Non-Terrestrial UE Network Selection for Battery-Saving Priority Search
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
User equipment connected to non-terrestrial networks face repeated battery drain due to periodic network selection attempts, which can lead to registration with suboptimal networks, and existing solutions to switch off these attempts result in unwanted situations.
Innovation Solution
Implement a method for user equipment to perform network selection procedures based on priority information and time interval-related information stored in the subscriber identity module, allowing targeted selection of higher priority networks only when necessary, thereby saving power and avoiding suboptimal registrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If user equipment performs periodic network selection attempts while connected to non-terrestrial networks, then the equipment can potentially register with higher priority networks, but the equipment experiences repeated battery drain
Solution Approach 1:
The patent applies dynamics by making the network selection behavior adaptive rather than static. The user equipment dynamically adjusts whether to perform periodic network selection attempts based on the type of network currently connected to. When connected to terrestrial networks, normal periodic selection is performed. When connected to non-terrestrial networks, periodic selection is suspended. This dynamic adjustment resolves the contradiction by optimizing energy consumption while maintaining reliable network registration according to network conditions.
Solution Approach 2:
The patent changes the parameter of network selection frequency based on network type. By detecting whether the current network is terrestrial or non-terrestrial, the equipment modifies its network selection behavior parameter - performing selections on terrestrial networks but suppressing them on non-terrestrial networks. This parameter change resolves the contradiction between maintaining registration quality and reducing battery drain.
2Use of energy by moving object
If user equipment switches off periodic network selection attempts to save power, then battery life is preserved, but the equipment may register with suboptimal networks
Solution Approach 1:
The patent applies local quality by applying different network selection strategies to different network types. Instead of a uniform approach, the equipment treats terrestrial and non-terrestrial networks differently. For non-terrestrial networks where periodic selection causes excessive battery drain, the equipment locally suspends selection attempts. For terrestrial networks, normal selection continues. This localized differentiation resolves the contradiction by preserving battery life where needed while maintaining registration quality where appropriate.
Solution Approach 2:
The patent implements feedback by continuously monitoring the current network type and adjusting network selection behavior accordingly. The equipment detects whether it is connected to a terrestrial or non-terrestrial network and uses this feedback to determine whether to perform or suppress periodic network selection attempts. This feedback mechanism resolves the contradiction by ensuring battery preservation on non-terrestrial networks while maintaining proper network registration on terrestrial networks.
3Reliability
If user equipment performs network selection procedures frequently, then higher priority networks can be selected, but the time interval for network operations increases
Solution Approach 1:
The patent applies periodic action selectively based on network type. For terrestrial networks, the equipment performs periodic network selection attempts at standard intervals to ensure optimal network registration. For non-terrestrial networks, the equipment suspends periodic selection attempts, effectively changing the period to infinity. This selective periodic action resolves the contradiction between selecting higher priority networks and minimizing operation time by applying periodic selection only where it provides benefit.
Data Source
Figure 1~3
Figure 4
AI summary
The invention relates to a method for using a user equipment in or with a non-terrestrial mobile communication network and/or that uses a non-terrestrial radio access technology, wherein the user equipment is provided with a priority information regarding the mobile communication network and/or the radio access technology, wherein - in case that the priority information, regarding the mobile communication network used by the user equipment and/or regarding the radio access technology used by the user equipment, indicates a sufficiently low priority of the mobile communication network used by the user equipment and/or a sufficiently low priority of the radio access technology used by the user equipment - the user equipment is configured to perform a network selection procedure to select a higher priority mobile communication network and/or to select a higher priority radio access technology, wherein the user equipment comprises a subscriber identity module entity realizing the functionality of a subscriber identity module, wherein the subscriber identity module entity comprises a time interval-related information such that the time interval, to be applied by the user equipment to perform the network selection procedure for a higher prioritized mobile communication network and/or for a higher priority radio access technology, depends on the time interval-related information stored in the subscriber identity module entity, wherein the method comprises the following steps: -- in a first step, the user equipment uses the non-terrestrial mobile communication network and/or the non-terrestrial radio access technology, -- in a second step, the user equipment performs the network selection procedure, to select a higher priority mobile communication network and/or to select a higher priority radio access technology, in a manner applying the time interval-related information, wherein the time interval-related information is exclusively applied in case that the user equipment uses -- the non-terrestrial mobile communication network or a non-terrestrial mobile communication network, and/or -- the non-terrestrial radio access technology or a non-terrestrial radio access technology.