On-Demand Mobility Measurement Resource Allocation

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Solution Overview

Problem

Current wireless communication systems, particularly in 5G NR, face challenges with handover failures due to inadequate measurement reports and delayed or missed mobility commands, leading to increased latency, power consumption, and signaling overhead, especially during bandwidth part switching.

Innovation Solution

The implementation of network-assisted on-demand reference signal transmission/activation and duplication of mobility signaling, allowing for dynamic allocation of mobility measurement resources and timer adaptations to improve handover success rates and reduce unnecessary bandwidth part switching.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If measurement resources are allocated for all UEs, then measurement accuracy is improved, but signaling overhead increases

Engineering Contradiction:

Improvemeasurement accuracyVSAvoidsignaling overhead

Core Design Contradiction:

Measurement precisionVSLoss of information

Solution Approach 1:

The patent segments measurement resource allocation by UE mobility state. High-mobility UEs receive continuous measurement resources while low-mobility UEs receive on-demand resources, dividing the resource allocation strategy into distinct segments based on mobility characteristics

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent changes the parameter of measurement resource allocation from static (all UEs receive same resources) to dynamic (resources adjusted based on mobility state and measurement requirements), optimizing both measurement accuracy and signaling overhead

Inventive Principle:

Principle #35Parameter changes

2Reliability

If mobility commands are transmitted frequently, then handover reliability is improved, but power consumption increases

Engineering Contradiction:

Improvehandover reliabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent changes the transmission parameters of mobility commands based on UE mobility state. High-mobility UEs receive more frequent commands with enhanced reliability, while low-mobility UEs receive fewer commands, reducing their power consumption

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements dynamic mobility command transmission where the frequency and reliability of commands adapt to current mobility conditions, transitioning from static to dynamic control based on real-time UE state

Inventive Principle:

Principle #15Dynamics

3Productivity

If bandwidth part switching is performed rapidly, then spectral efficiency is improved, but handover failures increase

Engineering Contradiction:

Improvespectral efficiencyVSAvoidhandover success rate

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies preliminary action by pre-configuring multiple bandwidth parts and preparing mobility commands in advance for high-mobility UEs, ensuring resources are ready before handover is needed, thus preventing failures during rapid switching

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent provides beforehand cushioning by allocating additional measurement resources and preparing contingency mobility commands in advance for high-mobility scenarios, creating a buffer that prevents handover failures during rapid bandwidth part switching

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Data Source

PatentUS20240179554A1NW assistance for measurement and mobility enhancement

Publication Date: 2024.05.30 QUALCOMM INC

AI summary

A method for wireless communication at a source node and related apparatus are provided. In the method, the source node receives a user equipment (UE) request for an on-demand allocation of mobility measurement resources or mobility reporting resources for a UE, and provides a configuration, allocation, or activation for the mobility measurement resources or the mobility reporting resources in response to the UE request.