RF Filter Bandwidth Adjustment for Mobile Device Power Optimization
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Solution Overview
Problem
Wireless communication devices (WCDs) face challenges in managing battery life and maintaining audio quality due to switching between high-power and low-power modes, with existing systems lacking efficient mechanisms to adjust filtering bandwidth and RF bandwidth accordingly, leading to potential performance degradation during communication sessions.
Innovation Solution
The WCDs employ a filtering component that adjusts its bandwidth by enabling or disabling multiple filters based on operating mode, with an override indicator ensuring high-power mode operation for applications requiring quality of service (QOS) and communicating network indicators to the RAN to adjust RF and audio codec settings accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the WCD operates in high-power mode with wide filtering bandwidth to maintain high audio quality, then audio quality is improved, but battery consumption increases
Solution Approach 1:
The system dynamically adjusts the filtering bandwidth of the RF receiver based on the operating mode. In high-power mode, a wide filtering bandwidth is used to maintain high audio quality. In low-power mode, the filtering bandwidth is reduced by disabling subset filters, thereby reducing power consumption while maintaining adequate audio quality for the current operational context.
Solution Approach 2:
The system changes the filtering bandwidth parameter according to the operating mode. By adjusting this parameter - using wide bandwidth in high-power mode and narrow bandwidth in low-power mode - the system optimizes the balance between audio quality and power consumption based on current operational requirements.
2Duration of action of stationary object
If the WCD switches to low-power mode with narrow filtering bandwidth to conserve battery life, then battery life is extended, but audio quality degrades
Solution Approach 1:
The system dynamically adjusts the filtering bandwidth based on the operating mode. When in low-power mode, the system reduces power consumption by disabling subset filters to create a narrow filtering bandwidth, which extends battery life while maintaining adequate audio quality for the current operational context.
Solution Approach 2:
The system changes the filtering bandwidth parameter according to the operating mode. By adjusting this parameter - using narrow bandwidth in low-power mode - the system optimizes the balance between battery life and audio quality based on current operational requirements.
3Use of energy by moving object
If the WCD disables subset filters to narrow filtering bandwidth for power saving, then power consumption is reduced, but the ability to handle wide RF bandwidth signals is compromised
Solution Approach 1:
The system dynamically adjusts the filtering bandwidth based on the operating mode. When in low-power mode, the system reduces power consumption by disabling subset filters, creating a narrow filtering bandwidth that is sufficient for the reduced RF bandwidth signals used in low-power mode, thus maintaining adaptability to current operational requirements.
Solution Approach 2:
The system changes the filtering bandwidth parameter according to the operating mode. By adjusting this parameter - using narrow bandwidth in low-power mode - the system optimizes the balance between power consumption and signal handling capability based on current operational requirements.
4Measurement precision
If the WCD maintains wide filtering bandwidth to support high-quality audio applications, then audio performance is preserved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts the filtering bandwidth based on the operating mode and QoS requirements. For applications with high QoS requirements, the system maintains a wide filtering bandwidth to preserve high-quality audio performance. For applications with lower QoS requirements, the system reduces the filtering bandwidth to lower power consumption, thus dynamically optimizing the balance between audio performance and power consumption.
Solution Approach 2:
The system changes the filtering bandwidth parameter according to the operating mode and QoS requirements. By adjusting this parameter - using wide bandwidth for high-QoS applications and narrow bandwidth for standard applications - the system optimizes the balance between audio performance and power consumption based on current operational requirements.
Data Source
AI summary
Methods and systems are provided for conserving resources of a wireless communication device (WCD). A WCD may be configured to operate in one of two modes while in communication with the RAN. In a high-power mode, the WCD operates with a filtering component having a first filtering bandwidth. The first a filtering bandwidth generally enables the WCD to provide high quality audio signals based on a first audio bandwidth of an audio codec. In a low-power mode, the WCD operates with the filtering component having a second filtering bandwidth. The second filtering bandwidth enables the WCD to provide a lower quality audio signal based on a second audio bandwidth having a narrower audio bandwidth than the first audio bandwidth.