DAPS Fallback Configuration for 5G Handover Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Next-generation mobile communication systems face challenges in ensuring seamless handovers without data interruption and providing efficient fallback mechanisms when handovers fail, leading to potential service disruptions.
Innovation Solution
The implementation of a method that involves configuring dual active protocol stack (DAPS) bearers, where a terminal or base station establishes signaling radio bearers and packet data convergence protocol (PDCP) layer devices with synchronized configurations between source and target cell groups, allowing for seamless handovers and quick fallback to the source base station if necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If DAPS handover is implemented to enable seamless handover without data transmission/reception interruption, then data continuity is improved, but device complexity increases due to dual active protocol stack configuration
Solution Approach 1:
The patent segments the protocol stack into dual active configurations, allowing separate protocol instances to operate independently for source and target base stations. This segmentation enables seamless handover by maintaining independent protocol paths that can be switched without interruption, directly resolving the contradiction between reliability and complexity.
Solution Approach 2:
The patent implements preliminary configuration of fallback mechanisms and dual protocol stacks before handover occurs. By pre-configuring the fallback bearer and maintaining dual active states in advance, the system prepares for potential handover failures, ensuring data continuity while managing complexity through advance preparation rather than reactive measures.
2Reliability
If fallback mechanism is configured for each bearer to enable quick recovery from handover failure, then service reliability is improved, but device complexity increases due to additional configuration overhead
Solution Approach 1:
The patent applies local quality by configuring fallback mechanisms specifically for each bearer individually rather than globally. Each bearer can have its own fallback configuration tailored to its specific requirements, allowing selective application of complexity only where needed. This approach improves service reliability for critical bearers while avoiding unnecessary complexity for less critical ones.
Solution Approach 2:
The patent implements dynamic fallback configuration where the fallback bearer can be activated or deactivated based on handover success. The system dynamically adjusts the configuration state - maintaining dual active protocols during handover and switching to single active state upon successful completion. This dynamic approach optimizes the balance between reliability and complexity by adapting configuration to actual operational needs.
Data Source
AI summary
The disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The disclosure relates to a method and an apparatus for performing fallback when handover fails in a case where efficient handover without interruption of transmission or reception of data during handover is performed.