METHOD FOR CONTROLLING UPLINK TRANSMISSION POWER IN WIRELESS COMMUNICATION SYSTEM AND AN APPARATUS THEREFOR

• US 20110250912A1
• Filed: 01/25/2010
• Published: 10/13/2011
• Est. Priority Date: 02/04/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Cho, Han Gyu, Kim, Dong Cheol, Kwak, Jin Sam, Lee, Wook Bong
• Granted Patent: US 8,452,322 B2
• Time in Patent Office: Days
• US Class Current: 455/501
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/346 distributing total power among users or channels

Abstract

A method for setting uplink transmission power at a mobile station in a wireless communication system comprises the steps of: receiving information on the number of total streams received at a base station; and setting the uplink transmission power using the received number of total streams. In this case, the uplink transmission power is preferably a transmission power per stream (P_Tx—stream) obtained by applying the number of total streams to reference transmission power (P_Tx—ref).

Claims

1. A method for setting uplink transmission power at a mobile station in a wireless communication system, the method comprising the steps of:

receiving information on the number of total streams received at a base station; and

setting the uplink transmission power using the received number of total streams.

2. The method of claim 1, wherein the uplink transmission power is a transmission power per stream(P_Tx—

_stream) obtained by applying the number of total streams to reference transmission power(P<sub>Tx—

ref</sub>).

3. The method of claim 1, wherein the number of total streams received at the base station is larger than the number of streams which are transmitted from the mobile station.

4. The method of claim 2, wherein the step of setting the uplink transmission power comprises dividing the reference transmission power(P_Tx—

_ref) by the number of total streams

5. The method of claim 2, wherein the reference transmission power(P_Tx—

_ref) comprises target signal to interference and noise power ratio(SINR_Target).

6. The method of claim 5, wherein the transmission power per stream (P_Tx—

_stream) comprises target signal to interference and noise power ratio per stream (SINR<sub>Target—

stream</sub>).

7. The method of claim 6, wherein the SINR_Target—

_stream is

8. The method of claim 1, wherein the number of total streams is received through UL A-MAP IE(Uplink Advanced-MAP Information Element) of a superframe header.

9. A mobile station comprising:

receiving module for receiving information on the number of total streams'"'"' received at a base station; and

processor for setting uplink transmission power using the received number of total streams.

10. The mobile station of claim 9, wherein the uplink transmission power is a transmission power per stream(P_Tx—

_stream) obtained by applying the number of total streams to reference transmission power(P<sub>Tx—

ref</sub>).

11. The mobile station of claim 9, wherein the number of total streams received at the base station is larger than the number of streams which are transmitted from the mobile station.

12. The mobile station of claim 10, wherein the processor divides the reference transmission power(P_Tx—

_ref) by the number of total streams for obtaining the transmission power per stream(P<sub>Tx—

stream</sub>).

13. The mobile station of claim 10, wherein the reference transmission power(P_Tx—

_ref) comprises target signal to interference and noise power ratio (SINR_Target).

14. The mobile station of claim 13, wherein the) transmission power per stream (P_Tx—

_stream) comprises target signal to interference and noise power ratio per stream (SINR<sub>Target—

stream</sub>).

15. The mobile station of claim 14, wherein the SINR_Target—

_stream is

16. The mobile station of claim 9, wherein the number of total streams is received through UL A-MAP IE(Uplink Advanced-MAP Information Element) of a superframe header.