Periodic Triggered Location Service for IoT Power Management
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Solution Overview
Problem
Current location services for IoT devices are hindered by features like extended Discontinuous Reception (eDRX) or Power Saving Mode (PSM), which render them unreachable for long periods, preventing real-time location services such as geofencing and asset tracking.
Innovation Solution
Implementing a periodic and triggered location service that allows IoT devices to initiate location reporting even when in an idle state, with features like maximum reporting intervals and event sampling intervals to ensure continuous location tracking without constant network queries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If IoT devices use extended Discontinuous Reception (eDRX) or Power Saving Mode (PSM) to reduce power consumption, then energy efficiency is improved, but location services become unavailable during idle periods
Solution Approach 1:
The network entity stores location request information in advance when the UE is in idle state. The location service is activated when the UE becomes reachable, without requiring real-time network queries. This preliminary storage of request data enables location services to function reliably even when the device is periodically unreachable due to power-saving modes.
Solution Approach 2:
The network entity acts as an intermediary by storing the location request information and managing the activation process. It receives the location request when the UE is unreachable, stores the request data, and then activates the service when the UE becomes reachable, thereby mediating between the UE's power-saving state and the location service requirements.
2Measurement precision
If the network continuously queries IoT devices for location updates, then location tracking accuracy is improved, but power consumption increases
Solution Approach 1:
Instead of continuous querying, the system uses periodic action by storing location requests and activating them when the UE naturally becomes reachable during its periodic wake-up cycles. This allows location updates to be obtained at appropriate intervals without requiring continuous network contact, thereby maintaining tracking capability while respecting the device's power-saving schedule.
Solution Approach 2:
The UE autonomously determines when to become reachable and report location information based on its own power-saving schedule. The network entity does not need to actively query the device, but rather waits for the UE to self-initiate contact during its periodic wake-up periods, allowing the device to control its own power consumption while still enabling location services.
3Use of energy by moving object
If location services are activated only when UEs are reachable, then power consumption is reduced, but real-time location services such as geofencing and asset tracking are prevented
Solution Approach 1:
The network entity performs preliminary actions by storing the location request information in advance when the UE is in idle state. This stored request information is then used to activate location services when the UE becomes reachable, ensuring that location functionality is maintained without requiring continuous device availability or real-time activation.
Solution Approach 2:
The system ensures continuity of useful action by maintaining location service capability across the UE's periodic idle and active states. The stored request information bridges the gaps when the device is unreachable, ensuring that location tracking, geofencing, and asset tracking functions continue uninterrupted despite the device's periodic power-saving mode transitions.
Data Source
AI summary
Methods and techniques are described for initiating a periodic and triggered location (200) in a target UE (102). After an LCS Client (160) requests (1) initiation of periodic and triggered location reporting from the UE, two intermediate responses (7, 11) are returned by a network. A first response (7) indicates that the periodic and triggered location request has been received and accepted by the network. A second response (11) indicates that periodic and triggered location has been activated in the UE. Additionally, a periodic and triggered location request may include a maximum event sampling interval and a maximum reporting interval and one or more location triggers. The maximum event sampling interval can limit UE power consumption and the maximum reporting interval can detect when periodic and triggered location is no longer active in a UE. The location triggers may include periodic reporting, reporting using area events or reporting based on UE motion.