Adaptive DRX Paging for Wireless Power Optimization
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Solution Overview
Problem
Mobile devices face significant power consumption challenges due to advanced telecommunications and display technologies, necessitating improved methods to optimize battery life and reduce idle mode current drain.
Innovation Solution
The method involves determining if a mobile device is stationary based on GPS coordinates or reception characteristics, and entering a low power mode by skipping certain paging occasions or DRX cycles, thereby reducing power consumption by only powering the transceiver for necessary instances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile device continuously monitors paging occasions to maintain reliable connectivity, then the reliability of paging reception is improved, but the power consumption increases
Solution Approach 1:
The patent applies dynamics by making the paging monitoring behavior adaptive rather than static. The device dynamically adjusts its paging monitoring strategy based on detected conditions (stationary vs. mobile state, signal quality metrics). When stationary and experiencing good signal quality, the device skips paging occasions to save power. When mobile or experiencing poor signal quality, it monitors all paging occasions to ensure reliable reception. This dynamic adaptation resolves the contradiction between reliability and power consumption.
Solution Approach 2:
The patent changes the parameter of paging occasion monitoring frequency based on detected conditions. By measuring signal quality metrics (RSSI, SINR, BLER) and device mobility state, the system adjusts the paging monitoring parameter - either monitoring every paging occasion or skipping some paging occasions. This parameter change allows the system to optimize the trade-off between paging reception reliability and power consumption under different operating conditions.
2Use of energy by moving object
If the mobile device enters a low power mode by skipping paging occasions, then the power consumption is reduced, but the paging performance may be degraded
Solution Approach 1:
The patent applies preliminary action by performing signal quality measurements and mobility detection before deciding to enter low power mode. The device proactively assesses conditions (measuring RSSI, SINR, BLER, detecting stationary state) and makes informed decisions about skipping paging occasions. This preliminary assessment ensures that low power mode is only entered when conditions are favorable, preventing paging performance degradation while still achieving power savings.
Solution Approach 2:
The patent implements feedback mechanisms where the device continuously monitors signal quality metrics and paging reception outcomes. Based on this feedback, the system adjusts its paging monitoring behavior - maintaining full monitoring when signal quality is poor or device is mobile, and skipping paging occasions when signal quality is good and device is stationary. This feedback loop ensures paging performance is maintained when necessary while enabling power savings when conditions permit.
3Productivity
If the mobile device uses advanced telecommunications technologies like MIMO and larger displays, then the transmission and reception capabilities are improved, but the power consumption increases
Solution Approach 1:
The patent applies periodic action by implementing Discontinuous Reception (DRX) cycles where the device periodically wakes up to monitor paging occasions and then returns to sleep mode. Within this periodic framework, the device further optimizes by skipping certain paging occasions based on conditions. This periodic operation pattern allows the device to maintain capability for transmission and reception while significantly reducing average power consumption compared to continuous operation.
Data Source
AI summary
Methods and apparatus for power optimization in e.g., a wireless mobile device. In one embodiment, the optimization is effected via intelligent idle mode current drain management. In an exemplary LTE cellular network context, the user equipment (UE) only powers on its transceiver for a subset of Discontinuous Reception (DRX) cycles based on e.g., the quality of the radio environment, power considerations, location, etc. For example, if a UE has not moved, and its radio reception quality is good, the UE is likely to successfully receive a paging notification (i.e., without multiple attempts). Consequently, the UE configures itself to receive only a single paging indication.