CSI reporting for LTE-TDD eIMTA

A user equipment (UE) apparatus configured for time-division duplex (TDD) wireless communication with a base station, comprising:

• a processor configured to:
• receive a channel state information (CSI) request from the base station;
• determine, based at least in part on receiving the CSI request, that CSI is to be estimated for an anchor reference TDD subframe, or a non-anchor reference TDD subframe, or a combination thereof, wherein, for a TDD frame structure associated with a plurality of TDD UL/DL configurations, non-anchor subframes are associated with a subframe number of the TDD frame structure having both uplink and downlink configurations, and anchor subframes are associated with a subframe number of the TDD frame structure not having both uplink and downlink configurations;
• estimate CSI based at least in part on the determining, wherein the estimating CSI comprises estimating an anchor CSI for the determined anchor reference TDD subframe, or estimating a non-anchor CSI for the determined non-anchor reference TDD subframe, or a combination thereof;
• and
• transmit at least a portion of the estimated CSI in an identified uplink subframe, the identified uplink subframe determined based at least in part on a time of receipt of the CSI request;
• and
• a memory coupled to the processor.

A user equipment (UE) apparatus configured for time-division duplex (TDD) wireless communication with a base station, comprising:

• means for receiving a channel state information (CSI) request from the base station;
• means for determining, based at least in part on receiving the CSI request, that CSI is to be estimated for an anchor reference TDD subframe, or a non-anchor reference TDD subframe, or a combination thereof, wherein, for a TDD frame structure associated with a plurality of TDD UL/DL configurations, non-anchor subframes are associated with a subframe number of the TDD frame structure having both uplink and downlink configurations, and anchor subframes are associated with a subframe number of the TDD frame structure not having both uplink and downlink configurations;
• means for estimating CSI based at least in part on the determining, wherein the estimating CSI comprises estimating an anchor CSI for the determined anchor reference TDD subframe, or estimating a non-anchor CSI for the determined non-anchor reference TDD subframe, or a combination thereof;
• and
• means for transmitting at least a portion of the estimated CSI in an identified uplink subframe, the identified uplink subframe determined based at least in part on a time of receipt of the CSI request.

A non-transitory computer-readable medium comprising code for time division duplex (TDD) wireless communication by a user equipment (UE), the code comprising instructions executable by a processor to:

• receive a channel state information (CSI) request from a base station;
• determine, based at least in part on receiving the CSI request, that CSI is to be estimated for an anchor reference TDD subframe, or a non-anchor reference TDD subframe, or a combination thereof wherein, for a TDD frame structure associated with a plurality of TDD UL/DL configurations, non-anchor subframes are associated with a subframe number of the TDD frame structure having both uplink and downlink configurations, and anchor subframes are associated with a subframe number of the TDD frame structure not having both uplink and downlink configurations;
• estimate CSI based at least in part on the determining, wherein the estimating CSI comprises estimating an anchor CSI for the determined anchor reference TDD subframe, or estimating a non-anchor CSI for the determined non-anchor reference TDD subframe, or a combination thereof;
• and
• transmitting at least a portion of the estimated CSI in an identified uplink subframe, the identified uplink subframe determined based at least in part on a time of receipt of the CSI request.