Consecutive Conditional Handovers in High-Mobility Wireless Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in performing consecutive conditional handovers efficiently, particularly in high-speed, high-mobility, and high-density scenarios, leading to potential handover failures and data losses.
Innovation Solution
The system configures wireless devices with conditional handover information that supports multiple consecutive conditional handovers, allowing devices to perform handovers from one cell to another based on pre-configured conditions, thereby reducing reliance on in-time RRC signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional handover signaling is used in high-speed scenarios, then handover can be performed, but handover reliability deteriorates due to rapidly changing channel conditions causing signaling failures
Solution Approach 1:
The patent applies preliminary action by pre-configuring conditional handover information including target cell configurations and handover conditions before handover is needed. The wireless device stores this information and automatically executes handover when conditions are met, eliminating the need for real-time signaling during handover execution in high-speed scenarios.
2Reliability
If conditional handover information is provided for multiple cells, then handover reliability improves, but device complexity increases due to storing and managing multiple handover configurations
Solution Approach 1:
The patent applies self-service by enabling the wireless device to autonomously evaluate handover conditions and automatically execute handover to appropriate target cells based on pre-configured information. The device monitors its own connection quality and independently decides when to trigger handover without continuous network control, reducing the burden of managing multiple configurations.
3Productivity
If in-time handover signaling is used, then handover can be performed, but data losses occur due to vulnerable signaling in rapidly changing channel conditions
Solution Approach 1:
The patent eliminates data losses by pre-configuring complete handover information including target cell parameters and resource allocations before handover execution. The wireless device can immediately execute handover when conditions are met without waiting for network signaling, ensuring continuous data transmission even in rapidly changing channel conditions.
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
This disclosure relates to techniques for performing consecutive conditional handovers. A cellular base station may provide conditional handover information for multiple conditional handovers to a wireless device. The conditional handover information may include information for performing a conditional handover from a cell provided by the cellular base station to at least one cell, and information for performing a conditional handover from one or more of those cells to at least one cell. The wireless device may perform multiple consecutive conditional handovers using the conditional handover information.