Power determining method and user equipment
The application provides a method for power determining. UE is configured with multiple cells, a first subframe of a first cell corresponds to multiple second subframes of a second cell, and the method includes: calculating a first power requirement on the first subframe, and calculating multiple second power requirements on the multiple second subframes; calculating a power indicator on the multiple second subframes according to the multiple second power requirements; and determining transmit powers on the first subframe and the multiple second subframes according to a magnitude relationship between a maximum transmit power and a sum of the first power requirement and the power indicator. In the application, the power indicator is determined for multiple subframes of the second cell.
1. A method for a User equipment (UE) to determine power, wherein a user equipment UE is configured with multiple cells, a first subframe of a first cell corresponds to N second subframes of a second cell, and the method comprises:
calculating, by the UE, a first power requirement on the first subframe, and N second power requirements on the N second subframes;
calculating, by the UE, a power indicator on the N second subframes according to the N second power requirements; and
determining, by the UE, transmit powers on the first subframe and the N second subframes according to a magnitude relationship between a maximum transmit power and a sum of the first power requirement and the power indicator, wherein
the first subframe is denoted as a subframe i, the N second subframes are denoted as subframes i1, i2, . . . , and iN, the first power requirement is denoted as P req _ c1 (i), the second power requirement is denoted as P req _ c2 (ij), the maximum transmit power corresponding to the first subframe i is denoted as P MAX (i), N is a positive integer greater than 1, and a value range of j is 1 to N.
2. The method according to claim 1 , wherein if at least one second subframe of the N second subframes transmits a physical uplink control channel PUCCH and/or a physical uplink shared channel PUSCH, P req _ c2 (ij) is equal to P PUCCH,c2 (ij)+P PUSCH,c2 (ij); and
the calculating a power indicator on the N second subframes according to the N second power requirements comprises:
denoting the power indicator as P req _ c2 (i), and calculating the power indicator by using the following formula: P req _ c2 (i)=P PUCCH,c2 (i)+P PUSCH,c2 (i), wherein
P PUCCH,c2 (i) represents a PUCCH power indicator on the N second subframes, wherein P PUCCH,c2 (i) satisfies one of the following conditions:
P PUCCH,c2 ( i )=max{ P PUCCH,c2 ( i 1), P PUCCH,c2 ( i 2), . . . , P PUCCH,c2 ( iN )};
P PUCCH,c2 ( i )=min{ P PUCCH,c2 ( i 1), P PUCCH,c2 ( i 2), . . . , P PUCCH,c2 ( iN )}; or
P PUCCH,c2 ( i )=α×( P PUCCH,c2 ( i 1)+ P PUCCH,c2 ( i 2)+ . . . + P PUCCH,c2 ( iN )); and
P PUSCH,c2 (i) represents a PUSCH power indicator on the N second subframes, wherein P PUSCH,c2 (i) satisfies one of the following conditions:
P PUSCH,c2 ( i )=max{ P PUSCH,c2 ( i 1), P PUSCH,c2 ( i 2), . . . , P PUSCH,c2 ( iN )};
P PUSCH,c2 ( i )=min{ P PUSCH,c2 ( i 1), P PUSCH,c2 ( i 2), . . . , P PUSCH,c2 ( iN )}; or
P PUSCH,c2 ( i )=α×( P PUSCH,c2 ( i 1)+ P PUSCH,c2 ( i 2)+ . . . + P PUSCH,c2 ( iN )), wherein
max represents using a maximum value, min represents using a minimum value, α is a power parameter, and the power parameter is preconfigured or the power parameter is pre-obtained by the UE from a base station.
3. The method according to claim 2 , wherein the first subframe transmits a physical random access channel PRACH; and
the determining transmit powers on the first subframe and the N second subframes comprises:
if P req _ c1 (i)+P req _ c2 (i)>P MAX (i), using P req _ c1 (i) as a transmit power on the first subframe i, and using w c2,4 (ij)×P req _ c2 (ij) as a transmit power on a second subframe ij, so that P req _ c1 (i)+w c2,4 (ij)×P req _ c2 (i)≤P MAX (i), wherein 0≤w c2,4 (ij)<1.
