Terminal Resource Switching Across Satellite Beam Coverage Areas
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Solution Overview
Problem
In satellite communication, co-channel interference and interference between different satellites covering the same position on the ground are addressed by using different frequency domain resources for different beam coverage areas and signaling/data beams, but efficient switching methods for terminals to adapt to these changes are lacking.
Innovation Solution
A switching method for terminals that involves receiving indication signaling to switch to target communication resources, including frequency spectrum and beam directions, facilitated by network devices using RRC or multiple coordinated signalings to manage transitions between beam coverage areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If different beam coverage areas use different beams and frequency domain resources to avoid co-channel interference, then interference is reduced, but device complexity increases due to the need for resource switching
Solution Approach 1:
The terminal performs measurements on reference signals (SSB or CSI-RS) in advance to obtain signal quality information of neighboring beams before switching is needed. This preliminary measurement allows the network to make informed switching decisions without requiring complex real-time measurements during the switching process itself.
Solution Approach 2:
The patent introduces indication signaling as an intermediary that carries target resource information from the network to the terminal. This signaling mechanism simplifies the switching process by providing pre-determined target resources, eliminating the need for complex terminal-side resource selection and reduction.
2Reliability
If the terminal switches between different frequency spectrum resources and beam directions to track satellite movement, then communication continuity is maintained, but loss of time occurs during the switching process
Solution Approach 1:
The network determines target frequency spectrum resources and beam directions in advance based on terminal measurements and satellite movement predictions. This preliminary determination allows the terminal to switch directly to pre-calculated resources without performing complex real-time searches, significantly reducing switching time while maintaining communication continuity.
Solution Approach 2:
The terminal provides measurement feedback (signal quality information) to the network, which uses this feedback to determine optimal target resources. This feedback mechanism ensures that switching decisions are based on actual channel conditions, maintaining reliability while the network handles the computational complexity of determining target resources.
3Measurement precision
If the network determines target resources based on terminal measurements, then measurement precision is improved, but loss of time occurs during the measurement and reporting process
Solution Approach 1:
The terminal performs measurements on reference signals in advance and reports measurement results to the network before switching is required. This preliminary measurement approach allows the network to have accurate channel information available when making switching decisions, improving measurement precision while the timing is optimized so measurements are completed beforehand rather than during the switching moment.
Data Source
AI summary
A switching method is performed by a terminal, and includes: receiving an indication signaling, wherein the indication signaling is configured to indicate a target communication resource; and switching to the target communication resource from a service communication resource based on the indication signaling.