Mobile Station Call Origination via Alternate Coverage Area
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Solution Overview
Problem
In wireless communication networks, a mobile station may experience poor quality communication due to obstructions interfering with reverse-link signals, even if the forward-link signal is strong, leading to call drops and reduced packet throughput, as the network may incorrectly determine the coverage area with the strongest forward-link signal as the best for communication.
Innovation Solution
The system detects call drops and stores the geographic location, then determines if the mobile station is within a threshold distance of that location before attempting a second call, and if so, switches to a different wireless coverage area to avoid obstructions, allowing communication via a new set of coverage areas that do not include the obstructed area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the mobile station connects to the coverage area with the strongest forward-link RF signal, then the forward-link communication quality is improved, but the reverse-link communication quality deteriorates due to obstructions
Solution Approach 1:
The mobile station dynamically switches between different coverage areas based on real-time communication quality assessment. Instead of statically connecting to the coverage area with the strongest forward-link signal, the system continuously evaluates both forward-link and reverse-link conditions and adapts the connection accordingly, making the coverage area selection dynamic rather than fixed.
Solution Approach 2:
The mobile station uses feedback from reverse-link communication quality measurements to adjust its coverage area selection. By monitoring reverse-link packet throughput and communication quality, the system feeds this information back into the coverage area selection process, preventing connection to coverage areas that would cause call drops despite having strong forward-link signals.
2Ease of operation
If the mobile station attempts to originate a call via the coverage area with the strongest forward-link signal, then the connection establishment is simplified, but call drops occur due to localized obstructions
Solution Approach 1:
The mobile station performs preliminary assessment of coverage areas before attempting call origination. By evaluating both forward-link and reverse-link communication quality in advance and selecting a suitable coverage area beforehand, the system avoids the need for complex retry logic during call establishment while ensuring reliable connection from the start.
Solution Approach 2:
The mobile station autonomously selects the optimal coverage area for call origination based on its own measurements of forward-link and reverse-link signal quality. The system serves itself by making intelligent coverage area selection without requiring external network intervention, thereby simplifying the call origination process while improving reliability.
3Productivity
If the network divides a single coverage area into multiple coverage areas, then the total communication capacity is increased, but the complexity of coverage area selection increases
Solution Approach 1:
The mobile station evaluates coverage areas based on local communication quality conditions specific to each coverage area. By assessing forward-link and reverse-link signal characteristics locally for each coverage area and selecting the one with the best overall quality, the system simplifies the selection process despite multiple coverage areas being available, focusing on local quality metrics rather than complex global optimization.
Data Source
AI summary
Methods and systems are provided causing a mobile station to, after experiencing a dropped call, originate a subsequent call via a coverage area different than that used for the first call. In an embodiment, a mobile station detects that, when it was engaged in the first call at a first location via a first wireless coverage area, the mobile station experienced the first call being dropped. When the mobile station subsequently attempts to originate a second call, the mobile station determines that its current location is within a threshold distance of the first location, and responsively attempts to originate the second call via a second wireless coverage area different from the first.