AMF Reachability Reporting with Maximum Availability Time
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Solution Overview
Problem
Current communication systems face challenges in efficiently delivering messages to devices in power saving modes, as existing UE reachability reports do not provide information on the duration a device remains available after waking up, leading to unpredictable message delivery for multiple UEs with buffered data or SMS.
Innovation Solution
Implementing a method where network nodes detect a terminal device's status change from unreachable to reachable and send reports containing the maximum availability time based on power saving configurations, such as extended connected time, active time, and periodic registration timer control, allowing service consumers to prioritize message delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If extended idle mode DRX is used to reduce power consumption, then energy efficiency is improved, but message delivery reliability deteriorates due to unpredictable availability duration
Solution Approach 1:
The patent introduces an intermediary information element (maximum availability time) that bridges the gap between the UE's power saving state and the network's message delivery needs. This intermediary parameter allows the network to predict when the UE will be available without forcing the UE to remain continuously connected, thus maintaining both power efficiency and delivery reliability.
Solution Approach 2:
The patent applies preliminary action by having the UE notify the network in advance about its maximum availability time before actually becoming unreachable. This allows the network to proactively schedule message deliveries within the known availability window, ensuring reliable delivery while the UE maintains power-saving behavior.
2Use of energy by moving object
If extended idle mode DRX with long cycle values is used, then power saving is improved, but service responsiveness deteriorates due to delayed message delivery
Solution Approach 1:
The patent introduces dynamics by allowing the maximum availability time parameter to be flexibly adjusted based on the specific DRX configuration and UE state. Instead of a fixed waiting period, the network can adaptively determine the availability window based on the negotiated DRX parameters, enabling optimal balance between power saving and response time for different scenarios.
3Device complexity
If multiple UEs with buffered data are handled without availability time information, then system complexity is reduced, but message delivery efficiency deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the message delivery process into distinct phases based on the maximum availability time parameter. The network can segment UEs into different availability categories and handle message routing accordingly, allowing efficient batch processing while maintaining individual UE timing requirements. This segmented approach improves throughput without requiring complex individual handling of each UE.
Data Source
AI summary
Methods and apparatuses for event reporting are disclosed. According to an embodiment, an access and mobility management function (AMF) entity detects a status of a terminal device changing from unreachable to reachable and sends, to a first entity, a report indicating that the terminal device is reachable. The report contains a maximum availability time until which the terminal device is expected to be reachable.