1. A method for controlling Physical Uplink Control Channel (PUCCH) power, the method comprising:
determining, by a User Equipment (UE), one or more uplink carriers for PUCCH transmission in a current uplink subframe, wherein the one or more uplink carriers are at least one of uplink carriers used to transmit Uplink Control Information (UCI) via PUCCHs for respective sets of carriers of the UE, each set of carriers of the UE corresponds to one of the uplink carriers used to transmit UCI, and the uplink carriers used to transmit UCI corresponding to different sets of carriers are different from each other;
determining, by the UE, a power adjustment cumulative amount corresponding to a PUCCH to be transmitted on each of the one or more uplink carriers for PUCCH transmission in the current uplink subframe, based upon at least one Transmission Power Control (TPC) command received on at least one downlink carrier among at least one set of carriers for which UCI is to be transmitted via the PUCCH on the each of the one or more uplink carriers in the current uplink subframe; and
determining, by the UE, transmit power of the PUCCH to be transmitted on the each of the one or more uplink carriers for PUCCH transmission in the current uplink subframe, based upon PUCCH power control parameters corresponding to the each of the one or more uplink carriers and the power adjustment cumulative amount corresponding to the each of the one or more uplink carriers;
wherein determining, by the UE, the power adjustment cumulative amount corresponding to the PUCCH to be transmitted on the each of one or more uplink carriers for PUCCH transmission in the current uplink subframe, based upon the at least one TPC command received on the at least one downlink carrier among the at least one set of carriers for which UCI is to be transmitted via the PUCCH on the each of the one or more uplink carriers in the current uplink subframe comprises:
determining, by the UE, that the power adjustment cumulative amount g(i) corresponding to the PUCCH to be transmitted on the each of the one or more uplink carriers in the current uplink subframe i is the sum of power adjustment amounts ?PUCCH respectively indicated by Physical Downlink Control Channels (PDCCHs)/Enhanced Physical Downlink Control Channels (EPDCCHs) received, on the at least one downlink carrier among the at least one set of carriers, in M downlink subframes of the at least one set of carriers and a power adjustment cumulative amount g(i?1) corresponding to a PUCCH on the each of the one or more uplink carriers in a uplink subframe preceding the current uplink subframe, wherein the power adjustment amounts are ?PUCCH are indicated respectively by TPC commands carried in the PDCCHs/EPDCCHs, and M represents the number of downlink subframes, in each set of the at least one set of carriers for which UCI is to be transmitted via the PUCCH on the each of the one or more uplink carriers, for which Acknowledgement/Non-Acknowledgement (ACK/NACK) of downlink data needs to be fed back in the current uplink subframe i.
2. The method according to claim 1, wherein before the UE determines the one or more uplink carriers for PUCCH transmission in the current uplink subframe, the method further comprises:
determining, by the UE, that N configured carriers of the UE are grouped into A sets of carriers and determining the uplink carriers used to transmit UCI via PUCCHs for the respective sets of carriers, according to a received configuration information transmitted by the network side or as predefined with the network side, wherein 1?A?N, and each set of carriers comprises at least one carrier.
3. The method according to claim 1, wherein the power adjustment amounts ?PUCCH respectively indicated by the PDCCHs/EPDCCHs received by the UE, on the at least one downlink carrier among the at least one set of carriers, in the M downlink subframes of the at least one set of carriers comprise:
power adjustment amounts ?PUCCH respectively indicated by PDCCHs/EPDCCHs received by the UE, on one downlink carrier dedicated in one set of carriers for which UCI is to be transmitted via the PUCCH on the each of the one or more uplink carriers, in M downlink subframes of the set of carriers; or
power adjustment amounts ?PUCCH respectively indicated by PDCCHs/EPDCCHs received by the UE, on any one downlink carrier among one set of carriers for which UCI is to be transmitted via the PUCCH on the each of the one or more uplink carriers, in M downlink subframes of the one set of carriers; or
power adjustment amounts ?PUCCH respectively indicated by PDCCHs/EPDCCHs received by the UE, on all downlink carriers of one set of carriers for which UCI is to be transmitted via the PUCCH on the each of the one or more uplink carriers, in M downlink subframes of the one set of carriers; or
