METHOD OF EFFICIENTLY REPORTING USER EQUIPMENT TRANSMISSION POWER AND APPARATUS THEREOF

• US 20190124607A1
• Filed: 12/21/2018
• Published: 04/25/2019
• Est. Priority Date: 02/21/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KIM, Sang Bum, KIM, Soeng Hun, VAN LIESHOUT, Gert-Jan, JEONG, Kyeong In
• Granted Patent: US 10,638,432 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 52/228 using past power values or information
• CPC Class Codes: H04W 52/365 Power headroom reporting
• CPC Class Codes: H04W 52/545 modifying TPC bits in special situations
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: H04W 88/08 Access point devices
• CPC Class Codes: Y02D 30/70 in wireless communication networks

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.

Claims

1. A method 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; and

receiving 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 allocated,

wherein the PHR includes and a maximum transmission power for a second activated serving cell if an uplink grant for the second activated serving cell is allocated, and

wherein the PHR is triggered at the terminal, if a prohibit PHR timer expires and a power backoff due to the power management is changed more than a threshold.

2. The method of claim 1,

wherein the PHR includes an indicator including whether the terminal applies the power backoff due to power management, if the PHR is associated with a multiple serving cells, and

wherein the indicator 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 the power management is applied.

3. The method of claim 2, wherein the PHR does not include the indicator if 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 if an uplink resource for a new transmission is allocated, the prohibit PHR timer expires and the power backoff due to power management is changed more than the threshold since last transmission of a PHR when uplink resource was allocated.

6. A base station in a wireless communication system, the base station comprising:

a transceiver configured to transmit and receive a signal; and

a controller configured to;

transmit configuration information associated with a power headroom report (PHR) to a terminal, and

receive 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 allocated,

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 allocated, and

wherein the PHR is triggered at the terminal, if a prohibit PHR timer expires and a power backoff due to the power management is changed more than a threshold.

7. The base station of claim 6,

wherein the PHR includes an indicator including whether the terminal applies the power backoff due to power management, if the PHR is associated with multiple serving cells, and

wherein the indicator 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 the power management is applied.

8. The base station of claim 7, wherein the PHR does not include the indicator 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 an uplink resource for a new transmission is allocated, the prohibit PHR timer expires and the power backoff due to power management is changed more than the threshold since last transmission of a PHR when uplink resource was allocated.

11. A method 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;

identifying whether a PHR is triggered; and

transmitting 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 allocated,

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 allocated, and

wherein the PHR is triggered if a prohibit PHR timer expires and a power backoff due to the power management is changed more than a threshold.

12. The method of claim 11,

wherein the PHR includes an indicator including whether the terminal applies the power backoff due to power management, if the PHR is associated with multiple serving cells, and

wherein the indicator 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 the power management is applied.

13. The method of claim 12, wherein the PHR does not include the indicator if 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 if an uplink resource for a new transmission is allocated, the prohibit PHR timer expires and the power backoff due to power management is changed more than the threshold since last transmission of a PHR when uplink resource was allocated.

16. A terminal in a wireless communication system, the terminal comprising:

a transceiver configured to transmit and receive a signal; and

a controller configured to;

receive configuration information associated with a power headroom report (PHR) from a base station,

identify whether a PHR is triggered, and

transmit 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 allocated,

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 allocated, and

wherein the PHR is triggered if a prohibit PHR timer expires and a power backoff due to the power management is changed more than a threshold.

17. The terminal of claim 16,

wherein the PHR includes an indicator including whether the terminal applies the power backoff due to power management, if the PHR is associated with multiple serving cells, and

wherein the indicator 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 the power management is applied.

18. The terminal of claim 17, wherein the PHR does not include the indicator if the PHR is associated with a single serving cell.

19. The terminal of claim 16, wherein a lower bound of the maximum transmission power is determined based on power management.

20. The terminal of claim 16, wherein the PHR is triggered if an uplink resource for a new transmission is allocated, the prohibit PHR timer expires and the power backoff due to power management is changed more than the threshold since last transmission of a PHR when uplink resource was allocated.