Adaptive Receive Diversity for Mobile Wireless Devices
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Solution Overview
Problem
Mobile wireless devices face challenges in balancing signal reception performance with power consumption during discontinuous reception modes, particularly in wireless networks with varying signal quality, leading to potential missed page messages and increased battery drain.
Innovation Solution
A method and apparatus for adapting receive diversity in mobile wireless devices with multiple antennas and receivers, where the processor switches between single and multiple antenna/receiver configurations based on measured downlink signal quality and error checking codes to optimize signal reception while minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple antennas and receivers are used simultaneously to improve signal reception, then signal reception reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic adaptation of receive diversity by switching between single-antenna and multi-antenna modes based on real-time signal quality measurements. The processor monitors downlink signal quality and adjusts the number of active antennas and receivers accordingly, transitioning from static to dynamic operation to balance reliability and power consumption.
Solution Approach 2:
The system changes operational parameters (number of active antennas, number of active receivers) based on measured signal quality conditions. When signal quality is poor, the system increases the number of active reception components; when signal quality is good, it reduces to minimize power consumption, thus adapting parameters to environmental conditions.
2Reliability
If receive diversity is enabled continuously to ensure reliable signal reception, then signal quality is improved, but battery life decreases
Solution Approach 1:
The patent implements periodic monitoring of signal quality conditions and adjusts receive diversity configuration accordingly. The system periodically evaluates downlink signal quality and switches between diverse reception modes, rather than maintaining continuous diversity operation, thus extending battery life while ensuring reliability when needed.
Solution Approach 2:
The mobile wireless device autonomously monitors its own signal quality conditions and automatically adjusts its reception configuration without external intervention. The processor self-regulates the activation of antennas and receivers based on real-time measurements, enabling the device to manage its own power consumption and reliability needs.
3Use of energy by moving object
If single antenna reception is used to reduce power consumption, then battery life is extended, but signal reception reliability deteriorates under poor signal conditions
Solution Approach 1:
The system continuously measures downlink signal quality and uses this feedback information to adjust the reception configuration. When feedback indicates poor signal quality, the system activates additional antennas and receivers to improve reliability; when feedback shows good signal quality, it maintains single-antenna mode to conserve power.
4Reliability
If the mobile device monitors all paging channels continuously to ensure no messages are missed, then message delivery reliability is improved, but power consumption increases
Solution Approach 1:
The patent dynamically adjusts paging channel monitoring based on signal quality conditions. When downlink signal quality is poor, the system activates multiple antennas and receivers to enhance paging message detection capability; when signal quality is good, it reduces monitoring intensity to conserve power while maintaining adequate reliability.
Data Source
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AI summary
A mobile wireless device adapts receive diversity during discontinuous reception based on downlink signal quality, page indicators and page messages. When the downlink signal quality exceeds a pre-determined threshold, the mobile wireless device decodes a page indicator channel through an initial antenna, and otherwise, decodes a paging channel through the initial antenna without decoding the page indicator channel. The mobile wireless device switches to decoding the paging channel through an alternate antenna when a page indicator decodes as an erasure. When a paging message received through a single antenna decodes with an incorrect error checking code, the mobile wireless devices enables receive diversity through multiple antennas for subsequent decoding. The mobile wireless device switches between single antenna reception and multiple antenna reception based on tracking multiple consecutive error checking code failures and successes.