Uplink MIMO Mode Switching via Base Station Interference Indication

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently managing uplink multiple input multiple output (MIMO) communications, particularly in switching between codebook-based (CB) and non-codebook-based (NCB) modes to optimize performance amidst interference.

Innovation Solution

A method and apparatus for wireless communication that allow a user equipment (UE) to receive an indication from a base station on whether to use CB or NCB for uplink MIMO communications, and to switch accordingly based on the indication, thereby optimizing performance by accounting for interference at the base station.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the system switches between CB and NCB modes to optimize performance, then communication efficiency is improved, but device complexity increases

Engineering Contradiction:

Improvecommunication efficiencyVSAvoiddevice complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent implements dynamic mode switching between CB and NCB based on real-time interference conditions. The base station determines interference levels and dynamically selects the appropriate MIMO mode, allowing the system to adapt to changing channel conditions and optimize communication efficiency while managing complexity through automated decision-making

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the operational parameter (MIMO mode) based on interference conditions. By monitoring interference levels and switching between CB and NCB modes accordingly, the system optimizes performance for different channel conditions without requiring complex manual configuration

Inventive Principle:

Principle #35Parameter changes

2Reliability

If the system uses dynamic mode switching, then communication reliability is improved, but processing resources are consumed

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidprocessing resources

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The base station autonomously determines interference conditions and selects the appropriate MIMO mode without requiring complex UE measurements or reporting. This self-service approach at the base station improves reliability by making informed mode selection while minimizing the processing burden on user equipment

Inventive Principle:

Principle #25Self-service

3Productivity

If the system selects appropriate MIMO mode based on interference, then communication efficiency is improved, but signaling overhead increases

Engineering Contradiction:

Improvecommunication efficiencyVSAvoidsignaling overhead

Core Design Contradiction:

ProductivityVSLoss of information

Solution Approach 1:

The patent extracts the mode selection decision-making function to the base station, eliminating the need for extensive UE measurements and reporting. By centralizing the decision at the base station which has direct access to interference information, the system achieves efficient mode selection with minimal signaling overhead between UE and base station

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS12237892B2Uplink mode switching

Publication Date: 2025.02.25 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of whether an uplink multiple input multiple output (MIMO) communication is to be codebook-based (CB) or non-codebook-based (NCB). The UE may transmit the uplink MIMO communication as CB or NCB based at least in part on the indication. Numerous other aspects are described.