Efficient signaling over access channel
AssigneeQUALCOMM Incorporated
InventorsArak Sutivong, Edward Harrison Teague, Alexei Gorokhov
Life of this patent
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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.
Claims45
In a wireless communication system, a method of determining an indicator of channel quality, the method comprising:
- determining a metric of an observed transmission;
- determining an estimate of channel quality based on at least the metric of the observed transmission;
- 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, and wherein the selected access sequence is from the group of the plurality of groups corresponding to the determined estimate of channel quality;
- and
- transmitting the selected access sequence.
In a wireless communication system, an apparatus to determine an indicator of channel quality, the apparatus comprising:
- a receiver configured to receive observed transmissions;
- a processor configured to determine a metric of the observed transmission, 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;
- a selector configured to select an access sequence, randomly, from the group of the plurality of groups corresponding to the determined channel quality value;
- and
- a transmitter configured to transmit the selected access sequence.
In a wireless communication system, an apparatus for determining an indicator of channel quality, the apparatus comprising:
- means for determining a power level of an observed transmission;
- means for determining a CQI value as a function of the power level of the observed transmission;
- means for 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, and wherein the selected access sequence is from the group of the plurality of groups corresponding to the determined CQI value;
- and
- means for transmitting the selected access sequence.
In a wireless communication system, a method of transmitting information regarding access terminal needs, the method comprising:
- determining a received power level of an observed pilot signal;
- determining a CQI value as a function of the received power level;
- 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, the predetermined factors include a plurality of ranges of CQI values;
- and
- transmitting the selected access sequence.
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Dependencies are inferred from the claim text.