Wireless Mobility Handling for NTN Cell Reselection Priority

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently managing mobility handling between terrestrial and non-terrestrial networks, particularly in scenarios where a large number of user equipment (UEs) need to be transitioned due to satellite movement, leading to inefficiencies and resource consumption.

Innovation Solution

Implementing a wireless communication method that prioritizes cell reselection and handover procedures by transmitting cell reselection information and group identifications, adjusting measurement timing configurations, and using priority offsets to guide UEs towards specific network types, thereby optimizing the selection of cells within NTN or TN networks.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If individual UE handling is performed for each UE during mobility transitions, then mobility management accuracy is improved, but signaling overhead and network resource consumption increase significantly

Engineering Contradiction:

Improvemobility management accuracyVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent merges individual UE mobility handling into group-based handling by introducing a group ID that identifies multiple UEs experiencing similar mobility conditions. Instead of processing each UE separately, the network transmits unified mobility management information (such as cell reselection priorities and handover parameters) to all UEs in the same group, thereby maintaining mobility management accuracy while significantly reducing signaling overhead.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The group ID serves multiple functions: it identifies a cohort of UEs with similar mobility characteristics, enables bulk transmission of mobility management parameters, and allows the network to efficiently manage large numbers of UEs during satellite movement scenarios. This universal grouping mechanism replaces the need for individual UE processing across multiple network functions.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Productivity

If cell reselection information is transmitted to all UEs, then mobility handling efficiency is improved, but network resource consumption increases

Engineering Contradiction:

Improvemobility handling efficiencyVSAvoidnetwork resource consumption

Core Design Contradiction:

ProductivityVSLoss of energy

Solution Approach 1:

The patent segments the UE population into distinct groups based on their mobility characteristics and service requirements. By assigning different group IDs to different UE cohorts, the network can transmit cell reselection information selectively to specific groups rather than broadcasting to all UEs universally. This segmentation enables efficient mobility handling for each group while optimizing network resource consumption by avoiding unnecessary transmissions to UEs that do not require such information.

Inventive Principle:

Principle #1Segmentation

3Adaptability or versatility

If satellite movement is accommodated through traditional terrestrial mobility management, then network compatibility is maintained, but mobility handling performance deteriorates

Engineering Contradiction:

Improvenetwork compatibilityVSAvoidmobility handling performance

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The patent introduces dynamic mobility management parameters specifically tailored for satellite networks, including adjustable cell reselection priorities, handover thresholds, and timing configurations that account for satellite movement patterns. These dynamic parameters allow the network to adapt to the unique characteristics of NTN while maintaining compatibility with existing terrestrial network protocols and procedures.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent modifies key mobility management parameters such as cell reselection priority offsets, measurement timing configurations, and handover trigger thresholds to optimize performance for satellite networks. By changing these parameters from their default terrestrial values to NTN-optimized values, the system achieves improved mobility handling performance while maintaining structural compatibility with existing network architectures.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250344113A1Wireless communication method for mobility handling

Publication Date: 2025.11.06 ZTE CORP

AI summary

Mobility handling with wireless communication for use in a wireless terminal may include receiving, from a wireless network node, cell reselection information, and prioritizing at least one first cell of a first network type for selecting a cell for a cell reselection procedure based on the cell reselection information.