Method of efficiently reporting user equipment transmission power and apparatus thereof

Patent metadata

Field	Value
Publication number	US-10638432-B2
Application number	US-201816230023-A
Country	US
Kind code	B2
Filing date	Dec 21, 2018
Priority date	Feb 21, 2011
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

A method and an apparatus for efficiently reporting user equipment (UE) are provided. A method of transmitting Power Headroom Report (PHR) of UE in a mobile communication system, includes configuring an evolved PHR including an indicator with respect of a variation factor of maximum transmission power of the UE, and transmitting the evolved PHR to an eNB. An eNB may know maximum transmission power of an UE and a variation factor thereof to enable efficient scheduling.

First claim

What is claimed is:

1. A method performed by a base station in a wireless communication system, the method comprising:
transmitting configuration information associated with a power headroom report (PHR) to a terminal in the wireless communication system; and
receiving a PHR from the terminal,
wherein the PHR does not include information on a maximum transmission power for a first activated serving cell in case that an uplink grant for the first activated serving cell is not received by the terminal,
wherein the PHR includes and a maximum transmission power for a second activated serving cell in case that an uplink grant for the second activated serving cell is received by the terminal, and
wherein the PHR is triggered at the terminal, in case that a PHR prohibit timer expires and a power backoff due to power management is changed by more than a threshold.

2. The method of claim 1 ,
wherein the PHR further includes information indicating whether the terminal applies the power backoff due to power management, in case that the PHR is associated with a multiple serving cells, and
wherein the information indicating whether the terminal applies the power backoff is set to 1 in case that a first maximum transmission power included in the PHR is different from a second maximum transmission power to be determined in case that no power backoff due to power management is applied.

3. The method of claim 2 , wherein the PHR does not include the information indicating whether the terminal applies the power backoff in case that the PHR is associated with a single serving cell.

4. The method of claim 1 , wherein a lower bound of the maximum transmission power is determined based on power management.

5. The method of claim 1 , wherein the PHR is triggered in case that the terminal has an uplink resource for a new transmission, the PHR prohibit timer expires and the power backoff due to power management is changed by more than the threshold since a last transmission of a PHR when an uplink resource was allocated.

6. A base station in a wireless communication system, the base station comprising:
a transceiver; and
a controller configured to:
transmit, via the transceiver, configuration information associated with a power headroom report (PHR) to a terminal in the wireless communication system, and
receive, via the transceiver, a PHR from the terminal,

wherein the PHR does not include a maximum transmission power for a first activated serving cell if an uplink grant for the first activated serving cell is not received by the terminal,
wherein the PHR includes a maximum transmission power for a second activated serving cell if an uplink grant for the second activated serving cell is received by the terminal, and
wherein the PHR is triggered at the terminal, if a PHR prohibit timer expires and a power backoff due to power management is changed by more than a threshold.

7. The base station of claim 6 ,
wherein the PHR further includes information indicating whether the terminal applies the power backoff due to power management, if the PHR is associated with multiple serving cells, and
wherein the information indicating whether the terminal applies the power backoff is set to 1 if a first maximum transmission power included in the PHR is different from a second maximum transmission power to be determined if no power backoff due to power management is applied.

8. The base station of claim 7 , wherein the PHR does not include the information indicating whether the terminal applies the power backoff if the PHR is associated with a single serving cell.

9. The base station of claim 6 , wherein a lower bound of the maximum transmission power is determined based on power management.

10. The base station of claim 6 , wherein the PHR is triggered if the terminal has an uplink resource for a new transmission, the PHR prohibit timer expires and the power backoff due to power management is changed by more than the threshold since a last transmission of a PHR when an uplink resource was allocated.

11. A method performed by a terminal in a wireless communication system, the method comprising:
receiving configuration information associated with a power headroom report (PHR) from a base station in the wireless communication system;
identifying whether a PHR is triggered; and
transmitting the PHR to the base station in case that the PHR is triggered,
wherein the PHR does not include a maximum transmission power for a first activated serving cell in case that an uplink grant for the first activated serving cell is not received by the terminal,
wherein the PHR includes a maximum transmission power for a second activated serving cell in case that an uplink grant for the second activated serving cell is received by the terminal, and
wherein the PHR is triggered in case that a PHR prohibit timer expires and a power backoff due to power management is changed by more than a threshold.

12. The method of claim 11 ,
wherein the PHR further includes information indicating whether the terminal applies the power backoff due to power management, in case that the PHR is associated with multiple serving cells, and
wherein the information indicating whether the terminal applies the power backoff is set to 1 in case that a first maximum transmission power included in the PHR is different from a second maximum transmission power to be determined in case that no power backoff due to power management is applied.

13. The method of claim 12 , wherein the PHR does not include the information indicating whether the terminal applies the power backoff in case that the PHR is associated with a single serving cell.

14. The method of claim 11 , wherein a lower bound of the maximum transmission power is determined based on power management.

15. The method of claim 11 , wherein the PHR is triggered in case that the terminal has an uplink resource for a new transmission, the PHR prohibit timer expires and the power backoff due to power management is changed by more than the threshold since a last transmission of a PHR when an uplink resource was allocated.

16. A terminal in a wireless communication system, the terminal comprising:
a transceiver; and
a controller configured to:
receive, via the transceiver, configuration information associated with a power headroom report (PHR) from a base station in the wireless communication system,
identify whether a PHR is triggered, and
transmit, via the transceiver, the PHR to the base station if the PHR is triggered,

wherein the PHR does not include a maximum transmission power for a first activated serving cell if an uplink grant for the first activated serving cell is not received by the terminal,
wherein the PHR includes a maximum transmission power for a second activated serving cell if an uplink grant for the second activated serving cell is received by the terminal, and
wherein the PHR is triggered if a PHR prohibit timer expires and a power backoff due to power management is changed by more than a threshold.

17. The terminal of claim 16 ,
wherein the PHR further includes information indicating whether the terminal applies the power backoff due to power management, if the PHR is associated with multiple serving cells, and
wherein the information indicating whether the terminal applies the power backoff is set to 1 if a first maximum transmission power included in the PHR is different from a second maximum transmission power to be determined if no power backoff due to power management is applied.

18. The terminal of claim 17 , wherein the

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Sang Bum
• Kim Soeng Hun
• Van Lieshout Gert-Jan
• Jeong Kyeong In

Classifications

• H04W52/545

  modifying TPC bits in special situations · CPC title

• H04W52/365 Primary

  Power headroom reporting · CPC title

• H04W88/06

  adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals · CPC title

• H04W52/228

  using past power values or information · CPC title

• H04W88/08

  Access point devices · CPC title