Configuring dual connectivity maximum transmit power

• US 10,694,475 B2
• Filed: 11/29/2018
• Issued: 06/23/2020
• Est. Priority Date: 12/01/2017
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Nory, Ravikiran, Bergljung, Christian, Larsson, Daniel
• Primary Examiner(s): Rachedine, Mohammed
• Application Number:
  US16/204,286
• Publication Number:
  US 20190174433A1
• Time in Patent Office: 572 Days
• Field of Search: None
• CPC Class Codes: G06F 2009/45595 Network integration; Enabling network access in virtual machine instances
• CPC Class Codes: G06F 9/45558 Hypervisor-specific management and integration aspects
• CPC Class Codes: H04L 25/0226 sounding signals per se
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 76/15 Setup of multiple wireless link connections

Abstract

A method is performed by a wireless device. The method comprises determining a first configured maximum transmit power value (P_cmax1) for transmitting in a first radio access technology (RAT). The P_cmax1 is determined based on one or more transmissions of the first RAT. The method further comprises determining a second configured maximum transmit power value (P_cmax2) for transmitting in a second RAT. The P_cmax2 is determined based on transmissions of both the first RAT and the second RAT. The method further comprises performing a transmission in the first RAT at a power less than or equal to the P_cmax1. The method further comprises performing a transmission in the second RAT at a power less than or equal to the P_cmax2.

Claims

1. A method performed by a wireless device, the method comprising:

determining a first configured maximum transmit power value (P_cmax1) for transmitting in a first radio access technology (RAT), the P_cmax1 determined by the wireless device based on one or more physical channel or physical signal transmissions scheduled for transmission by the wireless device via the first RAT;

determining a second configured maximum transmit power value (P_cmax2) for transmitting in a second RAT, the P_cmax2 determined by the wireless device based on transmissions of the wireless device via the first RAT in a time duration and one or more physical channel or physical signal transmissions scheduled for transmission by the wireless device via the second RAT in the same time duration;

transmitting via the first RAT at a power less than or equal to the P_cmax1; and

transmitting via the second RAT at a power less than or equal to the P_cmax2.

2. The method of claim 1, wherein the P_cmax1 is further based on at least a first maximum power reduction value (MPR1), wherein the MPR1 is determined based on a number of resource blocks allocated for the one or more physical channel or physical signal transmissions scheduled for transmission via the first RAT.

3. The method of claim 1, wherein the P_cmax2 is further based on at least a second maximum power reduction value (MPR2), wherein the MPR2 is determined based on a number of resource blocks allocated for the transmissions of the wireless device via the first RAT in the time duration and the one or more physical channel or physical signal transmissions scheduled for transmission via the second RAT in the same time duration.

4. The method of claim 1, wherein the P_cmax2 is determined based at least in part on a transmission power of the transmissions on the first RAT in the time duration.

5. The method of claim 1, wherein:

the one or more physical channel or physical signal transmissions scheduled for transmission by the wireless device via the first RAT are one of a Physical Uplink Shared Channel (PUSCH), a Physical Uplink Control Channel (PUCCH), a Sounding Reference Signal (SRS), and a Physical Random Access Channel (PRACH) of the first RAT; and

the one or more physical channel or physical signal transmissions scheduled for transmission by the wireless device via the second RAT are one of a PUSCH, a PUCCH, an SRS, or a PRACH of the second RAT.

6. The method of claim 1, wherein the P_cmax1 is determined based on one or more of the following:

a power class value that the wireless device indicates to the network as part of wireless device capability signaling (P_powerclass);

a maximum allowed power value for the first radio access technology (P_RAT1);

a first maximum power reduction value (MPR1); and

/or

a first backoff value (BO1).

7. The method of claim 6, wherein the P_cmax2 is determined based on one or more of the following:

the P_powerclass;

a maximum allowed power value for the second radio access technology (P_RAT2);

a second maximum power reduction value (MPR2);

a second backoff value (BO2);

the P_cmax1;

the MPR1; and

/or

the BO1.

8. The method of claim 7, wherein the P_cmax2 is determined based at least in part on the MPR2 and/or the BO2, and the MPR2 and/or the BO2 are determined by the wireless device by considering the transmissions of the wireless device via the first RAT in the time duration and the one or more physical channel or physical signal transmissions scheduled for transmission by the wireless device via the second RAT in the same time duration.

9. The method of claim 6, wherein the P_cmax1 is determined based at least in part on the MPR1 and/or the BO1, and the MPR1 and/or the BO1 are determined by the wireless device based on the second RAT having no scheduled transmissions regardless of whether the wireless device is scheduled to transmit on the second RAT.

10. The method of claim 1, wherein the powers for transmitting via the first RAT and for transmitting via the second RAT are both bounded based on the P_cmax2.

11. The method of claim 1, wherein the P_cmax1 is further based on at least a first maximum power reduction value (MPR1), wherein the MPR1 is determined based on a number of resource blocks and positions of the resource blocks allocated for the one or more physical channel or physical signal transmissions scheduled for transmission via the first RAT.

12. The method of claim 1, wherein the P_cmax2 is further based on at least a second maximum power reduction value (MPR2), wherein the MPR2 is determined based on a number of resource blocks and positions of the resource blocks allocated for the transmissions of the first RAT in the time duration and the one or more physical channel or physical signal transmissions scheduled for transmission via the second RAT in the same time duration.

