DCI Alignment for Multi-Panel Uplink MIMO SRS Selection

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Solution Overview

Problem

In wireless communication systems with UEs having heterogeneous antenna groups, the size of uplink DCI fields varies based on which group of antennas is scheduled for transmission, leading to increased complexity and power consumption due to blind detection.

Innovation Solution

UEs determine configurations for first and second SRS sets based on their antenna groups and calculate the size of the DCI field accordingly, allowing for alignment and eliminating the need for blind decoding by using padding bits to indicate the selected SRS set.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the UE uses blind detection to determine the DCI field size for different antenna groups, then the system can support heterogeneous antenna configurations, but the detection complexity and power consumption increase

Engineering Contradiction:

Improvesupport for heterogeneous antenna configurationsVSAvoiddetection complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by having the UE pre-determine the DCI field size based on configured SRS sets before actual transmission. The UE calculates the required field size in advance based on the antenna group configuration and uses padding bits to ensure consistent DCI structure, eliminating the need for blind detection during transmission.

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If the UE uses blind detection to determine the DCI field size, then the system can adapt to different antenna groups, but the power consumption increases

Engineering Contradiction:

Improveadaptability to different antenna groupsVSAvoidpower consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

3Productivity

If the DCI field size varies based on scheduled antenna groups, then the system can efficiently allocate resources, but the alignment complexity increases

Engineering Contradiction:

Improveresource allocation efficiencyVSAvoidalignment complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent applies parameter changes by standardizing the DCI field size parameter across all antenna group configurations. Instead of varying the field size to match different antenna groups, the patent uses padding bits to maintain a consistent maximum field size, thereby simplifying alignment while preserving resource allocation efficiency.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP4098054B1Downlink control information alignment for multi-panel uplink multiple-input multiple-output transmission

Publication Date: 2026.03.18 QUALCOMM INC

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AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may determine a first configuration for a first sounding reference signal (SRS) set and a second configuration for a second SRS set, the first SRS set to be transmitted using a first group of antennas of the UE and the second SRS set to be transmitted using a second group of antennas of the UE; determine a size of a downlink control information (DCI) field to be included in an uplink DCI communication scheduling a physical uplink shared channel (PUSCH) transmission, the DCI field to indicate a selected SRS set; receive the uplink DCI communication scheduling the PUSCH transmission; and identify the selected SRS set based at least in part on the determined size of the DCI field and information carried in the DCI field. Numerous other aspects are provided.