Multi-Stage Paging Indicator Detection for Wireless Terminals
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently detecting paging indicators due to noise and fading, leading to high false alarm and miss rates, which affect battery life and communication performance.
Innovation Solution
A multi-stage and multi-threshold detection mechanism is employed, using measurement metrics derived from received paging indicators and channel conditions to determine the presence of paging signals, with thresholds set based on signal-to-noise ratio (SNR) and channel gain to minimize false alarms and miss rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single threshold is used for paging indicator detection, then the detection mechanism is simple, but it cannot simultaneously minimize false alarm and miss rate when channel gain ratio is changing
Solution Approach 1:
The detection mechanism is divided into multiple stages (first stage, second stage, third stage) with different thresholds applied at each stage. This segmentation allows the system to handle different channel conditions appropriately, reducing both false alarms and miss rates while maintaining manageable complexity through a structured multi-stage approach.
Solution Approach 2:
The detection system dynamically adapts by using different thresholds based on channel conditions and stage progression. The thresholds are not fixed but are applied conditionally across multiple stages, allowing the system to respond to changing channel gain ratios and optimize detection performance under varying conditions.
2Reliability
If the mobile terminal frequently decodes information in the common channel to ensure reliable paging detection, then detection reliability improves, but battery power consumption increases
Solution Approach 1:
The system performs partial decoding actions only when necessary - using quick paging channel indicators to filter out obvious non-paging cases before committing to full common channel decoding. This partial action approach reduces unnecessary full decodings and saves battery power while maintaining reliable detection by performing full decoding only when the quick indicators suggest paging is likely.
Solution Approach 2:
The system performs preliminary detection using quick paging channel indicators before committing to full common channel decoding. This preliminary action filters out cases that clearly indicate no paging, allowing the mobile terminal to return to sleep mode without consuming excessive power, while still maintaining reliable detection by proceeding to full decoding only when paging is indicated.
3Use of energy by moving object
If the mobile terminal stays in sleep mode to conserve battery power, then energy consumption decreases, but the ability to detect paging indicators reliably deteriorates due to low SNR
Solution Approach 1:
The detection process is segmented into multiple stages with increasing detection confidence requirements. The first stage uses a first threshold for initial filtering, the second stage uses a second threshold for further validation, and the third stage uses a third threshold for final confirmation. This segmentation allows the system to operate with lower power while maintaining detection precision through progressive verification.
Solution Approach 2:
The quick paging channel indicators serve as an intermediary mechanism between the low-power sleep mode and full common channel decoding. These indicators provide a middle-ground detection mechanism that consumes less power than full decoding while still improving detection precision over simple single-threshold methods, acting as a mediator that bridges the gap between power conservation and detection reliability.
Data Source
AI summary
A method and system is disclosed for detecting paging indicators using a multi-stage and multi-threshold detection mechanism so that a mobile terminal can be removed from an idle mode appropriately. After receiving a first paging indicator, it is determined whether a first indicator measurement corresponding to the first paging indicator is between a first and a second predetermined thresholds. After receiving a second paging indicator which may be a temporal diversity counterpart of the first paging indicator, a second indicator measurement derived based on both the first and second paging indicators is compared against a third predetermined threshold, wherein the mobile terminal is removed from the idle mode when both comparisons are appropriately conducted.