Method and apparatus for controlling reverse link data rate of a mobile station in a communication system with reverse link common rate control

• US 20050201280A1
• Filed: 05/24/2004
• Published: 09/15/2005
• Est. Priority Date: 09/30/2003
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Lundby, Stein A., Jain, Avinash, Bao, Gang
• Granted Patent: US 7,724,701 B2
• Time in Patent Office: Days
• US Class Current: 370/229
• CPC Class Codes: H04L 1/0002 by adapting the transmission rate
• CPC Class Codes: H04L 1/0007 by modifying the frame length
• CPC Class Codes: H04L 1/18 Automatic repetition systems, e.g. Van Duuren systems
• CPC Class Codes: H04W 52/267 taking into account the information rate

Abstract

An efficient use of communication resources is provided by determining a behavior for selecting the payload size (data rate) of a reverse link transmission from a mobile station to a base station. The mobile station may store a predetermined table including the ratio of the power levels of the traffic channel and pilot channel (TPR), where each entry corresponds to one or more specific sizes of data payload, and consequently a data rate for transmission in a predetermined time frame. The payload size is selected based on an authorized-TPR. The authorized-TPR and a target-TPR are adjusted in accordance with a value of common TPR commands received from the base station. A fast-ramp-up behavior for adjustments of the authorized-TPR is followed when the authorized-TPR is less than the target-TPR. The down TPR commands are ignored in the adjustments of the authorized-TPR to allow following a fast-ramp-up behavior.

Claims

1. A method for controlling data rate of reverse link communications in a communication system, comprising:

determining a target traffic to pilot channel power ratio (target-TPR);

determining whether to follow a fast-ramp-up behavior in adjusting a value of an authorized traffic to pilot channel power ratio (authorized-TPR) for said reverse link communications, wherein said authorized-TPR corresponds to at least a range of payload sizes and communication data rates for said reverse link communications.

2. The method as recited in claim 1 wherein said determining whether to follow said fast-ramp-up behavior of said authorized-TPR includes:

comparing said target-TPR to said authorized-TPR;

following said fast-ramp-up behavior when said determined authorized-TPR is less than said target-TPR.

3. The method as recited in claim 1 wherein said determining whether to follow said fast-ramp-up behavior of said authorized-TPR includes:

comparing said target-TPR to said authorized-TPR;

following said fast-ramp-up behavior when said determined authorized-TPR is less than said target-TPR by a threshold-TPR.

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

receiving a TPR command;

wherein said adjusting said authorized-TPR includes;

in a condition other than when said fast-ramp-up behavior is followed, said adjusting includes changing a value of said authorized-TPR up, down or hold in accordance with a value of said received TPR command;

in a condition when said fast-ramp up behavior is followed and said received TPR commands include at least one down TPR command, modifying said adjusting of said value of said authorized-TPR by excluding any adjustments in accordance with said least one down TPR command.

5. The method as recited in claim 1 wherein said adjusting of said value of said authorized-TPR occurs once in every ARQ instance in said reverse link communications.

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

adjusting a value of said target-TPR up, down or hold in accordance with a value of said received TPR command.

7. The method as recited in claim 6 -wherein said adjusting of said target-TPR occurs at every transmission time frame.

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

selecting a payload size from said range of payload sizes based on said authorized-TPR;

communicating in accordance with said selected payload size on said reverse link communications.

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

selecting a payload size from said range of payload sizes based on said authorized-TPR;

wherein said selected payload size is less than a maximum payload size in said range of payload sizes, further comprising;

resetting said authorized-TPR to a value corresponding to the authorized-TPR of said selected payload size;

wherein said adjusting said authorized-TPR is from said reset value following said resetting.

10. An apparatus for controlling data rate of reverse link communications in a communication system, comprising:

means for determining a target traffic to pilot channel power ratio (target-TPR);

means for determining whether to follow a fast-ramp-up behavior in a means for adjusting a value of an authorized traffic to pilot channel power ratio (authorized-TPR) for said reverse link communications, wherein said authorized-TPR corresponds to at least a range of payload sizes and communication data rates for said reverse link communications.

11. The apparatus as recited in claim 10 wherein said means for determining whether to follow said fast-ramp-up behavior of said authorized-TPR includes:

means for comparing said target-TPR to said authorized-TPR;

means for following said fast-ramp-up behavior when said determined authorized-TPR is less than said target-TPR.

12. The apparatus as recited in claim 10 wherein said means for determining whether to follow said fast-ramp-up behavior of said authorized-TPR includes:

means for comparing said target-TPR to said authorized-TPR;

means for following said fast-ramp-up behavior when said determined authorized-TPR is less than said target-TPR by a threshold-TPR.

13. The apparatus as recited in claim 10 further comprising:

a receiver for receiving a TPR command;

wherein said means for adjusting said authorized-TPR includes;

in a condition other than when said fast-ramp-up behavior is followed, said means for adjusting includes means for changing a value of said authorized-TPR up, down or hold in accordance with a value of said received TPR command;

in a condition when said fast-ramp up behavior is followed and said received TPR commands include at least one down TPR command, modifying said means for adjusting of said value of said authorized-TPR by allowing to exclude any adjustments in accordance with said least one down TPR command.

14. The apparatus as recited in claim 10 wherein said means for adjusting of said value of said authorized-TPR includes means for adjustments to occur once in every ARQ instance in said reverse link communications.

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

means for adjusting a value of said target-TPR-up, down or hold in accordance with a value of said received TPR command.

16. The apparatus as recited in claim 15 wherein said means for adjusting of said target-TPR includes means for adjustments to occur at every transmission time frame.

17. The apparatus as recited in claim 10 further comprising:

means for selecting a payload size from said range of payload sizes based on said authorized-TPR;

a transmitter for communicating in accordance with said selected payload size on said reverse link communications.

18. The apparatus as recited in claim 13, further comprising:

means for selecting a payload size from said range of payload sizes based on said authorized-TPR;

wherein said selected payload size is less than a maximum payload size in said range of payload sizes, further comprising;

means for resetting said authorized-TPR to a value corresponding to the authorized-TPR of said selected payload size;

wherein said means for adjusting said authorized-TPR includes means for continuing adjustments from said reset value following said resetting.