Method and apparatus for high rate packet data transmission

• US 20070025267A1
• Filed: 09/29/2006
• Published: 02/01/2007
• Est. Priority Date: 11/03/1997
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Sindhushayana, Nagabhushana, Padovani, Roberto, Hinderling, Jurg, Black, Peter, Wheatley, Charles, Bender, Paul, Grob, Matthew
• Granted Patent: US 8,351,372 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• 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 in a wireless communication system, comprising:

measuring channel quality of a link in the communication system;

periodically transmitting a quality indicator, wherein the quality indicator maps to a transmission modulation format; and

receiving data as a function of the quality indicator.

2. The method as in claim 1, wherein measuring channel quality of the link comprises:

periodically measuring Carrier-to-Interference (C/I) of the link to determine a transmission modulation format.

3. The method as in claim 2, wherein periodically measuring C/I comprises:

at every time slot measuring Carrier-to-Interference (C/I) of the link to determine a transmission modulation format.

4. The method as in claim 2, wherein each transmission modulation format corresponds to a transmission data rate.

5. The method as in claim 4, wherein the quality indicator is an index, wherein the index specifies a transmission modulation format and a transmission data rate.

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

determining a transmission data rate based on the channel quality;

determining a modulation format as a function of the transmission data rate; and

determining a quality indicator as a function of the transmission data rate and the modulation format.

7. The method as in claim 6, wherein a constellation of the transmission modulation format corresponds to at least one data rate.

8. The method as in claim 1, wherein the transmission modulation format is one of a set of modulation formats corresponding to a set of data rates.

9. An apparatus for a wireless communication system, comprising:

means for measuring channel quality of a link in the communication system;

means for periodically transmitting a quality indicator, wherein the quality indicator maps to a modulation format for transmission; and

means for receiving data as a function of the quality indicator.

10. The apparatus as in claim 9, wherein the means for measuring channel quality of the link comprises:

means for periodically measuring Carrier-to-Interference (C/I) of the link to determine a modulation format.

11. The apparatus as in claim 10, wherein means for periodically measuring C/I comprises:

means for measuring Carrier-to-Interference (C/I) of the link at every time slot to determine a modulation format.

12. The apparatus as in claim 9, wherein each modulation format corresponds to a transmission data rate.

13. The apparatus as in claim 12, wherein the quality indicator is an index, wherein the index specifies a modulation format and transmission data rate.

14. The apparatus as in claim 9, further comprising:

means for determining a transmission data rate based on the channel quality;

means for determining a modulation format as a function of the transmission data rate; and

means for determining a quality indicator as a function of the transmission data rate and the modulation format.

15. The apparatus as in claim 14, wherein a constellation of the modulation format corresponds to at least one data rate.

16. The apparatus as in claim 9, wherein the modulation format is one of a set of modulation formats corresponding to a set of data rates.

17. The apparatus as in any of claims 9 to 16, wherein the apparatus is a computer program product and is to increase data throughput and efficiency when coupled to a computing device.

18. A computer program product for a communication system, comprising:

first plurality of instructions for measuring channel quality of a link in the communication system;

second plurality of instructions for periodically transmitting a quality indicator, wherein the quality indicator maps to a transmission modulation format; and

third plurality of instructions for receiving data as a function of the quality indicator.

19. A method in a communication system, comprising:

periodically receiving a quality indicator, wherein the quality indicator maps to a transmission data rate; and

transmitting data as a function of the quality indicator.

20. The method as in claim 19, wherein transmitting data comprises:

transmitting data as a function of the quality indictor based on knowledge of the presence or absence of data transmissions.

21. An apparatus for a wireless communication system, comprising:

means for periodically receiving a quality indicator, wherein the quality indicator maps to a transmission data rate; and

means for transmitting data as a function of the quality indicator.

22. The apparatus as in claim 21, further comprising:

means for scheduling by transmitting data as a function of the quality indictor based on knowledge of the presence or absence of data transmissions

23. The apparatus as in any of claims 21 to 22, wherein the apparatus is a computer program product and is to increase data throughput and efficiency when coupled to a computing device.

24. A computer program product for a communication system, comprising:

first plurality of instructions for periodically receiving a quality indicator, wherein the quality indicator maps to a transmission data rate; and

second plurality of instructions for transmitting data as a function of the quality indicator.