Dual Active Protocol Stack Handover Bearer Management
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Solution Overview
Problem
Current dual active protocol stack (DAPS) handover mechanisms in wireless networks face challenges in efficiently managing bearer configurations and resources during handover processes, leading to potential service disruptions and inefficiencies.
Innovation Solution
The implementation of an apparatus and method that enables DAPS handover by receiving configuration information indicating bearers to be released, maintaining bearers during a random-access procedure with a target access node, and releasing them after the procedure, while allowing continued transmission and reception if handover fails, to ensure uninterrupted service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If bearers are released immediately during DAPS handover configuration, then resource management is simplified, but service continuity is disrupted
Solution Approach 1:
The patent applies preliminary action by maintaining bearers during the random-access procedure before handover completion. The source access node receives configuration information indicating bearers to be released, but delays the actual release until after the random-access procedure succeeds, ensuring service continuity while preparing for efficient resource management.
Solution Approach 2:
The patent implements dynamic bearer management where the state of bearers changes based on handover progress. Bearers are maintained dynamically during the random-access procedure and only released after successful handover completion, allowing the system to adapt resource allocation to current operational needs rather than following a static release schedule.
2Reliability
If bearers are maintained during random-access procedure, then service continuity is ensured, but resource management complexity increases
Solution Approach 1:
The patent extracts the bearer release operation from the initial handover configuration phase and separates it into a subsequent step after random-access procedure completion. This extraction allows the handover configuration to focus on establishing service continuity while the bearer release is handled as a distinct, later operation, reducing immediate management complexity.
Solution Approach 2:
The system uses feedback from the random-access procedure outcome to determine bearer release timing. The source access node monitors whether the random-access procedure succeeds or fails, and only releases bearers upon successful completion, creating a feedback-driven resource management mechanism that adapts to actual handover progress.
3Productivity
If bearers are released after handover failure, then resource allocation is optimized, but service disruption occurs
Solution Approach 1:
The patent applies preliminary anti-action by maintaining bearers during the random-access procedure to prevent service disruption. This proactive measure ensures that even if handover fails, the bearers remain active and service continuity is preserved, counteracting potential service interruption before it can occur.
Solution Approach 2:
The system provides beforehand cushioning by keeping bearers active as a safety buffer during the handover process. This cushioning mechanism ensures that if the handover fails, there is already an active bearer configuration in place to maintain service, rather than requiring re-establishment of bearers after failure.
Data Source
AI summary
An apparatus comprising at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to perform: enabling dual active protocol stack, DAPS, handover, comprising: receiving DAPS handover configuration information comprising information indicating one or more bearers that are to be released; and maintaining the one or more bearers during a random-access procedure with a target access node.