4. The method according to claim 2 , wherein the determining transmit powers on the first subframe and the N second subframes comprises:
if P req _ c1 (i)+P req _ c2 (i)≤P MAX (i), determining that a transmit power on the first subframe is P req _ c1 (i), and determining that transmit powers on the N second subframes are P req _ c2 (i);
if P req _ c1 (i)+P req _ c2 (i)>P MAX (i) and P req _ c1 (i)≤P c1 (i), determining that a transmit power on the first subframe is P req _ c1 (i), and determining that transmit powers on the N second subframes are P MAX (i)−P req _ c1 (i);
if P req _ c1 (i)+P req _ c2 (i)>P MAX (i) and P req _ c2 (i)≤max{P c2 (i1), . . . , P c2 (iN)}, determining that a transmit power on the first subframe is P MAX (i)−P req _ c2 (i), and determining that transmit powers on the N second subframes are P req _ c2 (i); and
if P req _ c1 (i)+P req _ c2 (i)>P MAX (i), P req _ c1 (i)>P c1 (i), and P req _ c2 (i)>max{P c2 (i1), . . . , P c2 (iN)}, determining that a transmit power on the first subframe is P c1 (i)+P alloc _ c1 (i), and determining that transmit powers on the N second subframes are P MAX (i)−P c1 (i)−P alloc _ c1 (i), wherein
if a priority of the first cell is higher than a priority of the second cell, P alloc _ c1 (i) meets that P alloc _ c1 (i)=min{P MAX (i)−max{P c2 (i1), . . . , P c2 (iN)}−P c1 (i), P req _ c1 (i)−P c1 (i)};
if a priority of the second cell is higher than a priority of the first cell, P alloc _ c1 meets that P alloc _ c1 (i)=min{P MAX (i)−P c1 (i)−min{P MAX (i)−P c1 (i), P req _ c2 (i)}, P req _ c1 (i)−P c1 (i)}; or
if a priority of the first cell is the same as a priority of the second cell, P alloc _ c1 (i) meets that P alloc _ c1 (i)=β×(P MAX (i)−P c1 (i)−max{P c2 (i1), . . . , P c2 (iN)); or
P alloc _ c1 (i) meets that
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wherein
P c1 (i) and P c2 (ij) are respectively a minimum guaranteed power on the first subframe i of the first cell and a minimum guaranteed power on a second subframe ij of the second cell, β is a remaining power allocation parameter, and the remaining power allocation parameter is preconfigured or the remaining power allocation parameter is pre-obtained by the UE from the base station.
5. The method according to claim 1 , wherein if at least one second subframe of the N second subframes transmits a physical uplink control channel PUCCH and/or a physical uplink shared channel PUSCH, P req _ c2 (ij)=P PUCCH,c2 (ij)+P PUSCH,c2 (ij); and
the calculating a power indicator on the N second subframes according to the N second power requirements comprises:
denoting the power indicator as P req _ c2 (i), and calculating the power indicator by using the following formula:
P req _ c2 ( i )=max { P req _ c2 ( i 1), P req _ c2 ( i 2), . . . , P req _ c2 ( iN )}; or
P req _ c2 ( i )=min{ P req _ c2 ( i 1), P req _ c2 ( i 2), . . . , P req _ c2 ( iN )}; or
P req _ c2 ( i )=α×( P req _ c2 ( i 1)+ P req _ c2 ( i 2)+ . . . + P req _ c2 ( iN )), wherein
max represents using a maximum value, min represents using a minimum value, α is a power parameter, and the power parameter is preconfigured or the power parameter is pre-obtained by the UE from a base station.
6. A method for a User equipment (UE) to determine power, wherein user equipment UE is configured with multiple cells, a first subframe of a first cell corresponds to N second subframes of a second cell, and the method comprises:
calculating, by the UE, a first power requirement on the first subframe of the first cell, and calculating N second power requirements on the N second subframes of the second cell; and
determining a transmit power on the first subframe and transmit powers on the N second subframes according to a magnitude relationship between the first power requirement, the N second power requirements, and a maximum transmit power of the UE and with reference to priority information of the first cell and the second cell, wherein
the first subframe is denoted as a subframe i, the N second subframes are denoted as subframes i1, i2, . . . , and iN, the first power requirement is denoted as P req _ c1 (i), the second power requirement is denoted as P req _ c2 (ij), the maximum transmit power corresponding to the first subframe i is denoted as P MAX (i), N is a positive integer greater than 1, and a value range of j is 1 to N.
