Power control method and apparatus

1. A method, comprising:

receiving, by a device, a first power value and a second power value, wherein the first power value is a maximum allowed transmit power value that is configured by a network side for the device to use to communicate with a first cell group, and the second power value is a maximum allowed transmit power value that is configured by the network side for the device to use to communicate with a second cell group, and the first power value and the second power value are separately received by the device; and

determining, by the device based on the first power value, a first guaranteed power value for the device to use when communicating with the first cell group; and

determining, by the device based on the second power value, a second guaranteed power value for the device to use when communicating with the second cell group; and

determining, by the device based on a sum of the first guaranteed power value and the second guaranteed power value, a total guaranteed power value for the device to use when a resource in the first cell group overlaps a resource in the second cell group, wherein the first guaranteed power value, satisfies a relation as follows:

P CMAX_LTE_L,c ≤P CMAX_LTE,c ≤P CMAX_LTE_H,c , wherein

P CMAX_LTE_L,c =MIN{ P EMAX,c −T c,c ,( P powerclass_LTE −ΔP powerclass_LTE )−MAX(MPR c +A− MPR c +ΔT IB,c +ΔT c,c +ΔT ProSe ,p −MPR c ), P _ LTE−ΔT c,c },

P CMAX_LTE_H,c =MIN{ P EMAX,c ,P powerclass_LTE −ΔP powerclass_LTE ,P_LTE},

P CMAX_LTE,c represents a configured power of the device in a long term evolution (LTE) cell, P CMAX_LTE_L,c represents a lower limit of P CMAX_LTE,c , and P CMAX_LTE_H,c represents an upper limit of P CMAX_LTE,c , P EMAX,c represents a maximum allowed transmit power value configured by the network side, P powerclass_LTE represents a maximum allowed transmit power value that is usable in an LTE cell group, ΔP powerclass_LTE represents a power adjustment value of the device at a power class, MPRc represents a maximum power reduction value, A−MPR c represents an additional power reduction value, p−MPR c represents a power reduction value, ΔT IB,c represents a transmit power relaxation in consideration of carrier aggregation, ΔT c,c represents a transmit power relaxation at a band edge, ΔT ProSe represents a transmit power relaxation in LTE corresponding to a proximity communications service, and P_LTE represents the first power value.

2. The method according to claim 1 , wherein the device is operable in a dual connectivity mode, and in the dual connectivity mode the device establishes a connection to the first cell group and the second cell group at the same time.

3. The method according to claim 1 , wherein the first cell group comprises one or more LTE cells, and the second cell group comprises one or more new radio (NR) cells.

4. The method according to claim 1 , wherein a time at which a subframe in the first cell group overlaps a subframe in the second cell group is a first time unit, the first time unit corresponds to a subframe p in the first cell group and corresponds to slots q to q+n in the second cell group, and a value of n indicates a time domain position of a last slot that is in the second cell group and that overlaps the subframe p in the first cell group, and the method further comprises:

determining, by the device, an actual total guaranteed power value based on n+1 total guaranteed power values corresponding to the slots q to q+n, wherein the actual total guaranteed power value is a maximum allowed transmit power value that is usable by the device in the first time unit.

5. An apparatus, wherein the apparatus comprises:

a transceiver, configured to receive a first power value and a second power value, wherein the first power value is a maximum allowed transmit power value that is configured by a network side for a device to use to communicate with a first cell group, and the second power value is a maximum allowed transmit power value that is configured by the network side for the device to use to communicate with a second cell group, and wherein the first power value and the second power value are separately received; and

a processor, configured to:

determine, based on the first power value, a first guaranteed power value for the device to use when communicating with the first cell group; and

determine, based on the second power value, a second guaranteed power value for the device to use when communicating with the second cell group; and

determine, based on a sum of the first guaranteed power value and the second guaranteed power value, a total guaranteed power value for the device to use when a resource in the first cell group overlaps a resource in the second cell group, wherein the first guaranteed power value, satisfies a relation as follows:

P CMAX_LTE_L,c ≤P CMAX_LTE,c ≤P CMAX_LTE_H,c , wherein

P CMAX_LTE_L,c =MIN{ P EMAX,c −T c,c ,( P powerclass_LTE −ΔP powerclass_LTE )−MAX(MPR c +A− MPR c +ΔT IB,c +ΔT c,c +ΔT ProSe ,p −MPR c ), P _ LTE−ΔT c,c },

