UE Beam Parameter Switching for CSI-RS and Data Reception

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Solution Overview

Problem

In massive MIMO systems, the alignment of beam indicators for Channel State Information Reference Signals (CSI-RS) and data transmission can cause confusion when they are frequency-domain multiplexed on the same multicarrier symbol, leading to uncertainty in beam selection for the UE.

Innovation Solution

A method for determining spatial receiving parameters by using first and second information to differentiate between CSI-RS and data reception, where the second parameter is used if the time-domain resource of the second radio signal includes the first time interval, otherwise the first parameter is used.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If beam indicators for CSI-RS and data transmission are indicated respectively, then beamforming precision is improved, but beam indicator alignment deteriorates causing UE confusion

Engineering Contradiction:

Improvebeamforming precisionVSAvoidbeam indicator alignment

Core Design Contradiction:

Measurement precisionVSLoss of information

Solution Approach 1:

The patent combines the beam indicator indication for CSI-RS and data transmission into a single unified indication mechanism. When CSI-RS and data are frequency-domain multiplexed on the same multicarrier symbol, a single beam indicator is used to indicate the beam for both signals, eliminating the confusion caused by separate indications while maintaining beamforming precision through proper resource allocation.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent introduces dynamic beam indicator allocation based on the time-domain resource relationship between CSI-RS and data. The beam indicator selection dynamically adapts to whether the signals share the same multicarrier symbol, allowing the system to switch between unified and separate indication modes according to the actual resource allocation scenario.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If separate beam indicators are used for CSI-RS and data, then beam scheduling flexibility is improved, but signaling overhead increases

Engineering Contradiction:

Improvebeam scheduling flexibilityVSAvoidsignaling overhead

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The patent merges the beam indicator signaling for CSI-RS and data transmission into a single indication when the signals are frequency-domain multiplexed on the same multicarrier symbol. This reduces the number of beam indicators that need to be transmitted, thereby reducing signaling overhead while maintaining the ability to schedule different beams for different resource allocations through the unified indication mechanism.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12526781B2Method and device in UE and base station used for wireless communication

Publication Date: 2026.01.13 APOGEE NETWORKS LLC

AI summary

The disclosure provides a method and a device in a User Equipment (UE) and a base station used for wireless communication. The UE receives first information and second information, and receives a first radio signal in a first time interval. The first information and the second information are used for determining a first parameter and a second parameter respectively, the first parameter and the second parameter are used for multi-antenna related receptions respectively; the second parameter is used for a reception of a second radio signal; if a time-domain resource occupied by the second radio signal comprises the first time interval, the second parameter is used for a reception of the first radio signal, otherwise, the first parameter is used for a reception of the first radio signal. The disclosure can solve the conflict of beam scheduling and increase the flexibility of beam scheduling.