Wireless Device Elevator Mode Detection and Service Recovery
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Solution Overview
Problem
Wireless devices face challenges in quickly re-establishing service on their preferred radio access technology after exiting an elevator or elevator-like conditions, leading to potential service interruptions and increased power consumption due to aggressive scanning for service.
Innovation Solution
A wireless device is configured to detect conditions associated with entering and exiting elevator-like environments, switching between 'elevator mode' and 'normal mode' to adjust its service search patterns and cell re-selection strategies, optimizing service recovery and power efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the wireless device performs aggressive scanning for service after exiting the elevator, then the service re-establishment speed is improved, but the power consumption increases
Solution Approach 1:
The wireless device detects elevator exit conditions (such as signal strength changes, motion patterns, or location-based triggers) and proactively switches to elevator mode before service re-establishment is needed. This preliminary detection and mode switching enables the device to prepare optimized scanning parameters in advance, achieving faster service recovery without sustained high power consumption during normal operation.
Solution Approach 2:
The wireless device dynamically adjusts its scanning behavior based on the detected elevator condition state. When inside the elevator, the device uses a first scanning pattern optimized for rapid service acquisition. When outside the elevator, it transitions to a second, more power-efficient scanning pattern. This dynamic adaptation resolves the contradiction by applying aggressive scanning only when necessary while maintaining power efficiency during normal operation.
2Speed
If the wireless device uses modified service search patterns in elevator mode, then the service acquisition speed is improved, but the device complexity increases
Solution Approach 1:
The wireless device implements elevator mode by modifying existing scanning parameters (such as scanning interval, cell reselection thresholds, or measurement reporting configurations) rather than adding fundamentally new functional components. These parameter changes enable faster service acquisition in elevator conditions while maintaining compatibility with the existing device architecture, thus avoiding excessive complexity increase.
3Reliability
If the wireless device continuously monitors conditions for elevator detection, then the service availability is improved, but the power consumption increases
Solution Approach 1:
The wireless device employs periodic condition monitoring with adjustable intervals rather than continuous monitoring. The monitoring frequency can be dynamically adjusted based on the current operational state, signal conditions, and elevator detection confidence levels. This periodic approach maintains reliable service availability detection while significantly reducing power consumption compared to continuous monitoring.
Data Source
AI summary
This disclosure relates to techniques for a wireless device to detect and operate in an elevator or elevator-like conditions. The wireless device may establish a cellular link with a cellular base station. One or more conditions associated with being in an elevator may be detected. The wireless device may determine to operate in an elevator mode based at least in part on detecting the one or more conditions associated with being in an elevator. The wireless device may operate in the elevator mode. One or more conditions associated with exiting an elevator may be detected. The wireless device may determine to operate in a normal mode based at least in part on detecting the one or more conditions associated with exiting an elevator. The wireless device may operate in the normal mode.