Method and apparatus for high rate packet data transmission
First Claim
1. A method for wireless communications, comprising:
- transmitting a pilot signal from a first station, the pilot signal having a fixed spatial pattern and being non-varying over time, independent of measurements made by other stations based on the pilot signal;
periodically receiving information indicative of a quality measure of a wireless channel from a second station, the information being determined by the second station based on the pilot signal from the first station and being sent periodically from the second station to the first station to provide updates on the quality measure of the wireless channel; and
transmitting, from the first station to the second station, a signal at a data rate determined based on the received information, wherein the data rate is used for an initial transmission of the signal.
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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.
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Citations
35 Claims
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1. A method for wireless communications, comprising:
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transmitting a pilot signal from a first station, the pilot signal having a fixed spatial pattern and being non-varying over time, independent of measurements made by other stations based on the pilot signal; periodically receiving information indicative of a quality measure of a wireless channel from a second station, the information being determined by the second station based on the pilot signal from the first station and being sent periodically from the second station to the first station to provide updates on the quality measure of the wireless channel; and transmitting, from the first station to the second station, a signal at a data rate determined based on the received information, wherein the data rate is used for an initial transmission of the signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 14, 15, 16, 17, 18)
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8. An apparatus adapted for wireless communications, comprising:
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means for transmitting a pilot signal from a first station, the pilot signal having a fixed spatial pattern and being non-varying over time, independent of measurements made by other stations based on the pilot signal; means for periodically receiving information indicative of a quality measure of a wireless channel from a second station, the information being determined by the second station based on the pilot signal from the first station and being sent periodically from the second station to the first station to provide updates on the quality measure of the wireless channel; and means for transmitting, from the first station to the second station, a signal at a data rate determined based on the received information, wherein the data rate is used for an initial transmission of the signal. - View Dependent Claims (9, 10, 11, 12, 13, 19, 20, 21, 22, 23)
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24. A non-transitory computer-readable medium encoded with a computer program for increasing data throughput and efficiency in a communication system, comprising:
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instructions for sending a pilot signal from a first station, the pilot signal having a fixed spatial pattern and being non-varying over time, independent of measurements made by other stations based on the pilot signal; instructions for periodically receiving information indicative of a quality measure of a wireless channel from a second station, the information being determined by the second station based on the pilot signal from the first station and being sent periodically from the second station to the first station to provide updates on the quality measure of the wireless channel; and instructions for sending, from the first station to the second station, a signal at a data rate determined based on the received information, wherein the data rate is used for an initial transmission of the signal.
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25. An apparatus for wireless communications, comprising:
at least one processor configured to send a pilot signal from a first station, the pilot signal having a fixed spatial pattern and being non-varying over time, independent of measurements made by other stations based on the pilot signal, to periodically receive information indicative of a quality measure of a wireless channel from a second station, the information being determined by the second station based on the pilot signal from the first station and being sent periodically from the second station to the first station to provide updates on the quality measure of the wireless channel, and to transmit, from the first station to the second station, a signal at a data rate determined based on the received information, wherein the data rate is used for an initial transmission of the signal. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
Specification