Carrier aggregation configuration method and device for same
First Claim
Patent Images
1. A method for a user equipment (UE) to perform carrier aggregation (CA), the method comprising:
- receiving channel candidate information of a secondary cell that uses an unlicensed frequency band from a base station;
receiving a reference signal of the secondary cell transmitted through one or more channels of the unlicensed frequency band from the base station;
transmitting channel state information associated with the one or more channels, which are generated using the channel candidate information; and
adding, as the secondary cell, an unlicensed band channel that the base station selects based on the channel state information,wherein the reference signal of the secondary cell is a cell specific reference signal generated using physical cell identification information that is configured for the secondary cell and is independent of physical cell identification information of a primary cell,wherein the channel state information includes i) a received signal strength indicator associated with each of the one or more channels and ii) information on whether each of the one or more channels is used, determined by the received signal strength indicator,wherein the channel candidate information includes at least one of unlicensed frequency band information associated with each of the one or more channels, information associated with the number of channel candidates, and channel candidate list information, andwherein the channel candidate information is received through a high layer signaling of the primary cell.
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Abstract
Provided are a method and a device for selecting a channel of an unlicensed band in configuring carrier aggregation for a terminal using an unlicensed band cell which uses an unlicensed frequency band. The method may include: receiving, from a base station, channel candidate information of a secondary cell using an unlicensed frequency band; transmitting channel state information with respect to one or more channels generated using the channel candidate information; and adding, as the secondary cell, a channel selected on the basis of the channel state information by the base station; and a device.
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Citations
12 Claims
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1. A method for a user equipment (UE) to perform carrier aggregation (CA), the method comprising:
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receiving channel candidate information of a secondary cell that uses an unlicensed frequency band from a base station; receiving a reference signal of the secondary cell transmitted through one or more channels of the unlicensed frequency band from the base station; transmitting channel state information associated with the one or more channels, which are generated using the channel candidate information; and adding, as the secondary cell, an unlicensed band channel that the base station selects based on the channel state information, wherein the reference signal of the secondary cell is a cell specific reference signal generated using physical cell identification information that is configured for the secondary cell and is independent of physical cell identification information of a primary cell, wherein the channel state information includes i) a received signal strength indicator associated with each of the one or more channels and ii) information on whether each of the one or more channels is used, determined by the received signal strength indicator, wherein the channel candidate information includes at least one of unlicensed frequency band information associated with each of the one or more channels, information associated with the number of channel candidates, and channel candidate list information, and wherein the channel candidate information is received through a high layer signaling of the primary cell. - View Dependent Claims (2, 3, 4)
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5. A method for a base station to configure carrier aggregation (CA), the method comprising:
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transmitting, to a user equipment (UE), channel candidate information of a secondary cell that uses an unlicensed frequency band; transmitting, through one or more channels of the unlicensed frequency band, a reference signal of the secondary cell to the UE; receiving channel state information associated with the one or more channels, which are generated based on the channel candidate information; and additionally, configuring an unlicensed band channel having the smallest signal interference as a secondary cell of the UE, based on the channel state information, wherein the reference signal of the secondary cell is a cell specific reference signal generated using physical cell identification information that is configured for the secondary cell and is independent of physical cell identification information of a primary cell, wherein the channel state information includes i) a received signal strength indicator associated with each of the one or more channels and ii) information on whether each of the one or more channels is used, determined by the received signal strength indicator, wherein the channel candidate information includes at least one of unlicensed frequency band information associated with each of the one or more channels, information associated with the number of channel candidates, and channel candidate list information, and wherein the channel candidate information is received through a high layer signaling of the primary cell. - View Dependent Claims (6, 7, 8)
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9. A user equipment (UE) that performs carrier aggregation, the UE comprising:
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a receiving unit configured to receive, from a base station, channel candidate information of a secondary cell that uses an unlicensed frequency band and to receive a reference signal of the secondary cell transmitted through one or more channels of the unlicensed frequency band from the base station; a transmitting unit configured to transmit channel state information associated with the one or more channels, which are generated using the channel candidate information; and a controller configured to add, as the secondary cell, an unlicensed band channel that the base station selects based on the channel state information, wherein the reference signal of the second cell is a cell specific reference signal generated using physical cell identification information that is configured for the secondary cell and is independent of physical cell identification information of a primary cell, and wherein the channel state information includes i) a received signal strength indicator associated with each of the one or more channels and ii) information on whether each of the one or more channels is used, determined by the received signal strength indicator. - View Dependent Claims (10, 11, 12)
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Specification