Adaptive Fast Return to NR for Voice Call Data Continuity
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Solution Overview
Problem
User equipment (UE) experiences data transmission interruptions during blind autonomous fast return to New Radio (NR) from Long Term Evolution (LTE) due to network failures, leading to inefficient data connection management during voice calls.
Innovation Solution
The UE monitors data performance parameters on the LTE network and evaluates NR availability to adaptively determine whether to remain on LTE or return to NR based on these parameters, minimizing data gaps and improving user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the UE performs blind autonomous fast return to NR from LTE, then the return speed to NR is improved, but data transmission interruption occurs due to network failures
Solution Approach 1:
The UE performs preliminary actions by monitoring data performance parameters (throughput, latency, packet loss) and NR network availability before initiating the fast return. This advance monitoring allows the UE to assess whether conditions are favorable for returning to NR, preventing premature returns that would cause data transmission interruptions.
Solution Approach 2:
The UE implements a feedback mechanism by continuously monitoring data performance parameters on LTE and NR network availability status. This feedback information is used to dynamically adjust the return decision, ensuring that the fast return is only triggered when performance metrics indicate it is safe and beneficial to switch networks, thereby maintaining data transmission continuity.
2Loss of time
If the UE triggers blind autonomous fast return to NR, then the connection establishment time is reduced, but data connection release occurs leading to transmission interruption
Solution Approach 1:
The UE performs preliminary evaluation of data performance parameters and NR network availability before triggering the autonomous fast return. This preliminary check ensures that the return decision is made only when conditions are favorable, preventing unnecessary connection releases and maintaining data transmission efficiency.
Solution Approach 2:
The UE changes the decision parameters for fast return by incorporating data performance thresholds (throughput, latency, packet loss) and NR network availability status. Instead of using fixed timing thresholds alone, the system dynamically adjusts return decisions based on real-time parameter changes in network performance and availability.
Data Source
AI summary
A user equipment (UE) configured to connect to a first network, perform a voice call fallback operation comprising disconnecting from the first network and performing a voice call on a second network, initiate a data service comprising uplink of data via the second network during the voice call, monitor data performance parameters associated with the second network and when the voice call is completed and there remains data to be uplinked for the data service, determine whether to remain on the second network or to return to the first network based at least on the data performance parameters.