Location Area Update Triggering for Moving LEO Satellite Cells
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Solution Overview
Problem
The frequent location area updates and high signaling overheads caused by moving Low Earth Orbit Satellites (LEO) in non-terrestrial communication systems lead to unnecessary power consumption and network burden, particularly in satellite-based communication networks.
Innovation Solution
A method and apparatus for reducing location area updates by using a location area mapping relationship to compare tag values and location area lists, determining whether to trigger an update based on overlap and distance criteria, and optimizing paging procedures to ensure successful communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If location area update procedure is performed frequently to ensure accurate location tracking in moving satellite coverage, then location accuracy is improved, but terminal power consumption increases and signaling overhead increases
Solution Approach 1:
The patent introduces a time threshold parameter to control location area update triggering. By comparing the actual time since the terminal entered idle state against this threshold, the system dynamically determines whether to perform location area update, thereby reducing unnecessary updates and saving terminal power while maintaining acceptable location accuracy.
Solution Approach 2:
The patent applies partial action by selectively performing location area update only when necessary (when time threshold is exceeded), rather than performing it at every cell reselection. This partial execution of the update procedure reduces signaling overhead and power consumption while still maintaining sufficient location tracking accuracy.
2Measurement precision
If location area update procedure is performed frequently to ensure accurate location tracking in moving satellite coverage, then location accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent introduces a time threshold parameter to control location area update triggering. By comparing the actual time since the terminal entered idle state against this threshold, the system dynamically determines whether to perform location area update, thereby reducing unnecessary updates and saving terminal power while maintaining acceptable location accuracy.
Solution Approach 2:
The patent applies partial action by selectively performing location area update only when necessary (when time threshold is exceeded), rather than performing it at every cell reselection. This partial execution of the update procedure reduces signaling overhead and power consumption while still maintaining sufficient location tracking accuracy.
3Reliability
If cell reselection is performed in moving satellite coverage, then coverage continuity is improved, but location area update is frequently triggered causing power consumption increase
Solution Approach 1:
The patent performs preliminary action by storing the time when the terminal entered idle state before cell reselection occurs. This pre-stored time information enables subsequent comparison to determine whether location area update is truly necessary, preventing premature or unnecessary updates that would consume terminal power while ensuring coverage continuity through normal cell reselection.
Solution Approach 2:
The patent introduces a time threshold parameter to control location area update triggering. By comparing the actual time since the terminal entered idle state against this threshold, the system dynamically determines whether to perform location area update, thereby reducing unnecessary updates and saving terminal power while maintaining acceptable location accuracy.
Data Source
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AI summary
Disclosed in the present disclosure are a location area update method and apparatus, a method and apparatus for triggering a location area update, a method and apparatus for paging a location area update, and a device and a storage medium. The method for triggering a location area update comprises: acquiring from a location area mapping relationship a tag value of a target cell, a tag value of the current cell and a location area list of the current cell, wherein the target cell is a cell where a terminal resides when being in an idle state most recently, and the location area mapping relationship comprises a mapping relationship between a location area list of a cell and a tag value of the cell; acquiring a general location area list, which is stored corresponding to the target cell, wherein the general location area list is obtained by means of performing detection when the terminal is in the idle state most recently; comparing the general location area list with the location area list of the current cell, and comparing the tag value of the current cell with the tag value of the target cell, so as to obtain comparison results; and according to the comparison results, determining whether to trigger a location area update procedure.