Ephemeris Broadcast Priority for Non-Terrestrial Uplink Efficiency
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Solution Overview
Problem
Existing 5G wireless communication systems face challenges in managing varying resource demands and latency requirements for mobile devices, particularly in non-terrestrial networks, where ephemeris information delivery is not optimized for different quality-of-service classes, leading to inefficiencies and potential interference with uplink traffic.
Innovation Solution
A method is introduced where a non-terrestrial radio network node assigns priority to ephemeris system information blocks based on parameter changes, transmitting this priority to user equipment to optimize ephemeris information reception, thereby reducing interference with uplink traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ephemeris information is delivered frequently to ensure up-to-date positioning data, then positioning accuracy is improved, but interference with uplink traffic increases
Solution Approach 1:
The system enables user equipment to autonomously determine whether to receive ephemeris information by evaluating priority indicators and parameter change values, eliminating the need for frequent network-controlled transmissions and reducing uplink interference
Solution Approach 2:
The patent introduces priority indicators and parameter change values as new parameters to control ephemeris information delivery, allowing the system to adapt transmission frequency based on actual needs rather than using fixed frequent updates
2Reliability
If ephemeris information is delivered to all user equipment uniformly, then positioning reliability is improved, but network resource consumption increases
Solution Approach 1:
The system applies different priority levels and delivery strategies to different user equipment based on their specific service requirements and conditions, rather than uniform treatment, optimizing resource allocation for each device
Solution Approach 2:
The patent implements selective ephemeris information delivery where only certain user equipment receive certain ephemeris messages based on priority criteria, avoiding unnecessary transmissions to all devices
3Productivity
If system information block priority indication is transmitted to enable selective reception, then uplink traffic efficiency is improved, but device complexity increases
Solution Approach 1:
The system pre-configures priority indicators and parameter change thresholds in user equipment, enabling devices to make autonomous reception decisions without complex real-time processing, thereby improving uplink efficiency without significantly increasing device complexity
Data Source
AI summary
A non-terrestrial radio network node receives, and transmits to a user equipment, ephemeris system information block priority configuration information. The non-terrestrial node determines parameter value change(s) corresponding to an upcoming ephemeris system information block occasion group with respect to a previous/preceding occasion group. The non-terrestrial node assigns, and transmits to the user equipment, an assigned priority, corresponding to the upcoming group, that is based on the determined parameter value change(s) or a rate of change corresponding thereto. From the priority configuration information, the user equipment determines a worst-case parameter value(s) of parameter range(s) corresponding to the assigned priority. The user equipment may determine to avoid receiving updated ephemeris information via an upcoming group occasion if the worst-case parameter value(s) does/do not exceed a configured corresponding asynchronization criterion and may instead transmit uplink traffic during upcoming group occasions.