Network-controlled feedback for MIMO systems
First Claim
Patent Images
1. A method implemented by a receiving station in a mobile communication network of controlling feedback load on an uplink channel, said method comprising:
- providing channel quality feedback to a multiple antenna transmitting station for a first downlink transmission mode corresponding to a first antenna configuration;
generating a performance metric; and
if the performance metric exceeds a first threshold, providing channel quality feedback for one or more additional downlink transmission modes to said transmitting station.
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Abstract
In a selective MIMO system, the mobile station provides channel quality feedback for one or more possible transmission mode. The mobile station provides channel quality feedback for a first mode regardless of channel conditions and determines whether to provide feedback for one or more additional modes based on current channel conditions.
99 Citations
30 Claims
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1. A method implemented by a receiving station in a mobile communication network of controlling feedback load on an uplink channel, said method comprising:
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providing channel quality feedback to a multiple antenna transmitting station for a first downlink transmission mode corresponding to a first antenna configuration;
generating a performance metric; and
if the performance metric exceeds a first threshold, providing channel quality feedback for one or more additional downlink transmission modes to said transmitting station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A receiving station in a mobile communication network comprising:
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a receiver to receive signals from a remote station;
a transmitter to transmit signals to the remote station; and
a controller operatively connected to the receiver and transmitter for controlling the receiver and transmitter, said controller operative to;
provide channel quality feedback to a multiple antenna transmitting station for a first downlink transmission mode corresponding to a first antenna configuration;
generate a performance metric; and
provide channel quality feedback for one or more additional downlink transmission modes to said remote station if the performance metric exceeds a first threshold. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A base station in a mobile communication network comprising:
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a controller configured to generate a feedback threshold based on conditions associated with a downlink channel for one or more remote stations; and
a transmitter configured to transmit the feedback threshold to one or more of the remote stations to control an amount of channel quality feedback received at a multiple antenna transmitting station from the remote stations. - View Dependent Claims (24, 25, 26)
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27. A method for controlling an amount of channel quality feedback received at a base station from one or more remote stations in a mobile communication network, the method comprising:
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generating a feedback threshold based on conditions associated with downlink channels between a base station and one or more remote stations; and
transmitting the feedback threshold from the base station to one or more of the remote stations to control an amount of channel quality feedback received at a multiple antenna transmitting station from the remote stations. - View Dependent Claims (28, 29, 30)
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Specification