CHANNEL QUALITY HANDLING FOR PRECODER OVERRIDE
First Claim
Patent Images
1. A method of operating a first radio communication device in a wireless communication system, comprising:
- receiving recommended precoder information and channel quality information from a second radio communication device;
wherein the recommended precoder information is associated with a recommended precoder and the channel quality information is associated with the recommended precoder,selecting the recommended precoder or a different, first alternate precoder for a transmission to the second radio communication device;
determining a first channel quality adjustment if the recommended precoder is selected and a different, second channel quality adjustment if the first alternate precoder is selected;
adjusting the channel quality information to use for transmission based on the determined channel quality adjustment;
allocating transmission resources based on the adjusted channel quality information;
precoding a signal to be transmitted to the second radio communications device in accordance with the selected precoder; and
performing transmission of the precoded signal to the second radio communication device using the transmission resources allocated based on the adjusted channel quality information,wherein the first alternate precoder is selected for transmission to the second radio communication device.
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Abstract
Technology is described that allows the transmitter to make different channel quality adjustments to reported channel quality information for use in allocating resources for subsequent transmissions depending on whether a precoder recommendation is used or overridden. When a reported precoder recommendation is overridden in favor of an alternate precoder, a different channel quality adjustment value associated with the alternate precoder is used, which results in improved transmission performance.
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Citations
23 Claims
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1. A method of operating a first radio communication device in a wireless communication system, comprising:
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receiving recommended precoder information and channel quality information from a second radio communication device; wherein the recommended precoder information is associated with a recommended precoder and the channel quality information is associated with the recommended precoder, selecting the recommended precoder or a different, first alternate precoder for a transmission to the second radio communication device; determining a first channel quality adjustment if the recommended precoder is selected and a different, second channel quality adjustment if the first alternate precoder is selected; adjusting the channel quality information to use for transmission based on the determined channel quality adjustment; allocating transmission resources based on the adjusted channel quality information; precoding a signal to be transmitted to the second radio communications device in accordance with the selected precoder; and performing transmission of the precoded signal to the second radio communication device using the transmission resources allocated based on the adjusted channel quality information, wherein the first alternate precoder is selected for transmission to the second radio communication device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. Apparatus for use in a first radio communication device in a wireless communication system comprising electronic circuitry configured to:
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receive recommended precoder information and channel quality information from a second radio communication device; wherein the recommended precoder information is associated with a recommended precoder and the channel quality information is associated with the recommended precoder, select the recommended precoder or a different, first alternate precoder for a transmission to the second radio communication device; determine a first channel quality adjustment when the recommended precoder is selected and a different, second channel quality adjustment when the first alternate precoder is selected; adjust the channel quality information to use for transmission based on the determined channel quality adjustment; allocate transmission resources based on the adjusted channel quality information; precode a signal to be transmitted to the second radio communications device in accordance with the selected precoder; and perform transmission of the precoded signal to the second radio communication device using the transmission resources allocated based on the adjusted channel quality information. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification