Radio Link Failure Timer Adaptation for 5G Reconnection
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Solution Overview
Problem
In 5G wireless networks, high-frequency radio links suffer from lower signal-to-noise ratios and are prone to alignment issues and blockages, leading to suboptimal radio link re-establishment procedures due to their high directivity and fragility.
Innovation Solution
A client device dynamically adjusts the radio link failure timer based on actual radio link properties, postponing or advancing the declaration of radio link failure to optimize re-establishment procedures, and communicates this value to network access nodes for resource allocation and environmental awareness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the radio link failure timer uses a fixed value, then the procedure is simple and fast, but it cannot adapt to short-term variations in radio link quality, leading to unnecessary re-establishment attempts
Solution Approach 1:
The patent applies dynamics by making the radio link failure timer value adaptive rather than fixed. The timer value is dynamically adjusted based on the ratio of first parameter (time period when timer is reset and started) to second parameter (time period when timer is started and reset), allowing the system to respond to changing radio link conditions while maintaining operational simplicity through automated determination.
2Reliability
If the radio link failure timer value is extended, then short-term variations can be accommodated, but reconnection is delayed in unfavorable conditions
Solution Approach 1:
The patent applies parameter changes by adjusting the timer value based on the ratio of two time parameters. When the ratio indicates stable conditions, the timer is extended to accommodate short-term variations. When the ratio indicates unfavorable conditions, the timer is reduced to enable timely reconnection, thus optimizing both reliability and response time through dynamic parameter adjustment.
3Speed
If the radio link failure timer value is reduced, then timely reconnection is achieved, but unnecessary re-establishment attempts occur due to short-term variations
Solution Approach 1:
The patent uses parameter changes to optimize the timer value based on actual radio link conditions. By calculating the ratio of the first parameter (reset-to-start time period) to the second parameter (start-to-reset time period), the system adjusts the timer to achieve fast reconnection when needed while avoiding unnecessary re-establishment attempts during stable periods.
4Productivity
If the client device determines and communicates timer values dynamically, then network performance is optimized, but device complexity and processing load increase
Solution Approach 1:
The patent applies self-service by enabling the client device to autonomously determine its own radio link failure timer value based on observed radio link behavior. The device monitors the first parameter (when timer is reset and started) and second parameter (when timer is started and reset), calculates their ratio, and adjusts the timer accordingly without requiring complex network coordination, thus optimizing performance while maintaining manageable device complexity.
Data Source
AI summary
This application provides a client device, a method, and a computer program. The client device obtains a first parameter associated with a radio link failure timer. The first parameter indicates a first time period during which the radio link failure timer is reset and thereafter started. The client device further obtains a second parameter associated with the radio link failure timer. The second parameter indicates a second time period during which the radio link failure timer is started and thereafter reset. Based on the first parameter and the second parameter, the client device determines a value of the radio link failure timer.