power adjustment amounts ?PUCCH respectively indicated by PDCCHs/EPDCCHs received by the UE, on one downlink carrier dedicated in one set of carriers determined among a plurality of sets of carriers for which UCI is to be transmitted via the PUCCH on the each of the one or more uplink carriers, in M downlink subframes of the determined one set of carriers; or
power adjustment amounts ?PUCCH respectively indicated by PDCCHs/EPDCCHs received by the UE, on any one downlink carrier among one set of carriers determined among a plurality of sets of carriers for which UCI is to be transmitted via the PUCCH on the each of the one or more uplink carriers, in M downlink subframes of the determined one set of carriers; or
power adjustment amounts ?PUCCH respectively indicated by PDCCHs/EPDCCHs received by the UE, on all downlink carriers of one set of carriers determined among a plurality of sets of carriers for which UCI is to be transmitted via the PUCCH on the each of the one or more uplink carriers, in M downlink subframes of the determined one set of carriers; or
power adjustment amounts ?PUCCH respectively indicated by PDCCHs/EPDCCHs received by the UE, on one downlink carrier dedicated in each of a plurality of sets of carriers for which UCI is to be transmitted via the PUCCH on the each of the one or more uplink carriers, in M downlink subframes of the each of the plurality of sets of carriers; or
power adjustment amounts ?PUCCH respectively indicated by PDCCHs/EPDCCHs received by the UE, on any one downlink carrier among each of a plurality of sets of carriers for which UCI is to be transmitted via the PUCCH on the each of the one or more uplink carriers, in M downlink subframes of the each of the plurality of sets of carriers; or
power adjustment amounts ?PUCCH respectively indicated by PDCCHs/EPDCCHs received by the UE, on any one downlink carrier among a plurality of sets of carriers for which UCI is to be transmitted via the PUCCH on the each of the one or more uplink carriers, in M downlink subframes of the plurality of sets of carriers; or
power adjustment amounts ?PUCCH respectively indicated by PDCCHs/EPDCCHs received by the UE, on all downlink carriers of each of a plurality of sets of carriers for which UCI is to be transmitted via the PUCCH on the each of the one or more uplink carriers, in M downlink subframes of the each of the plurality of sets of carriers.
4. The method according to claim 3, wherein the dedicated one downlink carrier is:
such a downlink carrier among the one set of carriers that is paired with the each of the one or more uplink carriers.
5. The method according to claim 1, wherein each of the PDCCHs/EPDCCHs is a PDCCH/EPDCCH in which a TPC field is not reused to indicate ACK/NACK resource.
6. The method according to claim 5, wherein for the UE configured to transmit ACK/NACK using the PUCCH format 3, each of the PDCCHs/EPDCCHs is:
a PDCCH/EPDCCH transmitted on a Primary Component Carrier (PCC), and Downlink Assignments Index (DAI) value in the PDCCH/EPDCCH is equal to �1�; or
a PDCCH/EPDCCH used to schedule the PCC, and the DAI value in the PDCCH/EPDCCH is equal to �1�; or
a PDCCH/EPDCCH transmitted on a downlink carrier, paired with the each of the one or more uplink carriers, in each of the at least one set of carriers, and the DAI value in the PDCCH/EPDCCH is equal to �1�; or
a PDCCH/EPDCCH used to schedule a downlink carrier, paired with the each of the one or more uplink carriers, in each of the at least one set of carriers, and the DAI value in the PDCCH/EPDCCH is equal to �1�; and
for the UE configured to transmit ACK/NACK using the PUCCH format 1b with channel selection, each of the PDCCHs/EPDCCHs is:
a PDCCH/EPDCCH transmitted on a PCC; or
a PDCCH/EPDCCH transmitted on a downlink carrier, paired with the each of the one or more uplink carriers, in each of the at least one set of carriers.
7. The method according to claim 1, wherein the PUCCH power control parameters are:
carrier specific parameters preconfigured by the network side through higher-layer signaling separately for each uplink carrier available for PUCCH transmission.
8. The method according to claim 7, wherein the PUCCH power control parameters comprise:
a carrier specific PUCCH initial power PO �NOMINAL �PUCCH,c, a carrier and UE specific PUCCH initial power PO _ UE _ PUCCH,c, a carrier and UE specific power offset ?F _ PUCCH,c(F) related to a PUCCH transmission format, and a carrier and UE specific power offset ?TxD,c(F?) related to PUCCH transmission via two antenna ports, preconfigured by the network side through higher-layer signaling separately for each uplink carrier available for PUCCH transmission, wherein c represents a carrier index.
9. The method according to claim 1, wherein the UCI comprises one or more of ACK/NACK, periodic Channel State Information (CSI), and Scheduling Request (SR).
