CHANNEL STATE INFORMATION PROCEDURE FOR ENHANCED COMPONENT CARRIERS
First Claim
1. A method for wireless communication, comprising:
- receiving one or more downlink reference signals in a variable length downlink transmission time interval (TTI), wherein the variable length downlink TTI comprises a variable number of downlink symbols;
estimating channel state information (CSI) for one or more of the downlink reference signals; and
identifying at least a portion of the estimated CSI for transmission in a CSI report in a variable length uplink TTI.
1 Assignment
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Accused Products
Abstract
Techniques are provided for transmitting reference signals and CSI reports within a wireless communications system using variable length downlink or uplink transmission time intervals (TTIs). CSI reference signals and CSI reports may be transmitted at times that accommodate the variable length TTIs. A UE may receive signaling that indicates when a CSI reference signal is to be transmitted, and when a CSI report is to be transmitted to a base station. CSI reporting may be performed periodically using a physical uplink control channel (PUCCH) in designated uplink symbols, may be aperiodic using a physical uplink shared channel (PUSCH), or a combination thereof. A UE may receive signaling indicating periodic CSI reporting, aperiodic CSI reporting, or both. Such signaling may be received, for example, via radio resource control (RRC) signaling or within a downlink or uplink grant.
29 Citations
30 Claims
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1. A method for wireless communication, comprising:
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receiving one or more downlink reference signals in a variable length downlink transmission time interval (TTI), wherein the variable length downlink TTI comprises a variable number of downlink symbols; estimating channel state information (CSI) for one or more of the downlink reference signals; and identifying at least a portion of the estimated CSI for transmission in a CSI report in a variable length uplink TTI. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for wireless communication, comprising:
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means for receiving one or more downlink reference signals in a variable length downlink transmission time interval (TTI), wherein the variable length downlink TTI comprises a variable number of downlink symbols; means for estimating channel state information (CSI) for one or more of the downlink reference signals; and means for identifying at least a portion of the estimated CSI for transmission in a CSI report in a variable length uplink TTI. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. An apparatus for wireless communication, comprising:
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a processor; memory in electronic communication with the processor; and instructions stored in the memory, the instructions being executable by the processor to cause the apparatus to; receive one or more downlink reference signals in a variable length downlink transmission time interval (TTI), wherein the variable length downlink TTI comprises a variable number of downlink symbols; estimate channel state information (CSI) for one or more of the downlink reference signals; and identify at least a portion of the estimated CSI for transmission in a CSI report in a variable length uplink TTI. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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24. A non-transitory computer-readable medium storing computer-executable code for wireless communication, the code executable to:
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receive one or more downlink reference signals in a variable length downlink transmission time interval (TTI), wherein the variable length downlink TTI comprises a variable number of downlink symbols; estimate channel state information (CSI) for one or more of the downlink reference signals; and identify at least a portion of the estimated CSI for transmission in a CSI report in a variable length uplink TTI. - View Dependent Claims (25, 26, 27, 28, 29, 30)
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Specification