Satellite PLMN Selection by Location for Policy Compliance
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Solution Overview
Problem
In satellite networks, the public land mobile network (PLMN) selected by user equipment (UE) may not be consistent with its geographical location, leading to non-compliance with policy supervision and lawful interception requirements.
Innovation Solution
A network selection method where the terminal device selects a corresponding PLMN based on its location and a pre-configured selection priority list, ensuring that the selected PLMN of the satellite network matches the UE's location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the satellite network provides coverage over multiple countries, then the coverage area is improved, but the PLMN selection consistency with user location deteriorates
Solution Approach 1:
The patent segments the satellite network service by introducing location-based PLMN selection. The network is divided into multiple PLMNs corresponding to different geographical regions (countries), and the UE selects the appropriate PLMN based on its current location. This segmentation resolves the contradiction by maintaining broad satellite coverage while ensuring accurate PLMN selection matching the user's location.
Solution Approach 2:
The patent applies preliminary action by pre-configuring multiple PLMNs in the UE and pre-determining the correspondence between locations and PLMNs. Before the UE needs to connect to the network, it already has the necessary PLMN information stored, and the network provides assistance information in advance to help the UE quickly select the correct PLMN based on its location, thus ensuring both wide coverage and accurate selection.
2Ease of operation
If the UE automatically selects available satellite networks, then the ease of operation is improved, but the compliance with policy supervision deteriorates
Solution Approach 1:
The patent implements feedback mechanisms where the network provides assistance information to the UE about location-PLMN correspondence, and the UE uses this feedback to make informed PLMN selection decisions. The network also receives registration requests from the UE and can verify whether the selected PLMN is appropriate, creating a feedback loop that ensures both ease of operation and policy compliance.
Solution Approach 2:
The patent introduces location information as an intermediary element between the UE and PLMN selection. Instead of directly connecting to any available satellite network, the UE uses location information (obtained from GPS or network-provided assistance) as a mediator to determine which PLMN to select. This intermediary ensures automated operation while maintaining compliance with regional policies.
3Adaptability or versatility
If the satellite covers multiple regions, then the versatility of the network is improved, but the difficulty of detecting and measuring user location deteriorates
Solution Approach 1:
The patent applies universality by making the PLMN selection mechanism applicable across multiple regions and countries. The same basic mechanism of location-based PLMN selection works universally whether the UE is in one country or another, and whether the satellite covers one or multiple regions. The network provides universal assistance information that enables the UE to correctly select PLMNs regardless of location, thus maintaining versatility without increasing location detection difficulty.
Data Source
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AI summary
The embodiments of the present application relate to a network selection method, a terminal device and a network device. Said method comprises: in a preset condition, a terminal device selecting, according to the location of the terminal device and a priority selection list, a public land mobile network (PLMN) of a satellite network corresponding to the location of the terminal device. The embodiments of the present application can make the location of a UE be within a PLMN of a satellite network selected by the UE.