Method and apparatus for efficient processing of data for transmission in a communication system

• US 20040102205A1
• Filed: 11/26/2002
• Published: 05/27/2004
• Est. Priority Date: 11/26/2002
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Kasturi, Nitin, Zhang, Yi, Vayanos, Alkinoos Hector, Rao, Subramanya P.N.
• Granted Patent: US 6,882,857 B2
• Time in Patent Office: Days
• US Class Current: 455/522
• CPC Class Codes: H04L 1/0001 Systems modifying transmission characteristics according to link quality, e.g. power backoff adaptive data allocation for multicarrier modulation H04L5/0044; controlling transmission power for radio systems H04W52/04
• CPC Class Codes: H04L 1/0019 in which mode-switching is based on a statistical approach
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 52/221 using past power control commands
• CPC Class Codes: H04W 52/26 using transmission rate or quality of service QoS [Quality of Service]
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 52/50 at the moment of starting communication in a multiple access environment
• CPC Class Codes: H04W 52/58 Format of the TPC bits
• CPC Class Codes: H04W 52/60 using different transmission rates for TPC commands
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]

Abstract

Various embodiments are provided for determining a set of acceptable transport format combinations for transmission on a current time frame. A set of acceptable modified rate power adjustment values is determined based on a maximum power level, an accumulated power commands and an initial power control command. A set of acceptable channel gain factors is determined based on the set of acceptable modified rate power adjustments values, and the set of acceptable transport format combinations is determined based on the set of acceptable channel gain factors. A possible set of modified rate power adjustment values is associated to a set of channel gain factors for determining the set of acceptable channel gain factors based on various design of a transmitter chain used for transmission of data from the mobile station.

Claims

1. A method for determining a set of acceptable transport format combinations for transmission on a current time frame, comprising:

determining a maximum power level allowed for transmission from a mobile station;

determining an accumulated power up/down commands associated with a preceding time frame;

determining an initial power control command;

determining a set of acceptable modified rate power adjustment values based on said maximum power level, said accumulated power commands and said initial power control command;

determining a set of acceptable channel gain factors based on said set of acceptable modified rate power adjustments values;

determining said set of acceptable transport format combinations based on said set of acceptable channel gain factors.

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

associating a possible set of modified rate power adjustment values to a set of channel gain factors for said determining said set of acceptable channel gain factors.

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

receiving said initial power control command from a base station in a communication system.

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

receiving said maximum power level from a base station in a communication system.

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

determining said channel gain factors at said mobile station based on a set of received channel gain factors.

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

receiving said channel gain factors at said mobile station from a base station.

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

determining a set of possible transport combinations for said determining of said set of acceptable transport format combinations.

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

selecting one of said acceptable transport format combinations for transmission of data on said current time frame.

9. The method as recited in claim 1 wherein each transport format combinations of said set of acceptable transport format combinations includes a set of transport formats corresponding to a set of transport channels for communications from said mobile station.

10. The method as recited in claim 9 wherein said transport channels are mapped to a set of physical channels for transmission from said mobile station in accordance with a determined power level and data rate over a set of time slots in said current time frame.

11. An apparatus for determining a set of acceptable transport format combinations for transmission on a current time frame, comprising:

means for determining a maximum power level allowed for transmission from a mobile station;

means for determining an accumulated power up/down commands associated with a preceding time frame;

means for determining an initial power control command;

means for determining a set of acceptable modified rate power adjustment values based on said maximum power level, said accumulated power commands and said initial power control command;

means for determining a set of acceptable channel gain factors based on said set of acceptable modified rate power adjustments values;

means for determining said set of acceptable transport format combinations based on said set of acceptable channel gain factors.

12. The apparatus as recited in claim 11 further comprising:

means for associating a possible set of modified rate power adjustment values to a set of channel gain factors for said determining said set of acceptable channel gain factors.

13. The apparatus as recited in claim 11 further comprising:

means for receiving said initial power control command from a base station in a communication system.

14. The apparatus as recited in claim 11 further comprising:

means for receiving said maximum power level from a base station in a communication system.

15. The apparatus as recited in claim 11 further comprising:

means for determining said channel gain factors at said mobile station based on a set of received channel gain factors.

16. The apparatus as recited in claim 11 further comprising:

means for receiving said channel gain factors at said mobile station from a base station.

17. The apparatus as recited in claim 11 further comprising:

means for determining a set of possible transport combinations for said determining of said set of acceptable transport format combinations.

18. The apparatus as recited in claim 11 further comprising:

means for selecting one of said acceptable transport format combinations for transmission of data on said current time frame.

19. The apparatus as recited in claim 11 wherein each transport format combinations of said set of acceptable transport format combinations includes a set of transport formats corresponding to a set of transport channels for communications from said mobile station.

20. The apparatus as recited in claim 19 wherein said transport channels are mapped to a set of physical channels for transmission from said mobile station in accordance with a determined power level and data rate over a set of time slots in said current time frame.