Handover Without Data Suspension in 5G Mobile Systems
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Solution Overview
Problem
Next generation mobile communication systems face challenges in maintaining data transmission continuity during handovers, leading to potential data interruptions and increased transmission delays.
Innovation Solution
The implementation of efficient handover methods that allow for seamless data transmission and reception by maintaining multiple bearers and performing random access procedures through secondary MAC entities, ensuring that data transmission is uninterrupted during the handover process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional handover method is used, then handover process is completed, but data transmission is interrupted during handover
Solution Approach 1:
The UE performs random access procedure to the target base station before completing the handover process. By initiating the random access procedure in advance while maintaining the connection with the source base station, the UE prepares the data transmission path to the target base station beforehand, eliminating data interruption during handover.
Solution Approach 2:
The UE maintains data transmission with the source base station through the first MAC entity while simultaneously performing random access procedure with the target base station through the second MAC entity. This parallel operation ensures continuous data transmission without interruption during the handover process.
2Reliability
If random access procedure is performed before handover completion, then data transmission continuity is improved, but MAC entity management complexity increases
Solution Approach 1:
The UE maintains two separate MAC entities: a first MAC entity for managing data transmission with the source base station and a second MAC entity for managing the random access procedure with the target base station. This segmentation allows independent management of each base station connection, simplifying the overall management complexity while enabling continuous data transmission.
Data Source
AI summary
The present disclosure relates to a communication technique which combines a 5G communication system, for supporting a higher data transmission rate than 4G systems, with IoT technology, and a system for same. The present invention may be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, health care, digital education, smart retailers, security and safety-related services, or the like) based on 5G communication technology and IoT-related technology. The present disclosure relates to a method and device for performing an efficient handover, without the suspension of data transmission and reception, upon handover in a next generation mobile communication system.