Dual Connectivity Data Preprocessing for 5G Handover
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Solution Overview
Problem
In next-generation mobile communication systems, data preprocessing is challenging in dual connectivity scenarios using a split bearer, as data pre-processing cannot be performed before transmission resource allocation, leading to difficulties in handover processes.
Innovation Solution
A method involving a first base station transmitting handover requests to a second base station, allowing for switching between Primary Cells (PCell) and Primary Secondary Cells (PSCell), and releasing connections based on predetermined conditions, enabling data preprocessing and minimizing communication cuts during handover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data preprocessing is performed after PDCP entity determines RLC entities for split bearer in dual connectivity, then transmission resource allocation can be optimized, but data processing speed is reduced due to delayed preprocessing
Solution Approach 1:
The patent performs data preprocessing at the MAC layer before the PDCP entity determines which RLC entities will transmit the data packets. By pre-generating multiple candidate PDCP PDUs and storing them in advance, the system eliminates the need to wait for resource allocation decisions during handover, thus resolving the contradiction between preprocessing timing and processing speed
2Productivity
If transmission resources are allocated before data preprocessing in dual connectivity, then data processing efficiency is improved, but resource allocation complexity increases
Solution Approach 1:
The patent segments the data processing into distinct stages: MAC layer preprocessing generates multiple candidate PDCP PDUs, then PDCP layer selects appropriate candidates based on resource allocation outcomes. This segmentation allows resource allocation to occur after preprocessing without requiring the allocator to consider all possible preprocessing outcomes, thus improving efficiency while managing complexity
3Reliability
If handover configuration information is transferred during dual connectivity switching, then connection reliability is improved, but communication interruptions increase due to processing delays
Solution Approach 1:
The patent prepares configuration information and candidate data packets in advance at the source base station before handover is triggered. When handover occurs, the target base station already has the necessary configuration information ready, allowing immediate resumption of communication without waiting for configuration transfer during the switching process
Solution Approach 2:
The patent uses the MAC layer as an intermediary that buffers and manages candidate PDCP PDUs during the handover transition. This intermediary layer allows the system to maintain data availability while configuration information is being transferred between base stations, reducing communication interruptions
Data Source
AI summary
Disclose are: a communication technique for merging, with IoT technology, a 5G communication system for supporting a data transmission rate higher than that of a 4G system; and a system therefor. The present disclosure can be applied to an intelligent service (for example, smart home, smart building, smart city, smart car or connected car, health care, digital education, retail, security and safety-related services, and the like) on the basis of a 5G communication technology and an IoT-related technology. One embodiment of the present invention relates to a method and a device for accelerating data processing of a double connection in a next generation mobile communication system.