Satellite Access Point Interference Mitigation
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Solution Overview
Problem
Interference occurs between satellite networks and terrestrial cellular networks when a user equipment (UE) uses a satellite network while a terrestrial network is available, leading to inefficient use of dedicated frequency bands and potential service disruptions.
Innovation Solution
An extraterrestrial access point detects the presence of a terrestrial access point within a geographical area and determines if it is covered by a terrestrial network using a dataset of terrestrial access points, then ceases transmissions to avoid interference by switching off the satellite network in areas with adequate terrestrial coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If satellite networks transmit signals in dedicated frequency bands to provide coverage in remote areas, then global access and remote coverage are improved, but interference occurs when terrestrial networks are available in the same areas
Solution Approach 1:
The satellite access point performs preliminary detection of terrestrial access points before transmitting signals. By detecting the presence of terrestrial networks in advance using reference signals and datasets, the satellite network可以避免 transmitting in areas where terrestrial coverage exists, thus preventing interference before it occurs.
Solution Approach 2:
The satellite network applies different transmission behaviors to different geographical areas. In areas with terrestrial coverage, satellite transmissions are ceased or restricted, while in remote areas without terrestrial coverage, satellite transmissions are maintained. This localized quality control resolves the contradiction by adapting transmission behavior to local conditions.
2Reliability
If satellite networks use dedicated frequency bands for all transmissions, then reliable communication in remote areas is ensured, but frequency resources are wasted in areas with sufficient terrestrial coverage
Solution Approach 1:
Instead of transmitting satellite signals universally across all areas, the system applies partial action by restricting transmissions only to areas where terrestrial coverage is insufficient. The satellite network performs selective transmissions based on detected terrestrial access point locations, using dedicated frequency bands only when necessary for remote coverage, thus avoiding resource waste while maintaining reliability where needed.
Solution Approach 2:
The transmission parameters of the satellite network are dynamically changed based on the presence or absence of terrestrial networks. When terrestrial access points are detected, the satellite network changes its transmission state from active to ceased in those specific geographical areas, optimizing frequency resource utilization while maintaining communication reliability in remote areas.
3Adaptability or versatility
If satellite networks provide service in areas with terrestrial coverage, then global access is improved, but service disruptions occur due to interference between networks
Solution Approach 1:
The satellite access point performs preliminary detection of terrestrial networks before providing service in any given area. By detecting terrestrial access points and determining their coverage areas in advance, the satellite network can adaptively decide where to provide service, ensuring global access capability while avoiding service disruptions caused by interference in areas with terrestrial coverage.
Data Source
AI summary
Methods for mitigating interference between satellite networks and terrestrial cellular networks are provided. Interference may occur when a UE uses an extraterrestrial network when a terrestrial network is available. A method of mitigating interference between an extraterrestrial network and a terrestrial network begins with detecting, by an extraterrestrial access point, that at least one terrestrial access point located within a first geographical area is attempting to communicate with the extraterrestrial access point. The extraterrestrial access point then determines that the first geographical area is covered by at least one terrestrial network. The determining that the first geographical area is covered by at least one terrestrial network may use a dataset of terrestrial network access points. Once the first geographical area has been determined to be covered by at least one terrestrial network, the extraterrestrial access point ceases transmissions to the first geographical network.