Satellite Directional Reporting for Inter-Satellite Interference Suppression
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Solution Overview
Problem
Conventional terrestrial mobile communication networks provide limited global coverage, and multi-satellite coordinated transmission in satellite communication systems face significant inter-satellite interference, degrading system performance due to inter-subcarrier interference.
Innovation Solution
Introduce a new measurement parameter, reference signal received directional cosine (RSRDC), based on elevation and azimuth angles, to suppress inter-satellite interference and improve multi-satellite non-coherent joint transmission performance by enabling direction information measurement and resource-efficient reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-satellite coordinated transmission is implemented, then system capacity and coverage are improved, but inter-satellite interference increases
Solution Approach 1:
The patent applies local quality by making different satellites transmit using different directional parameters (elevation angles and azimuths) tailored to their specific geometric relationships with the terminal. Each satellite's transmission characteristics are optimized locally based on its position, rather than using a uniform approach across all satellites. This allows the system to maintain high capacity while reducing interference through localized parameter optimization.
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting directional parameters (elevation angles and azimuths) for each satellite based on terminal location and satellite geometry. The terminal reports measured directional parameters back to the network, which then optimizes transmission parameters accordingly. This parameter optimization resolves the contradiction by finding the right balance between utilizing multiple satellites for high capacity and adjusting their parameters to minimize inter-satellite interference.
2Reliability
If directional parameters are measured and reported for each satellite, then inter-satellite interference is suppressed, but measurement and reporting complexity increases
Solution Approach 1:
The patent applies preliminary action by having the terminal pre-measure and report directional parameters (elevation angles and azimuths) for multiple satellites before actual multi-satellite transmission begins. The terminal also pre-calculates reference signal received directional cosine (RSRDC) values for candidate satellites. This advance preparation allows the network to select optimal satellite combinations and configure transmission parameters efficiently, reducing real-time complexity while maintaining reliable interference suppression.
3Ease of manufacture
If conventional terrestrial mobile communication network is used, then manufacturing cost is reduced, but global coverage capability is limited
Solution Approach 1:
The patent implements merging by combining terrestrial mobile communication networks with satellite communication networks into a unified non-terrestrial network (NTN) system. The terminal can communicate with both terrestrial base stations and satellites, with the network intelligently selecting or coordinating between different network types. This hybrid approach maintains the cost advantages of terrestrial infrastructure while adding the global coverage capabilities of satellites, resolving the contradiction between manufacturing cost and coverage area.
Data Source
Figure 1A~1B
Figure 2
Figure 3~4
AI summary
Embodiments of this disclosure provide a communication method, apparatus, and system, a computer-readable storage medium, and a computer program product. In the method, a terminal apparatus obtains a first directional parameter, where the first directional parameter is determined based on a first elevation angle and a first azimuth of a line of sight path from a first network apparatus to the terminal apparatus; the terminal apparatus further obtains a second directional parameter, where the second directional parameter is determined based on a second elevation angle and a second azimuth of a line of sight path from a second network apparatus to the terminal apparatus; and the terminal apparatus reports the first directional parameter and the second directional parameter to the first network apparatus. In this way, inter-satellite interference can be suppressed and multi-satellite non-coherent joint transmission performance can be improved in embodiments of this disclosure.