10. A device for controlling Physical Uplink Control Channel (PUCCH) power, the device comprising:
an uplink carrier determining unit, configured to determine one or more uplink carriers for PUCCH transmission in a current uplink subframe, wherein the one or more uplink carriers are at least one of uplink carriers used to transmit Uplink Control Information (UCI) via PUCCHs for respective sets of carriers of a UE, each set of carriers of the UE corresponds to one of the uplink carriers used to transmit UCI, and the uplink carriers used to transmit UCI corresponding to different sets of carriers are different from each other;
a power adjustment cumulative amount determining unit, configured to determine a power adjustment cumulative amount corresponding to the PUCCH to be transmitted on each of one or more uplink carriers for PUCCH transmission in the current uplink subframe, based upon at least one TPC command received on at least one downlink carrier among at least one set of carriers for which UCI is to be transmitted via the PUCCH on the each of one or more uplink carriers in the current uplink subframe; and
a transmit power determining unit configured to determine transmit power of the PUCCH to be transmitted on the each of the one or more uplink carriers for PUCCH transmission in the current uplink subframe, based upon PUCCH power control parameters corresponding to the each of the one or more uplink carriers and the power adjustment cumulative amount corresponding to the each of the one or more uplink carriers;
wherein the power adjustment cumulative amount determining unit, configured to determine the power adjustment cumulative amount corresponding to the PUCCH to be transmitted on the each of the one or more uplink carriers for PUCCH transmission in the current uplink subframe, based upon the at least one TPC command received on the at least one downlink carrier among the at least one set of carriers for which UCI is to be transmitted via the PUCCH on the each of the one or more uplink carriers in the current uplink subframe, is configured
to determine that the power adjustment cumulative amount g(i) corresponding to the PUCCH to be transmitted on the each of the one or more uplink carriers in the current uplink subframe i is the sum of power adjustment amounts ?PUCCH respectively indicated by PDCCHs/EPDCCHs received, on the at least one downlink carrier among the at least one set of carriers, in M downlink subframes of the at least one set of carriers and a power adjustment cumulative amount g (i?1) corresponding to a PUCCH on the each of the one or more uplink carriers in a uplink subframe preceding the current uplink subframe, wherein the power adjustment amounts ?PUCCH are indicated respectively by TPC commands carried in the PDCCHs/EPDCCHs, and M represents the number of downlink subframes, in each set of the at least one set of carriers for which UCI is to be transmitted via the PUCCH on the each of the one or more uplink carriers, for which ACK/NACK of downlink data needs to be fed back in the current uplink subframe i.
11. The device according to claim 10, wherein the uplink carrier determining unit is further configured:
before the one or more uplink carriers for PUCCH transmission in the current uplink subframe are determined, to determine that N configured carriers for the UE are grouped into A sets of carriers and to determine the uplink carriers used to transmit UCI via PUCCHs for the respective sets of carriers according to a received configuration information transmitted by the network side or as predefined with the network side, wherein 1?A?N, and each set of carriers comprises at least one carrier.
12. The device according to claim 10, wherein the power adjustment amounts ?PUCCH respectively indicated by the PDCCHs/EPDCCHs received on the at least one downlink carrier among the at least one set of carriers in the M downlink subframes of the at least one set of carriers comprise:
power adjustment amounts ?PUCCH respectively indicated by PDCCHs/EPDCCHs received, on one downlink carrier dedicated in one set of carriers for which UCI is to be transmitted via the PUCCH on the each of the one or more uplink carriers, in M downlink subframes of the set of carriers; or
power adjustment amounts ?PUCCH respectively indicated by PDCCHs/EPDCCHs received, on any one downlink carrier among one set of carriers for which UCI is to be transmitted via the PUCCH on the each of the one or more uplink carriers, in M downlink subframes of the one set of carriers; or
power adjustment amounts ?PUCCH respectively indicated by PDCCHs/EPDCCHs received, on all downlink carriers of one set of carriers for which UCI is to be transmitted via the PUCCH on the each of the one or more uplink carriers, in M downlink subframes of the one set of carriers; or
power adjustment amounts ?PUCCH respectively indicated by PDCCHs/EPDCCHs received, on one downlink carrier dedicated in one set of carriers determined among a plurality of sets of carriers for which UCI is to be transmitted via the PUCCH on the each of the one or more uplink carriers, in M downlink subframes of the determined set of carriers; or
