Terminal Device Network Selection for Satellite Legal Compliance
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Solution Overview
Problem
In Non Terrestrial Network (NTN) technology, satellite communication systems face challenges in network selection due to wide coverage areas where a single satellite may cover multiple regions without corresponding ground receiving stations, potentially violating legal monitoring requirements if the wrong network is selected for communication.
Innovation Solution
A method for network selection in terminal devices that determines current location information and selects candidate network information from a set indicating available Public Land Mobile Networks (PLMNs) for satellite communication, ensuring compliance with legal monitoring requirements by choosing an appropriate network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a single satellite covers multiple areas, then the coverage area is improved, but the risk of violating legal monitoring requirements increases when the wrong network is selected
Solution Approach 1:
The patent applies local quality by making the network selection dependent on the terminal's specific location. Different areas have different candidate PLMN sets configured based on local legal monitoring requirements. When the terminal determines its location information, it selects the appropriate candidate PLMNs from the configured sets that match its current area, ensuring that network selection adapts to local regulatory requirements while maintaining wide satellite coverage.
2Ease of operation
If network selection is performed without location-specific considerations, then the operation simplicity is improved, but the legal monitoring requirements may be violated
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple candidate PLMN sets in the terminal device, where each set corresponds to different geographic areas and their respective legal monitoring requirements. Before the terminal needs to select a network, the appropriate candidate PLMN sets are already prepared and stored. When location information is obtained, the terminal can quickly match its current area with the pre-configured sets and select from the appropriate candidate PLMNs, maintaining operational simplicity while ensuring legal compliance.
3Measurement precision
If the terminal device selects from multiple candidate PLMNs based on location, then the network selection accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the candidate PLMN configurations into multiple separate sets, where each set is associated with a specific geographic area. Instead of having one large complex configuration, the candidate PLMNs are segmented into area-specific groups. The terminal device determines its location information and selects from the corresponding segmented set, which simplifies the selection process while improving accuracy compared to selecting from a single undifferentiated list.
Data Source
AI summary
A method for network selection, a terminal device and a network device are provided. The method comprises the following operations. A current first location information of the terminal device is determined. A candidate network information corresponding to the current first location information is selected from a candidate network information set, and the candidate network information set includes correspondences between pieces of first location information and pieces of candidate network information, and the candidate network information indicates at least one candidate public land mobile network (PLMN) for satellite communication. Network selection is performed according to the candidate network information corresponding to the current first location information.