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US 12,756,434 B2Granted
Reference signal port mapping
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsFredrik Athley, Xinlin Zhang, Mattias Frenne
Life of this patent
Estimating the term…
Abstract
A method for reducing the number of beams required per symbol. The method is performed by a base station (gNB). The method includes transmitting reference signals (RSs) and receiving a report from a UE (302), the report identifying a matrix. The method also includes using the identified matrix to transmit data to the UE or schedule the UE. The matrix identified by the UE is equal to (I) and Wps is a port selection matrix and (II) denotes the Kronecker product.
Claims8
A method performed by a user equipment (UE), the method comprising:
- for each transmission point (TP) included in a selected set of N TPs, where N≥2 such that the set of N TPs includes at least a first TP and a second TP, obtaining a channel state information reference signal (CSI-RS) resource configuration for the TP, wherein the obtaining comprises:
- obtaining a first CSI-RS resource configuration for the first TP indicating resources that the first TP is configured to use to transmit a first CSI-RS;
- and
- obtaining a second CSI-RS resource configuration for the second TP indicating resources that the second TP is configured to use to transmit a second CSI-RS;
- receiving a CSI-RS from each one of the N TPs, wherein receiving a CSI-RS from each one of the N TPs comprises:
- receiving the first CSI-RS transmitted by the first TP;
- and
- receiving the second CSI-RS transmitted by the second TP;
- generating a CSI report based on an aggregation of the N CSI-RS resource configurations;
- and
- transmitting the CSI report to a base station, wherein
- generating a CSI report based on an aggregation of the N CSI-RS resource configurations comprises:
- the UE generating a first channel estimate, H1, based on a measurement of the first CSI-RS;
- the UE generating a second channel estimate, H2, based on a measurement of the second CSI-RS;
- the UE using H1 and H2 to produce an aggregated channel estimate;
- and
- the UE generating the CSI report based on the aggregated channel estimate (H).
14 more elements
A method performed by a user equipment (UE), the method comprising:
- for each transmission point (TP) included in a selected set of N TPs, where N≥2 such that the set of N TPs includes at least a first TP and a second TP, obtaining a channel state information reference signal (CSI-RS) resource configuration for the TP, wherein the obtaining comprises:
- obtaining a first CSI-RS resource configuration for the first TP indicating resources that the first TP is configured to use to transmit a first CSI-RS;
- and
- obtaining a second CSI-RS resource configuration for the second TP indicating resources that the second TP is configured to use to transmit a second CSI-RS;
- receiving a CSI-RS from each one of the N TPs, wherein receiving a CSI-RS from each one of the N TPs comprises:
- receiving the first CSI-RS transmitted by the first TP;
- and
- receiving the second CSI-RS transmitted by the second TP;
- generating a CSI report based on an aggregation of the N CSI-RS resource configurations;
- and
- transmitting the CSI report to a base station, wherein
- N=2, and
- generating a CSI report based on an aggregation of the N CSI-RS resource configurations comprises:
- the UE obtaining a first precoder matrix indicator (PMI) based on a measurement of the first CSI-RS and the second CSI-RS;
- the UE obtaining a second PMI, based on a measurement of the first CSI-RS and the second CSI-RS;
- the UE aggregating the first PMI and the second PMI, thereby generating an aggregated PMI;
- and
- the UE generating the CSI report based on the aggregated PMI.
15 more elements
A user equipment (UE), the UE being adapted to perform a method comprising:
- for each transmission point (TP) included in a selected set of N TPs, where N≥2 such that the set of N TPs includes at least a first TP and a second TP, obtaining a channel state information reference signal (CSI-RS) resource configuration for the TP, thereby obtaining N CSI-RS resource configurations, wherein the N CSI-RS resource configurations comprise:
- a first CSI-RS resource configuration for the first TP indicating resources that the first TP is configured to use to transmit a first CSI-RS;
- and
- a second CSI-RS resource configuration for the second TP indicating resources that the second TP is configured to use to transmit a second CSI-RS;
- receiving a CSI-RS from each one of the N TPs, wherein receiving a CSI-RS from each one of the N TPs comprises:
- receiving the first CSR-RS transmitted by the first TP;
- and
- receiving the second CSR-RS transmitted by the second TP;
- generating a CSI report based on an aggregation of the N CSI-RS resource configurations;
- and
- transmitting the CSI report to a base station, wherein
- N=2, and
- generating a CSI report based on an aggregation of the N CSI-RS resource configurations comprises:
- the UE obtaining a first precoder matrix indicator, PMI, based on a measurement of the first CSI-RS and the second CSI-RS;
- the UE obtaining a second PMI, based on a measurement of the first CSI-RS and the second CSI-RS;
- the UE aggregating the first PMI and the second PMI, thereby generating an aggregated PMI;
- and
- the UE generating the CSI report based on the aggregated PMI.
15 more elements
A user equipment (UE), the UE being adapted to perform a method comprising:
- for each transmission point (TP) included in a selected set of N TPs, where N≥2 such that the set of N TPs includes at least a first TP and a second TP, obtaining a channel state information reference signal (CSI-RS) resource configuration for the TP, thereby obtaining N CSI-RS resource configurations, wherein the N CSI-RS resource configurations comprise:
- a first CSI-RS resource configuration for the first TP indicating resources that the first TP is configured to use to transmit a first CSI-RS;
- and
- a second CSI-RS resource configuration for the second TP indicating resources that the second TP is configured to use to transmit a second CSI-RS;
- receiving a CSI-RS from each one of the N TPs, wherein receiving a CSI-RS from each one of the N TPs comprises:
- receiving the first CSR-RS transmitted by the first TP;
- and
- receiving the second CSR-RS transmitted by the second TP;
- generating a CSI report based on an aggregation of the N CSI-RS resource configurations;
- and
- transmitting the CSI report to a base station, wherein
- generating the CSI report based on an aggregation of the N CSI-RS resource configurations comprises:
- the UE generating a first channel estimate, H1, based on a measurement of the first CSI-RS;
- the UE generating a second channel estimate, H2, based on a measurement of the second CSI-RS;
- the UE using H1 and H2 to produce an aggregated channel estimate;
- and
- the UE generating the CSI report based on the aggregated channel estimate (H).
14 more elements
Dependencies are inferred from the claim text.