P CMAX_LTE_H,c =MIN{ P EMAX,c ,P powerclass_LTE −ΔP powerclass_LTE ,P_LTE},

P CMAX_LTE,c represents a configured power of the device in a long term evolution (LTE) cell, P CMAX_LTE_L,c represents a lower limit of P CMAX_LTE,c , and P CMAX_LTE_H,c represents an upper limit of P CMAX_LTE,c , P EMAX,c represents a maximum allowed transmit power value configured by the network side, P powerclass_LTE represents a maximum allowed transmit power value that is usable in an LTE cell group, ΔP powerclass_LTE represents a power adjustment value of the device at a power class, MPRc represents a maximum power reduction value, A−MPR c represents an additional power reduction value, p−MPR c represents a power reduction value, ΔT IB,c represents a transmit power relaxation in consideration of carrier aggregation, ΔT c,c represents a transmit power relaxation at a band edge, ΔT ProSe represents a transmit power relaxation in LTE corresponding to a proximity communications service, and P_LTE represents the first power value.

6. The apparatus according to claim 5 , wherein the device is operable in a dual connectivity mode, and in the dual connectivity mode the device establishes a connection to the first cell group and the second cell group at a same time.

7. The apparatus according to claim 5 , wherein the first cell group comprises one or more LTE cells, and the second cell group comprises one or more new radio (NR) cells.

8. The apparatus according to claim 5 , wherein a time at which a subframe in the first cell group overlaps a subframe in the second cell group is a first time unit, the first time unit corresponds to a subframe p in the first cell group and corresponds to slots q to q+n in the second cell group, and a value of n indicates a time domain position of a last slot that is in the second cell group and that overlaps the subframe p in the first cell group; and

the processor is configured to determine an actual total guaranteed power value based on n+1 total guaranteed power values corresponding to the slots q to q+n, wherein the actual total guaranteed power value is a maximum allowed transmit power value that is usable by the device in the first time unit.

9. A non-transitory storage medium, configure to store program instructions, wherein, when the program instructions are executed by a computer, the instructions cause a device to:

receive a first power value and a second power value, wherein the first power value is a maximum allowed transmit power value that is configured by a network side for the device to use to communicate with a first cell group, and the second power value is a maximum allowed transmit power value that is configured by the network side for the device to use to communicate with a second cell group, and wherein the first power value and the second power value are separately received; and

determine, based on the first power value, a first guaranteed power value for the device to use when communicating with the first cell group; and

determine, based on the second power value, a second guaranteed power value for the device to use when communicating with the second cell group; and

determine, based on a sum of the first guaranteed power value and the second guaranteed power value, a total guaranteed power value for the device to use when a resource in the first cell group overlaps a resource in the second cell group, wherein the first guaranteed power value satisfies a relation as follows:

P CMAX_LTE_L,c ≤P CMAX_LTE,c ≤P CMAX_LTE_H,c , wherein

P CMAX_LTE_L,c =MIN{ P EMAX,c −T c,c ,( P powerclass_LTE −ΔP powerclass_LTE )−MAX(MPR c +A− MPR c +ΔT IB,c +ΔT c,c +ΔT ProSe ,p −MPR c ), P _ LTE−ΔT c,c },

P CMAX_LTE_H,c =MIN{ P EMAX,c ,P powerclass_LTE −ΔP powerclass_LTE ,P_LTE},

P CMAX_LTE,c represents a configured power of the device in a long term evolution (LTE) cell, P CMAX_LTE_L,c represents a lower limit of P CMAX_LTE,c , and P CMAX_LTE_H,c represents an upper limit of P CMAX_LTE,c , P EMAX,c represents a maximum allowed transmit power value configured by the network side, P powerclass_LTE represents a maximum allowed transmit power value that is usable in an LTE cell group, ΔP powerclass_LTE represents a power adjustment value of the device at a power class, MPRc represents a maximum power reduction value, A−MPR c represents an additional power reduction value, p−MPR c represents a power reduction value, ΔT IB,c represents a transmit power relaxation in consideration of carrier aggregation, ΔT c,c represents a transmit power relaxation at a band edge, ΔT ProSe represents a transmit power relaxation in LTE corresponding to a proximity communications service, and P_LTE represents the first power value.

10. The non-transitory storage medium according to claim 9 , wherein the device is operable in a dual connectivity mode, and in the dual connectivity mode the device establishes a connection to the first cell group and the second cell group at a same time.

11. The non-transitory storage medium according to claim 9 , wherein the first cell group comprises one or more LTE cells, and the second cell group comprises one or more new radio (NR) cells.

12. The non-transitory storage medium according to claim 9 , wherein a time at which a subframe in the first cell group overlaps a subframe in the second cell group is a first time unit, the first time unit corresponds to a subframe p in the first cell group and corresponds to slots q to q+n in the second cell group, and a value of n indicates a time domain position of a last slot that is in the second cell group and that overlaps the subframe p in the first cell group, and the instructions further cause the device to:

determine an actual total guaranteed power value based on n+1 total guaranteed power values corresponding to the slots q to q+n, wherein the actual total guaranteed power value is a maximum allowed transmit power value that is usable by the device in the first time unit.