7. The method according to claim 6 , wherein:
if sending of the first cell and sending of the second cell are not aligned, the determining a transmit power on the first subframe and transmit powers on the second subframes comprises:
if a priority of the first cell is higher than a priority of the second cell, determining that a transmit power on a second subframe i1 sent before the first subframe i is min{P req _ c2 (i1), P c2 (i1)}, determining that the transmit power on the first subframe i is min{P MAX (i)−min{P req _ c2 (i1), P c2 (i1)}, P req _ c1 (i)}, and determining that a transmit power on a second subframe ik is min{P MAX (i)−min{P MAX (i)−min{P req _ c2 (i1), P c2 (i1)}, P req _ c1 (i)}, P req _ c2 (ik)}; and
if a priority of the second cell is higher than a priority of the first cell, determining that the transmit power on the first subframe i is min{P req _ c1 (i), P c1 (i)}, determining that a transmit power on a second subframe ik is min{P MAX (i)−min{P req _ c1 (i), P c1 (i)}, P req _ c2 (ik)}, and determining that a transmit power on a second subframe (i+1) 1 is min{P MAX (i+1)−P c1 (i+1), min{P MAX (i)−min{P req _ c1 (i), P c1 (i)}}, P req _ c2 ((i+1) 1)}, wherein
P c1 (i) and P c2 (ij) are respectively a minimum guaranteed power on the first subframe i of the first cell and a minimum guaranteed power on a second subframe ij of the second cell, and a value range of k is 2 to N.
8. The method according to claim 6 , wherein the first subframe is denoted as the subframe i, and the N second subframes are denoted as the subframes i1, i2, . . . , and iN; and
the determining a transmit power on the first subframe and transmit powers on the second subframes comprises:
determining that a transmit power on a second subframe ij is P′ c2 (ij), and determining that a transmit power on a symbol that is on the first subframe i and that corresponds to the second subframe ij is min{P c1 (i), P MAX (i)−P′ c2 (ij)}, wherein
P c1 (i) is a minimum guaranteed power on the first subframe i of the first cell.
9. A user equipment (UE), wherein the UE is configured with multiple cells, a first subframe of a first cell corresponds to N second subframes of a second cell, and the UE comprises:
a first calculation unit, configured to calculate a first power requirement on the first subframe, and calculate N second power requirements on the N second subframes;
a second calculation unit, configured to calculate a power indicator on the N second subframes according to the N second power requirements; and
a determining unit, configured to determine transmit powers on the first subframe and the N second subframes according to a magnitude relationship between a maximum transmit power and a sum of the first power requirement and the power indicator, wherein
the first subframe is denoted as a subframe i, the N second subframes are denoted as subframes i1, i2, . . . , and iN, the first power requirement is denoted as P req _ c1 (i), the second power requirement is denoted as P req _ c2 (ij), the maximum transmit power corresponding to the first subframe i is denoted as P MAX (i), N is a positive integer greater than 1, and a value range of j is 1 to N.
