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US 10,375,649 B2Granted
Method and apparatus for controlling transmission power of uplink control channel
AssigneeLG Electronics Inc.
InventorsDong Youn Seo, Joon Kui Ahn
Life of this patent
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Abstract
The present invention provides a method for controlling transmission power of an uplink control channel carried out by an user equipment in a wireless communication system and an user equipment using the method. The method comprises: receiving uplink power control information; and determining transmission power of an uplink control channel based on the uplink power control information, wherein the uplink power control information includes a power offset value determined according to whether transmit diversity is applied when the uplink control channel is transmitted through a channel selection scheme.
Claims14
A method for controlling transmission power of a physical uplink control channel (PUCCH), performed by a user equipment (UE), in a wireless communication system, the method comprising:
- receiving uplink power control information;
- receiving physical downlink control channels (PDCCHs);
- receiving physical downlink shared channels (PDSCHs) scheduled by the PDCCHs through at least one serving cell;
- determining transmission power for the PUCCH based on the uplink power control information;
- and transmitting ACK/NACK (acknowledgement/negative-acknowledgement) information for the PDSCHs through the PUCCH at the determined transmission power using two resources,
- wherein the uplink power control information includes a transmit diversity power offset value determined according to whether the PUCCH is transmitted using transmit diversity and whether the PUCCH is transmitted using a channel selection scheme,
- wherein a set of candidate values for the transmit diversity offset corresponding to each of a plurality PUCCH formats, none of which use a channel selection scheme, are the same,
- wherein only a set of candidate values for the transmit diversity power offset corresponding to one of the plurality of PUCCH formats, which uses a channel election scheme, is different from the set of candidate values for the transmit diversity power offset corresponding to each of the remaining PUCCH formats, none of which use a channel selection scheme,
- wherein a first resource among the two resources is determined based on a lowest control channel element (CCE) index of the PDCCH and a second resource among the two resources is determined based on a ‘lowest CCE index of the PDCCH+1’,
- wherein when the UE supports aggregating up to two serving cells and when two serving cells are allocated to the UE, the UE transmits the ACK/NACK information using the channel selection scheme, and
- wherein when the UE supports aggregating three or more serving cells and when two or more serving cells are allocated to the UE, the UE transmits the ACK/NACK information using the channel selection scheme or PUCCH format 3 based on a higher layer signal.
8 more elements
A user equipment (UE) comprising:
- a transceiver that transmits and receives radio signals;
- and a processor operationally connected to the transceiver, wherein the processor is configured to:
- receive uplink power control information;
- receive physical downlink control channels (PDCCHs);
- receive physical downlink shared channels (PDSCHs) scheduled by the PDCCHs through at least one serving cell;
- determine transmission power for a physical uplink control channel (PUCCH) based on the uplink power control information;
- and transmit ACK/NACK (acknowledgement/negative-acknowledgement) information for the PDSCHs through the PUCCH at the determined transmission power using two resources, wherein the uplink power control information includes a transmit diversity power offset value determined according to whether the PUCCH is transmitted using transmit diversity and whether the PUCCH is transmitted using a channel selection scheme,
- wherein a set of candidate values for the transmit diversity offset corresponding to each of a plurality PUCCH formats, none of which use a channel selection scheme, are the same,
- wherein only a set of candidate values for the transmit diversity power offset corresponding to one of the plurality of PUCCH formats, which uses a channel election scheme, is different from the set of candidate values for the transmit diversity power offset corresponding to each of the remaining PUCCH formats, none of which use a channel selection scheme,
- wherein a first resource among the two resources is determined based on a lowest control channel element (CCE) index of the PDCCH and a second resource among the two resources is determined based on a ‘lowest CCE index of the PDCCH+1’,
- wherein when the UE supports aggregating up to two serving cells and when two serving cells are allocated to the UE, the UE transmits the ACK/NACK information using the channel selection scheme, and
- wherein when the UE supports aggregating three or more serving cells and when two or more serving cells are allocated to the UE, the UE transmits the ACK/NACK information using the channel selection scheme or PUCCH format 3 based on a higher layer signal.
9 more elements
Dependencies are inferred from the claim text.