Transmission mode and rate selection for a wireless communication system
First Claim
1. A method of selecting a transmission mode for data transmission in a wireless communication system, comprising:
- determining the age of channel information available for use to transmit data via a wireless channel; and
selecting a transmission mode from among a plurality of transmission modes based on the age of the channel information, wherein data is transmitted via the wireless channel in accordance with the selected transmission mode.
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Accused Products
Abstract
To select a transmission mode to use for a data transmission via a MIMO channel from station A to station B, station A obtains channel information used for spatial processing and determines the age of this information. Station A selects one of multiple transmission modes based on the age of the channel information and possibly other information (e.g., the fading characteristic of the MIMO channel). To select rate(s) to use for the data transmission, station A obtains channel state information (CSI) indicative of the received signal quality for the MIMO channel, e.g., received SNRs or “initial” rates. Station A determines the age of the CSI and selects one or more “final” rates based on the CSI, the age of the CSI, the selected transmission mode, and possibly other information. Station A processes data in accordance with the selected transmission mode and final rate(s) and transmits the processed data to station B.
86 Citations
36 Claims
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1. A method of selecting a transmission mode for data transmission in a wireless communication system, comprising:
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determining the age of channel information available for use to transmit data via a wireless channel; and
selecting a transmission mode from among a plurality of transmission modes based on the age of the channel information, wherein data is transmitted via the wireless channel in accordance with the selected transmission mode. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus in a wireless communication system, comprising:
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a controller to determine the age of channel information available for use to transmit data via a wireless channel and to select a transmission mode from among a plurality of transmission modes based on the age of the channel information; and
a spatial processor to spatially process data in accordance with the selected transmission mode. - View Dependent Claims (9, 10, 11)
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12. An apparatus in a wireless communication system, comprising:
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means for determining the age of channel information available for use to transmit data via a wireless channel; and
means for selecting a transmission mode from among a plurality of transmission modes based on the age of the channel information, wherein data is transmitted via the wireless channel in accordance with the selected transmission mode. - View Dependent Claims (13, 14, 15)
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16. A method of performing rate selection for data transmission in a wireless communication system, comprising:
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obtaining channel state information indicative of received signal quality for a wireless channel used for data transmission;
determining the age of the channel state information; and
selecting at least one rate for data transmission via the wireless channel based on the channel state information and the age of the channel state information. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. An apparatus in a wireless communication system, comprising:
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a controller to obtain channel state information indicative of received signal quality for a wireless channel used for data transmission, to determine the age of the channel state information, and to select at least one rate for data transmission via the wireless channel based on the channel state information and the age of the channel state information, wherein a plurality of rates are supported by the system, and wherein each of the at least one rate is selected from among the plurality of rates supported by the system; and
a data processor to process data in accordance with the at least one rate selected by the controller. - View Dependent Claims (27, 28, 29)
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30. An apparatus in a wireless communication system, comprising:
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means for obtaining channel state information indicative of received signal quality for a wireless channel used for data transmission;
means for determining the age of the channel state information; and
means for selecting at least one rate for data transmission via the wireless channel based on the channel state information and the age of the channel state information, wherein a plurality of rates are supported by the system, and wherein each of the at least one rate is selected from among the plurality of rates supported by the system. - View Dependent Claims (31, 32, 33)
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34. A method of performing transmission mode and rate selection in a wireless communication system, comprising:
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determining the age of channel information available for use to transmit data via a wireless channel;
selecting a transmission mode from among a plurality of transmission modes based on the age of the channel information;
obtaining channel state information indicative of received signal quality for the wireless channel;
determining the age of the channel state information; and
selecting at least one rate for data transmission based on the channel state information and the age of the channel state information, and wherein data is transmitted via the wireless channel in accordance with the transmission mode and the at least one rate selected for data transmission. - View Dependent Claims (35, 36)
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Specification