User Equipment Detachment and Triggering for MTC
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Solution Overview
Problem
In machine-to-machine communications, the high number of MTC UEs poses a challenge due to increased network resources and signaling, with existing solutions like CBS and MBMS being costly and requiring modifications to LTE devices, necessitating a method to minimize network activity while allowing device triggering without modifying existing 3GPP specifications.
Innovation Solution
A method where the UE is detached from the network locally by the network without signaling, preventing periodic location updates by setting a very long or infinite timer expiration, and using a paging message with identification information to trigger the device, allowing it to remain operational as if attached, without modifying existing 3GPP specifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the UE is detached from the network to reduce network activity, then network resources and signaling are minimized, but the UE cannot be triggered or woken up by ordinary paging mechanisms
Solution Approach 1:
The patent introduces a specialized triggering mechanism that acts as an intermediary between the network and detached UEs. When a UE is detached, the network stores its identification information and can later trigger it by sending a paging message containing the stored identification. This intermediary triggering mechanism resolves the contradiction by enabling device wake-up without requiring the UE to remain attached to the network.
2Ease of operation
If CBS or MBMS are used to trigger detached UEs, then device triggering capability is achieved, but implementation overhead and device complexity increase
Solution Approach 1:
The patent employs a lightweight triggering approach that avoids the complexity of CBS or MBMS implementations. Instead of requiring full CBS/MBMS infrastructure and device support, the network uses simple stored identification information to send targeted paging messages to detached UEs. This disposable-like simple mechanism achieves triggering functionality without the heavy implementation overhead of CBS or MBMS.
3Reliability
If ordinary detachment signaling is used, then the UE is properly detached from the network, but the UE attempts periodic location updates increasing signaling
Solution Approach 1:
The patent extracts the essential detachment function from the complete detachment procedure. Instead of performing full detachment with all its signaling consequences (including periodic location updates), the network locally detaches the UE by storing its identification information and preventing location update attempts. This extracted detachment mechanism maintains reliable detachment state while eliminating the harmful periodic signaling that would otherwise occur.
Data Source
AI summary
The invention discloses an arrangement for triggering a user equipment, wherein the user equipment is not connected to the network. In the machine type communications there is a need for reducing network activity, however, at the same time there is a need for being able to wake up a device. In the arrangement the network detaches the user equipment locally and is then triggered when needed.