Method of efficiently reporting user equipment transmission power and apparatus thereof

• US 8,958,840 B2
• Filed: 02/21/2012
• Issued: 02/17/2015
• 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
• Primary Examiner(s): PHU, SANH D
• Application Number:
  US13/400,947
• Publication Number:
  US 20120214537A1
• Time in Patent Office: 1,092 Days
• Field of Search: 455/522, 455/67.11, 455/226.1, 455/63.1, 455/127.1, 370/318
• US Class Current: 455/522
• 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 transmitting or reporting a Power Headroom Report (PHR) of a User Equipment (UE) are provided. The method of transmitting the PHR of the UE in a mobile communication system includes configuring an extended PHR including an indicator corresponding to a variation factor of a maximum transmission power of the UE, and transmitting the extended PHR from the UE to a Base Station (BS). The BS may be notified of a maximum transmission power of the UE and a variation factor corresponding to the maximum transmission power in order to enable efficient scheduling.

Claims

1. A method of transmitting a power headroom port (PHR) of a User Equipment (UE) in a mobile communication system, the method comprising:

determining a maximum transmission power according to a parameter associated with power management;

generating an extended PHR including the determined maximum transmission power and an indicator indicating whether the UE applies power back-off due to power management; and

transmitting the extended PHR to a Base Station (BS),

wherein the indicator has a length of 1 bit, and

wherein the indicator has a bit value of 1 if the determined maximum transmission power is different from a maximum power transmission not applying power back-off due to power management.

2. The method of claim 1, wherein the parameter is a Power management-Maximum Power Reduction (P-MPR) parameter.

3. The method of claim 1, further comprising receiving control information from the BS before generating the extended PHR,

wherein the control information includes information corresponding to a configuration of the extended PHR, the control information being transmitted using a Media Access Control-MainConfig Information Element (MAC-MainConfig IE).

4. The method of claim 1, wherein the indicator has a bit value of 0 if the determined maximum transmission power is not different from a maximum power transmission not applying power back-off due to power management.

5. An apparatus for transmitting a Power Headroom Report (PHR) of a User Equipment (UE) in a mobile communication system, the apparatus comprising:

a controller configured to determine a maximum transmission power according to a parameter associated with power management, and to generate an extended PHR including the determined maximum transmission power and an indicator indicating whether the UE applies power back-off due to power management; and

a transceiver configured to transmit the extended PHR to a Base Station (BS),

wherein the indicator has a length of 1 bit, and

wherein the indicator has a bit value of 1 if the determined maximum transmission power is different from a maximum power transmission not applying power back-off due to power management.

6. The apparatus of claim 5, wherein the parameter is a Power management-Maximum Power Reduction (P-MPR) value.

7. The apparatus of claim 5, wherein the transceiver is configured to receive control information from the BS before configuring the extended PHR, and

wherein the control information includes information corresponding to a configuration of the extended PHR, the control information being transmitted using a Media Access Control-MainConfig Information Element (MAC-MainConfig IE).

8. The apparatus of claim 7, wherein the extended PHR further includes information regarding the determined maximum transmission power, and

wherein the determined maximum transmission power is determined by the UE according to a first parameter provided from the BS and a second parameter previously set by the UE.

9. The apparatus of claim 5, wherein the indicator has a bit value of 0 if the determined maximum transmission power is not different from a maximum power transmission not applying power back-off due to power management.

10. An apparatus for receiving a Power Headroom Report (PHR) of a Base Station (BS) in a mobile communication system, the apparatus comprising:

a controller configured to generate control information including information corresponding to a configuration of an extended PHR; and

a transceiver configured to transmit the control information and to receive the extended PHR from the UE,

wherein the extended PHR includes an indicator indicating whether a maximum transmission power of the UE determined according to a parameter associated with power management is different from a maximum power transmission not applying power back-off due to power management,

wherein the indicator has a length of 1 bit, and

wherein the indicator has a bit value of 1 if the determined maximum transmission power is different from the maximum power transmission corresponding to the UE not applying power back-off due to power management.

11. The apparatus of claim 10, wherein the parameter is a Power management-Maximum Power Reduction (P-MPR) value.

12. The apparatus of claim 10, wherein the control information is transmitted using a Media Access Control-MainConfig Information Element (MAC-MainConfig IE).

13. The apparatus of claim 12, wherein the extended PHR further includes information regarding the determined maximum transmission power, and

wherein the determined maximum transmission power is determined by the UE according to a first parameter provided from the BS and a second parameter previously set by the UE.

14. The apparatus of claim 10, wherein the indicator has a bit value of 0 if the determined maximum transmission power is not different from a maximum power transmission not applying power back-off due to power management.

15. A method of receiving a Power Headroom Report (PHR) at a Base Station (BS) in a mobile communication system, the method comprising:

transmitting control information including information corresponding to a configuration of an extended PHR to a User Equipment (UE); and

receiving the extended PHR from the UE,

wherein the extended PHR includes an indicator indicating whether a maximum transmission power of the UE determined according to a parameter associated with power management is different from a maximum power transmission not applying power back-off due to power management;

wherein the indicator has a length of 1 bit; and

wherein the indicator has a bit value of 1 if the determined maximum transmission power is different from the maximum power transmission corresponding to the UE not applying power back-off due to power management.

16. The method of claim 15, wherein the parameter is a Power management-Maximum Power Reduction (P-MPR) value.

17. The method of claim 15, wherein the control information is transmitted using a Media Access Control-MainConfig Information Element (MAC-MainConfig IE).

18. The method of claim 17, wherein the extended PHR further includes information regarding the determined maximum transmission power, and

wherein the determined maximum transmission power is determined by the UE according to a first parameter provided from the BS and a second parameter previously set by the UE.

19. The method of claim 15, wherein the indicator has a bit value of 0 if the determined maximum transmission power is not different from the maximum power transmission not applying power back-off due to power management.