Power Mode Database for Mobile Device Positioning
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Solution Overview
Problem
Mobile devices face inefficiencies in power management for wireless communications and positioning systems, particularly in areas with unavailable SPS signals or where high positioning accuracy is not required, leading to unnecessary power consumption.
Innovation Solution
A power mode database is created on the mobile device or remotely, associating location zones with power modes based on contextual information, allowing the device to dynamically adjust its operating power mode for efficient RF signal reception and consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the SPS receiver and wireless transceiver are actively operated for positioning measurements, then positioning accuracy is improved, but device power consumption increases
Solution Approach 1:
The patent implements dynamic power mode selection that adapts the operating mode of the SPS receiver and wireless transceiver based on real-time location context. The system transitions between different power modes (e.g., high-accuracy positioning mode, low-power mode, idle mode) depending on whether the device is in motion or stationary, and based on the availability of alternative positioning methods, thereby optimizing the balance between positioning accuracy and power consumption
Solution Approach 2:
The system changes operational parameters by selecting different power modes that adjust the receiver's sensitivity, sampling rate, and signal processing intensity. By modifying these parameters according to location context and motion state, the system achieves adequate positioning accuracy with reduced power consumption in appropriate scenarios
2Reliability
If the SPS receiver is operated in areas where SPS signals are unavailable, then positioning functionality is maintained, but device power is unnecessarily consumed
Solution Approach 1:
The patent introduces an intermediary location context database that mediates between the positioning request and the SPS receiver operation. This database provides advance information about signal availability in different location zones, allowing the system to select alternative positioning methods (e.g., Wi-Fi positioning, cellular triangulation, inertial navigation) when SPS signals are unavailable, thereby avoiding unnecessary power consumption while maintaining positioning functionality
Solution Approach 2:
The system performs preliminary actions by pre-populating a location context database with information about SPS signal availability in various geographic areas. This advance preparation enables the positioning system to make informed decisions about whether to activate the SPS receiver before actually attempting positioning, preventing wasteful power consumption in areas where signals are known to be unavailable
3Use of energy by moving object
If power savings modes are implemented to disable wireless transceivers when signals are not available, then power consumption is reduced, but positioning accuracy may be compromised
Solution Approach 1:
The patent implements dynamic power mode selection that adapts the operating mode of the SPS receiver and wireless transceiver based on real-time location context. The system transitions between different power modes (e.g., high-accuracy positioning mode, low-power mode, idle mode) depending on whether the device is in motion or stationary, and based on the availability of alternative positioning methods, thereby optimizing the balance between positioning accuracy and power consumption
Solution Approach 2:
The system incorporates feedback mechanisms that continuously monitor positioning performance and signal availability conditions. Based on this feedback, the system dynamically adjusts the power mode to ensure that positioning accuracy requirements are met while minimizing power consumption, preventing the system from entering overly aggressive power-saving modes that would compromise accuracy
Data Source
AI summary
A mobile device may be configured to build a power mode database for positioning based on the mobile device's location and associate power mode information, including the operating mode that is requested for positioning and the operating mode that is used for positioning at the location. Additional factors may be associated with the location including contextual information, such as user context, environmental context, and temporal context. The power mode database may be a local database on the mobile device or a remote database, such as a crowdsourced database, accessible via a server. The mobile device may access the power mode database based on a current location and requested operating mode, as well as contextual information, to obtain the actual operating mode to be used for positioning at the location.