Wireless Handover via Dual Connectivity and Make-Before-Break
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Solution Overview
Problem
Current wireless communication systems face inefficiencies and reliability issues during handover procedures, particularly when a user equipment (UE) struggles to establish or maintain a connection with a target base station, leading to radio link failures and interruptions.
Innovation Solution
The implementation of advanced handover techniques that allow a UE to maintain a primary connection while establishing a secondary connection with a target base station using dual connectivity or make-before-break methods, enabling zero or almost zero millisecond handovers and improved channel condition measurements for seamless transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a UE releases the first connection with the source base station and establishes a second connection with the target base station during handover, then the handover procedure is completed, but radio link failures and connection interruptions occur
Solution Approach 1:
The patent applies preliminary action by establishing the second connection with the target base station before releasing the first connection with the source base station. This 'make-before-break' approach ensures that a new connection is ready before the old one is terminated, preventing connection gaps and radio link failures during handover.
Solution Approach 2:
The patent maintains continuous connectivity by keeping the first connection active until the second connection is successfully established. This ensures uninterrupted communication throughout the handover process, eliminating service interruptions and maintaining continuous useful action during the transition.
2Reliability
If a UE maintains the first connection while establishing the second connection during handover, then connection continuity is improved, but handover complexity increases
Solution Approach 1:
The patent segments the handover procedure into distinct phases: connection establishment phase where the second connection is created while the first remains active, and connection transition phase where roles are switched. This segmentation allows for controlled management of multiple connections without overwhelming complexity.
Solution Approach 2:
The patent uses the source base station as an intermediary that coordinates the handover process, managing the transition from first to second connection. This intermediary role simplifies the UE's task by centralizing control logic in the network side, reducing device complexity while maintaining connection continuity.
3Productivity
If a UE performs measurements and role switches during handover, then handover optimization is achieved, but processing overhead increases
Solution Approach 1:
The patent implements feedback mechanisms where the UE performs measurements of signal quality and provides this information to the base station, which then makes intelligent decisions about role switches. This feedback-driven approach optimizes handover timing and reduces unnecessary processing, improving efficiency while controlling energy consumption.
Solution Approach 2:
The patent changes operational parameters dynamically during handover, such as switching the primary connection role from the first to the second connection based on measured signal conditions. These parameter changes are triggered only when necessary, optimizing handover efficiency while avoiding unnecessary processing and energy expenditure.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described that provide a handover may be performed based on one or more conditions at a UE and in conjunction with a handover procedure from a source base station to a target base station. The one or more conditions at the UE may be associated with successful establishment or maintenance of the second connection. In some cases, the one or more conditions at the UE may correspond to one or more measurements associated with the source base station, the target base station, one or more neighboring base stations, or any combinations thereof.