Radio Link Failure Management for Wireless Devices
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Solution Overview
Problem
Current wireless communication networks experience service discontinuity and performance degradation due to Radio Link Failures (RLF) when devices with improved radio coverage capabilities, such as those using beamforming, still declare RLF despite having a good data connection, leading to unnecessary interruptions and increased power consumption.
Innovation Solution
Implementing a second RLF procedure for wireless devices with enhanced radio coverage capabilities, which includes configuring longer timers, different thresholds, and alternative reference signals to avoid unnecessary RLF declarations and enable detection of coverage holes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a standard RLF procedure is applied to devices with improved radio coverage capabilities, then the device can maintain compatibility with legacy networks, but the device will experience unnecessary RLF declarations and service interruptions
Solution Approach 1:
The patent applies local quality by configuring device-specific RLF parameters based on the device's radio coverage capability. Devices with improved coverage capabilities (e.g., beamforming devices) receive customized RLF configuration including extended timers and adjusted thresholds, while legacy devices continue using standard parameters. This ensures each device type operates with appropriate sensitivity levels for its capabilities.
Solution Approach 2:
The patent changes RLF detection parameters (timers, thresholds, reference signals) based on device capabilities. Specifically, devices with improved radio coverage are configured with longer RLF detection timers and adjusted signal quality thresholds, preventing premature RLF declarations while maintaining accurate failure detection for actual link issues.
2Device complexity
If a standard RLF procedure is used, then the network can maintain simple and uniform management, but devices with improved coverage capabilities experience unnecessary RLF declarations leading to increased power consumption
Solution Approach 1:
The patent introduces dynamic RLF parameter configuration where the network can adaptively adjust RLF detection parameters based on device capabilities and network conditions. The system dynamically selects between standard and extended RLF procedures, allowing flexible management that responds to actual device characteristics rather than using fixed uniform parameters.
Solution Approach 2:
The patent changes RLF parameters (timers, thresholds) based on device radio coverage capability to prevent unnecessary RLF declarations. By extending the RLF detection timer and adjusting thresholds for devices with improved coverage, the system avoids premature failure declarations that would trigger unnecessary reconnections and power consumption.
3Device complexity
If standard RLF thresholds are applied, then the network can use simple and universal detection criteria, but devices with beamforming or improved coverage cannot distinguish between actual link failures and temporary signal fluctuations
Solution Approach 1:
The patent applies local quality by implementing device-specific RLF detection thresholds and criteria. Devices with improved radio coverage capabilities receive customized detection parameters including adjusted signal quality thresholds and extended evaluation periods, allowing them to distinguish between temporary fluctuations and actual failures more accurately than universal thresholds permit.
Solution Approach 2:
The patent applies preliminary action by pre-configuring devices with improved coverage capabilities with extended RLF detection parameters before failures occur. The network provides devices with appropriate timer values and threshold settings in advance, enabling these devices to accurately evaluate signal conditions and avoid premature RLF declarations during temporary signal variations.
Data Source
AI summary
Radio link failures, “RLF”, of a wireless device served by a wireless communication network are managed. A first, default, RLF procedure is associated with at least a first type of wireless devices supported by the wireless communication network. The wireless device obtains, e.g. received from a network node information indicative of a second RLF procedure based on that the wireless device is of a second type having an improved radio coverage capability compared to the first type. The wireless device applies, based on the obtained information, said second RLF procedure.