CSI REPORTING FOR LTE-TDD EIMTA

摘要

Methods, systems, and devices are described for providing periodic CSI reports and/or aperiodic CSI reports to provide CSI for both anchor and non-anchor TDD subframes in eIMTA. Periodic CSI reports may be provided based on a reference configuration, and aperiodic CSI reports may be provided based on a time of reception of a CSI request and a reference configuration. A UE may determine to report anchor or non-anchor CSI through explicit or implicit signaling. Aperiodic CSI may be used for transmission of anchor subframe CSI reports and periodic CSI may be used for transmission of non-anchor subframe CSI reports, or aperiodic CSI may be used for transmission of non-anchor subframe CSI reports and periodic CSI may be used for transmission of anchor subframe CSI reports. A determination of the reference subframe for aperiodic CSI estimation may be based on a time of receipt of an aperiodic CSI request.

主权项

1. A method of wireless communication performed by a user equipment (UE) in time-division duplex (TDD) communication with a base station, comprising:
receiving a channel state information (CSI) request from the base station; determining that CSI is to be estimated for an anchor reference TDD subframe or a non-anchor reference TDD subframe responsive to receiving the CSI request; estimating an anchor CSI for the anchor reference TDD subframe or a non-anchor CSI for the non-anchor reference TDD subframe; and transmitting at least a portion of the anchor CSI or the non-anchor 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.