Mobile Station Frequency Selection via GPS Location
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Solution Overview
Problem
Current frequency selection methodologies for mobile devices in idle states are inefficient, leading to underutilization and overutilization of channels, reduced wireless capacity, and increased risk of dropped calls due to imprecise control over channel redirection, especially at sector borders and in areas where redirection signals are not received.
Innovation Solution
A mobile station equipped with a location determination device and a spatial database that allows it to determine its geographic location and autonomously tune to the appropriate frequency channel without relying on network communication, using GPS and spatial database queries to identify the correct sector and channel for communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If RF-based channel redirection is used, then mobile stations can be redirected to different frequencies, but the area control is imprecise and not all mobile stations within the sector need redirection
Solution Approach 1:
The patent replaces RF-based mechanical signal transmission with GPS-based geographic location determination. Mobile stations use GPS to identify their precise location and query a spatial database to determine the correct channel, eliminating the need for RF redirection signals and enabling precise area control through geographic coordinates rather than RF signal coverage.
Solution Approach 2:
The patent introduces a spatial database as an intermediary between mobile stations and channel assignment. Instead of direct RF-based redirection, mobile stations query the spatial database using their GPS location to determine the appropriate channel, allowing precise control over which stations receive redirection based on their geographic position rather than RF signal presence.
2Productivity
If RF-based redirection signals are transmitted, then mobile stations can be redirected, but signals leak into border areas that do not require redirection and capacity is reduced
Solution Approach 1:
The patent eliminates RF signal transmission for redirection by substituting it with GPS-based location determination and spatial database queries. Mobile stations independently determine their location and query the database to identify the correct channel, eliminating signal leakage into border areas while maintaining redirection functionality and preserving wireless capacity.
3Reliability
If mobile stations wait for redirection signals, then channel redirection can be implemented, but mobile stations may miss the signal and dropped calls occur
Solution Approach 1:
The patent implements preliminary action by having mobile stations proactively determine their geographic location using GPS and query the spatial database before needing redirection. This eliminates the need to wait for network-transmitted redirection signals, ensuring mobile stations always have up-to-date channel information and preventing dropped calls due to missed signals.
Solution Approach 2:
The patent enables mobile stations to autonomously determine their own channel assignment by using GPS location determination and spatial database queries. Instead of passively waiting for network redirection signals, mobile stations independently service their own channel selection, ensuring reliable call completion without dependency on network signal transmission timing.
4Device complexity
If sector areas are defined by RF transmission, then base station coverage is established, but RF control is inherently difficult and imprecise
Solution Approach 1:
The patent replaces RF-based sector definition with GPS-based geographic coordinate systems. Instead of defining sectors through complex RF transmission patterns that are difficult to control, the system uses precise geographic coordinates and a spatial database to define sector areas, achieving both simplicity in implementation and high precision in sector boundary definition.
Data Source
AI summary
A mobile network sector is served via at least an antenna and a mobile network base station transceiver to provide communications with a mobile station. The mobile station includes a mobile station antenna and a location determination device for identifying a geographic location of the mobile station. A transceiver in the mobile station is configured to transmit and receive signals to and from the mobile network base stations, via the mobile station antenna. A microprocessor controls the transmission and reception of the mobile communication signals and communicates with the location determination device. A spatial database identifies geographic positions related to sectors of mobile network base stations. The microprocessor compares the geographical location of the mobile station with the geographic positions of the mobile sectors to determine a preferred mobile network sector and redirect the transceiver to tune to a particular channel supported by the preferred mobile network sector.