Seamless Handover via Pre-configured Path Resources in Non-Terrestrial Networks
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Solution Overview
Problem
In non-terrestrial networks, existing handover processes in communication systems are inefficient due to the uncertainty of terminal device movement trajectories, leading to resource wastage as multiple target cells are pre-configured but not optimally utilized, resulting in redundant measurement reports and resource allocation deletions.
Innovation Solution
A method where a network device configures resource allocations on multiple target cells along a predetermined path for a terminal device, allowing seamless handover by prioritizing cells based on their location and access levels, thereby avoiding redundant resource allocation and measurement reports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple target cells are pre-configured for handover in non-terrestrial networks, then handover coverage is improved, but resource wastage increases due to redundant resource allocation and measurement reports
Solution Approach 1:
The network device pre-configures resource allocations for multiple target cells along a predicted movement path before the terminal device actually needs to handover. This preliminary action includes allocating time-frequency resources and generating measurement configuration for future target cells, eliminating the need for reactive resource allocation and reducing waste from cells that wouldn't be needed.
Solution Approach 2:
The patent extracts only the necessary resource allocation information for cells along the predicted path, rather than configuring all possible target cells. By identifying and selecting only the relevant target cells based on movement trajectory prediction, the system removes redundant resource allocations and measurement configurations, reducing overall resource wastage while maintaining adequate handover coverage.
2Reliability
If resource allocations are configured for multiple target cells, then seamless handover is enabled, but system complexity increases due to resource allocation management
Solution Approach 1:
The patent segments the resource allocation management into distinct functional modules: movement trajectory prediction module, target cell identification module, resource allocation configuration module, and measurement configuration module. Each module handles a specific aspect of the handover preparation, making the overall complex process more manageable and maintainable through functional decomposition.
Solution Approach 2:
The network device acts as an intermediary that centralizes the management of resource allocations for multiple target cells. Rather than having terminal devices independently manage resources across cells, the network device coordinates and controls resource allocation, simplifying the terminal device's complexity while enabling seamless handover through centralized resource management.
3Measurement precision
If measurement configuration is provided for multiple target cells, then handover accuracy is improved, but loss of information increases due to redundant measurement reports
Solution Approach 1:
The patent applies local quality by providing measurement configuration specifically tailored to each target cell's relevance based on the terminal device's predicted movement path. Cells closer to the predicted path receive detailed measurement configuration, while cells farther away receive minimal or no configuration. This localized approach maintains high handover accuracy for relevant cells while avoiding redundant measurement reports for irrelevant cells.
Data Source
AI summary
Embodiments of the present application provide a wireless communication method, a terminal device and a network device. The network device configures resources located on a plurality of target cells on a preset path, so that the terminal device can realize, based on the resources on the plurality of target cells, seamless handover among the plurality of target cells on the preset path. The method includes: receiving, by a terminal device, first information, the first information including resource allocations on a plurality of target cells, and the plurality of target cells being located on a first path to be passed through by the terminal device.