13. A wireless device comprising:

a memory configured to store instructions; and

processing circuitry configured to execute the instructions;

wherein the wireless device is configured to;

determine a first configured maximum transmit power value (P_cmax1) for transmitting in a first radio access technology (RAT), the P_cmax1 determined by the wireless device based on one or more physical channel or physical signal transmissions scheduled for transmission by the wireless device via the first RAT;

determine a second configured maximum transmit power value (P_cmax2) for transmitting in a second RAT, the P_cmax2 determined by the wireless device based on transmissions of the wireless device via the first RAT in a time duration and one or more physical channel or physical signal transmissions scheduled for transmission by the wireless device via the second RAT in the same time duration;

transmit via the first RAT at a power less than or equal to the P_cmax1; and

transmit via the second RAT at a power less than or equal to the P_cmax2.

14. The wireless device of claim 13, wherein the P_cmax1 is further based on at least a first maximum power reduction value (MPR1), wherein the MPR1 is determined based on a number of resource blocks allocated for the one or more physical channel or physical signal transmissions scheduled for transmission via the first RAT.

15. The wireless device of claim 13, wherein the P_cmax2 is further based on at least a second maximum power reduction value (MPR2), wherein MPR2 is determined based on the number of resource blocks allocated for the transmissions of the wireless device via the first RAT in the time duration and the one or more physical channel or physical signal transmissions scheduled for transmission via the second RAT in the same time duration.

16. The wireless device of claim 13, wherein the P_cmax2 is determined based at least in part on a transmission power of the transmissions on the first RAT in the time duration.

17. The wireless device of claim 13, wherein:

the one or more physical channel or physical signal transmissions scheduled for transmission by the wireless device via the first RAT are one of a Physical Uplink Shared Channel (PUSCH), a Physical Uplink Control Channel (PUCCH), a Sounding Reference Signal (SRS), and a Physical Random Access Channel (PRACH) of the first RAT; and

the one or more physical channel or physical signal transmissions scheduled for transmission by the wireless device via the second RAT are one of a PUSCH, a PUCCH, an SRS, or a PRACH of the second RAT.

18. The wireless device of claim 13, wherein the P_cmax1 is determined based on one or more of the following:

a power class value that the wireless device indicates to the network as part of wireless device capability signaling (P_powerclass);

a maximum allowed power value for the first radio access technology (P_RAT1);

a first maximum power reduction value (MPR1); and

/or

a first backoff value (BO1).

19. The wireless device of claim 18, wherein the P_cmax2 is determined based on one or more of the following:

the P_powerclass;

a maximum allowed power value for the second radio access technology (P_RAT2);

a second maximum power reduction value (MPR2);

a second backoff value (BO2);

the P_cmax1;

the MPR1; and

/or

the BO1.

20. The wireless device of claim 18, wherein the P_cmax1 is determined based at least in part on the MPR1 and/or the BO1, and the MPR1 and/or the BO1 are determined by the wireless device based on the second RAT having no scheduled transmissions regardless of whether the wireless device is scheduled to transmit on the second RAT.

21. The wireless device of claim 19, wherein the P_cmax2 is determined based at least in part on the MPR2 and/or the BO2, and the MPR2 and/or the BO2 are determined by the wireless device by considering the transmissions of the wireless device via the first RAT in the time duration and the one or more physical channel or physical signal transmissions scheduled for transmission by the wireless device via the second RAT in the same time duration.

22. The wireless device of claim 13, wherein the powers for transmitting via the first RAT and for transmitting via the second RAT are both bounded based on the P_cmax2.

23. The wireless device of claim 13, wherein the P_cmax1 is further based on at least a first maximum power reduction value (MPR1), wherein the MPR1 is determined based on a number of resource blocks and positions of the resource blocks allocated for the one or more physical channel or physical signal transmissions scheduled for transmission via the first RAT.

24. The wireless device of claim 13, wherein the P_cmax2 is further based on at least a second maximum power reduction value (MPR2), wherein the MPR2 is determined based on a number of resource blocks and positions of the resource blocks allocated for the transmissions of the first RAT in the time duration and the one or more physical channel or physical signal transmissions scheduled for transmission via the second RAT in the same time duration.

25. The wireless device of claim 13, wherein the wireless device is further configured to determine the P_cmax1 without considering transmissions of the wireless device via the second RAT.

26. The wireless device of claim 13, wherein the transmissions of the wireless device via the first RAT in the time duration that the P_cmax2 is determined based on are the same as the one or more physical channel or physical signal transmissions scheduled for transmission by the wireless device via the first RAT that the P_cmax1 is determined based on.

27. The wireless device of claim 13, wherein:

to determine the P_cmax1 comprises the wireless device configured to determine a lower bound for P_cmax1 and an upper bound for P_cmax1, and to use a value within the lower bound for P_cmax1 and the upper bound for P_cmax1; and

to determine the P_cmax2 comprises the wireless device configured to determine a lower bound for P_cmax2 and an upper bound for P_cmax2, and to use a value within the lower bound for P_cmax2 and the upper bound for P_cmax2.

28. A computer program product comprising a non-transitory computer readable medium storing computer readable program code, the computer readable program code comprises:

program code for determining a first configured maximum transmit power value (P_cmax1) for transmitting in a first radio access technology (RAT), the P_cmax1 determined by a wireless device based on one or more physical channel or physical signal transmissions scheduled for transmission by the wireless device via the first RAT;

program code for determining a second configured maximum transmit power value (P_cmax2) for transmitting in a second RAT, the P_cmax2 determined by the wireless device based on transmissions of the wireless device via the first RAT in a time duration and one or more physical channel or physical signal transmissions scheduled for transmission by the wireless device via the second RAT in the same time duration;

program code for transmitting via the first RAT at a power less than or equal to the P_cmax1; and

program code for transmitting via the second RAT at a power less than or equal to the P_cmax2.