Method and Terminal Apparatus for Transmitting a Power Status Report in a Wireless Communication System

• US 20130230010A1
• Filed: 11/09/2011
• Published: 09/05/2013
• Est. Priority Date: 11/09/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Dongcheol, Lee, Wookbong, Cho, Hangyu, Choi, Jinsoo
• Granted Patent: US 9,100,922 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 52/04 TPC
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/16 Deriving transmission power values from another channel
• CPC Class Codes: H04W 52/18 TPC being performed according to specific parameters
• CPC Class Codes: H04W 52/24 using SIR [Signal to Interference Ratio] or other wireless path parameters
• CPC Class Codes: H04W 52/241 taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo

Abstract

Method of transmitting a power status report by a mobile station in a wireless communication system according to the present application comprises receiving at least one of an offset value of a data channel or an offset value of a control channel for an uplink power control from a base station; determining a base uplink transmit power level for at least one of the data channel or control channel based on at least one of the received offset value of the data channel or the received offset value of the control channel; and transmitting the determined base uplink transmit power level to the base station.

Claims

1. A method of transmitting a power status report by a mobile station in a wireless communication system, the method comprising:

receiving at least one of an offset value of a data channel or an offset value of a control channel for an uplink power control from a base station;

determining a base uplink transmit power level for at least one of the data channel or control channel based on at least one of the received offset value of the data channel or the received offset value of the control channel; and

transmitting the determined base uplink transmit power level to the base station.

2. The method according to claim 1, further comprising calculating a downlink signal to interference power ratio value using a downlink signal received from the base station.

3. The method according to claim 2, wherein the downlink signal to interference power ratio value calculated by the mobile station is transmitted with the base uplink transmit power level.

4. The method according to claim 1, wherein the determined base uplink transmit power level is a value corresponding to each carrier.

5. The method according to claim 2, wherein the calculated downlink signal to interference power ratio value is calculated per Fractional Frequency Reuse (FFR) partition index.

6. The method according to claim 1, wherein the offset value of the data channel and the offset value of the control channel used to determine the base uplink transmit power level is a value calculated by accumulating the offset value of the data channel and the offset value of the control channel received from the base station, respectively.

7. The method according to claim 6, wherein the base uplink transmit power level for the data channel and the base uplink transmit power level for the control channel are determined by Equation A and Equation B, respectively.

PSD(base)=L+NI+Offset_Data  

 

[Equation A]

PSD(base)=L+NI+Offset_control  

 

[Equation B]

where L is a current average downlink propagation loss estimated by the mobile station, NI is an average noise and interference level per subcarrier estimated by the base station, and Offset_Data and Offset_control are values to correct power offsets of the data channel and the control channel, respectively.

8. A mobile station for transmitting a power status report in a wireless communication system, the mobile station comprising:

a receiver configured to receive at least one of an offset value of a data channel or an offset value of a control channel for an uplink power control from a base station;

a processor configured to determine a base uplink transmit power level for at least one of the data channel or the control channel based on at least one of the received offset value of the data channel or the received offset value of the control channel; and

a transmitter configured to transmit the determined base uplink transmit power level to the base station.

9. The mobile station according to claim 8, wherein

the processor is further configured to calculate a downlink signal to interference power ratio value using a downlink signal received from the base station, and

the transmitter is further configured to transmit the downlink signal to interference power ratio value calculated by the processor with the base uplink transmit power level.

10. The mobile station according to claim 8, wherein the determined base uplink transmit power level is a value corresponding to each carrier.

11. The mobile station according to claim 9, wherein the calculated downlink signal to interference power ratio value is calculated per FFR partition index.

12. The mobile station according to claim 8, wherein the offset value of the data channel and the offset value of the control channel used to determine the base uplink transmit power level is a value calculated by accumulating the offset value of the data channel and the offset value of the control channel received from the base station, respectively.

13. The mobile station according to claim 12, wherein the processor is configured to determine the base uplink transmit power level for the data channel and the base uplink transmit power level for the control channel using Equation C and Equation D, respectively.

PSD(base)=L+NI+Offset_Data  

 

[Equation C]

PSD(base)=L+NI+Offset_control  

 

[Equation D]

where L is a current average downlink propagation loss estimated by the mobile station, NI is an average noise and interference level per subcarrier estimated by the base station, and Offset_Data and Offset_control are values to correct power offsets of the data channel and the control channel, respectively.

14. The mobile station according to claim 12, wherein the value calculated by accumulating the offset value of the data channel and the offset value of the control channel is an offset value accumulated when a power status report is triggered.