13. The non-transitory storage medium according to claim 9 , wherein the first cell group and the second cell group operate using different scheduling granularities.

14. The non-transitory storage medium according to claim 9 , wherein the first cell group and the second cell group operate using different communication protocols.

15. The method according to claim 1 , wherein the second guaranteed power value satisfies a relation as follows:

P CMAX_L,ƒ,c ≤P CMAX_NR,ƒ,c ≤P CMAX_H,ƒ,c , wherein

P CMAX_L,ƒ,c =MIN{ P EMAX,c −Δ,( P powerclass_NR −ΔP powerclass_NR )−MAX(MPR c +A −MPR c +ΔT IB,c +ΔT c,c ,P −MPR c ), P _ NR−ΔT c,c }

P CMAX_H,ƒ,c =MIN{ P EMAX,c ,P powerclass_NR −ΔP powerclass_NR ,P_NR }, and wherein

P CMAX_NR,ƒ,c represents a configured power of the device on a specific uplink carrier in a new radio (NR) cell, P CMAX_L,ƒ,c represents a lower limit of P CMAX_NR,ƒ,c and P CMAX_H,ƒ,c represents an upper limit of P CMAX_NR,ƒ,c , P powerclass_NR represents a maximum allowed transmit power value that is usable by the device in a NR cell group, MPRc represents a maximum power reduction value, A−MPR c represents an additional power reduction value, p−MPR c represents a power reduction value, ΔT IB,c represents a transmit power relaxation in consideration of carrier aggregation and dual connectivity, ΔT c,c represents a transmit power relaxation at a band edge, and P_NR represents the first power value.

16. The apparatus according to claim 5 , wherein the second guaranteed power value satisfies a relation as follows:

P CMAX_L,ƒ,c ≤P CMAX_NR,ƒ,c ≤P CMAX_H,ƒ,c , wherein

P CMAX_L,ƒ,c =MIN{ P EMAX,c −Δ,( P powerclass_NR −ΔP powerclass_NR )−MAX(MPR c +A −MPR c +ΔT IB,c +ΔT c,c ,P −MPR c ), P _ NR−ΔT c,c }

P CMAX_H,ƒ,c =MIN{ P EMAX,c ,P powerclass_NR −ΔP powerclass_NR ,P_NR }, and wherein

P CMAX_NR,ƒ,c represents a configured power of the device on a specific uplink carrier in a new radio (NR) cell, P CMAX_L,ƒ,c represents a lower limit of P CMAX_NR,ƒ,c and P CMAX_H,ƒ,c represents an upper limit of P CMAX_NR,ƒ,c , P powerclass_NR represents a maximum allowed transmit power value that is usable by the device in a NR cell group, MPRc represents a maximum power reduction value, A−MPR c represents an additional power reduction value, p−MPR c represents a power reduction value, ΔT IB,c represents a transmit power relaxation in consideration of carrier aggregation and dual connectivity, ΔT c,c represents a transmit power relaxation at a band edge, and P_NR represents the first power value.

17. The non-transitory storage medium according to claim 9 , wherein the second guaranteed power value satisfies a relation as follows:

P CMAX_L,ƒ,c ≤P CMAX_NR,ƒ,c ≤P CMAX_H,ƒ,c , wherein

P CMAX_L,ƒ,c =MIN{ P EMAX,c −Δ,( P powerclass_NR −ΔP powerclass_NR )−MAX(MPR c +A −MPR c +ΔT IB,c +ΔT c,c ,P −MPR c ), P _ NR−ΔT c,c }

P CMAX_H,ƒ,c =MIN{ P EMAX,c ,P powerclass_NR −ΔP powerclass_NR ,P_NR }, and wherein

P CMAX_NR,ƒ,c represents a configured power of the device on a specific uplink carrier in a new radio (NR) cell, P CMAX_L,ƒ,c represents a lower limit of P CMAX_NR,ƒ,c and P CMAX_H,ƒ,c represents an upper limit of P CMAX_NR,ƒ,c , P powerclass_NR represents a maximum allowed transmit power value that is usable by the device in a NR cell group, MPRc represents a maximum power reduction value, A−MPR c represents an additional power reduction value, p−MPR c represents a power reduction value, ΔT IB,c represents a transmit power relaxation in consideration of carrier aggregation and dual connectivity, ΔT c,c represents a transmit power relaxation at a band edge, and P_NR represents the first power value.