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US 12,082,026 B2Granted
Communicating channel state information (CSI) of multiple transmission points
AssigneeInterDigital Patent Holdings, Inc.
InventorsPaul Marinier, Diana Pani, J. Patrick Tooher, Marian Rudolf
Life of this patent
Estimating the term…
Abstract
Embodiments contemplate methods and systems for determining and communicating channel state information (CSI) for one or more transmission points (or CSI reference signal resources). Embodiments further contemplate determining transmission states may include applying at least one CSI process for channel state information (CSI) reporting. Embodiments also contemplate aperiodic and/or periodic reporting of one or more report types (e.g., rank indicator (RI)) of CSI, perhaps based on one or more reporting modes that may be configured for each of the one or more CSI process.
Claims16
A wireless transmit/receive unit (WTRU), the WTRU comprising:
- a transceiver;
- and
- a processor, the processor configured at least to:
- receive, via the transceiver, a first configuration information that indicates a first set of channel state information (CSI) reference signal (CSI-RS) resources for a serving cell, the first configuration information comprising a first configuration of non-zero-power (NZP) CSI-RS resources that indicates a first set of NZP CSI-RS resources for the serving cell and a first configuration of CSI interference measurement (CSI-IM) resources that indicates a first set of CSI-IM resources for the serving cell, the first configuration that indicates the first set of CSI-RS resources further indicating a first assumed ratio of physical downlink shared channel (PDSCH) energy per resource element (EPRE) to a first NZP CSI-RS EPRE;
- receive, via the transceiver, a second configuration information that indicates a second set of CSI-RS resources for the serving cell, the second set of CSI-RS resources comprising a second configuration of NZP CSI-RS resources that indicates a second set of NZP CSI-RS resources for the serving cell and a second configuration of CSI-IM resources that indicates a second set of CSI-IM resources for the serving cell, the second configuration that indicates the second set of CSI-RS resources further indicating a second assumed ratio of PDSCH EPRE to a second NZP CSI-RS EPRE;
- perform a first set of one or more measurements using the first set of NZP CSI-RS resources and the first set of CSI-IM resources;
- perform a second set of one or more measurements using the second set of NZP CSI-RS resources and the second set of CSI-IM resources;
- in response to a determination that a first aperiodic CSI report associated the first set of CSI-RS resources has been triggered, send, via the transceiver, the first aperiodic CSI report, the first aperiodic CSI report being based on the first set of one or more measurements performed using the first set of NZP CSI-RS resources and the first set of CSI-IM resources;
- and
- in response to a determination that a second aperiodic CSI report associated with the second set of CSI-RS resources been triggered, send, via the transceiver, the second aperiodic CSI report, the second aperiodic CSI report being based on the second set of one or more measurements performed using the second set of NZP CSI-RS resources and the second set of CSI-IM resources.
7 more elements
A method performed by a wireless transmit/receive unit (WTRU), the method comprising:
- receiving, by the WTRU, a first configuration information that indicates a first set of channel state information (CSI) reference signal (CSI-RS) resources for a serving cell, the first configuration information comprising a first configuration of non-zero-power (NZP) CSI-RS resources that indicates a first set of NZP CSI-RS resources for the serving cell and a first configuration of CSI interference measurement (CSI-IM) resources that indicates a first set CSI-IM resources for the serving cell, the first configuration information that indicates the first set of CSI-RS resources further indicating a first assumed ratio of physical downlink shared channel (PDSCH) energy per resource element (EPRE) to a first NZP CSI-RS EPRE;
- receiving, by the WTRU, a second configuration information that indicates a second set of CSI-RS resources for the serving cell, the second set of CSI-RS resources comprising a second configuration of NZP CSI-RS resources that indicates a second set of NZP CSI-RS resources for the serving cell and a second configuration of CSI-IM resources that indicates a second set of CSI-IM resources for the serving cell, the second configuration information that indicates the second set of CSI-RS resources further indicating a second assumed ratio of PDSCH EPRE to a second NZP CSI-RS EPRE;
- performing a first set of one or more measurements using the first set of NZP CSI-RS resources and the first set of CSI-IM resources;
- performing a second set of one or more measurements using the second set of NZP CSI-RS resources and the second set of CSI-IM resources;
- sending, by the WTRU, a first aperiodic CSI report that is based on the first set of one or more measurements performed using the first set of NZP CSI-RS resources and the first set of CSI-IM resources in response to a determination that the first aperiodic CSI report associated with the first set of CSI-RS resources has been triggered;
- and
- sending, by the WTRU, a second aperiodic CSI report that is based on the second set of one or more measurements performed using the second set of NZP CSI-RS resources and the second set of CSI-IM resources in response to a determination that the second aperiodic CSI report associated with the second set of CSI-RS resources has been triggered.
4 more elements
A base station comprising:
- a transceiver;
- and
- a processor, the processor configured at least to:
- send, via the transceiver to a wireless transmit/receive unit (WTRU), a first configuration information that indicates a first set of channel state information (CSI) reference signal (CSI-RS) resources for a serving cell, the first configuration information comprising a first configuration of non-zero-power (NZP) CSI-RS resources that indicates a first set of NZP CSI-RS resources for the serving cell and a first configuration of CSI interference measurement (CSI-IM) resources that indicates a first set of CSI-IM resources for the serving cell, the first configuration that indicates the first set of CSI-RS resources further indicating a first assumed ratio of physical downlink shared channel (PDSCH) energy per resource element (EPRE) to a first NZP CSI-RS EPRE;
- send, via the transceiver to the WTRU, a second configuration information that indicates a second set of CSI-RS resources for the serving cell, the second set of CSI-RS resources comprising a second configuration of NZP CSI-RS resources that indicates a second set of NZP CSI-RS resources for the serving cell and a second configuration of CSI-IM resources that indicates a second set of CSI-IM resources for the serving cell, the second configuration that indicates the second set of CSI-RS resources further indicating a second assumed ratio of PDSCH EPRE to a second NZP CSI-RS EPRE;
- send, via the transceiver to the WTRU, a first aperiodic CSI report trigger, the first aperiodic report trigger indicating a request for a first aperiodic CSI report that is based on a first set of one or more measurements performed using the first set of NZP CSI-RS resources and the first set of CSI-IM resources;
- receive, via the transceiver from the WTRU, the first aperiodic CSI report;
- send, via the transceiver to the WTRU, a second aperiodic CSI report trigger, the second aperiodic report trigger indicating a request for a second aperiodic CSI report that is based on a second set of one or more measurements performed using the second set of NZP CSI-RS resources and the second set of CSI-IM resources;
- and
- receive, via the transceiver from the WTRU, the second aperiodic CSI report.
7 more elements
Dependencies are inferred from the claim text.