METHOD AND APPARATUS FOR UPLINK RATE SELECTION IN THE PRESENCE OF MULTIPLE TRANSPORT CHANNELS IN A WIRELESS COMMUNICATION SYSTEM

• US 20070091852A1
• Filed: 11/27/2006
• Published: 04/26/2007
• Est. Priority Date: 08/20/2003
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Willenegger, Serge, Malladi, Durga
• Granted Patent: US 7,881,333 B2
• Time in Patent Office: Days
• US Class Current: 370/332
• CPC Class Codes: H04L 1/0002 by adapting the transmission rate
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04W 52/16 Deriving transmission power values from another channel
• CPC Class Codes: H04W 52/228 using past power values or information
• CPC Class Codes: H04W 52/267 taking into account the information rate

Abstract

Systems and methods for selecting data rates at which to transmit data over a primary uplink in the presence of one or more secondary uplink channels. One embodiment comprises a method including determining probabilities associated with numbers of attempted transmissions of data, determining the number of times pending data transmissions have been attempted, determining probabilities associated with the data transmissions, and allocating power for transmission of the data in a succeeding frame based upon the associated probabilities. In one embodiment, a highest supportable data rate for a primary uplink is initially selected. Then, power is allocated for a minimum set of channels on the primary uplink. Then, power is allocated for pending data transmissions on the secondary uplink. A maximum power level for the transceiver is then adjusted to account for the allocated power, and the highest supportable data rate for the primary uplink is recomputed.

Claims

1. In a wireless communication system configured to retransmit pending data until the data is acknowledged or until a maximum number of retransmissions are made, a method comprising:

determining probability values associated with numbers of attempted transmissions of data; and

for each of a plurality of pending data transmissions,

determining a number of times transmission of the data transmission has been attempted on a secondary channel in one or more preceding frames,

determining a probability associated with the number of times the data transmission has been attempted, and

allocating power for the data transmission on the secondary channel in a succeeding frame based upon the probability associated with the number of times the data transmission has been attempted.

2. The method of claim 1, further comprising allocating power for data transmissions on a primary channel.

3. The method of claim 2, wherein the power for data transmissions on the primary channel is allocated prior to allocating power for the data transmission on the secondary channel in the succeeding frame.

4. The method of claim 3, wherein the power allocated for data transmissions on the primary channel is allocated for a minimum set of data.

5. The method of claim 2, further comprising selecting a data rate for data transmissions on the primary channel.

6. The method of claim 5, wherein selecting the data rate for transmission of data on the primary channel comprises selecting a highest supported data rate that is no greater than a maximum data rate specified by a base station.

7. The method of claim 6, further comprising determining which of a plurality of data rates are supported based on information corresponding to a set of preceding frames.

8. An apparatus comprising:

a transceiver configured to communicate data via a wireless communication link;

wherein the transceiver is configured to retransmit pending data on a secondary channel until the data is acknowledged or until a maximum number of retransmissions are made, and wherein the transceiver is further configured to

determine probability values associated with one or more numbers of attempted data transmissions; and

for each of a plurality of pending data transmissions,

determine a number of times the data transmission has been attempted in one or more preceding frames,

determine a probability associated with the number of times the data transmission has been attempted, and

allocate power for the data transmission in a succeeding frame based upon the probability associated with the number of times the data transmission has been attempted.

9. The apparatus of claim 8, wherein the transceiver is further configured to allocate power for transmission of data on a primary channel.

10. The apparatus of claim 9, wherein the transceiver is further configured to allocate the power for transmission of data on the primary channel prior to allocating power for the data transmission on the secondary channel in the succeeding frame.

11. The apparatus of claim 10, wherein the transceiver is further configured to allocate the power for transmission of data on the primary channel for a minimum set of data.

12. The apparatus of claim 9, wherein the transceiver is further configured to select a data rate for transmission of data on the primary channel.

13. The apparatus of claim 12, wherein the transceiver is configured to select the data rate for transmission of data on the primary channel by selecting a highest supported data rate that is no greater than a maximum data rate specified by a base station.

14. The apparatus of claim 13, wherein the transceiver is further configured to determine which of a plurality of data rates are supported based on information corresponding to a preceding frame.

15. A storage medium readable by a processor, wherein the storage medium has embodied therein program instructions configured to cause the processor to perform the method comprising:

determining probability values associated with one or more numbers of attempted data transmissions; and

for each of a plurality of pending data transmissions,

determining a number of times the data transmission has been attempted on a secondary channel in one or more preceding frames,

determining a probability associated with the number of times the data transmission has been attempted, and

allocating power for the data transmission on the secondary channel in a succeeding frame based upon the probability associated with the number of times the data transmission has been attempted.