Conditional 5G Mobility Configuration for Joint Cell Switching
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Solution Overview
Problem
Existing 5G NR mobility enhancement technologies face challenges in efficiently implementing joint configurations of conditional handover (CHO), conditional primary/secondary cell addition/change (CPAC), and layer 1 or layer 2 triggered mobility (L1/L2-triggered mobility), leading to increased latency and signaling overhead, particularly in scenarios involving frequent handovers.
Innovation Solution
A method and apparatus for conditional mobility configuration that enables associative storage of mobility configurations for master cell group (MCG)/primary cell (PCell) and secondary cell group (SCG)/primary secondary cell (PSCell), allowing simultaneous execution of mobility operations by a terminal, including joint configuration and inter-network negotiation to obtain measurement configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conditional handover and conditional PSCell addition/change are configured separately, then configuration complexity is reduced, but mobility execution efficiency deteriorates due to sequential processing
Solution Approach 1:
The patent combines conditional handover configuration and conditional PSCell addition/change configuration into a single joint configuration message. The network device sends both configurations together, allowing the terminal to process and execute both mobility operations simultaneously rather than sequentially, thereby improving mobility execution efficiency while maintaining manageable configuration complexity through unified processing.
Solution Approach 2:
The patent enables the terminal to perform preliminary processing of both conditional handover and conditional PSCell addition/change configurations upon receiving them jointly. The terminal can evaluate execution conditions and prepare for simultaneous execution of both mobility operations, reducing the time required when conditions are met and improving overall mobility execution efficiency.
2Ease of operation
If mobility operations are executed sequentially, then configuration simplicity is maintained, but latency increases due to waiting for initial operations to complete
Solution Approach 1:
The patent merges the execution of conditional handover and conditional PSCell addition/change into a simultaneous operation. By receiving and processing both configurations together, the terminal can execute both mobility operations at the same time when their respective conditions are met, significantly reducing latency compared to sequential execution while maintaining configuration simplicity through unified joint configuration messaging.
3Reliability
If joint configuration of multiple mobility enhancements is implemented, then mobility performance is improved, but signaling overhead increases
Solution Approach 1:
The patent combines multiple mobility enhancement configurations (conditional handover and conditional PSCell addition/change) into a single joint configuration message sent from the network to the terminal. This merging approach improves mobility performance by enabling simultaneous execution of multiple operations while reducing signaling overhead compared to sending separate configuration messages for each mobility enhancement.
Data Source
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AI summary
The present application relates to the field of mobile communications. Disclosed are a condition-based mobility configuration method and apparatus, a device and a storage medium. The method comprises: receiving a condition-based mobility configuration sent by a network device, wherein the condition-based mobility configuration comprises a first mobility configuration and a second mobility configuration, with the first mobility configuration being a configuration for master cell group (MCG)/primary cell (PCell) mobility, and the second mobility configuration being a configuration for secondary cell group (SCG)/primary secondary cell (PSCell) mobility; and performing associated storage on the first mobility configuration corresponding to a candidate MCG/PCell and the second mobility configuration corresponding to a candidate SCG/PSCell. By means of the present application, a terminal can determine a second mobility configuration corresponding to different candidate SCGs/PSCells without the need for executing a mobility operation of a first mobility configuration.