Satellite Cell Identifier Update for Handover Conflict Resolution
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Solution Overview
Problem
In large-scale satellite communication systems, the issue of cell identifier confusion or conflict between neighboring cells arises due to overlapping coverage areas and movement of low-orbit earth satellites, leading to handover failures as network devices cannot distinguish between cells with the same physical cell identifier (PCI).
Innovation Solution
A communication method that involves updating the identification information of cells, such as their physical cell identifier, frequency, or polarization direction, before they become neighboring cells, allowing network devices to differentiate between them and prevent conflicts. This information is communicated to terminal devices through configuration updates, ensuring accurate handovers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a large-scale constellation of low-orbit earth satellites is deployed to provide extensive satellite-to-ground communication service, then the coverage area and service availability are improved, but cell identifier confusion and conflict between neighboring cells occur
Solution Approach 1:
The network device predicts future neighboring cell relationships based on satellite movement trajectories and proactively updates cell identifiers before conflicts occur. This preliminary action prevents identifier confusion by anticipating when cells will become neighbors and adjusting identifiers in advance.
Solution Approach 2:
The patent implements dynamic cell identifier updates based on real-time satellite positions and predicted movements. Instead of static identifiers, the system continuously adapts cell identifiers to maintain uniqueness as satellites move and coverage areas change, resolving the contradiction between extensive coverage and identifier uniqueness.
2Reliability
If cell identifier updates are performed frequently to prevent conflicts, then cell identifier uniqueness is improved, but signaling overhead and system complexity increase
Solution Approach 1:
By predicting future neighboring relationships and performing updates in advance, the system reduces the frequency of reactive updates. This allows for more planned, batched configuration changes rather than continuous reactive modifications, reducing overall system complexity while maintaining uniqueness.
Solution Approach 2:
The network device monitors actual satellite positions and neighboring cell relationships, using this feedback to adjust update strategies. This feedback mechanism optimizes the timing and scope of identifier updates, preventing unnecessary complexity by updating only when and where conflicts are actually predicted to occur.
Data Source
AI summary
The present disclosure relates to communication methods and communication apparatuses. In one example method, a first communication apparatus receives first configuration information, where the first configuration information includes first identification update information and information about a first update moment of a first cell of a second communication apparatus, and the first identification update information is used to determine first identification information used by the first cell at the first update moment or after the first update moment. The first communication apparatus communicates based on the first configuration information by using the first identification information at the first update moment or after the first update moment, where the first communication apparatus is in a coverage range of the first cell.