Mobile Terminal Position Detection and Power Control
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Solution Overview
Problem
Existing mobile communication terminal apparatuses with multiple wireless communication functions face challenges in efficiently controlling power consumption, particularly when W-LAN communication is unusable, due to the need for expensive GPS devices, server-managed base station information, and cumbersome signal processing to determine position information accurately.
Innovation Solution
A mobile communication terminal apparatus that generates position information using signals from one wireless communication function to determine the feasibility of operation for another, allowing for power supply control without expensive devices or complex signal processing, thereby reducing unnecessary power consumption and prolonging standby time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS device is used to detect position information, then position detection accuracy is improved, but device cost increases
Solution Approach 1:
The mobile phone base station serves multiple functions: it provides cellular communication service and simultaneously acts as a position detection reference. By reusing the existing base station infrastructure for position detection, the patent eliminates the need for dedicated GPS devices, resolving the contradiction between position detection accuracy and device cost.
Solution Approach 2:
The system uses the mobile phone base station's own transmission signals for position detection purposes. The base station's communication signals are repurposed to determine terminal position, making the system self-sufficient and eliminating the need for separate position detection equipment.
2Measurement precision
If server-managed base station information is used, then position determination accuracy is improved, but system cost increases
Solution Approach 1:
The mobile terminal apparatus performs position determination autonomously using signal strength measurements from multiple base stations. The terminal itself processes the signal strength information and determines its position without requiring a centralized server to manage base station information, eliminating the need for expensive server infrastructure.
Solution Approach 2:
The patent introduces a position information management database that stores pre-collected signal strength information from multiple base stations. This database acts as an intermediary, providing reference data to the terminal for position determination without requiring real-time server intervention or complex server-managed information systems.
3Measurement precision
If advanced signal processing is used to correct reception signal strength errors, then position determination accuracy is improved, but processing complexity increases
Solution Approach 1:
Signal strength information from multiple base stations is collected and stored in advance in a position information management database. By pre-collecting and organizing this data, the system eliminates the need for complex real-time signal processing and error correction algorithms, simplifying the terminal's processing requirements while maintaining position determination accuracy.
Solution Approach 2:
The system uses signal strength information from multiple base stations as feedback to determine terminal position. By comparing the measured signal strengths against pre-stored reference information from multiple sources, the system can accurately determine position without requiring complex error correction processing of individual signals.
4Adaptability or versatility
If W-LAN communication function maintains operative state, then communication availability is improved, but power consumption increases
Solution Approach 1:
The W-LAN communication function's power state is dynamically adjusted based on the terminal's determined position. When the terminal is in a location where W-LAN communication is not available or not needed, the function is turned off to save power. When the terminal enters a suitable location, the function is activated, achieving dynamic adaptation between communication availability and power consumption.
Data Source
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AI summary
A first position information generation unit (130) generates, based on a first radio signal received by a first wireless communication unit (110), first position information representing a position where the first radio signal is received. A second position information generation unit (140) generates, using the first position information, second position information representing a position where a second wireless communication unit (120) can receive a second radio signal. A wireless communication operation determination unit (150) determines, based on the generated first and second position information, whether the operation by the second wireless communication unit is possible. A power supply control unit (160) executes power supply control of the second wireless communication unit in accordance with a determination result. This allows to uniquely determine the position information of a mobile communication terminal apparatus by simple signal processing at a low cost and implement power supply control of wireless communication functions based on the position information.