DAPS Handover Bearer Protocol Switching for 5G UE
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Solution Overview
Problem
Current wireless communication systems face challenges in performing handover efficiently without interrupting data transmission, particularly in 5G networks, which are essential for supporting low latency and high-capacity communications in IoT environments.
Innovation Solution
The method involves user equipment (UE) switching between bearers during handover by performing uplink data transmission using a second bearer protocol and discontinuing downlink data reception from the source base station, allowing seamless data transmission and reception with a target base station, utilizing a Dual Active Protocol Stack (DAPS) handover method to minimize data interruption time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional handover method is used, then handover process is simple, but data transmission is interrupted during handover
Solution Approach 1:
The patent establishes a second bearer protocol stack in advance before handover occurs. This preliminary preparation allows the UE to switch to the pre-configured second bearer immediately when handover is needed, eliminating data transmission interruptions without requiring complex real-time protocol switching mechanisms
Solution Approach 2:
The patent divides the bearer protocol into two separate protocol stacks (first bearer and second bearer), allowing independent operation and switching between them. This segmentation enables seamless transition during handover by maintaining one active protocol stack while the other is prepared or deactivated, ensuring continuous data transmission
2Reliability
If data transmission is maintained during handover, then service continuity is improved, but transmission latency increases
Solution Approach 1:
The second bearer protocol stack is configured and prepared in advance before handover execution. This preliminary action ensures that when handover occurs, the UE can immediately switch to the pre-prepared second bearer without waiting for protocol establishment, thus maintaining service continuity while minimizing transmission latency
Solution Approach 2:
The patent maintains data transmission continuity by keeping the first bearer active during handover preparation and seamlessly switching to the second bearer when handover executes. This continuous operation of data transmission through protocol switching ensures service continuity without significant latency interruption
3Reliability
If bearer switching is performed during handover, then data interruption is minimized, but protocol management complexity increases
Solution Approach 1:
The second bearer protocol stack is pre-configured with all necessary parameters and settings before handover. This preliminary configuration simplifies the switching process during handover, as the UE only needs to activate the pre-prepared second bearer without performing complex real-time protocol negotiations or configurations
Solution Approach 2:
The patent introduces a bearer protocol stack as an intermediary layer between the UE and the network. This intermediary structure allows systematic management of handover by providing a standardized interface for switching between source and target base stations, simplifying overall protocol management despite the complexity of bearer switching
Data Source
AI summary
The present disclosure relates to a method and apparatus for performing handover in a wireless communication system. According to a method for performing a handover according to an embodiment of the present disclosure, a user equipment (UE) perform data transmission/reception with a source base station for each bearer, perform uplink data transmission by switching to a protocol of a second bearer from a protocol layer entity of a first bearer in case that a preset first condition is satisfied; and in case that a preset second condition is satisfied, stop downlink data reception from the source base station through the protocol layer entity of the first bearer, and perform data transmission/reception with a target base station.