Enhanced-transport format combination power margin for uplink

1. A method that selects an Enhanced Transport Format Combination (E-TFC) for High-Speed Uplink Packet Access in a third generation (3G) wireless communications for a mobile device, the method comprising:

using a channel prediction to estimate a power margin of a one or more dedicated channels;

predicting a power margin for an acknowledgement transmission based on transmission parameters;

reserving a power margin for a channel quality indicator (CQI) transmission; and

determining an E-TFC for an uplink data packet transmission based on an available power margin.

2. The method of claim 1 , where the transmission parameters comprise a past transmission indicator, a service type, a CQI report, or a time since a last transmission.

3. The method of claim 1 further comprising determining the available power margin by P MAX -P CHANNEL -P CQI -P ACK , where P MAX is a maximum transmission power for a mobile device, P CHANNEL is a predicted power needed to compensate for channel variation, P CQI is a reserved power for a CQI transmission, and P ACK is a predicted power needed for the acknowledgement transmission.

4. The method of claim 1 , further comprising reserving a fixed margin for transmitting the channel quality indicator (CQI).

5. The method of claim 2 , where reserving the fixed margin comprises reserving the fixed margin based on a scheduled CQI reporting.

6. The method of claim 5 , wherein the predicted channel value of the next transmission interval comprises a value H(n) and wherein generating the predicted channel includes generating the predicted channel according to the relation:

H

⁡

(

n

)

=

∑

i

=

1

L

-

1

⁢

w

i

⁡

(

n

)

×

H

⁡

(

n

-

i

)

,

where w i includes a weight for an interval i and H(n) is a channel value at a time index n.

7. The method of claim 1 , further comprising using one or more past power control reports to generate a predicted value of the channel in a next transmission interval.

8. The method of claim 7 , further comprising receiving the one or more past power control reports from a base station.

9. The communications device of claim 8 , where the transmission parameters comprise a past transmission indicator, a service type, a CQI report, or a time since a last transmission.

10. The communications device of claim 8 , where the mobile unit is further operable to reserve a fixed margin for transmitting the channel quality indicator (CQI).

11. The communications device of claim 10 , where the mobile unit is further operable to use one or more past power control reports to generate a predicted value of the channel in a next transmission interval.

12. The communications device of claim 10 where the mobile unit is further operable to determine an available power margin by P MAX -P CHANNEL -P CQI -P ACK , where P MAX is a maximum transmission power for the mobile unit, P CHANNEL is a predicted power needed to compensate for channel variation, P CQI is a reserved power for a CQI transmission, and P ACK is a predicted power needed for the acknowledgement transmission.

13. The communications device of claim 12 , where the mobile unit is further operable to receive the one or more past power control reports from a base station.

14. The communications device of claim 10 , where the mobile unit is further operable to reserve the fixed margin by reserving the fixed margin based on a scheduled CQI reporting.

15. The communications device of claim 14 , wherein the predicted channel value of the next transmission interval comprises a value H(n) and wherein the mobile unit is configurable to generate the predicted channel according to the relation:

H

⁡

(

n

)

=

∑

i

=

1

L

-

1

⁢

w

i

⁡

(

n

)

×

H

⁡

(

n

-

i

)

,

where w i includes a weight for an interval i, and H(n) is a channel value at a time index n.

16. A communications device for enhanced uplink of High-Speed Uplink Packet Access (HSUPA) of 3G wireless communications, the communications device comprising:

a mobile unit comprising a receiver and a transmitter, where the mobile unit is operable to:

use a channel prediction to estimate a power margin of a one or more dedicated channels;

predict a power margin for an acknowledgement transmission based on transmission parameters;

reserve a power margin for a channel quality indicator (CQI) transmission; and

determine an Enhanced Transport Format Combination (E-TFC) for an uplink data packet transmission based on an available power margin.

17. A communications network for enhanced uplink of High-Speed Uplink Packet Access (HSUPA) in third generation (3G) wireless communications, the communications network comprising:

a mobile transceiver unit, where the mobile transceiver unit is operable to:

use a channel prediction to estimate a power margin of a one or more dedicated channels;

predict a power margin for an acknowledgement transmission based on transmission parameters;

reserve a power margin for a channel quality indicator (CQI) transmission; and

determine an Enhanced Transport Format Combination (E-TFC) for an uplink data packet transmission based on an available power margin; and

a communications network node operable to transmit a power control signal to the mobile transceiver unit.

18. The communications network of claim 17 where the mobile transceiver unit is further operable to reserve a fixed margin for transmitting the channel quality indicator (CQI).

19. The communications network of claim 17 where the transmission parameters comprise a past transmission indicator, a service type, a CQI report, or a time since a last transmission.

20. The communications network of claim 17 , where the mobile transceiver unit is further operable to determine an available power margin by P MAX -P CHANNEL -P CQI -P ACK , where P MAX is a maximum transmission power for a mobile device, P CHANNEL is a predicted power needed to compensate for channel variation, P CQI is a reserved power for a CQI transmission, and P ACK is a predicted power needed for the acknowledgement transmission.

21. The communications network of claim 18 , where the mobile transceiver unit is further operable to use one or more past power control reports to generate a predicted value of the channel in a next transmission interval.

22. The communications network of claim 21 , where mobile transceiver unit is further operable to receive the one or more past power control reports from a base station.

23. A method that transmits data for enhanced uplink of High Speed Downlink Packet Access in third generation (3G) wireless communications for a communications network, the method comprising:

using a channel prediction to estimate a power requirement of a one or more dedicated channels and maintain a power margin for Enhanced Transport Format Combination (E-TFC) selection;

using a channel prediction to estimate a power margin of a one or more dedicated channels;

predicting a power margin for an acknowledgement transmission based on transmission parameters;

reserving a power margin for a channel quality indicator (CQI) transmission;

determining an E-TFC for an uplink data packet transmission based on an available power margin;

transmitting a data signal from a mobile unit based on the determined E-TFC; and

transmitting a power control signal from a network node based on the data signal.

24. The method of claim 23 , further comprising reserving a fixed margin for transmitting the channel quality indicator (CQI).

25. The method of claim 23 , where the transmission parameters comprise a past transmission indicator, a service type, a CQI report, or a time since a last transmission.

26. The method of claim 23 , further comprising using one or more past power control reports to generate a predicted value of the channel in a next transmission interval.

27. The method of claim 23 further comprising determining an available power margin by P MAX -P CHANNEL -P CQI -P ACK , where P MAX is a maximum transmission power for a mobile device, P CHANNEL is a predicted power needed to compensate for channel variation, P CQI is a reserved power for a CQI transmission, and P ACK is a predicted power needed for the acknowledgement transmission.

28. The method of claim 26 , further comprising receiving the one or more past power control reports from a base station.

29. The method of claim 24 , where reserving the fixed margin comprises reserving the fixed margin based on a scheduled CQI reporting.