Method for Efficient CQI Feedback
First Claim
1. A method for processing signals in a communication system comprising a transmitting device and a plurality of receiving devices, the method comprising:
- receiving a first message from the transmitting device at a first receiving device, where the first message instructs the first receiving device to begin feeding back channel feedback information; and
transmitting channel feedback information over an uplink channel to the transmitting device and in response to the first message such that the channel feedback information is transmitted only during a first feedback window without requiring receipt of a separate message to stop transmission of the channel feedback information over the uplink channel.
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Accused Products
Abstract
In a closed-loop wireless communication system (300), channel-side information—such as CQI information, rank adaptation information or MIMO codebook selection information—is fed back to the transmitter (310) in response to a start message (301) using a configurable or default time period or window by having the receiver (320) automatically terminate feedback upon expiration of the time period/window. The receiver (330) may continue or interrupt the feedback upon receipt of appropriate messaging (e.g., 306) from the transmitter (310).
131 Citations
25 Claims
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1. A method for processing signals in a communication system comprising a transmitting device and a plurality of receiving devices, the method comprising:
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receiving a first message from the transmitting device at a first receiving device, where the first message instructs the first receiving device to begin feeding back channel feedback information; and transmitting channel feedback information over an uplink channel to the transmitting device and in response to the first message such that the channel feedback information is transmitted only during a first feedback window without requiring receipt of a separate message to stop transmission of the channel feedback information over the uplink channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A receiver for use in a wireless LTE communication system, comprising:
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channel detection logic operable to generate channel feedback information from transmission channel state information; and transmission logic operable to transmit the channel feedback information in response to receiving a first message from a transmitting device such that the channel feedback information is transmitted only during a feedback window without requiring receipt of a separate message to stop transmission of the channel feedback information. - View Dependent Claims (14, 15, 16)
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17. A method for processing signals in a communication system comprising a base station and one or more user equipment devices, wherein the base station communicates with each user equipment device over a respective transmission channel, the method comprising:
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transmitting from a base station to one or more user equipment devices a start message, where the start message instructs the one or more user equipment devices to begin feeding back channel feedback information; and receiving channel feedback information at the base station from a user equipment device that is fed back only during a predetermined feedback window without requiring transmission by the base station of a separate message to stop feedback of the channel feedback information. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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25. A method for processing signals in a wireless LTE communication system comprising:
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receiving a configuration message from a base transceiver station at a user equipment device, where the configuration message comprises one or more separately configurable feedback window parameters for specifying a predetermined window for feeding back CQI reports; estimating channel state information for a transmission channel from the base transceiver station to the user equipment device based on one or more received signals; using the channel state information to generate CQI reports for the transmission channel to the user equipment device; receiving a start message from the base transceiver station at the user equipment device, where the start message instructs the user equipment device to begin feeding back CQI reports; and transmitting, in response to the start message, CQI reports using a single carrier frequency division multiple access (SC-FDMA) uplink channel only during the predetermined window without requiring receipt of a separate message to stop transmission of the CQI reports.
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Specification