Power Saving Mode Active Time Duration Optimization
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Solution Overview
Problem
Current power saving modes in wireless communication systems, particularly those combining Power Saving Mode (PSM) with Extended Discontinuous Reception (eDRX), face challenges in managing active time durations, leading to increased power consumption and reduced battery life as the active time of PSM cycles lengthens, which contradicts the original power-saving intent.
Innovation Solution
Implementing a variant of PSM that powers down the user equipment (UE) during eDRX idle periods and powers up during paging periods, optimizing the eDRX configuration to extend idle durations and reduce active durations, thereby minimizing power consumption and enhancing battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the active time duration of PSM is extended to maintain connectivity and receive paging messages, then the UE remains accessible for longer periods, but power consumption increases and battery life decreases
Solution Approach 1:
The patent implements periodic action by dividing the active time into periodic eDRX cycles with alternating active and idle periods. The UE periodically wakes up to check for paging messages during specific windows and then returns to sleep mode, creating a rhythmic pattern of activity that maintains connectivity while minimizing power consumption through regular sleep intervals.
Solution Approach 2:
The patent applies segmentation by dividing the continuous active time duration into multiple discrete eDRX cycles, each containing active sub-frames for paging reception and idle sub-frames for power saving. This segmentation allows the UE to maintain connectivity during active periods while achieving power savings during idle periods, resolving the contradiction between continuous availability and power consumption.
2Use of energy by moving object
If eDRX idle duration is extended to save power, then battery life increases, but the UE's ability to receive paging messages promptly decreases
Solution Approach 1:
The patent applies preliminary action by configuring the UE to wake up at predetermined paging occasions before actual paging messages are transmitted. The network schedules paging messages to arrive during these pre-configured active windows, allowing the UE to sleep during idle periods while ensuring it is awake and ready to receive messages at the appropriate times without delay.
Solution Approach 2:
The patent uses periodic action through eDRX cycles that regularly alternate between active and idle states. By establishing a periodic pattern where the UE wakes up at regular intervals during configured paging occasions, the system ensures timely message reception while maximizing power savings during the periodic idle intervals between wake-ups.
3Use of energy by moving object
If the UE powers down during eDRX idle duration to maximize power savings, then battery life increases, but the UE cannot respond to incoming calls or messages
Solution Approach 1:
The patent resolves this contradiction through periodic action by implementing regular wake-up cycles during eDRX operation. The UE periodically transitions from power-down state to active state at predetermined paging occasions, allowing it to receive paging messages and respond to communications while remaining in power-saving mode during intermediate periods. This rhythmic pattern ensures the UE is responsive when needed while maximizing power savings otherwise.
Solution Approach 2:
The patent applies dynamics by making the UE's power state flexible and time-dependent rather than static. The UE dynamically switches between powered-down and active states based on the eDRX cycle timing and network paging schedules, optimizing the balance between power consumption and communication responsiveness by being active only during necessary periods and powered down during safe intervals.
Data Source
AI summary
This disclosure provides systems, methods, and devices for wireless communication that support enhanced power saving mode (PSM) for an active time duration of a PSM with extended discontinuous reception (eDRX) configuration in a wireless communication system. In one aspect, a user equipment (UE) is configured to enter a deep sleep mode during inactive times of a PSM, and to operate in eDRX mode during the active times of the PSM. Operating in eDRX mode during the active times includes dividing each of the active time durations into at least one eDRX idle period and at least one eDRX paging period. The UE determines whether a set of criteria for implementing a variant of the PSM is met, and when the set of criteria is met, the UE implements the variant of the PSM, which includes powering down the UE to a deep sleep mode at least during eDRX idle periods.