Silent Detachment of Low Mobility Users in Wireless Networks
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Solution Overview
Problem
Current network architectures face challenges in managing network resources efficiently, particularly with Machine-to-Machine (M2M) devices that often remain in an idle mode and unnecessarily consume resources due to their synchronized requests, leading to potential network overload and increased costs.
Innovation Solution
A method and node configuration for identifying and detaching low mobility users from the wireless network by removing their Packet Data Network (PDN) connection without signaling, utilizing timer mechanisms, mobility patterns, and information from Policy and Charging Rules Function nodes to optimize resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If M2M devices are kept connected to the network to ensure immediate access, then network service availability is improved, but network resource consumption increases
Solution Approach 1:
The network side proactively detaches low mobility UEs before they actually need network resources, based on predetermined mobility criteria and timer mechanisms. This preliminary detachment prevents unnecessary resource consumption while maintaining the ability to quickly reattach when needed, thus improving resource efficiency without significantly compromising service availability.
Solution Approach 2:
The system automatically identifies and detaches low mobility UEs without requiring user intervention or complex signaling. The network monitors mobility patterns and autonomously makes detachment decisions based on predefined criteria, reducing both resource consumption and signaling overhead while maintaining service availability when needed.
2Measurement precision
If all UEs are monitored for mobility to determine detachment eligibility, then detachment accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent applies different mobility monitoring and detachment strategies to different types of UEs based on their specific characteristics. Low mobility UEs are subjected to simplified monitoring using timer mechanisms and basic location updates, while other UEs receive full monitoring. This localized approach improves detachment accuracy for the target group without increasing overall signaling overhead.
Solution Approach 2:
Instead of implementing complete mobility monitoring for all UEs, the system applies partial monitoring specifically tailored to low mobility UEs using simplified criteria such as timer mechanisms and basic tracking area updates. This partial action approach achieves sufficient detachment accuracy for the target group while minimizing signaling overhead across the entire network.
3Productivity
If PDN connections are removed without signaling to the UE, then network resource optimization is improved, but connection reliability deteriorates
Solution Approach 1:
The patent converts the potential harm of silent detachment (UE unaware of disconnection) into a benefit by implementing robust reattachment mechanisms. When UEs attempt to use network resources after silent detachment, they automatically reattach, and the network quickly restores their connections. This approach optimizes resource usage by removing unnecessary connections while maintaining reliability through automatic recovery, turning the initial 'harm' of silent detachment into a beneficial resource optimization strategy.
Data Source
AI summary
Example embodiments presented herein are directed towards a system and method for detachment in wireless communication systems. Some example embodiments are directed towards detaching a user from a wireless communications network without providing any signaling towards the user.