User Equipment Power Control with Selective Receiver Diversity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The use of receive diversity in user equipment for mobile communications increases power consumption, significantly reducing talk times while improving signal quality, necessitating a solution that balances power efficiency with high signal quality.
Innovation Solution
Implementing a power control system that selectively activates and deactivates receiver diversity based on signal quality metrics, such as SIR and TPC command error rates, to conserve power only when performance improvement is required, thereby maintaining high signal quality without constant receiver diversity activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If receiver diversity is activated all the time to improve signal quality, then call drop rate is reduced, but power consumption increases significantly
Solution Approach 1:
The patent applies dynamics by making the receiver diversity configuration changeable based on operating conditions. The system dynamically switches between RxDiv mode and non-RxDiv mode according to signal quality metrics (RSCP, Ec/Io) and traffic conditions, rather than maintaining a fixed configuration. This resolves the contradiction by activating diversity only when needed for reliability while saving power during normal conditions.
Solution Approach 2:
The patent changes the parameter of receiver diversity configuration (activated/deactivated) based on measured signal quality parameters (RSCP, Ec/Io) and traffic conditions. By monitoring these parameters and adjusting the diversity configuration accordingly, the system maintains call reliability when signal quality degrades while conserving power when conditions are good, thus resolving the contradiction between reliability and power consumption.
2Reliability
If receiver diversity is activated all the time to reduce call drops, then signal quality is improved, but talk time is reduced
Solution Approach 1:
The system dynamically adjusts receiver diversity activation based on real-time conditions, extending talk time by avoiding continuous diversity operation. Diversity is activated only during degraded signal conditions or high-priority traffic, allowing normal operation to proceed with lower power consumption and longer battery life, thus resolving the contradiction between reliability and talk time duration.
Solution Approach 2:
The patent changes the operational state parameter of the receiver diversity based on monitored signal quality and traffic parameters. This conditional activation extends talk time by minimizing diversity usage to only when necessary for maintaining call reliability, thereby resolving the contradiction between improving reliability and extending operational duration.
3Use of energy by moving object
If receiver diversity is selectively activated based on signal quality, then power consumption is reduced, but signal quality may deteriorate
Solution Approach 1:
The patent implements feedback by continuously monitoring signal quality metrics (RSCP, Ec/Io) and traffic conditions, then using this feedback to control receiver diversity activation. When signal quality degrades below thresholds or during high-priority traffic, diversity is activated to maintain quality. This closed-loop control ensures power savings during normal operation while guaranteeing signal quality when needed, resolving the contradiction between power consumption and signal quality.
Solution Approach 2:
The system performs preliminary assessment of signal quality and traffic conditions before activating receiver diversity. By evaluating RSCP, Ec/Io, and traffic parameters in advance, the system activates diversity proactively when degradation is detected or preemptively during high-priority traffic, preventing quality deterioration while avoiding unnecessary activation, thus resolving the contradiction between power consumption and signal quality maintenance.
Data Source
AI summary
A user equipment includes a plurality of antennas to receive downlink signals from a base station, a plurality of receiver circuits each coupled to a respective one of the plurality of antennas to process the received downlink signals, an SIR estimation unit to estimate a quality of the received downlink signals, a power loop controller to generate transmit power control commands based on the estimated quality of the received downlink signals, the transmit power control commands being directed to the base station to adjust a power of the downlink signals and a diversity controller to selectively activate and deactivate one or more of the receiver circuits depending on the estimated quality of the received downlink signals.