Conditional Handover Cell Preparation Optimization
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Solution Overview
Problem
Wireless communication systems face inefficiencies in conditional handover and primary secondary cell change procedures, leading to unnecessary target cell preparations, which waste resources and increase the risk of radio link failures due to the decoupling of handover preparation and execution phases.
Innovation Solution
An apparatus and method that determine and store information on the number of cells prepared and preparation activities for conditional handovers or primary secondary cell changes, allowing for optimization through Mobility Robustness Optimization (MRO) schemes to balance unnecessary preparations and timely handovers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conditional handover preparation is decoupled from execution to relax timing accuracy, then handover timing precision is improved, but the number of unnecessary target cell preparations increases
Solution Approach 1:
The patent implements a feedback mechanism where the network device receives information from the terminal device about the number of prepared cells and preparation activities. This feedback is used to evaluate and adjust handover parameters, reducing unnecessary preparations in future handovers. The terminal device counts prepared cells and reports this information back to the network, creating a closed-loop system that optimizes handover performance over time.
Solution Approach 2:
The terminal device autonomously performs the counting of prepared cells and preparation activities without requiring network intervention for each individual count. The device self-manages the measurement and reporting process, reducing signaling overhead while providing the network with necessary optimization data.
2Reliability
If the number of target cells prepared for conditional handover is increased, then handover reliability is improved, but resource consumption increases
Solution Approach 1:
The patent changes the parameter being monitored from binary (handover success/failure) to quantitative (number of prepared cells, number of preparation activities). This enables the network to evaluate handover performance in terms of resource consumption and adjust preparation strategies accordingly, balancing reliability with resource efficiency through data-driven parameter optimization.
3Adaptability or versatility
If measurement and reporting of preparation activities is implemented, then handover optimization capability is improved, but system complexity increases
Solution Approach 1:
The patent leverages existing measurement and reporting mechanisms in the terminal device to serve multiple functions: standard handover execution, preparation counting, and optimization feedback. By making the measurement system multi-functional, the patent avoids adding separate complex infrastructure while still enabling sophisticated handover optimization through the existing communication and processing channels.
Data Source
AI summary
An apparatus comprising at least one processor, and at least one memory storing instructions, the at least one memory and the instructions configured to, with the at least one processor, cause a network device to determine a first information characterizing at least one of a) a number of cells prepared for a conditional handover or a conditional primary secondary cell change of a terminal device, b) a number of preparation activities associated with the conditional handover or the conditional primary secondary cell change of the terminal device.