UPLINK POWER CONTROL METHOD FOR MOBILE COMMUNICATION SYSTEM

• US 20110310987A1
• Filed: 06/16/2011
• Published: 12/22/2011
• Est. Priority Date: 06/16/2010
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Cho, Joon Young, Han, Jin Kyu, Yeon, Myung Hoon, LEE, Hyo Jin
• Granted Patent: US 8,838,161 B2
• Time in Patent Office: Days
• US Class Current: 375/259
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04W 52/04 TPC
• CPC Class Codes: H04W 52/08 Closed loop power control
• CPC Class Codes: H04W 52/10 Open loop power control
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/248 where transmission power control commands are generated based on a path parameter
• CPC Class Codes: H04W 52/267 taking into account the information rate
• CPC Class Codes: H04W 52/42 in systems with time, space, frequency or polarisation diversity

Abstract

A per-layer and per-antenna uplink power control method for MIMO transmission of PUSCH in a Long Term Evolution-Advanced (LTE-A) system is provided. A transmit power for a plurality of transmit antennas is calculated based on a power control parameter received in a downlink. Uplink data is transmitted through the plurality of transmit antennas by applying the transmit power to each of a plurality of codewords.

Claims

1. An uplink power control method of a terminal in a mobile communication system, comprising the steps of:

calculating a transmit power for a plurality of transmit antennas based on a power control parameter received in a downlink; and

transmitting uplink data through the plurality of transmit antennas by applying the transmit power to each of a plurality of codewords.

2. The uplink power control method of claim 1, wherein calculating the transmit power comprises:

computing a sum of data sizes corresponding to the plurality of codewords;

computing a total transmit power corresponding to the sum of data sizes; and

computing the transmit power by dividing the total transmit power into a number of the plurality of codewords.

3. The uplink power control method of claim 1, wherein calculating the transmit power comprises computing the transmit power according to spectral efficiencies of the plurality of codewords, wherein the spectral efficiencies are determined differently according to a number of the plurality of codewords.

4. The uplink power control method of claim 1, wherein calculating the transmit power comprises:

checking a characteristic of a receiver that processes the plurality of codewords to acquire the plurality of codewords from the power control parameter; and

computing the transmit power according to the characteristic of the receiver.

5. An uplink power control apparatus of a terminal in a mobile communication system, comprising:

a plurality of transmit antennas for transmitting uplink data;

a power controller that receives a power control parameter in a downlink and calculates a transmit power for the plurality of transmit antennas according to the power control parameter; and

a plurality of power amplifiers for applying the transmit power to each of a plurality of codewords to transmit the uplink data through the plurality of transmit antennas.

6. The uplink power control apparatus of claim 5, wherein the power controller computes a sum of data sizes corresponding to the plurality of codewords, computes a total transmit power corresponding to the sum of data sizes, and computes the transmit power by dividing the total transmit power into a number of the plurality of codewords.

7. The uplink power control apparatus of claim 5, wherein the power controller computes the transmit power according to spectral efficiencies of the plurality of codewords, and the spectral efficiencies are determined differently according to a number of the plurality of codewords.

8. The uplink power control apparatus of claim 5, wherein the power controller checks a characteristic of a receiver that processes the plurality of codewords to acquire the plurality of codewords from the power control parameter and computes the transmit power according to the characteristic of the receiver.

9. An uplink power control method of a base station in a mobile communication system, comprising the steps of:

transmitting a power control parameter configured for a terminal having a plurality of transmit antennas; and

receiving uplink data transmitted by the terminal through the plurality of transmit antennas by applying a transmit power calculated according to the power control parameter to each of a plurality of codewords.

10. The uplink power control method of claim 9, wherein the terminal computes a sum of data sizes corresponding to the plurality of codewords, a total transmit power corresponding to the sum of data sizes, and the transmit power by dividing the total transmit power into a number of the plurality of codewords.

11. The uplink power control method of claim 9, wherein the terminal computes the transmit power according to spectral efficiencies of the plurality of codewords, and the spectral efficiencies are determined differently according to a number of the plurality of codewords.

12. The uplink power control method of claim 9, wherein the terminal checks a characteristic of a receiver which processes the plurality of codewords to acquire the plurality of codewords from the power control parameter and computes the transmit power according to the characteristic of the receiver.

13. An uplink power control apparatus of a base station in a mobile communication system, comprising:

a configuration unit that configures a power control parameter for a terminal having a plurality of transmit antennas;

a transmitter that transmits the power control parameter in a downlink; and

a receiver that receives uplink data transmitted by the terminal through the plurality of transmit antennas by applying a transmit power calculated according to the power control parameter to each of a plurality of codewords.

14. The uplink power control apparatus of claim 13, wherein the terminal computes a sum of data sizes corresponding to the plurality of codewords, a total transmit power corresponding to the sum of data sizes, and the transmit power by dividing the total transmit power into a number of the plurality of codewords.

15. The uplink power control apparatus of claim 13, wherein the terminal computes the transmit power according to spectral efficiencies of the plurality of codewords, and the spectral efficiencies are determined differently according to a number of the plurality of codewords.

16. The uplink power control apparatus of claim 13, wherein the terminal checks a characteristic of a receiver which processes the plurality of codewords to acquire the plurality of codewords from the power control parameter, and computes the transmit power according to the characteristic of the receiver.