Method and apparatus for high rate packet data transmission

• US 20060280160A1
• Filed: 08/03/2006
• Published: 12/14/2006
• Est. Priority Date: 11/03/1997
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Black, Peter J., Wheatley, Charles E. III, Grob, Matthew S., Bender, Paul E., Padovani, Roberto, Sindhushayana, Nagabhushana T., Hinderling, Jurg K.
• Granted Patent: US 8,311,027 B2
• Time in Patent Office: Days
• US Class Current: 370/347
• CPC Class Codes: H04B 7/264 for data rate control
• CPC Class Codes: H04L 1/0002 by adapting the transmission rate
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/1809 Selective-repeat protocols
• CPC Class Codes: H04L 1/1829 Arrangements specially adapted for the receiver end
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 28/04 Error control
• CPC Class Codes: H04W 28/22 Negotiating communication rate
• CPC Class Codes: H04W 74/04 Scheduled access hybrid access H04W74/02
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

In a data communication system capable of variable rate transmission, high rate packet data transmission improves utilization of the forward link and decreases the transmission delay. Data transmission on the forward link is time multiplexed and the base station transmits at the highest data rate supported by the forward link at each time slot to one mobile station. The data rate is determined by the largest C/I measurement of the forward link signals as measured at the mobile station. Upon determination of a data packet received in error, the mobile station transmits a NACK message back to the base station. The NACK message results in retransmission of the data packet received in error. The data packets can be transmitted out of sequence by the use of sequence number to identify each data unit within the data packets.

Claims

1. A method for wireless communications, comprising:

receiving, continuously, information indicative of a quality measure of a wireless channel; and

transmitting a signal at a data rate based on the received information.

2. The method of claim 1, wherein the signal comprises a data packet having a predetermined number of data units.

3. The apparatus of claim 2, further comprising receiving a negative acknowledgement (NACK) message associated with a missing or an erroneous data unit.

4. The apparatus of claim 3, further comprising retransmitting a data unit responsive to the NACK message.

5. The method of claim 2, further comprising transmitting the data packet in a predetermined number of time slots.

6. The method of claim 5, wherein the time slots are non-contiguous.

7. The method of claim 5, further comprising transmitting the data packet at a peak transmit power for a duration of at least one of the time slots.

8. An apparatus adapted for wireless communications, comprising:

means for continuously receiving information indicative of a quality measure of a wireless channel; and

means for transmitting a signal at a data rate based on the received information.

9. The apparatus of claim 8, wherein the signal comprises a data packet having a predetermined number of data units.

10. The apparatus of claim 9, further comprising means for receiving a negative acknowledgement (NACK) message associated with a missing or an erroneous data unit.

11. The apparatus of claim 10, further comprising means for retransmitting a data unit responsive to the NACK message.

12. The apparatus of claim 9, further comprising means for transmitting the data packet in a predetermined number of time slots.

13. The apparatus of claim 12, further comprising means for transmitting the data packet at a peak transmit power for a duration of at least one of the time slots.

14. A method for wireless communications, comprising:

receiving, continuously, information indicative of a quality measure of a wireless channel; and

determining at least one of a modulation format and a coding scheme for transmitting a signal based on the received information.

15. The method of claim 14, further comprising transmitting the signal at a data rate corresponding to the at least one of the modulation format and the coding scheme determined.

16. An apparatus adapted for wireless communications, comprising:

means for continuously receiving information indicative of a quality measure of a wireless channel; and

means for determining at least one of a modulation format and a coding scheme for transmitting a signal based on the received information.

17. The apparatus of claim 16, further comprising means for transmitting the signal at a data rate corresponding to the at least one of the modulation format and the coding scheme determined.

18. A method for wireless communications, comprising:

receiving data request messages from a plurality of mobile stations, each message containing an indication of a quality measure of a wireless channel; and

scheduling transmissions based on the data request messages from the plurality of mobile stations.

19. The method of claim 18, wherein each data request message corresponds to a data rate.

20. An apparatus adapted for wireless communications, comprising:

means for receiving data request messages from a plurality of mobile stations, each message containing an indication of a quality measure of a wireless channel; and

means for scheduling transmissions based on the data request messages from the plurality of mobile stations.