-201611-011 | LG | Yes | Family Member | ||||
4G | 01/03/2017 | ISLD-201702-022 | LG |
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4G | 14/11/2017 | ISLD-201805-021 | LG | No | Family Member | ||||
5G | 20/10/2018 | ISLD-201810-050 | LG |
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Specification Information
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All Pending Patents In Patent Family : | ---- |
Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
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EP2600547A1 | 4G | 02/10/2014 | ISLD-201409-053 | LG |
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EP2600547A1 | 4G | 01/12/2016 | ISLD-201611-011 | LG | Yes | Family Member | ||||
EP2600547A1 | 4G | 01/03/2017 | ISLD-201702-022 | LG |
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EP2600547A1 | 5G | 20/10/2018 | ISLD-201810-050 | LG |
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EP2600547A4 | 4G | 01/12/2016 | ISLD-201611-011 | LG | Yes | Family Member | ||||
EP2600547A4 | 4G | 01/03/2017 | ISLD-201702-022 | LG |
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EP2600547A4 | 5G | 20/10/2018 | ISLD-201810-050 | LG |
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Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Channel Status Information(CSI) Reporting
Product
User Equipment (UE/Terminal)
Use Cases
Services
Claim
1. A method for aperiodic feedback of channel state information (CSI) in a wireless access system supporting multicarrier aggregation, the method comprising:
receiving, by a user equipment (UE) from a (BS), a physical downlink control channel (PDCCH) signal including a CSI request field, the CSI request field indicating an aperiodic CSI feedback is triggered for two or more cells;
receiving, by the UE from the BS, a radio resource control (RRC) signal indicating the two or more cells for which the aperiodic CSI feedback is triggered; and
transmitting, by the UE to the BS, a physical uplink shared channel (PUSCH) signal including the aperiodic CSI feedback for the two or more cells indicated by the RRC signal.
2. The method according to claim 1, further comprising:
measuring the CSI of the cells indicated by the RRC signal.
3. The method according to claim 1, wherein the CSI request field is included in a downlink control information (DCI) format 0.
4. The method according to claim 1, wherein the PUSCH signal is transmitted four subframes after receiving the PDCCH signal.
5. A method for receiving aperiodic feedback of channel state information (CSI) in a wireless access system supporting multicarrier aggregation, the method comprising:
transmitting, by a base station (BS) to an user equipment (UE), a physical downlink control channel (PDCCH) signal including a CSI request field, the CSI request field indicating an aperiodic CSI feedback is triggered for two or more cells;
transmitting, by the BS to the UE, a radio resource control (RRC) signal indicating the two or more cells for which the aperiodic CSI feedback is triggered; and
receiving, by the BS from the UE, a physical uplink shared channel (PUSCH) signal including the aperiodic CSI feedback for the two or more cells indicated by the RRC signal.
6. The method according to claim 5, wherein the CSI request field is included in a downlink control information (DCI) format 0.
7. The method according to claim 5, wherein the PUSCH signal is received four subframes after receiving the PDCCH signal.
8. A user equipment (UE) for aperiodic feedback of channel state information (CSI) in a wireless access system supporting multicarrier aggregation, the UE comprising:
a transmission module;
a reception module; and
a processor for supporting the aperiodically feedback the CSI,
wherein processor controls the reception module to receive a physical downlink control channel (PDCCH) signal from a base station (BS), the PDCCH signal including a CSI request field which indicates an aperiodic CSI feedback is triggered for two or more cells, and receive a radio resource control (RRC) signal indicating two or more cells which the aperiodic CSI feedback is triggered from the BS; and
wherein the processor controls the transmission module to transmit a physical uplink shared channel (PUSCH) signal to the BS, the PUSCH signal including the aperiodic CSI feedback for the two or more cells indicated by the RRC signal.
9. The user equipment according to claim 8, wherein the processor further measures the CSI of the cells indicated by the RRC signal.
10. The user equipment according to claim 8, wherein the CSI request field is included in a downlink control information (DCI) format 0.
11. The user equipment according to claim 8, wherein the PUSCH signal is transmitted four subframes after receiving the PDCCH signal.
12. A base station (BS) for receiving aperiodic feedback of channel state information (CSI) in a wireless access system supporting multicarrier aggregation, the BS comprising:
a transmission module;
a reception module; and
a processor for supporting to receive the aperiodically feedback the CSI,
wherein the processor controls the transmission module to transmit a physical downlink control channel (PDCCH) signal to a user equipment (UE), the PDCCH signal including a CSI request field which indicates an aperiodic CSI feedback is triggered for two or more cells, and transmit a radio resource control (RRC) signal indicating the two or more cells which the aperiodic CSI feedback is triggered to the UE; and
wherein the processor further controls the reception module to receive a physical uplink shared channel (PUSCH) signal from the UE, the PUSCH signal including the aperiodic CSI feedback for the two or more cells indicated by the RRC signal.
13. The base station according to claim 12, wherein the CSI request field is included in a downlink control information (DCI) format 0.
14. The base station according to claim 12, wherein the PUSCH signal is received four subframes after receiving the PDCCH signal.
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Patent number:US9094966B2
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