METHOD AND APPARATUS OF CONTROLLING TRANSMISSION POWER

• US 20110292826A1
• Filed: 01/11/2010
• Published: 12/01/2011
• Est. Priority Date: 04/22/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Jung Hoon, Seo, Dong Youn, Ahn, Joon Kui, Yang, Suck Chel
• Granted Patent: US 8,705,397 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• 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 52/248 where transmission power control commands are generated based on a path parameter
• CPC Class Codes: H04W 52/34 TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading

Abstract

A method of transmitting signals from a transmitter of a wireless communication system comprises determining each transmission power of a first signal and a second signal; if the difference Y in transmission power between the first signal and the second signal exceeds a predetermined value X, adjusting at least one of the transmission powers of the first signal or the second signal so as not to allow the difference in adjusted transmission power to exceed the predetermined value; and simultaneously transmitting the first signal and the second signal to a receiver using the adjusted transmission power.

Claims

1. A method of transmitting signals from a transmitter of a wireless communication system, the method comprising:

determining each transmission power of a first signal and a second signal;

if the difference Y in transmission power between the first signal and the second signal exceeds a predetermined value X, adjusting at least one of the transmission powers of the first signal or the second signal so as not to allow the difference in adjusted transmission power to exceed the predetermined value; and

simultaneously transmitting the first signal and the second signal to a receiver using the adjusted transmission power.

2. The method of claim 1, wherein the first signal and the second signal are respectively transmitted through one or more single carrier frequency division multiple access (SC-FDMA) symbols.

3. The method of claim 1, wherein the first signal and the second signal respectively include separate reference signals.

4. The method of claim 1, wherein the first signal and the second signal respectively include any one of a physical uplink shared channel (PUSCH) signal, a physical uplink control channel (PUCCH) signal, and a sounding reference signal (SRS).

5. The method of claim 1, wherein the transmission power of any one having the greater transmission power from the first signal and the second signal is adjusted to a sum of the transmission power of the other signal and the predetermined value.

6. The method of claim 1, wherein the transmission power of any one having the less transmission power from the first signal and the second signal is adjusted to a value obtained by subtracting the predetermined value from the transmission power of the other signal.

7. The method of claim 1, wherein the transmission power of any one having the greater transmission power from the first signal and the second signal is adjusted to decrease by ‘

a’ and

the transmission power of the other signal is adjusted to increase by ‘

Y-X-a’

, wherein ‘

a’

is a real number of 0 to Y-X.

8. A user equipment of a wireless communication system comprising:

a radio frequency (RF) unit configured to transmit and receive a radio signal to and from a base station;

a memory storing information transmitted to and received from the base station and parameters required for an operation of the user equipment; and

a processor connected with the RF unit and the memory, controlling the RF unit and the memory for the operation of the user equipment,

wherein the processor performs a method of transmitting a signal, the method including;

determining each transmission power of a first signal and a second signal;

if the difference Y in transmission power between the first signal and the second signal exceeds a predetermined value X, adjusting at least one of the transmission powers of the first signal or the second signal so as not to allow the difference in adjusted transmission power to exceed the predetermined value; and

simultaneously transmitting the first signal and the second signal to the base station using the adjusted transmission power.

9. The user equipment of claim 8, wherein the first signal and the second signal are respectively transmitted through one or more single carrier frequency division multiple access (SC-FDMA) symbols.

10. The user equipment of claim 8, wherein the first signal and the second signal respectively include separate reference signals.

11. The user equipment of claim 8, wherein the first signal and the second signal respectively include any one of a physical uplink shared channel (PUSCH) signal, a physical uplink control channel (PUCCH) signal, and a sounding reference signal (SRS).

12. The user equipment of claim 8, wherein the transmission power of any one having the greater transmission power from the first signal and the second signal is adjusted to a sum of the transmission power of the other signal and the predetermined value.

13. The user equipment of claim 8, wherein the transmission power of any one having the less transmission power from the first signal and the second signal is adjusted to a value obtained by subtracting the predetermined value from the transmission power of the other signal.

14. The user equipment of claim 8, wherein the transmission power of any one having the greater transmission power from the first signal and the second signal is adjusted to decrease by ‘

a’ and

the transmission power of the other signal is adjusted to increase by ‘

Y-X-a’

, wherein ‘

a’

is a real number of 0 to Y-X.