10. The user equipment according to claim 9 , wherein if at least one second subframe of the N second subframes transmits a physical uplink control channel PUCCH and/or a physical uplink shared channel PUSCH, P req _ c2 (ij)=P PUCCH,c2 (ij)+P PUSCH,c2 (ij); and
the second calculation unit is specifically configured to:
denote the power indicator as P req _ c2 (i), and calculate the power indicator by using the following formula: P req _ c2 (i)=P PUCCH,c2 (i)+P PUSCH,c2 (i), wherein
P PUCCH,c2 (i) represents a PUCCH power indicator on the N second subframes and satisfies one of the following conditions:
P PUCCH,c2 ( i )=max { P PUCCH,c2 ( i 1), P PUCCH,c2 ( i 2), . . . , P PUCCH,c2 ( iN )};
P PUCCH,c2 ( i )=min{ P PUCCH,c2 ( i 1), P PUCCH,c2 ( i 2), . . . , P PUCCH,c2 ( iN )}; or
P PUCCH,c2 ( i )=α×( P PUCCH,c2 ( i 1)+ P PUCCH,c2 ( i 2)+ . . . + P PUCCH,c2 ( iN )); and
P PUSCH,c2 (i) represents a PUSCH power indicator on the N second subframes, and satisfies one of the following conditions:
P PUSCH,c2 ( i )=max{ P PUSCH,c2 ( i 1), P PUSCH,c2 ( i 2), . . . , P PUSCH,c2 ( iN )};
P PUSCH,c2 ( i )=min{ P PUSCH,c2 ( i 1), P PUSCH,c2 ( i 2), . . . , P PUSCH,c2 ( iN )}; or
P PUSCH,c2 ( i )=α×( P PUSCH,c2 ( i 1)+ P PUSCH,c2 ( i 2)+ . . . + P PUSCH,c2 ( iN )), wherein
max represents using a maximum value, min represents using a minimum value, α is a power parameter, and the power parameter is preconfigured or the power parameter is pre-obtained by the UE from a base station.
11. The user equipment according to claim 10 , wherein the first subframe transmits a physical random access channel PRACH; and
the determining unit is specifically configured to:
if P req _ c1 (i)+P req _ c2 (i)>P MAX (i), use P req _ c1 (i) as a transmit power on the first subframe i, and use w c2,4 (ij)×P req _ c2 (ij) as a transmit power on a second subframe ij, so that P req _ c1 (i)+w c2,4 (ij)×P req _ c2 (i)≤P MAX (i), wherein 0≤w c2,4 (ij)<1.
12. The user equipment according to claim 10 , wherein the determining unit is specifically configured to:
if P req _ c1 (i)+P req _ c2 (i)≤P MAX (i), determine that a transmit power on the first subframe is P req _ c1 (i), and determine that transmit powers on the N second subframes are P req _ c2 (i);
if P req _ c1 (i)+P req _ c2 (i)>P MAX (i) and P req _ c1 (i)≤P c1 (i), determine that a transmit power on the first subframe is P req _ c1 (i), and determine that transmit powers on the N second subframes are P MAX (i)−P req _ c1 (i);
if P req _ c1 (i)+P req _ c2 (i)>P MAX (i) and P req _ c2 (i)≤max{P c2 (i1), . . . , P c2 (iN)}, determine that a transmit power on the first subframe is P MAX (i)−P req _ c2 (i), and determine that transmit powers on the N second subframes are P req _ c2 (i); and
if P req _ c1 (i)+P req _ c2 (i)>P MAX (i), P req _ c1 (i)>P c1 (i), and P req _ c2 (i)>max{P c2 (i1), . . . , P c2 (iN)}, determine that a transmit power on the first subframe is P c1 (i)+P alloc _ c1 (i), and determine that transmit powers on the N second subframes are P MAX (i)−P c1 (i)−P alloc _ c1 (i), wherein
if a priority of the first cell is higher than a priority of the second cell, P alloc _ c1 (i) meets that P alloc _ c1 (i)=min{P MAX (i)−max{P c2 (i1), . . . , P c2 (iN)}−P c1 (i), P req _ c1 (i)−P c1 (i)};
if a priority of the second cell is higher than a priority of the first cell, P alloc _ c1 meets that P alloc _ c1 (i)=min{P MAX (i)−P c1 (i)−min{P MAX (i)−P c1 (i), P req _ c2 (i)}, P req _ c1 (i)−P c1 (i)};
if a priority of the first cell is the same as a priority of the second cell, P alloc _ c1 (i) meets that P alloc _ c1 (i)=β×(P MAX (i)−P c1 (i)−max{P c2 (i1), . . . , P c2 (iN)); or
P alloc _ c1 (i) meets that
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wherein
P c1 (i) and P c2 (ij) are respectively a minimum guaranteed power on the first subframe i of the first cell and a minimum guaranteed power on a second subframe ij of the second cell, β is a remaining power allocation parameter, and the remaining power allocation parameter is preconfigured or the remaining power allocation parameter is pre-obtained by the UE from the base station.
