UE EPS Fallback Fast Return for 5G SA Reconnection Priority
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Solution Overview
Problem
Wireless communication systems face challenges in managing wireless channel resources due to signal attenuation and blocking, undermining established channel measuring and reporting mechanisms, necessitating improvements in EPS fallback procedures for optimal resource utilization.
Innovation Solution
A user equipment (UE) initiates a procedure for a mobile terminated or mobile originated call in a first radio access technology network, receives a command to switch to a second network, establishes a connection, and starts a timer to prioritize returning to the first network in standalone mode, facilitating efficient reconnection to a 5G standalone network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the UE returns to the first RAT network immediately after the call ends in the second RAT network, then the network switching time is reduced, but the UE cannot take advantage of the superior service availability and performance of the 5G standalone network
Solution Approach 1:
The UE performs measurements and prepares for potential return to the first RAT network before the call actually ends, by monitoring timer values and maintaining measurement configurations. This preliminary preparation allows for faster switching when needed while currently benefiting from the superior 5G SA network performance
Solution Approach 2:
The UE dynamically adjusts its network behavior based on timer values and call status. The timer configuration allows the UE to remain in the second RAT network for a predetermined period after call end, but can switch back to the first RAT network if certain conditions are met, creating a flexible, dynamic network selection strategy
2Reliability
If the UE stays longer in the 5G standalone network after the call, then service availability and performance are enhanced, but the network resource utilization efficiency decreases
Solution Approach 1:
The network configures specific timer values and measurement parameters that control how long the UE remains in the 5G SA network after call end. By adjusting these parameters, the network can optimize the balance between keeping the UE connected for superior service experience versus freeing up resources for other users, thereby managing resource utilization efficiency
3Productivity
If the UE performs frequent measurements and reporting to optimize channel resources, then resource utilization efficiency is improved, but the complexity of channel measuring and reporting mechanisms increases
Solution Approach 1:
The UE autonomously monitors timer values and determines when to return to the first RAT network based on pre-configured criteria, without requiring continuous network commands or complex real-time negotiations. This self-service approach simplifies the interaction while maintaining efficient resource utilization through UE-initiated measurements and reporting
Data Source
AI summary
Certain aspects of the present disclosure provide a technique for wireless communications by a user equipment (UE). The UE starts a procedure for a mobile terminated (MT) or mobile originated (MO) call in a first radio access technology (RAT) network. The UE receives a first command for the UE to move to a second RAT network to continue the call, and in response establishes a connection with the second RAT network to continue the call. The UE starts a timer based on an end of the call and take one or more actions dependent at least in part on the timer to prioritize return to the first RAT network in a standalone (SA) mode.