Base Station Device Dual-Cell Handover Mechanism
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Solution Overview
Problem
In LTE-Advanced systems, communication disconnections between mobile terminal devices and base station networks occur when the communication quality of the primary cell deteriorates, leading to prolonged reconnection times and disruptions in service.
Innovation Solution
A communications system that allows simultaneous C-Plane and U-Plane data transmission via both primary and secondary cells, enabling seamless handover between macro and small cell base stations based on communication quality thresholds, thereby reducing disconnections and improving network stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile terminal device connects to a primary base station device for C-Plane communication, then connection management is established, but communication disconnection occurs when the primary cell quality deteriorates
Solution Approach 1:
The system performs preliminary actions by establishing both C-Plane and U-Plane connections to the primary base station and simultaneously maintaining connections to secondary base stations before quality deterioration occurs. When the primary cell quality deteriorates, the system can immediately switch to pre-established secondary connections, avoiding the need for time-consuming reconnection procedures.
Solution Approach 2:
The invention implements beforehand cushioning by creating redundant connection paths to secondary base stations before the primary connection fails. These backup connections act as a cushion that prevents complete communication disconnection when the primary cell quality deteriorates, ensuring continuous service availability.
2Productivity
If the system uses carrier aggregation with multiple base station devices, then frequency utilization efficiency improves, but communication disconnection occurs when primary cell quality deteriorates
Solution Approach 1:
The system segments the communication functions by separating C-Plane (control plane) and U-Plane (user plane) communications across different base station devices. The primary base station handles C-Plane communication while secondary base stations handle U-Plane communication, allowing the system to maintain control functions even when user plane connections need to be reestablished.
Solution Approach 2:
The system dynamically changes connection parameters by switching which base station devices handle C-Plane and U-Plane communications based on cell quality conditions. When primary cell quality deteriorates, the system changes the active set configuration and modifies which base stations are used for different plane communications, maintaining overall connection stability.
3Reliability
If the mobile terminal device maintains connections to multiple base station devices, then service continuity improves, but system complexity increases
Solution Approach 1:
The system implements dynamic connection management where the active set of base station devices is continuously adjusted based on communication quality conditions. The system dynamically adds or removes base stations from the active set while maintaining coordinated communication, allowing service continuity without requiring permanently complex multi-base station configurations.
Data Source
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AI summary
A terminal device includes: a wireless communication unit that performs wireless communication; a connection control unit that connects to a first base station device so as to be able to wirelessly communicate with the first base station device via the wireless communication unit, the first base station serving as a primary, the connection control unit connecting to a second base station device so as to be able to wirelessly communicate with the second base station device via the wireless communication unit, the second base station device serving as a secondary; a detection unit that determines whether quality of wireless communication between the terminal device and the first base station device is in a low state based on a predetermined condition; and a signal transmission control unit that wirelessly transmits via the wireless communication unit, a predetermined signal toward at least either the first or second base station device when the quality is determined to be in the low state by the detection unit.