13. The user equipment according to claim 9 , wherein if at least one second subframe of the N second subframes transmits a physical uplink control channel PUCCH and/or a physical uplink shared channel PUSCH, P req _ c2 (ij)=P PUCCH,c2 (ij)+P PUSCH,c2 (ij); and
the second calculation unit is specifically configured to:
denote the power indicator as P req _ c2 (i), and calculate the power indicator by using one of the following formula:
P req _ c2 ( i )=max{ P req _ c2 ( i 1), P req _ c2 ( i 2), . . . , P req _ c2 ( iN )};
P req _ c2 ( i )=min{ P req _ c2 ( i 1), P req _ c2 ( i 2), . . . , P req _ c2 ( iN )}; or
P req _ c2 ( i )=α×( P req _ c2 ( i 1)+ P req _ c2 ( i 2)+ . . . + P req _ c2 ( iN )), wherein
max represents using a maximum value, min represents using a minimum value, α is a power parameter, and the power parameter is preconfigured or the power parameter is pre-obtained by the UE from a base station.
14. A user equipment (UE) configured to determine power, wherein the UE is configured with multiple cells, a first subframe of a first cell corresponds to N second subframes of a second cell, and the UE comprises:
a first calculation unit, configured to calculate a first power requirement on the first subframe of the first cell, and calculate N second power requirements on the N second subframes of the second cell; and
a determining unit, configured to determine a transmit power on the first subframe and transmit powers on the N second subframes according to a magnitude relationship between the first power requirement, the N second power requirements, and a maximum transmit power of the UE and with reference to priority information of the first cell and the second cell, wherein
the first subframe is denoted as a subframe i, the N second subframes are denoted as subframes i1, i2, . . . , and iN, the first power requirement is denoted as P req _ c1 (i), the second power requirement is denoted as P req _ c2 (ij), the maximum transmit power corresponding to the first subframe i is denoted as P MAX (i), N is a positive integer greater than 1, and a value range of j is 1 to N.
15. The user equipment according to claim 14 , wherein:
if sending of the first cell and sending of the second cell are not aligned, the determining unit is specifically configured to:
if a priority of the first cell is higher than a priority of the second cell, determine that a transmit power on a second subframe i1 sent before the first subframe i is min{P req _ c2 (i1), P c2 (i1)}, determine that the transmit power on the first subframe i is min{P MAX (i)−min{P req _ c2 (i1), P c2 (i1)}, P req _ c1 (i)}, and determine that a transmit power on a second subframe ik is min{P MAX (i)−min{P MAX (i)−min{P req _ c2 (i1), P c2 (i1)}, P req _ c1 (i)}, P req _ c2 (ik)}; and
if a priority of the second cell is higher than a priority of the first cell, determine that the transmit power on the first subframe i is min{P req _ c1 (i), P c1 (i)}, determine that a transmit power on a second subframe ik is min{P MAX (i)−min{P req _ c1 (i), P c1 (i)}, P req _ c2 (ik)}, and determine that a transmit power on a second subframe (i+1) 1 is min{P MAX (i+1)−P c1 (i+1), min{P MAX (i)−min{P req _ c1 (i), P c1 (i)}}, P req _ c2 ((i+1) 1)}, wherein
P c1 (i) and P c2 (ij) are respectively a minimum guaranteed power on the first subframe i of the first cell and a minimum guaranteed power on the second subframe ij of the second cell, and a value range of k is 2 to N.
16. The user equipment according to claim 14 , wherein the first subframe is denoted as the subframe i, and the N second subframes are denoted as the subframes i1, i2, . . . , and iN; and
the determining unit is specifically configured to:
determine that a transmit power on a second subframe ij is P′ c2 (ij), and determine that a transmit power on a symbol that is on the first subframe i and that corresponds to the second subframe ij is min{P c1 (i), P MAX (i)−P′ c2 (ij)}, wherein
P c1 (i) is a minimum guaranteed power on the first subframe i of the first cell.