Forward link power control of multiple data streams transmitted to a mobile station using a common power control channel

• US 20060270443A1
• Filed: 08/03/2006
• Published: 11/30/2006
• Est. Priority Date: 04/08/1999
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Lundby, Stein A., Razoumov, Leonid
• Granted Patent: US 7,706,829 B2
• Time in Patent Office: Days
• US Class Current: 455/522
• CPC Class Codes: H04W 52/08 Closed loop power control
• CPC Class Codes: H04W 52/143 Downlink power control
• CPC Class Codes: H04W 52/20 using error rate
• CPC Class Codes: H04W 52/24 using SIR [Signal to Interference Ratio] or other wireless path parameters
• CPC Class Codes: H04W 52/248 where transmission power control commands are generated based on a path parameter
• CPC Class Codes: H04W 52/40 during macro-diversity or soft handoff
• CPC Class Codes: H04W 52/54 Signalisation aspects of the TPC commands, e.g. frame structure
• CPC Class Codes: H04W 52/58 Format of the TPC bits
• CPC Class Codes: H04W 52/60 using different transmission rates for TPC commands

Abstract

A method and apparatus for controlling transmit power levels of a plurality of different data streams transmitted from at least one base station to a mobile station in a mobile radio communication system is described. A stream of power control commands is formed at the mobile station in accordance with either the first or second received data stream. A power control signal is formed at the mobile station from the first stream of power control commands and transmitted to the base station.

Claims

1. A method for controlling transmit power level of at least two data streams, comprising:

determining a first stream of power control commands for controlling transmit power level of a first of the at least two data streams;

determining a second stream of power control commands for controlling transmit power level of a second of the at least two data streams;

multiplexing the first and second streams of power control commands to form a multiplexed stream of power control commands.

2. The method as recited in claim 1 further comprising:

transmitting the multiplexed stream of power control commands for controlling transmit power levels of the at least two data streams.

3. The method as recited in claim 1, wherein said multiplexing comprising:

multiplexing the first stream of power control commands at a first bit rate and the second stream of power control commands at a second bit rate in the multiplexed stream of power control commands.

4. The method as recited in claim 1, further comprising:

receiving at a receiving station the at least two data streams.

5. The method as recited in claim 4, wherein said determining the first stream of power control commands is based on a reception quality of said first of the at least two data streams.

6. The method as recited in claim 4, wherein said determining the second stream of power control commands is based on a reception quality of said second of the at least two data streams.

7. The method as recited in claim 1, further comprising:

receiving the multiplexed stream of power control commands;

de-multiplexing the first and second stream of power control commands from the received multiplexed streams.

8. The method as recited in claim 7, further comprising:

controlling transmit power level of the first and second data streams in accordance with, respectively, the de-multiplexed first and second streams of the power control commands.

9. The method as recited in claim 1 wherein the at least two data streams are associated with transmissions from at least two different transmitting stations.

10. A method for controlling transmit power level of at least two data streams, comprising:

receiving a multiplexed stream of power control commands;

de-multiplexing at least a first and second streams of power control commands from the received multiplexed stream;

controlling transmit power level of at least one of the first and second data streams, wherein said controlling is in accordance with a respective de-multiplexed first and second streams of the power control commands.

11. The method as recited in claim 10 wherein said de-multiplexing comprising:

de-multiplexing the first stream of power control commands at a first bit rate and the second stream of power control commands at a second bit rate from the multiplexed stream of power control commands.

12. An apparatus for controlling power level of at least two data streams, comprising:

a processor configured for determining a first stream of power control commands for controlling transmit power level of a first of the at least two data streams, determining a second stream of power control commands for controlling transmit power level of a second of the at least two data streams;

a multiplexer for multiplexing the first and second streams of power control commands to form a multiplexed stream of power control commands.

13. The apparatus as recited in claim 12 further comprising:

a transmitter for transmitting the multiplexed stream of power control commands for controlling transmit power levels of the at least two data streams.

14. The apparatus as recited in claim 12, wherein said multiplexer is configured for multiplexing the first stream of power control commands at a first bit rate and the second stream of power control commands at a second bit rate in the multiplexed stream of power control commands.

15. The apparatus as recited in claim 12, further comprising:

a receiver for receiving the at least two data streams.

16. The apparatus as recited in claim 15, wherein said processor is configured for determining the first stream of power control commands based on a reception quality of said first of the at least two data streams.

17. The apparatus as recited in claim 15, wherein said processor is configured for determining the second stream of power control commands based on a reception quality of said second of the at least two data streams.

18. The apparatus as recited in claim 12 wherein the at least two data streams are associated with transmissions from at least two different transmitting stations.

19. An apparatus for controlling transmit power level of at least two data streams, comprising:

a receiver for receiving a multiplexed stream of power control commands;

a de-multiplexer for de-multiplexing at least a first and second streams of power control commands from the received multiplexed stream;

a controller for controlling transmit power level of at least one of the first and second data streams in accordance with a respective de-multiplexed first and second streams of the power control commands.

20. The apparatus as recited in claim 19 wherein said de-multiplexer is configured for de-multiplexing the first stream of power control commands at a first bit rate and the second stream of power control commands at a second bit rate from the multiplexed stream of power control commands.