# US 2019/0174433 A1 · Configuring Dual Connectivity Maximum Transmit Power

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- Number: US 2019/0174433 A1
- Document ID: US20190174433A1
- Status: Published application
- Kind: A1
- Application number: 16/204,286
- Filed: 2018-11-29
- Published: 2019-06-06
- Earliest claimed: 2017-12-01
- Assignees: Telefonaktiebolaget LM Ericsson (publ)
- Applicants: Telefonaktiebolaget LM Ericsson (publ)
- Inventors: Ravikiran NORY; Christian BERGLJUNG; Daniel LARSSON
- Web page: https://patentgrep.com/patent/US20190174433A1

## CPC

- H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range}
- G06F 9/45558: {Hypervisor-specific management and integration aspects}
- H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)}
- H04L 25/0226: {sounding signals per se}
- H04W 52/146: {Uplink power control}
- H04W 74/0833: Random access procedures, e.g. with 4-step access
- H04W 76/15: Setup of multiple wireless link connections
- G06F 2009/45595: {Network integration; Enabling network access in virtual machine instances}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## 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

### Claim 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_cmax_1 determined based on one or more transmissions of the first RAT;
determining a second configured maximum transmit power value (P_cmax2) for transmitting in a second RAT, the P_cmax2 determined based on transmissions of both the first RAT and the second RAT;
performing a transmission in the first RAT at a power less than or equal to the P_cmax1; and
performing a transmission in the second RAT at a power less than or equal to the P_cmax2.

### Claim 2 (depends on 1)

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 transmissions of the first RAT.

### Claim 3

(canceled)

### Claim 4 (depends on 1)

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 both the first RAT and the second RAT.

### Claim 5 (depends on 1)

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

### Claim at position 6

6-7. (canceled)

### Claim 8 (depends on 1)

The method of claim 1, wherein:
performing the transmission in the first RAT comprises transmitting a physical channel or signal of the first RAT, wherein the physical channel or signal of the first RAT is one of a Physical Uplink Shared Channel (PUSCH), a Physical Uplink Control Channel (PUCCH), a Sounding Reference Signal (SRS), and a Physical Random Access Chanel (PRACH); and
performing the transmission in the second RAT comprises transmitting a physical channel or signal of the second RAT, wherein the physical channel or signal of the second RAT is one of a PUSCH, a PUCCH, a PRACH, and an SRS.

### Claim 9

(canceled)

### Claim 10 (depends on 1)

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).

### Claim 11 (depends on 10)

The method of claim 10, 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_cmax 1;
the MPR1; and/or
the BO1.

### Claim 12 (depends on 10)

The method of claim 10, 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.

### Claim 13 (depends on 11)

The method of claim 11, 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 transmissions scheduled for both the first RAT and the second RAT.

### Claim 14

(canceled)

### Claim 16 (depends on 1)

The method of claim 1, wherein the powers of the transmission performed in the first RAT and the transmission performed in the second RAT are both bounded based on the P_cmax2.

### Claim 17 (depends on 1)

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 transmissions of the first RAT.

### Claim 18

(canceled)

### Claim 19 (depends on 1)

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 both the first RAT and the second RAT.

### Claim at position 18

20-21. (canceled)

### Claim 22

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 based on one or more transmissions of the first RAT;
determine a second configured maximum transmit power value (P_cmax2) for transmitting in a second RAT, the P_cmax2 determined based on transmissions of both the first RAT and the second RAT;
perform a transmission in the first RAT at a power less than or equal to the P_cmax1; and
perform a transmission in the second RAT at a power less than or equal to the P_cmax2.

### Claim 23 (depends on 22)

The wireless device of claim 22, 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 transmissions of the first RAT.

### Claim 24

(canceled)

### Claim 25 (depends on 22)

The wireless device of claim 22, 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 both the first RAT and the second RAT.

### Claim 26 (depends on 22)

The wireless device of claim 22, wherein the P_cmax2 is determined based at least in part on a transmission power of current transmissions on the first RAT.

### Claim at position 24

27-28. (canceled)

### Claim 29 (depends on 22)

The wireless device of claim 22, wherein:
performing the transmission in the first RAT comprises transmitting a physical channel or signal of the first RAT, wherein the physical channel or signal of the first RAT is one of a Physical Uplink Shared Channel (PUSCH), a Physical Uplink Control Channel (PUCCH), a Sounding Reference Signal (SRS), and a Physical Random Access Chanel (PRACH); and
performing the transmission in the second RAT comprises transmitting a physical channel or signal of the second RAT, wherein the physical channel or signal of the second RAT is one of a PUSCH, a PUCCH, a PRACH, and an SRS.

### Claim 30

(canceled)

### Claim 31 (depends on 22)

The wireless device of claim 22, 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).

### Claim 32 (depends on 31)

The wireless device of claim 31, 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.

### Claim 33 (depends on 31)

The wireless device of claim 31, 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.

### Claim 34 (depends on 32)

The wireless device of claim 32, 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 transmissions scheduled for both the first RAT and the second RAT.

### Claim 35

(canceled)

### Claim 37 (depends on 22)

The wireless device of claim 22, wherein the powers of the transmission performed in the first RAT and the transmission performed in the second RAT are both bounded based on the P_cmax2.

### Claim 38 (depends on 22)

The wireless device of claim 22, 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 transmissions of the first RAT.

### Claim 39

(canceled)

### Claim 40 (depends on 22)

The wireless device of claim 22, 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 both the first RAT and the second RAT.

### Claim at position 36

41-42. (canceled)

### Claim 43

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 based on one or more transmissions of 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 based transmissions of both the first RAT and the second RAT;
program code for performing a transmission in the first RAT at a power less than or equal to the P_cmax1; and
program code for performing a transmission in the second RAT at a power less than or equal to the P_cmax2.

### Claim at position 38

44-69. (canceled)