Power Saving Mode Control in 5G IoT Devices
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Solution Overview
Problem
In mobile communication systems, particularly in 5G and IoT environments, there is a need to minimize power consumption and effectively control Access Stratum timers during Power Saving Mode (PSM) to optimize battery life in devices like machine type communication devices that require low power usage.
Innovation Solution
A method and device for controlling Power Saving Mode (PSM) in UE devices, which involves setting PSM, triggering connection requests, determining if they are barred, and maintaining the PSM setting when barred, while managing Access Stratum timers to extend PSM until a subsequent call is retried, thereby minimizing power consumption and avoiding unnecessary idle mode operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the UE frequently checks for connection requests during PSM, then connection responsiveness is improved, but power consumption increases
Solution Approach 1:
The UE implements periodic checking of connection requests at specific intervals during PSM rather than continuous monitoring. The AS timer defines periodic wake-up intervals where the UE checks for pending connection requests, allowing it to balance responsiveness with power conservation by remaining in low-power state between periodic checks.
Solution Approach 2:
The network performs preliminary actions by buffering downlink data and generating connection requests before the UE needs to access them. The UE checks for these pre-prepared connection requests during periodic wake-ups, allowing the network to prepare data in advance so the UE doesn't need to continuously monitor for incoming data.
2Reliability
If the UE exits PSM to handle connection requests, then connection reliability is improved, but power consumption increases
Solution Approach 1:
Instead of fully exiting PSM for every connection request, the UE implements partial action by checking for buffered connection requests during periodic wake-ups. Only when actual data transmission is needed does the UE fully exit PSM, reducing the frequency and duration of high-power states while maintaining reliable connection handling.
Solution Approach 2:
The AS timer acts as an intermediary mechanism that mediates between PSM and full connection mode. It provides a intermediate state where the UE can check for connection requests without fully exiting PSM, allowing gradual transition from low-power mode to active communication only when necessary.
3Productivity
If the AS timer is set to a short duration, then connection request handling is improved, but PSM effectiveness is reduced
Solution Approach 1:
The system dynamically adjusts the AS timer duration parameter based on network conditions and UE state. The timer can be extended when the UE is in PSM to reduce wake-up frequency and power consumption, while still allowing timely handling of connection requests when they occur, optimizing the balance between productivity and energy efficiency.
Data Source
AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services.A method for Power Saving Mode (PSM) operation control of a UE in a mobile communication system is provided. The method includes: setting a PSM for the UE; triggering a connection request of the UE in the PSM; determining whether the connection request has been barred; and maintaining the PSM setting when it is determined that the connection request has been barred.