Packet Redundancy for Seamless 5G Handover
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Solution Overview
Problem
There is a need for an efficient handover method in next-generation mobile communication systems that minimizes data interruption and prevents header decompression failures during handovers in both base stations and terminals.
Innovation Solution
The method involves configuring new protocol bearers at a user equipment (UE) to maintain data transmission with a source base station while establishing connections with a target base station, using duplicate data transmission to ensure seamless handover with no data loss, and employing specific procedures to handle header compression and decompression efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional handover methods are used in next-generation mobile communication systems, then the handover procedure can be completed, but data interruption occurs and header decompression failures may happen
Solution Approach 1:
The patent applies preliminary action by performing data duplication and header compression context transfer before the actual handover execution. The source base station sends duplicate data packets to the target base station in advance, and transfers the header compression context information beforehand, so that when handover occurs, the target base station already has all necessary data and context to immediately continue transmission without interruption or decomposition failures
Solution Approach 2:
The patent uses copying by creating duplicate copies of data packets at the source base station. These duplicate packets are sent through both the source and target base stations to the user equipment, ensuring that the user equipment receives continuous data flow during handover. The duplication mechanism guarantees that no data is lost during the transition between base stations
2Productivity
If header compression is used to reduce data overhead, then transmission efficiency improves, but header decompression failures occur during handover
Solution Approach 1:
The patent introduces an intermediary mechanism by transferring the header compression context information from the source base station to the target base station before handover. This context information acts as a mediator that enables the target base station to correctly decompress incoming packets. The patent also transfers initial context information as a backup intermediary to handle cases where the primary context transfer fails, ensuring reliable header decompression
Solution Approach 2:
The patent applies preliminary action by pre-transferring header compression context information and initial context information to the target base station before the handover occurs. This ensures that when the target base station receives compressed packets, it already has the necessary context to successfully decompress them, preventing header decompression failures
3Reliability
If data duplication is performed to ensure seamless handover, then service continuity is maintained, but transmission overhead increases
Solution Approach 1:
The patent applies local quality by selectively duplicating data packets only at the source base station for transmission to the target base station, rather than duplicating all traffic throughout the entire system. The duplication is localized to where it is most needed - at the handover boundary - minimizing overall system overhead while ensuring service continuity
Data Source
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AI summary
The present disclosure relates to a communication technique for combining an IoT technology with a 5G communication system for supporting a higher data rate than a beyond 4G system, and a system therefor. The present disclosure can be applied to an intelligent service (for example, a smart home, a smart building, a smart city, a smart car or connected car, health care, digital education, a retail business, a security and safety-related service, and the like) on the basis of a 5G communication technology and an IoT-related technology. In addition, the present disclosure relates to a packet redundancy processing method for supporting enhanced handover in a next generation mobile communication system, a method for preventing a header decompression failure during handover and an apparatus therefor.