Terminal Mobility Control via Source Secondary Base Station Maintenance
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Solution Overview
Problem
Current mobile communication systems experience significant data transmission interruptions and delays during handover processes, particularly when a terminal moves from one base station to another, leading to degraded service quality and reliability.
Innovation Solution
A method and device for controlling terminal mobility by maintaining data transmission and reception with a source secondary base station until a specific point in time, then transitioning to a target secondary base station through controlled random access procedures, reducing interruptions and delays during handover and secondary base station changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a terminal performs a random access procedure to resume data transmission and reception during handover, then the terminal can successfully migrate to a new base station, but data transmissions are interrupted for a significant length of time
Solution Approach 1:
The source secondary base station maintains data transmission and reception with the terminal until a specific point in time during the handover process, rather than immediately releasing the connection. This preliminary maintenance of the connection allows the terminal to complete the random access procedure to the target base station without interruption, thereby reducing data transmission interruption time while ensuring handover success
Solution Approach 2:
The patent extends the data transmission and reception operation with the source secondary base station to a specific point in time during handover, ensuring continuous data flow. This continuity prevents gaps in data transmission that would otherwise occur during the handover transition, thereby reducing overall interruption time while maintaining reliable connection migration
2Adaptability or versatility
If a terminal releases a secondary base station to perform a secondary base station change, then the terminal can transition to a new secondary base station, but data transmission interruption continues for a significant length of time
Solution Approach 1:
The source secondary base station is configured to maintain data transmission and reception operations until a specific point in time during the secondary base station change process. This preliminary maintenance ensures that the terminal can establish connection with the target secondary base station without experiencing data transmission interruptions, thereby reducing interruption duration while enabling smooth base station switching
Solution Approach 2:
The patent introduces a specific point in time as an intermediary mechanism that coordinates the release of the source secondary base station with the establishment of connection to the target secondary base station. This intermediary timing mechanism ensures that data transmission is maintained during the transition period, preventing interruptions while enabling versatile base station switching
Data Source
AI summary
Provided are a method and device for controlling mobility, which reduce a delay or service interruption occurring in a handover process of a terminal. The method of a terminal may include receiving an RRC connection reconfiguration message including mobility control information from a master eNB; controlling data transmission to or data reception from a source secondary eNB to be maintained up to a specific point of time on the basis of the mobility control information; and transmitting a random access channel (RACH) for performing a random access procedure to a target secondary eNB.