Efficient signaling over access channel
DCFirst Claim
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1. In a wireless communication system, a method of determining an indicator of channel quality, the method comprising:
- determining a metric of forward link geometry as a function of an observed transmission, wherein said observed transmission is selected from a group consisting of pilot signals, noise, and traffic on data channels, or any combination thereof;
determining an estimate of channel quality based on at least the metric of the forward link geometry; and
selecting an access sequence, randomly, from one group of a plurality of groups of access sequences,wherein the plurality of groups of access sequences correspond to different ranges of channel quality values, wherein a quantity of access sequences in the plurality of groups of access sequences are distributed non-uniformly, and the selected access sequence is from the group of the plurality of groups corresponding to the determined estimate of channel quality, the access sequences in the plurality of groups of access sequences are distributed in proportion to a number of access terminals requiring a given amount of power needed to send an indicator of acknowledgment to an access terminal.
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Abstract
An apparatus and method for transmitting an indicator of channel quality while minimizing the use of a broadcast channel is described. A metric of forward link geometry of observed transmission signals is determined. An indicator of channel quality value is determined as a function of the observed transmission signals. An access sequence is selected, randomly, from one group of a plurality of groups of access sequences, wherein each of the plurality of groups of access sequences correspond to different ranges of channel quality values.
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Citations
33 Claims
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1. In a wireless communication system, a method of determining an indicator of channel quality, the method comprising:
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determining a metric of forward link geometry as a function of an observed transmission, wherein said observed transmission is selected from a group consisting of pilot signals, noise, and traffic on data channels, or any combination thereof; determining an estimate of channel quality based on at least the metric of the forward link geometry; and selecting an access sequence, randomly, from one group of a plurality of groups of access sequences, wherein the plurality of groups of access sequences correspond to different ranges of channel quality values, wherein a quantity of access sequences in the plurality of groups of access sequences are distributed non-uniformly, and the selected access sequence is from the group of the plurality of groups corresponding to the determined estimate of channel quality, the access sequences in the plurality of groups of access sequences are distributed in proportion to a number of access terminals requiring a given amount of power needed to send an indicator of acknowledgment to an access terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. In a wireless communication system, an apparatus to determine an indicator of channel quality, the apparatus comprising:
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a processor configured to determine a metric of forward link geometry as a function of an observed transmission, wherein said observed transmission is selected from a group consisting of pilot signals, noise, and traffic on data channels, or any combination thereof, and to determine an estimate of channel quality as a function of at least the metric of the observed transmission; a memory element configured to store a plurality of groups of access sequences, wherein the plurality of groups of access sequences correspond to different ranges of channel quality values, and a plurality of access sequences in the plurality of groups of access sequences are distributed non-uniformly, such that the plurality of access of sequences are distributed in proportion to a number of access terminals requiring a given amount of power needed to send an indicator of acknowledgment to an access terminal; and a selector configured to select an access sequence, randomly, from the group of the plurality of groups corresponding to a determined channel quality value. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. In a wireless communication system, an apparatus for determining an indicator of channel quality, the apparatus comprising a processor and a memory, the memory containing program code executable by the processor for performing the following:
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determining a power level of an observed transmission, wherein said observed transmission is selected from the group consisting of pilot signals, noise, and traffic on data channels, or any combination thereof; determining a channel quality indicator (CQI) value as a function of the power level of the observed transmission; and selecting an access sequence, randomly, from one group of a plurality of groups of access sequences, wherein the plurality of groups of access sequences correspond to different ranges of CQI values, the selected access sequence is from the group of the plurality of groups corresponding to the determined CQI value, and the selecting further comprises selecting information indicative of access terminal requirements, wherein a quantity of access sequences in the plurality of groups of access sequences are distributed non-uniformly, the access sequences in the plurality of groups of access sequences are distributed in proportion to a number of access terminals requiring a given amount of power needed to send an indicator of acknowledgment to an access terminal. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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28. In a wireless communication system, a method of transmitting information regarding access terminal needs, the method comprising:
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determining a received power level of an observed pilot signal; determining a channel quality indicator (CQI) value as a function of the received power level; and selecting an access sequence, randomly, from one group of a plurality of groups of access sequences, wherein the plurality of groups of access sequences correspond to a plurality of predetermined factors, and wherein a quantity of access sequences in the plurality of groups of access sequences are distributed non-uniformly, the access sequences in the plurality of groups of access sequences are distributed in proportion to a number of access terminals requiring a given amount of power needed to send an indicator of acknowledgment to an access terminal. - View Dependent Claims (29)
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30. In a wireless communication system, a method of communicating a channel quality indicator (CQI), the method comprising:
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determining a power level of an observed pilot signal; determining a CQI value as a function of the power level of the observed pilot signal; selecting an access sequence, randomly, from one group of a plurality of groups of access sequences, wherein the plurality of groups of access sequences correspond to different CQI values, and wherein a quantity of access sequences in the plurality of groups of access sequences are distributed non-uniformly;
the access sequences in the plurality of groups of access sequences are distributed in proportion to a number of access terminals requiring a given amount of power needed to send an indicator of acknowledgment to an access terminal;appending the CQI value to the selected access sequence; and transmitting the selected access sequence and the CQI value.
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31. In a wireless communication system, an apparatus for transmitting information regarding access terminal needs, the apparatus comprising a processor and a memory, the memory containing program code executable by the processor for performing the following:
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determining a received power level of an observed pilot signal; determining a channel quality indicator (CQI) value as a function of the received power level; and selecting an access sequence, randomly, from one group of a plurality of groups of access sequences, wherein the plurality of groups of access sequences correspond to a plurality of predetermined factors, and wherein a quantity of access sequences in the plurality of, groups of access sequences are distributed non-uniformly, the access sequences in the plurality of groups of access sequences are distributed in proportion to a number of access terminals requiring a given amount of power needed to send an indicator of acknowledgment to an access terminal. - View Dependent Claims (32)
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33. In a wireless communication system, an apparatus for communicating a channel quality indicator (CQI), the apparatus comprising a processor and a memory, the memory containing program code executable by the processor for performing the following:
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determining a power level of an observed pilot signal; determining a CQI value as a function of the power level of the observed pilot signal; selecting an access sequence, randomly, from one group of a plurality of groups of access sequences, wherein the plurality of groups of access sequences correspond to different CQI values, and wherein a quantity of access sequences in the plurality of groups of access sequences are distributed non-uniformly, the access sequences in the plurality of groups of access sequences are distributed in proportion to a number of access terminals requiring a given amount of power needed to send an indicator of acknowledgment to an access terminal; appending the CQI value to the selected access sequence; and transmitting the selected access sequence and the CQI value.
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Specification