UE Mobility Optimization via Validity Information Filtering
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Solution Overview
Problem
Current wireless communication systems face challenges in optimizing mobility procedures, leading to potential mobility failures due to incorrect cell selections and inefficiencies in signaling, particularly in scenarios requiring conditional mobility.
Innovation Solution
A method and apparatus for user equipment (UE) in wireless communication systems that receive mobility commands and validity information, allowing for optimized mobility by releasing invalid commands and maintaining valid ones, enabling seamless transitions between target cells without additional signaling for neighbor cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network provides multiple mobility commands for conditional mobility, then the UE has more cell selection options and mobility reliability improves, but the complexity of managing multiple commands and validity information increases
Solution Approach 1:
The patent segments mobility commands into valid and invalid categories based on validity information, allowing the UE to process only relevant commands after a mobility event occurs. This segmentation reduces the complexity of managing multiple commands by filtering out obsolete ones.
Solution Approach 2:
The network provides validity information in advance about which mobility commands will be valid after a potential mobility event. This preliminary action allows the UE to prepare and manage commands efficiently, knowing which ones need to be maintained and which can be released.
2Loss of time
If the UE performs mobility procedures sequentially, then the signaling overhead is reduced, but the mobility preparation time increases and system capacity is underutilized
Solution Approach 1:
The network performs preliminary actions by providing multiple mobility commands and validity information in advance, allowing the UE to prepare target cells before actual mobility is needed. This reduces the preparation time when mobility events occur.
Solution Approach 2:
The validity information acts as feedback from the network about which mobility commands remain valid after a mobility event. This feedback mechanism allows the UE to efficiently manage command validity without complex signaling procedures.
3Measurement precision
If the network provides detailed validity information for each mobility command, then the mobility accuracy and cell selection correctness improve, but the signaling overhead and information processing load increase
Solution Approach 1:
The patent applies local quality by providing validity information specifically for each mobility command rather than a blanket valid/invalid status. This allows precise cell selection accuracy while managing signaling overhead by only transmitting necessary validity information.
Solution Approach 2:
The network changes the parameter of command validity status based on mobility events and network conditions. This dynamic parameter change allows the system to maintain high cell selection accuracy while adapting the information transmission to actual needs.
Data Source
AI summary
The present disclosure relates to a mobility enhancement in wireless communications. According to an embodiment of the present disclosure, a user equipment (UE) may perform an optimized mobility based on validity information informing which cells/mobility commands are valid for the optimized mobility. Therefore, the UE may identify one or more cells among all neighbor cells in a cell list to which optimized mobility is possible without receiving an additional signaling for the cell list, and prevent mobility failure caused by a mobility to a wrong cell.