Method for controlling uplink transmission power in wireless communication system and an apparatus therefor

• US 8,452,322 B2
• Filed: 01/25/2010
• Issued: 05/28/2013
• Est. Priority Date: 02/04/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Dong Cheol, Cho, Han Gyu, Kwak, Jin Sam, Lee, Wook Bong
• Primary Examiner(s): Lee, John J
• Application Number:
  US13/139,702
• Publication Number:
  US 20110250912A1
• Time in Patent Office: 1,219 Days
• Field of Search: 455/522, 455/69, 455/452.1, 455/452.2, 455/509, 455/67.11, 455/67.13, 455/126, 455/63.1, 455/500, 455/501, 455/507, 370/329
• US Class Current: 455/522
• 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:

receiving, from a base station, information on a number of total streams; and

setting the uplink transmission power using the number of total streams,

wherein the uplink transmission power is transmission power per stream obtained by applying the number of total streams to a reference transmission power.

2. The method of claim 1, wherein the number of total streams is larger than a number of streams that are transmitted from the mobile station.

3. The method of claim 1, wherein setting the transmission power per stream comprises dividing the reference transmission power by the number of total streams.

4. The method of claim 1, wherein the reference transmission power comprises a target signal to interference and noise power ratio.

5. The method of claim 4, wherein the transmission power per stream comprises a target signal to interference and noise power ratio per stream.

6. The method of claim 5, wherein the target signal to interference and noise power ratio per stream (SINR_Target—

_stream) is

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

14. The mobile station of claim 7, wherein the number of total streams is received through an UL A-MAP IE (Uplink Advanced-MAP Information Element) of a superframe header.

8. A mobile station comprising:

a receiving module for receiving, from a base station, information on a number of total streams; and

a processor for setting uplink transmission power using the number of total streams,

wherein the uplink transmission power is transmission power per stream obtained by applying the number of total streams to a reference transmission power.

9. The mobile station of claim 8, wherein the number of total streams is larger than a number of streams that are transmitted from the mobile station.

10. The mobile station of claim 8, wherein the processor divides the reference transmission power by the number of total streams for obtaining the transmission power per stream.

11. The mobile station of claim 8, wherein the reference transmission power comprises a target signal to interference and noise power ratio.

12. The mobile station of claim 11, wherein the transmission power per stream comprises a target signal to interference and noise power ratio per stream.

13. The mobile station of claim 12, wherein the target signal to interference and noise power ratio (SINR_Target—

_stream) is