power adjustment amounts ?PUCCH respectively indicated by PDCCHs/EPDCCHs received, on any one downlink carrier among one set of carriers determined among a plurality of sets of carriers for which UCI is to be transmitted via the PUCCH on the each of the one or more uplink carriers, in M downlink subframes of the determined one set of carriers; or
power adjustment amounts ?PUCCH respectively indicated by PDCCHs/EPDCCHs received, on all downlink carriers of one set of carriers determined among a plurality of sets of carriers for which UCI is to be transmitted via the PUCCH on the each of the one or more uplink carriers, in M downlink subframes of the determined one set of carriers; or
power adjustment amounts ?PUCCH respectively indicated by PDCCHs/EPDCCHs received, on one downlink carrier dedicated in each of a plurality of sets of carriers for which UCI is to be transmitted via the PUCCH on the each of the one or more uplink carriers, in M downlink subframes of the each of the plurality of sets of carriers; or
power adjustment amounts ?PUCCH respectively indicated by PDCCHs/EPDCCHs received, on any one downlink carrier among each of a plurality of sets of carriers for which UCI is to be transmitted via the PUCCH on the each of the one or more uplink carriers, in M downlink subframes of the each of the plurality sets of carriers; or
power adjustment amounts ?PUCCH respectively indicated by PDCCHs/EPDCCHs received, on any one downlink carrier among a plurality of sets of carriers for which UCI is to be transmitted via the PUCCH on the each of the one or more uplink carriers, in M downlink subframes of the plurality of sets of carriers; or
power adjustment amounts ?PUCCH respectively indicated by PDCCHs/EPDCCHs received, on all downlink carriers of each of a plurality of sets of carriers for which UCI is to be transmitted via the PUCCH on the each of the one or more uplink carriers, in M downlink subframes of the each of the plurality of sets of carriers.
13. The device according to claim 12, wherein the power adjustment cumulative amount is further configured:
to determine the dedicated one downlink carrier as such a downlink carrier among the one set of carriers that is paired with the each of the one or more uplink carriers.
14. The device according to claim 10, wherein the power adjustment cumulative amount is further configured:
to determine the each of the PDCCHs/EPDCCHs is a PDCCH/EPDCCH in which a TPC field is not reused to indicate ACK/NACK resource.
15. The device according to claim 14, wherein for the UE configured to transmit ACK/NACK in the PUCCH format 3, the power adjustment cumulative amount is further configured:
to determine the each of the PDCCHs/EPDCCHs as:
a PDCCH/EPDCCH transmitted on a Primary Component Carrier (PCC), and Downlink Assignments Index (DAI) value in the PDCCH/EPDCCH is equal to �1�; or
a PDCCH/EPDCCH used to schedule the PCC, and the DAI value in the PDCCH/EPDCCH is equal to �1�; or
a PDCCH/EPDCCH transmitted on a downlink carrier, paired with the each of the one or more uplink carriers, in each of the at least one set of carriers, and the DAI value in the PDCCH/EPDCCH is equal to �1�; or
a PDCCH/EPDCCH used to schedule a downlink carrier, paired with the each of the one or more uplink carriers, in each of the at least one set of carriers, and the DAI value in the PDCCH/EPDCCH is equal to �1�; and
for the UE configured to transmit ACK/NACK using the PUCCH format 1b with channel selection, the power adjustment cumulative amount is further configured:
to determine the each of the PDCCHs/EPDCCHs as:
a PDCCH/EPDCCH transmitted on a PCC; or
a PDCCH/EPDCCH transmitted on a downlink carrier, paired with the each of the one or more uplink carriers, in each of the at least one set of carriers.
16. The device according to claim 10, wherein the transmit power determining unit is further configured:
to obtain the PUCCH power control parameters which are carrier specific parameters preconfigured by the network side through higher-layer signaling separately for each uplink carrier available for PUCCH transmission.
17. The device according to claim 16, wherein the transmit power determining unit configured to obtain the PUCCH power control parameters is configured:
to obtain the following PUCCH power control parameters:
a carrier specific PUCCH initial power PO _ NOMINAL _ PUCCH,c, a carrier and UE specific PUCCH initial power PO _ UE _ PUCCH,c, a carrier and UE specific power offset ?F _ PUCCH,c(F) related to a PUCCH transmission format, and a carrier and UE specific power offset ?TxD,c(F?) related to PUCCH transmission via two antenna ports, preconfigured by the network side through higher-layer signaling separately for each uplink carrier available for PUCCH transmission, wherein c represents a carrier index.
18. The device according to claim 10, wherein the UCI comprises one or more of ACK/NACK, periodical CSI, and an SR.