Dual Connectivity Handover Configuration in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in determining optimal connection configurations and handling handovers for user equipment (UE) in dual connectivity scenarios, where UE connects to both macro and small base stations, leading to inefficiencies and potential handover failures due to differences in cell coverage and RRC message handling.
Innovation Solution
A method and apparatus that enable UE to detect handover events, select macro and small base stations with the highest signal strength, check for dynamic association, and determine connection configurations based on these selections, allowing for single or dual connectivity modes and informing the necessary information for connection switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dual connectivity is implemented to enable UE to connect to multiple base stations simultaneously, then service speed and coverage are improved, but connection configuration complexity and handover management difficulty increase
Solution Approach 1:
The patent segments the base station connection management into distinct phases: measurement phase (UE measures signal strength of multiple base stations), evaluation phase (system evaluates whether to establish dual connectivity), and execution phase (connection configuration is applied). This segmentation simplifies the overall complexity by breaking down the complex dual connectivity management into manageable, sequential steps.
Solution Approach 2:
The patent implements preliminary measurement and evaluation actions before establishing dual connectivity. The UE first measures signal strengths of potential base stations, and the system evaluates whether dual connectivity should be established based on these measurements and configured parameters. This preliminary action prevents unnecessary connection attempts and reduces configuration complexity by making informed decisions beforehand.
2Adaptability or versatility
If dynamic connection switching between single and dual connectivity modes is enabled, then adaptability to different scenarios is improved, but handover failure risk and system instability increase
Solution Approach 1:
The patent implements dynamic connection mode switching where the system can transition between single connectivity and dual connectivity modes based on real-time conditions. The UE continuously measures base station signal strengths, and when measurement results satisfy configured thresholds, the system dynamically switches connection modes. This dynamic approach maintains adaptability while controlling instability through configured evaluation criteria.
Solution Approach 2:
The patent employs feedback mechanisms where the UE reports measurement results to the network, and the network evaluates these reports against configured parameters to determine whether to switch connection modes. This closed-loop feedback system ensures that mode switching decisions are based on actual channel conditions, improving handover success rates while maintaining adaptability to changing environments.
3Manufacturing precision
If frequent measurement and evaluation of base stations is performed to optimize connection configuration, then connection optimality is improved, but signaling overhead and processing time increase
Solution Approach 1:
The patent implements periodic measurement and evaluation cycles where the UE measures base station signal strengths at regular intervals and reports to the network. The network performs evaluation at these periodic intervals based on configured thresholds and parameters. This periodic approach balances connection optimality with time efficiency, avoiding excessive measurements while maintaining adequate optimization.
Data Source
AI summary
Provided are a method and apparatus for determining connection configuration between a user equipment (UE) and a base station (ENB) and performing handover in a wireless communication system supporting dual connectivity. The method of setting a connection configuration for a UE in a wireless communication system supporting dual connectivity may include: detecting occurrence of a handover event; selecting a macro ENB with the highest signal strength among neighboring macro ENBs and a small ENB with the highest signal strength among neighboring small ENBs; checking whether dynamic association is allowed in dual connectivity; and determining the connection configuration for the UE on the basis of the selected ENBs and checking result.