CG-SDT Capability Reporting for Beam Correspondence Reuse

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Solution Overview

Problem

Terminal devices in a non-connected state do not support beam correspondence and cannot report their capability for beam correspondence in Configured Grant Small Data Transmission (CG-SDT) procedures, leading to inefficiencies in energy consumption and latency.

Innovation Solution

Terminal devices in a connected state transmit capability indication information to network-side devices, indicating support for beam correspondence in CG-SDT, allowing them to determine uplink transmission beams based on downlink reception beams without scanning, thereby reducing energy consumption and latency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If terminal devices in non-connected state perform uplink beam scanning for CG-SDT, then beam correspondence can be established, but energy consumption increases and latency increases

Engineering Contradiction:

Improvebeam correspondenceVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The terminal device performs beam scanning and determines the uplink transmission beam in advance when in connected state, before transitioning to non-connected state for CG-SDT. This preliminary action stores the beam information for later reuse, eliminating the need for scanning during SDT operations and thus reducing energy consumption while maintaining beam correspondence

Inventive Principle:

Principle #10Preliminary action

2Reliability

If terminal devices in non-connected state perform uplink beam scanning for CG-SDT, then beam correspondence can be established, but transmission latency increases

Engineering Contradiction:

Improvebeam correspondenceVSAvoidlatency

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The terminal device performs beam scanning and determines the uplink transmission beam in advance when in connected state, before transitioning to non-connected state for CG-SDT. This preliminary action stores the beam information for later reuse, eliminating the need for scanning during SDT operations and thus reducing transmission latency while maintaining beam correspondence

Inventive Principle:

Principle #10Preliminary action

3Productivity

If terminal devices report beam correspondence capability in connected state, then CG-SDT efficiency improves, but device complexity increases

Engineering Contradiction:

ImproveCG-SDT efficiencyVSAvoidcapability reporting

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The capability indication information is integrated into existing uplink messages such as RRC messages or uplink data transmissions. This multi-functional approach allows the terminal to report its beam correspondence capability without requiring separate dedicated signaling procedures, thus improving CG-SDT efficiency while minimizing additional device complexity

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20260046860A1Capability reporting method, device and storage medium

Publication Date: 2026.02.12 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

A capability reporting method is performed by a terminal device, and includes: transmitting, by the terminal device in a connected state, capability indication information to a network-side device, in which the capability indication information is configured indicate that the terminal device supports beam correspondence in a configured grant small data transmission (CG-SDT) procedure.