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.
Technologies
Resource configuration
Product
Use Cases
Wireless communication
Services
Claim
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; transmitting channel state information associated with one or more channels, which are generated using the channel candidate information; and adding, as the secondary cell, a channel that the base station selects based on the channel state information.
2. The method as claimed in claim 1, 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,
wherein the channel candidate information is received through a high layer signaling of a primary cell.
3. The method as claimed in claim 1, wherein the channel state information includes at least one of i) information on whether each of the one or more channels is used and ii) signal strength information.
4. The method as claimed in claim 1, further comprising:
transmitting at least one of channel information of a primary cell and reference signal measurement information associated with the secondary cell, wherein the base station selects a channel of the secondary cell by further using location information of the UE which is calculated based on at least one of the channel information of the primary cell and the reference signal measurement information associated with the secondary cell.
5. The method as claimed in claim 1, further comprising:
receiving a reference signal of the secondary cell from the base station, wherein the reference signal of the secondary cell is a cell specific reference signal that is transmitted in a channel of the unlicensed frequency band by using physical cell identification information that is the same as that of the primary cell.
6. The method as claimed in claim 1, wherein the channel candidate information further includes at least one of transmission power information of a secondary cell reference signal, transmission location information, and transmission period information.
7. A method for a base station to configure carrier aggregation (CA), the method comprising:
transmitting, to a user equipment (UE), channel candidate information of a secondary cell that uses an unlicensed frequency band; receiving channel state information associated with one or more channels, which are generated based on the channel candidate information; and additionally, configuring a channel having the smallest signal interference as a secondary cell of the UE, based on the channel state information.
8. The method as claimed in claim 7, 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,
wherein the channel candidate information is transmitted through a high layer signaling of a primary cell.
9. The method as claimed in claim 7, wherein the channel state information includes at least one of information associated with whether each of the one or more channels is used and signal strength information.
10. The method as claimed in claim 7, further comprising:
receiving channel information of a primary cell or reference signal measurement information associated with the secondary cell; and calculating location information of the UE based on at least one of the channel information of the primary cell and the reference signal measurement information associated with the secondary cell, wherein a channel that is additionally configured as the secondary cell is selected based on the channel state information and the location information of the UE.
11. The method as claimed in claim 7, further comprising:
transmitting, to the UE, a reference signal of the secondary cell, wherein the reference signal of the secondary cell is a cell specific reference signal that is transmitted in a channel of the unlicensed frequency band by using physical cell identification information that is the same as that of the primary cell.
12. The method as claimed in claim 7, wherein the channel candidate information further includes at least one of transmission power information of the secondary cell reference signal, transmission location information, and transmission period information.
13. A user equipment (UE) that performs carrier aggregation, the UE comprising:
a receiving unit configured to receive, from a base station, channel candidate information of a secondary cell that uses an unlicensed frequency band; a transmitting unit configured to transmit channel state information associated with one or more channels, which are generated using the channel candidate information; and a controller configured to add, as the secondary cell, a channel that the base station selects based on the channel state information.
14. The UE as claimed in claim 13, 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,
wherein the channel candidate information is received through a high layer signaling of a primary cell.
15. The UE as claimed in claim 13, wherein the channel state information includes at least one of information associated with whether each of the one or more channels is used and signal strength information.
16. The UE as claimed in claim 13, wherein the transmitting unit further transmits channel information of a primary cell or reference signal measurement information associated with the secondary cell,
wherein the base station selects a channel of the secondary cell by further using location information of the UE that is calculated based on at least one of the channel information of the primary cell and the reference signal measurement information associated with the secondary cell.
17. The UE as claimed in claim 13, wherein the receiving unit further receives a reference signal of the secondary cell from the base station,
wherein the reference signal of the secondary cell is a cell specific reference signal that is transmitted in a channel of the unlicensed frequency band by using physical cell identification information that is the same as that of the primary cell.
18. The UE as claimed in claim 13, wherein the channel candidate information further includes at least one of transmission power information of a secondary cell reference signal, transmission location information, and transmission period information.
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Note:
The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
The information in grey was provided by the patent holder
The information in purple was extracted from the FrandAvenue
Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.